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: Joachim Fenkes <fenkes@de.ibm.com>
   7  *           Stefan Roscher <stefan.roscher@de.ibm.com>
   8  *           Waleri Fomin <fomin@de.ibm.com>
   9  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
  10  *           Reinhard Ernst <rernst@de.ibm.com>
  11  *           Heiko J Schick <schickhj@de.ibm.com>
  12  *
  13  *  Copyright (c) 2005 IBM Corporation
  14  *
  15  *  All rights reserved.
  16  *
  17  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  18  *  BSD.
  19  *
  20  * OpenIB BSD License
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions are met:
  24  *
  25  * Redistributions of source code must retain the above copyright notice, this
  26  * list of conditions and the following disclaimer.
  27  *
  28  * Redistributions in binary form must reproduce the above copyright notice,
  29  * this list of conditions and the following disclaimer in the documentation
  30  * and/or other materials
  31  * provided with the distribution.
  32  *
  33  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  34  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  35  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  36  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  37  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  38  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  39  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  40  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  41  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  42  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  43  * POSSIBILITY OF SUCH DAMAGE.
  44  */
  45
  46
  47 #include <asm/current.h>
  48
  49 #include "ehca_classes.h"
  50 #include "ehca_tools.h"
  51 #include "ehca_qes.h"
  52 #include "ehca_iverbs.h"
  53 #include "hcp_if.h"
  54 #include "hipz_fns.h"
  55
  56 static struct kmem_cache *qp_cache;
  57
  58 /*
  59  * attributes not supported by query qp
  60  */
  61 #define QP_ATTR_QUERY_NOT_SUPPORTED (IB_QP_MAX_DEST_RD_ATOMIC | \
  62                                      IB_QP_MAX_QP_RD_ATOMIC   | \
  63                                      IB_QP_ACCESS_FLAGS       | \
  64                                      IB_QP_EN_SQD_ASYNC_NOTIFY)
  65
  66 /*
  67  * ehca (internal) qp state values
  68  */
  69 enum ehca_qp_state {
  70         EHCA_QPS_RESET = 1,
  71         EHCA_QPS_INIT = 2,
  72         EHCA_QPS_RTR = 3,
  73         EHCA_QPS_RTS = 5,
  74         EHCA_QPS_SQD = 6,
  75         EHCA_QPS_SQE = 8,
  76         EHCA_QPS_ERR = 128
  77 };
  78
  79 /*
  80  * qp state transitions as defined by IB Arch Rel 1.1 page 431
  81  */
  82 enum ib_qp_statetrans {
  83         IB_QPST_ANY2RESET,
  84         IB_QPST_ANY2ERR,
  85         IB_QPST_RESET2INIT,
  86         IB_QPST_INIT2RTR,
  87         IB_QPST_INIT2INIT,
  88         IB_QPST_RTR2RTS,
  89         IB_QPST_RTS2SQD,
  90         IB_QPST_RTS2RTS,
  91         IB_QPST_SQD2RTS,
  92         IB_QPST_SQE2RTS,
  93         IB_QPST_SQD2SQD,
  94         IB_QPST_MAX     /* nr of transitions, this must be last!!! */
  95 };
  96
  97 /*
  98  * ib2ehca_qp_state maps IB to ehca qp_state
  99  * returns ehca qp state corresponding to given ib qp state
 100  */
 101 static inline enum ehca_qp_state ib2ehca_qp_state(enum ib_qp_state ib_qp_state)
 102 {
 103         switch (ib_qp_state) {
 104         case IB_QPS_RESET:
 105                 return EHCA_QPS_RESET;
 106         case IB_QPS_INIT:
 107                 return EHCA_QPS_INIT;
 108         case IB_QPS_RTR:
 109                 return EHCA_QPS_RTR;
 110         case IB_QPS_RTS:
 111                 return EHCA_QPS_RTS;
 112         case IB_QPS_SQD:
 113                 return EHCA_QPS_SQD;
 114         case IB_QPS_SQE:
 115                 return EHCA_QPS_SQE;
 116         case IB_QPS_ERR:
 117                 return EHCA_QPS_ERR;
 118         default:
 119                 ehca_gen_err("invalid ib_qp_state=%x", ib_qp_state);
 120                 return -EINVAL;
 121         }
 122 }
 123
 124 /*
 125  * ehca2ib_qp_state maps ehca to IB qp_state
 126  * returns ib qp state corresponding to given ehca qp state
 127  */
 128 static inline enum ib_qp_state ehca2ib_qp_state(enum ehca_qp_state
 129                                                 ehca_qp_state)
 130 {
 131         switch (ehca_qp_state) {
 132         case EHCA_QPS_RESET:
 133                 return IB_QPS_RESET;
 134         case EHCA_QPS_INIT:
 135                 return IB_QPS_INIT;
 136         case EHCA_QPS_RTR:
 137                 return IB_QPS_RTR;
 138         case EHCA_QPS_RTS:
 139                 return IB_QPS_RTS;
 140         case EHCA_QPS_SQD:
 141                 return IB_QPS_SQD;
 142         case EHCA_QPS_SQE:
 143                 return IB_QPS_SQE;
 144         case EHCA_QPS_ERR:
 145                 return IB_QPS_ERR;
 146         default:
 147                 ehca_gen_err("invalid ehca_qp_state=%x", ehca_qp_state);
 148                 return -EINVAL;
 149         }
 150 }
 151
 152 /*
 153  * ehca_qp_type used as index for req_attr and opt_attr of
 154  * struct ehca_modqp_statetrans
 155  */
 156 enum ehca_qp_type {
 157         QPT_RC = 0,
 158         QPT_UC = 1,
 159         QPT_UD = 2,
 160         QPT_SQP = 3,
 161         QPT_MAX
 162 };
 163
 164 /*
 165  * ib2ehcaqptype maps Ib to ehca qp_type
 166  * returns ehca qp type corresponding to ib qp type
 167  */
 168 static inline enum ehca_qp_type ib2ehcaqptype(enum ib_qp_type ibqptype)
 169 {
 170         switch (ibqptype) {
 171         case IB_QPT_SMI:
 172         case IB_QPT_GSI:
 173                 return QPT_SQP;
 174         case IB_QPT_RC:
 175                 return QPT_RC;
 176         case IB_QPT_UC:
 177                 return QPT_UC;
 178         case IB_QPT_UD:
 179                 return QPT_UD;
 180         default:
 181                 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
 182                 return -EINVAL;
 183         }
 184 }
 185
 186 static inline enum ib_qp_statetrans get_modqp_statetrans(int ib_fromstate,
 187                                                          int ib_tostate)
 188 {
 189         int index = -EINVAL;
 190         switch (ib_tostate) {
 191         case IB_QPS_RESET:
 192                 index = IB_QPST_ANY2RESET;
 193                 break;
 194         case IB_QPS_INIT:
 195                 switch (ib_fromstate) {
 196                 case IB_QPS_RESET:
 197                         index = IB_QPST_RESET2INIT;
 198                         break;
 199                 case IB_QPS_INIT:
 200                         index = IB_QPST_INIT2INIT;
 201                         break;
 202                 }
 203                 break;
 204         case IB_QPS_RTR:
 205                 if (ib_fromstate == IB_QPS_INIT)
 206                         index = IB_QPST_INIT2RTR;
 207                 break;
 208         case IB_QPS_RTS:
 209                 switch (ib_fromstate) {
 210                 case IB_QPS_RTR:
 211                         index = IB_QPST_RTR2RTS;
 212                         break;
 213                 case IB_QPS_RTS:
 214                         index = IB_QPST_RTS2RTS;
 215                         break;
 216                 case IB_QPS_SQD:
 217                         index = IB_QPST_SQD2RTS;
 218                         break;
 219                 case IB_QPS_SQE:
 220                         index = IB_QPST_SQE2RTS;
 221                         break;
 222                 }
 223                 break;
 224         case IB_QPS_SQD:
 225                 if (ib_fromstate == IB_QPS_RTS)
 226                         index = IB_QPST_RTS2SQD;
 227                 break;
 228         case IB_QPS_SQE:
 229                 break;
 230         case IB_QPS_ERR:
 231                 index = IB_QPST_ANY2ERR;
 232                 break;
 233         default:
 234                 break;
 235         }
 236         return index;
 237 }
 238
 239 /*
 240  * ibqptype2servicetype returns hcp service type corresponding to given
 241  * ib qp type used by create_qp()
 242  */
 243 static inline int ibqptype2servicetype(enum ib_qp_type ibqptype)
 244 {
 245         switch (ibqptype) {
 246         case IB_QPT_SMI:
 247         case IB_QPT_GSI:
 248                 return ST_UD;
 249         case IB_QPT_RC:
 250                 return ST_RC;
 251         case IB_QPT_UC:
 252                 return ST_UC;
 253         case IB_QPT_UD:
 254                 return ST_UD;
 255         case IB_QPT_RAW_IPV6:
 256                 return -EINVAL;
 257         case IB_QPT_RAW_ETY:
 258                 return -EINVAL;
 259         default:
 260                 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
 261                 return -EINVAL;
 262         }
 263 }
 264
 265 /*
 266  * init userspace queue info from ipz_queue data
 267  */
 268 static inline void queue2resp(struct ipzu_queue_resp *resp,
 269                               struct ipz_queue *queue)
 270 {
 271         resp->qe_size = queue->qe_size;
 272         resp->act_nr_of_sg = queue->act_nr_of_sg;
 273         resp->queue_length = queue->queue_length;
 274         resp->pagesize = queue->pagesize;
 275         resp->toggle_state = queue->toggle_state;
 276         resp->offset = queue->offset;
 277 }
 278
 279 /*
 280  * init_qp_queue initializes/constructs r/squeue and registers queue pages.
