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                 rxe_dbg_dev(rxe, "invalid send wr = %u > %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                 rxe_dbg_dev(rxe, "invalid send sge = %u > %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                         rxe_dbg_dev(rxe, "invalid recv wr = %u > %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                         rxe_dbg_dev(rxe, "invalid recv sge = %u > %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                 rxe_dbg_dev(rxe, "invalid max inline data = %u > %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         switch (init->qp_type) {
  66         case IB_QPT_GSI:
  67         case IB_QPT_RC:
  68         case IB_QPT_UC:
  69         case IB_QPT_UD:
  70                 break;
  71         default:
  72                 return -EOPNOTSUPP;
  73         }
  74
  75         if (!init->recv_cq || !init->send_cq) {
  76                 rxe_dbg_dev(rxe, "missing cq\n");
  77                 goto err1;
  78         }
  79
  80         if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
  81                 goto err1;
  82
  83         if (init->qp_type == IB_QPT_GSI) {
  84                 if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) {
  85                         rxe_dbg_dev(rxe, "invalid port = %d\n", port_num);
  86                         goto err1;
  87                 }
  88
  89                 port = &rxe->port;
  90
  91                 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
  92                         rxe_dbg_dev(rxe, "GSI QP exists for port %d\n", port_num);
  93                         goto err1;
  94                 }
  95         }
  96
  97         return 0;
  98
  99 err1:
 100         return -EINVAL;
 101 }
 102
 103 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
 104 {
 105         qp->resp.res_head = 0;
 106         qp->resp.res_tail = 0;
 107         qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
 108
 109         if (!qp->resp.resources)
 110                 return -ENOMEM;
 111
 112         return 0;
 113 }
 114
 115 static void free_rd_atomic_resources(struct rxe_qp *qp)
 116 {
 117         if (qp->resp.resources) {
 118                 int i;
 119
 120                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 121                         struct resp_res *res = &qp->resp.resources[i];
 122
 123                         free_rd_atomic_resource(res);
 124                 }
 125                 kfree(qp->resp.resources);
 126                 qp->resp.resources = NULL;
 127         }
 128 }
 129
 130 void free_rd_atomic_resource(struct resp_res *res)
 131 {
 132         res->type = 0;
 133 }
 134
 135 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
 136 {
 137         int i;
 138         struct resp_res *res;
 139
 140         if (qp->resp.resources) {
 141                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 142                         res = &qp->resp.resources[i];
 143                         free_rd_atomic_resource(res);
 144                 }
 145         }
 146 }
 147
 148 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
 149                              struct ib_qp_init_attr *init)
 150 {
 151         struct rxe_port *port;
 152         u32 qpn;
 153
 154         qp->sq_sig_type         = init->sq_sig_type;
 155         qp->attr.path_mtu       = 1;
 156         qp->mtu                 = ib_mtu_enum_to_int(qp->attr.path_mtu);
 157
 158         qpn                     = qp->elem.index;
 159         port                    = &rxe->port;
 160
 161         switch (init->qp_type) {
 162         case IB_QPT_GSI:
 163                 qp->ibqp.qp_num         = 1;
 164                 port->qp_gsi_index      = qpn;
 165                 qp->attr.port_num       = init->port_num;
 166                 break;
 167
 168         default:
 169                 qp->ibqp.qp_num         = qpn;
 170                 break;
 171         }
 172
 173         spin_lock_init(&qp->state_lock);
 174
 175         spin_lock_init(&qp->sq.sq_lock);
 176         spin_lock_init(&qp->rq.producer_lock);
 177         spin_lock_init(&qp->rq.consumer_lock);
 178
 179         skb_queue_head_init(&qp->req_pkts);
 180         skb_queue_head_init(&qp->resp_pkts);
 181
