root/drivers/infiniband/sw/rxe/rxe_qp.c

DEFINITIONS

1. rxe_qp_chk_cap
2. rxe_qp_chk_init
3. alloc_rd_atomic_resources
4. free_rd_atomic_resources
5. free_rd_atomic_resource
6. cleanup_rd_atomic_resources
7. rxe_qp_init_misc
8. rxe_qp_init_req
9. rxe_qp_init_resp
10. rxe_qp_from_init
11. rxe_qp_to_init
12. rxe_qp_chk_attr
13. rxe_qp_reset
14. rxe_qp_drain
15. rxe_qp_error
16. rxe_qp_from_attr
17. rxe_qp_to_attr
18. rxe_qp_destroy
19. rxe_qp_do_cleanup
20. rxe_qp_cleanup

   1 /*
   2  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   3  * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *         Redistribution and use in source and binary forms, with or
  12  *         without modification, are permitted provided that the following
  13  *         conditions are met:
  14  *
  15  *              - Redistributions of source code must retain the above
  16  *                copyright notice, this list of conditions and the following
  17  *                disclaimer.
  18  *
  19  *              - Redistributions in binary form must reproduce the above
  20  *                copyright notice, this list of conditions and the following
  21  *                disclaimer in the documentation and/or other materials
  22  *                provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33 
  34 #include <linux/skbuff.h>
  35 #include <linux/delay.h>
  36 #include <linux/sched.h>
  37 #include <linux/vmalloc.h>
  38 #include <rdma/uverbs_ioctl.h>
  39 
  40 #include "rxe.h"
  41 #include "rxe_loc.h"
  42 #include "rxe_queue.h"
  43 #include "rxe_task.h"
  44 
  45 static int rxe_qp_chk_cap(struct rxe_dev *rxe, struct ib_qp_cap *cap,
  46                           int has_srq)
  47 {
  48         if (cap->max_send_wr > rxe->attr.max_qp_wr) {
  49                 pr_warn("invalid send wr = %d > %d\n",
  50                         cap->max_send_wr, rxe->attr.max_qp_wr);
  51                 goto err1;
  52         }
  53 
  54         if (cap->max_send_sge > rxe->attr.max_send_sge) {
  55                 pr_warn("invalid send sge = %d > %d\n",
  56                         cap->max_send_sge, rxe->attr.max_send_sge);
  57                 goto err1;
  58         }
  59 
  60         if (!has_srq) {
  61                 if (cap->max_recv_wr > rxe->attr.max_qp_wr) {
  62                         pr_warn("invalid recv wr = %d > %d\n",
  63                                 cap->max_recv_wr, rxe->attr.max_qp_wr);
  64                         goto err1;
  65                 }
  66 
  67                 if (cap->max_recv_sge > rxe->attr.max_recv_sge) {
  68                         pr_warn("invalid recv sge = %d > %d\n",
  69                                 cap->max_recv_sge, rxe->attr.max_recv_sge);
  70                         goto err1;
  71                 }
  72         }
  73 
  74         if (cap->max_inline_data > rxe->max_inline_data) {
  75                 pr_warn("invalid max inline data = %d > %d\n",
  76                         cap->max_inline_data, rxe->max_inline_data);
  77                 goto err1;
  78         }
  79 
  80         return 0;
  81 
  82 err1:
  83         return -EINVAL;
  84 }
  85 
  86 int rxe_qp_chk_init(struct rxe_dev *rxe, struct ib_qp_init_attr *init)
  87 {
  88         struct ib_qp_cap *cap = &init->cap;
  89         struct rxe_port *port;
  90         int port_num = init->port_num;
  91 
  92         if (!init->recv_cq || !init->send_cq) {
  93                 pr_warn("missing cq\n");
  94                 goto err1;
  95         }
  96 
  97         if (rxe_qp_chk_cap(rxe, cap, !!init->srq))
  98                 goto err1;
  99 
 100         if (init->qp_type == IB_QPT_SMI || init->qp_type == IB_QPT_GSI) {
 101                 if (!rdma_is_port_valid(&rxe->ib_dev, port_num)) {
 102                         pr_warn("invalid port = %d\n", port_num);
 103                         goto err1;
 104                 }
 105 
 106                 port = &rxe->port;
 107 
 108                 if (init->qp_type == IB_QPT_SMI && port->qp_smi_index) {
 109                         pr_warn("SMI QP exists for port %d\n", port_num);
 110                         goto err1;
 111                 }
 112 
