drivers/infiniband/hw/ehca/ehca_qp.c

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  QP functions
   5  *
   6  *  Authors: Waleri Fomin <fomin@de.ibm.com>
   7  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
   8  *           Reinhard Ernst <rernst@de.ibm.com>
   9  *           Heiko J Schick <schickhj@de.ibm.com>
  10  *
  11  *  Copyright (c) 2005 IBM Corporation
  12  *
  13  *  All rights reserved.
  14  *
  15  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  16  *  BSD.
  17  *
  18  * OpenIB BSD License
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions are met:
  22  *
  23  * Redistributions of source code must retain the above copyright notice, this
  24  * list of conditions and the following disclaimer.
  25  *
  26  * Redistributions in binary form must reproduce the above copyright notice,
  27  * this list of conditions and the following disclaimer in the documentation
  28  * and/or other materials
  29  * provided with the distribution.
  30  *
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  32  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  33  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  34  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  35  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  36  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  37  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  38  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  39  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  40  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGE.
  42  */
  43
  44
  45 #include <asm/current.h>
  46
  47 #include "ehca_classes.h"
  48 #include "ehca_tools.h"
  49 #include "ehca_qes.h"
  50 #include "ehca_iverbs.h"
  51 #include "hcp_if.h"
  52 #include "hipz_fns.h"
  53
  54 static struct kmem_cache *qp_cache;
  55
  56 /*
  57  * attributes not supported by query qp
  58  */
  59 #define QP_ATTR_QUERY_NOT_SUPPORTED (IB_QP_MAX_DEST_RD_ATOMIC | \
  60                                      IB_QP_MAX_QP_RD_ATOMIC   | \
  61                                      IB_QP_ACCESS_FLAGS       | \
  62                                      IB_QP_EN_SQD_ASYNC_NOTIFY)
  63
  64 /*
  65  * ehca (internal) qp state values
  66  */
  67 enum ehca_qp_state {
  68         EHCA_QPS_RESET = 1,
  69         EHCA_QPS_INIT = 2,
  70         EHCA_QPS_RTR = 3,
  71         EHCA_QPS_RTS = 5,
  72         EHCA_QPS_SQD = 6,
  73         EHCA_QPS_SQE = 8,
  74         EHCA_QPS_ERR = 128
  75 };
  76
  77 /*
  78  * qp state transitions as defined by IB Arch Rel 1.1 page 431
  79  */
  80 enum ib_qp_statetrans {
  81         IB_QPST_ANY2RESET,
  82         IB_QPST_ANY2ERR,
  83         IB_QPST_RESET2INIT,
  84         IB_QPST_INIT2RTR,
  85         IB_QPST_INIT2INIT,
  86         IB_QPST_RTR2RTS,
  87         IB_QPST_RTS2SQD,
  88         IB_QPST_RTS2RTS,
  89         IB_QPST_SQD2RTS,
  90         IB_QPST_SQE2RTS,
  91         IB_QPST_SQD2SQD,
  92         IB_QPST_MAX     /* nr of transitions, this must be last!!! */
  93 };
  94
  95 /*
  96  * ib2ehca_qp_state maps IB to ehca qp_state
  97  * returns ehca qp state corresponding to given ib qp state
  98  */
  99 static inline enum ehca_qp_state ib2ehca_qp_state(enum ib_qp_state ib_qp_state)
 100 {
 101         switch (ib_qp_state) {
 102         case IB_QPS_RESET:
 103                 return EHCA_QPS_RESET;
 104         case IB_QPS_INIT:
 105                 return EHCA_QPS_INIT;
 106         case IB_QPS_RTR:
 107                 return EHCA_QPS_RTR;
 108         case IB_QPS_RTS:
 109                 return EHCA_QPS_RTS;
 110         case IB_QPS_SQD:
 111                 return EHCA_QPS_SQD;
 112         case IB_QPS_SQE:
 113                 return EHCA_QPS_SQE;
 114         case IB_QPS_ERR:
 115                 return EHCA_QPS_ERR;
 116         default:
 117                 ehca_gen_err("invalid ib_qp_state=%x", ib_qp_state);
 118                 return -EINVAL;
 119         }
 120 }
 121
 122 /*
 123  * ehca2ib_qp_state maps ehca to IB qp_state
 124  * returns ib qp state corresponding to given ehca qp state
 125  */
 126 static inline enum ib_qp_state ehca2ib_qp_state(enum ehca_qp_state
 127                                                 ehca_qp_state)
 128 {
 129         switch (ehca_qp_state) {
 130         case EHCA_QPS_RESET:
 131                 return IB_QPS_RESET;
 132         case EHCA_QPS_INIT:
 133                 return IB_QPS_INIT;
 134         case EHCA_QPS_RTR:
 135                 return IB_QPS_RTR;
 136         case EHCA_QPS_RTS:
 137                 return IB_QPS_RTS;
 138         case EHCA_QPS_SQD:
 139                 return IB_QPS_SQD;
 140         case EHCA_QPS_SQE:
 141                 return IB_QPS_SQE;
 142         case EHCA_QPS_ERR:
 143                 return IB_QPS_ERR;
 144         default:
 145                 ehca_gen_err("invalid ehca_qp_state=%x", ehca_qp_state);
 146                 return -EINVAL;
 147         }
 148 }
 149
 150 /*
 151  * ehca_qp_type used as index for req_attr and opt_attr of
 152  * struct ehca_modqp_statetrans
 153  */
 154 enum ehca_qp_type {
 155         QPT_RC = 0,
 156         QPT_UC = 1,
 157         QPT_UD = 2,
 158         QPT_SQP = 3,
 159         QPT_MAX
 160 };
 161
 162 /*
 163  * ib2ehcaqptype maps Ib to ehca qp_type
 164  * returns ehca qp type corresponding to ib qp type
 165  */
 166 static inline enum ehca_qp_type ib2ehcaqptype(enum ib_qp_type ibqptype)
 167 {
 168         switch (ibqptype) {
 169         case IB_QPT_SMI:
 170         case IB_QPT_GSI:
 171                 return QPT_SQP;
 172         case IB_QPT_RC:
 173                 return QPT_RC;
 174         case IB_QPT_UC:
 175                 return QPT_UC;
 176         case IB_QPT_UD:
 177                 return QPT_UD;
 178         default:
 179                 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
 180                 return -EINVAL;
 181         }
 182 }
 183
 184 static inline enum ib_qp_statetrans get_modqp_statetrans(int ib_fromstate,
 185                                                          int ib_tostate)
 186 {
 187         int index = -EINVAL;
 188         switch (ib_tostate) {
 189         case IB_QPS_RESET:
 190                 index = IB_QPST_ANY2RESET;
 191                 break;
 192         case IB_QPS_INIT:
 193                 switch (ib_fromstate) {
 194                 case IB_QPS_RESET:
 195                         index = IB_QPST_RESET2INIT;
 196                         break;
 197                 case IB_QPS_INIT:
 198                         index = IB_QPST_INIT2INIT;
 199                         break;
 200                 }
 201                 break;
 202         case IB_QPS_RTR:
 203                 if (ib_fromstate == IB_QPS_INIT)
 204                         index = IB_QPST_INIT2RTR;
 205                 break;
 206         case IB_QPS_RTS:
 207                 switch (ib_fromstate) {
 208                 case IB_QPS_RTR:
 209                         index = IB_QPST_RTR2RTS;
 210                         break;
 211                 case IB_QPS_RTS:
 212                         index = IB_QPST_RTS2RTS;
 213                         break;
 214                 case IB_QPS_SQD:
 215                         index = IB_QPST_SQD2RTS;
 216                         break;
 217                 case IB_QPS_SQE:
 218                         index = IB_QPST_SQE2RTS;
 219                         break;
 220                 }
 221                 break;
 222         case IB_QPS_SQD:
 223                 if (ib_fromstate == IB_QPS_RTS)
 224                         index = IB_QPST_RTS2SQD;
 225                 break;
 226         case IB_QPS_SQE:
 227                 break;
 228         case IB_QPS_ERR:
 229                 index = IB_QPST_ANY2ERR;
 230                 break;
 231         default:
 232                 break;
 233         }
 234         return index;
 235 }
 236
 237 enum ehca_service_type {
 238         ST_RC = 0,
 239         ST_UC = 1,
 240         ST_RD = 2,
 241         ST_UD = 3
 242 };
 243
 244 /*
 245  * ibqptype2servicetype returns hcp service type corresponding to given
 246  * ib qp type used by create_qp()
 247  */
 248 static inline int ibqptype2servicetype(enum ib_qp_type ibqptype)
 249 {
 250         switch (ibqptype) {
 251         case IB_QPT_SMI:
 252         case IB_QPT_GSI:
 253                 return ST_UD;
 254         case IB_QPT_RC:
 255                 return ST_RC;
 256         case IB_QPT_UC:
 257                 return ST_UC;
 258         case IB_QPT_UD:
 259                 return ST_UD;
 260         case IB_QPT_RAW_IPV6:
 261                 return -EINVAL;
 262         case IB_QPT_RAW_ETY:
 263                 return -EINVAL;
 264         default:
 265                 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
 266                 return -EINVAL;
 267         }
 268 }
 269
 270 /*
 271  * init_qp_queues initializes/constructs r/squeue and registers queue pages.
