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\n");
 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\n", 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 = (void *)(uintptr_t)qp->elem.index;
 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->send_task, qp, rxe_sender);
 269
 270         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 271         if (init->qp_type == IB_QPT_RC) {
 272                 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
 273                 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 274         }
 275         return 0;
 276 }
 277
 278 static int rxe_init_rq(struct rxe_qp *qp, struct ib_qp_init_attr *init,
 279                        struct ib_udata *udata,
 280                        struct rxe_create_qp_resp __user *uresp)
 281 {
 282         struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 283         int wqe_size;
 284         int err;
 285
 286         qp->rq.max_wr = init->cap.max_recv_wr;
 287         qp->rq.max_sge = init->cap.max_recv_sge;
 288         wqe_size = sizeof(struct rxe_recv_wqe) +
 289                                 qp->rq.max_sge*sizeof(struct ib_sge);
 290
 291         qp->rq.queue = rxe_queue_init(rxe, &qp->rq.max_wr, wqe_size,
 292                                       QUEUE_TYPE_FROM_CLIENT);
 293         if (!qp->rq.queue) {
 294                 rxe_err_qp(qp, "Unable to allocate recv queue\n");
 295                 err = -ENOMEM;
 296                 goto err_out;
 297         }
 298
 299         /* prepare info for caller to mmap recv queue if user space qp */
 300         err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata,
 301                            qp->rq.queue->buf, qp->rq.queue->buf_size,
 302                            &qp->rq.queue->ip);
 303         if (err) {
 304                 rxe_err_qp(qp, "do_mmap_info failed, err = %d\n", err);
 305                 goto err_free;
 306         }
 307
 308         /* return actual capabilities to caller which may be larger
 309          * than requested
 310          */
 311         init->cap.max_recv_wr = qp->rq.max_wr;
 312
 313         return 0;
 314
 315 err_free:
 316         vfree(qp->rq.queue->buf);
 317         kfree(qp->rq.queue);
 318         qp->rq.queue = NULL;
 319 err_out:
 320         return err;
 321 }
 322
 323 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 324                             struct ib_qp_init_attr *init,
 325                             struct ib_udata *udata,
 326                             struct rxe_create_qp_resp __user *uresp)
 327 {
 328         int err;
 329
 330         /* if we don't finish qp create make sure queue is valid */
 331         skb_queue_head_init(&qp->resp_pkts);
 332
 333         if (!qp->srq) {
 334                 err = rxe_init_rq(qp, init, udata, uresp);
 335                 if (err)
 336                         return err;
 337         }
 338
 339         rxe_init_task(&qp->recv_task, qp, rxe_receiver);
 340
 341         qp->resp.opcode         = OPCODE_NONE;
 342         qp->resp.msn            = 0;
 343
 344         return 0;
 345 }
 346
 347 /* called by the create qp verb */
 348 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 349                      struct ib_qp_init_attr *init,
 350                      struct rxe_create_qp_resp __user *uresp,
 351                      struct ib_pd *ibpd,
 352                      struct ib_udata *udata)
 353 {
 354         int err;
 355         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 356         struct rxe_cq *scq = to_rcq(init->send_cq);
 357         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 358         unsigned long flags;
 359
 360         rxe_get(pd);
 361         rxe_get(rcq);
 362         rxe_get(scq);
 363         if (srq)
 364                 rxe_get(srq);
 365
 366         qp->pd = pd;
 367         qp->rcq = rcq;
 368         qp->scq = scq;
 369         qp->srq = srq;
 370
 371         atomic_inc(&rcq->num_wq);
 372         atomic_inc(&scq->num_wq);
 373
 374         rxe_qp_init_misc(rxe, qp, init);
 375
 376         err = rxe_qp_init_req(rxe, qp, init, udata, uresp);
 377         if (err)
 378                 goto err1;
 379
 380         err = rxe_qp_init_resp(rxe, qp, init, udata, uresp);
 381         if (err)
 382                 goto err2;
 383
 384         spin_lock_irqsave(&qp->state_lock, flags);
 385         qp->attr.qp_state = IB_QPS_RESET;
 386         qp->valid = 1;
 387         spin_unlock_irqrestore(&qp->state_lock, flags);
 388
 389         return 0;
 390
 391 err2:
 392         rxe_queue_cleanup(qp->sq.queue);