 113                 if (init->qp_type == IB_QPT_GSI && port->qp_gsi_index) {
 114                         pr_warn("GSI QP exists for port %d\n", port_num);
 115                         goto err1;
 116                 }
 117         }
 118 
 119         return 0;
 120 
 121 err1:
 122         return -EINVAL;
 123 }
 124 
 125 static int alloc_rd_atomic_resources(struct rxe_qp *qp, unsigned int n)
 126 {
 127         qp->resp.res_head = 0;
 128         qp->resp.res_tail = 0;
 129         qp->resp.resources = kcalloc(n, sizeof(struct resp_res), GFP_KERNEL);
 130 
 131         if (!qp->resp.resources)
 132                 return -ENOMEM;
 133 
 134         return 0;
 135 }
 136 
 137 static void free_rd_atomic_resources(struct rxe_qp *qp)
 138 {
 139         if (qp->resp.resources) {
 140                 int i;
 141 
 142                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 143                         struct resp_res *res = &qp->resp.resources[i];
 144 
 145                         free_rd_atomic_resource(qp, res);
 146                 }
 147                 kfree(qp->resp.resources);
 148                 qp->resp.resources = NULL;
 149         }
 150 }
 151 
 152 void free_rd_atomic_resource(struct rxe_qp *qp, struct resp_res *res)
 153 {
 154         if (res->type == RXE_ATOMIC_MASK) {
 155                 rxe_drop_ref(qp);
 156                 kfree_skb(res->atomic.skb);
 157         } else if (res->type == RXE_READ_MASK) {
 158                 if (res->read.mr)
 159                         rxe_drop_ref(res->read.mr);
 160         }
 161         res->type = 0;
 162 }
 163 
 164 static void cleanup_rd_atomic_resources(struct rxe_qp *qp)
 165 {
 166         int i;
 167         struct resp_res *res;
 168 
 169         if (qp->resp.resources) {
 170                 for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) {
 171                         res = &qp->resp.resources[i];
 172                         free_rd_atomic_resource(qp, res);
 173                 }
 174         }
 175 }
 176 
 177 static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
 178                              struct ib_qp_init_attr *init)
 179 {
 180         struct rxe_port *port;
 181         u32 qpn;
 182 
 183         qp->sq_sig_type         = init->sq_sig_type;
 184         qp->attr.path_mtu       = 1;
 185         qp->mtu                 = ib_mtu_enum_to_int(qp->attr.path_mtu);
 186 
 187         qpn                     = qp->pelem.index;
 188         port                    = &rxe->port;
 189 
 190         switch (init->qp_type) {
 191         case IB_QPT_SMI:
 192                 qp->ibqp.qp_num         = 0;
 193                 port->qp_smi_index      = qpn;
 194                 qp->attr.port_num       = init->port_num;
 195                 break;
 196 
 197         case IB_QPT_GSI:
 198                 qp->ibqp.qp_num         = 1;
 199                 port->qp_gsi_index      = qpn;
 200                 qp->attr.port_num       = init->port_num;
 201                 break;
 202 
 203         default:
 204                 qp->ibqp.qp_num         = qpn;
 205                 break;
 206         }
 207 
 208         INIT_LIST_HEAD(&qp->grp_list);
 209 
 210         skb_queue_head_init(&qp->send_pkts);
 211 
 212         spin_lock_init(&qp->grp_lock);
 213         spin_lock_init(&qp->state_lock);
 214 
 215         atomic_set(&qp->ssn, 0);
 216         atomic_set(&qp->skb_out, 0);
 217 }
 218 
 219 static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
 220                            struct ib_qp_init_attr *init, struct ib_udata *udata,
 221                            struct rxe_create_qp_resp __user *uresp)
 222 {
 223         int err;
 224         int wqe_size;
 225 
 226         err = sock_create_kern(&init_net, AF_INET, SOCK_DGRAM, 0, &qp->sk);
 227         if (err < 0)
 228                 return err;
 229         qp->sk->sk->sk_user_data = qp;
 230 
 231         /* pick a source UDP port number for this QP based on
 232          * the source QPN. this spreads traffic for different QPs
 233          * across different NIC RX queues (while using a single
 234          * flow for a given QP to maintain packet order).