 281  */
 282 static inline int init_qp_queue(struct ehca_shca *shca,
 283                                 struct ehca_pd *pd,
 284                                 struct ehca_qp *my_qp,
 285                                 struct ipz_queue *queue,
 286                                 int q_type,
 287                                 u64 expected_hret,
 288                                 struct ehca_alloc_queue_parms *parms,
 289                                 int wqe_size)
 290 {
 291         int ret, cnt, ipz_rc, nr_q_pages;
 292         void *vpage;
 293         u64 rpage, h_ret;
 294         struct ib_device *ib_dev = &shca->ib_device;
 295         struct ipz_adapter_handle ipz_hca_handle = shca->ipz_hca_handle;
 296
 297         if (!parms->queue_size)
 298                 return 0;
 299
 300         if (parms->is_small) {
 301                 nr_q_pages = 1;
 302                 ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
 303                                         128 << parms->page_size,
 304                                         wqe_size, parms->act_nr_sges, 1);
 305         } else {
 306                 nr_q_pages = parms->queue_size;
 307                 ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
 308                                         EHCA_PAGESIZE, wqe_size,
 309                                         parms->act_nr_sges, 0);
 310         }
 311
 312         if (!ipz_rc) {
 313                 ehca_err(ib_dev, "Cannot allocate page for queue. ipz_rc=%x",
 314                          ipz_rc);
 315                 return -EBUSY;
 316         }
 317
 318         /* register queue pages */
 319         for (cnt = 0; cnt < nr_q_pages; cnt++) {
 320                 vpage = ipz_qpageit_get_inc(queue);
 321                 if (!vpage) {
 322                         ehca_err(ib_dev, "ipz_qpageit_get_inc() "
 323                                  "failed p_vpage= %p", vpage);
 324                         ret = -EINVAL;
 325                         goto init_qp_queue1;
 326                 }
 327                 rpage = virt_to_abs(vpage);
 328
 329                 h_ret = hipz_h_register_rpage_qp(ipz_hca_handle,
 330                                                  my_qp->ipz_qp_handle,
 331                                                  NULL, 0, q_type,
 332                                                  rpage, parms->is_small ? 0 : 1,
 333                                                  my_qp->galpas.kernel);
 334                 if (cnt == (nr_q_pages - 1)) {  /* last page! */
 335                         if (h_ret != expected_hret) {
 336                                 ehca_err(ib_dev, "hipz_qp_register_rpage() "
 337                                          "h_ret= %lx ", h_ret);
 338                                 ret = ehca2ib_return_code(h_ret);
 339                                 goto init_qp_queue1;
 340                         }
 341                         vpage = ipz_qpageit_get_inc(&my_qp->ipz_rqueue);
 342                         if (vpage) {
 343                                 ehca_err(ib_dev, "ipz_qpageit_get_inc() "
 344                                          "should not succeed vpage=%p", vpage);
 345                                 ret = -EINVAL;
 346                                 goto init_qp_queue1;
 347                         }
 348                 } else {
 349                         if (h_ret != H_PAGE_REGISTERED) {
 350                                 ehca_err(ib_dev, "hipz_qp_register_rpage() "
 351                                          "h_ret= %lx ", h_ret);
 352                                 ret = ehca2ib_return_code(h_ret);
 353                                 goto init_qp_queue1;
 354                         }
 355                 }
 356         }
 357
 358         ipz_qeit_reset(queue);
 359
 360         return 0;
 361
 362 init_qp_queue1:
 363         ipz_queue_dtor(pd, queue);
 364         return ret;
 365 }
 366
 367 static inline int ehca_calc_wqe_size(int act_nr_sge, int is_llqp)
 368 {
 369         if (is_llqp)
 370                 return 128 << act_nr_sge;
 371         else
 372                 return offsetof(struct ehca_wqe,
 373                                 u.nud.sg_list[act_nr_sge]);
 374 }
 375
 376 static void ehca_determine_small_queue(struct ehca_alloc_queue_parms *queue,
 377                                        int req_nr_sge, int is_llqp)
 378 {
 379         u32 wqe_size, q_size;
 380         int act_nr_sge = req_nr_sge;
 381
 382         if (!is_llqp)
 383                 /* round up #SGEs so WQE size is a power of 2 */
 384                 for (act_nr_sge = 4; act_nr_sge <= 252;
 385                      act_nr_sge = 4 + 2 * act_nr_sge)
 386                         if (act_nr_sge >= req_nr_sge)
 387                                 break;
 388
 389         wqe_size = ehca_calc_wqe_size(act_nr_sge, is_llqp);
 390         q_size = wqe_size * (queue->max_wr + 1);
 391
 392         if (q_size <= 512)
 393                 queue->page_size = 2;
 394         else if (q_size <= 1024)
 395                 queue->page_size = 3;
 396         else
 397                 queue->page_size = 0;
 398
 399         queue->is_small = (queue->page_size != 0);
 400 }
 401
 402 /*
 403  * Create an ib_qp struct that is either a QP or an SRQ, depending on
 404  * the value of the is_srq parameter. If init_attr and srq_init_attr share
 405  * fields, the field out of init_attr is used.
 406  */
 407 static struct ehca_qp *internal_create_qp(
 408         struct ib_pd *pd,
 409         struct ib_qp_init_attr *init_attr,
 410         struct ib_srq_init_attr *srq_init_attr,
 411         struct ib_udata *udata, int is_srq)
 412 {
 413         struct ehca_qp *my_qp;
 414         struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
 415         struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
 416                                               ib_device);
 417         struct ib_ucontext *context = NULL;
 418         u64 h_ret;
 419         int is_llqp = 0, has_srq = 0;
 420         int qp_type, max_send_sge, max_recv_sge, ret;
 421
 422         /* h_call's out parameters */
 423         struct ehca_alloc_qp_parms parms;
 424         u32 swqe_size = 0, rwqe_size = 0, ib_qp_num;
 425         unsigned long flags;
 426
 427         memset(&parms, 0, sizeof(parms));
 428         qp_type = init_attr->qp_type;
 429
 430         if (init_attr->sq_sig_type != IB_SIGNAL_REQ_WR &&
 431                 init_attr->sq_sig_type != IB_SIGNAL_ALL_WR) {
 432                 ehca_err(pd->device, "init_attr->sg_sig_type=%x not allowed",
 433                          init_attr->sq_sig_type);
 434                 return ERR_PTR(-EINVAL);
 435         }
 436
 437         /* save LLQP info */
 438         if (qp_type & 0x80) {
 439                 is_llqp = 1;
 440                 parms.ext_type = EQPT_LLQP;
 441                 parms.ll_comp_flags = qp_type & LLQP_COMP_MASK;
 442         }
 443         qp_type &= 0x1F;
 444         init_attr->qp_type &= 0x1F;
 445
 446         /* handle SRQ base QPs */
 447         if (init_attr->srq) {
 448                 struct ehca_qp *my_srq =
 449                         container_of(init_attr->srq, struct ehca_qp, ib_srq);
 450
 451                 has_srq = 1;
 452                 parms.ext_type = EQPT_SRQBASE;
 453                 parms.srq_qpn = my_srq->real_qp_num;
 454                 parms.srq_token = my_srq->token;
 455         }
 456
 457         if (is_llqp && has_srq) {
 458                 ehca_err(pd->device, "LLQPs can't have an SRQ");
 459                 return ERR_PTR(-EINVAL);
 460         }
 461
 462         /* handle SRQs */
 463         if (is_srq) {
 464                 parms.ext_type = EQPT_SRQ;