 182         atomic_set(&qp->ssn, 0);
 183         atomic_set(&qp->skb_out, 0);
 184 }
 185
 186 static int rxe_init_sq(struct rxe_qp *qp, struct ib_qp_init_attr *init,
 187                        struct ib_udata *udata,
 188                        struct rxe_create_qp_resp __user *uresp)
 189 {
 190         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 191         int wqe_size;
 192         int err;
 193
 194         qp->sq.max_wr = init->cap.max_send_wr;
 195         wqe_size = max_t(int, init->cap.max_send_sge * sizeof(struct ib_sge),
 196                          init->cap.max_inline_data);
 197         qp->sq.max_sge = wqe_size / sizeof(struct ib_sge);
 198         qp->sq.max_inline = wqe_size;
 199         wqe_size += sizeof(struct rxe_send_wqe);
 200
 201         qp->sq.queue = rxe_queue_init(rxe, &qp->sq.max_wr, wqe_size,
 202                                       QUEUE_TYPE_FROM_CLIENT);
 203         if (!qp->sq.queue) {
 204                 rxe_err_qp(qp, "Unable to allocate send queue");
 205                 err = -ENOMEM;
 206                 goto err_out;
 207         }
 208
 209         /* prepare info for caller to mmap send queue if user space qp */
 210         err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata,
 211                            qp->sq.queue->buf, qp->sq.queue->buf_size,
 212                            &qp->sq.queue->ip);
 213         if (err) {
 214                 rxe_err_qp(qp, "do_mmap_info failed, err = %d", err);
 215                 goto err_free;
 216         }
 217
 218         /* return actual capabilities to caller which may be larger
 219          * than requested
 220          */
 221         init->cap.max_send_wr = qp->sq.max_wr;
 222         init->cap.max_send_sge = qp->sq.max_sge;
 223         init->cap.max_inline_data = qp->sq.max_inline;
 224
 225         return 0;
 226
 227 err_free:
 228         vfree(qp->sq.queue->buf);
 229         kfree(qp->sq.queue);
 230         qp->sq.queue = NULL;
 231 err_out:
 232         return err;
 233 }
 234
 235 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 236                            struct ib_qp_init_attr *init, struct ib_udata *udata,
 237                            struct rxe_create_qp_resp __user *uresp)
 238 {
 239         int err;
 240
 241         /* if we don't finish qp create make sure queue is valid */
 242         skb_queue_head_init(&qp->req_pkts);
 243
 244         err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
 245         if (err < 0)
 246                 return err;
 247         qp->sk->sk->sk_user_data = qp;
 248
 249         /* pick a source UDP port number for this QP based on
 250          * the source QPN. this spreads traffic for different QPs
 251          * across different NIC RX queues (while using a single
 252          * flow for a given QP to maintain packet order).
 253          * the port number must be in the Dynamic Ports range
 254          * (0xc000 - 0xffff).
 255          */
 256         qp->src_port = RXE_ROCE_V2_SPORT + (hash_32(qp_num(qp), 14) & 0x3fff);
 257
 258         err = rxe_init_sq(qp, init, udata, uresp);
 259         if (err)
 260                 return err;
 261
 262         qp->req.wqe_index = queue_get_producer(qp->sq.queue,
 263                                                QUEUE_TYPE_FROM_CLIENT);
 264
 265         qp->req.opcode          = -1;
 266         qp->comp.opcode         = -1;
 267
 268         rxe_init_task(&qp->req.task, qp, rxe_requester);
 269         rxe_init_task(&qp->comp.task, qp, rxe_completer);
 270
 271         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 272         if (init->qp_type == IB_QPT_RC) {
 273                 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
 274                 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 275         }
 276         return 0;
 277 }
 278
 279 static int rxe_init_rq(struct rxe_qp *qp, struct ib_qp_init_attr *init,
 280                        struct ib_udata *udata,
 281                        struct rxe_create_qp_resp __user *uresp)
 282 {
 283         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 284         int wqe_size;
 285         int err;
 286
 287         qp->rq.max_wr = init->cap.max_recv_wr;
 288         qp->rq.max_sge = init->cap.max_recv_sge;
 289         wqe_size = sizeof(struct rxe_recv_wqe) +
