drivers/infiniband/sw/rxe/rxe_qp.c

   1 /*
   2  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   3  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *         Redistribution and use in source and binary forms, with or
  12  *         without modification, are permitted provided that the following
  13  *         conditions are met:
  14  *
  15  *              - Redistributions of source code must retain the above
  16  *                copyright notice, this list of conditions and the following
  17  *                disclaimer.
  18  *
  19  *              - Redistributions in binary form must reproduce the above
  20  *                copyright notice, this list of conditions and the following
  21  *                disclaimer in the documentation and/or other materials
  22  *                provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/skbuff.h>
  35 #include <linux/delay.h>
  36 #include <linux/sched.h>
  37 #include <linux/vmalloc.h>
  38
  39 #include "rxe.h"
  40 #include "rxe_loc.h"
  41 #include "rxe_queue.h"
  42 #include "rxe_task.h"
  43
  44 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
  45                           int has_srq)
  46 {
  47         if (cap->max_send_wr > rxe->attr.max_qp_wr) {
  48                 pr_warn("invalid send wr = %d > %d\n",
  49                         cap->max_send_wr, rxe->attr.max_qp_wr);
  50                 goto err1;
  51         }
  52
  53         if (cap->max_send_sge > rxe->attr.max_send_sge) {
  54                 pr_warn("invalid send sge = %d > %d\n",
  55                         cap->max_send_sge, rxe->attr.max_send_sge);
  56                 goto err1;
  57         }
  58
  59         if (!has_srq) {
  60                 if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
  61                         pr_warn("invalid recv wr = %d > %d\n",
  62                                 cap->max_recv_wr, rxe->attr.max_qp_wr);
  63                         goto err1;
  64                 }
  65
  66                 if (cap->max_recv_sge > rxe->attr.max_recv_sge) {
  67                         pr_warn("invalid recv sge = %d > %d\n",
  68                                 cap->max_recv_sge, rxe->attr.max_recv_sge);
  69                         goto err1;
  70                 }
  71         }
  72
  73         if (cap->max_inline_data > rxe->max_inline_data) {
  74                 pr_warn("invalid max inline data = %d > %d\n",
  75                         cap->max_inline_data, rxe->max_inline_data);
  76                 goto err1;
  77         }
  78
  79         return 0;
  80
  81 err1:
  82         return -EINVAL;
  83 }
  84
  85 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
  86 {
  87         struct ib_qp_cap *cap = &init->cap;
  88         struct rxe_port *port;
  89         int port_num = init->port_num;
  90
  91         if (!init->recv_cq || !init->send_cq) {
  92                 pr_warn("missing cq\n");
  93                 goto err1;
  94         }
  95
  96         if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
  97                 goto err1;
  98
  99         if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) {
 100                 if (port_num != 1) {
 101                         pr_warn("invalid port = %d\n", port_num);
 102                         goto err1;
 103                 }
 104
 105                 port = &rxe->port;
 106
 107                 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) {
 108                         pr_warn("SMI QP exists for port %d\n", port_num);
 109                         goto err1;
 110                 }
 111
 112                 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
 113                         pr_warn("GSI QP exists for port %d\n", port_num);
 114                         goto err1;
 115                 }
 116         }
 117
 118         return 0;
 119
 120 err1:
 121         return -EINVAL;
 122 }
 123
 124 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
 125 {
 126         qp->resp.res_head = 0;
 127         qp->resp.res_tail = 0;
 128         qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
 129
 130         if (!qp->resp.resources)
 131                 return -ENOMEM;
 132
 133         return 0;
 134 }
 135
 136 static void free_rd_atomic_resources(struct rxe_qp *qp)
 137 {
