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 char *rxe_qp_state_name[] = {
  45         [QP_STATE_RESET]        = "RESET",
  46         [QP_STATE_INIT]         = "INIT",
  47         [QP_STATE_READY]        = "READY",
  48         [QP_STATE_DRAIN]        = "DRAIN",
  49         [QP_STATE_DRAINED]      = "DRAINED",
  50         [QP_STATE_ERROR]        = "ERROR",
  51 };
  52
  53 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
  54                           int has_srq)
  55 {
  56         if (cap->max_send_wr > rxe->attr.max_qp_wr) {
  57                 pr_warn("invalid send wr = %d > %d\n",
  58                         cap->max_send_wr, rxe->attr.max_qp_wr);
  59                 goto err1;
  60         }
  61
  62         if (cap->max_send_sge > rxe->attr.max_sge) {
  63                 pr_warn("invalid send sge = %d > %d\n",
  64                         cap->max_send_sge, rxe->attr.max_sge);
  65                 goto err1;
  66         }
  67
  68         if (!has_srq) {
  69                 if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
  70                         pr_warn("invalid recv wr = %d > %d\n",
  71                                 cap->max_recv_wr, rxe->attr.max_qp_wr);
  72                         goto err1;
  73                 }
  74
  75                 if (cap->max_recv_sge > rxe->attr.max_sge) {
  76                         pr_warn("invalid recv sge = %d > %d\n",
  77                                 cap->max_recv_sge, rxe->attr.max_sge);
  78                         goto err1;
  79                 }
  80         }
  81
  82         if (cap->max_inline_data > rxe->max_inline_data) {
  83                 pr_warn("invalid max inline data = %d > %d\n",
  84                         cap->max_inline_data, rxe->max_inline_data);
  85                 goto err1;
  86         }
  87
  88         return 0;
  89
  90 err1:
  91         return -EINVAL;
  92 }
  93
  94 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
  95 {
  96         struct ib_qp_cap *cap = &init->cap;
  97         struct rxe_port *port;
  98         int port_num = init->port_num;
  99
 100         if (!init->recv_cq || !init->send_cq) {
 101                 pr_warn("missing cq\n");
 102                 goto err1;
 103         }
 104
 105         if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
 106                 goto err1;
 107
 108         if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) {
 109                 if (port_num != 1) {
 110                         pr_warn("invalid port = %d\n", port_num);
 111                         goto err1;
 112                 }
 113
 114                 port = &rxe->port;
 115
 116                 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) {
 117                         pr_warn("SMI QP exists for port %d\n", port_num);
 118                         goto err1;
 119                 }
 120
 121                 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
 122                         pr_warn("GSI QP exists for port %d\n", port_num);
 123                         goto err1;
 124                 }
 125         }
 126
 127         return 0;
 128
 129 err1:
 130         return -EINVAL;
 131 }
 132
 133 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
 134 {
 135         qp->resp.res_head = 0;
 136         qp->resp.res_tail = 0;
 137         qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
 138
 139         if (!qp->resp.resources)
 140                 return -ENOMEM;
 141
 142         return 0;
 143 }
 144
 145 static void free_rd_atomic_resources(struct rxe_qp *qp)
 146 {
 147         if (qp->resp.resources) {
 148                 int i;
 149
 150                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 151                         struct resp_res *res = &qp->resp.resources[i];
 152
 153                         free_rd_atomic_resource(qp, res);
 154                 }
 155                 kfree(qp->resp.resources);
 156                 qp->resp.resources = NULL;
 157         }
 158 }
 159
 160 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res)
 161 {
 162         if (res->type == RXE_ATOMIC_MASK) {
 163                 rxe_drop_ref(qp);
 164                 kfree_skb(res->atomic.skb);
 165         } else if (res->type == RXE_READ_MASK) {
 166                 if (res->read.mr)
 167                         rxe_drop_ref(res->read.mr);
 168         }
 169         res->type = 0;
 170 }
 171
 172 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
 173 {
 174         int i;
 175         struct resp_res *res;
 176
 177         if (qp->resp.resources) {
 178                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 179                         res = &qp->resp.resources[i];
