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
  38 #include "rxe.h"
  39 #include "rxe_loc.h"
  40 #include "rxe_queue.h"
  41 #include "rxe_task.h"
  42
  43 char *rxe_qp_state_name[] = {
  44         [QP_STATE_RESET]        = "RESET",
  45         [QP_STATE_INIT]         = "INIT",
  46         [QP_STATE_READY]        = "READY",
  47         [QP_STATE_DRAIN]        = "DRAIN",
  48         [QP_STATE_DRAINED]      = "DRAINED",
  49         [QP_STATE_ERROR]        = "ERROR",
  50 };
  51
  52 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
  53                           int has_srq)
  54 {
  55         if (cap->max_send_wr > rxe->attr.max_qp_wr) {
  56                 pr_warn("invalid send wr = %d > %d\n",
  57                         cap->max_send_wr, rxe->attr.max_qp_wr);
  58                 goto err1;
  59         }
  60
  61         if (cap->max_send_sge > rxe->attr.max_sge) {
  62                 pr_warn("invalid send sge = %d > %d\n",
  63                         cap->max_send_sge, rxe->attr.max_sge);
  64                 goto err1;
  65         }
  66
  67         if (!has_srq) {
  68                 if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
  69                         pr_warn("invalid recv wr = %d > %d\n",
  70                                 cap->max_recv_wr, rxe->attr.max_qp_wr);
  71                         goto err1;
  72                 }
  73
  74                 if (cap->max_recv_sge > rxe->attr.max_sge) {
  75                         pr_warn("invalid recv sge = %d > %d\n",
  76                                 cap->max_recv_sge, rxe->attr.max_sge);
  77                         goto err1;
  78                 }
  79         }
  80
  81         if (cap->max_inline_data > rxe->max_inline_data) {
  82                 pr_warn("invalid max inline data = %d > %d\n",
  83                         cap->max_inline_data, rxe->max_inline_data);
  84                 goto err1;
  85         }
  86
  87         return 0;
  88
  89 err1:
  90         return -EINVAL;
  91 }
  92
  93 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
  94 {
  95         struct ib_qp_cap *cap = &init->cap;
  96         struct rxe_port *port;
  97         int port_num = init->port_num;
  98
  99         if (!init->recv_cq || !init->send_cq) {
 100                 pr_warn("missing cq\n");
 101                 goto err1;
 102         }
 103
 104         if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
 105                 goto err1;
 106
 107         if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) {
 108                 if (port_num != 1) {
 109                         pr_warn("invalid port = %d\n", port_num);
 110                         goto err1;
 111                 }
 112
 113                 port = &rxe->port;
 114
 115                 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) {
 116                         pr_warn("SMI QP exists for port %d\n", port_num);
 117                         goto err1;
 118                 }
 119
 120                 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
 121                         pr_warn("GSI QP exists for port %d\n", port_num);
 122                         goto err1;
 123                 }
 124         }
 125
 126         return 0;
 127
 128 err1:
 129         return -EINVAL;
 130 }
 131
 132 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
 133 {
 134         qp->resp.res_head = 0;
 135         qp->resp.res_tail = 0;
 136         qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
 137
 138         if (!qp->resp.resources)
 139                 return -ENOMEM;
 140
 141         return 0;
 142 }
 143
 144 static void free_rd_atomic_resources(struct rxe_qp *qp)
 145 {
 146         if (qp->resp.resources) {
 147                 int i;
 148
 149                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 150                         struct resp_res *res = &qp->resp.resources[i];
 151
 152                         free_rd_atomic_resource(qp, res);
 153                 }
 154                 kfree(qp->resp.resources);
 155                 qp->resp.resources = NULL;
 156         }
 157 }
 158
 159 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res)
 160 {
 161         if (res->type == RXE_ATOMIC_MASK) {
 162                 rxe_drop_ref(qp);
