drivers/infiniband/sw/rxe/rxe_qp.c

   1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
   2 /*
   3  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   4  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
   5  */
   6
   7 #include <linux/skbuff.h>
   8 #include <linux/delay.h>
   9 #include <linux/sched.h>
  10 #include <linux/vmalloc.h>
  11 #include <rdma/uverbs_ioctl.h>
  12
  13 #include "rxe.h"
  14 #include "rxe_loc.h"
  15 #include "rxe_queue.h"
  16 #include "rxe_task.h"
  17
  18 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
  19                           int has_srq)
  20 {
  21         if (cap->max_send_wr > rxe->attr.max_qp_wr) {
  22                 pr_warn("invalid send wr = %d > %d\n",
  23                         cap->max_send_wr, rxe->attr.max_qp_wr);
  24                 goto err1;
  25         }
  26
  27         if (cap->max_send_sge > rxe->attr.max_send_sge) {
  28                 pr_warn("invalid send sge = %d > %d\n",
  29                         cap->max_send_sge, rxe->attr.max_send_sge);
  30                 goto err1;
  31         }
  32
  33         if (!has_srq) {
  34                 if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
  35                         pr_warn("invalid recv wr = %d > %d\n",
  36                                 cap->max_recv_wr, rxe->attr.max_qp_wr);
  37                         goto err1;
  38                 }
  39
  40                 if (cap->max_recv_sge > rxe->attr.max_recv_sge) {
  41                         pr_warn("invalid recv sge = %d > %d\n",
  42                                 cap->max_recv_sge, rxe->attr.max_recv_sge);
  43                         goto err1;
  44                 }
  45         }
  46
  47         if (cap->max_inline_data > rxe->max_inline_data) {
  48                 pr_warn("invalid max inline data = %d > %d\n",
  49                         cap->max_inline_data, rxe->max_inline_data);
  50                 goto err1;
  51         }
  52
  53         return 0;
  54
  55 err1:
  56         return -EINVAL;
  57 }
  58
  59 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
  60 {
  61         struct ib_qp_cap *cap = &init->cap;
  62         struct rxe_port *port;
  63         int port_num = init->port_num;
  64
  65         if (!init->recv_cq || !init->send_cq) {
  66                 pr_warn("missing cq\n");
  67                 goto err1;
  68         }
  69
  70         if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
  71                 goto err1;
  72
  73         if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) {
  74                 if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) {
  75                         pr_warn("invalid port = %d\n", port_num);
  76                         goto err1;
  77                 }
  78
  79                 port = &rxe->port;
  80
  81                 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) {
  82                         pr_warn("SMI QP exists for port %d\n", port_num);
  83                         goto err1;
  84                 }
  85
  86                 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
  87                         pr_warn("GSI QP exists for port %d\n", port_num);
  88                         goto err1;
  89                 }
  90         }
  91
  92         return 0;
  93
  94 err1:
  95         return -EINVAL;
  96 }
  97
  98 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
  99 {
 100         qp->resp.res_head = 0;
 101         qp->resp.res_tail = 0;
 102         qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
 103
 104         if (!qp->resp.resources)
 105                 return -ENOMEM;
 106
 107         return 0;
 108 }
 109
 110 static void free_rd_atomic_resources(struct rxe_qp *qp)
 111 {
 112         if (qp->resp.resources) {
 113                 int i;
 114
 115                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 116                         struct resp_res *res = &qp->resp.resources[i];
 117
 118                         free_rd_atomic_resource(qp, res);
 119                 }
 120                 kfree(qp->resp.resources);
 121                 qp->resp.resources = NULL;
 122         }
 123 }
 124
 125 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res)
 126 {
 127         if (res->type == RXE_ATOMIC_MASK) {
 128                 kfree_skb(res->atomic.skb);
 129         } else if (res->type == RXE_READ_MASK) {
 130                 if (res->read.mr)
 131                         rxe_drop_ref(res->read.mr);
 132         }
 133         res->type = 0;
 134 }
 135
 136 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
 137 {
 138         int i;
 139         struct resp_res *res;
 140
 141         if (qp->resp.resources) {
 142                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 143                         res = &qp->resp.resources[i];
 144                         free_rd_atomic_resource(qp, res);
 145                 }
 146         }
 147 }
 148
 149 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
 150                              struct ib_qp_init_attr *init)
 151 {
 152         struct rxe_port *port;
 153         u32 qpn;