 393         qp->sq.queue = NULL;
 394 err1:
 395         atomic_dec(&rcq->num_wq);
 396         atomic_dec(&scq->num_wq);
 397
 398         qp->pd = NULL;
 399         qp->rcq = NULL;
 400         qp->scq = NULL;
 401         qp->srq = NULL;
 402
 403         if (srq)
 404                 rxe_put(srq);
 405         rxe_put(scq);
 406         rxe_put(rcq);
 407         rxe_put(pd);
 408
 409         return err;
 410 }
 411
 412 /* called by the query qp verb */
 413 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 414 {
 415         init->event_handler             = qp->ibqp.event_handler;
 416         init->qp_context                = qp->ibqp.qp_context;
 417         init->send_cq                   = qp->ibqp.send_cq;
 418         init->recv_cq                   = qp->ibqp.recv_cq;
 419         init->srq                       = qp->ibqp.srq;
 420
 421         init->cap.max_send_wr           = qp->sq.max_wr;
 422         init->cap.max_send_sge          = qp->sq.max_sge;
 423         init->cap.max_inline_data       = qp->sq.max_inline;
 424
 425         if (!qp->srq) {
 426                 init->cap.max_recv_wr           = qp->rq.max_wr;
 427                 init->cap.max_recv_sge          = qp->rq.max_sge;
 428         }
 429
 430         init->sq_sig_type               = qp->sq_sig_type;
 431
 432         init->qp_type                   = qp->ibqp.qp_type;
 433         init->port_num                  = 1;
 434
 435         return 0;
 436 }
 437
 438 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 439                     struct ib_qp_attr *attr, int mask)
 440 {
 441         if (mask & IB_QP_PORT) {
 442                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) {
 443                         rxe_dbg_qp(qp, "invalid port %d\n", attr->port_num);
 444                         goto err1;
 445                 }
 446         }
 447
 448         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 449                 goto err1;
 450
 451         if (mask & IB_QP_ACCESS_FLAGS) {
 452                 if (!(qp_type(qp) == IB_QPT_RC || qp_type(qp) == IB_QPT_UC))
 453                         goto err1;
 454                 if (attr->qp_access_flags & ~RXE_ACCESS_SUPPORTED_QP)
 455                         goto err1;
 456         }
 457
 458         if (mask & IB_QP_AV && rxe_av_chk_attr(qp, &attr->ah_attr))
 459                 goto err1;
 460
 461         if (mask & IB_QP_ALT_PATH) {
 462                 if (rxe_av_chk_attr(qp, &attr->alt_ah_attr))
 463                         goto err1;
 464                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num))  {
 465                         rxe_dbg_qp(qp, "invalid alt port %d\n", attr->alt_port_num);
 466                         goto err1;
 467                 }
 468                 if (attr->alt_timeout > 31) {
 469                         rxe_dbg_qp(qp, "invalid alt timeout %d > 31\n",
 470                                  attr->alt_timeout);
 471                         goto err1;
 472                 }
 473         }
 474
 475         if (mask & IB_QP_PATH_MTU) {
 476                 struct rxe_port *port = &rxe->port;
 477
 478                 enum ib_mtu max_mtu = port->attr.max_mtu;
 479                 enum ib_mtu mtu = attr->path_mtu;
 480
 481                 if (mtu > max_mtu) {
 482                         rxe_dbg_qp(qp, "invalid mtu (%d) > (%d)\n",
 483                                  ib_mtu_enum_to_int(mtu),
 484                                  ib_mtu_enum_to_int(max_mtu));
 485                         goto err1;
 486                 }
 487         }
 488
 489         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 490                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 491                         rxe_dbg_qp(qp, "invalid max_rd_atomic %d > %d\n",
 492                                  attr->max_rd_atomic,
 493                                  rxe->attr.max_qp_rd_atom);
 494                         goto err1;
 495                 }
 496         }
 497
 498         if (mask & IB_QP_TIMEOUT) {
 499                 if (attr->timeout > 31) {
 500                         rxe_dbg_qp(qp, "invalid timeout %d > 31\n",
 501                                         attr->timeout);
 502                         goto err1;
 503                 }
 504         }
 505
 506         return 0;
 507
 508 err1:
 509         return -EINVAL;
 510 }
 511
 512 /* move the qp to the reset state */
 513 static void rxe_qp_reset(struct rxe_qp *qp)
 514 {
 515         /* stop tasks from running */
 516         rxe_disable_task(&qp->recv_task);