 163                 kfree_skb(res->atomic.skb);
 164         } else if (res->type == RXE_READ_MASK) {
 165                 if (res->read.mr)
 166                         rxe_drop_ref(res->read.mr);
 167         }
 168         res->type = 0;
 169 }
 170
 171 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
 172 {
 173         int i;
 174         struct resp_res *res;
 175
 176         if (qp->resp.resources) {
 177                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 178                         res = &qp->resp.resources[i];
 179                         free_rd_atomic_resource(qp, res);
 180                 }
 181         }
 182 }
 183
 184 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
 185                              struct ib_qp_init_attr *init)
 186 {
 187         struct rxe_port *port;
 188         u32 qpn;
 189
 190         qp->sq_sig_type         = init->sq_sig_type;
 191         qp->attr.path_mtu       = 1;
 192         qp->mtu                 = ib_mtu_enum_to_int(qp->attr.path_mtu);
 193
 194         qpn                     = qp->pelem.index;
 195         port                    = &rxe->port;
 196
 197         switch (init->qp_type) {
 198         case IB_QPT_SMI:
 199                 qp->ibqp.qp_num         = 0;
 200                 port->qp_smi_index      = qpn;
 201                 qp->attr.port_num       = init->port_num;
 202                 break;
 203
 204         case IB_QPT_GSI:
 205                 qp->ibqp.qp_num         = 1;
 206                 port->qp_gsi_index      = qpn;
 207                 qp->attr.port_num       = init->port_num;
 208                 break;
 209
 210         default:
 211                 qp->ibqp.qp_num         = qpn;
 212                 break;
 213         }
 214
 215         INIT_LIST_HEAD(&qp->grp_list);
 216
 217         skb_queue_head_init(&qp->send_pkts);
 218
 219         spin_lock_init(&qp->grp_lock);
 220         spin_lock_init(&qp->state_lock);
 221
 222         atomic_set(&qp->ssn, 0);
 223         atomic_set(&qp->skb_out, 0);
 224 }
 225
 226 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 227                            struct ib_qp_init_attr *init,
 228                            struct ib_ucontext *context, struct ib_udata *udata)
 229 {
 230         int err;
 231         int wqe_size;
 232
 233         err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
 234         if (err < 0)
 235                 return err;
 236         qp->sk->sk->sk_user_data = qp;
 237
 238         qp->sq.max_wr           = init->cap.max_send_wr;
 239         qp->sq.max_sge          = init->cap.max_send_sge;
 240         qp->sq.max_inline       = init->cap.max_inline_data;
 241
 242         wqe_size = max_t(int, sizeof(struct rxe_send_wqe) +
 243                          qp->sq.max_sge * sizeof(struct ib_sge),
 244                          sizeof(struct rxe_send_wqe) +
 245                          qp->sq.max_inline);
 246
 247         qp->sq.queue = rxe_queue_init(rxe,
 248                                       &qp->sq.max_wr,
 249                                       wqe_size);
 250         if (!qp->sq.queue)
 251                 return -ENOMEM;
 252
 253         err = do_mmap_info(rxe, udata, true,
 254                            context, qp->sq.queue->buf,
 255                            qp->sq.queue->buf_size, &qp->sq.queue->ip);
 256
 257         if (err) {
 258                 kvfree(qp->sq.queue->buf);
 259                 kfree(qp->sq.queue);
 260                 return err;
 261         }
 262
 263         qp->req.wqe_index       = producer_index(qp->sq.queue);
 264         qp->req.state           = QP_STATE_RESET;
 265         qp->req.opcode          = -1;
 266         qp->comp.opcode         = -1;
 267
 268         spin_lock_init(&qp->sq.sq_lock);
 269         skb_queue_head_init(&qp->req_pkts);
 270
 271         rxe_init_task(rxe, &qp->req.task, qp,
 272                       rxe_requester, "req");
 273         rxe_init_task(rxe, &qp->comp.task, qp,
 274                       rxe_completer, "comp");
 275
 276         setup_timer(&qp->rnr_nak_timer, rnr_nak_timer, (unsigned long)qp);
 277         setup_timer(&qp->retrans_timer, retransmit_timer, (unsigned long)qp);
 278         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 279
 280         return 0;
 281 }
 282
