drivers/infiniband/sw/rxe/rxe_qp.c

   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
  39 #include "rxe.h"
  40 #include "rxe_loc.h"
  41 #include "rxe_queue.h"
  42 #include "rxe_task.h"
  43
  44 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
  45                           int has_srq)
  46 {
  47         if (cap->max_send_wr > rxe->attr.max_qp_wr) {
  48                 pr_warn("invalid send wr = %d > %d\n",
  49                         cap->max_send_wr, rxe->attr.max_qp_wr);
  50                 goto err1;
  51         }
  52
  53         if (cap->max_send_sge > rxe->attr.max_send_sge) {
  54                 pr_warn("invalid send sge = %d > %d\n",
  55                         cap->max_send_sge, rxe->attr.max_send_sge);
  56                 goto err1;
  57         }
  58
  59         if (!has_srq) {
  60                 if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
  61                         pr_warn("invalid recv wr = %d > %d\n",
  62                                 cap->max_recv_wr, rxe->attr.max_qp_wr);
  63                         goto err1;
  64                 }
  65
  66                 if (cap->max_recv_sge > rxe->attr.max_recv_sge) {
  67                         pr_warn("invalid recv sge = %d > %d\n",
  68                                 cap->max_recv_sge, rxe->attr.max_recv_sge);
  69                         goto err1;
  70                 }
  71         }
  72
  73         if (cap->max_inline_data > rxe->max_inline_data) {
  74                 pr_warn("invalid max inline data = %d > %d\n",
  75                         cap->max_inline_data, rxe->max_inline_data);
  76                 goto err1;
  77         }
  78
  79         return 0;
  80
  81 err1:
  82         return -EINVAL;
  83 }
  84
  85 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
  86 {
  87         struct ib_qp_cap *cap = &init->cap;
  88         struct rxe_port *port;
  89         int port_num = init->port_num;
  90
  91         if (!init->recv_cq || !init->send_cq) {
  92                 pr_warn("missing cq\n");
  93                 goto err1;
  94         }
  95
  96         if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
  97                 goto err1;
  98
  99         if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) {
 100                 if (port_num != 1) {
 101                         pr_warn("invalid port = %d\n", port_num);
 102                         goto err1;
 103                 }
 104
 105                 port = &rxe->port;
 106
 107                 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) {
 108                         pr_warn("SMI QP exists for port %d\n", port_num);
 109                         goto err1;
 110                 }
 111
 112                 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
 113                         pr_warn("GSI QP exists for port %d\n", port_num);
 114                         goto err1;
 115                 }
 116         }
 117
 118         return 0;
 119
 120 err1:
 121         return -EINVAL;
 122 }
 123
 124 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
 125 {
 126         qp->resp.res_head = 0;
 127         qp->resp.res_tail = 0;
 128         qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
 129
 130         if (!qp->resp.resources)
 131                 return -ENOMEM;
 132
 133         return 0;
 134 }
 135
 136 static void free_rd_atomic_resources(struct rxe_qp *qp)
 137 {
 138         if (qp->resp.resources) {
 139                 int i;
 140
 141                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 142                         struct resp_res *res = &qp->resp.resources[i];
 143
 144                         free_rd_atomic_resource(qp, res);
 145                 }
 146                 kfree(qp->resp.resources);
 147                 qp->resp.resources = NULL;
 148         }
 149 }
 150
 151 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res)
 152 {
 153         if (res->type == RXE_ATOMIC_MASK) {
 154                 kfree_skb(res->atomic.skb);
 155         } else if (res->type == RXE_READ_MASK) {
 156                 if (res->read.mr)
 157                         rxe_drop_ref(res->read.mr);
 158         }
 159         res->type = 0;
 160 }
 161
 162 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
 163 {
 164         int i;
 165         struct resp_res *res;
 166
 167         if (qp->resp.resources) {
 168                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 169                         res = &qp->resp.resources[i];
 170                         free_rd_atomic_resource(qp, res);
 171                 }
 172         }
 173 }
 174
 175 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
 176                              struct ib_qp_init_attr *init)
 177 {
 178         struct rxe_port *port;
 179         u32 qpn;
 180
 181         qp->sq_sig_type         = init->sq_sig_type;
 182         qp->attr.path_mtu       = 1;