 235          * the port number must be in the Dynamic Ports range
 236          * (0xc000 - 0xffff).
 237          */
 238         qp->src_port = RXE_ROCE_V2_SPORT +
 239                 (hash_32_generic(qp_num(qp), 14) & 0x3fff);
 240 
 241         qp->sq.max_wr           = init->cap.max_send_wr;
 242         qp->sq.max_sge          = init->cap.max_send_sge;
 243         qp->sq.max_inline       = init->cap.max_inline_data;
 244 
 245         wqe_size = max_t(int, sizeof(struct rxe_send_wqe) +
 246                          qp->sq.max_sge * sizeof(struct ib_sge),
 247                          sizeof(struct rxe_send_wqe) +
 248                          qp->sq.max_inline);
 249 
 250         qp->sq.queue = rxe_queue_init(rxe,
 251                                       &qp->sq.max_wr,
 252                                       wqe_size);
 253         if (!qp->sq.queue)
 254                 return -ENOMEM;
 255 
 256         err = do_mmap_info(rxe, uresp ? &uresp->sq_mi : NULL, udata,
 257                            qp->sq.queue->buf, qp->sq.queue->buf_size,
 258                            &qp->sq.queue->ip);
 259 
 260         if (err) {
 261                 vfree(qp->sq.queue->buf);
 262                 kfree(qp->sq.queue);
 263                 return err;
 264         }
 265 
 266         qp->req.wqe_index       = producer_index(qp->sq.queue);
 267         qp->req.state           = QP_STATE_RESET;
 268         qp->req.opcode          = -1;
 269         qp->comp.opcode         = -1;
 270 
 271         spin_lock_init(&qp->sq.sq_lock);
 272         skb_queue_head_init(&qp->req_pkts);
 273 
 274         rxe_init_task(rxe, &qp->req.task, qp,
 275                       rxe_requester, "req");
 276         rxe_init_task(rxe, &qp->comp.task, qp,
 277                       rxe_completer, "comp");
 278 
 279         qp->qp_timeout_jiffies = 0; /* Can't be set for UD/UC in modify_qp */
 280         if (init->qp_type == IB_QPT_RC) {
 281                 timer_setup(&qp->rnr_nak_timer, rnr_nak_timer, 0);
 282                 timer_setup(&qp->retrans_timer, retransmit_timer, 0);
 283         }
 284         return 0;
 285 }
 286 
 287 static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
 288                             struct ib_qp_init_attr *init,
 289                             struct ib_udata *udata,
 290                             struct rxe_create_qp_resp __user *uresp)
 291 {
 292         int err;
 293         int wqe_size;
 294 
 295         if (!qp->srq) {
 296                 qp->rq.max_wr           = init->cap.max_recv_wr;
 297                 qp->rq.max_sge          = init->cap.max_recv_sge;
 298 
 299                 wqe_size = rcv_wqe_size(qp->rq.max_sge);
 300 
 301                 pr_debug("qp#%d max_wr = %d, max_sge = %d, wqe_size = %d\n",
 302                          qp_num(qp), qp->rq.max_wr, qp->rq.max_sge, wqe_size);
 303 
 304                 qp->rq.queue = rxe_queue_init(rxe,
 305                                               &qp->rq.max_wr,
 306                                               wqe_size);
 307                 if (!qp->rq.queue)
 308                         return -ENOMEM;
 309 
 310                 err = do_mmap_info(rxe, uresp ? &uresp->rq_mi : NULL, udata,
 311                                    qp->rq.queue->buf, qp->rq.queue->buf_size,
 312                                    &qp->rq.queue->ip);
 313                 if (err) {
 314                         vfree(qp->rq.queue->buf);
 315                         kfree(qp->rq.queue);
 316                         return err;
 317                 }
 318         }
