1 /* 2 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. 3 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 #include <linux/skbuff.h> 35 #include <linux/delay.h> 36 #include <linux/sched.h> 37 #include <linux/vmalloc.h> 38 #include <rdma/uverbs_ioctl.h> 39 40 #include "rxe.h" 41 #include "rxe_loc.h" 42 #include "rxe_queue.h" 43 #include "rxe_task.h" 44 45 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap, 46 int has_srq) 47 { 48 if (cap->max_send_wr > rxe->attr.max_qp_wr) { 49 pr_warn("invalid send wr = %d > %d\n", 50 cap->max_send_wr, rxe->attr.max_qp_wr); 51 goto err1; 52 } 53 54 if (cap->max_send_sge > rxe->attr.max_send_sge) { 55 pr_warn("invalid send sge = %d > %d\n", 56 cap->max_send_sge, rxe->attr.max_send_sge); 57 goto err1; 58 } 59 60 if (!has_srq) { 61 if (cap->max_recv_wr > rxe->attr.max_qp_wr) { 62 pr_warn("invalid recv wr = %d > %d\n", 63 cap->max_recv_wr, rxe->attr.max_qp_wr); 64 goto err1; 65 } 66 67 if (cap->max_recv_sge > rxe->attr.max_recv_sge) { 68 pr_warn("invalid recv sge = %d > %d\n", 69 cap->max_recv_sge, rxe->attr.max_recv_sge); 70 goto err1; 71 } 72 } 73 74 if (cap->max_inline_data > rxe->max_inline_data) { 75 pr_warn("invalid max inline data = %d > %d\n", 76 cap->max_inline_data, rxe->max_inline_data); 77 goto err1; 78 } 79 80 return 0; 81 82 err1: 83 return -EINVAL; 84 } 85 86 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init) 87 { 88 struct ib_qp_cap *cap = &init->cap; 89 struct rxe_port *port; 90 int port_num = init->port_num; 91 92 if (!init->recv_cq || !init->send_cq) { 93 pr_warn("missing cq\n"); 94 goto err1; 95 } 96 97 if (rxe_qp_chk_cap(rxe, cap, !!init->srq)) 98 goto err1; 99 100 if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) { 101 if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) { 102 pr_warn("invalid port = %d\n", port_num); 103 goto err1; 104 } 105 106 port = &rxe->port; 107 108 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) { 109 pr_warn("SMI QP exists for port %d\n", port_num); 110 goto err1; 111 } 112 113 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) { 114 pr_warn("GSI QP exists for port %d\n", port_num); 115 goto err1; 116 } 117 } 118 119 return 0; 120 121 err1: 122 return -EINVAL; 123 } 124 125 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n) 126 { 127 qp->resp.res_head = 0; 128 qp->resp.res_tail = 0; 129 qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL); 130 131 if (!qp->resp.resources) 132 return -ENOMEM; 133 134 return 0; 135 } 136 137 static void free_rd_atomic_resources(struct rxe_qp *qp) 138 { 139 if (qp->resp.resources) { 140 int i; 141 142 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 143 struct resp_res *res = &qp->resp.resources[i]; 144 145 free_rd_atomic_resource(qp, res); 146 } 147 kfree(qp->resp.resources); 148 qp->resp.resources = NULL; 149 } 150 } 151 152 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res) 153 { 154 if (res->type == RXE_ATOMIC_MASK) { 155 rxe_drop_ref(qp); 156 kfree_skb(res->atomic.skb); 157 } else if (res->type == RXE_READ_MASK) { 158 if (res->read.mr) 159 rxe_drop_ref(res->read.mr); 160 } 161 res->type = 0; 162 } 163 164 static void cleanup_rd_atomic_resources(struct rxe_qp *qp) 165 { 166 int i; 167 struct resp_res *res; 168 169 if (qp->resp.resources) { 170 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { 171 res = &qp->resp.resources[i]; 172 free_rd_atomic_resource(qp, res); 173 } 174 } 175 } 176 177 