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                 rxe_drop_ref(qp);
 155                 kfree_skb(res->atomic.skb);
 156         } else if (res->type == RXE_READ_MASK) {
 157                 if (res->read.mr)
 158                         rxe_drop_ref(res->read.mr);
 159         }
 160         res->type = 0;
 161 }
 162
 163 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
 164 {
 165         int i;
 166         struct resp_res *res;
 167
 168         if (qp->resp.resources) {
 169                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 170                         res = &qp->resp.resources[i];
 171                         free_rd_atomic_resource(qp, res);
 172                 }
 173         }
 174 }
 175
 176 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
 177                              struct ib_qp_init_attr *init)
 178 {
 179         struct rxe_port *port;
 180         u32 qpn;
 181
 182         qp->sq_sig_type         = init->sq_sig_type;
 183         qp->attr.path_mtu       = 1;
 184         qp->mtu                 = ib_mtu_enum_to_int(qp->attr.path_mtu);
 185
 186         qpn                     = qp->pelem.index;
 187         port                    = &rxe->port;
 188
 189         switch (init->qp_type) {
 190         case IB_QPT_SMI:
 191                 qp->ibqp.qp_num         = 0;
 192                 port->qp_smi_index      = qpn;
 193                 qp->attr.port_num       = init->port_num;
 194                 break;
 195
 196         case IB_QPT_GSI:
 197                 qp->ibqp.qp_num         = 1;
 198                 port->qp_gsi_index      = qpn;
 199                 qp->attr.port_num       = init->port_num;
 200                 break;
 201
 202         default:
 203                 qp->ibqp.qp_num         = qpn;
 204                 break;
 205         }
 206
 207         INIT_LIST_HEAD(&qp->grp_list);
 208
 209         skb_queue_head_init(&qp->send_pkts);
 210
 211         spin_lock_init(&qp->grp_lock);
 212         spin_lock_init(&qp->state_lock);
 213
 214         atomic_set(&qp->ssn, 0);
 215         atomic_set(&qp->skb_out, 0);
 216 }
 217
 218 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 219                            struct ib_qp_init_attr *init,
 220                            struct ib_ucontext *context,
 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         qp->sq.max_wr           = init->cap.max_send_wr;
 232         qp->sq.max_sge          = init->cap.max_send_sge;
 233         qp->sq.max_inline       = init->cap.max_inline_data;
 234
 235         wqe_size = max_t(int, sizeof(struct rxe_send_wqe) +
 236                          qp->sq.max_sge * sizeof(struct ib_sge),
 237                          sizeof(struct rxe_send_wqe) +
 238                          qp->sq.max_inline);
 239
 240         qp->sq.queue = rxe_queue_init(rxe,
 241                                       &qp->sq.max_wr,
 242                                       wqe_size);
 243         if (!qp->sq.queue)
 244                 return -ENOMEM;
 245
 246         err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, context,
 247                            qp->sq.queue->buf, qp->sq.queue->buf_size,
 248                            &qp->sq.queue->ip);
 249
 250         if (err) {
 251                 vfree(qp->sq.queue->buf);
 252                 kfree(qp->sq.queue);
 253                 return err;
 254         }
 255
 256         qp->req.wqe_index       = producer_index(qp->sq.queue);
 257         qp->req.state           = QP_STATE_RESET;
 258         qp->req.opcode          = -1;
 259         qp->comp.opcode         = -1;
 260
 261         spin_lock_init(&qp->sq.sq_lock);
 262         skb_queue_head_init(&qp->req_pkts);
 263
 264         rxe_init_task(rxe, &qp->req.task, qp,
 265                       rxe_requester, "req");
 266         rxe_init_task(rxe, &qp->comp.task, qp,
 267                       rxe_completer, "comp");
 268
 269         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 270         if (init->qp_type == IB_QPT_RC) {
 271                 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
 272                 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 273         }
 274         return 0;
 275 }
 276
 277 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 278                             struct ib_qp_init_attr *init,
 279                             struct ib_ucontext *context,
 280                             struct rxe_create_qp_resp __user *uresp)
 281 {
 282         int err;
 283         int wqe_size;
 284
 285         if (!qp->srq) {
 286                 qp->rq.max_wr           = init->cap.max_recv_wr;
 287                 qp->rq.max_sge          = init->cap.max_recv_sge;
 288
 289                 wqe_size = rcv_wqe_size(qp->rq.max_sge);
 290
 291                 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
 292                          qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
 293
 294                 qp->rq.queue = rxe_queue_init(rxe,
