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         init_timer(&qp->rnr_nak_timer);
 279         qp->rnr_nak_timer.function = rnr_nak_timer;
 280         qp->rnr_nak_timer.data = (unsigned long)qp;
 281
 282         init_timer(&qp->retrans_timer);
 283         qp->retrans_timer.function = retransmit_timer;
 284         qp->retrans_timer.data = (unsigned long)qp;
 285         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 286
 287         return 0;
 288 }
 289
 290 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 291                             struct ib_qp_init_attr *init,
 292                             struct ib_ucontext *context, struct ib_udata *udata)
 293 {
 294         int err;
 295         int wqe_size;
 296
 297         if (!qp->srq) {
 298                 qp->rq.max_wr           = init->cap.max_recv_wr;
 299                 qp->rq.max_sge          = init->cap.max_recv_sge;
 300
 301                 wqe_size = rcv_wqe_size(qp->rq.max_sge);
 302
 303                 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
 304                          qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
 305
 306                 qp->rq.queue = rxe_queue_init(rxe,
 307                                               &qp->rq.max_wr,
 308                                               wqe_size);
 309                 if (!qp->rq.queue)
 310                         return -ENOMEM;
 311
 312                 err = do_mmap_info(rxe, udata, false, context,
 313                                    qp->rq.queue->buf,
 314                                    qp->rq.queue->buf_size,
 315                                    &qp->rq.queue->ip);
 316                 if (err) {
 317                         vfree(qp->rq.queue->buf);
 318                         kfree(qp->rq.queue);
 319                         qp->rq.queue = NULL;
 320                         return err;
 321                 }
 322         }
 323
 324         spin_lock_init(&qp->rq.producer_lock);
 325         spin_lock_init(&qp->rq.consumer_lock);
 326
 327         skb_queue_head_init(&qp->resp_pkts);
 328
 329         rxe_init_task(rxe, &qp->resp.task, qp,
 330                       rxe_responder, "resp");
 331
 332         qp->resp.opcode         = OPCODE_NONE;
 333         qp->resp.msn            = 0;
 334         qp->resp.state          = QP_STATE_RESET;
 335
 336         return 0;
 337 }
 338
 339 /* called by the create qp verb */
 340 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 341                      struct ib_qp_init_attr *init, struct ib_udata *udata,
 342                      struct ib_pd *ibpd)
 343 {
 344         int err;
 345         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 346         struct rxe_cq *scq = to_rcq(init->send_cq);
 347         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 348         struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
 349
 350         rxe_add_ref(pd);
 351         rxe_add_ref(rcq);
 352         rxe_add_ref(scq);
 353         if (srq)
 354                 rxe_add_ref(srq);
 355
 356         qp->pd                  = pd;
 357         qp->rcq                 = rcq;
 358         qp->scq                 = scq;
 359         qp->srq                 = srq;
 360
 361         rxe_qp_init_misc(rxe, qp, init);
 362
 363         err = rxe_qp_init_req(rxe, qp, init, context, udata);
 364         if (err)
 365                 goto err1;
 366
 367         err = rxe_qp_init_resp(rxe, qp, init, context, udata);
 368         if (err)
 369                 goto err2;
 370
 371         qp->attr.qp_state = IB_QPS_RESET;
 372         qp->valid = 1;
 373
 374         return 0;
 375
 376 err2:
 377         rxe_queue_cleanup(qp->sq.queue);
 378 err1:
 379         qp->pd = NULL;
 380         qp->rcq = NULL;
 381         qp->scq = NULL;
 382         qp->srq = NULL;
 383
 384         if (srq)
 385                 rxe_drop_ref(srq);
 386         rxe_drop_ref(scq);
 387         rxe_drop_ref(rcq);
 388         rxe_drop_ref(pd);
 389
 390         return err;
 391 }
 392
 393 /* called by the query qp verb */
 394 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 395 {
 396         init->event_handler             = qp->ibqp.event_handler;
 397         init->qp_context                = qp->ibqp.qp_context;
 398         init->send_cq                   = qp->ibqp.send_cq;
 399         init->recv_cq                   = qp->ibqp.recv_cq;
 400         init->srq                       = qp->ibqp.srq;
 401
 402         init->cap.max_send_wr           = qp->sq.max_wr;
 403         init->cap.max_send_sge          = qp->sq.max_sge;