 138         if (qp->resp.resources) {
 139                 int i;
 140
 141                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 142                         struct resp_res *res = &qp->resp.resources[i];
 143
 144                         free_rd_atomic_resource(qp, res);
 145                 }
 146                 kfree(qp->resp.resources);
 147                 qp->resp.resources = NULL;
 148         }
 149 }
 150
 151 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res)
 152 {
 153         if (res->type == RXE_ATOMIC_MASK) {
 154                 kfree_skb(res->atomic.skb);
 155         } else if (res->type == RXE_READ_MASK) {
 156                 if (res->read.mr)
 157                         rxe_drop_ref(res->read.mr);
 158         }
 159         res->type = 0;
 160 }
 161
 162 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
 163 {
 164         int i;
 165         struct resp_res *res;
 166
 167         if (qp->resp.resources) {
 168                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 169                         res = &qp->resp.resources[i];
 170                         free_rd_atomic_resource(qp, res);
 171                 }
 172         }
 173 }
 174
 175 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
 176                              struct ib_qp_init_attr *init)
 177 {
 178         struct rxe_port *port;
 179         u32 qpn;
 180
 181         qp->sq_sig_type         = init->sq_sig_type;
 182         qp->attr.path_mtu       = 1;
 183         qp->mtu                 = ib_mtu_enum_to_int(qp->attr.path_mtu);
 184
 185         qpn                     = qp->pelem.index;
 186         port                    = &rxe->port;
 187
 188         switch (init->qp_type) {
 189         case IB_QPT_SMI:
 190                 qp->ibqp.qp_num         = 0;
 191                 port->qp_smi_index      = qpn;
 192                 qp->attr.port_num       = init->port_num;
 193                 break;
 194
 195         case IB_QPT_GSI:
 196                 qp->ibqp.qp_num         = 1;
 197                 port->qp_gsi_index      = qpn;
 198                 qp->attr.port_num       = init->port_num;
 199                 break;
 200
 201         default:
 202                 qp->ibqp.qp_num         = qpn;
 203                 break;
 204         }
 205
 206         INIT_LIST_HEAD(&qp->grp_list);
 207
 208         skb_queue_head_init(&qp->send_pkts);
 209
 210         spin_lock_init(&qp->grp_lock);
 211         spin_lock_init(&qp->state_lock);
 212
 213         atomic_set(&qp->ssn, 0);
 214         atomic_set(&qp->skb_out, 0);
 215 }
 216
 217 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 218                            struct ib_qp_init_attr *init,
 219                            struct ib_ucontext *context,
 220                            struct rxe_create_qp_resp __user *uresp)
 221 {
 222         int err;
 223         int wqe_size;
 224
 225         err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
 226         if (err < 0)
 227                 return err;
 228         qp->sk->sk->sk_user_data = qp;
 229
 230         qp->sq.max_wr           = init->cap.max_send_wr;
 231         qp->sq.max_sge          = init->cap.max_send_sge;
 232         qp->sq.max_inline       = init->cap.max_inline_data;
 233
 234         wqe_size = max_t(int, sizeof(struct rxe_send_wqe) +
 235                          qp->sq.max_sge * sizeof(struct ib_sge),
 236                          sizeof(struct rxe_send_wqe) +
 237                          qp->sq.max_inline);
 238
 239         qp->sq.queue = rxe_queue_init(rxe,
 240                                       &qp->sq.max_wr,
 241                                       wqe_size);
 242         if (!qp->sq.queue)
 243                 return -ENOMEM;
 244
 245         err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, context,
 246                            qp->sq.queue->buf, qp->sq.queue->buf_size,
 247                            &qp->sq.queue->ip);
 248
 249         if (err) {
 250                 vfree(qp->sq.queue->buf);
 251                 kfree(qp->sq.queue);
 252                 qp->sq.queue = NULL;
 253                 return err;
 254         }
 255
 256         qp->req.wqe_index       = producer_index(qp->sq.queue);
 257         qp->req.state           = QP_STATE_RESET;
 258         qp->req.opcode          = -1;