 283 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 284                             struct ib_qp_init_attr *init,
 285                             struct ib_ucontext *context, struct ib_udata *udata)
 286 {
 287         int err;
 288         int wqe_size;
 289
 290         if (!qp->srq) {
 291                 qp->rq.max_wr           = init->cap.max_recv_wr;
 292                 qp->rq.max_sge          = init->cap.max_recv_sge;
 293
 294                 wqe_size = rcv_wqe_size(qp->rq.max_sge);
 295
 296                 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
 297                          qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
 298
 299                 qp->rq.queue = rxe_queue_init(rxe,
 300                                               &qp->rq.max_wr,
 301                                               wqe_size);
 302                 if (!qp->rq.queue)
 303                         return -ENOMEM;
 304
 305                 err = do_mmap_info(rxe, udata, false, context,
 306                                    qp->rq.queue->buf,
 307                                    qp->rq.queue->buf_size,
 308                                    &qp->rq.queue->ip);
 309                 if (err) {
 310                         kvfree(qp->rq.queue->buf);
 311                         kfree(qp->rq.queue);
 312                         return err;
 313                 }
 314         }
 315
 316         spin_lock_init(&qp->rq.producer_lock);
 317         spin_lock_init(&qp->rq.consumer_lock);
 318
 319         skb_queue_head_init(&qp->resp_pkts);
 320
 321         rxe_init_task(rxe, &qp->resp.task, qp,
 322                       rxe_responder, "resp");
 323
 324         qp->resp.opcode         = OPCODE_NONE;
 325         qp->resp.msn            = 0;
 326         qp->resp.state          = QP_STATE_RESET;
 327
 328         return 0;
 329 }
 330
 331 /* called by the create qp verb */
 332 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 333                      struct ib_qp_init_attr *init, struct ib_udata *udata,
 334                      struct ib_pd *ibpd)
 335 {
 336         int err;
 337         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 338         struct rxe_cq *scq = to_rcq(init->send_cq);
 339         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 340         struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
 341
 342         rxe_add_ref(pd);
 343         rxe_add_ref(rcq);
 344         rxe_add_ref(scq);
 345         if (srq)
 346                 rxe_add_ref(srq);
 347
 348         qp->pd                  = pd;
 349         qp->rcq                 = rcq;
 350         qp->scq                 = scq;
 351         qp->srq                 = srq;
 352
 353         rxe_qp_init_misc(rxe, qp, init);
 354
 355         err = rxe_qp_init_req(rxe, qp, init, context, udata);
 356         if (err)
 357                 goto err1;
 358
 359         err = rxe_qp_init_resp(rxe, qp, init, context, udata);
 360         if (err)
 361                 goto err2;
 362
 363         qp->attr.qp_state = IB_QPS_RESET;
 364         qp->valid = 1;
 365
 366         return 0;
 367
 368 err2:
 369         rxe_queue_cleanup(qp->sq.queue);
 370 err1:
 371         if (srq)
 372                 rxe_drop_ref(srq);
 373         rxe_drop_ref(scq);
 374         rxe_drop_ref(rcq);
 375         rxe_drop_ref(pd);
 376
 377         return err;
 378 }
 379
 380 /* called by the query qp verb */
 381 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 382 {
 383         init->event_handler             = qp->ibqp.event_handler;
 384         init->qp_context                = qp->ibqp.qp_context;
 385         init->send_cq                   = qp->ibqp.send_cq;
 386         init->recv_cq                   = qp->ibqp.recv_cq;
 387         init->srq                       = qp->ibqp.srq;
 388
 389         init->cap.max_send_wr           = qp->sq.max_wr;
 390         init->cap.max_send_sge          = qp->sq.max_sge;
 391         init->cap.max_inline_data       = qp->sq.max_inline;
 392
 393         if (!qp->srq) {
 394                 init->cap.max_recv_wr           = qp->rq.max_wr;
 395                 init->cap.max_recv_sge          = qp->rq.max_sge;
 396         }
 397
 398         init->sq_sig_type               = qp->sq_sig_type;
 399