 404         init->cap.max_inline_data       = qp->sq.max_inline;
 405
 406         if (!qp->srq) {
 407                 init->cap.max_recv_wr           = qp->rq.max_wr;
 408                 init->cap.max_recv_sge          = qp->rq.max_sge;
 409         }
 410
 411         init->sq_sig_type               = qp->sq_sig_type;
 412
 413         init->qp_type                   = qp->ibqp.qp_type;
 414         init->port_num                  = 1;
 415
 416         return 0;
 417 }
 418
 419 /* called by the modify qp verb, this routine checks all the parameters before
 420  * making any changes
 421  */
 422 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 423                     struct ib_qp_attr *attr, int mask)
 424 {
 425         enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
 426                                         attr->cur_qp_state : qp->attr.qp_state;
 427         enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
 428                                         attr->qp_state : cur_state;
 429
 430         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask,
 431                                 IB_LINK_LAYER_ETHERNET)) {
 432                 pr_warn("invalid mask or state for qp\n");
 433                 goto err1;
 434         }
 435
 436         if (mask & IB_QP_STATE) {
 437                 if (cur_state == IB_QPS_SQD) {
 438                         if (qp->req.state == QP_STATE_DRAIN &&
 439                             new_state != IB_QPS_ERR)
 440                                 goto err1;
 441                 }
 442         }
 443
 444         if (mask & IB_QP_PORT) {
 445                 if (attr->port_num != 1) {
 446                         pr_warn("invalid port %d\n", attr->port_num);
 447                         goto err1;
 448                 }
 449         }
 450
 451         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 452                 goto err1;
 453
 454         if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
 455                 goto err1;
 456
 457         if (mask & IB_QP_ALT_PATH) {
 458                 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
 459                         goto err1;
 460                 if (attr->alt_port_num != 1) {
 461                         pr_warn("invalid alt port %d\n", attr->alt_port_num);
 462                         goto err1;
 463                 }
 464                 if (attr->alt_timeout > 31) {
 465                         pr_warn("invalid QP alt timeout %d > 31\n",
 466                                 attr->alt_timeout);
 467                         goto err1;
 468                 }
 469         }
 470
 471         if (mask & IB_QP_PATH_MTU) {
 472                 struct rxe_port *port = &rxe->port;
 473
 474                 enum ib_mtu max_mtu = port->attr.max_mtu;
 475                 enum ib_mtu mtu = attr->path_mtu;
 476
 477                 if (mtu > max_mtu) {
 478                         pr_debug("invalid mtu (%d) > (%d)\n",
 479                                  ib_mtu_enum_to_int(mtu),
 480                                  ib_mtu_enum_to_int(max_mtu));
 481                         goto err1;
 482                 }
 483         }
 484
 485         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 486                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 487                         pr_warn("invalid max_rd_atomic %d > %d\n",
 488                                 attr->max_rd_atomic,
 489                                 rxe->attr.max_qp_rd_atom);
 490                         goto err1;
 491                 }
 492         }
 493
 494         if (mask & IB_QP_TIMEOUT) {
 495                 if (attr->timeout > 31) {
 496                         pr_warn("invalid QP timeout %d > 31\n",
 497                                 attr->timeout);
 498                         goto err1;
 499                 }
 500         }
 501
 502         return 0;
 503
 504 err1:
 505         return -EINVAL;
 506 }
 507
 508 /* move the qp to the reset state */
 509 static void rxe_qp_reset(struct rxe_qp *qp)
 510 {
 511         /* stop tasks from running */
 512         rxe_disable_task(&qp->resp.task);
 513
 514         /* stop request/comp */
 515         if (qp->sq.queue) {
 516                 if (qp_type(qp) == IB_QPT_RC)
 517                         rxe_disable_task(&qp->comp.task);
 518                 rxe_disable_task(&qp->req.task);
 519         }
 520
 521         /* move qp to the reset state */
 522         qp->req.state = QP_STATE_RESET;
 523         qp->resp.state = QP_STATE_RESET;
 524
 525         /* let state machines reset themselves drain work and packet queues
 526          * etc.