 259         qp->comp.opcode         = -1;
 260
 261         spin_lock_init(&qp->sq.sq_lock);
 262         skb_queue_head_init(&qp->req_pkts);
 263
 264         rxe_init_task(rxe, &qp->req.task, qp,
 265                       rxe_requester, "req");
 266         rxe_init_task(rxe, &qp->comp.task, qp,
 267                       rxe_completer, "comp");
 268
 269         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 270         if (init->qp_type == IB_QPT_RC) {
 271                 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
 272                 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 273         }
 274         return 0;
 275 }
 276
 277 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 278                             struct ib_qp_init_attr *init,
 279                             struct ib_ucontext *context,
 280                             struct rxe_create_qp_resp __user *uresp)
 281 {
 282         int err;
 283         int wqe_size;
 284
 285         if (!qp->srq) {
 286                 qp->rq.max_wr           = init->cap.max_recv_wr;
 287                 qp->rq.max_sge          = init->cap.max_recv_sge;
 288
 289                 wqe_size = rcv_wqe_size(qp->rq.max_sge);
 290
 291                 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
 292                          qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
 293
 294                 qp->rq.queue = rxe_queue_init(rxe,
 295                                               &qp->rq.max_wr,
 296                                               wqe_size);
 297                 if (!qp->rq.queue)
 298                         return -ENOMEM;
 299
 300                 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, context,
 301                                    qp->rq.queue->buf, qp->rq.queue->buf_size,
 302                                    &qp->rq.queue->ip);
 303                 if (err) {
 304                         vfree(qp->rq.queue->buf);
 305                         kfree(qp->rq.queue);
 306                         qp->rq.queue = NULL;
 307                         return err;
 308                 }
 309         }
 310
 311         spin_lock_init(&qp->rq.producer_lock);
 312         spin_lock_init(&qp->rq.consumer_lock);
 313
 314         skb_queue_head_init(&qp->resp_pkts);
 315
 316         rxe_init_task(rxe, &qp->resp.task, qp,
 317                       rxe_responder, "resp");
 318
 319         qp->resp.opcode         = OPCODE_NONE;
 320         qp->resp.msn            = 0;
 321         qp->resp.state          = QP_STATE_RESET;
 322
 323         return 0;
 324 }
 325
 326 /* called by the create qp verb */
 327 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 328                      struct ib_qp_init_attr *init,
 329                      struct rxe_create_qp_resp __user *uresp,
 330                      struct ib_pd *ibpd)
 331 {
 332         int err;
 333         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 334         struct rxe_cq *scq = to_rcq(init->send_cq);
 335         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 336         struct ib_ucontext *context = ibpd->uobject ? ibpd->uobject->context : NULL;
 337
 338         rxe_add_ref(pd);
 339         rxe_add_ref(rcq);
 340         rxe_add_ref(scq);
 341         if (srq)
 342                 rxe_add_ref(srq);
 343
 344         qp->pd                  = pd;
 345         qp->rcq                 = rcq;
 346         qp->scq                 = scq;
 347         qp->srq                 = srq;
 348
 349         rxe_qp_init_misc(rxe, qp, init);
 350
 351         err = rxe_qp_init_req(rxe, qp, init, context, uresp);
 352         if (err)
 353                 goto err1;
 354
 355         err = rxe_qp_init_resp(rxe, qp, init, context, uresp);
 356         if (err)
 357                 goto err2;
 358
 359         qp->attr.qp_state = IB_QPS_RESET;
 360         qp->valid = 1;
 361
 362         return 0;
 363
 364 err2:
 365         rxe_queue_cleanup(qp->sq.queue);
 366 err1:
 367         qp->pd = NULL;
 368         qp->rcq = NULL;
 369         qp->scq = NULL;
 370         qp->srq = NULL;
 371
 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
 591         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 592                 int max_rd_atomic = attr->max_rd_atomic ?
