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         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 277         if (init->qp_type == IB_QPT_RC) {
 278                 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
 279                 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 280         }
 281         return 0;
 282 }
 283
 284 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 285                             struct ib_qp_init_attr *init,
 286                             struct ib_ucontext *context, struct ib_udata *udata)
 287 {
 288         int err;
 289         int wqe_size;
 290
 291         if (!qp->srq) {
 292                 qp->rq.max_wr           = init->cap.max_recv_wr;
 293                 qp->rq.max_sge          = init->cap.max_recv_sge;
 294
 295                 wqe_size = rcv_wqe_size(qp->rq.max_sge);
 296
 297                 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
 298                          qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
 299
 300                 qp->rq.queue = rxe_queue_init(rxe,
 301                                               &qp->rq.max_wr,
 302                                               wqe_size);
 303                 if (!qp->rq.queue)
 304                         return -ENOMEM;
 305
 306                 err = do_mmap_info(rxe, udata, false, context,
 307                                    qp->rq.queue->buf,
 308                                    qp->rq.queue->buf_size,
 309                                    &qp->rq.queue->ip);
 310                 if (err) {
 311                         kvfree(qp->rq.queue->buf);
 312                         kfree(qp->rq.queue);
 313                         return err;
 314                 }
 315         }
 316
 317         spin_lock_init(&qp->rq.producer_lock);
 318         spin_lock_init(&qp->rq.consumer_lock);
 319
 320         skb_queue_head_init(&qp->resp_pkts);
 321
 322         rxe_init_task(rxe, &qp->resp.task, qp,
 323                       rxe_responder, "resp");
 324
 325         qp->resp.opcode         = OPCODE_NONE;
 326         qp->resp.msn            = 0;
 327         qp->resp.state          = QP_STATE_RESET;
 328
 329         return 0;
 330 }
 331
 332 /* called by the create qp verb */
 333 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 334                      struct ib_qp_init_attr *init, struct ib_udata *udata,
 335                      struct ib_pd *ibpd)
 336 {
 337         int err;
 338         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 339         struct rxe_cq *scq = to_rcq(init->send_cq);
 340         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 341         struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
 342
 343         rxe_add_ref(pd);
 344         rxe_add_ref(rcq);
 345         rxe_add_ref(scq);
 346         if (srq)
 347                 rxe_add_ref(srq);
 348
 349         qp->pd                  = pd;
 350         qp->rcq                 = rcq;
 351         qp->scq                 = scq;
 352         qp->srq                 = srq;
 353
 354         rxe_qp_init_misc(rxe, qp, init);
 355
 356         err = rxe_qp_init_req(rxe, qp, init, context, udata);
 357         if (err)
 358                 goto err1;
 359
 360         err = rxe_qp_init_resp(rxe, qp, init, context, udata);
 361         if (err)
 362                 goto err2;
 363
 364         qp->attr.qp_state = IB_QPS_RESET;
 365         qp->valid = 1;
 366
 367         return 0;
 368
 369 err2:
 370         rxe_queue_cleanup(qp->sq.queue);
 371 err1:
 372         if (srq)
 373                 rxe_drop_ref(srq);
 374         rxe_drop_ref(scq);
 375         rxe_drop_ref(rcq);
 376         rxe_drop_ref(pd);
 377
 378         return err;
 379 }
 380
 381 /* called by the query qp verb */
 382 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 383 {
 384         init->event_handler             = qp->ibqp.event_handler;
 385         init->qp_context                = qp->ibqp.qp_context;
 386         init->send_cq                   = qp->ibqp.send_cq;
 387         init->recv_cq                   = qp->ibqp.recv_cq;
 388         init->srq                       = qp->ibqp.srq;
 389
 390         init->cap.max_send_wr           = qp->sq.max_wr;
 391         init->cap.max_send_sge          = qp->sq.max_sge;
 392         init->cap.max_inline_data       = qp->sq.max_inline;
 393
 394         if (!qp->srq) {
 395                 init->cap.max_recv_wr           = qp->rq.max_wr;