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp, 178 struct ib_qp_init_attr *init) 179 { 180 struct rxe_port *port; 181 u32 qpn; 182 183 qp->sq_sig_type = init->sq_sig_type; 184 qp->attr.path_mtu = 1; 185 qp->mtu = ib_mtu_enum_to_int(qp->attr.path_mtu); 186 187 qpn = qp->pelem.index; 188 port = &rxe->port; 189 190 switch (init->qp_type) { 191 case IB_QPT_SMI: 192 qp->ibqp.qp_num = 0; 193 port->qp_smi_index = qpn; 194 qp->attr.port_num = init->port_num; 195 break; 196 197 case IB_QPT_GSI: 198 qp->ibqp.qp_num = 1; 199 port->qp_gsi_index = qpn; 200 qp->attr.port_num = init->port_num; 201 break; 202 203 default: 204 qp->ibqp.qp_num = qpn; 205 break; 206 } 207 208 INIT_LIST_HEAD(&qp->grp_list); 209 210 skb_queue_head_init(&qp->send_pkts); 211 212 spin_lock_init(&qp->grp_lock); 213 spin_lock_init(&qp->state_lock); 214 215 atomic_set(&qp->ssn, 0); 216 atomic_set(&qp->skb_out, 0); 217 } 218 219 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp, 220 struct ib_qp_init_attr *init, struct ib_udata *udata, 221 struct rxe_create_qp_resp __user *uresp) 222 { 223 int err; 224 int wqe_size; 225 226 err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk); 227 if (err < 0) 228 return err; 229 qp->sk->sk->sk_user_data = qp; 230 231 /* pick a source UDP port number for this QP based on 232 * the source QPN. this spreads traffic for different QPs 233 * across different NIC RX queues (while using a single 234 * flow for a given QP to maintain packet order). 235 * the port number must be in the Dynamic Ports range 236 * (0xc000 - 0xffff). 237 */ 238 qp->src_port = RXE_ROCE_V2_SPORT + 239 (hash_32_generic(qp_num(qp), 14) & 0x3fff); 240 qp->sq.max_wr = init->cap.max_send_wr; 241 242 /* These caps are limited by rxe_qp_chk_cap() done by the caller */ 243 wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge), 244 init->cap.max_inline_data); 245 qp->sq.max_sge = init->cap.max_send_sge = 246 wqe_size / sizeof(struct ib_sge); 247 qp->sq.max_inline = init->cap.max_inline_data = wqe_size; 248 wqe_size += sizeof(struct rxe_send_wqe); 249 250 qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, wqe_size); 251 if (!qp->sq.queue) 252 return -ENOMEM; 253 254 err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata, 255 qp->sq.queue->buf, qp->sq.queue->buf_size, 256 &qp->sq.queue->ip); 257 258 if (err) { 259 vfree(qp->sq.queue->buf); 260 kfree(qp->sq.queue); 261 return err; 262 } 263 264 qp->req.wqe_index = producer_index(qp->sq.queue); 265 qp->req.state = QP_STATE_RESET; 266 qp->req.opcode = -1; 267 qp->comp.opcode = -1; 268 269 spin_lock_init(&qp->sq.sq_lock); 270 skb_queue_head_init(&qp->req_pkts); 271 272 rxe_init_task(rxe, &qp->req.task, qp, 273 rxe_requester, "req"); 274 rxe_init_task(rxe, &qp->comp.task, qp, 275 rxe_completer, "comp"); 276 277 qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */ 278 if (init->qp_type == IB_QPT_RC) { 279 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0); 280 timer_setup(&qp->retrans_timer, retransmit_timer, 0); 281 } 282 return 0; 283 } 284 285 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp, 286 struct ib_qp_init_attr *init, 287 struct ib_udata *udata, 288 struct rxe_create_qp_resp __user *uresp) 289 { 290 int err; 291 int wqe_size; 292 293 if (!qp->srq) { 294 qp->rq.max_wr = init->cap.max_recv_wr; 295 qp->rq.max_sge = init->cap.max_recv_sge; 296 297 wqe_size = rcv_wqe_size(qp->rq.max_sge); 298 299 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n", 