 290                                 qp->rq.max_sge*sizeof(struct ib_sge);
 291
 292         qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr, wqe_size,
 293                                       QUEUE_TYPE_FROM_CLIENT);
 294         if (!qp->rq.queue) {
 295                 rxe_err_qp(qp, "Unable to allocate recv queue");
 296                 err = -ENOMEM;
 297                 goto err_out;
 298         }
 299
 300         /* prepare info for caller to mmap recv queue if user space qp */
 301         err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata,
 302                            qp->rq.queue->buf, qp->rq.queue->buf_size,
 303                            &qp->rq.queue->ip);
 304         if (err) {
 305                 rxe_err_qp(qp, "do_mmap_info failed, err = %d", err);
 306                 goto err_free;
 307         }
 308
 309         /* return actual capabilities to caller which may be larger
 310          * than requested
 311          */
 312         init->cap.max_recv_wr = qp->rq.max_wr;
 313
 314         return 0;
 315
 316 err_free:
 317         vfree(qp->rq.queue->buf);
 318         kfree(qp->rq.queue);
 319         qp->rq.queue = NULL;
 320 err_out:
 321         return err;
 322 }
 323
 324 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 325                             struct ib_qp_init_attr *init,
 326                             struct ib_udata *udata,
 327                             struct rxe_create_qp_resp __user *uresp)
 328 {
 329         int err;
 330
 331         /* if we don't finish qp create make sure queue is valid */
 332         skb_queue_head_init(&qp->resp_pkts);
 333
 334         if (!qp->srq) {
 335                 err = rxe_init_rq(qp, init, udata, uresp);
 336                 if (err)
 337                         return err;
 338         }
 339
 340         rxe_init_task(&qp->resp.task, qp, rxe_responder);
 341
 342         qp->resp.opcode         = OPCODE_NONE;
 343         qp->resp.msn            = 0;
 344
 345         return 0;
 346 }
 347
 348 /* called by the create qp verb */
 349 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 350                      struct ib_qp_init_attr *init,
 351                      struct rxe_create_qp_resp __user *uresp,
 352                      struct ib_pd *ibpd,
 353                      struct ib_udata *udata)
 354 {
 355         int err;
 356         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 357         struct rxe_cq *scq = to_rcq(init->send_cq);
 358         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 359         unsigned long flags;
 360
 361         rxe_get(pd);
 362         rxe_get(rcq);
 363         rxe_get(scq);
 364         if (srq)
 365                 rxe_get(srq);
 366
 367         qp->pd = pd;
 368         qp->rcq = rcq;
 369         qp->scq = scq;
 370         qp->srq = srq;
 371
 372         atomic_inc(&rcq->num_wq);
 373         atomic_inc(&scq->num_wq);
 374
 375         rxe_qp_init_misc(rxe, qp, init);
 376
 377         err = rxe_qp_init_req(rxe, qp, init, udata, uresp);
 378         if (err)
 379                 goto err1;
 380
 381         err = rxe_qp_init_resp(rxe, qp, init, udata, uresp);
 382         if (err)
 383                 goto err2;
 384
 385         spin_lock_irqsave(&qp->state_lock, flags);
 386         qp->attr.qp_state = IB_QPS_RESET;
 387         qp->valid = 1;
 388         spin_unlock_irqrestore(&qp->state_lock, flags);
 389
 390         return 0;
 391
 392 err2:
 393         rxe_queue_cleanup(qp->sq.queue);
 394         qp->sq.queue = NULL;
 395 err1:
 396         atomic_dec(&rcq->num_wq);
 397         atomic_dec(&scq->num_wq);
 398
 399         qp->pd = NULL;
 400         qp->rcq = NULL;
 401         qp->scq = NULL;
 402         qp->srq = NULL;
 403
 404         if (srq)
 405                 rxe_put(srq);
 406         rxe_put(scq);
 407         rxe_put(rcq);
 408         rxe_put(pd);
 409
 410         return err;
 411 }
 412
 413 /* called by the query qp verb */
 414 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 415 {
 416         init->event_handler             = qp->ibqp.event_handler;
 417         init->qp_context                = qp->ibqp.qp_context;
 418         init->send_cq                   = qp->ibqp.send_cq;
 419         init->recv_cq                   = qp->ibqp.recv_cq;