 396                 init->cap.max_recv_sge          = qp->rq.max_sge;
 397         }
 398
 399         init->sq_sig_type               = qp->sq_sig_type;
 400
 401         init->qp_type                   = qp->ibqp.qp_type;
 402         init->port_num                  = 1;
 403
 404         return 0;
 405 }
 406
 407 /* called by the modify qp verb, this routine checks all the parameters before
 408  * making any changes
 409  */
 410 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 411                     struct ib_qp_attr *attr, int mask)
 412 {
 413         enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
 414                                         attr->cur_qp_state : qp->attr.qp_state;
 415         enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
 416                                         attr->qp_state : cur_state;
 417
 418         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask,
 419                                 IB_LINK_LAYER_ETHERNET)) {
 420                 pr_warn("invalid mask or state for qp\n");
 421                 goto err1;
 422         }
 423
 424         if (mask & IB_QP_STATE) {
 425                 if (cur_state == IB_QPS_SQD) {
 426                         if (qp->req.state == QP_STATE_DRAIN &&
 427                             new_state != IB_QPS_ERR)
 428                                 goto err1;
 429                 }
 430         }
 431
 432         if (mask & IB_QP_PORT) {
 433                 if (attr->port_num != 1) {
 434                         pr_warn("invalid port %d\n", attr->port_num);
 435                         goto err1;
 436                 }
 437         }
 438
 439         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 440                 goto err1;
 441
 442         if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
 443                 goto err1;
 444
 445         if (mask & IB_QP_ALT_PATH) {
 446                 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
 447                         goto err1;
 448                 if (attr->alt_port_num != 1) {
 449                         pr_warn("invalid alt port %d\n", attr->alt_port_num);
 450                         goto err1;
 451                 }
 452                 if (attr->alt_timeout > 31) {
 453                         pr_warn("invalid QP alt timeout %d > 31\n",
 454                                 attr->alt_timeout);
 455                         goto err1;
 456                 }
 457         }
 458
 459         if (mask & IB_QP_PATH_MTU) {
 460                 struct rxe_port *port = &rxe->port;
 461
 462                 enum ib_mtu max_mtu = port->attr.max_mtu;
 463                 enum ib_mtu mtu = attr->path_mtu;
 464
 465                 if (mtu > max_mtu) {
 466                         pr_debug("invalid mtu (%d) > (%d)\n",
 467                                  ib_mtu_enum_to_int(mtu),
 468                                  ib_mtu_enum_to_int(max_mtu));
 469                         goto err1;
 470                 }
 471         }
 472
 473         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 474                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 475                         pr_warn("invalid max_rd_atomic %d > %d\n",
 476                                 attr->max_rd_atomic,
 477                                 rxe->attr.max_qp_rd_atom);
 478                         goto err1;
 479                 }
 480         }
 481
 482         if (mask & IB_QP_TIMEOUT) {
 483                 if (attr->timeout > 31) {
 484                         pr_warn("invalid QP timeout %d > 31\n",
 485                                 attr->timeout);
 486                         goto err1;
 487                 }
 488         }
 489
 490         return 0;
 491
 492 err1:
 493         return -EINVAL;
 494 }
 495
 496 /* move the qp to the reset state */
 497 static void rxe_qp_reset(struct rxe_qp *qp)
 498 {
 499         /* stop tasks from running */
 500         rxe_disable_task(&qp->resp.task);
 501
 502         /* stop request/comp */
 503         if (qp->sq.queue) {
 504                 if (qp_type(qp) == IB_QPT_RC)
 505                         rxe_disable_task(&qp->comp.task);
 506                 rxe_disable_task(&qp->req.task);
 507         }
 508
 509         /* move qp to the reset state */
 510         qp->req.state = QP_STATE_RESET;
 511         qp->resp.state = QP_STATE_RESET;
 512
 513         /* let state machines reset themselves drain work and packet queues
 514          * etc.