300 qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size); 301 302 qp->rq.queue = rxe_queue_init(rxe, 303 &qp->rq.max_wr, 304 wqe_size); 305 if (!qp->rq.queue) 306 return -ENOMEM; 307 308 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata, 309 qp->rq.queue->buf, qp->rq.queue->buf_size, 310 &qp->rq.queue->ip); 311 if (err) { 312 vfree(qp->rq.queue->buf); 313 kfree(qp->rq.queue); 314 return err; 315 } 316 } 317 318 spin_lock_init(&qp->rq.producer_lock); 319 spin_lock_init(&qp->rq.consumer_lock); 320 321 skb_queue_head_init(&qp->resp_pkts); 322 323 rxe_init_task(rxe, &qp->resp.task, qp, 324 rxe_responder, "resp"); 325 326 qp->resp.opcode = OPCODE_NONE; 327 qp->resp.msn = 0; 328 qp->resp.state = QP_STATE_RESET; 329 330 return 0; 331 } 332 333 /* called by the create qp verb */ 334 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd, 335 struct ib_qp_init_attr *init, 336 struct rxe_create_qp_resp __user *uresp, 337 struct ib_pd *ibpd, 338 struct ib_udata *udata) 339 { 340 int err; 341 struct rxe_cq *rcq = to_rcq(init->recv_cq); 342 struct rxe_cq *scq = to_rcq(init->send_cq); 343 struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL; 344 345 rxe_add_ref(pd); 346 rxe_add_ref(rcq); 347 rxe_add_ref(scq); 348 if (srq) 349 rxe_add_ref(srq); 350 351 qp->pd = pd; 352 qp->rcq = rcq; 353 qp->scq = scq; 354 qp->srq = srq; 355 356 rxe_qp_init_misc(rxe, qp, init); 357 358 err = rxe_qp_init_req(rxe, qp, init, udata, uresp); 359 if (err) 360 goto err1; 361 362 err = rxe_qp_init_resp(rxe, qp, init, udata, uresp); 363 if (err) 364 goto err2; 365 366 qp->attr.qp_state = IB_QPS_RESET; 367 qp->valid = 1; 368 369 return 0; 370 371 err2: 372 rxe_queue_cleanup(qp->sq.queue); 373 err1: 374 if (srq) 375 rxe_drop_ref(srq); 376 rxe_drop_ref(scq); 377 rxe_drop_ref(rcq); 378 rxe_drop_ref(pd); 379 380 return err; 381 } 382 383 /* called by the query qp verb */ 384 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init) 385 { 386 init->event_handler = qp->ibqp.event_handler; 387 init->qp_context = qp->ibqp.qp_context; 388 init->send_cq = qp->ibqp.send_cq; 389 init->recv_cq = qp->ibqp.recv_cq; 390 init->srq = qp->ibqp.srq; 391 392 init->cap.max_send_wr = qp->sq.max_wr; 393 init->cap.max_send_sge = qp->sq.max_sge; 394 init->cap.max_inline_data = qp->sq.max_inline; 395 396 if (!qp->srq) { 397 init->cap.max_recv_wr = qp->rq.max_wr; 398 init->cap.max_recv_sge = qp->rq.max_sge; 399 } 400 401 init->sq_sig_type = qp->sq_sig_type; 402 403 init->qp_type = qp->ibqp.qp_type; 404 init->port_num = 1; 405 406 return 0; 407 } 408 409 /* called by the modify qp verb, this routine checks all the parameters before 410 * making any changes 411 */ 412 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp, 413 struct ib_qp_attr *attr, int mask) 414 { 415 enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ? 416 attr->cur_qp_state : qp->attr.qp_state; 417 enum ib_qp_state new_state = (mask & IB_QP_STATE) ? 