 465                 parms.srq_limit = srq_init_attr->attr.srq_limit;
 466                 if (init_attr->cap.max_recv_sge > 3) {
 467                         ehca_err(pd->device, "no more than three SGEs "
 468                                  "supported for SRQ  pd=%p  max_sge=%x",
 469                                  pd, init_attr->cap.max_recv_sge);
 470                         return ERR_PTR(-EINVAL);
 471                 }
 472         }
 473
 474         /* check QP type */
 475         if (qp_type != IB_QPT_UD &&
 476             qp_type != IB_QPT_UC &&
 477             qp_type != IB_QPT_RC &&
 478             qp_type != IB_QPT_SMI &&
 479             qp_type != IB_QPT_GSI) {
 480                 ehca_err(pd->device, "wrong QP Type=%x", qp_type);
 481                 return ERR_PTR(-EINVAL);
 482         }
 483
 484         if (is_llqp) {
 485                 switch (qp_type) {
 486                 case IB_QPT_RC:
 487                         if ((init_attr->cap.max_send_wr > 255) ||
 488                             (init_attr->cap.max_recv_wr > 255)) {
 489                                 ehca_err(pd->device,
 490                                          "Invalid Number of max_sq_wr=%x "
 491                                          "or max_rq_wr=%x for RC LLQP",
 492                                          init_attr->cap.max_send_wr,
 493                                          init_attr->cap.max_recv_wr);
 494                                 return ERR_PTR(-EINVAL);
 495                         }
 496                         break;
 497                 case IB_QPT_UD:
 498                         if (!EHCA_BMASK_GET(HCA_CAP_UD_LL_QP, shca->hca_cap)) {
 499                                 ehca_err(pd->device, "UD LLQP not supported "
 500                                          "by this adapter");
 501                                 return ERR_PTR(-ENOSYS);
 502                         }
 503                         if (!(init_attr->cap.max_send_sge <= 5
 504                             && init_attr->cap.max_send_sge >= 1
 505                             && init_attr->cap.max_recv_sge <= 5
 506                             && init_attr->cap.max_recv_sge >= 1)) {
 507                                 ehca_err(pd->device,
 508                                          "Invalid Number of max_send_sge=%x "
 509                                          "or max_recv_sge=%x for UD LLQP",
 510                                          init_attr->cap.max_send_sge,
 511                                          init_attr->cap.max_recv_sge);
 512                                 return ERR_PTR(-EINVAL);
 513                         } else if (init_attr->cap.max_send_wr > 255) {
 514                                 ehca_err(pd->device,
 515                                          "Invalid Number of "
 516                                          "ax_send_wr=%x for UD QP_TYPE=%x",
 517                                          init_attr->cap.max_send_wr, qp_type);
 518                                 return ERR_PTR(-EINVAL);
 519                         }
 520                         break;
 521                 default:
 522                         ehca_err(pd->device, "unsupported LL QP Type=%x",
 523                                  qp_type);
 524                         return ERR_PTR(-EINVAL);
 525                         break;
 526                 }
 527         }
 528
 529         if (pd->uobject && udata)
 530                 context = pd->uobject->context;
 531
 532         my_qp = kmem_cache_zalloc(qp_cache, GFP_KERNEL);
 533         if (!my_qp) {
 534                 ehca_err(pd->device, "pd=%p not enough memory to alloc qp", pd);
 535                 return ERR_PTR(-ENOMEM);
 536         }
 537
 538         spin_lock_init(&my_qp->spinlock_s);
 539         spin_lock_init(&my_qp->spinlock_r);
 540         my_qp->qp_type = qp_type;
 541         my_qp->ext_type = parms.ext_type;
 542
 543         if (init_attr->recv_cq)
 544                 my_qp->recv_cq =
 545                         container_of(init_attr->recv_cq, struct ehca_cq, ib_cq);
 546         if (init_attr->send_cq)
 547                 my_qp->send_cq =
 548                         container_of(init_attr->send_cq, struct ehca_cq, ib_cq);
 549
 550         do {
 551                 if (!idr_pre_get(&ehca_qp_idr, GFP_KERNEL)) {
 552                         ret = -ENOMEM;
 553                         ehca_err(pd->device, "Can't reserve idr resources.");
 554                         goto create_qp_exit0;
 555                 }
 556
 557                 write_lock_irqsave(&ehca_qp_idr_lock, flags);
 558                 ret = idr_get_new(&ehca_qp_idr, my_qp, &my_qp->token);
 559                 write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 560         } while (ret == -EAGAIN);
 561
 562         if (ret) {
 563                 ret = -ENOMEM;
 564                 ehca_err(pd->device, "Can't allocate new idr entry.");
 565                 goto create_qp_exit0;
 566         }
 567
 568         if (my_qp->token > 0x1FFFFFF) {
 569                 ret = -EINVAL;
 570                 ehca_err(pd->device, "Invalid number of qp");
 571                 goto create_qp_exit1;
 572         }
 573
 574         parms.servicetype = ibqptype2servicetype(qp_type);
 575         if (parms.servicetype < 0) {
 576                 ret = -EINVAL;
 577                 ehca_err(pd->device, "Invalid qp_type=%x", qp_type);
 578                 goto create_qp_exit1;
 579         }
 580
 581         if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR)
 582                 parms.sigtype = HCALL_SIGT_EVERY;
 583         else
 584                 parms.sigtype = HCALL_SIGT_BY_WQE;
 585
 586         /* UD_AV CIRCUMVENTION */
 587         max_send_sge = init_attr->cap.max_send_sge;
 588         max_recv_sge = init_attr->cap.max_recv_sge;
 589         if (parms.servicetype == ST_UD && !is_llqp) {
 590                 max_send_sge += 2;
 591                 max_recv_sge += 2;
 592         }
 593
 594         parms.token = my_qp->token;
 595         parms.eq_handle = shca->eq.ipz_eq_handle;
 596         parms.pd = my_pd->fw_pd;
 597         if (my_qp->send_cq)
 598                 parms.send_cq_handle = my_qp->send_cq->ipz_cq_handle;
 599         if (my_qp->recv_cq)
 600                 parms.recv_cq_handle = my_qp->recv_cq->ipz_cq_handle;
 601
 602         parms.squeue.max_wr = init_attr->cap.max_send_wr;
 603         parms.rqueue.max_wr = init_attr->cap.max_recv_wr;
 604         parms.squeue.max_sge = max_send_sge;
 605         parms.rqueue.max_sge = max_recv_sge;
 606
 607         if (EHCA_BMASK_GET(HCA_CAP_MINI_QP, shca->hca_cap)) {
 608                 if (HAS_SQ(my_qp))
 609                         ehca_determine_small_queue(
 610                                 &parms.squeue, max_send_sge, is_llqp);
 611                 if (HAS_RQ(my_qp))
 612                         ehca_determine_small_queue(
 613                                 &parms.rqueue, max_recv_sge, is_llqp);
 614                 parms.qp_storage =
 615                         (parms.squeue.is_small || parms.rqueue.is_small);
 616         }
 617
 618         h_ret = hipz_h_alloc_resource_qp(shca->ipz_hca_handle, &parms);
 619         if (h_ret != H_SUCCESS) {
 620                 ehca_err(pd->device, "h_alloc_resource_qp() failed h_ret=%lx",
 621                          h_ret);
 622                 ret = ehca2ib_return_code(h_ret);
 623                 goto create_qp_exit1;
 624         }
 625
 626         ib_qp_num = my_qp->real_qp_num = parms.real_qp_num;
 627         my_qp->ipz_qp_handle = parms.qp_handle;
 628         my_qp->galpas = parms.galpas;
 629