 295                                               &qp->rq.max_wr,
 296                                               wqe_size);
 297                 if (!qp->rq.queue)
 298                         return -ENOMEM;
 299
 300                 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, context,
 301                                    qp->rq.queue->buf, qp->rq.queue->buf_size,
 302                                    &qp->rq.queue->ip);
 303                 if (err) {
 304                         vfree(qp->rq.queue->buf);
 305                         kfree(qp->rq.queue);
 306                         return err;
 307                 }
 308         }
 309
 310         spin_lock_init(&qp->rq.producer_lock);
 311         spin_lock_init(&qp->rq.consumer_lock);
 312
 313         skb_queue_head_init(&qp->resp_pkts);
 314
 315         rxe_init_task(rxe, &qp->resp.task, qp,
 316                       rxe_responder, "resp");
 317
 318         qp->resp.opcode         = OPCODE_NONE;
 319         qp->resp.msn            = 0;
 320         qp->resp.state          = QP_STATE_RESET;
 321
 322         return 0;
 323 }
 324
 325 /* called by the create qp verb */
 326 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 327                      struct ib_qp_init_attr *init,
 328                      struct rxe_create_qp_resp __user *uresp,
 329                      struct ib_pd *ibpd)
 330 {
 331         int err;
 332         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 333         struct rxe_cq *scq = to_rcq(init->send_cq);
 334         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 335         struct ib_ucontext *context = ibpd->uobject ? ibpd->uobject->context : NULL;
 336
 337         rxe_add_ref(pd);
 338         rxe_add_ref(rcq);
 339         rxe_add_ref(scq);
 340         if (srq)
 341                 rxe_add_ref(srq);
 342
 343         qp->pd                  = pd;
 344         qp->rcq                 = rcq;
 345         qp->scq                 = scq;
 346         qp->srq                 = srq;
 347
 348         rxe_qp_init_misc(rxe, qp, init);
 349
 350         err = rxe_qp_init_req(rxe, qp, init, context, uresp);
 351         if (err)
 352                 goto err1;
 353
 354         err = rxe_qp_init_resp(rxe, qp, init, context, uresp);
 355         if (err)
 356                 goto err2;
 357
 358         qp->attr.qp_state = IB_QPS_RESET;
 359         qp->valid = 1;
 360
 361         return 0;
 362
 363 err2:
 364         rxe_queue_cleanup(qp->sq.queue);
 365 err1:
 366         if (srq)
 367                 rxe_drop_ref(srq);
 368         rxe_drop_ref(scq);
 369         rxe_drop_ref(rcq);
 370         rxe_drop_ref(pd);
 371
 372         return err;
 373 }
 374
 375 /* called by the query qp verb */
 376 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 377 {
 378         init->event_handler             = qp->ibqp.event_handler;
 379         init->qp_context                = qp->ibqp.qp_context;
 380         init->send_cq                   = qp->ibqp.send_cq;
 381         init->recv_cq                   = qp->ibqp.recv_cq;
 382         init->srq                       = qp->ibqp.srq;
 383
 384         init->cap.max_send_wr           = qp->sq.max_wr;
 385         init->cap.max_send_sge          = qp->sq.max_sge;
 386         init->cap.max_inline_data       = qp->sq.max_inline;
 387
 388         if (!qp->srq) {
 389                 init->cap.max_recv_wr           = qp->rq.max_wr;
 390                 init->cap.max_recv_sge          = qp->rq.max_sge;
 391         }
 392
 393         init->sq_sig_type               = qp->sq_sig_type;
 394
 395         init->qp_type                   = qp->ibqp.qp_type;
 396         init->port_num                  = 1;
 397
 398         return 0;
 399 }
 400
 401 /* called by the modify qp verb, this routine checks all the parameters before
 402  * making any changes
 403  */
 404 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 405                     struct ib_qp_attr *attr, int mask)
 406 {
 407         enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
 408                                         attr->cur_qp_state : qp->attr.qp_state;
 409         enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
 410                                         attr->qp_state : cur_state;
 411
 412         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask,
 413                                 IB_LINK_LAYER_ETHERNET)) {
 414                 pr_warn("invalid mask or state for qp\n");
 415                 goto err1;
 416         }
 417
 418         if (mask & IB_QP_STATE) {
 419                 if (cur_state == IB_QPS_SQD) {
 420                         if (qp->req.state == QP_STATE_DRAIN &&
 421                             new_state != IB_QPS_ERR)
 422                                 goto err1;
 423                 }
 424         }
 425
 426         if (mask & IB_QP_PORT) {
 427                 if (attr->port_num != 1) {
 428                         pr_warn("invalid port %d\n", attr->port_num);