 180                         free_rd_atomic_resource(qp, res);
 181                 }
 182         }
 183 }
 184
 185 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
 186                              struct ib_qp_init_attr *init)
 187 {
 188         struct rxe_port *port;
 189         u32 qpn;
 190
 191         qp->sq_sig_type         = init->sq_sig_type;
 192         qp->attr.path_mtu       = 1;
 193         qp->mtu                 = ib_mtu_enum_to_int(qp->attr.path_mtu);
 194
 195         qpn                     = qp->pelem.index;
 196         port                    = &rxe->port;
 197
 198         switch (init->qp_type) {
 199         case IB_QPT_SMI:
 200                 qp->ibqp.qp_num         = 0;
 201                 port->qp_smi_index      = qpn;
 202                 qp->attr.port_num       = init->port_num;
 203                 break;
 204
 205         case IB_QPT_GSI:
 206                 qp->ibqp.qp_num         = 1;
 207                 port->qp_gsi_index      = qpn;
 208                 qp->attr.port_num       = init->port_num;
 209                 break;
 210
 211         default:
 212                 qp->ibqp.qp_num         = qpn;
 213                 break;
 214         }
 215
 216         INIT_LIST_HEAD(&qp->grp_list);
 217
 218         skb_queue_head_init(&qp->send_pkts);
 219
 220         spin_lock_init(&qp->grp_lock);
 221         spin_lock_init(&qp->state_lock);
 222
 223         atomic_set(&qp->ssn, 0);
 224         atomic_set(&qp->skb_out, 0);
 225 }
 226
 227 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 228                            struct ib_qp_init_attr *init,
 229                            struct ib_ucontext *context, struct ib_udata *udata)
 230 {
 231         int err;
 232         int wqe_size;
 233
 234         err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
 235         if (err < 0)
 236                 return err;
 237         qp->sk->sk->sk_user_data = qp;
 238
 239         qp->sq.max_wr           = init->cap.max_send_wr;
 240         qp->sq.max_sge          = init->cap.max_send_sge;
 241         qp->sq.max_inline       = init->cap.max_inline_data;
 242
 243         wqe_size = max_t(int, sizeof(struct rxe_send_wqe) +
 244                          qp->sq.max_sge * sizeof(struct ib_sge),
 245                          sizeof(struct rxe_send_wqe) +
 246                          qp->sq.max_inline);
 247
 248         qp->sq.queue = rxe_queue_init(rxe,
 249                                       &qp->sq.max_wr,
 250                                       wqe_size);
 251         if (!qp->sq.queue)
 252                 return -ENOMEM;
 253
 254         err = do_mmap_info(rxe, udata, true,
 255                            context, qp->sq.queue->buf,
 256                            qp->sq.queue->buf_size, &qp->sq.queue->ip);
 257
 258         if (err) {
 259                 vfree(qp->sq.queue->buf);
 260                 kfree(qp->sq.queue);
 261                 qp->sq.queue = NULL;
 262                 return err;
 263         }
 264
 265         qp->req.wqe_index       = producer_index(qp->sq.queue);
 266         qp->req.state           = QP_STATE_RESET;
 267         qp->req.opcode          = -1;
 268         qp->comp.opcode         = -1;
 269
 270         spin_lock_init(&qp->sq.sq_lock);
 271         skb_queue_head_init(&qp->req_pkts);
 272
 273         rxe_init_task(rxe, &qp->req.task, qp,
 274                       rxe_requester, "req");
 275         rxe_init_task(rxe, &qp->comp.task, qp,
 276                       rxe_completer, "comp");
 277
 278         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 279         if (init->qp_type == IB_QPT_RC) {
 280                 setup_timer(&qp->rnr_nak_timer, rnr_nak_timer, (unsigned long)qp);
 281                 setup_timer(&qp->retrans_timer, retransmit_timer, (unsigned long)qp);
 282         }
 283         return 0;
 284 }
 285
 286 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 287                             struct ib_qp_init_attr *init,
 288                             struct ib_ucontext *context, struct ib_udata *udata)
 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, udata, false, context,
 309                                    qp->rq.queue->buf,
 310                                    qp->rq.queue->buf_size,
 311                                    &qp->rq.queue->ip);
 312                 if (err) {
 313                         vfree(qp->rq.queue->buf);
 314                         kfree(qp->rq.queue);
 315                         qp->rq.queue = NULL;
 316                         return err;
 317                 }
 318         }
 319
 320         spin_lock_init(&qp->rq.producer_lock);
 321         spin_lock_init(&qp->rq.consumer_lock);
