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 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 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 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 99err1: 100 return -EINVAL; 101} 102 103static 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 115static 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 130void free_rd_atomic_resource(struct resp_res *res) 131{ 132 res->type = 0; 133} 134 135static 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 148static 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 186static int rxe_init_sq(struct rxe_qp *qp, struct ib_qp_init_attr *init, 187 struct ib_udata *udata, 188 struct rxe_create_qp_resp __user *uresp) 189{ 190 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 191 int wqe_size; 192 int err; 193 194 qp->sq.max_wr = init->cap.max_send_wr; 195 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge), 196 init->cap.max_inline_data); 197 qp->sq.max_sge = wqe_size / sizeof(struct ib_sge); 198 qp->sq.max_inline = wqe_size; 199 wqe_size += sizeof(struct rxe_send_wqe); 200 201 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, wqe_size, 202 QUEUE_TYPE_FROM_CLIENT); 203 if (!qp->sq.queue) { 204 rxe_err_qp(qp, "Unable to allocate send queue\n"); 205 err = -ENOMEM; 206 goto err_out; 207 } 208 209 /* prepare info for caller to mmap send queue if user space qp */ 210 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, 211 qp->sq.queue->buf, qp->sq.queue->buf_size, 212 &qp->sq.queue->ip); 213 if (err) { 214 rxe_err_qp(qp, "do_mmap_info failed, err = %d\n", err); 215 goto err_free; 216 } 217 218 /* return actual capabilities to caller which may be larger 219 * than requested 220 */ 221 init->cap.max_send_wr = qp->sq.max_wr; 222 init->cap.max_send_sge = qp->sq.max_sge; 223 init->cap.max_inline_data = qp->sq.max_inline; 224 225 return 0; 226 227err_free: 228 vfree(qp->sq.queue->buf); 229 kfree(qp->sq.queue); 230 qp->sq.queue = NULL; 231err_out: 232 return err; 233} 234 235static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, 236 struct ib_qp_init_attr *init, struct ib_udata *udata, 237 struct rxe_create_qp_resp __user *uresp) 238{ 239 int err; 240 241 /* if we don't finish qp create make sure queue is valid */ 242 skb_queue_head_init(&qp->req_pkts); 243 244 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); 245 if (err < 0) 246 return err; 247 qp->sk->sk->sk_user_data = qp; 248 249 /* pick a source UDP port number for this QP based on 250 * the source QPN. this spreads traffic for different QPs 251 * across different NIC RX queues (while using a single 252 * flow for a given QP to maintain packet order). 253 * the port number must be in the Dynamic Ports range 254 * (0xc000 - 0xffff). 255 */ 256 qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff); 257 258 err = rxe_init_sq(qp, init, udata, uresp); 259 if (err) 260 return err; 261 262 qp->req.wqe_index = queue_get_producer(qp->sq.queue, 263 QUEUE_TYPE_FROM_CLIENT); 264 265 qp->req.opcode = -1; 266 qp->comp.opcode = -1; 267 268 rxe_init_task(&qp->req.task, qp, rxe_requester); 269 rxe_init_task(&qp->comp.task, qp, rxe_completer); 270 271 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 272 if (init->qp_type == IB_QPT_RC) { 273 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0); 274 timer_setup(&qp->retrans_timer, retransmit_timer, 0); 275 } 276 return 0; 277} 278 279static int rxe_init_rq(struct rxe_qp *qp, struct ib_qp_init_attr *init, 280 struct ib_udata *udata, 281 struct rxe_create_qp_resp __user *uresp) 282{ 283 struct rxe_dev *rxe = to_rdev(qp->ibqp.device); 284 int wqe_size; 285 int err; 286 287 qp->rq.max_wr = init->cap.max_recv_wr; 288 qp->rq.max_sge = init->cap.max_recv_sge; 