 429                         goto err1;
 430                 }
 431         }
 432
 433         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 434                 goto err1;
 435
 436         if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
 437                 goto err1;
 438
 439         if (mask & IB_QP_ALT_PATH) {
 440                 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
 441                         goto err1;
 442                 if (attr->alt_port_num != 1) {
 443                         pr_warn("invalid alt port %d\n", attr->alt_port_num);
 444                         goto err1;
 445                 }
 446                 if (attr->alt_timeout > 31) {
 447                         pr_warn("invalid QP alt timeout %d > 31\n",
 448                                 attr->alt_timeout);
 449                         goto err1;
 450                 }
 451         }
 452
 453         if (mask & IB_QP_PATH_MTU) {
 454                 struct rxe_port *port = &rxe->port;
 455
 456                 enum ib_mtu max_mtu = port->attr.max_mtu;
 457                 enum ib_mtu mtu = attr->path_mtu;
 458
 459                 if (mtu > max_mtu) {
 460                         pr_debug("invalid mtu (%d) > (%d)\n",
 461                                  ib_mtu_enum_to_int(mtu),
 462                                  ib_mtu_enum_to_int(max_mtu));
 463                         goto err1;
 464                 }
 465         }
 466
 467         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 468                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 469                         pr_warn("invalid max_rd_atomic %d > %d\n",
 470                                 attr->max_rd_atomic,
 471                                 rxe->attr.max_qp_rd_atom);
 472                         goto err1;
 473                 }
 474         }
 475
 476         if (mask & IB_QP_TIMEOUT) {
 477                 if (attr->timeout > 31) {
 478                         pr_warn("invalid QP timeout %d > 31\n",
 479                                 attr->timeout);
 480                         goto err1;
 481                 }
 482         }
 483
 484         return 0;
 485
 486 err1:
 487         return -EINVAL;
 488 }
 489
 490 /* move the qp to the reset state */
 491 static void rxe_qp_reset(struct rxe_qp *qp)
 492 {
 493         /* stop tasks from running */
 494         rxe_disable_task(&qp->resp.task);
 495
 496         /* stop request/comp */
 497         if (qp->sq.queue) {
 498                 if (qp_type(qp) == IB_QPT_RC)
 499                         rxe_disable_task(&qp->comp.task);
 500                 rxe_disable_task(&qp->req.task);
 501         }
 502
 503         /* move qp to the reset state */
 504         qp->req.state = QP_STATE_RESET;
 505         qp->resp.state = QP_STATE_RESET;
 506
 507         /* let state machines reset themselves drain work and packet queues
 508          * etc.
 509          */
 510         __rxe_do_task(&qp->resp.task);
 511
 512         if (qp->sq.queue) {
 513                 __rxe_do_task(&qp->comp.task);
 514                 __rxe_do_task(&qp->req.task);
 515                 rxe_queue_reset(qp->sq.queue);
 516         }
 517
 518         /* cleanup attributes */
 519         atomic_set(&qp->ssn, 0);
 520         qp->req.opcode = -1;
 521         qp->req.need_retry = 0;
 522         qp->req.noack_pkts = 0;
 523         qp->resp.msn = 0;
 524         qp->resp.opcode = -1;
 525         qp->resp.drop_msg = 0;
 526         qp->resp.goto_error = 0;
 527         qp->resp.sent_psn_nak = 0;
 528
 529         if (qp->resp.mr) {
 530                 rxe_drop_ref(qp->resp.mr);
 531                 qp->resp.mr = NULL;
 532         }
 533
 534         cleanup_rd_atomic_resources(qp);
 535
 536         /* reenable tasks */
 537         rxe_enable_task(&qp->resp.task);
 538
 539         if (qp->sq.queue) {
 540                 if (qp_type(qp) == IB_QPT_RC)
 541                         rxe_enable_task(&qp->comp.task);
 542
 543                 rxe_enable_task(&qp->req.task);
 544         }
 545 }
 546
 547 /* drain the send queue */
 548 static void rxe_qp_drain(struct rxe_qp *qp)
 549 {
 550         if (qp->sq.queue) {
 551                 if (qp->req.state != QP_STATE_DRAINED) {
 552                         qp->req.state = QP_STATE_DRAIN;
 553                         if (qp_type(qp) == IB_QPT_RC)
 554                                 rxe_run_task(&qp->comp.task, 1);
 555                         else
 556                                 __rxe_do_task(&qp->comp.task);
 557                         rxe_run_task(&qp->req.task, 1);
 558                 }
 559         }
 560 }
 561
 562 /* move the qp to the error state */
 563 void rxe_qp_error(struct rxe_qp *qp)
 564 {
 565         qp->req.state = QP_STATE_ERROR;
 566         qp->resp.state = QP_STATE_ERROR;
 567         qp->attr.qp_state = IB_QPS_ERR;
 568
 569         /* drain work and packet queues */
 570         rxe_run_task(&qp->resp.task, 1);
 571
 572         if (qp_type(qp) == IB_QPT_RC)