 517         rxe_disable_task(&qp->send_task);
 518
 519         /* drain work and packet queuesc */
 520         rxe_sender(qp);
 521         rxe_receiver(qp);
 522
 523         if (qp->rq.queue)
 524                 rxe_queue_reset(qp->rq.queue);
 525         if (qp->sq.queue)
 526                 rxe_queue_reset(qp->sq.queue);
 527
 528         /* cleanup attributes */
 529         atomic_set(&qp->ssn, 0);
 530         qp->req.opcode = -1;
 531         qp->req.need_retry = 0;
 532         qp->req.wait_for_rnr_timer = 0;
 533         qp->req.noack_pkts = 0;
 534         qp->resp.msn = 0;
 535         qp->resp.opcode = -1;
 536         qp->resp.drop_msg = 0;
 537         qp->resp.goto_error = 0;
 538         qp->resp.sent_psn_nak = 0;
 539
 540         if (qp->resp.mr) {
 541                 rxe_put(qp->resp.mr);
 542                 qp->resp.mr = NULL;
 543         }
 544
 545         cleanup_rd_atomic_resources(qp);
 546
 547         /* reenable tasks */
 548         rxe_enable_task(&qp->recv_task);
 549         rxe_enable_task(&qp->send_task);
 550 }
 551
 552 /* move the qp to the error state */
 553 void rxe_qp_error(struct rxe_qp *qp)
 554 {
 555         unsigned long flags;
 556
 557         spin_lock_irqsave(&qp->state_lock, flags);
 558         qp->attr.qp_state = IB_QPS_ERR;
 559
 560         /* drain work and packet queues */
 561         rxe_sched_task(&qp->recv_task);
 562         rxe_sched_task(&qp->send_task);
 563         spin_unlock_irqrestore(&qp->state_lock, flags);
 564 }
 565
 566 static void rxe_qp_sqd(struct rxe_qp *qp, struct ib_qp_attr *attr,
 567                        int mask)
 568 {
 569         unsigned long flags;
 570
 571         spin_lock_irqsave(&qp->state_lock, flags);
 572         qp->attr.sq_draining = 1;
 573         rxe_sched_task(&qp->send_task);
 574         spin_unlock_irqrestore(&qp->state_lock, flags);
 575 }
 576
 577 /* caller should hold qp->state_lock */
 578 static int __qp_chk_state(struct rxe_qp *qp, struct ib_qp_attr *attr,
 579                             int mask)
 580 {
 581         enum ib_qp_state cur_state;
 582         enum ib_qp_state new_state;
 583
 584         cur_state = (mask & IB_QP_CUR_STATE) ?
 585                                 attr->cur_qp_state : qp->attr.qp_state;
 586         new_state = (mask & IB_QP_STATE) ?
 587                                 attr->qp_state : cur_state;
 588
 589         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask))
 590                 return -EINVAL;
 591
 592         if (mask & IB_QP_STATE && cur_state == IB_QPS_SQD) {
 593                 if (qp->attr.sq_draining && new_state != IB_QPS_ERR)
 594                         return -EINVAL;
 595         }
 596
 597         return 0;
 598 }
 599
 600 static const char *const qps2str[] = {
 601         [IB_QPS_RESET]  = "RESET",
 602         [IB_QPS_INIT]   = "INIT",
 603         [IB_QPS_RTR]    = "RTR",
 604         [IB_QPS_RTS]    = "RTS",
 605         [IB_QPS_SQD]    = "SQD",
 606         [IB_QPS_SQE]    = "SQE",
 607         [IB_QPS_ERR]    = "ERR",
 608 };
 609
 610 /* called by the modify qp verb */
 611 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 612                      struct ib_udata *udata)
 613 {
 614         int err;
 615
 616         if (mask & IB_QP_CUR_STATE)
 617                 qp->attr.cur_qp_state = attr->qp_state;
 618
 619         if (mask & IB_QP_STATE) {
 620                 unsigned long flags;
 621
 622                 spin_lock_irqsave(&qp->state_lock, flags);
 623                 err = __qp_chk_state(qp, attr, mask);
 624                 if (!err) {
 625                         qp->attr.qp_state = attr->qp_state;
 626                         rxe_dbg_qp(qp, "state -> %s\n",
 627                                         qps2str[attr->qp_state]);
 628                 }
 629                 spin_unlock_irqrestore(&qp->state_lock, flags);
 630
 631                 if (err)
 632                         return err;
 633
 634                 switch (attr->qp_state) {
 635                 case IB_QPS_RESET:
 636                         rxe_qp_reset(qp);
 637                         break;
 638                 case IB_QPS_SQD:
 639                         rxe_qp_sqd(qp, attr, mask);
 640                         break;
 641                 case IB_QPS_ERR:
 642                         rxe_qp_error(qp);
 643                         break;
 644                 default:
 645                         break;
 646                 }
 647         }
 648
 649         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 650                 int max_rd_atomic = attr->max_rd_atomic ?