 515          */
 516         __rxe_do_task(&qp->resp.task);
 517
 518         if (qp->sq.queue) {
 519                 __rxe_do_task(&qp->comp.task);
 520                 __rxe_do_task(&qp->req.task);
 521                 rxe_queue_reset(qp->sq.queue);
 522         }
 523
 524         /* cleanup attributes */
 525         atomic_set(&qp->ssn, 0);
 526         qp->req.opcode = -1;
 527         qp->req.need_retry = 0;
 528         qp->req.noack_pkts = 0;
 529         qp->resp.msn = 0;
 530         qp->resp.opcode = -1;
 531         qp->resp.drop_msg = 0;
 532         qp->resp.goto_error = 0;
 533         qp->resp.sent_psn_nak = 0;
 534
 535         if (qp->resp.mr) {
 536                 rxe_drop_ref(qp->resp.mr);
 537                 qp->resp.mr = NULL;
 538         }
 539
 540         cleanup_rd_atomic_resources(qp);
 541
 542         /* reenable tasks */
 543         rxe_enable_task(&qp->resp.task);
 544
 545         if (qp->sq.queue) {
 546                 if (qp_type(qp) == IB_QPT_RC)
 547                         rxe_enable_task(&qp->comp.task);
 548
 549                 rxe_enable_task(&qp->req.task);
 550         }
 551 }
 552
 553 /* drain the send queue */
 554 static void rxe_qp_drain(struct rxe_qp *qp)
 555 {
 556         if (qp->sq.queue) {
 557                 if (qp->req.state != QP_STATE_DRAINED) {
 558                         qp->req.state = QP_STATE_DRAIN;
 559                         if (qp_type(qp) == IB_QPT_RC)
 560                                 rxe_run_task(&qp->comp.task, 1);
 561                         else
 562                                 __rxe_do_task(&qp->comp.task);
 563                         rxe_run_task(&qp->req.task, 1);
 564                 }
 565         }
 566 }
 567
 568 /* move the qp to the error state */
 569 void rxe_qp_error(struct rxe_qp *qp)
 570 {
 571         qp->req.state = QP_STATE_ERROR;
 572         qp->resp.state = QP_STATE_ERROR;
 573         qp->attr.qp_state = IB_QPS_ERR;
 574
 575         /* drain work and packet queues */
 576         rxe_run_task(&qp->resp.task, 1);
 577
 578         if (qp_type(qp) == IB_QPT_RC)
 579                 rxe_run_task(&qp->comp.task, 1);
 580         else
 581                 __rxe_do_task(&qp->comp.task);
 582         rxe_run_task(&qp->req.task, 1);
 583 }
 584
 585 /* called by the modify qp verb */
 586 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 587                      struct ib_udata *udata)
 588 {
 589         int err;
 590         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 591         union ib_gid sgid;
 592         struct ib_gid_attr sgid_attr;
 593
 594         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 595                 int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
 596
 597                 qp->attr.max_rd_atomic = max_rd_atomic;
 598                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 599         }
 600
 601         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 602                 int max_dest_rd_atomic =
 603                         __roundup_pow_of_two(attr->max_dest_rd_atomic);
 604
 605                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 606
 607                 free_rd_atomic_resources(qp);
 608
 609                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 610                 if (err)
 611                         return err;
 612         }
 613
 614         if (mask & IB_QP_CUR_STATE)
 615                 qp->attr.cur_qp_state = attr->qp_state;
 616
 617         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 618                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 619
 620         if (mask & IB_QP_ACCESS_FLAGS)
 621                 qp->attr.qp_access_flags = attr->qp_access_flags;
 622
 623         if (mask & IB_QP_PKEY_INDEX)
 624                 qp->attr.pkey_index = attr->pkey_index;
 625
 626         if (mask & IB_QP_PORT)
 627                 qp->attr.port_num = attr->port_num;
 628
 629         if (mask & IB_QP_QKEY)
 630                 qp->attr.qkey = attr->qkey;
 631
 632         if (mask & IB_QP_AV) {
 633                 ib_get_cached_gid(&rxe->ib_dev, 1,
 634                                   rdma_ah_read_grh(&attr->ah_attr)->sgid_index,
 635                                   &sgid, &sgid_attr);
 636                 rxe_av_from_attr(attr->port_num, &qp->pri_av, &attr->ah_attr);
 637                 rxe_av_fill_ip_info(&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                 u8 sgid_index =
 645                         rdma_ah_read_grh(&attr->alt_ah_attr)->sgid_index;
 646
 647                 ib_get_cached_gid(&rxe->ib_dev, 1, sgid_index,
 648                                   &sgid, &sgid_attr);
 649
 650                 rxe_av_from_attr(attr->alt_port_num, &qp->alt_av,
 651                                  &attr->alt_ah_attr);
 652                 rxe_av_fill_ip_info(&qp->alt_av, &attr->alt_ah_attr,
 653                                     &sgid_attr, &sgid);
 654                 if (sgid_attr.ndev)
 655                         dev_put(sgid_attr.ndev);
 656
 657                 qp->attr.alt_port_num = attr->alt_port_num;
 658                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 659                 qp->attr.alt_timeout = attr->alt_timeout;
 660         }
 661
 662         if (mask & IB_QP_PATH_MTU) {
 663                 qp->attr.path_mtu = attr->path_mtu;
 664                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 665         }
 666
 667         if (mask & IB_QP_TIMEOUT) {
 668                 qp->attr.timeout = attr->timeout;
 669                 if (attr->timeout == 0) {
 670                         qp->qp_timeout_jiffies = 0;
 671                 } else {
 672                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 673                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 674