 272  */
 273 static inline int init_qp_queues(struct ehca_shca *shca,
 274                                  struct ehca_qp *my_qp,
 275                                  int nr_sq_pages,
 276                                  int nr_rq_pages,
 277                                  int swqe_size,
 278                                  int rwqe_size,
 279                                  int nr_send_sges, int nr_receive_sges)
 280 {
 281         int ret, cnt, ipz_rc;
 282         void *vpage;
 283         u64 rpage, h_ret;
 284         struct ib_device *ib_dev = &shca->ib_device;
 285         struct ipz_adapter_handle ipz_hca_handle = shca->ipz_hca_handle;
 286
 287         ipz_rc = ipz_queue_ctor(&my_qp->ipz_squeue,
 288                                 nr_sq_pages,
 289                                 EHCA_PAGESIZE, swqe_size, nr_send_sges);
 290         if (!ipz_rc) {
 291                 ehca_err(ib_dev,"Cannot allocate page for squeue. ipz_rc=%x",
 292                          ipz_rc);
 293                 return -EBUSY;
 294         }
 295
 296         ipz_rc = ipz_queue_ctor(&my_qp->ipz_rqueue,
 297                                 nr_rq_pages,
 298                                 EHCA_PAGESIZE, rwqe_size, nr_receive_sges);
 299         if (!ipz_rc) {
 300                 ehca_err(ib_dev, "Cannot allocate page for rqueue. ipz_rc=%x",
 301                          ipz_rc);
 302                 ret = -EBUSY;
 303                 goto init_qp_queues0;
 304         }
 305         /* register SQ pages */
 306         for (cnt = 0; cnt < nr_sq_pages; cnt++) {
 307                 vpage = ipz_qpageit_get_inc(&my_qp->ipz_squeue);
 308                 if (!vpage) {
 309                         ehca_err(ib_dev, "SQ ipz_qpageit_get_inc() "
 310                                  "failed p_vpage= %p", vpage);
 311                         ret = -EINVAL;
 312                         goto init_qp_queues1;
 313                 }
 314                 rpage = virt_to_abs(vpage);
 315
 316                 h_ret = hipz_h_register_rpage_qp(ipz_hca_handle,
 317                                                  my_qp->ipz_qp_handle,
 318                                                  &my_qp->pf, 0, 0,
 319                                                  rpage, 1,
 320                                                  my_qp->galpas.kernel);
 321                 if (h_ret < H_SUCCESS) {
 322                         ehca_err(ib_dev, "SQ hipz_qp_register_rpage()"
 323                                  " failed rc=%lx", h_ret);
 324                         ret = ehca2ib_return_code(h_ret);
 325                         goto init_qp_queues1;
 326                 }
 327         }
 328
 329         ipz_qeit_reset(&my_qp->ipz_squeue);
 330
 331         /* register RQ pages */
 332         for (cnt = 0; cnt < nr_rq_pages; cnt++) {
 333                 vpage = ipz_qpageit_get_inc(&my_qp->ipz_rqueue);
 334                 if (!vpage) {
 335                         ehca_err(ib_dev, "RQ ipz_qpageit_get_inc() "
 336                                  "failed p_vpage = %p", vpage);
 337                         ret = -EINVAL;
 338                         goto init_qp_queues1;
 339                 }
 340
 341                 rpage = virt_to_abs(vpage);
 342
 343                 h_ret = hipz_h_register_rpage_qp(ipz_hca_handle,
 344                                                  my_qp->ipz_qp_handle,
 345                                                  &my_qp->pf, 0, 1,
 346                                                  rpage, 1,my_qp->galpas.kernel);
 347                 if (h_ret < H_SUCCESS) {
 348                         ehca_err(ib_dev, "RQ hipz_qp_register_rpage() failed "
 349                                  "rc=%lx", h_ret);
 350                         ret = ehca2ib_return_code(h_ret);
 351                         goto init_qp_queues1;
 352                 }
 353                 if (cnt == (nr_rq_pages - 1)) { /* last page! */
 354                         if (h_ret != H_SUCCESS) {
 355                                 ehca_err(ib_dev, "RQ hipz_qp_register_rpage() "
 356                                          "h_ret= %lx ", h_ret);
 357                                 ret = ehca2ib_return_code(h_ret);
 358                                 goto init_qp_queues1;
 359                         }
 360                         vpage = ipz_qpageit_get_inc(&my_qp->ipz_rqueue);
 361                         if (vpage) {
 362                                 ehca_err(ib_dev, "ipz_qpageit_get_inc() "
 363                                          "should not succeed vpage=%p", vpage);
 364                                 ret = -EINVAL;
 365                                 goto init_qp_queues1;
 366                         }
 367                 } else {
 368                         if (h_ret != H_PAGE_REGISTERED) {
 369                                 ehca_err(ib_dev, "RQ hipz_qp_register_rpage() "
 370                                          "h_ret= %lx ", h_ret);
 371                                 ret = ehca2ib_return_code(h_ret);
 372                                 goto init_qp_queues1;
 373                         }
 374                 }
 375         }
 376
 377         ipz_qeit_reset(&my_qp->ipz_rqueue);
 378
 379         return 0;
 380
 381 init_qp_queues1:
 382         ipz_queue_dtor(&my_qp->ipz_rqueue);
 383 init_qp_queues0:
 384         ipz_queue_dtor(&my_qp->ipz_squeue);
 385         return ret;
 386 }
 387
 388 struct ib_qp *ehca_create_qp(struct ib_pd *pd,
 389                              struct ib_qp_init_attr *init_attr,
 390                              struct ib_udata *udata)
 391 {
 392         static int da_rc_msg_size[]={ 128, 256, 512, 1024, 2048, 4096 };
 393         static int da_ud_sq_msg_size[]={ 128, 384, 896, 1920, 3968 };
 394         struct ehca_qp *my_qp;
 395         struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
 396         struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
 397                                               ib_device);
 398         struct ib_ucontext *context = NULL;
 399         u64 h_ret;
 400         int max_send_sge, max_recv_sge, ret;
 401
 402         /* h_call's out parameters */
 403         struct ehca_alloc_qp_parms parms;
 404         u32 swqe_size = 0, rwqe_size = 0;
 405         u8 daqp_completion, isdaqp;
 406         unsigned long flags;
 407
 408         if (init_attr->sq_sig_type != IB_SIGNAL_REQ_WR &&
 409                 init_attr->sq_sig_type != IB_SIGNAL_ALL_WR) {
 410                 ehca_err(pd->device, "init_attr->sg_sig_type=%x not allowed",
 411                          init_attr->sq_sig_type);
 412                 return ERR_PTR(-EINVAL);
 413         }
 414
 415         /* save daqp completion bits */
 416         daqp_completion = init_attr->qp_type & 0x60;
 417         /* save daqp bit */
 418         isdaqp = (init_attr->qp_type & 0x80) ? 1 : 0;
 419         init_attr->qp_type = init_attr->qp_type & 0x1F;
 420
 421         if (init_attr->qp_type != IB_QPT_UD &&
 422             init_attr->qp_type != IB_QPT_SMI &&
 423             init_attr->qp_type != IB_QPT_GSI &&
 424             init_attr->qp_type != IB_QPT_UC &&
 425             init_attr->qp_type != IB_QPT_RC) {
 426                 ehca_err(pd->device, "wrong QP Type=%x", init_attr->qp_type);
 427                 return ERR_PTR(-EINVAL);
 428         }
 429         if ((init_attr->qp_type != IB_QPT_RC && init_attr->qp_type != IB_QPT_UD)
 430             && isdaqp) {
