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