 420         init->srq                       = qp->ibqp.srq;
 421
 422         init->cap.max_send_wr           = qp->sq.max_wr;
 423         init->cap.max_send_sge          = qp->sq.max_sge;
 424         init->cap.max_inline_data       = qp->sq.max_inline;
 425
 426         if (!qp->srq) {
 427                 init->cap.max_recv_wr           = qp->rq.max_wr;
 428                 init->cap.max_recv_sge          = qp->rq.max_sge;
 429         }
 430
 431         init->sq_sig_type               = qp->sq_sig_type;
 432
 433         init->qp_type                   = qp->ibqp.qp_type;
 434         init->port_num                  = 1;
 435
 436         return 0;
 437 }
 438
 439 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 440                     struct ib_qp_attr *attr, int mask)
 441 {
 442         if (mask & IB_QP_PORT) {
 443                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) {
 444                         rxe_dbg_qp(qp, "invalid port %d\n", attr->port_num);
 445                         goto err1;
 446                 }
 447         }
 448
 449         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 450                 goto err1;
 451
 452         if (mask & IB_QP_ACCESS_FLAGS) {
 453                 if (!(qp_type(qp) == IB_QPT_RC || qp_type(qp) == IB_QPT_UC))
 454                         goto err1;
 455                 if (attr->qp_access_flags & ~RXE_ACCESS_SUPPORTED_QP)
 456                         goto err1;
 457         }
 458
 459         if (mask & IB_QP_AV && rxe_av_chk_attr(qp, &attr->ah_attr))
 460                 goto err1;
 461
 462         if (mask & IB_QP_ALT_PATH) {
 463                 if (rxe_av_chk_attr(qp, &attr->alt_ah_attr))
 464                         goto err1;
 465                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num))  {
 466                         rxe_dbg_qp(qp, "invalid alt port %d\n", attr->alt_port_num);
 467                         goto err1;
 468                 }
 469                 if (attr->alt_timeout > 31) {
 470                         rxe_dbg_qp(qp, "invalid alt timeout %d > 31\n",
 471                                  attr->alt_timeout);
 472                         goto err1;
 473                 }
 474         }
 475
 476         if (mask & IB_QP_PATH_MTU) {
 477                 struct rxe_port *port = &rxe->port;
 478
 479                 enum ib_mtu max_mtu = port->attr.max_mtu;
 480                 enum ib_mtu mtu = attr->path_mtu;
 481
 482                 if (mtu > max_mtu) {
 483                         rxe_dbg_qp(qp, "invalid mtu (%d) > (%d)\n",
 484                                  ib_mtu_enum_to_int(mtu),
 485                                  ib_mtu_enum_to_int(max_mtu));
 486                         goto err1;
 487                 }
 488         }
 489
 490         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 491                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 492                         rxe_dbg_qp(qp, "invalid max_rd_atomic %d > %d\n",
 493                                  attr->max_rd_atomic,
 494                                  rxe->attr.max_qp_rd_atom);
 495                         goto err1;
 496                 }
 497         }
 498
 499         if (mask & IB_QP_TIMEOUT) {
 500                 if (attr->timeout > 31) {
 501                         rxe_dbg_qp(qp, "invalid timeout %d > 31\n",
 502                                         attr->timeout);
 503                         goto err1;
 504                 }
 505         }
 506
 507         return 0;
 508
 509 err1:
 510         return -EINVAL;
 511 }
 512
 513 /* move the qp to the reset state */
 514 static void rxe_qp_reset(struct rxe_qp *qp)
 515 {
 516         /* stop tasks from running */
 517         rxe_disable_task(&qp->resp.task);
 518         rxe_disable_task(&qp->comp.task);
 519         rxe_disable_task(&qp->req.task);
 520
 521         /* drain work and packet queuesc */
 522         rxe_requester(qp);
 523         rxe_completer(qp);
 524         rxe_responder(qp);
 525
 526         if (qp->rq.queue)
 527                 rxe_queue_reset(qp->rq.queue);
 528         if (qp->sq.queue)
 529                 rxe_queue_reset(qp->sq.queue);
 530
 531         /* cleanup attributes */
 532         atomic_set(&qp->ssn, 0);
 533         qp->req.opcode = -1;