 183         qp->mtu                 = ib_mtu_enum_to_int(qp->attr.path_mtu);
 184
 185         qpn                     = qp->pelem.index;
 186         port                    = &rxe->port;
 187
 188         switch (init->qp_type) {
 189         case IB_QPT_SMI:
 190                 qp->ibqp.qp_num         = 0;
 191                 port->qp_smi_index      = qpn;
 192                 qp->attr.port_num       = init->port_num;
 193                 break;
 194
 195         case IB_QPT_GSI:
 196                 qp->ibqp.qp_num         = 1;
 197                 port->qp_gsi_index      = qpn;
 198                 qp->attr.port_num       = init->port_num;
 199                 break;
 200
 201         default:
 202                 qp->ibqp.qp_num         = qpn;
 203                 break;
 204         }
 205
 206         INIT_LIST_HEAD(&qp->grp_list);
 207
 208         skb_queue_head_init(&qp->send_pkts);
 209
 210         spin_lock_init(&qp->grp_lock);
 211         spin_lock_init(&qp->state_lock);
 212
 213         spin_lock_init(&qp->req.task.state_lock);
 214         spin_lock_init(&qp->resp.task.state_lock);
 215         spin_lock_init(&qp->comp.task.state_lock);
 216
 217         spin_lock_init(&qp->sq.sq_lock);
 218         spin_lock_init(&qp->rq.producer_lock);
 219         spin_lock_init(&qp->rq.consumer_lock);
 220
 221         atomic_set(&qp->ssn, 0);
 222         atomic_set(&qp->skb_out, 0);
 223 }
 224
 225 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 226                            struct ib_qp_init_attr *init,
 227                            struct ib_ucontext *context,
 228                            struct rxe_create_qp_resp __user *uresp)
 229 {
 230         int err;
 231         int wqe_size;
 232
 233         err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
 234         if (err < 0)
 235                 return err;
 236         qp->sk->sk->sk_user_data = qp;
 237
 238         qp->sq.max_wr           = init->cap.max_send_wr;
 239         qp->sq.max_sge          = init->cap.max_send_sge;
 240         qp->sq.max_inline       = init->cap.max_inline_data;
 241
 242         wqe_size = max_t(int, sizeof(struct rxe_send_wqe) +
 243                          qp->sq.max_sge * sizeof(struct ib_sge),
 244                          sizeof(struct rxe_send_wqe) +
 245                          qp->sq.max_inline);
 246
 247         qp->sq.queue = rxe_queue_init(rxe,
 248                                       &qp->sq.max_wr,
 249                                       wqe_size);
 250         if (!qp->sq.queue)
 251                 return -ENOMEM;
 252
 253         err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, context,
 254                            qp->sq.queue->buf, qp->sq.queue->buf_size,
 255                            &qp->sq.queue->ip);
 256
 257         if (err) {
 258                 vfree(qp->sq.queue->buf);
 259                 kfree(qp->sq.queue);
 260                 qp->sq.queue = NULL;
 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         skb_queue_head_init(&qp->req_pkts);
 270
 271         rxe_init_task(rxe, &qp->req.task, qp,
 272                       rxe_requester, "req");
 273         rxe_init_task(rxe, &qp->comp.task, qp,
 274                       rxe_completer, "comp");
 275
 276         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 277         if (init->qp_type == IB_QPT_RC) {
 278                 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
 279                 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 280         }
 281         return 0;
 282 }
 283
 284 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 285                             struct ib_qp_init_attr *init,
 286                             struct ib_ucontext *context,
 287                             struct rxe_create_qp_resp __user *uresp)
 288 {
 289         int err;
 290         int wqe_size;
 291
 292         if (!qp->srq) {
 293                 qp->rq.max_wr           = init->cap.max_recv_wr;
 294                 qp->rq.max_sge          = init->cap.max_recv_sge;
 295
 296                 wqe_size = rcv_wqe_size(qp->rq.max_sge);
 297
 298                 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
 299                          qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
 300
 301                 qp->rq.queue = rxe_queue_init(rxe,
 302                                               &qp->rq.max_wr,
 303                                               wqe_size);
 304                 if (!qp->rq.queue)
 305                         return -ENOMEM;
 306
 307                 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, context,
 308                                    qp->rq.queue->buf, qp->rq.queue->buf_size,
 309                                    &qp->rq.queue->ip);
 310                 if (err) {
 311                         vfree(qp->rq.queue->buf);
 312                         kfree(qp->rq.queue);
 313                         qp->rq.queue = NULL;
 314                         return err;