 322
 323         skb_queue_head_init(&qp->resp_pkts);
 324
 325         rxe_init_task(rxe, &qp->resp.task, qp,
 326                       rxe_responder, "resp");
 327
 328         qp->resp.opcode         = OPCODE_NONE;
 329         qp->resp.msn            = 0;
 330         qp->resp.state          = QP_STATE_RESET;
 331
 332         return 0;
 333 }
 334
 335 /* called by the create qp verb */
 336 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 337                      struct ib_qp_init_attr *init, struct ib_udata *udata,
 338                      struct ib_pd *ibpd)
 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         struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
 345
 346         rxe_add_ref(pd);
 347         rxe_add_ref(rcq);
 348         rxe_add_ref(scq);
 349         if (srq)
 350                 rxe_add_ref(srq);
 351
 352         qp->pd                  = pd;
 353         qp->rcq                 = rcq;
 354         qp->scq                 = scq;
 355         qp->srq                 = srq;
 356
 357         rxe_qp_init_misc(rxe, qp, init);
 358
 359         err = rxe_qp_init_req(rxe, qp, init, context, udata);
 360         if (err)
 361                 goto err1;
 362
 363         err = rxe_qp_init_resp(rxe, qp, init, context, udata);
 364         if (err)
 365                 goto err2;
 366
 367         qp->attr.qp_state = IB_QPS_RESET;
 368         qp->valid = 1;
 369
 370         return 0;
 371
 372 err2:
 373         rxe_queue_cleanup(qp->sq.queue);
 374 err1:
 375         qp->pd = NULL;
 376         qp->rcq = NULL;
 377         qp->scq = NULL;
 378         qp->srq = NULL;
 379
 380         if (srq)
 381                 rxe_drop_ref(srq);
 382         rxe_drop_ref(scq);
 383         rxe_drop_ref(rcq);
 384         rxe_drop_ref(pd);
 385
 386         return err;
 387 }
 388
 389 /* called by the query qp verb */
 390 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 391 {
 392         init->event_handler             = qp->ibqp.event_handler;
 393         init->qp_context                = qp->ibqp.qp_context;
 394         init->send_cq                   = qp->ibqp.send_cq;
 395         init->recv_cq                   = qp->ibqp.recv_cq;
 396         init->srq                       = qp->ibqp.srq;
 397
 398         init->cap.max_send_wr           = qp->sq.max_wr;
 399         init->cap.max_send_sge          = qp->sq.max_sge;
 400         init->cap.max_inline_data       = qp->sq.max_inline;
 401
 402         if (!qp->srq) {
 403                 init->cap.max_recv_wr           = qp->rq.max_wr;
 404                 init->cap.max_recv_sge          = qp->rq.max_sge;
 405         }
 406
 407         init->sq_sig_type               = qp->sq_sig_type;
 408
 409         init->qp_type                   = qp->ibqp.qp_type;
 410         init->port_num                  = 1;
 411
 412         return 0;
 413 }
 414
 415 /* called by the modify qp verb, this routine checks all the parameters before
 416  * making any changes
 417  */
 418 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 419                     struct ib_qp_attr *attr, int mask)
 420 {
 421         enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
 422                                         attr->cur_qp_state : qp->attr.qp_state;
 423         enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
 424                                         attr->qp_state : cur_state;
 425
 426         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask,
 427                                 IB_LINK_LAYER_ETHERNET)) {
 428                 pr_warn("invalid mask or state for qp\n");
 429                 goto err1;
 430         }
 431
 432         if (mask & IB_QP_STATE) {
 433                 if (cur_state == IB_QPS_SQD) {
 434                         if (qp->req.state == QP_STATE_DRAIN &&
 435                             new_state != IB_QPS_ERR)
 436                                 goto err1;
 437                 }
 438         }
 439
 440         if (mask & IB_QP_PORT) {
 441                 if (attr->port_num != 1) {
 442                         pr_warn("invalid port %d\n", attr->port_num);
 443                         goto err1;
 444                 }
 445         }
 446
 447         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 448                 goto err1;
 449
 450         if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
 451                 goto err1;
 452
 453         if (mask & IB_QP_ALT_PATH) {
 454                 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
 455                         goto err1;
 456                 if (attr->alt_port_num != 1) {
 457                         pr_warn("invalid alt port %d\n", attr->alt_port_num);