 319 
 320         spin_lock_init(&qp->rq.producer_lock);
 321         spin_lock_init(&qp->rq.consumer_lock);
 322 
 323         skb_queue_head_init(&qp->resp_pkts);
 324 
 325         rxe_init_task(rxe, &qp->resp.task, qp,
 326                       rxe_responder, "resp");
 327 
 328         qp->resp.opcode         = OPCODE_NONE;
 329         qp->resp.msn            = 0;
 330         qp->resp.state          = QP_STATE_RESET;
 331 
 332         return 0;
 333 }
 334 
 335 /* called by the create qp verb */
 336 int rxe_qp_from_init(struct rxe_dev *rxe, struct rxe_qp *qp, struct rxe_pd *pd,
 337                      struct ib_qp_init_attr *init,
 338                      struct rxe_create_qp_resp __user *uresp,
 339                      struct ib_pd *ibpd,
 340                      struct ib_udata *udata)
 341 {
 342         int err;
 343         struct rxe_cq *rcq = to_rcq(init->recv_cq);
 344         struct rxe_cq *scq = to_rcq(init->send_cq);
 345         struct rxe_srq *srq = init->srq ? to_rsrq(init->srq) : NULL;
 346 
 347         rxe_add_ref(pd);
 348         rxe_add_ref(rcq);
 349         rxe_add_ref(scq);
 350         if (srq)
 351                 rxe_add_ref(srq);
 352 
 353         qp->pd                  = pd;
 354         qp->rcq                 = rcq;
 355         qp->scq                 = scq;
 356         qp->srq                 = srq;
 357 
 358         rxe_qp_init_misc(rxe, qp, init);
 359 
 360         err = rxe_qp_init_req(rxe, qp, init, udata, uresp);
 361         if (err)
 362                 goto err1;
 363 
 364         err = rxe_qp_init_resp(rxe, qp, init, udata, uresp);
 365         if (err)
 366                 goto err2;
 367 
 368         qp->attr.qp_state = IB_QPS_RESET;
 369         qp->valid = 1;
 370 
 371         return 0;
 372 
 373 err2:
 374         rxe_queue_cleanup(qp->sq.queue);
 375 err1:
 376         if (srq)
 377                 rxe_drop_ref(srq);
 378         rxe_drop_ref(scq);
 379         rxe_drop_ref(rcq);
 380         rxe_drop_ref(pd);
 381 
 382         return err;
 383 }
 384 
 385 /* called by the query qp verb */
 386 int rxe_qp_to_init(struct rxe_qp *qp, struct ib_qp_init_attr *init)
 387 {
 388         init->event_handler             = qp->ibqp.event_handler;
 389         init->qp_context                = qp->ibqp.qp_context;
 390         init->send_cq                   = qp->ibqp.send_cq;
 391         init->recv_cq                   = qp->ibqp.recv_cq;
 392         init->srq                       = qp->ibqp.srq;
 393 
 394         init->cap.max_send_wr           = qp->sq.max_wr;
 395         init->cap.max_send_sge          = qp->sq.max_sge;
 396         init->cap.max_inline_data       = qp->sq.max_inline;
 397 
 398         if (!qp->srq) {
 399                 init->cap.max_recv_wr           = qp->rq.max_wr;
 400                 init->cap.max_recv_sge          = qp->rq.max_sge;
 401         }
 402 
 403         init->sq_sig_type               = qp->sq_sig_type;
 404 
 405         init->qp_type                   = qp->ibqp.qp_type;
 406         init->port_num                  = 1;
 407 
 408         return 0;
 409 }
 410 
 411 /* called by the modify qp verb, this routine checks all the parameters before
 412  * making any changes
 413  */
 414 int rxe_qp_chk_attr(struct rxe_dev *rxe, struct rxe_qp *qp,
 415                     struct ib_qp_attr *attr, int mask)
 416 {
 417         enum ib_qp_state cur_state = (mask & IB_QP_CUR_STATE) ?
 418                                         attr->cur_qp_state : qp->attr.qp_state;
 419         enum ib_qp_state new_state = (mask & IB_QP_STATE) ?