 400         init->qp_type                   = qp->ibqp.qp_type;
 401         init->port_num                  = 1;
 402
 403         return 0;
 404 }
 405
 406 /* called by the modify qp verb, this routine checks all the parameters before
 407  * making any changes
 408  */
 409 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 410                     struct ib_qp_attr *attr, int mask)
 411 {
 412         enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
 413                                         attr->cur_qp_state : qp->attr.qp_state;
 414         enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
 415                                         attr->qp_state : cur_state;
 416
 417         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask,
 418                                 IB_LINK_LAYER_ETHERNET)) {
 419                 pr_warn("invalid mask or state for qp\n");
 420                 goto err1;
 421         }
 422
 423         if (mask & IB_QP_STATE) {
 424                 if (cur_state == IB_QPS_SQD) {
 425                         if (qp->req.state == QP_STATE_DRAIN &&
 426                             new_state != IB_QPS_ERR)
 427                                 goto err1;
 428                 }
 429         }
 430
 431         if (mask & IB_QP_PORT) {
 432                 if (attr->port_num != 1) {
 433                         pr_warn("invalid port %d\n", attr->port_num);
 434                         goto err1;
 435                 }
 436         }
 437
 438         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 439                 goto err1;
 440
 441         if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
 442                 goto err1;
 443
 444         if (mask & IB_QP_ALT_PATH) {
 445                 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
 446                         goto err1;
 447                 if (attr->alt_port_num != 1) {
 448                         pr_warn("invalid alt port %d\n", attr->alt_port_num);
 449                         goto err1;
 450                 }
 451                 if (attr->alt_timeout > 31) {
 452                         pr_warn("invalid QP alt timeout %d > 31\n",
 453                                 attr->alt_timeout);
 454                         goto err1;
 455                 }
 456         }
 457
 458         if (mask & IB_QP_PATH_MTU) {
 459                 struct rxe_port *port = &rxe->port;
 460
 461                 enum ib_mtu max_mtu = port->attr.max_mtu;
 462                 enum ib_mtu mtu = attr->path_mtu;
 463
 464                 if (mtu > max_mtu) {
 465                         pr_debug("invalid mtu (%d) > (%d)\n",
 466                                  ib_mtu_enum_to_int(mtu),
 467                                  ib_mtu_enum_to_int(max_mtu));
 468                         goto err1;
 469                 }
 470         }
 471
 472         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 473                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 474                         pr_warn("invalid max_rd_atomic %d > %d\n",
 475                                 attr->max_rd_atomic,
 476                                 rxe->attr.max_qp_rd_atom);
 477                         goto err1;
 478                 }
 479         }
 480
 481         if (mask & IB_QP_TIMEOUT) {
 482                 if (attr->timeout > 31) {
 483                         pr_warn("invalid QP timeout %d > 31\n",
 484                                 attr->timeout);
 485                         goto err1;
 486                 }
 487         }
 488
 489         return 0;
 490
 491 err1:
 492         return -EINVAL;
 493 }
 494
 495 /* move the qp to the reset state */
 496 static void rxe_qp_reset(struct rxe_qp *qp)
 497 {
 498         /* stop tasks from running */
 499         rxe_disable_task(&qp->resp.task);
 500
 501         /* stop request/comp */
 502         if (qp->sq.queue) {
 503                 if (qp_type(qp) == IB_QPT_RC)
 504                         rxe_disable_task(&qp->comp.task);
 505                 rxe_disable_task(&qp->req.task);
 506         }
 507
 508         /* move qp to the reset state */
 509         qp->req.state = QP_STATE_RESET;
 510         qp->resp.state = QP_STATE_RESET;
 511
 512         /* let state machines reset themselves drain work and packet queues
 513          * etc.
