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 (!rdma_is_port_valid(&rxe->ib_dev, port_num)) {
 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                 rxe_drop_ref(qp);
 155                 kfree_skb(res->atomic.skb);
 156         } else if (res->type == RXE_READ_MASK) {
 157                 if (res->read.mr)
 158                         rxe_drop_ref(res->read.mr);
 159         }
 160         res->type = 0;
 161 }
 162
 163 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
 164 {
 165         int i;
 166         struct resp_res *res;
 167
 168         if (qp->resp.resources) {
 169                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 170                         res = &qp->resp.resources[i];
 171                         free_rd_atomic_resource(qp, res);
 172                 }
 173         }
 174 }
 175
 176 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
 177                              struct ib_qp_init_attr *init)
 178 {
 179         struct rxe_port *port;
 180         u32 qpn;
 181
 182         qp->sq_sig_type         = init->sq_sig_type;
 183         qp->attr.path_mtu       = 1;
 184         qp->mtu                 = ib_mtu_enum_to_int(qp->attr.path_mtu);
 185
 186         qpn                     = qp->pelem.index;
 187         port                    = &rxe->port;
 188
 189         switch (init->qp_type) {
 190         case IB_QPT_SMI:
 191                 qp->ibqp.qp_num         = 0;
 192                 port->qp_smi_index      = qpn;
 193                 qp->attr.port_num       = init->port_num;
 194                 break;
 195
 196         case IB_QPT_GSI:
 197                 qp->ibqp.qp_num         = 1;
 198                 port->qp_gsi_index      = qpn;
 199                 qp->attr.port_num       = init->port_num;
 200                 break;
 201
 202         default:
 203                 qp->ibqp.qp_num         = qpn;
 204                 break;
 205         }
 206
 207         INIT_LIST_HEAD(&qp->grp_list);
 208
 209         skb_queue_head_init(&qp->send_pkts);
 210
 211         spin_lock_init(&qp->grp_lock);
 212         spin_lock_init(&qp->state_lock);
 213
 214         atomic_set(&qp->ssn, 0);
 215         atomic_set(&qp->skb_out, 0);
 216 }
 217
 218 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 219                            struct ib_qp_init_attr *init,
 220                            struct ib_ucontext *context,
 221                            struct rxe_create_qp_resp __user *uresp)
 222 {
 223         int err;
 224         int wqe_size;
 225
 226         err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
 227         if (err < 0)
 228                 return err;
 229         qp->sk->sk->sk_user_data = qp;
 230
 231         /* pick a source UDP port number for this QP based on
 232          * the source QPN. this spreads traffic for different QPs
 233          * across different NIC RX queues (while using a single
 234          * flow for a given QP to maintain packet order).
 235          * the port number must be in the Dynamic Ports range
 236          * (0xc000 - 0xffff).