 420                                         attr->qp_state : cur_state;
 421 
 422         if (!ib_modify_qp_is_ok(cur_state, new_state, qp_type(qp), mask)) {
 423                 pr_warn("invalid mask or state for qp\n");
 424                 goto err1;
 425         }
 426 
 427         if (mask & IB_QP_STATE) {
 428                 if (cur_state == IB_QPS_SQD) {
 429                         if (qp->req.state == QP_STATE_DRAIN &&
 430                             new_state != IB_QPS_ERR)
 431                                 goto err1;
 432                 }
 433         }
 434 
 435         if (mask & IB_QP_PORT) {
 436                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->port_num)) {
 437                         pr_warn("invalid port %d\n", attr->port_num);
 438                         goto err1;
 439                 }
 440         }
 441 
 442         if (mask & IB_QP_CAP && rxe_qp_chk_cap(rxe, &attr->cap, !!qp->srq))
 443                 goto err1;
 444 
 445         if (mask & IB_QP_AV && rxe_av_chk_attr(rxe, &attr->ah_attr))
 446                 goto err1;
 447 
 448         if (mask & IB_QP_ALT_PATH) {
 449                 if (rxe_av_chk_attr(rxe, &attr->alt_ah_attr))
 450                         goto err1;
 451                 if (!rdma_is_port_valid(&rxe->ib_dev, attr->alt_port_num))  {
 452                         pr_warn("invalid alt port %d\n", attr->alt_port_num);
 453                         goto err1;
 454                 }
 455                 if (attr->alt_timeout > 31) {
 456                         pr_warn("invalid QP alt timeout %d > 31\n",
 457                                 attr->alt_timeout);
 458                         goto err1;
 459                 }
 460         }
 461 
 462         if (mask & IB_QP_PATH_MTU) {
 463                 struct rxe_port *port = &rxe->port;
 464 
 465                 enum ib_mtu max_mtu = port->attr.max_mtu;
 466                 enum ib_mtu mtu = attr->path_mtu;
 467 
 468                 if (mtu > max_mtu) {
 469                         pr_debug("invalid mtu (%d) > (%d)\n",
 470                                  ib_mtu_enum_to_int(mtu),
 471                                  ib_mtu_enum_to_int(max_mtu));
 472                         goto err1;
 473                 }
 474         }
 475 
 476         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 477                 if (attr->max_rd_atomic > rxe->attr.max_qp_rd_atom) {
 478                         pr_warn("invalid max_rd_atomic %d > %d\n",
 479                                 attr->max_rd_atomic,
 480                                 rxe->attr.max_qp_rd_atom);
 481                         goto err1;
 482                 }
 483         }
 484 
 485         if (mask & IB_QP_TIMEOUT) {
 486                 if (attr->timeout > 31) {
 487                         pr_warn("invalid QP timeout %d > 31\n",
 488                                 attr->timeout);
 489                         goto err1;
 490                 }
 491         }
 492 
 493         return 0;
 494 
 495 err1:
 496         return -EINVAL;
 497 }
 498 
 499 /* move the qp to the reset state */
 500 static void rxe_qp_reset(struct rxe_qp *qp)
 501 {
 502         /* stop tasks from running */
 503         rxe_disable_task(&qp->resp.task);
 504 
 505         /* stop request/comp */
 506         if (qp->sq.queue) {
 507                 if (qp_type(qp) == IB_QPT_RC)
 508                         rxe_disable_task(&qp->comp.task);
 509                 rxe_disable_task(&qp->req.task);
 510         }
 511 
 512         /* move qp to the reset state */
 513         qp->req.state = QP_STATE_RESET;
 514         qp->resp.state = QP_STATE_RESET;
 515 
 516         /* let state machines reset themselves drain work and packet queues
 517          * etc.