 431                 ehca_err(pd->device, "unsupported LL QP Type=%x",
 432                          init_attr->qp_type);
 433                 return ERR_PTR(-EINVAL);
 434         } else if (init_attr->qp_type == IB_QPT_RC && isdaqp &&
 435                    (init_attr->cap.max_send_wr > 255 ||
 436                     init_attr->cap.max_recv_wr > 255 )) {
 437                        ehca_err(pd->device, "Invalid Number of max_sq_wr =%x "
 438                                 "or max_rq_wr=%x for QP Type=%x",
 439                                 init_attr->cap.max_send_wr,
 440                                 init_attr->cap.max_recv_wr,init_attr->qp_type);
 441                        return ERR_PTR(-EINVAL);
 442         } else if (init_attr->qp_type == IB_QPT_UD && isdaqp &&
 443                   init_attr->cap.max_send_wr > 255) {
 444                 ehca_err(pd->device,
 445                          "Invalid Number of max_send_wr=%x for UD QP_TYPE=%x",
 446                          init_attr->cap.max_send_wr, init_attr->qp_type);
 447                 return ERR_PTR(-EINVAL);
 448         }
 449
 450         if (pd->uobject && udata)
 451                 context = pd->uobject->context;
 452
 453         my_qp = kmem_cache_zalloc(qp_cache, GFP_KERNEL);
 454         if (!my_qp) {
 455                 ehca_err(pd->device, "pd=%p not enough memory to alloc qp", pd);
 456                 return ERR_PTR(-ENOMEM);
 457         }
 458
 459         memset (&parms, 0, sizeof(struct ehca_alloc_qp_parms));
 460         spin_lock_init(&my_qp->spinlock_s);
 461         spin_lock_init(&my_qp->spinlock_r);
 462
 463         my_qp->recv_cq =
 464                 container_of(init_attr->recv_cq, struct ehca_cq, ib_cq);
 465         my_qp->send_cq =
 466                 container_of(init_attr->send_cq, struct ehca_cq, ib_cq);
 467
 468         my_qp->init_attr = *init_attr;
 469
 470         do {
 471                 if (!idr_pre_get(&ehca_qp_idr, GFP_KERNEL)) {
 472                         ret = -ENOMEM;
 473                         ehca_err(pd->device, "Can't reserve idr resources.");
 474                         goto create_qp_exit0;
 475                 }
 476
 477                 spin_lock_irqsave(&ehca_qp_idr_lock, flags);
 478                 ret = idr_get_new(&ehca_qp_idr, my_qp, &my_qp->token);
 479                 spin_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 480
 481         } while (ret == -EAGAIN);
 482
 483         if (ret) {
 484                 ret = -ENOMEM;
 485                 ehca_err(pd->device, "Can't allocate new idr entry.");
 486                 goto create_qp_exit0;
 487         }
 488
 489         parms.servicetype = ibqptype2servicetype(init_attr->qp_type);
 490         if (parms.servicetype < 0) {
 491                 ret = -EINVAL;
 492                 ehca_err(pd->device, "Invalid qp_type=%x", init_attr->qp_type);
 493                 goto create_qp_exit0;
 494         }
 495
 496         if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
 497                 parms.sigtype = HCALL_SIGT_EVERY;
 498         else
 499                 parms.sigtype = HCALL_SIGT_BY_WQE;
 500
 501         /* UD_AV CIRCUMVENTION */
 502         max_send_sge = init_attr->cap.max_send_sge;
 503         max_recv_sge = init_attr->cap.max_recv_sge;
 504         if (IB_QPT_UD == init_attr->qp_type ||
 505             IB_QPT_GSI == init_attr->qp_type ||
 506             IB_QPT_SMI == init_attr->qp_type) {
 507                 max_send_sge += 2;
 508                 max_recv_sge += 2;
 509         }
 510
 511         parms.ipz_eq_handle = shca->eq.ipz_eq_handle;
 512         parms.daqp_ctrl = isdaqp | daqp_completion;
 513         parms.pd = my_pd->fw_pd;
 514         parms.max_recv_sge = max_recv_sge;
 515         parms.max_send_sge = max_send_sge;
 516
 517         h_ret = hipz_h_alloc_resource_qp(shca->ipz_hca_handle, my_qp, &parms);
 518
 519         if (h_ret != H_SUCCESS) {
 520                 ehca_err(pd->device, "h_alloc_resource_qp() failed h_ret=%lx",
 521                          h_ret);
 522                 ret = ehca2ib_return_code(h_ret);
 523                 goto create_qp_exit1;
 524         }
 525
 526         switch (init_attr->qp_type) {
 527         case IB_QPT_RC:
 528                 if (isdaqp == 0) {
 529                         swqe_size = offsetof(struct ehca_wqe, u.nud.sg_list[
 530                                              (parms.act_nr_send_sges)]);
 531                         rwqe_size = offsetof(struct ehca_wqe, u.nud.sg_list[
 532                                              (parms.act_nr_recv_sges)]);
 533                 } else { /* for daqp we need to use msg size, not wqe size */
 534                         swqe_size = da_rc_msg_size[max_send_sge];
 535                         rwqe_size = da_rc_msg_size[max_recv_sge];
 536                         parms.act_nr_send_sges = 1;
 537                         parms.act_nr_recv_sges = 1;
 538                 }
 539                 break;
 540         case IB_QPT_UC:
 541                 swqe_size = offsetof(struct ehca_wqe,
 542                                      u.nud.sg_list[parms.act_nr_send_sges]);
 543                 rwqe_size = offsetof(struct ehca_wqe,
 544                                      u.nud.sg_list[parms.act_nr_recv_sges]);
 545                 break;
 546
 547         case IB_QPT_UD:
 548         case IB_QPT_GSI:
 549         case IB_QPT_SMI:
 550                 /* UD circumvention */
 551                 parms.act_nr_recv_sges -= 2;
 552                 parms.act_nr_send_sges -= 2;
 553                 if (isdaqp) {
 554                         swqe_size = da_ud_sq_msg_size[max_send_sge];
 555                         rwqe_size = da_rc_msg_size[max_recv_sge];
 556                         parms.act_nr_send_sges = 1;
 557                         parms.act_nr_recv_sges = 1;
 558                 } else {
 559                         swqe_size = offsetof(struct ehca_wqe,
 560                                              u.ud_av.sg_list[parms.act_nr_send_sges]);
 561                         rwqe_size = offsetof(struct ehca_wqe,
 562                                              u.ud_av.sg_list[parms.act_nr_recv_sges]);
 563                 }
 564
 565                 if (IB_QPT_GSI == init_attr->qp_type ||
 566                     IB_QPT_SMI == init_attr->qp_type) {
 567                         parms.act_nr_send_wqes = init_attr->cap.max_send_wr;
 568                         parms.act_nr_recv_wqes = init_attr->cap.max_recv_wr;
 569                         parms.act_nr_send_sges = init_attr->cap.max_send_sge;
 570                         parms.act_nr_recv_sges = init_attr->cap.max_recv_sge;
 571                         my_qp->real_qp_num =
 572                                 (init_attr->qp_type == IB_QPT_SMI) ? 0 : 1;
 573                 }
 574
 575                 break;
 576
 577         default:
 578                 break;
 579         }
 580
 581         /* initializes r/squeue and registers queue pages */
 582         ret = init_qp_queues(shca, my_qp,
 583                              parms.nr_sq_pages, parms.nr_rq_pages,
 584                              swqe_size, rwqe_size,
 585                              parms.act_nr_send_sges, parms.act_nr_recv_sges);
 586         if (ret) {
 587                 ehca_err(pd->device,
 588                          "Couldn't initialize r/squeue and pages ret=%x", ret);
 589                 goto create_qp_exit2;
 590         }