 527          */
 528         __rxe_do_task(&qp->resp.task);
 529
 530         if (qp->sq.queue) {
 531                 __rxe_do_task(&qp->comp.task);
 532                 __rxe_do_task(&qp->req.task);
 533                 rxe_queue_reset(qp->sq.queue);
 534         }
 535
 536         /* cleanup attributes */
 537         atomic_set(&qp->ssn, 0);
 538         qp->req.opcode = -1;
 539         qp->req.need_retry = 0;
 540         qp->req.noack_pkts = 0;
 541         qp->resp.msn = 0;
 542         qp->resp.opcode = -1;
 543         qp->resp.drop_msg = 0;
 544         qp->resp.goto_error = 0;
 545         qp->resp.sent_psn_nak = 0;
 546
 547         if (qp->resp.mr) {
 548                 rxe_drop_ref(qp->resp.mr);
 549                 qp->resp.mr = NULL;
 550         }
 551
 552         cleanup_rd_atomic_resources(qp);
 553
 554         /* reenable tasks */
 555         rxe_enable_task(&qp->resp.task);
 556
 557         if (qp->sq.queue) {
 558                 if (qp_type(qp) == IB_QPT_RC)
 559                         rxe_enable_task(&qp->comp.task);
 560
 561                 rxe_enable_task(&qp->req.task);
 562         }
 563 }
 564
 565 /* drain the send queue */
 566 static void rxe_qp_drain(struct rxe_qp *qp)
 567 {
 568         if (qp->sq.queue) {
 569                 if (qp->req.state != QP_STATE_DRAINED) {
 570                         qp->req.state = QP_STATE_DRAIN;
 571                         if (qp_type(qp) == IB_QPT_RC)
 572                                 rxe_run_task(&qp->comp.task, 1);
 573                         else
 574                                 __rxe_do_task(&qp->comp.task);
 575                         rxe_run_task(&qp->req.task, 1);
 576                 }
 577         }
 578 }
 579
 580 /* move the qp to the error state */
 581 void rxe_qp_error(struct rxe_qp *qp)
 582 {
 583         qp->req.state = QP_STATE_ERROR;
 584         qp->resp.state = QP_STATE_ERROR;
 585         qp->attr.qp_state = IB_QPS_ERR;
 586
 587         /* drain work and packet queues */
 588         rxe_run_task(&qp->resp.task, 1);
 589
 590         if (qp_type(qp) == IB_QPT_RC)
 591                 rxe_run_task(&qp->comp.task, 1);
 592         else
 593                 __rxe_do_task(&qp->comp.task);
 594         rxe_run_task(&qp->req.task, 1);
 595 }
 596
 597 /* called by the modify qp verb */
 598 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 599                      struct ib_udata *udata)
 600 {
 601         int err;
 602         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 603         union ib_gid sgid;
 604         struct ib_gid_attr sgid_attr;
 605
 606         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 607                 int max_rd_atomic = attr->max_rd_atomic ?
 608                         roundup_pow_of_two(attr->max_rd_atomic) : 0;
 609
 610                 qp->attr.max_rd_atomic = max_rd_atomic;
 611                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 612         }
 613
 614         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 615                 int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
 616                         roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
 617
 618                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 619
 620                 free_rd_atomic_resources(qp);
 621
 622                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 623                 if (err)
 624                         return err;
 625         }
 626
 627         if (mask & IB_QP_CUR_STATE)
 628                 qp->attr.cur_qp_state = attr->qp_state;
 629
 630         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 631                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 632
 633         if (mask & IB_QP_ACCESS_FLAGS)
 634                 qp->attr.qp_access_flags = attr->qp_access_flags;
 635
 636         if (mask & IB_QP_PKEY_INDEX)
 637                 qp->attr.pkey_index = attr->pkey_index;
 638
 639         if (mask & IB_QP_PORT)
 640                 qp->attr.port_num = attr->port_num;
 641
 642         if (mask & IB_QP_QKEY)
 643                 qp->attr.qkey = attr->qkey;
 644
 645         if (mask & IB_QP_AV) {
 646                 ib_get_cached_gid(&rxe->ib_dev, 1,
 647                                   attr->ah_attr.grh.sgid_index, &sgid,
 648                                   &sgid_attr);
 649                 rxe_av_from_attr(rxe, attr->port_num, &qp->pri_av,
 650                                  &attr->ah_attr);
 651                 rxe_av_fill_ip_info(rxe, &qp->pri_av, &attr->ah_attr,
 652                                     &sgid_attr, &sgid);
 653                 if (sgid_attr.ndev)
 654                         dev_put(sgid_attr.ndev);
 655         }
 656
 657         if (mask & IB_QP_ALT_PATH) {
 658                 ib_get_cached_gid(&rxe->ib_dev, 1,
 659                                   attr->alt_ah_attr.grh.sgid_index, &sgid,
 660                                   &sgid_attr);
 661
 662                 rxe_av_from_attr(rxe, attr->alt_port_num, &qp->alt_av,
 663                                  &attr->alt_ah_attr);
 664                 rxe_av_fill_ip_info(rxe, &qp->alt_av, &attr->alt_ah_attr,
 665                                     &sgid_attr, &sgid);
 666                 if (sgid_attr.ndev)
 667                         dev_put(sgid_attr.ndev);
 668
 669                 qp->attr.alt_port_num = attr->alt_port_num;
 670                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 671                 qp->attr.alt_timeout = attr->alt_timeout;
 672         }
 673
 674         if (mask & IB_QP_PATH_MTU) {
 675                 qp->attr.path_mtu = attr->path_mtu;
 676                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 677         }
 678
 679         if (mask & IB_QP_TIMEOUT) {
 680                 qp->attr.timeout = attr->timeout;