 651                         roundup_pow_of_two(attr->max_rd_atomic) : 0;
 652
 653                 qp->attr.max_rd_atomic = max_rd_atomic;
 654                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 655         }
 656
 657         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 658                 int max_dest_rd_atomic = attr->max_dest_rd_atomic ?
 659                         roundup_pow_of_two(attr->max_dest_rd_atomic) : 0;
 660
 661                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 662
 663                 free_rd_atomic_resources(qp);
 664
 665                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 666                 if (err)
 667                         return err;
 668         }
 669
 670         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 671                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 672
 673         if (mask & IB_QP_ACCESS_FLAGS)
 674                 qp->attr.qp_access_flags = attr->qp_access_flags;
 675
 676         if (mask & IB_QP_PKEY_INDEX)
 677                 qp->attr.pkey_index = attr->pkey_index;
 678
 679         if (mask & IB_QP_PORT)
 680                 qp->attr.port_num = attr->port_num;
 681
 682         if (mask & IB_QP_QKEY)
 683                 qp->attr.qkey = attr->qkey;
 684
 685         if (mask & IB_QP_AV)
 686                 rxe_init_av(&attr->ah_attr, &qp->pri_av);
 687
 688         if (mask & IB_QP_ALT_PATH) {
 689                 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av);
 690                 qp->attr.alt_port_num = attr->alt_port_num;
 691                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 692                 qp->attr.alt_timeout = attr->alt_timeout;
 693         }
 694
 695         if (mask & IB_QP_PATH_MTU) {
 696                 qp->attr.path_mtu = attr->path_mtu;
 697                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 698         }
 699
 700         if (mask & IB_QP_TIMEOUT) {
 701                 qp->attr.timeout = attr->timeout;
 702                 if (attr->timeout == 0) {
 703                         qp->qp_timeout_jiffies = 0;
 704                 } else {
 705                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 706                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 707
 708                         qp->qp_timeout_jiffies = j ? j : 1;
 709                 }
 710         }
 711
 712         if (mask & IB_QP_RETRY_CNT) {
 713                 qp->attr.retry_cnt = attr->retry_cnt;
 714                 qp->comp.retry_cnt = attr->retry_cnt;
 715                 rxe_dbg_qp(qp, "set retry count = %d\n", attr->retry_cnt);
 716         }
 717
 718         if (mask & IB_QP_RNR_RETRY) {
 719                 qp->attr.rnr_retry = attr->rnr_retry;
 720                 qp->comp.rnr_retry = attr->rnr_retry;
 721                 rxe_dbg_qp(qp, "set rnr retry count = %d\n", attr->rnr_retry);
 722         }
 723
 724         if (mask & IB_QP_RQ_PSN) {
 725                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 726                 qp->resp.psn = qp->attr.rq_psn;
 727                 rxe_dbg_qp(qp, "set resp psn = 0x%x\n", qp->resp.psn);
 728         }
 729
 730         if (mask & IB_QP_MIN_RNR_TIMER) {
 731                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 732                 rxe_dbg_qp(qp, "set min rnr timer = 0x%x\n",
 733                          attr->min_rnr_timer);
 734         }
 735
 736         if (mask & IB_QP_SQ_PSN) {
 737                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 738                 qp->req.psn = qp->attr.sq_psn;
 739                 qp->comp.psn = qp->attr.sq_psn;
 740                 rxe_dbg_qp(qp, "set req psn = 0x%x\n", qp->req.psn);
 741         }
 742
 743         if (mask & IB_QP_PATH_MIG_STATE)
 744                 qp->attr.path_mig_state = attr->path_mig_state;
 745
 746         if (mask & IB_QP_DEST_QPN)
 747                 qp->attr.dest_qp_num = attr->dest_qp_num;
 748
 749         return 0;
 750 }
 751
 752 /* called by the query qp verb */
 753 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 754 {
 755         unsigned long flags;
 756
 757         *attr = qp->attr;
 758
 759         attr->rq_psn                            = qp->resp.psn;
 760         attr->sq_psn                            = qp->req.psn;
 761
 762         attr->cap.max_send_wr                   = qp->sq.max_wr;
 763         attr->cap.max_send_sge                  = qp->sq.max_sge;
 764         attr->cap.max_inline_data               = qp->sq.max_inline;
 765
 766         if (!qp->srq) {
 767                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 768                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 769         }
 770
 771         rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
 772         rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
 773
 774         /* Applications that get this state typically spin on it.