 534         qp->req.need_retry = 0;
 535         qp->req.wait_for_rnr_timer = 0;
 536         qp->req.noack_pkts = 0;
 537         qp->resp.msn = 0;
 538         qp->resp.opcode = -1;
 539         qp->resp.drop_msg = 0;
 540         qp->resp.goto_error = 0;
 541         qp->resp.sent_psn_nak = 0;
 542
 543         if (qp->resp.mr) {
 544                 rxe_put(qp->resp.mr);
 545                 qp->resp.mr = NULL;
 546         }
 547
 548         cleanup_rd_atomic_resources(qp);
 549
 550         /* reenable tasks */
 551         rxe_enable_task(&qp->resp.task);
 552         rxe_enable_task(&qp->comp.task);
 553         rxe_enable_task(&qp->req.task);
 554 }
 555
 556 /* move the qp to the error state */
 557 void rxe_qp_error(struct rxe_qp *qp)
 558 {
 559         unsigned long flags;
 560
 561         spin_lock_irqsave(&qp->state_lock, flags);
 562         qp->attr.qp_state = IB_QPS_ERR;
 563
 564         /* drain work and packet queues */
 565         rxe_sched_task(&qp->resp.task);
 566         rxe_sched_task(&qp->comp.task);
 567         rxe_sched_task(&qp->req.task);
 568         spin_unlock_irqrestore(&qp->state_lock, flags);
 569 }
 570
 571 static void rxe_qp_sqd(struct rxe_qp *qp, struct ib_qp_attr *attr,
 572                        int mask)
 573 {
 574         unsigned long flags;
 575
 576         spin_lock_irqsave(&qp->state_lock, flags);
 577         qp->attr.sq_draining = 1;
 578         rxe_sched_task(&qp->comp.task);
 579         rxe_sched_task(&qp->req.task);
 580         spin_unlock_irqrestore(&qp->state_lock, flags);
 581 }
 582
 583 /* caller should hold qp->state_lock */
 584 static int __qp_chk_state(struct rxe_qp *qp, struct ib_qp_attr *attr,
 585                             int mask)
 586 {
 587         enum ib_qp_state cur_state;
 588         enum ib_qp_state new_state;
 589
 590         cur_state = (mask & IB_QP_CUR_STATE) ?
 591                                 attr->cur_qp_state : qp->attr.qp_state;
 592         new_state = (mask & IB_QP_STATE) ?
 593                                 attr->qp_state : cur_state;
 594
 595         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask))
 596                 return -EINVAL;
 597
 598         if (mask & IB_QP_STATE && cur_state == IB_QPS_SQD) {
 599                 if (qp->attr.sq_draining && new_state != IB_QPS_ERR)
 600                         return -EINVAL;
 601         }
 602
 603         return 0;
 604 }
 605
 606 static const char *const qps2str[] = {
 607         [IB_QPS_RESET]  = "RESET",
 608         [IB_QPS_INIT]   = "INIT",
 609         [IB_QPS_RTR]    = "RTR",
 610         [IB_QPS_RTS]    = "RTS",
 611         [IB_QPS_SQD]    = "SQD",
 612         [IB_QPS_SQE]    = "SQE",
 613         [IB_QPS_ERR]    = "ERR",
 614 };
 615
 616 /* called by the modify qp verb */
 617 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 618                      struct ib_udata *udata)
 619 {
 620         int err;
 621
 622         if (mask & IB_QP_CUR_STATE)
 623                 qp->attr.cur_qp_state = attr->qp_state;
 624
 625         if (mask & IB_QP_STATE) {
 626                 unsigned long flags;
 627
 628                 spin_lock_irqsave(&qp->state_lock, flags);
 629                 err = __qp_chk_state(qp, attr, mask);
 630                 if (!err) {
 631                         qp->attr.qp_state = attr->qp_state;
 632                         rxe_dbg_qp(qp, "state -> %s\n",
 633                                         qps2str[attr->qp_state]);
 634                 }
 635                 spin_unlock_irqrestore(&qp->state_lock, flags);
 636
 637                 if (err)
 638                         return err;
 639
 640                 switch (attr->qp_state) {
 641                 case IB_QPS_RESET:
 642                         rxe_qp_reset(qp);
 643                         break;
 644                 case IB_QPS_SQD:
 645                         rxe_qp_sqd(qp, attr, mask);
 646                         break;
 647                 case IB_QPS_ERR:
 648                         rxe_qp_error(qp);
 649                         break;
 650                 default:
 651                         break;
 652                 }
 653         }
 654
 655         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 656                 int max_rd_atomic = attr->max_rd_atomic ?