 675                         qp->qp_timeout_jiffies = j ? j : 1;
 676                 }
 677         }
 678
 679         if (mask & IB_QP_RETRY_CNT) {
 680                 qp->attr.retry_cnt = attr->retry_cnt;
 681                 qp->comp.retry_cnt = attr->retry_cnt;
 682                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 683                          attr->retry_cnt);
 684         }
 685
 686         if (mask & IB_QP_RNR_RETRY) {
 687                 qp->attr.rnr_retry = attr->rnr_retry;
 688                 qp->comp.rnr_retry = attr->rnr_retry;
 689                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 690                          attr->rnr_retry);
 691         }
 692
 693         if (mask & IB_QP_RQ_PSN) {
 694                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 695                 qp->resp.psn = qp->attr.rq_psn;
 696                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 697                          qp->resp.psn);
 698         }
 699
 700         if (mask & IB_QP_MIN_RNR_TIMER) {
 701                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 702                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 703                          attr->min_rnr_timer);
 704         }
 705
 706         if (mask & IB_QP_SQ_PSN) {
 707                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 708                 qp->req.psn = qp->attr.sq_psn;
 709                 qp->comp.psn = qp->attr.sq_psn;
 710                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 711         }
 712
 713         if (mask & IB_QP_PATH_MIG_STATE)
 714                 qp->attr.path_mig_state = attr->path_mig_state;
 715
 716         if (mask & IB_QP_DEST_QPN)
 717                 qp->attr.dest_qp_num = attr->dest_qp_num;
 718
 719         if (mask & IB_QP_STATE) {
 720                 qp->attr.qp_state = attr->qp_state;
 721
 722                 switch (attr->qp_state) {
 723                 case IB_QPS_RESET:
 724                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 725                         rxe_qp_reset(qp);
 726                         break;
 727
 728                 case IB_QPS_INIT:
 729                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 730                         qp->req.state = QP_STATE_INIT;
 731                         qp->resp.state = QP_STATE_INIT;
 732                         break;
 733
 734                 case IB_QPS_RTR:
 735                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 736                         qp->resp.state = QP_STATE_READY;
 737                         break;
 738
 739                 case IB_QPS_RTS:
 740                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 741                         qp->req.state = QP_STATE_READY;
 742                         break;
 743
 744                 case IB_QPS_SQD:
 745                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 746                         rxe_qp_drain(qp);
 747                         break;
 748
 749                 case IB_QPS_SQE:
 750                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 751                         /* Not possible from modify_qp. */
 752                         break;
 753
 754                 case IB_QPS_ERR:
 755                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 756                         rxe_qp_error(qp);
 757                         break;
 758                 }
 759         }
 760
 761         return 0;
 762 }
 763
 764 /* called by the query qp verb */
 765 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 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(&qp->pri_av, &attr->ah_attr);
 782         rxe_av_to_attr(&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         if (qp_type(qp) == IB_QPT_RC) {
 808                 del_timer_sync(&qp->retrans_timer);
 809                 del_timer_sync(&qp->rnr_nak_timer);
 810         }
 811
 812         rxe_cleanup_task(&qp->req.task);
 813         rxe_cleanup_task(&qp->comp.task);
 814
 815         /* flush out any receive wr's or pending requests */
 816         __rxe_do_task(&qp->req.task);
 817         if (qp->sq.queue) {
 818                 __rxe_do_task(&qp->comp.task);
 819                 __rxe_do_task(&qp->req.task);
 820         }
 821 }
 822
 823 /* called when the last reference to the qp is dropped */
 824 static void rxe_qp_do_cleanup(struct work_struct *work)
 825 {
 826         struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
 827
 828         rxe_drop_all_mcast_groups(qp);
 829
 830         if (qp->sq.queue)
 831                 rxe_queue_cleanup(qp->sq.queue);
 832
 833         if (qp->srq)
 834                 rxe_drop_ref(qp->srq);
 835
 836         if (qp->rq.queue)
 837                 rxe_queue_cleanup(qp->rq.queue);
 838
 839         if (qp->scq)
 840                 rxe_drop_ref(qp->scq);
 841         if (qp->rcq)
 842                 rxe_drop_ref(qp->rcq);
 843         if (qp->pd)
 844                 rxe_drop_ref(qp->pd);
 845
 846         if (qp->resp.mr) {
 847                 rxe_drop_ref(qp->resp.mr);
 848                 qp->resp.mr = NULL;
 849         }
 850
 851         if (qp_type(qp) == IB_QPT_RC)
 852                 sk_dst_reset(qp->sk->sk);
 853
 854         free_rd_atomic_resources(qp);
 855
 856         kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 857         sock_release(qp->sk);
 858 }
 859
 860 /* called when the last reference to the qp is dropped */
 861 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
 862 {
 863         struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
 864
 865         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 866 }