 315                 }
 316         }
 317
 318         skb_queue_head_init(&qp->resp_pkts);
 319
 320         rxe_init_task(rxe, &qp->resp.task, qp,
 321                       rxe_responder, "resp");
 322
 323         qp->resp.opcode         = OPCODE_NONE;
 324         qp->resp.msn            = 0;
 325         qp->resp.state          = QP_STATE_RESET;
 326
 327         return 0;
 328 }
 329
 330 /* called by the create qp verb */
 331 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 332                      struct ib_qp_init_attr *init,
 333                      struct rxe_create_qp_resp __user *uresp,
 334                      struct ib_pd *ibpd)
 335 {
 336         int err;
 337         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 338         struct rxe_cq *scq = to_rcq(init->send_cq);
 339         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 340         struct ib_ucontext *context = ibpd->uobject ? ibpd->uobject->context : NULL;
 341
 342         rxe_add_ref(pd);
 343         rxe_add_ref(rcq);
 344         rxe_add_ref(scq);
 345         if (srq)
 346                 rxe_add_ref(srq);
 347
 348         qp->pd                  = pd;
 349         qp->rcq                 = rcq;
 350         qp->scq                 = scq;
 351         qp->srq                 = srq;
 352
 353         rxe_qp_init_misc(rxe, qp, init);
 354
 355         err = rxe_qp_init_req(rxe, qp, init, context, uresp);
 356         if (err)
 357                 goto err1;
 358
 359         err = rxe_qp_init_resp(rxe, qp, init, context, uresp);
 360         if (err)
 361                 goto err2;
 362
 363         qp->attr.qp_state = IB_QPS_RESET;
 364         qp->valid = 1;
 365
 366         return 0;
 367
 368 err2:
 369         rxe_queue_cleanup(qp->sq.queue);
 370 err1:
 371         qp->pd = NULL;
 372         qp->rcq = NULL;
 373         qp->scq = NULL;
 374         qp->srq = NULL;
 375
 376         if (srq)
 377                 rxe_drop_ref(srq);
 378         rxe_drop_ref(scq);
 379         rxe_drop_ref(rcq);
 380         rxe_drop_ref(pd);
 381
 382         return err;
 383 }
 384
 385 /* called by the query qp verb */
 386 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 387 {
 388         init->event_handler             = qp->ibqp.event_handler;
 389         init->qp_context                = qp->ibqp.qp_context;
 390         init->send_cq                   = qp->ibqp.send_cq;
 391         init->recv_cq                   = qp->ibqp.recv_cq;
 392         init->srq                       = qp->ibqp.srq;
 393
 394         init->cap.max_send_wr           = qp->sq.max_wr;
 395         init->cap.max_send_sge          = qp->sq.max_sge;
 396         init->cap.max_inline_data       = qp->sq.max_inline;
 397
 398         if (!qp->srq) {
 399                 init->cap.max_recv_wr           = qp->rq.max_wr;
 400                 init->cap.max_recv_sge          = qp->rq.max_sge;
 401         }
 402
 403         init->sq_sig_type               = qp->sq_sig_type;
 404
 405         init->qp_type                   = qp->ibqp.qp_type;
 406         init->port_num                  = 1;
 407
 408         return 0;
 409 }
 410
 411 /* called by the modify qp verb, this routine checks all the parameters before
 412  * making any changes
 413  */
 414 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 415                     struct ib_qp_attr *attr, int mask)
 416 {
 417         enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
 418                                         attr->cur_qp_state : qp->attr.qp_state;
 419         enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
 420                                         attr->qp_state : cur_state;
 421
 422         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask,
 423                                 IB_LINK_LAYER_ETHERNET)) {
 424                 pr_warn("invalid mask or state for qp\n");
 425                 goto err1;
 426         }
 427
 428         if (mask & IB_QP_STATE) {
 429                 if (cur_state == IB_QPS_SQD) {
 430                         if (qp->req.state == QP_STATE_DRAIN &&
 431                             new_state != IB_QPS_ERR)
 432                                 goto err1;
 433                 }
 434         }
 435
 436         if (mask & IB_QP_PORT) {
 437                 if (attr->port_num != 1) {
 438                         pr_warn("invalid port %d\n", attr->port_num);
 439                         goto err1;
 440                 }
 441         }
 442
 443         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 444                 goto err1;
 445
 446         if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
 447                 goto err1;
 448
 449         if (mask & IB_QP_ALT_PATH) {
 450                 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
 451                         goto err1;
 452                 if (attr->alt_port_num != 1) {
 453                         pr_warn("invalid alt port %d\n", attr->alt_port_num);