 573                 rxe_run_task(&qp->comp.task, 1);
 574         else
 575                 __rxe_do_task(&qp->comp.task);
 576         rxe_run_task(&qp->req.task, 1);
 577 }
 578
 579 /* called by the modify qp verb */
 580 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 581                      struct ib_udata *udata)
 582 {
 583         int err;
 584
 585         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 586                 int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
 587
 588                 qp->attr.max_rd_atomic = max_rd_atomic;
 589                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 590         }
 591
 592         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 593                 int max_dest_rd_atomic =
 594                         __roundup_pow_of_two(attr->max_dest_rd_atomic);
 595
 596                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 597
 598                 free_rd_atomic_resources(qp);
 599
 600                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 601                 if (err)
 602                         return err;
 603         }
 604
 605         if (mask & IB_QP_CUR_STATE)
 606                 qp->attr.cur_qp_state = attr->qp_state;
 607
 608         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 609                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 610
 611         if (mask & IB_QP_ACCESS_FLAGS)
 612                 qp->attr.qp_access_flags = attr->qp_access_flags;
 613
 614         if (mask & IB_QP_PKEY_INDEX)
 615                 qp->attr.pkey_index = attr->pkey_index;
 616
 617         if (mask & IB_QP_PORT)
 618                 qp->attr.port_num = attr->port_num;
 619
 620         if (mask & IB_QP_QKEY)
 621                 qp->attr.qkey = attr->qkey;
 622
 623         if (mask & IB_QP_AV) {
 624                 rxe_av_from_attr(attr->port_num, &qp->pri_av, &attr->ah_attr);
 625                 rxe_av_fill_ip_info(&qp->pri_av, &attr->ah_attr);
 626         }
 627
 628         if (mask & IB_QP_ALT_PATH) {
 629                 rxe_av_from_attr(attr->alt_port_num, &qp->alt_av,
 630                                  &attr->alt_ah_attr);
 631                 rxe_av_fill_ip_info(&qp->alt_av, &attr->alt_ah_attr);
 632                 qp->attr.alt_port_num = attr->alt_port_num;
 633                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 634                 qp->attr.alt_timeout = attr->alt_timeout;
 635         }
 636
 637         if (mask & IB_QP_PATH_MTU) {
 638                 qp->attr.path_mtu = attr->path_mtu;
 639                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 640         }
 641
 642         if (mask & IB_QP_TIMEOUT) {
 643                 qp->attr.timeout = attr->timeout;
 644                 if (attr->timeout == 0) {
 645                         qp->qp_timeout_jiffies = 0;
 646                 } else {
 647                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 648                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 649
 650                         qp->qp_timeout_jiffies = j ? j : 1;
 651                 }
 652         }
 653
 654         if (mask & IB_QP_RETRY_CNT) {
 655                 qp->attr.retry_cnt = attr->retry_cnt;
 656                 qp->comp.retry_cnt = attr->retry_cnt;
 657                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 658                          attr->retry_cnt);
 659         }
 660
 661         if (mask & IB_QP_RNR_RETRY) {
 662                 qp->attr.rnr_retry = attr->rnr_retry;
 663                 qp->comp.rnr_retry = attr->rnr_retry;
 664                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 665                          attr->rnr_retry);
 666         }
 667
 668         if (mask & IB_QP_RQ_PSN) {
 669                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 670                 qp->resp.psn = qp->attr.rq_psn;
 671                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 672                          qp->resp.psn);
 673         }
 674
 675         if (mask & IB_QP_MIN_RNR_TIMER) {
 676                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 677                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 678                          attr->min_rnr_timer);
 679         }
 680
 681         if (mask & IB_QP_SQ_PSN) {
 682                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 683                 qp->req.psn = qp->attr.sq_psn;
 684                 qp->comp.psn = qp->attr.sq_psn;
 685                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 686         }
 687
 688         if (mask & IB_QP_PATH_MIG_STATE)
 689                 qp->attr.path_mig_state = attr->path_mig_state;
 690
 691         if (mask & IB_QP_DEST_QPN)
 692                 qp->attr.dest_qp_num = attr->dest_qp_num;
 693
 694         if (mask & IB_QP_STATE) {
 695                 qp->attr.qp_state = attr->qp_state;
 696
 697                 switch (attr->qp_state) {
 698                 case IB_QPS_RESET:
 699                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 700                         rxe_qp_reset(qp);
 701                         break;
 702
 703                 case IB_QPS_INIT:
 704                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 705                         qp->req.state = QP_STATE_INIT;
 706                         qp->resp.state = QP_STATE_INIT;
 707                         break;
 708
 709                 case IB_QPS_RTR:
 710                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 711                         qp->resp.state = QP_STATE_READY;
 712                         break;
 713
 714                 case IB_QPS_RTS:
 715                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 716                         qp->req.state = QP_STATE_READY;
 717                         break;
 718
 719                 case IB_QPS_SQD:
 720                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 721                         rxe_qp_drain(qp);
 722                         break;
 723
 724                 case IB_QPS_SQE:
 725                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 726                         /* Not possible from modify_qp. */
 727                         break;
 728
 729                 case IB_QPS_ERR:
 730                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 731                         rxe_qp_error(qp);
 732                         break;
 733                 }
 734         }
 735
 736         return 0;
 737 }
 738
 739 /* called by the query qp verb */
 740 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 741 {
 742         *attr = qp->attr;
 743
 744         attr->rq_psn                            = qp->resp.psn;
 745         attr->sq_psn                            = qp->req.psn;
 746
 747         attr->cap.max_send_wr                   = qp->sq.max_wr;
 748         attr->cap.max_send_sge                  = qp->sq.max_sge;
 749         attr->cap.max_inline_data               = qp->sq.max_inline;
 750
 751         if (!qp->srq) {
 752                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 753                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 754         }
 755
 756         rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
 757         rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
 758
 759         if (qp->req.state == QP_STATE_DRAIN) {
 760                 attr->sq_draining = 1;
 761                 /* applications that get this state
 762                  * typically spin on it. yield the
 763                  * processor
 764                  */
 765                 cond_resched();
 766         } else {
 767                 attr->sq_draining = 0;
 768         }
 769
 770         pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
 771
 772         return 0;
 773 }
 774
 775 /* called by the destroy qp verb */
 776 void rxe_qp_destroy(struct rxe_qp *qp)
 777 {
 778         qp->valid = 0;
 779         qp->qp_timeout_jiffies = 0;
 780         rxe_cleanup_task(&qp->resp.task);
 781
 782         if (qp_type(qp) == IB_QPT_RC) {
 783                 del_timer_sync(&qp->retrans_timer);
 784                 del_timer_sync(&qp->rnr_nak_timer);
 785         }
 786
 787         rxe_cleanup_task(&qp->req.task);
 788         rxe_cleanup_task(&qp->comp.task);
 789
 790         /* flush out any receive wr's or pending requests */
 791         __rxe_do_task(&qp->req.task);
 792         if (qp->sq.queue) {
 793                 __rxe_do_task(&qp->comp.task);
 794                 __rxe_do_task(&qp->req.task);
 795         }
 796 }
 797
 798 /* called when the last reference to the qp is dropped */
 799 static void rxe_qp_do_cleanup(struct work_struct *work)
 800 {
 801         struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
 802
 803         rxe_drop_all_mcast_groups(qp);
 804
 805         if (qp->sq.queue)
 806                 rxe_queue_cleanup(qp->sq.queue);
 807
 808         if (qp->srq)
 809                 rxe_drop_ref(qp->srq);
 810
 811         if (qp->rq.queue)
 812                 rxe_queue_cleanup(qp->rq.queue);
 813
 814         if (qp->scq)
 815                 rxe_drop_ref(qp->scq);
 816         if (qp->rcq)
 817                 rxe_drop_ref(qp->rcq);
 818         if (qp->pd)
 819                 rxe_drop_ref(qp->pd);
 820
 821         if (qp->resp.mr) {
 822                 rxe_drop_ref(qp->resp.mr);
 823                 qp->resp.mr = NULL;
 824         }
 825
 826         if (qp_type(qp) == IB_QPT_RC)
 827                 sk_dst_reset(qp->sk->sk);
 828
 829         free_rd_atomic_resources(qp);
 830
 831         kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 832         sock_release(qp->sk);
 833 }
 834
 835 /* called when the last reference to the qp is dropped */
 836 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
 837 {
 838         struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
 839
 840         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 841 }