 591
 592         my_qp->ib_qp.pd = &my_pd->ib_pd;
 593         my_qp->ib_qp.device = my_pd->ib_pd.device;
 594
 595         my_qp->ib_qp.recv_cq = init_attr->recv_cq;
 596         my_qp->ib_qp.send_cq = init_attr->send_cq;
 597
 598         my_qp->ib_qp.qp_num = my_qp->real_qp_num;
 599         my_qp->ib_qp.qp_type = init_attr->qp_type;
 600
 601         my_qp->qp_type = init_attr->qp_type;
 602         my_qp->ib_qp.srq = init_attr->srq;
 603
 604         my_qp->ib_qp.qp_context = init_attr->qp_context;
 605         my_qp->ib_qp.event_handler = init_attr->event_handler;
 606
 607         init_attr->cap.max_inline_data = 0; /* not supported yet */
 608         init_attr->cap.max_recv_sge = parms.act_nr_recv_sges;
 609         init_attr->cap.max_recv_wr = parms.act_nr_recv_wqes;
 610         init_attr->cap.max_send_sge = parms.act_nr_send_sges;
 611         init_attr->cap.max_send_wr = parms.act_nr_send_wqes;
 612
 613         /* NOTE: define_apq0() not supported yet */
 614         if (init_attr->qp_type == IB_QPT_GSI) {
 615                 h_ret = ehca_define_sqp(shca, my_qp, init_attr);
 616                 if (h_ret != H_SUCCESS) {
 617                         ehca_err(pd->device, "ehca_define_sqp() failed rc=%lx",
 618                                  h_ret);
 619                         ret = ehca2ib_return_code(h_ret);
 620                         goto create_qp_exit3;
 621                 }
 622         }
 623         if (init_attr->send_cq) {
 624                 struct ehca_cq *cq = container_of(init_attr->send_cq,
 625                                                   struct ehca_cq, ib_cq);
 626                 ret = ehca_cq_assign_qp(cq, my_qp);
 627                 if (ret) {
 628                         ehca_err(pd->device, "Couldn't assign qp to send_cq ret=%x",
 629                                  ret);
 630                         goto create_qp_exit3;
 631                 }
 632                 my_qp->send_cq = cq;
 633         }
 634         /* copy queues, galpa data to user space */
 635         if (context && udata) {
 636                 struct ipz_queue *ipz_rqueue = &my_qp->ipz_rqueue;
 637                 struct ipz_queue *ipz_squeue = &my_qp->ipz_squeue;
 638                 struct ehca_create_qp_resp resp;
 639                 memset(&resp, 0, sizeof(resp));
 640
 641                 resp.qp_num = my_qp->real_qp_num;
 642                 resp.token = my_qp->token;
 643                 resp.qp_type = my_qp->qp_type;
 644                 resp.qkey = my_qp->qkey;
 645                 resp.real_qp_num = my_qp->real_qp_num;
 646                 /* rqueue properties */
 647                 resp.ipz_rqueue.qe_size = ipz_rqueue->qe_size;
 648                 resp.ipz_rqueue.act_nr_of_sg = ipz_rqueue->act_nr_of_sg;
 649                 resp.ipz_rqueue.queue_length = ipz_rqueue->queue_length;
 650                 resp.ipz_rqueue.pagesize = ipz_rqueue->pagesize;
 651                 resp.ipz_rqueue.toggle_state = ipz_rqueue->toggle_state;
 652                 /* squeue properties */
 653                 resp.ipz_squeue.qe_size = ipz_squeue->qe_size;
 654                 resp.ipz_squeue.act_nr_of_sg = ipz_squeue->act_nr_of_sg;
 655                 resp.ipz_squeue.queue_length = ipz_squeue->queue_length;
 656                 resp.ipz_squeue.pagesize = ipz_squeue->pagesize;
 657                 resp.ipz_squeue.toggle_state = ipz_squeue->toggle_state;
 658                 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
 659                         ehca_err(pd->device, "Copy to udata failed");
 660                         ret = -EINVAL;
 661                         goto create_qp_exit3;
 662                 }
 663         }
 664
 665         return &my_qp->ib_qp;
 666
 667 create_qp_exit3:
 668         ipz_queue_dtor(&my_qp->ipz_rqueue);
 669         ipz_queue_dtor(&my_qp->ipz_squeue);
 670
 671 create_qp_exit2:
 672         hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
 673
 674 create_qp_exit1:
 675         spin_lock_irqsave(&ehca_qp_idr_lock, flags);
 676         idr_remove(&ehca_qp_idr, my_qp->token);
 677         spin_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 678
 679 create_qp_exit0:
 680         kmem_cache_free(qp_cache, my_qp);
 681         return ERR_PTR(ret);
 682 }
 683
 684 /*
 685  * prepare_sqe_rts called by internal_modify_qp() at trans sqe -> rts
 686  * set purge bit of bad wqe and subsequent wqes to avoid reentering sqe
 687  * returns total number of bad wqes in bad_wqe_cnt
 688  */
 689 static int prepare_sqe_rts(struct ehca_qp *my_qp, struct ehca_shca *shca,
 690                            int *bad_wqe_cnt)
 691 {
 692         u64 h_ret;
 693         struct ipz_queue *squeue;
 694         void *bad_send_wqe_p, *bad_send_wqe_v;
 695         u64 q_ofs;
 696         struct ehca_wqe *wqe;
 697         int qp_num = my_qp->ib_qp.qp_num;
 698
 699         /* get send wqe pointer */
 700         h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
 701                                            my_qp->ipz_qp_handle, &my_qp->pf,
 702                                            &bad_send_wqe_p, NULL, 2);
 703         if (h_ret != H_SUCCESS) {
 704                 ehca_err(&shca->ib_device, "hipz_h_disable_and_get_wqe() failed"
 705                          " ehca_qp=%p qp_num=%x h_ret=%lx",
 706                          my_qp, qp_num, h_ret);
 707                 return ehca2ib_return_code(h_ret);
 708         }
 709         bad_send_wqe_p = (void*)((u64)bad_send_wqe_p & (~(1L<<63)));
 710         ehca_dbg(&shca->ib_device, "qp_num=%x bad_send_wqe_p=%p",
 711                  qp_num, bad_send_wqe_p);
 712         /* convert wqe pointer to vadr */
 713         bad_send_wqe_v = abs_to_virt((u64)bad_send_wqe_p);
 714         if (ehca_debug_level)
 715                 ehca_dmp(bad_send_wqe_v, 32, "qp_num=%x bad_wqe", qp_num);
 716         squeue = &my_qp->ipz_squeue;
 717         if (ipz_queue_abs_to_offset(squeue, (u64)bad_send_wqe_p, &q_ofs)) {
 718                 ehca_err(&shca->ib_device, "failed to get wqe offset qp_num=%x"
 719                          " bad_send_wqe_p=%p", qp_num, bad_send_wqe_p);
 720                 return -EFAULT;
 721         }
 722
 723         /* loop sets wqe's purge bit */
 724         wqe = (struct ehca_wqe*)ipz_qeit_calc(squeue, q_ofs);
 725         *bad_wqe_cnt = 0;
 726         while (wqe->optype != 0xff && wqe->wqef != 0xff) {
 727                 if (ehca_debug_level)
 728                         ehca_dmp(wqe, 32, "qp_num=%x wqe", qp_num);
 729                 wqe->nr_of_data_seg = 0; /* suppress data access */
 730                 wqe->wqef = WQEF_PURGE; /* WQE to be purged */
 731                 q_ofs = ipz_queue_advance_offset(squeue, q_ofs);
 732                 wqe = (struct ehca_wqe*)ipz_qeit_calc(squeue, q_ofs);
 733                 *bad_wqe_cnt = (*bad_wqe_cnt)+1;
 734         }
 735         /*
 736          * bad wqe will be reprocessed and ignored when pol_cq() is called,
 737          *  i.e. nr of wqes with flush error status is one less
 738          */
 739         ehca_dbg(&shca->ib_device, "qp_num=%x flusherr_wqe_cnt=%x",
 740                  qp_num, (*bad_wqe_cnt)-1);
 741         wqe->wqef = 0;
 742
 743         return 0;
 744 }
 745
 746 /*
 747  * internal_modify_qp with circumvention to handle aqp0 properly
 748  * smi_reset2init indicates if this is an internal reset-to-init-call for
 749  * smi. This flag must always be zero if called from ehca_modify_qp()!