418 attr->qp_state : cur_state; 419 420 if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) { 421 pr_warn("invalid mask or state for qp\n"); 422 goto err1; 423 } 424 425 if (mask & IB_QP_STATE) { 426 if (cur_state == IB_QPS_SQD) { 427 if (qp->req.state == QP_STATE_DRAIN && 428 new_state != IB_QPS_ERR) 429 goto err1; 430 } 431 } 432 433 if (mask & IB_QP_PORT) { 434 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) { 435 pr_warn("invalid port %d\n", attr->port_num); 436 goto err1; 437 } 438 } 439 440 if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq)) 441 goto err1; 442 443 if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr)) 444 goto err1; 445 446 if (mask & IB_QP_ALT_PATH) { 447 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr)) 448 goto err1; 449 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num)) { 450 pr_warn("invalid alt port %d\n", attr->alt_port_num); 451 goto err1; 452 } 453 if (attr->alt_timeout > 31) { 454 pr_warn("invalid QP alt timeout %d > 31\n", 455 attr->alt_timeout); 456 goto err1; 457 } 458 } 459 460 if (mask & IB_QP_PATH_MTU) { 461 struct rxe_port *port = &rxe->port; 462 463 enum ib_mtu max_mtu = port->attr.max_mtu; 464 enum ib_mtu mtu = attr->path_mtu; 465 466 if (mtu > max_mtu) { 467 pr_debug("invalid mtu (%d) > (%d)\n", 468 ib_mtu_enum_to_int(mtu), 469 ib_mtu_enum_to_int(max_mtu)); 470 goto err1; 471 } 472 } 473 474 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 475 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) { 476 pr_warn("invalid max_rd_atomic %d > %d\n", 477 attr->max_rd_atomic, 478 rxe->attr.max_qp_rd_atom); 479 goto err1; 480 } 481 } 482 483 if (mask & IB_QP_TIMEOUT) { 484 if (attr->timeout > 31) { 485 pr_warn("invalid QP timeout %d > 31\n", 486 attr->timeout); 487 goto err1; 488 } 489 } 490 491 return 0; 492 493 err1: 494 return -EINVAL; 495 } 496 497 /* move the qp to the reset state */ 498 static void rxe_qp_reset(struct rxe_qp *qp) 499 { 500 /* stop tasks from running */ 501 rxe_disable_task(&qp->resp.task); 502 503 /* stop request/comp */ 504 if (qp->sq.queue) { 505 if (qp_type(qp) == IB_QPT_RC) 506 rxe_disable_task(&qp->comp.task); 507 rxe_disable_task(&qp->req.task); 508 } 509 510 /* move qp to the reset state */ 511 qp->req.state = QP_STATE_RESET; 512 qp->resp.state = QP_STATE_RESET; 513 514 /* let state machines reset themselves drain work and packet queues 515 * etc. 516 */ 517 __rxe_do_task(&qp->resp.task); 518 519 if (qp->sq.queue) { 520 __rxe_do_task(&qp->comp.task); 521 __rxe_do_task(&qp->req.task); 522 rxe_queue_reset(qp->sq.queue); 523 } 524 525 /* cleanup attributes */ 526 atomic_set(&qp->ssn, 0); 527 qp->req.opcode = -1; 528 qp->req.need_retry = 0; 529 qp->req.noack_pkts = 0; 530 qp->resp.msn = 0; 531 qp->resp.opcode = -1; 532 qp->resp.drop_msg = 0; 533 qp->resp.goto_error = 0; 534 qp->resp.sent_psn_nak = 0; 535 536 if (qp->resp.mr) { 537 rxe_drop_ref(qp->resp.mr); 538 qp->resp.mr = NULL; 539 } 540 541 cleanup_rd_atomic_resources(qp); 542 543 /* reenable tasks */ 544 rxe_enable_task(&qp->resp.task); 545 546 if (qp->sq.queue) { 547 if (qp_type(qp) == IB_QPT_RC) 548 rxe_enable_task(&qp->comp.task); 549 550 rxe_enable_task(&qp->req.task); 551 } 552 } 553 554 /* drain the send queue */ 555 static void rxe_qp_drain(struct rxe_qp *qp) 556 { 557 if (qp->sq.queue) { 558 if (qp->req.state != QP_STATE_DRAINED) { 559 qp->req.state = QP_STATE_DRAIN; 560 if (qp_type(qp) == IB_QPT_RC) 561 rxe_run_task(&qp->comp.task, 1); 562 else 563 __rxe_do_task(&qp->comp.task); 564 rxe_run_task(&qp->req.task, 1); 565 } 566 } 567 } 568 569 /* move the qp to the error state */ 570 void rxe_qp_error(struct rxe_qp *qp) 571 { 572 qp->req.state = QP_STATE_ERROR; 573 qp->resp.state = QP_STATE_ERROR; 574 qp->attr.qp_state = IB_QPS_ERR; 575 576 /* drain work and packet queues */ 577 rxe_run_task(&qp->resp.task, 1); 578 579 if (qp_type(qp) == IB_QPT_RC) 580 rxe_run_task(&qp->comp.task, 1); 581 else 582 __rxe_do_task(&qp->comp.task); 583 rxe_run_task(&qp->req.task, 1); 584 } 585 586 /* called by the modify qp verb */ 587 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask, 588 struct ib_udata *udata) 589 { 590 int err; 591 592 if (mask & IB_QP_MAX_QP_RD_ATOMIC) { 593 int max_rd_atomic = attr->max_rd_atomic ? 