 657                         roundup_pow_of_two(attr->max_rd_atomic) : 0;
 658
 659                 qp->attr.max_rd_atomic = max_rd_atomic;
 660                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 661         }
 662
 663         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 664                 int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
 665                         roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
 666
 667                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 668
 669                 free_rd_atomic_resources(qp);
 670
 671                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 672                 if (err)
 673                         return err;
 674         }
 675
 676         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 677                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 678
 679         if (mask & IB_QP_ACCESS_FLAGS)
 680                 qp->attr.qp_access_flags = attr->qp_access_flags;
 681
 682         if (mask & IB_QP_PKEY_INDEX)
 683                 qp->attr.pkey_index = attr->pkey_index;
 684
 685         if (mask & IB_QP_PORT)
 686                 qp->attr.port_num = attr->port_num;
 687
 688         if (mask & IB_QP_QKEY)
 689                 qp->attr.qkey = attr->qkey;
 690
 691         if (mask & IB_QP_AV)
 692                 rxe_init_av(&attr->ah_attr, &qp->pri_av);
 693
 694         if (mask & IB_QP_ALT_PATH) {
 695                 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av);
 696                 qp->attr.alt_port_num = attr->alt_port_num;
 697                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 698                 qp->attr.alt_timeout = attr->alt_timeout;
 699         }
 700
 701         if (mask & IB_QP_PATH_MTU) {
 702                 qp->attr.path_mtu = attr->path_mtu;
 703                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 704         }
 705
 706         if (mask & IB_QP_TIMEOUT) {
 707                 qp->attr.timeout = attr->timeout;
 708                 if (attr->timeout == 0) {
 709                         qp->qp_timeout_jiffies = 0;
 710                 } else {
 711                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 712                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 713
 714                         qp->qp_timeout_jiffies = j ? j : 1;
 715                 }
 716         }
 717
 718         if (mask & IB_QP_RETRY_CNT) {
 719                 qp->attr.retry_cnt = attr->retry_cnt;
 720                 qp->comp.retry_cnt = attr->retry_cnt;
 721                 rxe_dbg_qp(qp, "set retry count = %d\n", attr->retry_cnt);
 722         }
 723
 724         if (mask & IB_QP_RNR_RETRY) {
 725                 qp->attr.rnr_retry = attr->rnr_retry;
 726                 qp->comp.rnr_retry = attr->rnr_retry;
 727                 rxe_dbg_qp(qp, "set rnr retry count = %d\n", attr->rnr_retry);
 728         }
 729
 730         if (mask & IB_QP_RQ_PSN) {
 731                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 732                 qp->resp.psn = qp->attr.rq_psn;
 733                 rxe_dbg_qp(qp, "set resp psn = 0x%x\n", qp->resp.psn);
 734         }
 735
 736         if (mask & IB_QP_MIN_RNR_TIMER) {
 737                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 738                 rxe_dbg_qp(qp, "set min rnr timer = 0x%x\n",
 739                          attr->min_rnr_timer);
 740         }
 741
 742         if (mask & IB_QP_SQ_PSN) {
 743                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 744                 qp->req.psn = qp->attr.sq_psn;
 745                 qp->comp.psn = qp->attr.sq_psn;
 746                 rxe_dbg_qp(qp, "set req psn = 0x%x\n", qp->req.psn);
 747         }
 748
 749         if (mask & IB_QP_PATH_MIG_STATE)
 750                 qp->attr.path_mig_state = attr->path_mig_state;
 751
 752         if (mask & IB_QP_DEST_QPN)
 753                 qp->attr.dest_qp_num = attr->dest_qp_num;
 754
 755         return 0;
 756 }
 757
 758 /* called by the query qp verb */
 759 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 760 {
 761         unsigned long flags;
 762
 763         *attr = qp->attr;
 764
 765         attr->rq_psn                            = qp->resp.psn;
 766         attr->sq_psn                            = qp->req.psn;
 767
 768         attr->cap.max_send_wr                   = qp->sq.max_wr;
 769         attr->cap.max_send_sge                  = qp->sq.max_sge;
 770         attr->cap.max_inline_data               = qp->sq.max_inline;
 771
 772         if (!qp->srq) {
 773                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 774                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 775         }
 776
 777         rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
 778         rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
 779
 780         /* Applications that get this state typically spin on it.