 518          */
 519         __rxe_do_task(&qp->resp.task);
 520 
 521         if (qp->sq.queue) {
 522                 __rxe_do_task(&qp->comp.task);
 523                 __rxe_do_task(&qp->req.task);
 524                 rxe_queue_reset(qp->sq.queue);
 525         }
 526 
 527         /* cleanup attributes */
 528         atomic_set(&qp->ssn, 0);
 529         qp->req.opcode = -1;
 530         qp->req.need_retry = 0;
 531         qp->req.noack_pkts = 0;
 532         qp->resp.msn = 0;
 533         qp->resp.opcode = -1;
 534         qp->resp.drop_msg = 0;
 535         qp->resp.goto_error = 0;
 536         qp->resp.sent_psn_nak = 0;
 537 
 538         if (qp->resp.mr) {
 539                 rxe_drop_ref(qp->resp.mr);
 540                 qp->resp.mr = NULL;
 541         }
 542 
 543         cleanup_rd_atomic_resources(qp);
 544 
 545         /* reenable tasks */
 546         rxe_enable_task(&qp->resp.task);
 547 
 548         if (qp->sq.queue) {
 549                 if (qp_type(qp) == IB_QPT_RC)
 550                         rxe_enable_task(&qp->comp.task);
 551 
 552                 rxe_enable_task(&qp->req.task);
 553         }
 554 }
 555 
 556 /* drain the send queue */
 557 static void rxe_qp_drain(struct rxe_qp *qp)
 558 {
 559         if (qp->sq.queue) {
 560                 if (qp->req.state != QP_STATE_DRAINED) {
 561                         qp->req.state = QP_STATE_DRAIN;
 562                         if (qp_type(qp) == IB_QPT_RC)
 563                                 rxe_run_task(&qp->comp.task, 1);
 564                         else
 565                                 __rxe_do_task(&qp->comp.task);
 566                         rxe_run_task(&qp->req.task, 1);
 567                 }
 568         }
 569 }
 570 
 571 /* move the qp to the error state */
 572 void rxe_qp_error(struct rxe_qp *qp)
 573 {
 574         qp->req.state = QP_STATE_ERROR;
 575         qp->resp.state = QP_STATE_ERROR;
 576         qp->attr.qp_state = IB_QPS_ERR;
 577 
 578         /* drain work and packet queues */
 579         rxe_run_task(&qp->resp.task, 1);
 580 
 581         if (qp_type(qp) == IB_QPT_RC)
 582                 rxe_run_task(&qp->comp.task, 1);
 583         else
 584                 __rxe_do_task(&qp->comp.task);
 585         rxe_run_task(&qp->req.task, 1);
 586 }
 587 
 588 /* called by the modify qp verb */
 589 int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 590                      struct ib_udata *udata)
 591 {
 592         int err;
 593 
 594         if (mask & IB_QP_MAX_QP_RD_ATOMIC) {
 595                 int max_rd_atomic = __roundup_pow_of_two(attr->max_rd_atomic);
 596 
 597                 qp->attr.max_rd_atomic = max_rd_atomic;
 598                 atomic_set(&qp->req.rd_atomic, max_rd_atomic);
 599         }
 600 
 601         if (mask & IB_QP_MAX_DEST_RD_ATOMIC) {
 602                 int max_dest_rd_atomic =
 603                         __roundup_pow_of_two(attr->max_dest_rd_atomic);
 604 
 605                 qp->attr.max_dest_rd_atomic = max_dest_rd_atomic;
 606 
 607                 free_rd_atomic_resources(qp);
 608 
 609                 err = alloc_rd_atomic_resources(qp, max_dest_rd_atomic);
 610                 if (err)
 611                         return err;
 612         }
 613 
 614         if (mask & IB_QP_CUR_STATE)
 615                 qp->attr.cur_qp_state = attr->qp_state;
 616 
 617         if (mask & IB_QP_EN_SQD_ASYNC_NOTIFY)
 618                 qp->attr.en_sqd_async_notify = attr->en_sqd_async_notify;
 619 
 620         if (mask & IB_QP_ACCESS_FLAGS)
 621                 qp->attr.qp_access_flags = attr->qp_access_flags;
 622 
 623         if (mask & IB_QP_PKEY_INDEX)
 624                 qp->attr.pkey_index = attr->pkey_index;
 625 
 626         if (mask & IB_QP_PORT)
 627                 qp->attr.port_num = attr->port_num;
 628 
 629         if (mask & IB_QP_QKEY)
 630                 qp->attr.qkey = attr->qkey;
 631 
 632         if (mask & IB_QP_AV) {
 633                 rxe_init_av(&attr->ah_attr, &qp->pri_av);
 634         }