289 wqe_size = sizeof(struct rxe_recv_wqe) + 290 qp->rq.max_sge*sizeof(struct ib_sge); 291 292 qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr, wqe_size, 293 QUEUE_TYPE_FROM_CLIENT); 294 if (!qp->rq.queue) { 295 rxe_err_qp(qp, "Unable to allocate recv queue\n"); 296 err = -ENOMEM; 297 goto err_out; 298 } 299 300 /* prepare info for caller to mmap recv queue if user space qp */ 301 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, 302 qp->rq.queue->buf, qp->rq.queue->buf_size, 303 &qp->rq.queue->ip); 304 if (err) { 305 rxe_err_qp(qp, "do_mmap_info failed, err = %d\n", err); 306 goto err_free; 307 } 308 309 /* return actual capabilities to caller which may be larger 310 * than requested 311 */ 312 init->cap.max_recv_wr = qp->rq.max_wr; 313 314 return 0; 315 316err_free: 317 vfree(qp->rq.queue->buf); 318 kfree(qp->rq.queue); 319 qp->rq.queue = NULL; 320err_out: 321 return err; 322} 323 324static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 325 struct ib_qp_init_attr *init, 326 struct ib_udata *udata, 327 struct rxe_create_qp_resp __user *uresp) 328{ 329 int err; 330 331 /* if we don't finish qp create make sure queue is valid */ 332 skb_queue_head_init(&qp->resp_pkts); 333 334 if (!qp->srq) { 335 err = rxe_init_rq(qp, init, udata, uresp); 336 if (err) 337 return err; 338 } 339 340 rxe_init_task(&qp->resp.task, qp, rxe_responder); 341 342 qp->resp.opcode = OPCODE_NONE; 343 qp->resp.msn = 0; 344 345 return 0; 346} 347 348/* called by the create qp verb */ 349int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 350 struct ib_qp_init_attr *init, 351 struct rxe_create_qp_resp __user *uresp, 352 struct ib_pd *ibpd, 353 struct ib_udata *udata) 354{ 355 int err; 356 struct rxe_cq *rcq = to_rcq(init->recv_cq); 357 struct rxe_cq *scq = to_rcq(init->send_cq); 358 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 359 unsigned long flags; 360 361 rxe_get(pd); 362 rxe_get(rcq); 363 rxe_get(scq); 364 if (srq) 365 rxe_get(srq); 366 367 qp->pd = pd; 368 qp->rcq = rcq; 369 qp->scq = scq; 370 qp->srq = srq; 371 372 atomic_inc(&rcq->num_wq); 373 atomic_inc(&scq->num_wq); 374 375 rxe_qp_init_misc(rxe, qp, init); 376 377 err = rxe_qp_init_req(rxe, qp, init, udata, uresp); 378 if (err) 379 goto err1; 380 381 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); 382 if (err) 383 goto err2; 384 385 spin_lock_irqsave(&qp->state_lock, flags); 386 qp->attr.qp_state = IB_QPS_RESET; 387 qp->valid = 1; 388 spin_unlock_irqrestore(&qp->state_lock, flags); 389 390 return 0; 391 392err2: 393 rxe_queue_cleanup(qp->sq.queue); 394 qp->sq.queue = NULL; 395err1: 396 atomic_dec(&rcq->num_wq); 397 atomic_dec(&scq->num_wq); 398 399 qp->pd = NULL; 400 qp->rcq = NULL; 401 qp->scq = NULL; 402 qp->srq = NULL; 403 404 if (srq) 405 rxe_put(srq); 406 rxe_put(scq); 407 rxe_put(rcq); 408 rxe_put(pd); 409 410 return err; 411} 412 413/* called by the query qp verb */ 414int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 415{ 416 init->event_handler = qp->ibqp.event_handler; 417 init->qp_context = qp->ibqp.qp_context; 418 init->send_cq = qp->ibqp.send_cq; 419 init->recv_cq = qp->ibqp.recv_cq; 420 init->srq = qp->ibqp.srq; 421 422 init->cap.max_send_wr = qp->sq.max_wr; 423 init->cap.max_send_sge = qp->sq.max_sge; 424 init->cap.max_inline_data = qp->sq.max_inline; 425 426 if (!qp->srq) { 427 init->cap.max_recv_wr = qp->rq.max_wr; 428 init->cap.max_recv_sge = qp->rq.max_sge; 429 } 430 431 init->sq_sig_type = qp->sq_sig_type; 432 433 init->qp_type = qp->ibqp.qp_type; 434 init->port_num = 1; 435 436 return 0; 437} 438 439int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 440 struct ib_qp_attr *attr, int mask) 441{ 442 if (mask & IB_QP_PORT) { 443 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) { 444 rxe_dbg_qp(qp, "invalid port %d\n", attr->port_num); 445 goto err1; 446 } 447 } 448 449 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 450 goto err1; 451 452 if (mask & IB_QP_ACCESS_FLAGS) { 453 if (!