 750  * This internal func was intorduced to avoid recursion of ehca_modify_qp()!
 751  */
 752 static int internal_modify_qp(struct ib_qp *ibqp,
 753                               struct ib_qp_attr *attr,
 754                               int attr_mask, int smi_reset2init)
 755 {
 756         enum ib_qp_state qp_cur_state, qp_new_state;
 757         int cnt, qp_attr_idx, ret = 0;
 758         enum ib_qp_statetrans statetrans;
 759         struct hcp_modify_qp_control_block *mqpcb;
 760         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
 761         struct ehca_shca *shca =
 762                 container_of(ibqp->pd->device, struct ehca_shca, ib_device);
 763         u64 update_mask;
 764         u64 h_ret;
 765         int bad_wqe_cnt = 0;
 766         int squeue_locked = 0;
 767         unsigned long spl_flags = 0;
 768
 769         /* do query_qp to obtain current attr values */
 770         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 771         if (!mqpcb) {
 772                 ehca_err(ibqp->device, "Could not get zeroed page for mqpcb "
 773                          "ehca_qp=%p qp_num=%x ", my_qp, ibqp->qp_num);
 774                 return -ENOMEM;
 775         }
 776
 777         h_ret = hipz_h_query_qp(shca->ipz_hca_handle,
 778                                 my_qp->ipz_qp_handle,
 779                                 &my_qp->pf,
 780                                 mqpcb, my_qp->galpas.kernel);
 781         if (h_ret != H_SUCCESS) {
 782                 ehca_err(ibqp->device, "hipz_h_query_qp() failed "
 783                          "ehca_qp=%p qp_num=%x h_ret=%lx",
 784                          my_qp, ibqp->qp_num, h_ret);
 785                 ret = ehca2ib_return_code(h_ret);
 786                 goto modify_qp_exit1;
 787         }
 788
 789         qp_cur_state = ehca2ib_qp_state(mqpcb->qp_state);
 790
 791         if (qp_cur_state == -EINVAL) {  /* invalid qp state */
 792                 ret = -EINVAL;
 793                 ehca_err(ibqp->device, "Invalid current ehca_qp_state=%x "
 794                          "ehca_qp=%p qp_num=%x",
 795                          mqpcb->qp_state, my_qp, ibqp->qp_num);
 796                 goto modify_qp_exit1;
 797         }
 798         /*
 799          * circumvention to set aqp0 initial state to init
 800          * as expected by IB spec
 801          */
 802         if (smi_reset2init == 0 &&
 803             ibqp->qp_type == IB_QPT_SMI &&
 804             qp_cur_state == IB_QPS_RESET &&
 805             (attr_mask & IB_QP_STATE) &&
 806             attr->qp_state == IB_QPS_INIT) { /* RESET -> INIT */
 807                 struct ib_qp_attr smiqp_attr = {
 808                         .qp_state = IB_QPS_INIT,
 809                         .port_num = my_qp->init_attr.port_num,
 810                         .pkey_index = 0,
 811                         .qkey = 0
 812                 };
 813                 int smiqp_attr_mask = IB_QP_STATE | IB_QP_PORT |
 814                         IB_QP_PKEY_INDEX | IB_QP_QKEY;
 815                 int smirc = internal_modify_qp(
 816                         ibqp, &smiqp_attr, smiqp_attr_mask, 1);
 817                 if (smirc) {
 818                         ehca_err(ibqp->device, "SMI RESET -> INIT failed. "
 819                                  "ehca_modify_qp() rc=%x", smirc);
 820                         ret = H_PARAMETER;
 821                         goto modify_qp_exit1;
 822                 }
 823                 qp_cur_state = IB_QPS_INIT;
 824                 ehca_dbg(ibqp->device, "SMI RESET -> INIT succeeded");
 825         }
 826         /* is transmitted current state  equal to "real" current state */
 827         if ((attr_mask & IB_QP_CUR_STATE) &&
 828             qp_cur_state != attr->cur_qp_state) {
 829                 ret = -EINVAL;
 830                 ehca_err(ibqp->device,
 831                          "Invalid IB_QP_CUR_STATE attr->curr_qp_state=%x <>"
 832                          " actual cur_qp_state=%x. ehca_qp=%p qp_num=%x",
 833                          attr->cur_qp_state, qp_cur_state, my_qp, ibqp->qp_num);
 834                 goto modify_qp_exit1;
 835         }
 836
 837         ehca_dbg(ibqp->device,"ehca_qp=%p qp_num=%x current qp_state=%x "
 838                  "new qp_state=%x attribute_mask=%x",
 839                  my_qp, ibqp->qp_num, qp_cur_state, attr->qp_state, attr_mask);
 840
 841         qp_new_state = attr_mask & IB_QP_STATE ? attr->qp_state : qp_cur_state;
 842         if (!smi_reset2init &&
 843             !ib_modify_qp_is_ok(qp_cur_state, qp_new_state, ibqp->qp_type,
 844                                 attr_mask)) {
 845                 ret = -EINVAL;
 846                 ehca_err(ibqp->device,
 847                          "Invalid qp transition new_state=%x cur_state=%x "
 848                          "ehca_qp=%p qp_num=%x attr_mask=%x", qp_new_state,
 849                          qp_cur_state, my_qp, ibqp->qp_num, attr_mask);
 850                 goto modify_qp_exit1;
 851         }
 852
 853         if ((mqpcb->qp_state = ib2ehca_qp_state(qp_new_state)))
 854                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
 855         else {
 856                 ret = -EINVAL;
 857                 ehca_err(ibqp->device, "Invalid new qp state=%x "
 858                          "ehca_qp=%p qp_num=%x",
 859                          qp_new_state, my_qp, ibqp->qp_num);
 860                 goto modify_qp_exit1;
 861         }
 862
 863         /* retrieve state transition struct to get req and opt attrs */
 864         statetrans = get_modqp_statetrans(qp_cur_state, qp_new_state);
 865         if (statetrans < 0) {
 866                 ret = -EINVAL;
 867                 ehca_err(ibqp->device, "<INVALID STATE CHANGE> qp_cur_state=%x "
 868                          "new_qp_state=%x State_xsition=%x ehca_qp=%p "
 869                          "qp_num=%x", qp_cur_state, qp_new_state,
 870                          statetrans, my_qp, ibqp->qp_num);
 871                 goto modify_qp_exit1;
 872         }
 873
 874         qp_attr_idx = ib2ehcaqptype(ibqp->qp_type);
 875
 876         if (qp_attr_idx < 0) {
 877                 ret = qp_attr_idx;
 878                 ehca_err(ibqp->device,
 879                          "Invalid QP type=%x ehca_qp=%p qp_num=%x",
 880                          ibqp->qp_type, my_qp, ibqp->qp_num);
 881                 goto modify_qp_exit1;
 882         }
 883
 884         ehca_dbg(ibqp->device,
 885                  "ehca_qp=%p qp_num=%x <VALID STATE CHANGE> qp_state_xsit=%x",
 886                  my_qp, ibqp->qp_num, statetrans);
 887
 888         /* sqe -> rts: set purge bit of bad wqe before actual trans */
 889         if ((my_qp->qp_type == IB_QPT_UD ||
 890              my_qp->qp_type == IB_QPT_GSI ||
 891              my_qp->qp_type == IB_QPT_SMI) &&
 892             statetrans == IB_QPST_SQE2RTS) {
 893                 /* mark next free wqe if kernel */
 894                 if (!ibqp->uobject) {
 895                         struct ehca_wqe *wqe;
 896                         /* lock send queue */
 897                         spin_lock_irqsave(&my_qp->spinlock_s, spl_flags);
 898                         squeue_locked = 1;
 899                         /* mark next free wqe */
 900                         wqe = (struct ehca_wqe*)
 901                                 ipz_qeit_get(&my_qp->ipz_squeue);
 902                         wqe->optype = wqe->wqef = 0xff;
 903                         ehca_dbg(ibqp->device, "qp_num=%x next_free_wqe=%p",
 904                                  ibqp->qp_num, wqe);
 905                 }