 458                         goto err1;
 459                 }
 460                 if (attr->alt_timeout > 31) {
 461                         pr_warn("invalid QP alt timeout %d > 31\n",
 462                                 attr->alt_timeout);
 463                         goto err1;
 464                 }
 465         }
 466
 467         if (mask & IB_QP_PATH_MTU) {
 468                 struct rxe_port *port = &rxe->port;
 469
 470                 enum ib_mtu max_mtu = port->attr.max_mtu;
 471                 enum ib_mtu mtu = attr->path_mtu;
 472
 473                 if (mtu > max_mtu) {
 474                         pr_debug("invalid mtu (%d) > (%d)\n",
 475                                  ib_mtu_enum_to_int(mtu),
 476                                  ib_mtu_enum_to_int(max_mtu));
 477                         goto err1;
 478                 }
 479         }
 480
 481         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 482                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 483                         pr_warn("invalid max_rd_atomic %d > %d\n",
 484                                 attr->max_rd_atomic,
 485                                 rxe->attr.max_qp_rd_atom);
 486                         goto err1;
 487                 }
 488         }
 489
 490         if (mask & IB_QP_TIMEOUT) {
 491                 if (attr->timeout > 31) {
 492                         pr_warn("invalid QP timeout %d > 31\n",
 493                                 attr->timeout);
 494                         goto err1;
 495                 }
 496         }
 497
 498         return 0;
 499
 500 err1:
 501         return -EINVAL;
 502 }
 503
 504 /* move the qp to the reset state */
 505 static void rxe_qp_reset(struct rxe_qp *qp)
 506 {
 507         /* stop tasks from running */
 508         rxe_disable_task(&qp->resp.task);
 509
 510         /* stop request/comp */
 511         if (qp->sq.queue) {
 512                 if (qp_type(qp) == IB_QPT_RC)
 513                         rxe_disable_task(&qp->comp.task);
 514                 rxe_disable_task(&qp->req.task);
 515         }
 516
 517         /* move qp to the reset state */
 518         qp->req.state = QP_STATE_RESET;
 519         qp->resp.state = QP_STATE_RESET;
 520
 521         /* let state machines reset themselves drain work and packet queues
 522          * etc.
 523          */
 524         __rxe_do_task(&qp->resp.task);
 525
 526         if (qp->sq.queue) {
 527                 __rxe_do_task(&qp->comp.task);
 528                 __rxe_do_task(&qp->req.task);
 529                 rxe_queue_reset(qp->sq.queue);
 530         }
 531
 532         /* cleanup attributes */
 533         atomic_set(&qp->ssn, 0);
 534         qp->req.opcode = -1;
 535         qp->req.need_retry = 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_drop_ref(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
 553         if (qp->sq.queue) {
 554                 if (qp_type(qp) == IB_QPT_RC)
 555                         rxe_enable_task(&qp->comp.task);
 556
 557                 rxe_enable_task(&qp->req.task);
 558         }
 559 }
 560
 561 /* drain the send queue */
 562 static void rxe_qp_drain(struct rxe_qp *qp)
 563 {
 564         if (qp->sq.queue) {
 565                 if (qp->req.state != QP_STATE_DRAINED) {
 566                         qp->req.state = QP_STATE_DRAIN;
 567                         if (qp_type(qp) == IB_QPT_RC)
 568                                 rxe_run_task(&qp->comp.task, 1);
 569                         else
 570                                 __rxe_do_task(&qp->comp.task);
 571                         rxe_run_task(&qp->req.task, 1);
 572                 }
 573         }
 574 }
 575
 576 /* move the qp to the error state */
 577 void rxe_qp_error(struct rxe_qp *qp)
 578 {
 579         qp->req.state = QP_STATE_ERROR;
 580         qp->resp.state = QP_STATE_ERROR;
 581         qp->attr.qp_state = IB_QPS_ERR;
 582
 583         /* drain work and packet queues */
 584         rxe_run_task(&qp->resp.task, 1);
 585
 586         if (qp_type(qp) == IB_QPT_RC)
 587                 rxe_run_task(&qp->comp.task, 1);
 588         else
 589                 __rxe_do_task(&qp->comp.task);
 590         rxe_run_task(&qp->req.task, 1);
 591 }
 592
 593 /* called by the modify qp verb */
 594 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 595                      struct ib_udata *udata)
 596 {
 597         int err;
 598         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 599         union ib_gid sgid;
 600         struct ib_gid_attr sgid_attr;
 601
 602         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 603                 int max_rd_atomic = attr->max_rd_atomic ?