 154
 155         qp->sq_sig_type         = init->sq_sig_type;
 156         qp->attr.path_mtu       = 1;
 157         qp->mtu                 = ib_mtu_enum_to_int(qp->attr.path_mtu);
 158
 159         qpn                     = qp->pelem.index;
 160         port                    = &rxe->port;
 161
 162         switch (init->qp_type) {
 163         case IB_QPT_SMI:
 164                 qp->ibqp.qp_num         = 0;
 165                 port->qp_smi_index      = qpn;
 166                 qp->attr.port_num       = init->port_num;
 167                 break;
 168
 169         case IB_QPT_GSI:
 170                 qp->ibqp.qp_num         = 1;
 171                 port->qp_gsi_index      = qpn;
 172                 qp->attr.port_num       = init->port_num;
 173                 break;
 174
 175         default:
 176                 qp->ibqp.qp_num         = qpn;
 177                 break;
 178         }
 179
 180         INIT_LIST_HEAD(&qp->grp_list);
 181
 182         skb_queue_head_init(&qp->send_pkts);
 183
 184         spin_lock_init(&qp->grp_lock);
 185         spin_lock_init(&qp->state_lock);
 186
 187         spin_lock_init(&qp->req.task.state_lock);
 188         spin_lock_init(&qp->resp.task.state_lock);
 189         spin_lock_init(&qp->comp.task.state_lock);
 190
 191         spin_lock_init(&qp->sq.sq_lock);
 192         spin_lock_init(&qp->rq.producer_lock);
 193         spin_lock_init(&qp->rq.consumer_lock);
 194
 195         skb_queue_head_init(&qp->req_pkts);
 196         skb_queue_head_init(&qp->resp_pkts);
 197
 198         atomic_set(&qp->ssn, 0);
 199         atomic_set(&qp->skb_out, 0);
 200 }
 201
 202 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 203                            struct ib_qp_init_attr *init, struct ib_udata *udata,
 204                            struct rxe_create_qp_resp __user *uresp)
 205 {
 206         int err;
 207         int wqe_size;
 208
 209         err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
 210         if (err < 0)
 211                 return err;
 212         qp->sk->sk->sk_user_data = qp;
 213
 214         /* pick a source UDP port number for this QP based on
 215          * the source QPN. this spreads traffic for different QPs
 216          * across different NIC RX queues (while using a single
 217          * flow for a given QP to maintain packet order).
 218          * the port number must be in the Dynamic Ports range
 219          * (0xc000 - 0xffff).
 220          */
 221         qp->src_port = RXE_ROCE_V2_SPORT +
 222                 (hash_32_generic(qp_num(qp), 14) & 0x3fff);
 223         qp->sq.max_wr           = init->cap.max_send_wr;
 224
 225         /* These caps are limited by rxe_qp_chk_cap() done by the caller */
 226         wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge),
 227                          init->cap.max_inline_data);
 228         qp->sq.max_sge = init->cap.max_send_sge =
 229                 wqe_size / sizeof(struct ib_sge);
 230         qp->sq.max_inline = init->cap.max_inline_data = wqe_size;
 231         wqe_size += sizeof(struct rxe_send_wqe);
 232
 233         qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, wqe_size);
 234         if (!qp->sq.queue)
 235                 return -ENOMEM;
 236
 237         err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata,
 238                            qp->sq.queue->buf, qp->sq.queue->buf_size,
 239                            &qp->sq.queue->ip);
 240
 241         if (err) {
 242                 vfree(qp->sq.queue->buf);
 243                 kfree(qp->sq.queue);
 244                 qp->sq.queue = NULL;
 245                 return err;
 246         }
 247
 248         qp->req.wqe_index       = producer_index(qp->sq.queue);
 249         qp->req.state           = QP_STATE_RESET;
 250         qp->req.opcode          = -1;
 251         qp->comp.opcode         = -1;
 252
 253         rxe_init_task(&qp->req.task, qp, rxe_requester);
 254         rxe_init_task(&qp->comp.task, qp, rxe_completer);
 255
 256         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 257         if (init->qp_type == IB_QPT_RC) {
 258                 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
 259                 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 260         }
 261         return 0;
 262 }
 263
 264 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 265                             struct ib_qp_init_attr *init,
 266                             struct ib_udata *udata,
 267                             struct rxe_create_qp_resp __user *uresp)
 268 {
 269         int err;
 270         int wqe_size;
 271
 272         if (!qp->srq) {
 273                 qp->rq.max_wr           = init->cap.max_recv_wr;
 274                 qp->rq.max_sge          = init->cap.max_recv_sge;
 275
 276                 wqe_size = rcv_wqe_size(qp->rq.max_sge);
 277
 278                 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
 279                          qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
 280
 281                 qp->rq.queue = rxe_queue_init(rxe,
 282                                               &qp->rq.max_wr,