 781          * Yield the processor
 782          */
 783         spin_lock_irqsave(&qp->state_lock, flags);
 784         if (qp->attr.sq_draining) {
 785                 spin_unlock_irqrestore(&qp->state_lock, flags);
 786                 cond_resched();
 787         } else {
 788                 spin_unlock_irqrestore(&qp->state_lock, flags);
 789         }
 790
 791         return 0;
 792 }
 793
 794 int rxe_qp_chk_destroy(struct rxe_qp *qp)
 795 {
 796         /* See IBA o10-2.2.3
 797          * An attempt to destroy a QP while attached to a mcast group
 798          * will fail immediately.
 799          */
 800         if (atomic_read(&qp->mcg_num)) {
 801                 rxe_dbg_qp(qp, "Attempt to destroy while attached to multicast group\n");
 802                 return -EBUSY;
 803         }
 804
 805         return 0;
 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         unsigned long flags;
 813
 814         spin_lock_irqsave(&qp->state_lock, flags);
 815         qp->valid = 0;
 816         spin_unlock_irqrestore(&qp->state_lock, flags);
 817         qp->qp_timeout_jiffies = 0;
 818
 819         if (qp_type(qp) == IB_QPT_RC) {
 820                 del_timer_sync(&qp->retrans_timer);
 821                 del_timer_sync(&qp->rnr_nak_timer);
 822         }
 823
 824         if (qp->resp.task.func)
 825                 rxe_cleanup_task(&qp->resp.task);
 826
 827         if (qp->req.task.func)
 828                 rxe_cleanup_task(&qp->req.task);
 829
 830         if (qp->comp.task.func)
 831                 rxe_cleanup_task(&qp->comp.task);
 832
 833         /* flush out any receive wr's or pending requests */
 834         rxe_requester(qp);
 835         rxe_completer(qp);
 836         rxe_responder(qp);
 837
 838         if (qp->sq.queue)
 839                 rxe_queue_cleanup(qp->sq.queue);
 840
 841         if (qp->srq)
 842                 rxe_put(qp->srq);
 843
 844         if (qp->rq.queue)
 845                 rxe_queue_cleanup(qp->rq.queue);
 846
 847         if (qp->scq) {
 848                 atomic_dec(&qp->scq->num_wq);
 849                 rxe_put(qp->scq);
 850         }
 851
 852         if (qp->rcq) {
 853                 atomic_dec(&qp->rcq->num_wq);
 854                 rxe_put(qp->rcq);
 855         }
 856
 857         if (qp->pd)
 858                 rxe_put(qp->pd);
 859
 860         if (qp->resp.mr)
 861                 rxe_put(qp->resp.mr);
 862
 863         free_rd_atomic_resources(qp);
 864
 865         if (qp->sk) {
 866                 if (qp_type(qp) == IB_QPT_RC)
 867                         sk_dst_reset(qp->sk->sk);
 868
 869                 kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 870                 sock_release(qp->sk);
 871         }
 872 }
 873
 874 /* called when the last reference to the qp is dropped */
 875 void rxe_qp_cleanup(struct rxe_pool_elem *elem)
 876 {
 877         struct rxe_qp *qp = container_of(elem, typeof(*qp), elem);
 878
 879         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 880 }