 604                         roundup_pow_of_two(attr->max_rd_atomic) : 0;
 605
 606                 qp->attr.max_rd_atomic = max_rd_atomic;
 607                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 608         }
 609
 610         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 611                 int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
 612                         roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
 613
 614                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 615
 616                 free_rd_atomic_resources(qp);
 617
 618                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 619                 if (err)
 620                         return err;
 621         }
 622
 623         if (mask & IB_QP_CUR_STATE)
 624                 qp->attr.cur_qp_state = attr->qp_state;
 625
 626         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 627                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 628
 629         if (mask & IB_QP_ACCESS_FLAGS)
 630                 qp->attr.qp_access_flags = attr->qp_access_flags;
 631
 632         if (mask & IB_QP_PKEY_INDEX)
 633                 qp->attr.pkey_index = attr->pkey_index;
 634
 635         if (mask & IB_QP_PORT)
 636                 qp->attr.port_num = attr->port_num;
 637
 638         if (mask & IB_QP_QKEY)
 639                 qp->attr.qkey = attr->qkey;
 640
 641         if (mask & IB_QP_AV) {
 642                 ib_get_cached_gid(&rxe->ib_dev, 1,
 643                                   rdma_ah_read_grh(&attr->ah_attr)->sgid_index,
 644                                   &sgid, &sgid_attr);
 645                 rxe_av_from_attr(rxe, attr->port_num, &qp->pri_av,
 646                                  &attr->ah_attr);
 647                 rxe_av_fill_ip_info(rxe, &qp->pri_av, &attr->ah_attr,
 648                                     &sgid_attr, &sgid);
 649                 if (sgid_attr.ndev)
 650                         dev_put(sgid_attr.ndev);
 651         }
 652
 653         if (mask & IB_QP_ALT_PATH) {
 654                 u8 sgid_index =
 655                         rdma_ah_read_grh(&attr->alt_ah_attr)->sgid_index;
 656
 657                 ib_get_cached_gid(&rxe->ib_dev, 1, sgid_index,
 658                                   &sgid, &sgid_attr);
 659
 660                 rxe_av_from_attr(rxe, attr->alt_port_num, &qp->alt_av,
 661                                  &attr->alt_ah_attr);
 662                 rxe_av_fill_ip_info(rxe, &qp->alt_av, &attr->alt_ah_attr,
 663                                     &sgid_attr, &sgid);
 664                 if (sgid_attr.ndev)
 665                         dev_put(sgid_attr.ndev);
 666
 667                 qp->attr.alt_port_num = attr->alt_port_num;
 668                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 669                 qp->attr.alt_timeout = attr->alt_timeout;
 670         }
 671
 672         if (mask & IB_QP_PATH_MTU) {
 673                 qp->attr.path_mtu = attr->path_mtu;
 674                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 675         }
 676
 677         if (mask & IB_QP_TIMEOUT) {
 678                 qp->attr.timeout = attr->timeout;
 679                 if (attr->timeout == 0) {
 680                         qp->qp_timeout_jiffies = 0;
 681                 } else {
 682                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 683                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 684
 685                         qp->qp_timeout_jiffies = j ? j : 1;
 686                 }
 687         }
 688
 689         if (mask & IB_QP_RETRY_CNT) {
 690                 qp->attr.retry_cnt = attr->retry_cnt;
 691                 qp->comp.retry_cnt = attr->retry_cnt;
 692                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 693                          attr->retry_cnt);
 694         }
 695
 696         if (mask & IB_QP_RNR_RETRY) {
 697                 qp->attr.rnr_retry = attr->rnr_retry;
 698                 qp->comp.rnr_retry = attr->rnr_retry;
 699                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 700                          attr->rnr_retry);
 701         }
 702
 703         if (mask & IB_QP_RQ_PSN) {
 704                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 705                 qp->resp.psn = qp->attr.rq_psn;
 706                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 707                          qp->resp.psn);
 708         }
 709
 710         if (mask & IB_QP_MIN_RNR_TIMER) {
 711                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 712                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 713                          attr->min_rnr_timer);
 714         }
 715
 716         if (mask & IB_QP_SQ_PSN) {
 717                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 718                 qp->req.psn = qp->attr.sq_psn;
 719                 qp->comp.psn = qp->attr.sq_psn;
 720                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 721         }
 722
 723         if (mask & IB_QP_PATH_MIG_STATE)
 724                 qp->attr.path_mig_state = attr->path_mig_state;
 725
 726         if (mask & IB_QP_DEST_QPN)