 454                         goto err1;
 455                 }
 456                 if (attr->alt_timeout > 31) {
 457                         pr_warn("invalid QP alt timeout %d > 31\n",
 458                                 attr->alt_timeout);
 459                         goto err1;
 460                 }
 461         }
 462
 463         if (mask & IB_QP_PATH_MTU) {
 464                 struct rxe_port *port = &rxe->port;
 465
 466                 enum ib_mtu max_mtu = port->attr.max_mtu;
 467                 enum ib_mtu mtu = attr->path_mtu;
 468
 469                 if (mtu > max_mtu) {
 470                         pr_debug("invalid mtu (%d) > (%d)\n",
 471                                  ib_mtu_enum_to_int(mtu),
 472                                  ib_mtu_enum_to_int(max_mtu));
 473                         goto err1;
 474                 }
 475         }
 476
 477         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 478                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 479                         pr_warn("invalid max_rd_atomic %d > %d\n",
 480                                 attr->max_rd_atomic,
 481                                 rxe->attr.max_qp_rd_atom);
 482                         goto err1;
 483                 }
 484         }
 485
 486         if (mask & IB_QP_TIMEOUT) {
 487                 if (attr->timeout > 31) {
 488                         pr_warn("invalid QP timeout %d > 31\n",
 489                                 attr->timeout);
 490                         goto err1;
 491                 }
 492         }
 493
 494         return 0;
 495
 496 err1:
 497         return -EINVAL;
 498 }
 499
 500 /* move the qp to the reset state */
 501 static void rxe_qp_reset(struct rxe_qp *qp)
 502 {
 503         /* stop tasks from running */
 504         rxe_disable_task(&qp->resp.task);
 505
 506         /* stop request/comp */
 507         if (qp->sq.queue) {
 508                 if (qp_type(qp) == IB_QPT_RC)
 509                         rxe_disable_task(&qp->comp.task);
 510                 rxe_disable_task(&qp->req.task);
 511         }
 512
 513         /* move qp to the reset state */
 514         qp->req.state = QP_STATE_RESET;
 515         qp->resp.state = QP_STATE_RESET;
 516
 517         /* let state machines reset themselves drain work and packet queues
 518          * etc.
 519          */
 520         __rxe_do_task(&qp->resp.task);
 521
 522         if (qp->sq.queue) {
 523                 __rxe_do_task(&qp->comp.task);
 524                 __rxe_do_task(&qp->req.task);
 525                 rxe_queue_reset(qp->sq.queue);
 526         }
 527
 528         /* cleanup attributes */
 529         atomic_set(&qp->ssn, 0);
 530         qp->req.opcode = -1;
 531         qp->req.need_retry = 0;
 532         qp->req.noack_pkts = 0;
 533         qp->resp.msn = 0;
 534         qp->resp.opcode = -1;
 535         qp->resp.drop_msg = 0;
 536         qp->resp.goto_error = 0;
 537         qp->resp.sent_psn_nak = 0;
 538
 539         if (qp->resp.mr) {
 540                 rxe_drop_ref(qp->resp.mr);
 541                 qp->resp.mr = NULL;
 542         }
 543
 544         cleanup_rd_atomic_resources(qp);
 545
 546         /* reenable tasks */
 547         rxe_enable_task(&qp->resp.task);
 548
 549         if (qp->sq.queue) {
 550                 if (qp_type(qp) == IB_QPT_RC)
 551                         rxe_enable_task(&qp->comp.task);
 552
 553                 rxe_enable_task(&qp->req.task);
 554         }
 555 }
 556
 557 /* drain the send queue */
 558 static void rxe_qp_drain(struct rxe_qp *qp)
 559 {
 560         if (qp->sq.queue) {
 561                 if (qp->req.state != QP_STATE_DRAINED) {
 562                         qp->req.state = QP_STATE_DRAIN;
 563                         if (qp_type(qp) == IB_QPT_RC)
 564                                 rxe_run_task(&qp->comp.task, 1);
 565                         else
 566                                 __rxe_do_task(&qp->comp.task);
 567                         rxe_run_task(&qp->req.task, 1);
 568                 }
 569         }
 570 }
 571
 572 /* move the qp to the error state */
 573 void rxe_qp_error(struct rxe_qp *qp)
 574 {
 575         qp->req.state = QP_STATE_ERROR;
 576         qp->resp.state = QP_STATE_ERROR;
 577         qp->attr.qp_state = IB_QPS_ERR;
 578
 579         /* drain work and packet queues */
 580         rxe_run_task(&qp->resp.task, 1);
 581
 582         if (qp_type(qp) == IB_QPT_RC)
 583                 rxe_run_task(&qp->comp.task, 1);
 584         else
 585                 __rxe_do_task(&qp->comp.task);
 586         rxe_run_task(&qp->req.task, 1);
 587 }
 588
 589 /* called by the modify qp verb */
 590 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 591                      struct ib_udata *udata)
 592 {
 593         int err;
 594
 595         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 596                 int max_rd_atomic = attr->max_rd_atomic ?