 283                                               wqe_size);
 284                 if (!qp->rq.queue)
 285                         return -ENOMEM;
 286
 287                 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata,
 288                                    qp->rq.queue->buf, qp->rq.queue->buf_size,
 289                                    &qp->rq.queue->ip);
 290                 if (err) {
 291                         vfree(qp->rq.queue->buf);
 292                         kfree(qp->rq.queue);
 293                         qp->rq.queue = NULL;
 294                         return err;
 295                 }
 296         }
 297
 298         rxe_init_task(&qp->resp.task, qp, rxe_responder);
 299
 300         qp->resp.opcode         = OPCODE_NONE;
 301         qp->resp.msn            = 0;
 302         qp->resp.state          = QP_STATE_RESET;
 303
 304         return 0;
 305 }
 306
 307 /* called by the create qp verb */
 308 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 309                      struct ib_qp_init_attr *init,
 310                      struct rxe_create_qp_resp __user *uresp,
 311                      struct ib_pd *ibpd,
 312                      struct ib_udata *udata)
 313 {
 314         int err;
 315         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 316         struct rxe_cq *scq = to_rcq(init->send_cq);
 317         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 318
 319         rxe_add_ref(pd);
 320         rxe_add_ref(rcq);
 321         rxe_add_ref(scq);
 322         if (srq)
 323                 rxe_add_ref(srq);
 324
 325         qp->pd                  = pd;
 326         qp->rcq                 = rcq;
 327         qp->scq                 = scq;
 328         qp->srq                 = srq;
 329
 330         rxe_qp_init_misc(rxe, qp, init);
 331
 332         err = rxe_qp_init_req(rxe, qp, init, udata, uresp);
 333         if (err)
 334                 goto err1;
 335
 336         err = rxe_qp_init_resp(rxe, qp, init, udata, uresp);
 337         if (err)
 338                 goto err2;
 339
 340         qp->attr.qp_state = IB_QPS_RESET;
 341         qp->valid = 1;
 342
 343         return 0;
 344
 345 err2:
 346         rxe_queue_cleanup(qp->sq.queue);
 347 err1:
 348         qp->pd = NULL;
 349         qp->rcq = NULL;
 350         qp->scq = NULL;
 351         qp->srq = NULL;
 352
 353         if (srq)
 354                 rxe_drop_ref(srq);
 355         rxe_drop_ref(scq);
 356         rxe_drop_ref(rcq);
 357         rxe_drop_ref(pd);
 358
 359         return err;
 360 }
 361
 362 /* called by the query qp verb */
 363 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 364 {
 365         init->event_handler             = qp->ibqp.event_handler;
 366         init->qp_context                = qp->ibqp.qp_context;
 367         init->send_cq                   = qp->ibqp.send_cq;
 368         init->recv_cq                   = qp->ibqp.recv_cq;
 369         init->srq                       = qp->ibqp.srq;
 370
 371         init->cap.max_send_wr           = qp->sq.max_wr;
 372         init->cap.max_send_sge          = qp->sq.max_sge;
 373         init->cap.max_inline_data       = qp->sq.max_inline;
 374
 375         if (!qp->srq) {
 376                 init->cap.max_recv_wr           = qp->rq.max_wr;
 377                 init->cap.max_recv_sge          = qp->rq.max_sge;
 378         }
 379
 380         init->sq_sig_type               = qp->sq_sig_type;
 381
 382         init->qp_type                   = qp->ibqp.qp_type;
 383         init->port_num                  = 1;
 384
 385         return 0;
 386 }
 387
 388 /* called by the modify qp verb, this routine checks all the parameters before
 389  * making any changes
 390  */
 391 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 392                     struct ib_qp_attr *attr, int mask)
 393 {
 394         enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
 395                                         attr->cur_qp_state : qp->attr.qp_state;
 396         enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
 397                                         attr->qp_state : cur_state;
 398
 399         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) {
 400                 pr_warn("invalid mask or state for qp\n");
 401                 goto err1;
 402         }
 403
 404         if (mask & IB_QP_STATE) {
 405                 if (cur_state == IB_QPS_SQD) {
 406                         if (qp->req.state == QP_STATE_DRAIN &&
 407                             new_state != IB_QPS_ERR)
 408                                 goto err1;
 409                 }
 410         }
 411
 412         if (mask & IB_QP_PORT) {
 413                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) {
 414                         pr_warn("invalid port %d\n", attr->port_num);
 415                         goto err1;
 416                 }
 417         }
 418
 419         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 420                 goto err1;
 421
 422         if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
 423                 goto err1;
 424
 425         if (mask & IB_QP_ALT_PATH) {
 426                 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