 630         swqe_size = ehca_calc_wqe_size(parms.squeue.act_nr_sges, is_llqp);
 631         rwqe_size = ehca_calc_wqe_size(parms.rqueue.act_nr_sges, is_llqp);
 632
 633         switch (qp_type) {
 634         case IB_QPT_RC:
 635                 if (is_llqp) {
 636                         parms.squeue.act_nr_sges = 1;
 637                         parms.rqueue.act_nr_sges = 1;
 638                 }
 639                 break;
 640         case IB_QPT_UD:
 641         case IB_QPT_GSI:
 642         case IB_QPT_SMI:
 643                 /* UD circumvention */
 644                 if (is_llqp) {
 645                         parms.squeue.act_nr_sges = 1;
 646                         parms.rqueue.act_nr_sges = 1;
 647                 } else {
 648                         parms.squeue.act_nr_sges -= 2;
 649                         parms.rqueue.act_nr_sges -= 2;
 650                 }
 651
 652                 if (IB_QPT_GSI == qp_type || IB_QPT_SMI == qp_type) {
 653                         parms.squeue.act_nr_wqes = init_attr->cap.max_send_wr;
 654                         parms.rqueue.act_nr_wqes = init_attr->cap.max_recv_wr;
 655                         parms.squeue.act_nr_sges = init_attr->cap.max_send_sge;
 656                         parms.rqueue.act_nr_sges = init_attr->cap.max_recv_sge;
 657                         ib_qp_num = (qp_type == IB_QPT_SMI) ? 0 : 1;
 658                 }
 659
 660                 break;
 661
 662         default:
 663                 break;
 664         }
 665
 666         /* initialize r/squeue and register queue pages */
 667         if (HAS_SQ(my_qp)) {
 668                 ret = init_qp_queue(
 669                         shca, my_pd, my_qp, &my_qp->ipz_squeue, 0,
 670                         HAS_RQ(my_qp) ? H_PAGE_REGISTERED : H_SUCCESS,
 671                         &parms.squeue, swqe_size);
 672                 if (ret) {
 673                         ehca_err(pd->device, "Couldn't initialize squeue "
 674                                  "and pages  ret=%x", ret);
 675                         goto create_qp_exit2;
 676                 }
 677         }
 678
 679         if (HAS_RQ(my_qp)) {
 680                 ret = init_qp_queue(
 681                         shca, my_pd, my_qp, &my_qp->ipz_rqueue, 1,
 682                         H_SUCCESS, &parms.rqueue, rwqe_size);
 683                 if (ret) {
 684                         ehca_err(pd->device, "Couldn't initialize rqueue "
 685                                  "and pages ret=%x", ret);
 686                         goto create_qp_exit3;
 687                 }
 688         }
 689
 690         if (is_srq) {
 691                 my_qp->ib_srq.pd = &my_pd->ib_pd;
 692                 my_qp->ib_srq.device = my_pd->ib_pd.device;
 693
 694                 my_qp->ib_srq.srq_context = init_attr->qp_context;
 695                 my_qp->ib_srq.event_handler = init_attr->event_handler;
 696         } else {
 697                 my_qp->ib_qp.qp_num = ib_qp_num;
 698                 my_qp->ib_qp.pd = &my_pd->ib_pd;
 699                 my_qp->ib_qp.device = my_pd->ib_pd.device;
 700
 701                 my_qp->ib_qp.recv_cq = init_attr->recv_cq;
 702                 my_qp->ib_qp.send_cq = init_attr->send_cq;
 703
 704                 my_qp->ib_qp.qp_type = qp_type;
 705                 my_qp->ib_qp.srq = init_attr->srq;
 706
 707                 my_qp->ib_qp.qp_context = init_attr->qp_context;
 708                 my_qp->ib_qp.event_handler = init_attr->event_handler;
 709         }
 710
 711         init_attr->cap.max_inline_data = 0; /* not supported yet */
 712         init_attr->cap.max_recv_sge = parms.rqueue.act_nr_sges;
 713         init_attr->cap.max_recv_wr = parms.rqueue.act_nr_wqes;
 714         init_attr->cap.max_send_sge = parms.squeue.act_nr_sges;
 715         init_attr->cap.max_send_wr = parms.squeue.act_nr_wqes;
 716         my_qp->init_attr = *init_attr;
 717
 718         /* NOTE: define_apq0() not supported yet */
 719         if (qp_type == IB_QPT_GSI) {
 720                 h_ret = ehca_define_sqp(shca, my_qp, init_attr);
 721                 if (h_ret != H_SUCCESS) {
 722                         ret = ehca2ib_return_code(h_ret);
 723                         goto create_qp_exit4;
 724                 }
 725         }
 726
 727         if (my_qp->send_cq) {
 728                 ret = ehca_cq_assign_qp(my_qp->send_cq, my_qp);
 729                 if (ret) {
 730                         ehca_err(pd->device,
 731                                  "Couldn't assign qp to send_cq ret=%x", ret);
 732                         goto create_qp_exit4;
 733                 }
 734         }
 735
 736         /* copy queues, galpa data to user space */
 737         if (context && udata) {
 738                 struct ehca_create_qp_resp resp;
 739                 memset(&resp, 0, sizeof(resp));
 740
 741                 resp.qp_num = my_qp->real_qp_num;
 742                 resp.token = my_qp->token;
 743                 resp.qp_type = my_qp->qp_type;
 744                 resp.ext_type = my_qp->ext_type;
 745                 resp.qkey = my_qp->qkey;
 746                 resp.real_qp_num = my_qp->real_qp_num;
 747
 748                 if (HAS_SQ(my_qp))
 749                         queue2resp(&resp.ipz_squeue, &my_qp->ipz_squeue);
 750                 if (HAS_RQ(my_qp))
 751                         queue2resp(&resp.ipz_rqueue, &my_qp->ipz_rqueue);
 752                 resp.fw_handle_ofs = (u32)
 753                         (my_qp->galpas.user.fw_handle & (PAGE_SIZE - 1));
 754
 755                 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
 756                         ehca_err(pd->device, "Copy to udata failed");
 757                         ret = -EINVAL;
 758                         goto create_qp_exit4;
 759                 }
 760         }
 761
 762         return my_qp;
 763
 764 create_qp_exit4:
 765         if (HAS_RQ(my_qp))
 766                 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
 767
 768 create_qp_exit3:
 769         if (HAS_SQ(my_qp))
 770                 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
 771
 772 create_qp_exit2:
 773         hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
 774
 775 create_qp_exit1:
 776         write_lock_irqsave(&ehca_qp_idr_lock, flags);
 777         idr_remove(&ehca_qp_idr, my_qp->token);
 778         write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 779
 780 create_qp_exit0:
 781         kmem_cache_free(qp_cache, my_qp);
 782         return ERR_PTR(ret);
 783 }
 784
 785 struct ib_qp *ehca_create_qp(struct ib_pd *pd,
 786                              struct ib_qp_init_attr *qp_init_attr,
 787                              struct ib_udata *udata)
 788 {
 789         struct ehca_qp *ret;
 790
 791         ret = internal_create_qp(pd, qp_init_attr, NULL, udata, 0);
 792         return IS_ERR(ret) ? (struct ib_qp *)ret : &ret->ib_qp;
 793 }
 794
 795 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
 796                                struct ib_uobject *uobject);
 797
 798 struct ib_srq *ehca_create_srq(struct ib_pd *pd,
 799                                struct ib_srq_init_attr *srq_init_attr,
 800                                struct ib_udata *udata)
 801 {
 802         struct ib_qp_init_attr qp_init_attr;
 803         struct ehca_qp *my_qp;
 804         struct ib_srq *ret;
 805         struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
 806                                               ib_device);
 807         struct hcp_modify_qp_control_block *mqpcb;
 808         u64 hret, update_mask;
 809
 810         /* For common attributes, internal_create_qp() takes its info
 811          * out of qp_init_attr, so copy all common attrs there.