 727                 qp->attr.dest_qp_num = attr->dest_qp_num;
 728
 729         if (mask & IB_QP_STATE) {
 730                 qp->attr.qp_state = attr->qp_state;
 731
 732                 switch (attr->qp_state) {
 733                 case IB_QPS_RESET:
 734                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 735                         rxe_qp_reset(qp);
 736                         break;
 737
 738                 case IB_QPS_INIT:
 739                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 740                         qp->req.state = QP_STATE_INIT;
 741                         qp->resp.state = QP_STATE_INIT;
 742                         break;
 743
 744                 case IB_QPS_RTR:
 745                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 746                         qp->resp.state = QP_STATE_READY;
 747                         break;
 748
 749                 case IB_QPS_RTS:
 750                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 751                         qp->req.state = QP_STATE_READY;
 752                         break;
 753
 754                 case IB_QPS_SQD:
 755                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 756                         rxe_qp_drain(qp);
 757                         break;
 758
 759                 case IB_QPS_SQE:
 760                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 761                         /* Not possible from modify_qp. */
 762                         break;
 763
 764                 case IB_QPS_ERR:
 765                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 766                         rxe_qp_error(qp);
 767                         break;
 768                 }
 769         }
 770
 771         return 0;
 772 }
 773
 774 /* called by the query qp verb */
 775 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 776 {
 777         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 778
 779         *attr = qp->attr;
 780
 781         attr->rq_psn                            = qp->resp.psn;
 782         attr->sq_psn                            = qp->req.psn;
 783
 784         attr->cap.max_send_wr                   = qp->sq.max_wr;
 785         attr->cap.max_send_sge                  = qp->sq.max_sge;
 786         attr->cap.max_inline_data               = qp->sq.max_inline;
 787
 788         if (!qp->srq) {
 789                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 790                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 791         }
 792
 793         rxe_av_to_attr(rxe, &qp->pri_av, &attr->ah_attr);
 794         rxe_av_to_attr(rxe, &qp->alt_av, &attr->alt_ah_attr);
 795
 796         if (qp->req.state == QP_STATE_DRAIN) {
 797                 attr->sq_draining = 1;
 798                 /* applications that get this state
 799                  * typically spin on it. yield the
 800                  * processor
 801                  */
 802                 cond_resched();
 803         } else {
 804                 attr->sq_draining = 0;
 805         }
 806
 807         pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
 808
 809         return 0;
 810 }
 811
 812 /* called by the destroy qp verb */
 813 void rxe_qp_destroy(struct rxe_qp *qp)
 814 {
 815         qp->valid = 0;
 816         qp->qp_timeout_jiffies = 0;
 817         rxe_cleanup_task(&qp->resp.task);
 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         rxe_cleanup_task(&qp->req.task);
 825         rxe_cleanup_task(&qp->comp.task);
 826
 827         /* flush out any receive wr's or pending requests */
 828         __rxe_do_task(&qp->req.task);
 829         if (qp->sq.queue) {
 830                 __rxe_do_task(&qp->comp.task);
 831                 __rxe_do_task(&qp->req.task);
 832         }
 833 }
 834
 835 /* called when the last reference to the qp is dropped */
 836 static void rxe_qp_do_cleanup(struct work_struct *work)
 837 {
 838         struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
 839
 840         rxe_drop_all_mcast_groups(qp);
 841
 842         if (qp->sq.queue)
 843                 rxe_queue_cleanup(qp->sq.queue);
 844
 845         if (qp->srq)
 846                 rxe_drop_ref(qp->srq);
 847
 848         if (qp->rq.queue)
 849                 rxe_queue_cleanup(qp->rq.queue);
 850
 851         if (qp->scq)
 852                 rxe_drop_ref(qp->scq);
 853         if (qp->rcq)
 854                 rxe_drop_ref(qp->rcq);
 855         if (qp->pd)
 856                 rxe_drop_ref(qp->pd);
 857
 858         if (qp->resp.mr) {
 859                 rxe_drop_ref(qp->resp.mr);
 860                 qp->resp.mr = NULL;
 861         }
 862
 863         if (qp_type(qp) == IB_QPT_RC)
 864                 sk_dst_reset(qp->sk->sk);
 865
 866         free_rd_atomic_resources(qp);
 867
 868         kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 869         sock_release(qp->sk);
 870 }
 871
 872 /* called when the last reference to the qp is dropped */
 873 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
 874 {
 875         struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
 876
 877         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 878 }