 906                 ret = prepare_sqe_rts(my_qp, shca, &bad_wqe_cnt);
 907                 if (ret) {
 908                         ehca_err(ibqp->device, "prepare_sqe_rts() failed "
 909                                  "ehca_qp=%p qp_num=%x ret=%x",
 910                                  my_qp, ibqp->qp_num, ret);
 911                         goto modify_qp_exit2;
 912                 }
 913         }
 914
 915         /*
 916          * enable RDMA_Atomic_Control if reset->init und reliable con
 917          * this is necessary since gen2 does not provide that flag,
 918          * but pHyp requires it
 919          */
 920         if (statetrans == IB_QPST_RESET2INIT &&
 921             (ibqp->qp_type == IB_QPT_RC || ibqp->qp_type == IB_QPT_UC)) {
 922                 mqpcb->rdma_atomic_ctrl = 3;
 923                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RDMA_ATOMIC_CTRL, 1);
 924         }
 925         /* circ. pHyp requires #RDMA/Atomic Resp Res for UC INIT -> RTR */
 926         if (statetrans == IB_QPST_INIT2RTR &&
 927             (ibqp->qp_type == IB_QPT_UC) &&
 928             !(attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)) {
 929                 mqpcb->rdma_nr_atomic_resp_res = 1; /* default to 1 */
 930                 update_mask |=
 931                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
 932         }
 933
 934         if (attr_mask & IB_QP_PKEY_INDEX) {
 935                 mqpcb->prim_p_key_idx = attr->pkey_index;
 936                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_P_KEY_IDX, 1);
 937         }
 938         if (attr_mask & IB_QP_PORT) {
 939                 if (attr->port_num < 1 || attr->port_num > shca->num_ports) {
 940                         ret = -EINVAL;
 941                         ehca_err(ibqp->device, "Invalid port=%x. "
 942                                  "ehca_qp=%p qp_num=%x num_ports=%x",
 943                                  attr->port_num, my_qp, ibqp->qp_num,
 944                                  shca->num_ports);
 945                         goto modify_qp_exit2;
 946                 }
 947                 mqpcb->prim_phys_port = attr->port_num;
 948                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_PHYS_PORT, 1);
 949         }
 950         if (attr_mask & IB_QP_QKEY) {
 951                 mqpcb->qkey = attr->qkey;
 952                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_QKEY, 1);
 953         }
 954         if (attr_mask & IB_QP_AV) {
 955                 int ah_mult = ib_rate_to_mult(attr->ah_attr.static_rate);
 956                 int ehca_mult = ib_rate_to_mult(shca->sport[my_qp->
 957                                                 init_attr.port_num].rate);
 958
 959                 mqpcb->dlid = attr->ah_attr.dlid;
 960                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DLID, 1);
 961                 mqpcb->source_path_bits = attr->ah_attr.src_path_bits;
 962                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS, 1);
 963                 mqpcb->service_level = attr->ah_attr.sl;
 964                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL, 1);
 965
 966                 if (ah_mult < ehca_mult)
 967                         mqpcb->max_static_rate = (ah_mult > 0) ?
 968                         ((ehca_mult - 1) / ah_mult) : 0;
 969                 else
 970                         mqpcb->max_static_rate = 0;
 971
 972                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE, 1);
 973
 974                 /*
 975                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
 976                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
 977                  */
 978                 if (attr->ah_attr.ah_flags == IB_AH_GRH) {
 979                         mqpcb->send_grh_flag = 1 << 31;
 980                         update_mask |=
 981                                 EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
 982                         mqpcb->source_gid_idx = attr->ah_attr.grh.sgid_index;
 983                         update_mask |=
 984                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX, 1);
 985
 986                         for (cnt = 0; cnt < 16; cnt++)
 987                                 mqpcb->dest_gid.byte[cnt] =
 988                                         attr->ah_attr.grh.dgid.raw[cnt];
 989
 990                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_GID, 1);
 991                         mqpcb->flow_label = attr->ah_attr.grh.flow_label;
 992                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL, 1);
 993                         mqpcb->hop_limit = attr->ah_attr.grh.hop_limit;
 994                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT, 1);
 995                         mqpcb->traffic_class = attr->ah_attr.grh.traffic_class;
 996                         update_mask |=
 997                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS, 1);
 998                 }
 999         }
1000
1001         if (attr_mask & IB_QP_PATH_MTU) {
1002                 mqpcb->path_mtu = attr->path_mtu;
1003                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PATH_MTU, 1);
1004         }
1005         if (attr_mask & IB_QP_TIMEOUT) {
1006                 mqpcb->timeout = attr->timeout;
1007                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT, 1);
1008         }
1009         if (attr_mask & IB_QP_RETRY_CNT) {
1010                 mqpcb->retry_count = attr->retry_cnt;
1011                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT, 1);
1012         }
1013         if (attr_mask & IB_QP_RNR_RETRY) {
1014                 mqpcb->rnr_retry_count = attr->rnr_retry;
1015                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT, 1);
1016         }
1017         if (attr_mask & IB_QP_RQ_PSN) {
1018                 mqpcb->receive_psn = attr->rq_psn;
1019                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RECEIVE_PSN, 1);
1020         }
1021         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1022                 mqpcb->rdma_nr_atomic_resp_res = attr->max_dest_rd_atomic < 3 ?
1023                         attr->max_dest_rd_atomic : 2;
1024                 update_mask |=
1025                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1026         }
1027         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1028                 mqpcb->rdma_atomic_outst_dest_qp = attr->max_rd_atomic < 3 ?
1029                         attr->max_rd_atomic : 2;
1030                 update_mask |=
1031                         EHCA_BMASK_SET
1032                         (MQPCB_MASK_RDMA_ATOMIC_OUTST_DEST_QP, 1);
1033         }
1034         if (attr_mask & IB_QP_ALT_PATH) {
1035                 int ah_mult = ib_rate_to_mult(attr->alt_ah_attr.static_rate);
1036                 int ehca_mult = ib_rate_to_mult(
1037                         shca->sport[my_qp->init_attr.port_num].rate);
1038
1039                 mqpcb->dlid_al = attr->alt_ah_attr.dlid;
1040                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DLID_AL, 1);
1041                 mqpcb->source_path_bits_al = attr->alt_ah_attr.src_path_bits;
1042                 update_mask |=
1043                         EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS_AL, 1);
1044                 mqpcb->service_level_al = attr->alt_ah_attr.sl;
1045                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL_AL, 1);
1046
1047                 if (ah_mult < ehca_mult)
1048                         mqpcb->max_static_rate = (ah_mult > 0) ?