 812          */
 813         memset(&qp_init_attr, 0, sizeof(qp_init_attr));
 814         qp_init_attr.event_handler = srq_init_attr->event_handler;
 815         qp_init_attr.qp_context = srq_init_attr->srq_context;
 816         qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
 817         qp_init_attr.qp_type = IB_QPT_RC;
 818         qp_init_attr.cap.max_recv_wr = srq_init_attr->attr.max_wr;
 819         qp_init_attr.cap.max_recv_sge = srq_init_attr->attr.max_sge;
 820
 821         my_qp = internal_create_qp(pd, &qp_init_attr, srq_init_attr, udata, 1);
 822         if (IS_ERR(my_qp))
 823                 return (struct ib_srq *)my_qp;
 824
 825         /* copy back return values */
 826         srq_init_attr->attr.max_wr = qp_init_attr.cap.max_recv_wr;
 827         srq_init_attr->attr.max_sge = qp_init_attr.cap.max_recv_sge;
 828
 829         /* drive SRQ into RTR state */
 830         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 831         if (!mqpcb) {
 832                 ehca_err(pd->device, "Could not get zeroed page for mqpcb "
 833                          "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
 834                 ret = ERR_PTR(-ENOMEM);
 835                 goto create_srq1;
 836         }
 837
 838         mqpcb->qp_state = EHCA_QPS_INIT;
 839         mqpcb->prim_phys_port = 1;
 840         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
 841         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
 842                                 my_qp->ipz_qp_handle,
 843                                 &my_qp->pf,
 844                                 update_mask,
 845                                 mqpcb, my_qp->galpas.kernel);
 846         if (hret != H_SUCCESS) {
 847                 ehca_err(pd->device, "Could not modify SRQ to INIT"
 848                          "ehca_qp=%p qp_num=%x hret=%lx",
 849                          my_qp, my_qp->real_qp_num, hret);
 850                 goto create_srq2;
 851         }
 852
 853         mqpcb->qp_enable = 1;
 854         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
 855         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
 856                                 my_qp->ipz_qp_handle,
 857                                 &my_qp->pf,
 858                                 update_mask,
 859                                 mqpcb, my_qp->galpas.kernel);
 860         if (hret != H_SUCCESS) {
 861                 ehca_err(pd->device, "Could not enable SRQ"
 862                          "ehca_qp=%p qp_num=%x hret=%lx",
 863                          my_qp, my_qp->real_qp_num, hret);
 864                 goto create_srq2;
 865         }
 866
 867         mqpcb->qp_state  = EHCA_QPS_RTR;
 868         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
 869         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
 870                                 my_qp->ipz_qp_handle,
 871                                 &my_qp->pf,
 872                                 update_mask,
 873                                 mqpcb, my_qp->galpas.kernel);
 874         if (hret != H_SUCCESS) {
 875                 ehca_err(pd->device, "Could not modify SRQ to RTR"
 876                          "ehca_qp=%p qp_num=%x hret=%lx",
 877                          my_qp, my_qp->real_qp_num, hret);
 878                 goto create_srq2;
 879         }
 880
 881         return &my_qp->ib_srq;
 882
 883 create_srq2:
 884         ret = ERR_PTR(ehca2ib_return_code(hret));
 885         ehca_free_fw_ctrlblock(mqpcb);
 886
 887 create_srq1:
 888         internal_destroy_qp(pd->device, my_qp, my_qp->ib_srq.uobject);
 889
 890         return ret;
 891 }
 892
 893 /*
 894  * prepare_sqe_rts called by internal_modify_qp() at trans sqe -> rts
 895  * set purge bit of bad wqe and subsequent wqes to avoid reentering sqe
 896  * returns total number of bad wqes in bad_wqe_cnt
 897  */
 898 static int prepare_sqe_rts(struct ehca_qp *my_qp, struct ehca_shca *shca,
 899                            int *bad_wqe_cnt)
 900 {
 901         u64 h_ret;
 902         struct ipz_queue *squeue;
 903         void *bad_send_wqe_p, *bad_send_wqe_v;
 904         u64 q_ofs;
 905         struct ehca_wqe *wqe;
 906         int qp_num = my_qp->ib_qp.qp_num;
 907
 908         /* get send wqe pointer */
 909         h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
 910                                            my_qp->ipz_qp_handle, &my_qp->pf,
 911                                            &bad_send_wqe_p, NULL, 2);
 912         if (h_ret != H_SUCCESS) {
 913                 ehca_err(&shca->ib_device, "hipz_h_disable_and_get_wqe() failed"
 914                          " ehca_qp=%p qp_num=%x h_ret=%lx",
 915                          my_qp, qp_num, h_ret);
 916                 return ehca2ib_return_code(h_ret);
 917         }
 918         bad_send_wqe_p = (void *)((u64)bad_send_wqe_p & (~(1L << 63)));
 919         ehca_dbg(&shca->ib_device, "qp_num=%x bad_send_wqe_p=%p",
 920                  qp_num, bad_send_wqe_p);
 921         /* convert wqe pointer to vadr */
 922         bad_send_wqe_v = abs_to_virt((u64)bad_send_wqe_p);
 923         if (ehca_debug_level)
 924                 ehca_dmp(bad_send_wqe_v, 32, "qp_num=%x bad_wqe", qp_num);
 925         squeue = &my_qp->ipz_squeue;
 926         if (ipz_queue_abs_to_offset(squeue, (u64)bad_send_wqe_p, &q_ofs)) {
 927                 ehca_err(&shca->ib_device, "failed to get wqe offset qp_num=%x"
 928                          " bad_send_wqe_p=%p", qp_num, bad_send_wqe_p);
 929                 return -EFAULT;
 930         }
 931
 932         /* loop sets wqe's purge bit */
 933         wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
 934         *bad_wqe_cnt = 0;
 935         while (wqe->optype != 0xff && wqe->wqef != 0xff) {
 936                 if (ehca_debug_level)
 937                         ehca_dmp(wqe, 32, "qp_num=%x wqe", qp_num);
 938                 wqe->nr_of_data_seg = 0; /* suppress data access */
 939                 wqe->wqef = WQEF_PURGE; /* WQE to be purged */
 940                 q_ofs = ipz_queue_advance_offset(squeue, q_ofs);
 941                 wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
 942                 *bad_wqe_cnt = (*bad_wqe_cnt)+1;
 943         }
 944         /*
 945          * bad wqe will be reprocessed and ignored when pol_cq() is called,
 946          *  i.e. nr of wqes with flush error status is one less
 947          */
 948         ehca_dbg(&shca->ib_device, "qp_num=%x flusherr_wqe_cnt=%x",
 949                  qp_num, (*bad_wqe_cnt)-1);
 950         wqe->wqef = 0;
 951
 952         return 0;
 953 }
 954
 955 /*
 956  * internal_modify_qp with circumvention to handle aqp0 properly
 957  * smi_reset2init indicates if this is an internal reset-to-init-call for
 958  * smi. This flag must always be zero if called from ehca_modify_qp()!
 959  * This internal func was intorduced to avoid recursion of ehca_modify_qp()!
 960  */
 961 static int internal_modify_qp(struct ib_qp *ibqp,
 962                               struct ib_qp_attr *attr,
 963                               int attr_mask, int smi_reset2init)
 964 {
 965         enum ib_qp_state qp_cur_state, qp_new_state;
 966         int cnt, qp_attr_idx, ret = 0;
 967         enum ib_qp_statetrans statetrans;
 968         struct hcp_modify_qp_control_block *mqpcb;
 969         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
 970         struct ehca_shca *shca =
 971                 container_of(ibqp->pd->device, struct ehca_shca, ib_device);
 972         u64 update_mask;
 973         u64 h_ret;
 974         int bad_wqe_cnt = 0;
 975         int squeue_locked = 0;
 976         unsigned long flags = 0;
 977
 978         /* do query_qp to obtain current attr values */
 979         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 980         if (!mqpcb) {
 981                 ehca_err(ibqp->device, "Could not get zeroed page for mqpcb "
 982                          "ehca_qp=%p qp_num=%x ", my_qp, ibqp->qp_num);
 983                 return -ENOMEM;
 984         }
 985
 986         h_ret = hipz_h_query_qp(shca->ipz_hca_handle,
 987                                 my_qp->ipz_qp_handle,
 988                                 &my_qp->pf,
 989                                 mqpcb, my_qp->galpas.kernel);
 990         if (h_ret != H_SUCCESS) {
 991                 ehca_err(ibqp->device, "hipz_h_query_qp() failed "
 992                          "ehca_qp=%p qp_num=%x h_ret=%lx",
 993                          my_qp, ibqp->qp_num, h_ret);
 994                 ret = ehca2ib_return_code(h_ret);
 995                 goto modify_qp_exit1;
 996         }
 997
 998         qp_cur_state = ehca2ib_qp_state(mqpcb->qp_state);
 999
1000         if (qp_cur_state == -EINVAL) {  /* invalid qp state */
1001                 ret = -EINVAL;
1002                 ehca_err(ibqp->device, "Invalid current ehca_qp_state=%x "
1003                          "ehca_qp=%p qp_num=%x",
1004                          mqpcb->qp_state, my_qp, ibqp->qp_num);
1005                 goto modify_qp_exit1;
1006         }
1007         /*
1008          * circumvention to set aqp0 initial state to init
1009          * as expected by IB spec
1010          */
1011         if (smi_reset2init == 0 &&
1012             ibqp->qp_type == IB_QPT_SMI &&
1013             qp_cur_state == IB_QPS_RESET &&
1014             (attr_mask & IB_QP_STATE) &&
1015             attr->qp_state == IB_QPS_INIT) { /* RESET -> INIT */
1016                 struct ib_qp_attr smiqp_attr = {
1017                         .qp_state = IB_QPS_INIT,
1018                         .port_num = my_qp->init_attr.port_num,
1019                         .pkey_index = 0,
1020                         .qkey = 0
1021                 };
1022                 int smiqp_attr_mask = IB_QP_STATE | IB_QP_PORT |
1023                         IB_QP_PKEY_INDEX | IB_QP_QKEY;
1024                 int smirc = internal_modify_qp(
1025                         ibqp, &smiqp_attr, smiqp_attr_mask, 1);
1026                 if (smirc) {
1027                         ehca_err(ibqp->device, "SMI RESET -> INIT failed. "
1028                                  "ehca_modify_qp() rc=%x", smirc);
1029                         ret = H_PARAMETER;
1030                         goto modify_qp_exit1;
1031                 }
1032                 qp_cur_state = IB_QPS_INIT;
1033                 ehca_dbg(ibqp->device, "SMI RESET -> INIT succeeded");
1034         }
1035         /* is transmitted current state  equal to "real" current state */
1036         if ((attr_mask & IB_QP_CUR_STATE) &&
1037             qp_cur_state != attr->cur_qp_state) {
1038                 ret = -EINVAL;