 593                         roundup_pow_of_two(attr->max_rd_atomic) : 0;
 594
 595                 qp->attr.max_rd_atomic = max_rd_atomic;
 596                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 597         }
 598
 599         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 600                 int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
 601                         roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
 602
 603                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 604
 605                 free_rd_atomic_resources(qp);
 606
 607                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 608                 if (err)
 609                         return err;
 610         }
 611
 612         if (mask & IB_QP_CUR_STATE)
 613                 qp->attr.cur_qp_state = attr->qp_state;
 614
 615         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 616                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 617
 618         if (mask & IB_QP_ACCESS_FLAGS)
 619                 qp->attr.qp_access_flags = attr->qp_access_flags;
 620
 621         if (mask & IB_QP_PKEY_INDEX)
 622                 qp->attr.pkey_index = attr->pkey_index;
 623
 624         if (mask & IB_QP_PORT)
 625                 qp->attr.port_num = attr->port_num;
 626
 627         if (mask & IB_QP_QKEY)
 628                 qp->attr.qkey = attr->qkey;
 629
 630         if (mask & IB_QP_AV) {
 631                 rxe_av_from_attr(attr->port_num, &qp->pri_av, &attr->ah_attr);
 632                 rxe_av_fill_ip_info(&qp->pri_av, &attr->ah_attr);
 633         }
 634
 635         if (mask & IB_QP_ALT_PATH) {
 636                 rxe_av_from_attr(attr->alt_port_num, &qp->alt_av,
 637                                  &attr->alt_ah_attr);
 638                 rxe_av_fill_ip_info(&qp->alt_av, &attr->alt_ah_attr);
 639                 qp->attr.alt_port_num = attr->alt_port_num;
 640                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 641                 qp->attr.alt_timeout = attr->alt_timeout;
 642         }
 643
 644         if (mask & IB_QP_PATH_MTU) {
 645                 qp->attr.path_mtu = attr->path_mtu;
 646                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 647         }
 648
 649         if (mask & IB_QP_TIMEOUT) {
 650                 qp->attr.timeout = attr->timeout;
 651                 if (attr->timeout == 0) {
 652                         qp->qp_timeout_jiffies = 0;
 653                 } else {
 654                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 655                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 656
 657                         qp->qp_timeout_jiffies = j ? j : 1;
 658                 }
 659         }
 660
 661         if (mask & IB_QP_RETRY_CNT) {
 662                 qp->attr.retry_cnt = attr->retry_cnt;
 663                 qp->comp.retry_cnt = attr->retry_cnt;
 664                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 665                          attr->retry_cnt);
 666         }
 667
 668         if (mask & IB_QP_RNR_RETRY) {
 669                 qp->attr.rnr_retry = attr->rnr_retry;
 670                 qp->comp.rnr_retry = attr->rnr_retry;
 671                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 672                          attr->rnr_retry);
 673         }
 674
 675         if (mask & IB_QP_RQ_PSN) {
 676                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 677                 qp->resp.psn = qp->attr.rq_psn;
 678                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 679                          qp->resp.psn);
 680         }
 681
 682         if (mask & IB_QP_MIN_RNR_TIMER) {
 683                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 684                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 685                          attr->min_rnr_timer);
 686         }
 687
 688         if (mask & IB_QP_SQ_PSN) {
 689                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 690                 qp->req.psn = qp->attr.sq_psn;
 691                 qp->comp.psn = qp->attr.sq_psn;
 692                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 693         }
 694
 695         if (mask & IB_QP_PATH_MIG_STATE)
 696                 qp->attr.path_mig_state = attr->path_mig_state;
 697
 698         if (mask & IB_QP_DEST_QPN)
 699                 qp->attr.dest_qp_num = attr->dest_qp_num;
 700
 701         if (mask & IB_QP_STATE) {
 702                 qp->attr.qp_state = attr->qp_state;
 703
 704                 switch (attr->qp_state) {
 705                 case IB_QPS_RESET:
 706                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 707                         rxe_qp_reset(qp);
 708                         break;
 709