 514          */
 515         __rxe_do_task(&qp->resp.task);
 516
 517         if (qp->sq.queue) {
 518                 __rxe_do_task(&qp->comp.task);
 519                 __rxe_do_task(&qp->req.task);
 520                 rxe_queue_reset(qp->sq.queue);
 521         }
 522
 523         /* cleanup attributes */
 524         atomic_set(&qp->ssn, 0);
 525         qp->req.opcode = -1;
 526         qp->req.need_retry = 0;
 527         qp->req.noack_pkts = 0;
 528         qp->resp.msn = 0;
 529         qp->resp.opcode = -1;
 530         qp->resp.drop_msg = 0;
 531         qp->resp.goto_error = 0;
 532         qp->resp.sent_psn_nak = 0;
 533
 534         if (qp->resp.mr) {
 535                 rxe_drop_ref(qp->resp.mr);
 536                 qp->resp.mr = NULL;
 537         }
 538
 539         cleanup_rd_atomic_resources(qp);
 540
 541         /* reenable tasks */
 542         rxe_enable_task(&qp->resp.task);
 543
 544         if (qp->sq.queue) {
 545                 if (qp_type(qp) == IB_QPT_RC)
 546                         rxe_enable_task(&qp->comp.task);
 547
 548                 rxe_enable_task(&qp->req.task);
 549         }
 550 }
 551
 552 /* drain the send queue */
 553 static void rxe_qp_drain(struct rxe_qp *qp)
 554 {
 555         if (qp->sq.queue) {
 556                 if (qp->req.state != QP_STATE_DRAINED) {
 557                         qp->req.state = QP_STATE_DRAIN;
 558                         if (qp_type(qp) == IB_QPT_RC)
 559                                 rxe_run_task(&qp->comp.task, 1);
 560                         else
 561                                 __rxe_do_task(&qp->comp.task);
 562                         rxe_run_task(&qp->req.task, 1);
 563                 }
 564         }
 565 }
 566
 567 /* move the qp to the error state */
 568 void rxe_qp_error(struct rxe_qp *qp)
 569 {
 570         qp->req.state = QP_STATE_ERROR;
 571         qp->resp.state = QP_STATE_ERROR;
 572         qp->attr.qp_state = IB_QPS_ERR;
 573
 574         /* drain work and packet queues */
 575         rxe_run_task(&qp->resp.task, 1);
 576
 577         if (qp_type(qp) == IB_QPT_RC)
 578                 rxe_run_task(&qp->comp.task, 1);
 579         else
 580                 __rxe_do_task(&qp->comp.task);
 581         rxe_run_task(&qp->req.task, 1);
 582 }
 583
 584 /* called by the modify qp verb */
 585 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 586                      struct ib_udata *udata)
 587 {
 588         int err;
 589         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 590         union ib_gid sgid;
 591         struct ib_gid_attr sgid_attr;
 592
 593         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 594                 int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
 595
 596                 qp->attr.max_rd_atomic = max_rd_atomic;
 597                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 598         }
 599
 600         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 601                 int max_dest_rd_atomic =
 602                         __roundup_pow_of_two(attr->max_dest_rd_atomic);
 603
 604                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 605
 606                 free_rd_atomic_resources(qp);
 607
 608                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 609                 if (err)
 610                         return err;
 611         }
 612
 613         if (mask & IB_QP_CUR_STATE)
 614                 qp->attr.cur_qp_state = attr->qp_state;
 615
 616         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 617                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 618
 619         if (mask & IB_QP_ACCESS_FLAGS)
 620                 qp->attr.qp_access_flags = attr->qp_access_flags;
 621
 622         if (mask & IB_QP_PKEY_INDEX)
 623                 qp->attr.pkey_index = attr->pkey_index;
 624
 625         if (mask & IB_QP_PORT)
 626                 qp->attr.port_num = attr->port_num;
 627
 628         if (mask & IB_QP_QKEY)
 629                 qp->attr.qkey = attr->qkey;
 630
 631         if (mask & IB_QP_AV) {
 632                 ib_get_cached_gid(&rxe->ib_dev, 1,
 633                                   attr->ah_attr.grh.sgid_index, &sgid,