1039                 ehca_err(ibqp->device,
1040                          "Invalid IB_QP_CUR_STATE attr->curr_qp_state=%x <>"
1041                          " actual cur_qp_state=%x. ehca_qp=%p qp_num=%x",
1042                          attr->cur_qp_state, qp_cur_state, my_qp, ibqp->qp_num);
1043                 goto modify_qp_exit1;
1044         }
1045
1046         ehca_dbg(ibqp->device, "ehca_qp=%p qp_num=%x current qp_state=%x "
1047                  "new qp_state=%x attribute_mask=%x",
1048                  my_qp, ibqp->qp_num, qp_cur_state, attr->qp_state, attr_mask);
1049
1050         qp_new_state = attr_mask & IB_QP_STATE ? attr->qp_state : qp_cur_state;
1051         if (!smi_reset2init &&
1052             !ib_modify_qp_is_ok(qp_cur_state, qp_new_state, ibqp->qp_type,
1053                                 attr_mask)) {
1054                 ret = -EINVAL;
1055                 ehca_err(ibqp->device,
1056                          "Invalid qp transition new_state=%x cur_state=%x "
1057                          "ehca_qp=%p qp_num=%x attr_mask=%x", qp_new_state,
1058                          qp_cur_state, my_qp, ibqp->qp_num, attr_mask);
1059                 goto modify_qp_exit1;
1060         }
1061
1062         mqpcb->qp_state = ib2ehca_qp_state(qp_new_state);
1063         if (mqpcb->qp_state)
1064                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1065         else {
1066                 ret = -EINVAL;
1067                 ehca_err(ibqp->device, "Invalid new qp state=%x "
1068                          "ehca_qp=%p qp_num=%x",
1069                          qp_new_state, my_qp, ibqp->qp_num);
1070                 goto modify_qp_exit1;
1071         }
1072
1073         /* retrieve state transition struct to get req and opt attrs */
1074         statetrans = get_modqp_statetrans(qp_cur_state, qp_new_state);
1075         if (statetrans < 0) {
1076                 ret = -EINVAL;
1077                 ehca_err(ibqp->device, "<INVALID STATE CHANGE> qp_cur_state=%x "
1078                          "new_qp_state=%x State_xsition=%x ehca_qp=%p "
1079                          "qp_num=%x", qp_cur_state, qp_new_state,
1080                          statetrans, my_qp, ibqp->qp_num);
1081                 goto modify_qp_exit1;
1082         }
1083
1084         qp_attr_idx = ib2ehcaqptype(ibqp->qp_type);
1085
1086         if (qp_attr_idx < 0) {
1087                 ret = qp_attr_idx;
1088                 ehca_err(ibqp->device,
1089                          "Invalid QP type=%x ehca_qp=%p qp_num=%x",
1090                          ibqp->qp_type, my_qp, ibqp->qp_num);
1091                 goto modify_qp_exit1;
1092         }
1093
1094         ehca_dbg(ibqp->device,
1095                  "ehca_qp=%p qp_num=%x <VALID STATE CHANGE> qp_state_xsit=%x",
1096                  my_qp, ibqp->qp_num, statetrans);
1097
1098         /* eHCA2 rev2 and higher require the SEND_GRH_FLAG to be set
1099          * in non-LL UD QPs.
1100          */
1101         if ((my_qp->qp_type == IB_QPT_UD) &&
1102             (my_qp->ext_type != EQPT_LLQP) &&
1103             (statetrans == IB_QPST_INIT2RTR) &&
1104             (shca->hw_level >= 0x22)) {
1105                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1106                 mqpcb->send_grh_flag = 1;
1107         }
1108
1109         /* sqe -> rts: set purge bit of bad wqe before actual trans */
1110         if ((my_qp->qp_type == IB_QPT_UD ||
1111              my_qp->qp_type == IB_QPT_GSI ||
1112              my_qp->qp_type == IB_QPT_SMI) &&
1113             statetrans == IB_QPST_SQE2RTS) {
1114                 /* mark next free wqe if kernel */
1115                 if (!ibqp->uobject) {
1116                         struct ehca_wqe *wqe;
1117                         /* lock send queue */
1118                         spin_lock_irqsave(&my_qp->spinlock_s, flags);
1119                         squeue_locked = 1;
1120                         /* mark next free wqe */
1121                         wqe = (struct ehca_wqe *)
1122                                 ipz_qeit_get(&my_qp->ipz_squeue);
1123                         wqe->optype = wqe->wqef = 0xff;
1124                         ehca_dbg(ibqp->device, "qp_num=%x next_free_wqe=%p",
1125                                  ibqp->qp_num, wqe);
1126                 }
1127                 ret = prepare_sqe_rts(my_qp, shca, &bad_wqe_cnt);
1128                 if (ret) {
1129                         ehca_err(ibqp->device, "prepare_sqe_rts() failed "
1130                                  "ehca_qp=%p qp_num=%x ret=%x",
1131                                  my_qp, ibqp->qp_num, ret);
1132                         goto modify_qp_exit2;
1133                 }
1134         }
1135
1136         /*
1137          * enable RDMA_Atomic_Control if reset->init und reliable con
1138          * this is necessary since gen2 does not provide that flag,
1139          * but pHyp requires it
1140          */
1141         if (statetrans == IB_QPST_RESET2INIT &&
1142             (ibqp->qp_type == IB_QPT_RC || ibqp->qp_type == IB_QPT_UC)) {
1143                 mqpcb->rdma_atomic_ctrl = 3;
1144                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RDMA_ATOMIC_CTRL, 1);
1145         }
1146         /* circ. pHyp requires #RDMA/Atomic Resp Res for UC INIT -> RTR */
1147         if (statetrans == IB_QPST_INIT2RTR &&
1148             (ibqp->qp_type == IB_QPT_UC) &&
1149             !(attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)) {
1150                 mqpcb->rdma_nr_atomic_resp_res = 1; /* default to 1 */
1151                 update_mask |=
1152                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1153         }
1154
1155         if (attr_mask & IB_QP_PKEY_INDEX) {
1156                 mqpcb->prim_p_key_idx = attr->pkey_index;
1157                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_P_KEY_IDX, 1);
1158         }
1159         if (attr_mask & IB_QP_PORT) {
1160                 if (attr->port_num < 1 || attr->port_num > shca->num_ports) {
1161                         ret = -EINVAL;
1162                         ehca_err(ibqp->device, "Invalid port=%x. "
1163                                  "ehca_qp=%p qp_num=%x num_ports=%x",
1164                                  attr->port_num, my_qp, ibqp->qp_num,
1165                                  shca->num_ports);
1166                         goto modify_qp_exit2;
1167                 }
1168                 mqpcb->prim_phys_port = attr->port_num;
1169                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_PHYS_PORT, 1);
1170         }
1171         if (attr_mask & IB_QP_QKEY) {
1172                 mqpcb->qkey = attr->qkey;
1173                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_QKEY, 1);
1174         }
1175         if (attr_mask & IB_QP_AV) {
1176                 int ah_mult = ib_rate_to_mult(attr->ah_attr.static_rate);
1177                 int ehca_mult = ib_rate_to_mult(shca->sport[my_qp->
1178                                                 init_attr.port_num].rate);
1179
1180                 mqpcb->dlid = attr->ah_attr.dlid;
1181                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DLID, 1);
1182                 mqpcb->source_path_bits = attr->ah_attr.src_path_bits;
1183                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS, 1);
1184                 mqpcb->service_level = attr->ah_attr.sl;
1185                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL, 1);
1186
1187                 if (ah_mult < ehca_mult)
1188                         mqpcb->max_static_rate = (ah_mult > 0) ?
1189                         ((ehca_mult - 1) / ah_mult) : 0;
1190                 else
1191                         mqpcb->max_static_rate = 0;
1192                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE, 1);
1193
1194                 /*
1195                  * Always supply the GRH flag, even if it's zero, to give the
1196                  * hypervisor a clear "yes" or "no" instead of a "perhaps"
1197                  */
1198                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1199
1200                 /*
1201                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
1202                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1203                  */
1204                 if (attr->ah_attr.ah_flags == IB_AH_GRH) {
1205                         mqpcb->send_grh_flag = 1;
1206
1207                         mqpcb->source_gid_idx = attr->ah_attr.grh.sgid_index;
1208                         update_mask |=
1209                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX, 1);
1210
1211                         for (cnt = 0; cnt < 16; cnt++)
1212                                 mqpcb->dest_gid.byte[cnt] =
1213                                         attr->ah_attr.grh.dgid.raw[cnt];
1214
1215                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_GID, 1);
1216                         mqpcb->flow_label = attr->ah_attr.grh.flow_label;
1217                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL, 1);
1218                         mqpcb->hop_limit = attr->ah_attr.grh.hop_limit;
1219                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT, 1);
1220                         mqpcb->traffic_class = attr->ah_attr.grh.traffic_class;
1221                         update_mask |=
1222                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS, 1);
1223                 }
1224         }
1225
1226         if (attr_mask & IB_QP_PATH_MTU) {
1227                 mqpcb->path_mtu = attr->path_mtu;
1228                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PATH_MTU, 1);
1229         }
1230         if (attr_mask & IB_QP_TIMEOUT) {
1231                 mqpcb->timeout = attr->timeout;
1232                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT, 1);
1233         }
1234         if (attr_mask & IB_QP_RETRY_CNT) {
1235                 mqpcb->retry_count = attr->retry_cnt;
1236                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT, 1);
1237         }
1238         if (attr_mask & IB_QP_RNR_RETRY) {
1239                 mqpcb->rnr_retry_count = attr->rnr_retry;
1240                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT, 1);
1241         }
1242         if (attr_mask & IB_QP_RQ_PSN) {
1243                 mqpcb->receive_psn = attr->rq_psn;
1244                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RECEIVE_PSN, 1);
1245         }
1246         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1247                 mqpcb->rdma_nr_atomic_resp_res = attr->max_dest_rd_atomic < 3 ?