 710                 case IB_QPS_INIT:
 711                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 712                         qp->req.state = QP_STATE_INIT;
 713                         qp->resp.state = QP_STATE_INIT;
 714                         break;
 715
 716                 case IB_QPS_RTR:
 717                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 718                         qp->resp.state = QP_STATE_READY;
 719                         break;
 720
 721                 case IB_QPS_RTS:
 722                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 723                         qp->req.state = QP_STATE_READY;
 724                         break;
 725
 726                 case IB_QPS_SQD:
 727                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 728                         rxe_qp_drain(qp);
 729                         break;
 730
 731                 case IB_QPS_SQE:
 732                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 733                         /* Not possible from modify_qp. */
 734                         break;
 735
 736                 case IB_QPS_ERR:
 737                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 738                         rxe_qp_error(qp);
 739                         break;
 740                 }
 741         }
 742
 743         return 0;
 744 }
 745
 746 /* called by the query qp verb */
 747 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 748 {
 749         *attr = qp->attr;
 750
 751         attr->rq_psn                            = qp->resp.psn;
 752         attr->sq_psn                            = qp->req.psn;
 753
 754         attr->cap.max_send_wr                   = qp->sq.max_wr;
 755         attr->cap.max_send_sge                  = qp->sq.max_sge;
 756         attr->cap.max_inline_data               = qp->sq.max_inline;
 757
 758         if (!qp->srq) {
 759                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 760                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 761         }
 762
 763         rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
 764         rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
 765
 766         if (qp->req.state == QP_STATE_DRAIN) {
 767                 attr->sq_draining = 1;
 768                 /* applications that get this state
 769                  * typically spin on it. yield the
 770                  * processor
 771                  */
 772                 cond_resched();
 773         } else {
 774                 attr->sq_draining = 0;
 775         }
 776
 777         pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
 778
 779         return 0;
 780 }
 781
 782 /* called by the destroy qp verb */
 783 void rxe_qp_destroy(struct rxe_qp *qp)
 784 {
 785         qp->valid = 0;
 786         qp->qp_timeout_jiffies = 0;
 787         rxe_cleanup_task(&qp->resp.task);
 788
 789         if (qp_type(qp) == IB_QPT_RC) {
 790                 del_timer_sync(&qp->retrans_timer);
 791                 del_timer_sync(&qp->rnr_nak_timer);
 792         }
 793
 794         rxe_cleanup_task(&qp->req.task);
 795         rxe_cleanup_task(&qp->comp.task);
 796
 797         /* flush out any receive wr's or pending requests */
 798         __rxe_do_task(&qp->req.task);
 799         if (qp->sq.queue) {
 800                 __rxe_do_task(&qp->comp.task);
 801                 __rxe_do_task(&qp->req.task);
 802         }
 803 }
 804
 805 /* called when the last reference to the qp is dropped */
 806 static void rxe_qp_do_cleanup(struct work_struct *work)
 807 {
 808         struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
 809
 810         rxe_drop_all_mcast_groups(qp);
 811
 812         if (qp->sq.queue)
 813                 rxe_queue_cleanup(qp->sq.queue);
 814
 815         if (qp->srq)
 816                 rxe_drop_ref(qp->srq);
 817
 818         if (qp->rq.queue)
 819                 rxe_queue_cleanup(qp->rq.queue);
 820
 821         if (qp->scq)
 822                 rxe_drop_ref(qp->scq);
 823         if (qp->rcq)
 824                 rxe_drop_ref(qp->rcq);
 825         if (qp->pd)
 826                 rxe_drop_ref(qp->pd);
 827
 828         if (qp->resp.mr) {
 829                 rxe_drop_ref(qp->resp.mr);
 830                 qp->resp.mr = NULL;
 831         }
 832
 833         if (qp_type(qp) == IB_QPT_RC)
 834                 sk_dst_reset(qp->sk->sk);
 835
 836         free_rd_atomic_resources(qp);
 837
 838         kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 839         sock_release(qp->sk);
 840 }
 841
 842 /* called when the last reference to the qp is dropped */
 843 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
 844 {
 845         struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
 846
 847         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 848 }