 634                                   &sgid_attr);
 635                 rxe_av_from_attr(rxe, attr->port_num, &qp->pri_av,
 636                                  &attr->ah_attr);
 637                 rxe_av_fill_ip_info(rxe, &qp->pri_av, &attr->ah_attr,
 638                                     &sgid_attr, &sgid);
 639                 if (sgid_attr.ndev)
 640                         dev_put(sgid_attr.ndev);
 641         }
 642
 643         if (mask & IB_QP_ALT_PATH) {
 644                 ib_get_cached_gid(&rxe->ib_dev, 1,
 645                                   attr->alt_ah_attr.grh.sgid_index, &sgid,
 646                                   &sgid_attr);
 647
 648                 rxe_av_from_attr(rxe, attr->alt_port_num, &qp->alt_av,
 649                                  &attr->alt_ah_attr);
 650                 rxe_av_fill_ip_info(rxe, &qp->alt_av, &attr->alt_ah_attr,
 651                                     &sgid_attr, &sgid);
 652                 if (sgid_attr.ndev)
 653                         dev_put(sgid_attr.ndev);
 654
 655                 qp->attr.alt_port_num = attr->alt_port_num;
 656                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 657                 qp->attr.alt_timeout = attr->alt_timeout;
 658         }
 659
 660         if (mask & IB_QP_PATH_MTU) {
 661                 qp->attr.path_mtu = attr->path_mtu;
 662                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 663         }
 664
 665         if (mask & IB_QP_TIMEOUT) {
 666                 qp->attr.timeout = attr->timeout;
 667                 if (attr->timeout == 0) {
 668                         qp->qp_timeout_jiffies = 0;
 669                 } else {
 670                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 671                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 672
 673                         qp->qp_timeout_jiffies = j ? j : 1;
 674                 }
 675         }
 676
 677         if (mask & IB_QP_RETRY_CNT) {
 678                 qp->attr.retry_cnt = attr->retry_cnt;
 679                 qp->comp.retry_cnt = attr->retry_cnt;
 680                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 681                          attr->retry_cnt);
 682         }
 683
 684         if (mask & IB_QP_RNR_RETRY) {
 685                 qp->attr.rnr_retry = attr->rnr_retry;
 686                 qp->comp.rnr_retry = attr->rnr_retry;
 687                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 688                          attr->rnr_retry);
 689         }
 690
 691         if (mask & IB_QP_RQ_PSN) {
 692                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 693                 qp->resp.psn = qp->attr.rq_psn;
 694                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 695                          qp->resp.psn);
 696         }
 697
 698         if (mask & IB_QP_MIN_RNR_TIMER) {
 699                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 700                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 701                          attr->min_rnr_timer);
 702         }
 703
 704         if (mask & IB_QP_SQ_PSN) {
 705                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 706                 qp->req.psn = qp->attr.sq_psn;
 707                 qp->comp.psn = qp->attr.sq_psn;
 708                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 709         }
 710
 711         if (mask & IB_QP_PATH_MIG_STATE)
 712                 qp->attr.path_mig_state = attr->path_mig_state;
 713
 714         if (mask & IB_QP_DEST_QPN)
 715                 qp->attr.dest_qp_num = attr->dest_qp_num;
 716
 717         if (mask & IB_QP_STATE) {
 718                 qp->attr.qp_state = attr->qp_state;
 719
 720                 switch (attr->qp_state) {
 721                 case IB_QPS_RESET:
 722                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 723                         rxe_qp_reset(qp);
 724                         break;
 725
 726                 case IB_QPS_INIT:
 727                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 728                         qp->req.state = QP_STATE_INIT;
 729                         qp->resp.state = QP_STATE_INIT;