1049                         ((ehca_mult - 1) / ah_mult) : 0;
1050                 else
1051                         mqpcb->max_static_rate_al = 0;
1052
1053                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE_AL, 1);
1054
1055                 /*
1056                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
1057                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1058                  */
1059                 if (attr->alt_ah_attr.ah_flags == IB_AH_GRH) {
1060                         mqpcb->send_grh_flag_al = 1 << 31;
1061                         update_mask |=
1062                                 EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG_AL, 1);
1063                         mqpcb->source_gid_idx_al =
1064                                 attr->alt_ah_attr.grh.sgid_index;
1065                         update_mask |=
1066                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX_AL, 1);
1067
1068                         for (cnt = 0; cnt < 16; cnt++)
1069                                 mqpcb->dest_gid_al.byte[cnt] =
1070                                         attr->alt_ah_attr.grh.dgid.raw[cnt];
1071
1072                         update_mask |=
1073                                 EHCA_BMASK_SET(MQPCB_MASK_DEST_GID_AL, 1);
1074                         mqpcb->flow_label_al = attr->alt_ah_attr.grh.flow_label;
1075                         update_mask |=
1076                                 EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL_AL, 1);
1077                         mqpcb->hop_limit_al = attr->alt_ah_attr.grh.hop_limit;
1078                         update_mask |=
1079                                 EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT_AL, 1);
1080                         mqpcb->traffic_class_al =
1081                                 attr->alt_ah_attr.grh.traffic_class;
1082                         update_mask |=
1083                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS_AL, 1);
1084                 }
1085         }
1086
1087         if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1088                 mqpcb->min_rnr_nak_timer_field = attr->min_rnr_timer;
1089                 update_mask |=
1090                         EHCA_BMASK_SET(MQPCB_MASK_MIN_RNR_NAK_TIMER_FIELD, 1);
1091         }
1092
1093         if (attr_mask & IB_QP_SQ_PSN) {
1094                 mqpcb->send_psn = attr->sq_psn;
1095                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_PSN, 1);
1096         }
1097
1098         if (attr_mask & IB_QP_DEST_QPN) {
1099                 mqpcb->dest_qp_nr = attr->dest_qp_num;
1100                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_QP_NR, 1);
1101         }
1102
1103         if (attr_mask & IB_QP_PATH_MIG_STATE) {
1104                 mqpcb->path_migration_state = attr->path_mig_state;
1105                 update_mask |=
1106                         EHCA_BMASK_SET(MQPCB_MASK_PATH_MIGRATION_STATE, 1);
1107         }
1108
1109         if (attr_mask & IB_QP_CAP) {
1110                 mqpcb->max_nr_outst_send_wr = attr->cap.max_send_wr+1;
1111                 update_mask |=
1112                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_SEND_WR, 1);
1113                 mqpcb->max_nr_outst_recv_wr = attr->cap.max_recv_wr+1;
1114                 update_mask |=
1115                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_RECV_WR, 1);
1116                 /* no support for max_send/recv_sge yet */
1117         }
1118
1119         if (ehca_debug_level)
1120                 ehca_dmp(mqpcb, 4*70, "qp_num=%x", ibqp->qp_num);
1121
1122         h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1123                                  my_qp->ipz_qp_handle,
1124                                  &my_qp->pf,
1125                                  update_mask,
1126                                  mqpcb, my_qp->galpas.kernel);
1127
1128         if (h_ret != H_SUCCESS) {
1129                 ret = ehca2ib_return_code(h_ret);
1130                 ehca_err(ibqp->device, "hipz_h_modify_qp() failed rc=%lx "
1131                          "ehca_qp=%p qp_num=%x",h_ret, my_qp, ibqp->qp_num);
1132                 goto modify_qp_exit2;
1133         }
1134
1135         if ((my_qp->qp_type == IB_QPT_UD ||
1136              my_qp->qp_type == IB_QPT_GSI ||
1137              my_qp->qp_type == IB_QPT_SMI) &&
1138             statetrans == IB_QPST_SQE2RTS) {
1139                 /* doorbell to reprocessing wqes */
1140                 iosync(); /* serialize GAL register access */
1141                 hipz_update_sqa(my_qp, bad_wqe_cnt-1);
1142                 ehca_gen_dbg("doorbell for %x wqes", bad_wqe_cnt);
1143         }
1144
1145         if (statetrans == IB_QPST_RESET2INIT ||
1146             statetrans == IB_QPST_INIT2INIT) {
1147                 mqpcb->qp_enable = 1;
1148                 mqpcb->qp_state = EHCA_QPS_INIT;
1149                 update_mask = 0;
1150                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
1151
1152                 h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1153                                          my_qp->ipz_qp_handle,
1154                                          &my_qp->pf,
1155                                          update_mask,
1156                                          mqpcb,
1157                                          my_qp->galpas.kernel);
1158
1159                 if (h_ret != H_SUCCESS) {
1160                         ret = ehca2ib_return_code(h_ret);
1161                         ehca_err(ibqp->device, "ENABLE in context of "
1162                                  "RESET_2_INIT failed! Maybe you didn't get "
1163                                  "a LID h_ret=%lx ehca_qp=%p qp_num=%x",
1164                                  h_ret, my_qp, ibqp->qp_num);
1165                         goto modify_qp_exit2;
1166                 }
1167         }
1168
1169         if (statetrans == IB_QPST_ANY2RESET) {
1170                 ipz_qeit_reset(&my_qp->ipz_rqueue);
1171                 ipz_qeit_reset(&my_qp->ipz_squeue);
1172         }
1173
1174         if (attr_mask & IB_QP_QKEY)
1175                 my_qp->qkey = attr->qkey;
1176
1177 modify_qp_exit2:
1178         if (squeue_locked) { /* this means: sqe -> rts */
1179                 spin_unlock_irqrestore(&my_qp->spinlock_s, spl_flags);
1180                 my_qp->sqerr_purgeflag = 1;
1181         }
1182
1183 modify_qp_exit1:
1184         ehca_free_fw_ctrlblock(mqpcb);
1185
1186         return ret;
1187 }
1188
1189 int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
1190                    struct ib_udata *udata)
1191 {
1192         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1193         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
1194                                              ib_pd);
1195         u32 cur_pid = current->tgid;
1196
1197         if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
1198             my_pd->ownpid != cur_pid) {
1199                 ehca_err(ibqp->pd->device, "Invalid caller pid=%x ownpid=%x",
1200                          cur_pid, my_pd->ownpid);
1201                 return -EINVAL;
1202         }
1203
1204         return internal_modify_qp(ibqp, attr, attr_mask, 0);
1205 }
1206
1207 int ehca_query_qp(struct ib_qp *qp,
1208                   struct ib_qp_attr *qp_attr,
1209                   int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
1210 {
1211         struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
1212         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
1213                                              ib_pd);
1214         struct ehca_shca *shca = container_of(qp->device, struct ehca_shca,
1215                                               ib_device);
1216         struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
1217         struct hcp_modify_qp_control_block *qpcb;
1218         u32 cur_pid = current->tgid;
1219         int cnt, ret = 0;
1220         u64 h_ret;
1221
1222         if (my_pd->ib_pd.uobject  && my_pd->ib_pd.uobject->context  &&
1223             my_pd->ownpid != cur_pid) {
1224                 ehca_err(qp->device, "Invalid caller pid=%x ownpid=%x",
1225                          cur_pid, my_pd->ownpid);
1226                 return -EINVAL;
1227         }
1228
1229         if (qp_attr_mask & QP_ATTR_QUERY_NOT_SUPPORTED) {
1230                 ehca_err(qp->device,"Invalid attribute mask "
1231                          "ehca_qp=%p qp_num=%x qp_attr_mask=%x ",
1232                          my_qp, qp->qp_num, qp_attr_mask);
1233                 return -EINVAL;
1234         }
1235
1236         qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1237         if (!qpcb) {
1238                 ehca_err(qp->device,"Out of memory for qpcb "
1239                          "ehca_qp=%p qp_num=%x", my_qp, qp->qp_num);
1240                 return -ENOMEM;