 597                         roundup_pow_of_two(attr->max_rd_atomic) : 0;
 598
 599                 qp->attr.max_rd_atomic = max_rd_atomic;
 600                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 601         }
 602
 603         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 604                 int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
 605                         roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
 606
 607                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 608
 609                 free_rd_atomic_resources(qp);
 610
 611                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 612                 if (err)
 613                         return err;
 614         }
 615
 616         if (mask & IB_QP_CUR_STATE)
 617                 qp->attr.cur_qp_state = attr->qp_state;
 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_av_from_attr(attr->port_num, &qp->pri_av, &attr->ah_attr);
 636                 rxe_av_fill_ip_info(&qp->pri_av, &attr->ah_attr);
 637         }
 638
 639         if (mask & IB_QP_ALT_PATH) {
 640                 rxe_av_from_attr(attr->alt_port_num, &qp->alt_av,
 641                                  &attr->alt_ah_attr);
 642                 rxe_av_fill_ip_info(&qp->alt_av, &attr->alt_ah_attr);
 643                 qp->attr.alt_port_num = attr->alt_port_num;
 644                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 645                 qp->attr.alt_timeout = attr->alt_timeout;
 646         }
 647
 648         if (mask & IB_QP_PATH_MTU) {
 649                 qp->attr.path_mtu = attr->path_mtu;
 650                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 651         }
 652
 653         if (mask & IB_QP_TIMEOUT) {
 654                 qp->attr.timeout = attr->timeout;
 655                 if (attr->timeout == 0) {
 656                         qp->qp_timeout_jiffies = 0;
 657                 } else {
 658                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 659                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 660
 661                         qp->qp_timeout_jiffies = j ? j : 1;
 662                 }
 663         }
 664
 665         if (mask & IB_QP_RETRY_CNT) {
 666                 qp->attr.retry_cnt = attr->retry_cnt;
 667                 qp->comp.retry_cnt = attr->retry_cnt;
 668                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 669                          attr->retry_cnt);
 670         }
 671
 672         if (mask & IB_QP_RNR_RETRY) {
 673                 qp->attr.rnr_retry = attr->rnr_retry;
 674                 qp->comp.rnr_retry = attr->rnr_retry;
 675                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 676                          attr->rnr_retry);
 677         }
 678
 679         if (mask & IB_QP_RQ_PSN) {
 680                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 681                 qp->resp.psn = qp->attr.rq_psn;
 682                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 683                          qp->resp.psn);
 684         }
 685
 686         if (mask & IB_QP_MIN_RNR_TIMER) {
 687                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 688                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 689                          attr->min_rnr_timer);
 690         }
 691
 692         if (mask & IB_QP_SQ_PSN) {
 693                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 694                 qp->req.psn = qp->attr.sq_psn;
 695                 qp->comp.psn = qp->attr.sq_psn;
 696                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 697         }
 698
 699         if (mask & IB_QP_PATH_MIG_STATE)
 700                 qp->attr.path_mig_state = attr->path_mig_state;
 701
 702         if (mask & IB_QP_DEST_QPN)
 703                 qp->attr.dest_qp_num = attr->dest_qp_num;
 704
 705         if (mask & IB_QP_STATE) {
 706                 qp->attr.qp_state = attr->qp_state;
 707
 708                 switch (attr->qp_state) {
 709                 case IB_QPS_RESET:
 710                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 711                         rxe_qp_reset(qp);
 712                         break;
 713
 714                 case IB_QPS_INIT:
 715                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 716                         qp->req.state = QP_STATE_INIT;
 717                         qp->resp.state = QP_STATE_INIT;
 718                         break;
 719
 720                 case IB_QPS_RTR:
 721                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 722                         qp->resp.state = QP_STATE_READY;
 723                         break;
 724
 725                 case IB_QPS_RTS:
 726                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 727                         qp->req.state = QP_STATE_READY;
 728                         break;
 729
 730                 case IB_QPS_SQD:
 731                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 732                         rxe_qp_drain(qp);
 733                         break;
 734
 735                 case IB_QPS_SQE:
 736                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 737                         /* Not possible from modify_qp. */
 738                         break;
 739
 740                 case IB_QPS_ERR:
 741                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 742                         rxe_qp_error(qp);
 743                         break;
 744                 }
 745         }
 746
 747         return 0;
 748 }
 749
 750 /* called by the query qp verb */
 751 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 752 {
 753         *attr = qp->attr;
 754
 755         attr->rq_psn                            = qp->resp.psn;
 756         attr->sq_psn                            = qp->req.psn;
 757
 758         attr->cap.max_send_wr                   = qp->sq.max_wr;
 759         attr->cap.max_send_sge                  = qp->sq.max_sge;
 760         attr->cap.max_inline_data               = qp->sq.max_inline;
 761
 762         if (!qp->srq) {
 763                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 764                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 765         }
 766
 767         rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
 768         rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
 769
 770         if (qp->req.state == QP_STATE_DRAIN) {
 771                 attr->sq_draining = 1;
 772                 /* applications that get this state
 773                  * typically spin on it. yield the
 774                  * processor
 775                  */
 776                 cond_resched();
 777         } else {
 778                 attr->sq_draining = 0;
 779         }
 780
 781         pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
 782
 783         return 0;
 784 }
 785
 786 /* called by the destroy qp verb */
 787 void rxe_qp_destroy(struct rxe_qp *qp)
 788 {
 789         qp->valid = 0;
 790         qp->qp_timeout_jiffies = 0;
 791         rxe_cleanup_task(&qp->resp.task);
 792
 793         if (qp_type(qp) == IB_QPT_RC) {
 794                 del_timer_sync(&qp->retrans_timer);
 795                 del_timer_sync(&qp->rnr_nak_timer);
 796         }
 797
 798         rxe_cleanup_task(&qp->req.task);
 799         rxe_cleanup_task(&qp->comp.task);
 800
 801         /* flush out any receive wr's or pending requests */
 802         if (qp->req.task.func)
 803                 __rxe_do_task(&qp->req.task);
 804
 805         if (qp->sq.queue) {
 806                 __rxe_do_task(&qp->comp.task);
 807                 __rxe_do_task(&qp->req.task);
 808         }
 809 }
 810
 811 /* called when the last reference to the qp is dropped */
 812 static void rxe_qp_do_cleanup(struct work_struct *work)
 813 {
 814         struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
 815
 816         rxe_drop_all_mcast_groups(qp);
 817
 818         if (qp->sq.queue)
 819                 rxe_queue_cleanup(qp->sq.queue);
 820
 821         if (qp->srq)
 822                 rxe_drop_ref(qp->srq);
 823
 824         if (qp->rq.queue)
 825                 rxe_queue_cleanup(qp->rq.queue);
 826
 827         if (qp->scq)
 828                 rxe_drop_ref(qp->scq);
 829         if (qp->rcq)
 830                 rxe_drop_ref(qp->rcq);
 831         if (qp->pd)
 832                 rxe_drop_ref(qp->pd);
 833
 834         if (qp->resp.mr) {
 835                 rxe_drop_ref(qp->resp.mr);
 836                 qp->resp.mr = NULL;
 837         }
 838
 839         free_rd_atomic_resources(qp);
 840
 841         if (qp->sk) {
 842                 if (qp_type(qp) == IB_QPT_RC)
 843                         sk_dst_reset(qp->sk->sk);
 844
 845                 kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 846                 sock_release(qp->sk);
 847         }
 848 }
 849
 850 /* called when the last reference to the qp is dropped */
 851 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
 852 {
 853         struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
 854
 855         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 856 }