 635 
 636         if (mask & IB_QP_ALT_PATH) {
 637                 rxe_init_av(&attr->alt_ah_attr, &qp->alt_av);
 638                 qp->attr.alt_port_num = attr->alt_port_num;
 639                 qp->attr.alt_pkey_index = attr->alt_pkey_index;
 640                 qp->attr.alt_timeout = attr->alt_timeout;
 641         }
 642 
 643         if (mask & IB_QP_PATH_MTU) {
 644                 qp->attr.path_mtu = attr->path_mtu;
 645                 qp->mtu = ib_mtu_enum_to_int(attr->path_mtu);
 646         }
 647 
 648         if (mask & IB_QP_TIMEOUT) {
 649                 qp->attr.timeout = attr->timeout;
 650                 if (attr->timeout == 0) {
 651                         qp->qp_timeout_jiffies = 0;
 652                 } else {
 653                         /* According to the spec, timeout = 4.096 * 2 ^ attr->timeout [us] */
 654                         int j = nsecs_to_jiffies(4096ULL << attr->timeout);
 655 
 656                         qp->qp_timeout_jiffies = j ? j : 1;
 657                 }
 658         }
 659 
 660         if (mask & IB_QP_RETRY_CNT) {
 661                 qp->attr.retry_cnt = attr->retry_cnt;
 662                 qp->comp.retry_cnt = attr->retry_cnt;
 663                 pr_debug("qp#%d set retry count = %d\n", qp_num(qp),
 664                          attr->retry_cnt);
 665         }
 666 
 667         if (mask & IB_QP_RNR_RETRY) {
 668                 qp->attr.rnr_retry = attr->rnr_retry;
 669                 qp->comp.rnr_retry = attr->rnr_retry;
 670                 pr_debug("qp#%d set rnr retry count = %d\n", qp_num(qp),
 671                          attr->rnr_retry);
 672         }
 673 
 674         if (mask & IB_QP_RQ_PSN) {
 675                 qp->attr.rq_psn = (attr->rq_psn & BTH_PSN_MASK);
 676                 qp->resp.psn = qp->attr.rq_psn;
 677                 pr_debug("qp#%d set resp psn = 0x%x\n", qp_num(qp),
 678                          qp->resp.psn);
 679         }
 680 
 681         if (mask & IB_QP_MIN_RNR_TIMER) {
 682                 qp->attr.min_rnr_timer = attr->min_rnr_timer;
 683                 pr_debug("qp#%d set min rnr timer = 0x%x\n", qp_num(qp),
 684                          attr->min_rnr_timer);
 685         }
 686 
 687         if (mask & IB_QP_SQ_PSN) {
 688                 qp->attr.sq_psn = (attr->sq_psn & BTH_PSN_MASK);
 689                 qp->req.psn = qp->attr.sq_psn;
 690                 qp->comp.psn = qp->attr.sq_psn;
 691                 pr_debug("qp#%d set req psn = 0x%x\n", qp_num(qp), qp->req.psn);
 692         }
 693 
 694         if (mask & IB_QP_PATH_MIG_STATE)
 695                 qp->attr.path_mig_state = attr->path_mig_state;
 696 
 697         if (mask & IB_QP_DEST_QPN)
 698                 qp->attr.dest_qp_num = attr->dest_qp_num;
 699 
 700         if (mask & IB_QP_STATE) {
 701                 qp->attr.qp_state = attr->qp_state;
 702 
 703                 switch (attr->qp_state) {
 704                 case IB_QPS_RESET:
 705                         pr_debug("qp#%d state -> RESET\n", qp_num(qp));
 706                         rxe_qp_reset(qp);
 707                         break;
 708 
 709                 case IB_QPS_INIT:
 710                         pr_debug("qp#%d state -> INIT\n", qp_num(qp));
 711                         qp->req.state = QP_STATE_INIT;
 712                         qp->resp.state = QP_STATE_INIT;
 713                         break;
 714 
 715                 case IB_QPS_RTR:
 716                         pr_debug("qp#%d state -> RTR\n", qp_num(qp));
 717                         qp->resp.state = QP_STATE_READY;
 718                         break;
 719 
 720                 case IB_QPS_RTS:
 721                         pr_debug("qp#%d state -> RTS\n", qp_num(qp));
 722                         qp->req.state = QP_STATE_READY;
 723                         break;
 724 
 725                 case IB_QPS_SQD:
 726                         pr_debug("qp#%d state -> SQD\n", qp_num(qp));
 727                         rxe_qp_drain(qp);
 728                         break;