 730                         break;
 731
 732                 case IB_QPS_RTR:
 733                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 734                         qp->resp.state = QP_STATE_READY;
 735                         break;
 736
 737                 case IB_QPS_RTS:
 738                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 739                         qp->req.state = QP_STATE_READY;
 740                         break;
 741
 742                 case IB_QPS_SQD:
 743                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 744                         rxe_qp_drain(qp);
 745                         break;
 746
 747                 case IB_QPS_SQE:
 748                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 749                         /* Not possible from modify_qp. */
 750                         break;
 751
 752                 case IB_QPS_ERR:
 753                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 754                         rxe_qp_error(qp);
 755                         break;
 756                 }
 757         }
 758
 759         return 0;
 760 }
 761
 762 /* called by the query qp verb */
 763 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 764 {
 765         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 766
 767         *attr = qp->attr;
 768
 769         attr->rq_psn                            = qp->resp.psn;
 770         attr->sq_psn                            = qp->req.psn;
 771
 772         attr->cap.max_send_wr                   = qp->sq.max_wr;
 773         attr->cap.max_send_sge                  = qp->sq.max_sge;
 774         attr->cap.max_inline_data               = qp->sq.max_inline;
 775
 776         if (!qp->srq) {
 777                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 778                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 779         }
 780
 781         rxe_av_to_attr(rxe, &qp->pri_av, &attr->ah_attr);
 782         rxe_av_to_attr(rxe, &qp->alt_av, &attr->alt_ah_attr);
 783
 784         if (qp->req.state == QP_STATE_DRAIN) {
 785                 attr->sq_draining = 1;
 786                 /* applications that get this state
 787                  * typically spin on it. yield the
 788                  * processor
 789                  */
 790                 cond_resched();
 791         } else {
 792                 attr->sq_draining = 0;
 793         }
 794
 795         pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
 796
 797         return 0;
 798 }
 799
 800 /* called by the destroy qp verb */
 801 void rxe_qp_destroy(struct rxe_qp *qp)
 802 {
 803         qp->valid = 0;
 804         qp->qp_timeout_jiffies = 0;
 805         rxe_cleanup_task(&qp->resp.task);
 806
 807         del_timer_sync(&qp->retrans_timer);
 808         del_timer_sync(&qp->rnr_nak_timer);
 809
 810         rxe_cleanup_task(&qp->req.task);
 811         rxe_cleanup_task(&qp->comp.task);
 812
 813         /* flush out any receive wr's or pending requests */
 814         __rxe_do_task(&qp->req.task);
 815         if (qp->sq.queue) {
 816                 __rxe_do_task(&qp->comp.task);
 817                 __rxe_do_task(&qp->req.task);
 818         }
 819 }
 820
 821 /* called when the last reference to the qp is dropped */
 822 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
 823 {
 824         struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
 825
 826         rxe_drop_all_mcast_groups(qp);
 827
 828         if (qp->sq.queue)
 829                 rxe_queue_cleanup(qp->sq.queue);
 830
 831         if (qp->srq)
 832                 rxe_drop_ref(qp->srq);
 833
 834         if (qp->rq.queue)
 835                 rxe_queue_cleanup(qp->rq.queue);
 836
 837         if (qp->scq)
 838                 rxe_drop_ref(qp->scq);
 839         if (qp->rcq)
 840                 rxe_drop_ref(qp->rcq);
 841         if (qp->pd)
 842                 rxe_drop_ref(qp->pd);
 843
 844         if (qp->resp.mr) {
 845                 rxe_drop_ref(qp->resp.mr);
 846                 qp->resp.mr = NULL;
 847         }
 848
 849         free_rd_atomic_resources(qp);
 850
 851         kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 852         sock_release(qp->sk);
 853 }