 237          */
 238         qp->src_port = RXE_ROCE_V2_SPORT +
 239                 (hash_32_generic(qp_num(qp), 14) & 0x3fff);
 240
 241         qp->sq.max_wr           = init->cap.max_send_wr;
 242         qp->sq.max_sge          = init->cap.max_send_sge;
 243         qp->sq.max_inline       = init->cap.max_inline_data;
 244
 245         wqe_size = max_t(int, sizeof(struct rxe_send_wqe) +
 246                          qp->sq.max_sge * sizeof(struct ib_sge),
 247                          sizeof(struct rxe_send_wqe) +
 248                          qp->sq.max_inline);
 249
 250         qp->sq.queue = rxe_queue_init(rxe,
 251                                       &qp->sq.max_wr,
 252                                       wqe_size);
 253         if (!qp->sq.queue)
 254                 return -ENOMEM;
 255
 256         err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, context,
 257                            qp->sq.queue->buf, qp->sq.queue->buf_size,
 258                            &qp->sq.queue->ip);
 259
 260         if (err) {
 261                 vfree(qp->sq.queue->buf);
 262                 kfree(qp->sq.queue);
 263                 return err;
 264         }
 265
 266         qp->req.wqe_index       = producer_index(qp->sq.queue);
 267         qp->req.state           = QP_STATE_RESET;
 268         qp->req.opcode          = -1;
 269         qp->comp.opcode         = -1;
 270
 271         spin_lock_init(&qp->sq.sq_lock);
 272         skb_queue_head_init(&qp->req_pkts);
 273
 274         rxe_init_task(rxe, &qp->req.task, qp,
 275                       rxe_requester, "req");
 276         rxe_init_task(rxe, &qp->comp.task, qp,
 277                       rxe_completer, "comp");
 278
 279         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 280         if (init->qp_type == IB_QPT_RC) {
 281                 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
 282                 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 283         }
 284         return 0;
 285 }
 286
 287 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 288                             struct ib_qp_init_attr *init,
 289                             struct ib_ucontext *context,
 290                             struct rxe_create_qp_resp __user *uresp)
 291 {
 292         int err;
 293         int wqe_size;
 294
 295         if (!qp->srq) {
 296                 qp->rq.max_wr           = init->cap.max_recv_wr;
 297                 qp->rq.max_sge          = init->cap.max_recv_sge;
 298
 299                 wqe_size = rcv_wqe_size(qp->rq.max_sge);
 300
 301                 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
 302                          qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
 303
 304                 qp->rq.queue = rxe_queue_init(rxe,
 305                                               &qp->rq.max_wr,
 306                                               wqe_size);
 307                 if (!qp->rq.queue)
 308                         return -ENOMEM;
 309
 310                 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, context,
 311                                    qp->rq.queue->buf, qp->rq.queue->buf_size,
 312                                    &qp->rq.queue->ip);
 313                 if (err) {
 314                         vfree(qp->rq.queue->buf);
 315                         kfree(qp->rq.queue);
 316                         return err;
 317                 }
 318         }
 319
 320         spin_lock_init(&qp->rq.producer_lock);
 321         spin_lock_init(&qp->rq.consumer_lock);
 322
 323         skb_queue_head_init(&qp->resp_pkts);
 324
 325         rxe_init_task(rxe, &qp->resp.task, qp,
 326                       rxe_responder, "resp");
 327
 328         qp->resp.opcode         = OPCODE_NONE;
 329         qp->resp.msn            = 0;
 330         qp->resp.state          = QP_STATE_RESET;
 331
 332         return 0;
 333 }
 334
 335 /* called by the create qp verb */
 336 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 337                      struct ib_qp_init_attr *init,
 338                      struct rxe_create_qp_resp __user *uresp,
 339                      struct ib_pd *ibpd,
 340                      struct ib_udata *udata)
 341 {
 342         int err;
 343         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 344         struct rxe_cq *scq = to_rcq(init->send_cq);
 345         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 346         struct ib_ucontext *context = udata ? ibpd->uobject->context : NULL;
 347
 348         rxe_add_ref(pd);
 349         rxe_add_ref(rcq);
 350         rxe_add_ref(scq);
 351         if (srq)
 352                 rxe_add_ref(srq);
 353
 354         qp->pd                  = pd;
 355         qp->rcq                 = rcq;
 356         qp->scq                 = scq;
 357         qp->srq                 = srq;
 358
 359         rxe_qp_init_misc(rxe, qp, init);
 360
 361         err = rxe_qp_init_req(rxe, qp, init, context, uresp);
 362         if (err)
 363                 goto err1;
 364
 365         err = rxe_qp_init_resp(rxe, qp, init, context, uresp);
 366         if (err)
 367                 goto err2;
 368
 369         qp->attr.qp_state = IB_QPS_RESET;
 370         qp->valid = 1;
 371
 372         return 0;
 373
 374 err2:
 375         rxe_queue_cleanup(qp->sq.queue);
 376 err1:
 377         if (srq)