(qp_type(qp) == IB_QPT_RC || qp_type(qp) == IB_QPT_UC)) 454 goto err1; 455 if (attr->qp_access_flags & ~RXE_ACCESS_SUPPORTED_QP) 456 goto err1; 457 } 458 459 if (mask & IB_QP_AV && rxe_av_chk_attr(qp, &attr->ah_attr)) 460 goto err1; 461 462 if (mask & IB_QP_ALT_PATH) { 463 if (rxe_av_chk_attr(qp, &attr->alt_ah_attr)) 464 goto err1; 465 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) { 466 rxe_dbg_qp(qp, "invalid alt port %d\n", attr->alt_port_num); 467 goto err1; 468 } 469 if (attr->alt_timeout > 31) { 470 rxe_dbg_qp(qp, "invalid alt timeout %d > 31\n", 471 attr->alt_timeout); 472 goto err1; 473 } 474 } 475 476 if (mask & IB_QP_PATH_MTU) { 477 struct rxe_port *port = &rxe->port; 478 479 enum ib_mtu max_mtu = port->attr.max_mtu; 480 enum ib_mtu mtu = attr->path_mtu; 481 482 if (mtu > max_mtu) { 483 rxe_dbg_qp(qp, "invalid mtu (%d) > (%d)\n", 484 ib_mtu_enum_to_int(mtu), 485 ib_mtu_enum_to_int(max_mtu)); 486 goto err1; 487 } 488 } 489 490 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 491 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 492 rxe_dbg_qp(qp, "invalid max_rd_atomic %d > %d\n", 493 attr->max_rd_atomic, 494 rxe->attr.max_qp_rd_atom); 495 goto err1; 496 } 497 } 498 499 if (mask & IB_QP_TIMEOUT) { 500 if (attr->timeout > 31) { 501 rxe_dbg_qp(qp, "invalid timeout %d > 31\n", 502 attr->timeout); 503 goto err1; 504 } 505 } 506 507 return 0; 508 509err1: 510 return -EINVAL; 511} 512 513/* move the qp to the reset state */ 514static void rxe_qp_reset(struct rxe_qp *qp) 515{ 516 /* stop tasks from running */ 517 rxe_disable_task(&qp->resp.task); 518 rxe_disable_task(&qp->comp.task); 519 rxe_disable_task(&qp->req.task); 520 521 /* drain work and packet queuesc */ 522 rxe_requester(qp); 523 rxe_completer(qp); 524 rxe_responder(qp); 525 526 if (qp->rq.queue) 527 rxe_queue_reset(qp->rq.queue); 528 if (qp->sq.queue) 529 rxe_queue_reset(qp->sq.queue); 530 531 /* cleanup attributes */ 532 atomic_set(&qp->ssn, 0); 533 qp->req.opcode = -1; 534 qp->req.need_retry = 0; 535 qp->req.wait_for_rnr_timer = 0; 536 qp->req.noack_pkts = 0; 537 qp->resp.msn = 0; 538 qp->resp.opcode = -1; 539 qp->resp.drop_msg = 0; 540 qp->resp.goto_error = 0; 541 qp->resp.sent_psn_nak = 0; 542 543 if (qp->resp.mr) { 544 rxe_put(qp->resp.mr); 545 qp->resp.mr = NULL; 546 } 547 548 cleanup_rd_atomic_resources(qp); 549 550 /* reenable tasks */ 551 rxe_enable_task(&qp->resp.task); 552 rxe_enable_task(&qp->comp.task); 553 rxe_enable_task(&qp->req.task); 554} 555 556/* move the qp to the error state */ 557void rxe_qp_error(struct rxe_qp *qp) 558{ 559 unsigned long flags; 560 561 spin_lock_irqsave(&qp->state_lock, flags); 562 qp->attr.qp_state = IB_QPS_ERR; 563 564 /* drain work and packet queues */ 565 rxe_sched_task(&qp->resp.task); 566 rxe_sched_task(&qp->comp.task); 567 rxe_sched_task(&qp->req.task); 568 spin_unlock_irqrestore(&qp->state_lock, flags); 569} 570 571static void rxe_qp_sqd(struct rxe_qp *qp, struct ib_qp_attr *attr, 572 int mask) 573{ 574 unsigned long flags; 575 576 spin_lock_irqsave(&qp->state_lock, flags); 577 qp->attr.sq_draining = 1; 578 rxe_sched_task(&qp->comp.task); 579 rxe_sched_task(&qp->req.task); 580 spin_unlock_irqrestore(&qp->state_lock, flags); 581} 582 583/* caller should hold qp->state_lock */ 584static int __qp_chk_state(struct rxe_qp *qp, struct ib_qp_attr *attr, 585 int mask) 586{ 587 enum ib_qp_state cur_state; 588 enum ib_qp_state new_state; 589 590 cur_state = (mask & IB_QP_CUR_STATE) ? 591 attr->cur_qp_state : qp->attr.qp_state; 592 new_state = (mask & IB_QP_STATE) ? 