 775          * Yield the processor
 776          */
 777         spin_lock_irqsave(&qp->state_lock, flags);
 778         attr->cur_qp_state = qp_state(qp);
 779         if (qp->attr.sq_draining) {
 780                 spin_unlock_irqrestore(&qp->state_lock, flags);
 781                 cond_resched();
 782         } else {
 783                 spin_unlock_irqrestore(&qp->state_lock, flags);
 784         }
 785
 786         return 0;
 787 }
 788
 789 int rxe_qp_chk_destroy(struct rxe_qp *qp)
 790 {
 791         /* See IBA o10-2.2.3
 792          * An attempt to destroy a QP while attached to a mcast group
 793          * will fail immediately.
 794          */
 795         if (atomic_read(&qp->mcg_num)) {
 796                 rxe_dbg_qp(qp, "Attempt to destroy while attached to multicast group\n");
 797                 return -EBUSY;
 798         }
 799
 800         return 0;
 801 }
 802
 803 /* called when the last reference to the qp is dropped */
 804 static void rxe_qp_do_cleanup(struct work_struct *work)
 805 {
 806         struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
 807         unsigned long flags;
 808
 809         spin_lock_irqsave(&qp->state_lock, flags);
 810         qp->valid = 0;
 811         spin_unlock_irqrestore(&qp->state_lock, flags);
 812         qp->qp_timeout_jiffies = 0;
 813
 814         if (qp_type(qp) == IB_QPT_RC) {
 815                 del_timer_sync(&qp->retrans_timer);
 816                 del_timer_sync(&qp->rnr_nak_timer);
 817         }
 818
 819         if (qp->recv_task.func)
 820                 rxe_cleanup_task(&qp->recv_task);
 821
 822         if (qp->send_task.func)
 823                 rxe_cleanup_task(&qp->send_task);
 824
 825         /* flush out any receive wr's or pending requests */
 826         rxe_sender(qp);
 827         rxe_receiver(qp);
 828
 829         if (qp->sq.queue)
 830                 rxe_queue_cleanup(qp->sq.queue);
 831
 832         if (qp->srq)
 833                 rxe_put(qp->srq);
 834
 835         if (qp->rq.queue)
 836                 rxe_queue_cleanup(qp->rq.queue);
 837
 838         if (qp->scq) {
 839                 atomic_dec(&qp->scq->num_wq);
 840                 rxe_put(qp->scq);
 841         }
 842
 843         if (qp->rcq) {
 844                 atomic_dec(&qp->rcq->num_wq);
 845                 rxe_put(qp->rcq);
 846         }
 847
 848         if (qp->pd)
 849                 rxe_put(qp->pd);
 850
 851         if (qp->resp.mr)
 852                 rxe_put(qp->resp.mr);
 853
 854         free_rd_atomic_resources(qp);
 855
 856         if (qp->sk) {
 857                 if (qp_type(qp) == IB_QPT_RC)
 858                         sk_dst_reset(qp->sk->sk);
 859
 860                 kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 861                 sock_release(qp->sk);
 862         }
 863 }
 864
 865 /* called when the last reference to the qp is dropped */
 866 void rxe_qp_cleanup(struct rxe_pool_elem *elem)
 867 {
 868         struct rxe_qp *qp = container_of(elem, typeof(*qp), elem);
 869
 870         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 871 }