 378                 rxe_drop_ref(srq);
 379         rxe_drop_ref(scq);
 380         rxe_drop_ref(rcq);
 381         rxe_drop_ref(pd);
 382
 383         return err;
 384 }
 385
 386 /* called by the query qp verb */
 387 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 388 {
 389         init->event_handler             = qp->ibqp.event_handler;
 390         init->qp_context                = qp->ibqp.qp_context;
 391         init->send_cq                   = qp->ibqp.send_cq;
 392         init->recv_cq                   = qp->ibqp.recv_cq;
 393         init->srq                       = qp->ibqp.srq;
 394
 395         init->cap.max_send_wr           = qp->sq.max_wr;
 396         init->cap.max_send_sge          = qp->sq.max_sge;
 397         init->cap.max_inline_data       = qp->sq.max_inline;
 398
 399         if (!qp->srq) {
 400                 init->cap.max_recv_wr           = qp->rq.max_wr;
 401                 init->cap.max_recv_sge          = qp->rq.max_sge;
 402         }
 403
 404         init->sq_sig_type               = qp->sq_sig_type;
 405
 406         init->qp_type                   = qp->ibqp.qp_type;
 407         init->port_num                  = 1;
 408
 409         return 0;
 410 }
 411
 412 /* called by the modify qp verb, this routine checks all the parameters before
 413  * making any changes
 414  */
 415 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 416                     struct ib_qp_attr *attr, int mask)
 417 {
 418         enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
 419                                         attr->cur_qp_state : qp->attr.qp_state;
 420         enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
 421                                         attr->qp_state : cur_state;
 422
 423         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) {
 424                 pr_warn("invalid mask or state for qp\n");
 425                 goto err1;
 426         }
 427
 428         if (mask & IB_QP_STATE) {
 429                 if (cur_state == IB_QPS_SQD) {
 430                         if (qp->req.state == QP_STATE_DRAIN &&
 431                             new_state != IB_QPS_ERR)
 432                                 goto err1;
 433                 }
 434         }
 435
 436         if (mask & IB_QP_PORT) {
 437                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) {
 438                         pr_warn("invalid port %d\n", attr->port_num);
 439                         goto err1;
 440                 }
 441         }
 442
 443         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 444                 goto err1;
 445
 446         if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
 447                 goto err1;
 448
 449         if (mask & IB_QP_ALT_PATH) {
 450                 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
 451                         goto err1;
 452                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num))  {
 453                         pr_warn("invalid alt port %d\n", attr->alt_port_num);
 454                         goto err1;
 455                 }
 456                 if (attr->alt_timeout > 31) {
 457                         pr_warn("invalid QP alt timeout %d > 31\n",
 458                                 attr->alt_timeout);
 459                         goto err1;
 460                 }
 461         }
 462
 463         if (mask & IB_QP_PATH_MTU) {
 464                 struct rxe_port *port = &rxe->port;
 465
 466                 enum ib_mtu max_mtu = port->attr.max_mtu;
 467                 enum ib_mtu mtu = attr->path_mtu;
 468
 469                 if (mtu > max_mtu) {
 470                         pr_debug("invalid mtu (%d) > (%d)\n",
 471                                  ib_mtu_enum_to_int(mtu),
 472                                  ib_mtu_enum_to_int(max_mtu));
 473                         goto err1;
 474                 }
 475         }
 476
 477         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 478                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 479                         pr_warn("invalid max_rd_atomic %d > %d\n",
 480                                 attr->max_rd_atomic,
 481                                 rxe->attr.max_qp_rd_atom);
 482                         goto err1;
 483                 }
 484         }
 485
 486         if (mask & IB_QP_TIMEOUT) {
 487                 if (attr->timeout > 31) {
 488                         pr_warn("invalid QP timeout %d > 31\n",
 489                                 attr->timeout);
 490                         goto err1;
 491                 }
 492         }
 493
 494         return 0;
 495
 496 err1:
 497         return -EINVAL;
 498 }
 499
 500 /* move the qp to the reset state */
 501 static void rxe_qp_reset(struct rxe_qp *qp)
 502 {
 503         /* stop tasks from running */
 504         rxe_disable_task(&qp->resp.task);
 505
 506         /* stop request/comp */
 507         if (qp->sq.queue) {
 508                 if (qp_type(qp) == IB_QPT_RC)
 509                         rxe_disable_task(&qp->comp.task);
 510                 rxe_disable_task(&qp->req.task);
 511         }
 512
 513         /* move qp to the reset state */
 514         qp->req.state = QP_STATE_RESET;
 515         qp->resp.state = QP_STATE_RESET;
 516
 517         /* let state machines reset themselves drain work and packet queues
 518          * etc.