1248                         attr->max_dest_rd_atomic : 2;
1249                 update_mask |=
1250                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1251         }
1252         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1253                 mqpcb->rdma_atomic_outst_dest_qp = attr->max_rd_atomic < 3 ?
1254                         attr->max_rd_atomic : 2;
1255                 update_mask |=
1256                         EHCA_BMASK_SET
1257                         (MQPCB_MASK_RDMA_ATOMIC_OUTST_DEST_QP, 1);
1258         }
1259         if (attr_mask & IB_QP_ALT_PATH) {
1260                 int ah_mult = ib_rate_to_mult(attr->alt_ah_attr.static_rate);
1261                 int ehca_mult = ib_rate_to_mult(
1262                         shca->sport[my_qp->init_attr.port_num].rate);
1263
1264                 mqpcb->dlid_al = attr->alt_ah_attr.dlid;
1265                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DLID_AL, 1);
1266                 mqpcb->source_path_bits_al = attr->alt_ah_attr.src_path_bits;
1267                 update_mask |=
1268                         EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS_AL, 1);
1269                 mqpcb->service_level_al = attr->alt_ah_attr.sl;
1270                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL_AL, 1);
1271
1272                 if (ah_mult < ehca_mult)
1273                         mqpcb->max_static_rate = (ah_mult > 0) ?
1274                         ((ehca_mult - 1) / ah_mult) : 0;
1275                 else
1276                         mqpcb->max_static_rate_al = 0;
1277
1278                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE_AL, 1);
1279
1280                 /*
1281                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
1282                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1283                  */
1284                 if (attr->alt_ah_attr.ah_flags == IB_AH_GRH) {
1285                         mqpcb->send_grh_flag_al = 1 << 31;
1286                         update_mask |=
1287                                 EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG_AL, 1);
1288                         mqpcb->source_gid_idx_al =
1289                                 attr->alt_ah_attr.grh.sgid_index;
1290                         update_mask |=
1291                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX_AL, 1);
1292
1293                         for (cnt = 0; cnt < 16; cnt++)
1294                                 mqpcb->dest_gid_al.byte[cnt] =
1295                                         attr->alt_ah_attr.grh.dgid.raw[cnt];
1296
1297                         update_mask |=
1298                                 EHCA_BMASK_SET(MQPCB_MASK_DEST_GID_AL, 1);
1299                         mqpcb->flow_label_al = attr->alt_ah_attr.grh.flow_label;
1300                         update_mask |=
1301                                 EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL_AL, 1);
1302                         mqpcb->hop_limit_al = attr->alt_ah_attr.grh.hop_limit;
1303                         update_mask |=
1304                                 EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT_AL, 1);
1305                         mqpcb->traffic_class_al =
1306                                 attr->alt_ah_attr.grh.traffic_class;
1307                         update_mask |=
1308                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS_AL, 1);
1309                 }
1310         }
1311
1312         if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1313                 mqpcb->min_rnr_nak_timer_field = attr->min_rnr_timer;
1314                 update_mask |=
1315                         EHCA_BMASK_SET(MQPCB_MASK_MIN_RNR_NAK_TIMER_FIELD, 1);
1316         }
1317
1318         if (attr_mask & IB_QP_SQ_PSN) {
1319                 mqpcb->send_psn = attr->sq_psn;
1320                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_PSN, 1);
1321         }
1322
1323         if (attr_mask & IB_QP_DEST_QPN) {
1324                 mqpcb->dest_qp_nr = attr->dest_qp_num;
1325                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_QP_NR, 1);
1326         }
1327
1328         if (attr_mask & IB_QP_PATH_MIG_STATE) {
1329                 mqpcb->path_migration_state = attr->path_mig_state;
1330                 update_mask |=
1331                         EHCA_BMASK_SET(MQPCB_MASK_PATH_MIGRATION_STATE, 1);
1332         }
1333
1334         if (attr_mask & IB_QP_CAP) {
1335                 mqpcb->max_nr_outst_send_wr = attr->cap.max_send_wr+1;
1336                 update_mask |=
1337                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_SEND_WR, 1);
1338                 mqpcb->max_nr_outst_recv_wr = attr->cap.max_recv_wr+1;
1339                 update_mask |=
1340                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_RECV_WR, 1);
1341                 /* no support for max_send/recv_sge yet */
1342         }
1343
1344         if (ehca_debug_level)
1345                 ehca_dmp(mqpcb, 4*70, "qp_num=%x", ibqp->qp_num);
1346
1347         h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1348                                  my_qp->ipz_qp_handle,
1349                                  &my_qp->pf,
1350                                  update_mask,
1351                                  mqpcb, my_qp->galpas.kernel);
1352
1353         if (h_ret != H_SUCCESS) {
1354                 ret = ehca2ib_return_code(h_ret);
1355                 ehca_err(ibqp->device, "hipz_h_modify_qp() failed rc=%lx "
1356                          "ehca_qp=%p qp_num=%x", h_ret, my_qp, ibqp->qp_num);
1357                 goto modify_qp_exit2;
1358         }
1359
1360         if ((my_qp->qp_type == IB_QPT_UD ||
1361              my_qp->qp_type == IB_QPT_GSI ||
1362              my_qp->qp_type == IB_QPT_SMI) &&
1363             statetrans == IB_QPST_SQE2RTS) {
1364                 /* doorbell to reprocessing wqes */
1365                 iosync(); /* serialize GAL register access */
1366                 hipz_update_sqa(my_qp, bad_wqe_cnt-1);
1367                 ehca_gen_dbg("doorbell for %x wqes", bad_wqe_cnt);
1368         }
1369
1370         if (statetrans == IB_QPST_RESET2INIT ||
1371             statetrans == IB_QPST_INIT2INIT) {
1372                 mqpcb->qp_enable = 1;
1373                 mqpcb->qp_state = EHCA_QPS_INIT;
1374                 update_mask = 0;
1375                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
1376
1377                 h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1378                                          my_qp->ipz_qp_handle,
1379                                          &my_qp->pf,
1380                                          update_mask,
1381                                          mqpcb,
1382                                          my_qp->galpas.kernel);
1383
1384                 if (h_ret != H_SUCCESS) {
1385                         ret = ehca2ib_return_code(h_ret);
1386                         ehca_err(ibqp->device, "ENABLE in context of "
1387                                  "RESET_2_INIT failed! Maybe you didn't get "
1388                                  "a LID h_ret=%lx ehca_qp=%p qp_num=%x",
1389                                  h_ret, my_qp, ibqp->qp_num);
1390                         goto modify_qp_exit2;
1391                 }
1392         }
1393
1394         if (statetrans == IB_QPST_ANY2RESET) {
1395                 ipz_qeit_reset(&my_qp->ipz_rqueue);
1396                 ipz_qeit_reset(&my_qp->ipz_squeue);
1397         }
1398
1399         if (attr_mask & IB_QP_QKEY)
1400                 my_qp->qkey = attr->qkey;
1401
1402 modify_qp_exit2:
1403         if (squeue_locked) { /* this means: sqe -> rts */
1404                 spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
1405                 my_qp->sqerr_purgeflag = 1;
1406         }
1407
1408 modify_qp_exit1:
1409         ehca_free_fw_ctrlblock(mqpcb);
1410
1411         return ret;
1412 }
1413
1414 int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
1415                    struct ib_udata *udata)
1416 {
1417         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1418         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
1419                                              ib_pd);