593 attr->qp_state : cur_state; 594 595 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) 596 return -EINVAL; 597 598 if (mask & IB_QP_STATE && cur_state == IB_QPS_SQD) { 599 if (qp->attr.sq_draining && new_state != IB_QPS_ERR) 600 return -EINVAL; 601 } 602 603 return 0; 604} 605 606static const char *const qps2str[] = { 607 [IB_QPS_RESET] = "RESET", 608 [IB_QPS_INIT] = "INIT", 609 [IB_QPS_RTR] = "RTR", 610 [IB_QPS_RTS] = "RTS", 611 [IB_QPS_SQD] = "SQD", 612 [IB_QPS_SQE] = "SQE", 613 [IB_QPS_ERR] = "ERR", 614}; 615 616/* called by the modify qp verb */ 617int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 618 struct ib_udata *udata) 619{ 620 int err; 621 622 if (mask & IB_QP_CUR_STATE) 623 qp->attr.cur_qp_state = attr->qp_state; 624 625 if (mask & IB_QP_STATE) { 626 unsigned long flags; 627 628 spin_lock_irqsave(&qp->state_lock, flags); 629 err = __qp_chk_state(qp, attr, mask); 630 if (!err) { 631 qp->attr.qp_state = attr->qp_state; 632 rxe_dbg_qp(qp, "state -> %s\n", 633 qps2str[attr->qp_state]); 634 } 635 spin_unlock_irqrestore(&qp->state_lock, flags); 636 637 if (err) 638 return err; 639 640 switch (attr->qp_state) { 641 case IB_QPS_RESET: 642 rxe_qp_reset(qp); 643 break; 644 case IB_QPS_SQD: 645 rxe_qp_sqd(qp, attr, mask); 646 break; 647 case IB_QPS_ERR: 648 rxe_qp_error(qp); 649 break; 650 default: 651 break; 652 } 653 } 654 655 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 656 int max_rd_atomic = attr->max_rd_atomic ? 657 roundup_pow_of_two(attr->max_rd_atomic) : 0; 658 659 qp->attr.max_rd_atomic = max_rd_atomic; 660 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 661 } 662 663 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 664 int max_dest_rd_atomic = attr->max_dest_rd_atomic ? 665 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; 666 667 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 668 669 free_rd_atomic_resources(qp); 670 671 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 672 if (err) 673 return err; 674 } 675 676 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 677 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 678 679 if (mask & IB_QP_ACCESS_FLAGS) 680 qp->attr.qp_access_flags = attr->qp_access_flags; 681 682 if (mask & IB_QP_PKEY_INDEX) 683 qp->attr.pkey_index = attr->pkey_index; 684 685 if (mask & IB_QP_PORT) 686 qp->attr.port_num = attr->port_num; 687 688 if (mask & IB_QP_QKEY) 689 qp->attr.qkey = attr->qkey; 690 691 if (mask & IB_QP_AV) 692 rxe_init_av(&attr->ah_attr, &qp->pri_av); 693 694 if (mask & IB_QP_ALT_PATH) { 695 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av); 696 qp->attr.alt_port_num = attr->alt_port_num; 697 qp->attr.alt_pkey_index = attr->alt_pkey_index; 698 qp->attr.alt_timeout = attr->alt_timeout; 699 } 700 701 if (mask & IB_QP_PATH_MTU) { 702 qp->attr.path_mtu = attr->path_mtu; 703 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 704 } 705 706 if (mask & IB_QP_TIMEOUT) { 707 qp->attr.timeout = attr->timeout; 708 if (attr->timeout == 0) { 709 qp->qp_timeout_jiffies = 0; 710 } else { 711 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 712 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 713 714 qp->qp_timeout_jiffies = j ? j : 1; 715 } 716 } 717 718 if (mask & IB_QP_RETRY_CNT) { 719 qp->attr.retry_cnt = attr->retry_cnt; 720 qp->comp.retry_cnt = attr->retry_cnt; 721 rxe_dbg_qp(qp, "set retry count = %d\n", attr->retry_cnt); 722 } 723 724 if (mask & IB_QP_RNR_RETRY) { 725 qp->attr.rnr_retry = attr->rnr_retry; 726 qp->comp.rnr_retry = attr->rnr_retry; 727 rxe_dbg_qp(qp, "set rnr retry count = %d\n", attr->rnr_retry); 728 } 729 730 if (mask & IB_QP_RQ_PSN) { 731 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK); 732 