 519          */
 520         __rxe_do_task(&qp->resp.task);
 521
 522         if (qp->sq.queue) {
 523                 __rxe_do_task(&qp->comp.task);
 524                 __rxe_do_task(&qp->req.task);
 525                 rxe_queue_reset(qp->sq.queue);
 526         }
 527
 528         /* cleanup attributes */
 529         atomic_set(&qp->ssn, 0);
 530         qp->req.opcode = -1;
 531         qp->req.need_retry = 0;
 532         qp->req.noack_pkts = 0;
 533         qp->resp.msn = 0;
 534         qp->resp.opcode = -1;
 535         qp->resp.drop_msg = 0;
 536         qp->resp.goto_error = 0;
 537         qp->resp.sent_psn_nak = 0;
 538
 539         if (qp->resp.mr) {
 540                 rxe_drop_ref(qp->resp.mr);
 541                 qp->resp.mr = NULL;
 542         }
 543
 544         cleanup_rd_atomic_resources(qp);
 545
 546         /* reenable tasks */
 547         rxe_enable_task(&qp->resp.task);
 548
 549         if (qp->sq.queue) {
 550                 if (qp_type(qp) == IB_QPT_RC)
 551                         rxe_enable_task(&qp->comp.task);
 552
 553                 rxe_enable_task(&qp->req.task);
 554         }
 555 }
 556
 557 /* drain the send queue */
 558 static void rxe_qp_drain(struct rxe_qp *qp)
 559 {
 560         if (qp->sq.queue) {
 561                 if (qp->req.state != QP_STATE_DRAINED) {
 562                         qp->req.state = QP_STATE_DRAIN;
 563                         if (qp_type(qp) == IB_QPT_RC)
 564                                 rxe_run_task(&qp->comp.task, 1);
 565                         else
 566                                 __rxe_do_task(&qp->comp.task);
 567                         rxe_run_task(&qp->req.task, 1);
 568                 }
 569         }
 570 }
 571
 572 /* move the qp to the error state */
 573 void rxe_qp_error(struct rxe_qp *qp)
 574 {
 575         qp->req.state = QP_STATE_ERROR;
 576         qp->resp.state = QP_STATE_ERROR;
 577         qp->attr.qp_state = IB_QPS_ERR;
 578
 579         /* drain work and packet queues */
 580         rxe_run_task(&qp->resp.task, 1);
 581
 582         if (qp_type(qp) == IB_QPT_RC)
 583                 rxe_run_task(&qp->comp.task, 1);
 584         else
 585                 __rxe_do_task(&qp->comp.task);
 586         rxe_run_task(&qp->req.task, 1);
 587 }
 588
 589 /* called by the modify qp verb */
 590 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 591                      struct ib_udata *udata)
 592 {
 593         int err;
 594
 595         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 596                 int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
 597
 598                 qp->attr.max_rd_atomic = max_rd_atomic;
 599                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 600         }
 601
 602         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 603                 int max_dest_rd_atomic =
 604                         __roundup_pow_of_two(attr->max_dest_rd_atomic);
 605
 606                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 607
 608                 free_rd_atomic_resources(qp);
 609
 610                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 611                 if (err)
 612                         return err;
 613         }
 614
 615         if (mask & IB_QP_CUR_STATE)
 616                 qp->attr.cur_qp_state = attr->qp_state;
 617
 618         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 619                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 620
 621         if (mask & IB_QP_ACCESS_FLAGS)
 622                 qp->attr.qp_access_flags = attr->qp_access_flags;
 623
 624         if (mask & IB_QP_PKEY_INDEX)
 625                 qp->attr.pkey_index = attr->pkey_index;
 626
 627         if (mask & IB_QP_PORT)
 628                 qp->attr.port_num = attr->port_num;
 629
 630         if (mask & IB_QP_QKEY)
 631                 qp->attr.qkey = attr->qkey;
 632
 633         if (mask & IB_QP_AV) {
 634                 rxe_av_from_attr(attr->port_num, &qp->pri_av, &attr->ah_attr);