 427                         goto err1;
 428                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num))  {
 429                         pr_warn("invalid alt port %d\n", attr->alt_port_num);
 430                         goto err1;
 431                 }
 432                 if (attr->alt_timeout > 31) {
 433                         pr_warn("invalid QP alt timeout %d > 31\n",
 434                                 attr->alt_timeout);
 435                         goto err1;
 436                 }
 437         }
 438
 439         if (mask & IB_QP_PATH_MTU) {
 440                 struct rxe_port *port = &rxe->port;
 441
 442                 enum ib_mtu max_mtu = port->attr.max_mtu;
 443                 enum ib_mtu mtu = attr->path_mtu;
 444
 445                 if (mtu > max_mtu) {
 446                         pr_debug("invalid mtu (%d) > (%d)\n",
 447                                  ib_mtu_enum_to_int(mtu),
 448                                  ib_mtu_enum_to_int(max_mtu));
 449                         goto err1;
 450                 }
 451         }
 452
 453         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 454                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 455                         pr_warn("invalid max_rd_atomic %d > %d\n",
 456                                 attr->max_rd_atomic,
 457                                 rxe->attr.max_qp_rd_atom);
 458                         goto err1;
 459                 }
 460         }
 461
 462         if (mask & IB_QP_TIMEOUT) {
 463                 if (attr->timeout > 31) {
 464                         pr_warn("invalid QP timeout %d > 31\n",
 465                                 attr->timeout);
 466                         goto err1;
 467                 }
 468         }
 469
 470         return 0;
 471
 472 err1:
 473         return -EINVAL;
 474 }
 475
 476 /* move the qp to the reset state */
 477 static void rxe_qp_reset(struct rxe_qp *qp)
 478 {
 479         /* stop tasks from running */
 480         rxe_disable_task(&qp->resp.task);
 481
 482         /* stop request/comp */
 483         if (qp->sq.queue) {
 484                 if (qp_type(qp) == IB_QPT_RC)
 485                         rxe_disable_task(&qp->comp.task);
 486                 rxe_disable_task(&qp->req.task);
 487         }
 488
 489         /* move qp to the reset state */
 490         qp->req.state = QP_STATE_RESET;
 491         qp->resp.state = QP_STATE_RESET;
 492
 493         /* let state machines reset themselves drain work and packet queues
 494          * etc.
 495          */
 496         __rxe_do_task(&qp->resp.task);
 497
 498         if (qp->sq.queue) {
 499                 __rxe_do_task(&qp->comp.task);
 500                 __rxe_do_task(&qp->req.task);
 501                 rxe_queue_reset(qp->sq.queue);
 502         }
 503
 504         /* cleanup attributes */
 505         atomic_set(&qp->ssn, 0);
 506         qp->req.opcode = -1;
 507         qp->req.need_retry = 0;
 508         qp->req.noack_pkts = 0;
 509         qp->resp.msn = 0;
 510         qp->resp.opcode = -1;
 511         qp->resp.drop_msg = 0;
 512         qp->resp.goto_error = 0;
 513         qp->resp.sent_psn_nak = 0;
 514
 515         if (qp->resp.mr) {
 516                 rxe_drop_ref(qp->resp.mr);
 517                 qp->resp.mr = NULL;
 518         }
 519
 520         cleanup_rd_atomic_resources(qp);
 521
 522         /* reenable tasks */
 523         rxe_enable_task(&qp->resp.task);
 524
 525         if (qp->sq.queue) {
 526                 if (qp_type(qp) == IB_QPT_RC)
 527                         rxe_enable_task(&qp->comp.task);
 528
 529                 rxe_enable_task(&qp->req.task);
 530         }
 531 }
 532
 533 /* drain the send queue */
 534 static void rxe_qp_drain(struct rxe_qp *qp)
 535 {
 536         if (qp->sq.queue) {
 537                 if (qp->req.state != QP_STATE_DRAINED) {
 538                         qp->req.state = QP_STATE_DRAIN;
 539                         if (qp_type(qp) == IB_QPT_RC)
 540                                 rxe_run_task(&qp->comp.task, 1);
 541                         else
 542                                 __rxe_do_task(&qp->comp.task);
 543                         rxe_run_task(&qp->req.task, 1);
 544                 }
 545         }
 546 }
 547
 548 /* move the qp to the error state */
 549 void rxe_qp_error(struct rxe_qp *qp)
 550 {
 551         qp->req.state = QP_STATE_ERROR;
 552         qp->resp.state = QP_STATE_ERROR;
 553         qp->attr.qp_state = IB_QPS_ERR;
 554
 555         /* drain work and packet queues */
 556         rxe_run_task(&qp->resp.task, 1);
 557
 558         if (qp_type(qp) == IB_QPT_RC)
 559                 rxe_run_task(&qp->comp.task, 1);
 560         else
 561                 __rxe_do_task(&qp->comp.task);
 562         rxe_run_task(&qp->req.task, 1);
 563 }
 564
 565 /* called by the modify qp verb */
 566 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 567                      struct ib_udata *udata)
 568 {
 569         int err;
 570
 571         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 572                 int max_rd_atomic = attr->max_rd_atomic ?