594 roundup_pow_of_two(attr->max_rd_atomic) : 0; 595 596 qp->attr.max_rd_atomic = max_rd_atomic; 597 atomic_set(&qp->req.rd_atomic, max_rd_atomic); 598 } 599 600 if (mask & IB_QP_MAX_DEST_RD_ATOMIC) { 601 int max_dest_rd_atomic = attr->max_dest_rd_atomic ? 602 roundup_pow_of_two(attr->max_dest_rd_atomic) : 0; 603 604 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic; 605 606 free_rd_atomic_resources(qp); 607 608 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic); 609 if (err) 610 return err; 611 } 612 613 if (mask & IB_QP_CUR_STATE) 614 qp->attr.cur_qp_state = attr->qp_state; 615 616 if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY) 617 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify; 618 619 if (mask & IB_QP_ACCESS_FLAGS) 620 qp->attr.qp_access_flags = attr->qp_access_flags; 621 622 if (mask & IB_QP_PKEY_INDEX) 623 qp->attr.pkey_index = attr->pkey_index; 624 625 if (mask & IB_QP_PORT) 626 qp->attr.port_num = attr->port_num; 627 628 if (mask & IB_QP_QKEY) 629 qp->attr.qkey = attr->qkey; 630 631 if (mask & IB_QP_AV) { 632 rxe_init_av(&attr->ah_attr, &qp->pri_av); 633 } 634 635 if (mask & IB_QP_ALT_PATH) { 636 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av); 637 qp->attr.alt_port_num = attr->alt_port_num; 638 qp->attr.alt_pkey_index = attr->alt_pkey_index; 639 qp->attr.alt_timeout = attr->alt_timeout; 640 } 641 642 if (mask & IB_QP_PATH_MTU) { 643 qp->attr.path_mtu = attr->path_mtu; 644 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu); 645 } 646 647 if (mask & IB_QP_TIMEOUT) { 648 qp->attr.timeout = attr->timeout; 649 if (attr->timeout == 0) { 650 qp->qp_timeout_jiffies = 0; 651 } else { 652 /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */ 653 int j = nsecs_to_jiffies(4096ULL << attr->timeout); 654 655 qp->qp_timeout_jiffies = j ? j : 1; 656 } 657 } 658 659 if (mask & IB_QP_RETRY_CNT) { 660 qp->attr.retry_cnt = attr->retry_cnt; 661 qp->comp.retry_cnt = attr->retry_cnt; 662 pr_debug("qp#%d set retry count = %d\n", qp_num(qp), 663 attr->retry_cnt); 664 } 665 666 if (mask & IB_QP_RNR_RETRY) { 667 qp->attr.rnr_retry = attr->rnr_retry; 668 qp->comp.rnr_retry = attr->rnr_retry; 669 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp), 670 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 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp), 677 qp->resp.psn); 678 } 679 680 if (mask & IB_QP_MIN_RNR_TIMER) { 681 qp->attr.min_rnr_timer = attr->min_rnr_timer; 682 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp), 683 attr->min_rnr_timer); 684 } 685 686 if (mask & IB_QP_SQ_PSN) { 687 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK); 688 qp->req.psn = qp->attr.sq_psn; 689 qp->comp.psn = qp->attr.sq_psn; 690 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn); 691 } 692 693 if (mask & IB_QP_PATH_MIG_STATE) 694 qp->attr.path_mig_state = attr->path_mig_state; 695 696 if (mask & IB_QP_DEST_QPN) 697 qp->attr.dest_qp_num = attr->dest_qp_num; 698 699 if (mask & IB_QP_STATE) { 700 qp->attr.qp_state = attr->qp_state; 701 702 switch (attr->qp_state) { 703 case IB_QPS_RESET: 704 pr_debug("qp#%d state -> RESET\n", qp_num(qp)); 705 rxe_qp_reset(qp); 706 break; 707 708 case IB_QPS_INIT: 709 pr_debug("qp#%d state -> INIT\n", qp_num(qp)); 710 qp->req.state = QP_STATE_INIT; 711 qp->resp.state = QP_STATE_INIT; 712 break; 713 714 case IB_QPS_RTR: 715 pr_debug("qp#%d state -> RTR\n", qp_num(qp)); 716 qp->resp.state = QP_STATE_READY; 717 break; 718 719 case IB_QPS_RTS: 720 pr_debug("qp#%d state -> RTS\n", qp_num(qp)); 721 qp->req.state = QP_STATE_READY; 722 break; 723 724 case IB_QPS_SQD: 725 pr_debug("qp#%d state -> SQD\n", qp_num(qp)); 726 rxe_qp_drain(qp); 727 break; 728 729 case IB_QPS_SQE: 730 pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp)); 731 /* Not possible from modify_qp. */ 732 break; 733 734 case IB_QPS_ERR: 735 pr_debug("qp#%d state -> ERR\n", qp_num(qp)); 736 rxe_qp_error(qp); 737 break; 738 } 739 } 740 741 return 0; 742 } 743 744 /* called by the query qp verb */ 745 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask) 746 { 747 *attr = qp->attr; 748 749 attr->rq_psn = qp->resp.psn; 750 attr->sq_psn = qp->req.psn; 751 752 attr->cap.max_send_wr = qp->sq.max_wr; 753 attr->cap.max_send_sge = qp->sq.max_sge; 754 attr->cap.max_inline_data = qp->sq.max_inline; 755 756 if (!qp->srq) { 757 attr->cap.max_recv_wr = qp->rq.max_wr; 758 attr->cap.max_recv_sge = qp->rq.max_sge; 759 } 760 761 rxe_av_to_attr(&qp->pri_av, &attr->ah_attr); 762 rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr); 763 764 if (qp->req.state == QP_STATE_DRAIN) { 765 attr->sq_draining = 1; 766 /* applications that get this state 767 * typically spin on it. yield the 768 * processor 769 */ 770 cond_resched(); 771 } else { 772 attr->sq_draining = 0; 773 } 774 775 pr_debug("attr->sq_draining = %d\n", attr->sq_draining); 776 777 return 0; 778 } 779 780 /* called by the destroy qp verb */ 781 void rxe_qp_destroy(struct rxe_qp *qp) 782 { 783 qp->valid = 0; 784 qp->qp_timeout_jiffies = 0; 785 rxe_cleanup_task(&qp->resp.task); 786 787 if (qp_type(qp) == IB_QPT_RC) { 788 del_timer_sync(&qp->retrans_timer); 789 del_timer_sync(&qp->rnr_nak_timer); 790 } 791 792 rxe_cleanup_task(&qp->req.task); 793 rxe_cleanup_task(&qp->comp.task); 794 795 /* flush out any receive wr's or pending requests */ 796 __rxe_do_task(&qp->req.task); 797 if (qp->sq.queue) { 798 __rxe_do_task(&qp->comp.task); 799 __rxe_do_task(&qp->req.task); 800 } 801 } 802 803 /* called when the last reference to the qp is dropped */ 804 static void rxe_qp_do_cleanup(struct work_struct *work) 805 { 806 struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work); 807 808 rxe_drop_all_mcast_groups(qp); 809 810 if (qp->sq.queue) 811 rxe_queue_cleanup(qp->sq.queue); 812 813 if (qp->srq) 814 rxe_drop_ref(qp->srq); 815 816 if (qp->rq.queue) 817 rxe_queue_cleanup(qp->rq.queue); 818 819 if (qp->scq) 820 rxe_drop_ref(qp->scq); 821 if (qp->rcq) 822 rxe_drop_ref(qp->rcq); 823 if (qp->pd) 824 rxe_drop_ref(qp->pd); 825 826 if (qp->resp.mr) { 827 rxe_drop_ref(qp->resp.mr); 828 qp->resp.mr = NULL; 829 } 830 831 if (qp_type(qp) == IB_QPT_RC) 832 sk_dst_reset(qp->sk->sk); 833 834 free_rd_atomic_resources(qp); 835 836 kernel_sock_shutdown(qp->sk, SHUT_RDWR); 837 sock_release(qp->sk); 838 } 839 840 /* called when the last reference to the qp is dropped */ 841 void rxe_qp_cleanup(struct rxe_pool_entry *arg) 842 { 843 struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem); 844 845 execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work); 846 } 847