 635                 rxe_av_fill_ip_info(&qp->pri_av, &attr->ah_attr);
 636         }
 637
 638         if (mask & IB_QP_ALT_PATH) {
 639                 rxe_av_from_attr(attr->alt_port_num, &qp->alt_av,
 640                                  &attr->alt_ah_attr);
 641                 rxe_av_fill_ip_info(&qp->alt_av, &attr->alt_ah_attr);
 642                 qp->attr.alt_port_num = attr->alt_port_num;
 643                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 644                 qp->attr.alt_timeout = attr->alt_timeout;
 645         }
 646
 647         if (mask & IB_QP_PATH_MTU) {
 648                 qp->attr.path_mtu = attr->path_mtu;
 649                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 650         }
 651
 652         if (mask & IB_QP_TIMEOUT) {
 653                 qp->attr.timeout = attr->timeout;
 654                 if (attr->timeout == 0) {
 655                         qp->qp_timeout_jiffies = 0;
 656                 } else {
 657                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 658                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 659
 660                         qp->qp_timeout_jiffies = j ? j : 1;
 661                 }
 662         }
 663
 664         if (mask & IB_QP_RETRY_CNT) {
 665                 qp->attr.retry_cnt = attr->retry_cnt;
 666                 qp->comp.retry_cnt = attr->retry_cnt;
 667                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 668                          attr->retry_cnt);
 669         }
 670
 671         if (mask & IB_QP_RNR_RETRY) {
 672                 qp->attr.rnr_retry = attr->rnr_retry;
 673                 qp->comp.rnr_retry = attr->rnr_retry;
 674                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 675                          attr->rnr_retry);
 676         }
 677
 678         if (mask & IB_QP_RQ_PSN) {
 679                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 680                 qp->resp.psn = qp->attr.rq_psn;
 681                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 682                          qp->resp.psn);
 683         }
 684
 685         if (mask & IB_QP_MIN_RNR_TIMER) {
 686                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 687                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 688                          attr->min_rnr_timer);
 689         }
 690
 691         if (mask & IB_QP_SQ_PSN) {
 692                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 693                 qp->req.psn = qp->attr.sq_psn;
 694                 qp->comp.psn = qp->attr.sq_psn;
 695                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 696         }
 697
 698         if (mask & IB_QP_PATH_MIG_STATE)
 699                 qp->attr.path_mig_state = attr->path_mig_state;
 700
 701         if (mask & IB_QP_DEST_QPN)
 702                 qp->attr.dest_qp_num = attr->dest_qp_num;
 703
 704         if (mask & IB_QP_STATE) {
 705                 qp->attr.qp_state = attr->qp_state;
 706
 707                 switch (attr->qp_state) {
 708                 case IB_QPS_RESET:
 709                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 710                         rxe_qp_reset(qp);
 711                         break;
 712
 713                 case IB_QPS_INIT:
 714                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 715                         qp->req.state = QP_STATE_INIT;
 716                         qp->resp.state = QP_STATE_INIT;
 717                         break;
 718
 719                 case IB_QPS_RTR:
 720                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 721                         qp->resp.state = QP_STATE_READY;
 722                         break;
 723
 724                 case IB_QPS_RTS:
 725                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 726                         qp->req.state = QP_STATE_READY;
 727                         break;
 728
 729                 case IB_QPS_SQD:
 730                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 731                         rxe_qp_drain(qp);