 573                         roundup_pow_of_two(attr->max_rd_atomic) : 0;
 574
 575                 qp->attr.max_rd_atomic = max_rd_atomic;
 576                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 577         }
 578
 579         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 580                 int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
 581                         roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
 582
 583                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 584
 585                 free_rd_atomic_resources(qp);
 586
 587                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 588                 if (err)
 589                         return err;
 590         }
 591
 592         if (mask & IB_QP_CUR_STATE)
 593                 qp->attr.cur_qp_state = attr->qp_state;
 594
 595         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 596                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 597
 598         if (mask & IB_QP_ACCESS_FLAGS)
 599                 qp->attr.qp_access_flags = attr->qp_access_flags;
 600
 601         if (mask & IB_QP_PKEY_INDEX)
 602                 qp->attr.pkey_index = attr->pkey_index;
 603
 604         if (mask & IB_QP_PORT)
 605                 qp->attr.port_num = attr->port_num;
 606
 607         if (mask & IB_QP_QKEY)
 608                 qp->attr.qkey = attr->qkey;
 609
 610         if (mask & IB_QP_AV)
 611                 rxe_init_av(&attr->ah_attr, &qp->pri_av);
 612
 613         if (mask & IB_QP_ALT_PATH) {
 614                 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av);
 615                 qp->attr.alt_port_num = attr->alt_port_num;
 616                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 617                 qp->attr.alt_timeout = attr->alt_timeout;
 618         }
 619
 620         if (mask & IB_QP_PATH_MTU) {
 621                 qp->attr.path_mtu = attr->path_mtu;
 622                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 623         }
 624
 625         if (mask & IB_QP_TIMEOUT) {
 626                 qp->attr.timeout = attr->timeout;
 627                 if (attr->timeout == 0) {
 628                         qp->qp_timeout_jiffies = 0;
 629                 } else {
 630                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 631                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 632
 633                         qp->qp_timeout_jiffies = j ? j : 1;
 634                 }
 635         }
 636
 637         if (mask & IB_QP_RETRY_CNT) {
 638                 qp->attr.retry_cnt = attr->retry_cnt;
 639                 qp->comp.retry_cnt = attr->retry_cnt;
 640                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 641                          attr->retry_cnt);
 642         }
 643
 644         if (mask & IB_QP_RNR_RETRY) {
 645                 qp->attr.rnr_retry = attr->rnr_retry;
 646                 qp->comp.rnr_retry = attr->rnr_retry;
 647                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 648                          attr->rnr_retry);
 649         }
 650
 651         if (mask & IB_QP_RQ_PSN) {
 652                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 653                 qp->resp.psn = qp->attr.rq_psn;
 654                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 655                          qp->resp.psn);
 656         }
 657
 658         if (mask & IB_QP_MIN_RNR_TIMER) {
 659                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 660                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 661                          attr->min_rnr_timer);
 662         }
 663
 664         if (mask & IB_QP_SQ_PSN) {
 665                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 666                 qp->req.psn = qp->attr.sq_psn;
 667                 qp->comp.psn = qp->attr.sq_psn;
 668                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 669         }
 670
 671         if (mask & IB_QP_PATH_MIG_STATE)
 672                 qp->attr.path_mig_state = attr->path_mig_state;
 673
 674         if (mask & IB_QP_DEST_QPN)
 675                 qp->attr.dest_qp_num = attr->dest_qp_num;
 676
 677         if (mask & IB_QP_STATE) {
 678                 qp->attr.qp_state = attr->qp_state;
 679
 680                 switch (attr->qp_state) {
 681                 case IB_QPS_RESET:
 682                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 683                         rxe_qp_reset(qp);
 684                         break;
 685
 686                 case IB_QPS_INIT:
 687                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 688                         qp->req.state = QP_STATE_INIT;