qp->resp.psn = qp->attr.rq_psn; 733 rxe_dbg_qp(qp, "set resp psn = 0x%x\n", qp->resp.psn); 734 } 735 736 if (mask & IB_QP_MIN_RNR_TIMER) { 737 qp->attr.min_rnr_timer = attr->min_rnr_timer; 738 rxe_dbg_qp(qp, "set min rnr timer = 0x%x\n", 739 attr->min_rnr_timer); 740 } 741 742 if (mask & IB_QP_SQ_PSN) { 743 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 744 qp->req.psn = qp->attr.sq_psn; 745 qp->comp.psn = qp->attr.sq_psn; 746 rxe_dbg_qp(qp, "set req psn = 0x%x\n", qp->req.psn); 747 } 748 749 if (mask & IB_QP_PATH_MIG_STATE) 750 qp->attr.path_mig_state = attr->path_mig_state; 751 752 if (mask & IB_QP_DEST_QPN) 753 qp->attr.dest_qp_num = attr->dest_qp_num; 754 755 return 0; 756} 757 758/* called by the query qp verb */ 759int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 760{ 761 unsigned long flags; 762 763 *attr = qp->attr; 764 765 attr->rq_psn = qp->resp.psn; 766 attr->sq_psn = qp->req.psn; 767 768 attr->cap.max_send_wr = qp->sq.max_wr; 769 attr->cap.max_send_sge = qp->sq.max_sge; 770 attr->cap.max_inline_data = qp->sq.max_inline; 771 772 if (!qp->srq) { 773 attr->cap.max_recv_wr = qp->rq.max_wr; 774 attr->cap.max_recv_sge = qp->rq.max_sge; 775 } 776 777 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr); 778 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr); 779 780 /* Applications that get this state typically spin on it. 781 * Yield the processor 782 */ 783 spin_lock_irqsave(&qp->state_lock, flags); 784 if (qp->attr.sq_draining) { 785 spin_unlock_irqrestore(&qp->state_lock, flags); 786 cond_resched(); 787 } else { 788 spin_unlock_irqrestore(&qp->state_lock, flags); 789 } 790 791 return 0; 792} 793 794int rxe_qp_chk_destroy(struct rxe_qp *qp) 795{ 796 /* See IBA o10-2.2.3 797 * An attempt to destroy a QP while attached to a mcast group 798 * will fail immediately. 799 */ 800 if (atomic_read(&qp->mcg_num)) { 801 rxe_dbg_qp(qp, "Attempt to destroy while attached to multicast group\n"); 802 return -EBUSY; 803 } 804 805 return 0; 806} 807 808/* called when the last reference to the qp is dropped */ 809static void rxe_qp_do_cleanup(struct work_struct *work) 810{ 811 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work); 812 unsigned long flags; 813 814 spin_lock_irqsave(&qp->state_lock, flags); 815 qp->valid = 0; 816 spin_unlock_irqrestore(&qp->state_lock, flags); 817 qp->qp_timeout_jiffies = 0; 818 819 if (qp_type(qp) == IB_QPT_RC) { 820 del_timer_sync(&qp->retrans_timer); 821 del_timer_sync(&qp->rnr_nak_timer); 822 } 823 824 if (qp->resp.task.func) 825 rxe_cleanup_task(&qp->resp.task); 826 827 if (qp->req.task.func) 828 rxe_cleanup_task(&qp->req.task); 829 830 if (qp->comp.task.func) 831 rxe_cleanup_task(&qp->comp.task); 832 833 /* flush out any receive wr's or pending requests */ 834 rxe_requester(qp); 835 rxe_completer(qp); 836 rxe_responder(qp); 837 838 if (qp->sq.queue) 839 rxe_queue_cleanup(qp->sq.queue); 840 841 if (qp->srq) 842 rxe_put(qp->srq); 843 844 if (qp->rq.queue) 845 rxe_queue_cleanup(qp->rq.queue); 846 847 if (qp->scq) { 848 atomic_dec(&qp->scq->num_wq); 849 rxe_put(qp->scq); 850 } 851 852 if (qp->rcq) { 853 atomic_dec(&qp->rcq->num_wq); 854 rxe_put(qp->rcq); 855 } 856 857 if (qp->pd) 858 rxe_put(qp->pd); 859 860 if (qp->resp.mr) 861 rxe_put(qp->resp.mr); 862 863 free_rd_atomic_resources(qp); 864 865 if (qp->sk) { 866 if (qp_type(qp) == IB_QPT_RC) 867 sk_dst_reset(qp->sk->sk); 868 869 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 870 sock_release(qp->sk); 871 } 872} 873 874/* called when the last reference to the qp is dropped */ 875void rxe_qp_cleanup(struct rxe_pool_elem *elem) 876{ 877 struct rxe_qp *qp = container_of(elem, typeof(*qp), elem); 878 879 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work); 880} 881