 681                 if (attr->timeout == 0) {
 682                         qp->qp_timeout_jiffies = 0;
 683                 } else {
 684                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 685                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 686
 687                         qp->qp_timeout_jiffies = j ? j : 1;
 688                 }
 689         }
 690
 691         if (mask & IB_QP_RETRY_CNT) {
 692                 qp->attr.retry_cnt = attr->retry_cnt;
 693                 qp->comp.retry_cnt = attr->retry_cnt;
 694                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 695                          attr->retry_cnt);
 696         }
 697
 698         if (mask & IB_QP_RNR_RETRY) {
 699                 qp->attr.rnr_retry = attr->rnr_retry;
 700                 qp->comp.rnr_retry = attr->rnr_retry;
 701                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 702                          attr->rnr_retry);
 703         }
 704
 705         if (mask & IB_QP_RQ_PSN) {
 706                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 707                 qp->resp.psn = qp->attr.rq_psn;
 708                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 709                          qp->resp.psn);
 710         }
 711
 712         if (mask & IB_QP_MIN_RNR_TIMER) {
 713                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 714                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 715                          attr->min_rnr_timer);
 716         }
 717
 718         if (mask & IB_QP_SQ_PSN) {
 719                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 720                 qp->req.psn = qp->attr.sq_psn;
 721                 qp->comp.psn = qp->attr.sq_psn;
 722                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 723         }
 724
 725         if (mask & IB_QP_PATH_MIG_STATE)
 726                 qp->attr.path_mig_state = attr->path_mig_state;
 727
 728         if (mask & IB_QP_DEST_QPN)
 729                 qp->attr.dest_qp_num = attr->dest_qp_num;
 730
 731         if (mask & IB_QP_STATE) {
 732                 qp->attr.qp_state = attr->qp_state;
 733
 734                 switch (attr->qp_state) {
 735                 case IB_QPS_RESET:
 736                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 737                         rxe_qp_reset(qp);
 738                         break;
 739
 740                 case IB_QPS_INIT:
 741                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 742                         qp->req.state = QP_STATE_INIT;
 743                         qp->resp.state = QP_STATE_INIT;
 744                         break;
 745
 746                 case IB_QPS_RTR:
 747                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 748                         qp->resp.state = QP_STATE_READY;
 749                         break;
 750
 751                 case IB_QPS_RTS:
 752                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 753                         qp->req.state = QP_STATE_READY;
 754                         break;
 755
 756                 case IB_QPS_SQD:
 757                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 758                         rxe_qp_drain(qp);
 759                         break;
 760
 761                 case IB_QPS_SQE:
 762                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 763                         /* Not possible from modify_qp. */
 764                         break;
 765
 766                 case IB_QPS_ERR:
 767                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 768                         rxe_qp_error(qp);
 769                         break;
 770                 }
 771         }
 772
 773         return 0;
 774 }
 775
 776 /* called by the query qp verb */
 777 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 778 {
 779         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 780
 781         *attr = qp->attr;
 782
 783         attr->rq_psn                            = qp->resp.psn;
 784         attr->sq_psn                            = qp->req.psn;
 785
 786         attr->cap.max_send_wr                   = qp->sq.max_wr;
 787         attr->cap.max_send_sge                  = qp->sq.max_sge;
 788         attr->cap.max_inline_data               = qp->sq.max_inline;
 789
 790         if (!qp->srq) {
 791                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 792                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 793         }
 794
 795         rxe_av_to_attr(rxe, &qp->pri_av, &attr->ah_attr);
 796         rxe_av_to_attr(rxe, &qp->alt_av, &attr->alt_ah_attr);
 797
 798         if (qp->req.state == QP_STATE_DRAIN) {
 799                 attr->sq_draining = 1;
 800                 /* applications that get this state
 801                  * typically spin on it. yield the
 802                  * processor
 803                  */
 804                 cond_resched();
 805         } else {
 806                 attr->sq_draining = 0;
 807         }
 808
 809         pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
 810
 811         return 0;
 812 }
 813
 814 /* called by the destroy qp verb */
 815 void rxe_qp_destroy(struct rxe_qp *qp)
 816 {
 817         qp->valid = 0;
 818         qp->qp_timeout_jiffies = 0;
 819         rxe_cleanup_task(&qp->resp.task);
 820
 821         del_timer_sync(&qp->retrans_timer);
 822         del_timer_sync(&qp->rnr_nak_timer);
 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 void rxe_qp_cleanup(void *arg)
 837 {
 838         struct rxe_qp *qp = arg;
 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         free_rd_atomic_resources(qp);
 864
 865         kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 866         sock_release(qp->sk);
 867 }