 732                         break;
 733
 734                 case IB_QPS_SQE:
 735                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 736                         /* Not possible from modify_qp. */
 737                         break;
 738
 739                 case IB_QPS_ERR:
 740                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 741                         rxe_qp_error(qp);
 742                         break;
 743                 }
 744         }
 745
 746         return 0;
 747 }
 748
 749 /* called by the query qp verb */
 750 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 751 {
 752         *attr = qp->attr;
 753
 754         attr->rq_psn                            = qp->resp.psn;
 755         attr->sq_psn                            = qp->req.psn;
 756
 757         attr->cap.max_send_wr                   = qp->sq.max_wr;
 758         attr->cap.max_send_sge                  = qp->sq.max_sge;
 759         attr->cap.max_inline_data               = qp->sq.max_inline;
 760
 761         if (!qp->srq) {
 762                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 763                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 764         }
 765
 766         rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
 767         rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
 768
 769         if (qp->req.state == QP_STATE_DRAIN) {
 770                 attr->sq_draining = 1;
 771                 /* applications that get this state
 772                  * typically spin on it. yield the
 773                  * processor
 774                  */
 775                 cond_resched();
 776         } else {
 777                 attr->sq_draining = 0;
 778         }
 779
 780         pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
 781
 782         return 0;
 783 }
 784
 785 /* called by the destroy qp verb */
 786 void rxe_qp_destroy(struct rxe_qp *qp)
 787 {
 788         qp->valid = 0;
 789         qp->qp_timeout_jiffies = 0;
 790         rxe_cleanup_task(&qp->resp.task);
 791
 792         if (qp_type(qp) == IB_QPT_RC) {
 793                 del_timer_sync(&qp->retrans_timer);
 794                 del_timer_sync(&qp->rnr_nak_timer);
 795         }
 796
 797         rxe_cleanup_task(&qp->req.task);
 798         rxe_cleanup_task(&qp->comp.task);
 799
 800         /* flush out any receive wr's or pending requests */
 801         __rxe_do_task(&qp->req.task);
 802         if (qp->sq.queue) {
 803                 __rxe_do_task(&qp->comp.task);
 804                 __rxe_do_task(&qp->req.task);
 805         }
 806 }
 807
 808 /* called when the last reference to the qp is dropped */
 809 static void rxe_qp_do_cleanup(struct work_struct *work)
 810 {
 811         struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
 812
 813         rxe_drop_all_mcast_groups(qp);
 814
 815         if (qp->sq.queue)
 816                 rxe_queue_cleanup(qp->sq.queue);
 817
 818         if (qp->srq)
 819                 rxe_drop_ref(qp->srq);
 820
 821         if (qp->rq.queue)
 822                 rxe_queue_cleanup(qp->rq.queue);
 823
 824         if (qp->scq)
 825                 rxe_drop_ref(qp->scq);
 826         if (qp->rcq)
 827                 rxe_drop_ref(qp->rcq);
 828         if (qp->pd)
 829                 rxe_drop_ref(qp->pd);
 830
 831         if (qp->resp.mr) {
 832                 rxe_drop_ref(qp->resp.mr);
 833                 qp->resp.mr = NULL;
 834         }
 835
 836         if (qp_type(qp) == IB_QPT_RC)
 837                 sk_dst_reset(qp->sk->sk);
 838
 839         free_rd_atomic_resources(qp);
 840
 841         kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 842         sock_release(qp->sk);
 843 }
 844
 845 /* called when the last reference to the qp is dropped */
 846 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
 847 {
 848         struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
 849
 850         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 851 }