 689                         qp->resp.state = QP_STATE_INIT;
 690                         break;
 691
 692                 case IB_QPS_RTR:
 693                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 694                         qp->resp.state = QP_STATE_READY;
 695                         break;
 696
 697                 case IB_QPS_RTS:
 698                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 699                         qp->req.state = QP_STATE_READY;
 700                         break;
 701
 702                 case IB_QPS_SQD:
 703                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 704                         rxe_qp_drain(qp);
 705                         break;
 706
 707                 case IB_QPS_SQE:
 708                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 709                         /* Not possible from modify_qp. */
 710                         break;
 711
 712                 case IB_QPS_ERR:
 713                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 714                         rxe_qp_error(qp);
 715                         break;
 716                 }
 717         }
 718
 719         return 0;
 720 }
 721
 722 /* called by the query qp verb */
 723 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 724 {
 725         *attr = qp->attr;
 726
 727         attr->rq_psn                            = qp->resp.psn;
 728         attr->sq_psn                            = qp->req.psn;
 729
 730         attr->cap.max_send_wr                   = qp->sq.max_wr;
 731         attr->cap.max_send_sge                  = qp->sq.max_sge;
 732         attr->cap.max_inline_data               = qp->sq.max_inline;
 733
 734         if (!qp->srq) {
 735                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 736                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 737         }
 738
 739         rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
 740         rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
 741
 742         if (qp->req.state == QP_STATE_DRAIN) {
 743                 attr->sq_draining = 1;
 744                 /* applications that get this state
 745                  * typically spin on it. yield the
 746                  * processor
 747                  */
 748                 cond_resched();
 749         } else {
 750                 attr->sq_draining = 0;
 751         }
 752
 753         pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
 754
 755         return 0;
 756 }
 757
 758 /* called by the destroy qp verb */
 759 void rxe_qp_destroy(struct rxe_qp *qp)
 760 {
 761         qp->valid = 0;
 762         qp->qp_timeout_jiffies = 0;
 763         rxe_cleanup_task(&qp->resp.task);
 764
 765         if (qp_type(qp) == IB_QPT_RC) {
 766                 del_timer_sync(&qp->retrans_timer);
 767                 del_timer_sync(&qp->rnr_nak_timer);
 768         }
 769
 770         rxe_cleanup_task(&qp->req.task);
 771         rxe_cleanup_task(&qp->comp.task);
 772
 773         /* flush out any receive wr's or pending requests */
 774         if (qp->req.task.func)
 775                 __rxe_do_task(&qp->req.task);
 776
 777         if (qp->sq.queue) {
 778                 __rxe_do_task(&qp->comp.task);
 779                 __rxe_do_task(&qp->req.task);
 780         }
 781 }
 782
 783 /* called when the last reference to the qp is dropped */
 784 static void rxe_qp_do_cleanup(struct work_struct *work)
 785 {
 786         struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
 787
 788         rxe_drop_all_mcast_groups(qp);
 789
 790         if (qp->sq.queue)
 791                 rxe_queue_cleanup(qp->sq.queue);
 792
 793         if (qp->srq)
 794                 rxe_drop_ref(qp->srq);
 795
 796         if (qp->rq.queue)
 797                 rxe_queue_cleanup(qp->rq.queue);
 798
 799         if (qp->scq)
 800                 rxe_drop_ref(qp->scq);
 801         if (qp->rcq)
 802                 rxe_drop_ref(qp->rcq);
 803         if (qp->pd)
 804                 rxe_drop_ref(qp->pd);
 805
 806         if (qp->resp.mr) {
 807                 rxe_drop_ref(qp->resp.mr);
 808                 qp->resp.mr = NULL;
 809         }
 810
 811         free_rd_atomic_resources(qp);
 812
 813         if (qp->sk) {
 814                 if (qp_type(qp) == IB_QPT_RC)
 815                         sk_dst_reset(qp->sk->sk);
 816
 817                 kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 818                 sock_release(qp->sk);
 819         }
 820 }
 821
 822 /* called when the last reference to the qp is dropped */
 823 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
 824 {
 825         struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
 826
 827         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 828 }