 729 
 730                 case IB_QPS_SQE:
 731                         pr_warn("qp#%d state -> SQE !!?\n", qp_num(qp));
 732                         /* Not possible from modify_qp. */
 733                         break;
 734 
 735                 case IB_QPS_ERR:
 736                         pr_debug("qp#%d state -> ERR\n", qp_num(qp));
 737                         rxe_qp_error(qp);
 738                         break;
 739                 }
 740         }
 741 
 742         return 0;
 743 }
 744 
 745 /* called by the query qp verb */
 746 int rxe_qp_to_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask)
 747 {
 748         *attr = qp->attr;
 749 
 750         attr->rq_psn                            = qp->resp.psn;
 751         attr->sq_psn                            = qp->req.psn;
 752 
 753         attr->cap.max_send_wr                   = qp->sq.max_wr;
 754         attr->cap.max_send_sge                  = qp->sq.max_sge;
 755         attr->cap.max_inline_data               = qp->sq.max_inline;
 756 
 757         if (!qp->srq) {
 758                 attr->cap.max_recv_wr           = qp->rq.max_wr;
 759                 attr->cap.max_recv_sge          = qp->rq.max_sge;
 760         }
 761 
 762         rxe_av_to_attr(&qp->pri_av, &attr->ah_attr);
 763         rxe_av_to_attr(&qp->alt_av, &attr->alt_ah_attr);
 764 
 765         if (qp->req.state == QP_STATE_DRAIN) {
 766                 attr->sq_draining = 1;
 767                 /* applications that get this state
 768                  * typically spin on it. yield the
 769                  * processor
 770                  */
 771                 cond_resched();
 772         } else {
 773                 attr->sq_draining = 0;
 774         }
 775 
 776         pr_debug("attr->sq_draining = %d\n", attr->sq_draining);
 777 
 778         return 0;
 779 }
 780 
 781 /* called by the destroy qp verb */
 782 void rxe_qp_destroy(struct rxe_qp *qp)
 783 {
 784         qp->valid = 0;
 785         qp->qp_timeout_jiffies = 0;
 786         rxe_cleanup_task(&qp->resp.task);
 787 
 788         if (qp_type(qp) == IB_QPT_RC) {
 789                 del_timer_sync(&qp->retrans_timer);
 790                 del_timer_sync(&qp->rnr_nak_timer);
 791         }
 792 
 793         rxe_cleanup_task(&qp->req.task);
 794         rxe_cleanup_task(&qp->comp.task);
 795 
 796         /* flush out any receive wr's or pending requests */
 797         __rxe_do_task(&qp->req.task);
 798         if (qp->sq.queue) {
 799                 __rxe_do_task(&qp->comp.task);
 800                 __rxe_do_task(&qp->req.task);
 801         }
 802 }
 803 
 804 /* called when the last reference to the qp is dropped */
 805 static void rxe_qp_do_cleanup(struct work_struct *work)
 806 {
 807         struct rxe_qp *qp = container_of(work, typeof(*qp), cleanup_work.work);
 808 
 809         rxe_drop_all_mcast_groups(qp);
 810 
 811         if (qp->sq.queue)
 812                 rxe_queue_cleanup(qp->sq.queue);
 813 
 814         if (qp->srq)
 815                 rxe_drop_ref(qp->srq);
 816 
 817         if (qp->rq.queue)
 818                 rxe_queue_cleanup(qp->rq.queue);
 819 
 820         if (qp->scq)
 821                 rxe_drop_ref(qp->scq);
 822         if (qp->rcq)
 823                 rxe_drop_ref(qp->rcq);
 824         if (qp->pd)
 825                 rxe_drop_ref(qp->pd);
 826 
 827         if (qp->resp.mr) {
 828                 rxe_drop_ref(qp->resp.mr);
 829                 qp->resp.mr = NULL;
 830         }
 831 
 832         if (qp_type(qp) == IB_QPT_RC)
 833                 sk_dst_reset(qp->sk->sk);
 834 
 835         free_rd_atomic_resources(qp);
 836 
 837         kernel_sock_shutdown(qp->sk, SHUT_RDWR);
 838         sock_release(qp->sk);
 839 }
 840 
 841 /* called when the last reference to the qp is dropped */
 842 void rxe_qp_cleanup(struct rxe_pool_entry *arg)
 843 {
 844         struct rxe_qp *qp = container_of(arg, typeof(*qp), pelem);
 845 
 846         execute_in_process_context(rxe_qp_do_cleanup, &qp->cleanup_work);
 847 }