1241         }
1242
1243         h_ret = hipz_h_query_qp(adapter_handle,
1244                                 my_qp->ipz_qp_handle,
1245                                 &my_qp->pf,
1246                                 qpcb, my_qp->galpas.kernel);
1247
1248         if (h_ret != H_SUCCESS) {
1249                 ret = ehca2ib_return_code(h_ret);
1250                 ehca_err(qp->device,"hipz_h_query_qp() failed "
1251                          "ehca_qp=%p qp_num=%x h_ret=%lx",
1252                          my_qp, qp->qp_num, h_ret);
1253                 goto query_qp_exit1;
1254         }
1255
1256         qp_attr->cur_qp_state = ehca2ib_qp_state(qpcb->qp_state);
1257         qp_attr->qp_state = qp_attr->cur_qp_state;
1258
1259         if (qp_attr->cur_qp_state == -EINVAL) {
1260                 ret = -EINVAL;
1261                 ehca_err(qp->device,"Got invalid ehca_qp_state=%x "
1262                          "ehca_qp=%p qp_num=%x",
1263                          qpcb->qp_state, my_qp, qp->qp_num);
1264                 goto query_qp_exit1;
1265         }
1266
1267         if (qp_attr->qp_state == IB_QPS_SQD)
1268                 qp_attr->sq_draining = 1;
1269
1270         qp_attr->qkey = qpcb->qkey;
1271         qp_attr->path_mtu = qpcb->path_mtu;
1272         qp_attr->path_mig_state = qpcb->path_migration_state;
1273         qp_attr->rq_psn = qpcb->receive_psn;
1274         qp_attr->sq_psn = qpcb->send_psn;
1275         qp_attr->min_rnr_timer = qpcb->min_rnr_nak_timer_field;
1276         qp_attr->cap.max_send_wr = qpcb->max_nr_outst_send_wr-1;
1277         qp_attr->cap.max_recv_wr = qpcb->max_nr_outst_recv_wr-1;
1278         /* UD_AV CIRCUMVENTION */
1279         if (my_qp->qp_type == IB_QPT_UD) {
1280                 qp_attr->cap.max_send_sge =
1281                         qpcb->actual_nr_sges_in_sq_wqe - 2;
1282                 qp_attr->cap.max_recv_sge =
1283                         qpcb->actual_nr_sges_in_rq_wqe - 2;
1284         } else {
1285                 qp_attr->cap.max_send_sge =
1286                         qpcb->actual_nr_sges_in_sq_wqe;
1287                 qp_attr->cap.max_recv_sge =
1288                         qpcb->actual_nr_sges_in_rq_wqe;
1289         }
1290
1291         qp_attr->cap.max_inline_data = my_qp->sq_max_inline_data_size;
1292         qp_attr->dest_qp_num = qpcb->dest_qp_nr;
1293
1294         qp_attr->pkey_index =
1295                 EHCA_BMASK_GET(MQPCB_PRIM_P_KEY_IDX, qpcb->prim_p_key_idx);
1296
1297         qp_attr->port_num =
1298                 EHCA_BMASK_GET(MQPCB_PRIM_PHYS_PORT, qpcb->prim_phys_port);
1299
1300         qp_attr->timeout = qpcb->timeout;
1301         qp_attr->retry_cnt = qpcb->retry_count;
1302         qp_attr->rnr_retry = qpcb->rnr_retry_count;
1303
1304         qp_attr->alt_pkey_index =
1305                 EHCA_BMASK_GET(MQPCB_PRIM_P_KEY_IDX, qpcb->alt_p_key_idx);
1306
1307         qp_attr->alt_port_num = qpcb->alt_phys_port;
1308         qp_attr->alt_timeout = qpcb->timeout_al;
1309
1310         /* primary av */
1311         qp_attr->ah_attr.sl = qpcb->service_level;
1312
1313         if (qpcb->send_grh_flag) {
1314                 qp_attr->ah_attr.ah_flags = IB_AH_GRH;
1315         }
1316
1317         qp_attr->ah_attr.static_rate = qpcb->max_static_rate;
1318         qp_attr->ah_attr.dlid = qpcb->dlid;
1319         qp_attr->ah_attr.src_path_bits = qpcb->source_path_bits;
1320         qp_attr->ah_attr.port_num = qp_attr->port_num;
1321
1322         /* primary GRH */
1323         qp_attr->ah_attr.grh.traffic_class = qpcb->traffic_class;
1324         qp_attr->ah_attr.grh.hop_limit = qpcb->hop_limit;
1325         qp_attr->ah_attr.grh.sgid_index = qpcb->source_gid_idx;
1326         qp_attr->ah_attr.grh.flow_label = qpcb->flow_label;
1327
1328         for (cnt = 0; cnt < 16; cnt++)
1329                 qp_attr->ah_attr.grh.dgid.raw[cnt] =
1330                         qpcb->dest_gid.byte[cnt];
1331
1332         /* alternate AV */
1333         qp_attr->alt_ah_attr.sl = qpcb->service_level_al;
1334         if (qpcb->send_grh_flag_al) {
1335                 qp_attr->alt_ah_attr.ah_flags = IB_AH_GRH;
1336         }
1337
1338         qp_attr->alt_ah_attr.static_rate = qpcb->max_static_rate_al;
1339         qp_attr->alt_ah_attr.dlid = qpcb->dlid_al;
1340         qp_attr->alt_ah_attr.src_path_bits = qpcb->source_path_bits_al;
1341
1342         /* alternate GRH */
1343         qp_attr->alt_ah_attr.grh.traffic_class = qpcb->traffic_class_al;
1344         qp_attr->alt_ah_attr.grh.hop_limit = qpcb->hop_limit_al;
1345         qp_attr->alt_ah_attr.grh.sgid_index = qpcb->source_gid_idx_al;
1346         qp_attr->alt_ah_attr.grh.flow_label = qpcb->flow_label_al;
1347
1348         for (cnt = 0; cnt < 16; cnt++)
1349                 qp_attr->alt_ah_attr.grh.dgid.raw[cnt] =
1350                         qpcb->dest_gid_al.byte[cnt];
1351
1352         /* return init attributes given in ehca_create_qp */
1353         if (qp_init_attr)
1354                 *qp_init_attr = my_qp->init_attr;
1355
1356         if (ehca_debug_level)
1357                 ehca_dmp(qpcb, 4*70, "qp_num=%x", qp->qp_num);
1358
1359 query_qp_exit1:
1360         ehca_free_fw_ctrlblock(qpcb);
1361
1362         return ret;
1363 }
1364
1365 int ehca_destroy_qp(struct ib_qp *ibqp)
1366 {
1367         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1368         struct ehca_shca *shca = container_of(ibqp->device, struct ehca_shca,
1369                                               ib_device);
1370         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
1371                                              ib_pd);
1372         u32 cur_pid = current->tgid;
1373         u32 qp_num = ibqp->qp_num;
1374         int ret;
1375         u64 h_ret;
1376         u8 port_num;
1377         enum ib_qp_type qp_type;
1378         unsigned long flags;
1379
1380         if (ibqp->uobject) {
1381                 if (my_qp->mm_count_galpa ||
1382                     my_qp->mm_count_rqueue || my_qp->mm_count_squeue) {
1383                         ehca_err(ibqp->device, "Resources still referenced in "
1384                                  "user space qp_num=%x", ibqp->qp_num);
1385                         return -EINVAL;
1386                 }
1387                 if (my_pd->ownpid != cur_pid) {
1388                         ehca_err(ibqp->device, "Invalid caller pid=%x ownpid=%x",
1389                                  cur_pid, my_pd->ownpid);
1390                         return -EINVAL;
1391                 }
1392         }
1393
1394         if (my_qp->send_cq) {
1395                 ret = ehca_cq_unassign_qp(my_qp->send_cq,
1396                                               my_qp->real_qp_num);
1397                 if (ret) {
1398                         ehca_err(ibqp->device, "Couldn't unassign qp from "
1399                                  "send_cq ret=%x qp_num=%x cq_num=%x", ret,
1400                                  my_qp->ib_qp.qp_num, my_qp->send_cq->cq_number);
1401                         return ret;
1402                 }
1403         }
1404
1405         spin_lock_irqsave(&ehca_qp_idr_lock, flags);
1406         idr_remove(&ehca_qp_idr, my_qp->token);
1407         spin_unlock_irqrestore(&ehca_qp_idr_lock, flags);
1408
1409         h_ret = hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
1410         if (h_ret != H_SUCCESS) {
1411                 ehca_err(ibqp->device, "hipz_h_destroy_qp() failed rc=%lx "
1412                          "ehca_qp=%p qp_num=%x", h_ret, my_qp, qp_num);
1413                 return ehca2ib_return_code(h_ret);
1414         }
1415
1416         port_num = my_qp->init_attr.port_num;
1417         qp_type  = my_qp->init_attr.qp_type;
1418
1419         /* no support for IB_QPT_SMI yet */
1420         if (qp_type == IB_QPT_GSI) {
1421                 struct ib_event event;
1422                 ehca_info(ibqp->device, "device %s: port %x is inactive.",
1423                           shca->ib_device.name, port_num);
1424                 event.device = &shca->ib_device;
1425                 event.event = IB_EVENT_PORT_ERR;
1426                 event.element.port_num = port_num;
1427                 shca->sport[port_num - 1].port_state = IB_PORT_DOWN;
1428                 ib_dispatch_event(&event);
1429         }
1430
1431         ipz_queue_dtor(&my_qp->ipz_rqueue);
1432         ipz_queue_dtor(&my_qp->ipz_squeue);
1433         kmem_cache_free(qp_cache, my_qp);
1434         return 0;
1435 }
1436
1437 int ehca_init_qp_cache(void)
1438 {
1439         qp_cache = kmem_cache_create("ehca_cache_qp",
1440                                      sizeof(struct ehca_qp), 0,
1441                                      SLAB_HWCACHE_ALIGN,
1442                                      NULL, NULL);
1443         if (!qp_cache)
1444                 return -ENOMEM;
1445         return 0;
1446 }
1447
1448 void ehca_cleanup_qp_cache(void)
1449 {
1450         if (qp_cache)
1451                 kmem_cache_destroy(qp_cache);
1452 }