1420         u32 cur_pid = current->tgid;
1421
1422         if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
1423             my_pd->ownpid != cur_pid) {
1424                 ehca_err(ibqp->pd->device, "Invalid caller pid=%x ownpid=%x",
1425                          cur_pid, my_pd->ownpid);
1426                 return -EINVAL;
1427         }
1428
1429         return internal_modify_qp(ibqp, attr, attr_mask, 0);
1430 }
1431
1432 int ehca_query_qp(struct ib_qp *qp,
1433                   struct ib_qp_attr *qp_attr,
1434                   int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
1435 {
1436         struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
1437         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
1438                                              ib_pd);
1439         struct ehca_shca *shca = container_of(qp->device, struct ehca_shca,
1440                                               ib_device);
1441         struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
1442         struct hcp_modify_qp_control_block *qpcb;
1443         u32 cur_pid = current->tgid;
1444         int cnt, ret = 0;
1445         u64 h_ret;
1446
1447         if (my_pd->ib_pd.uobject  && my_pd->ib_pd.uobject->context  &&
1448             my_pd->ownpid != cur_pid) {
1449                 ehca_err(qp->device, "Invalid caller pid=%x ownpid=%x",
1450                          cur_pid, my_pd->ownpid);
1451                 return -EINVAL;
1452         }
1453
1454         if (qp_attr_mask & QP_ATTR_QUERY_NOT_SUPPORTED) {
1455                 ehca_err(qp->device, "Invalid attribute mask "
1456                          "ehca_qp=%p qp_num=%x qp_attr_mask=%x ",
1457                          my_qp, qp->qp_num, qp_attr_mask);
1458                 return -EINVAL;
1459         }
1460
1461         qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1462         if (!qpcb) {
1463                 ehca_err(qp->device, "Out of memory for qpcb "
1464                          "ehca_qp=%p qp_num=%x", my_qp, qp->qp_num);
1465                 return -ENOMEM;
1466         }
1467
1468         h_ret = hipz_h_query_qp(adapter_handle,
1469                                 my_qp->ipz_qp_handle,
1470                                 &my_qp->pf,
1471                                 qpcb, my_qp->galpas.kernel);
1472
1473         if (h_ret != H_SUCCESS) {
1474                 ret = ehca2ib_return_code(h_ret);
1475                 ehca_err(qp->device, "hipz_h_query_qp() failed "
1476                          "ehca_qp=%p qp_num=%x h_ret=%lx",
1477                          my_qp, qp->qp_num, h_ret);
1478                 goto query_qp_exit1;
1479         }
1480
1481         qp_attr->cur_qp_state = ehca2ib_qp_state(qpcb->qp_state);
1482         qp_attr->qp_state = qp_attr->cur_qp_state;
1483
1484         if (qp_attr->cur_qp_state == -EINVAL) {
1485                 ret = -EINVAL;
1486                 ehca_err(qp->device, "Got invalid ehca_qp_state=%x "
1487                          "ehca_qp=%p qp_num=%x",
1488                          qpcb->qp_state, my_qp, qp->qp_num);
1489                 goto query_qp_exit1;
1490         }
1491
1492         if (qp_attr->qp_state == IB_QPS_SQD)
1493                 qp_attr->sq_draining = 1;
1494
1495         qp_attr->qkey = qpcb->qkey;
1496         qp_attr->path_mtu = qpcb->path_mtu;
1497         qp_attr->path_mig_state = qpcb->path_migration_state;
1498         qp_attr->rq_psn = qpcb->receive_psn;
1499         qp_attr->sq_psn = qpcb->send_psn;
1500         qp_attr->min_rnr_timer = qpcb->min_rnr_nak_timer_field;
1501         qp_attr->cap.max_send_wr = qpcb->max_nr_outst_send_wr-1;
1502         qp_attr->cap.max_recv_wr = qpcb->max_nr_outst_recv_wr-1;
1503         /* UD_AV CIRCUMVENTION */
1504         if (my_qp->qp_type == IB_QPT_UD) {
1505                 qp_attr->cap.max_send_sge =
1506                         qpcb->actual_nr_sges_in_sq_wqe - 2;
1507                 qp_attr->cap.max_recv_sge =
1508                         qpcb->actual_nr_sges_in_rq_wqe - 2;
1509         } else {
1510                 qp_attr->cap.max_send_sge =
1511                         qpcb->actual_nr_sges_in_sq_wqe;
1512                 qp_attr->cap.max_recv_sge =
1513                         qpcb->actual_nr_sges_in_rq_wqe;
1514         }
1515
1516         qp_attr->cap.max_inline_data = my_qp->sq_max_inline_data_size;
1517         qp_attr->dest_qp_num = qpcb->dest_qp_nr;
1518
1519         qp_attr->pkey_index =
1520                 EHCA_BMASK_GET(MQPCB_PRIM_P_KEY_IDX, qpcb->prim_p_key_idx);
1521
1522         qp_attr->port_num =
1523                 EHCA_BMASK_GET(MQPCB_PRIM_PHYS_PORT, qpcb->prim_phys_port);
1524
1525         qp_attr->timeout = qpcb->timeout;
1526         qp_attr->retry_cnt = qpcb->retry_count;
1527         qp_attr->rnr_retry = qpcb->rnr_retry_count;
1528
1529         qp_attr->alt_pkey_index =
1530                 EHCA_BMASK_GET(MQPCB_PRIM_P_KEY_IDX, qpcb->alt_p_key_idx);
1531
1532         qp_attr->alt_port_num = qpcb->alt_phys_port;
1533         qp_attr->alt_timeout = qpcb->timeout_al;
1534
1535         qp_attr->max_dest_rd_atomic = qpcb->rdma_nr_atomic_resp_res;
1536         qp_attr->max_rd_atomic = qpcb->rdma_atomic_outst_dest_qp;
1537
1538         /* primary av */
1539         qp_attr->ah_attr.sl = qpcb->service_level;
1540
1541         if (qpcb->send_grh_flag) {
1542                 qp_attr->ah_attr.ah_flags = IB_AH_GRH;
1543         }
1544
1545         qp_attr->ah_attr.static_rate = qpcb->max_static_rate;
1546         qp_attr->ah_attr.dlid = qpcb->dlid;
1547         qp_attr->ah_attr.src_path_bits = qpcb->source_path_bits;
1548         qp_attr->ah_attr.port_num = qp_attr->port_num;
1549
1550         /* primary GRH */
1551         qp_attr->ah_attr.grh.traffic_class = qpcb->traffic_class;
1552         qp_attr->ah_attr.grh.hop_limit = qpcb->hop_limit;
1553         qp_attr->ah_attr.grh.sgid_index = qpcb->source_gid_idx;
1554         qp_attr->ah_attr.grh.flow_label = qpcb->flow_label;
1555
1556         for (cnt = 0; cnt < 16; cnt++)
1557                 qp_attr->ah_attr.grh.dgid.raw[cnt] =
1558                         qpcb->dest_gid.byte[cnt];
1559
1560         /* alternate AV */
1561         qp_attr->alt_ah_attr.sl = qpcb->service_level_al;
1562         if (qpcb->send_grh_flag_al) {
1563                 qp_attr->alt_ah_attr.ah_flags = IB_AH_GRH;
1564         }
1565
1566         qp_attr->alt_ah_attr.static_rate = qpcb->max_static_rate_al;
1567         qp_attr->alt_ah_attr.dlid = qpcb->dlid_al;
1568         qp_attr->alt_ah_attr.src_path_bits = qpcb->source_path_bits_al;
1569
1570         /* alternate GRH */
1571         qp_attr->alt_ah_attr.grh.traffic_class = qpcb->traffic_class_al;
1572         qp_attr->alt_ah_attr.grh.hop_limit = qpcb->hop_limit_al;
1573         qp_attr->alt_ah_attr.grh.sgid_index = qpcb->source_gid_idx_al;
1574         qp_attr->alt_ah_attr.grh.flow_label = qpcb->flow_label_al;
1575
1576         for (cnt = 0; cnt < 16; cnt++)
1577                 qp_attr->alt_ah_attr.grh.dgid.raw[cnt] =
1578                         qpcb->dest_gid_al.byte[cnt];
1579
1580         /* return init attributes given in ehca_create_qp */
1581         if (qp_init_attr)
1582                 *qp_init_attr = my_qp->init_attr;
1583
1584         if (ehca_debug_level)
1585                 ehca_dmp(qpcb, 4*70, "qp_num=%x", qp->qp_num);
1586
1587 query_qp_exit1:
1588         ehca_free_fw_ctrlblock(qpcb);
1589
1590         return ret;
1591 }
1592
1593 int ehca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
1594                     enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
1595 {
1596         struct ehca_qp *my_qp =
1597                 container_of(ibsrq, struct ehca_qp, ib_srq);
1598         struct ehca_pd *my_pd =
1599                 container_of(ibsrq->pd, struct ehca_pd, ib_pd);
1600         struct ehca_shca *shca =
1601                 container_of(ibsrq->pd->device, struct ehca_shca, ib_device);
1602         struct hcp_modify_qp_control_block *mqpcb;
1603         u64 update_mask;
1604         u64 h_ret;
1605         int ret = 0;
1606
1607         u32 cur_pid = current->tgid;
1608         if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
1609             my_pd->ownpid != cur_pid) {
1610                 ehca_err(ibsrq->pd->device, "Invalid caller pid=%x ownpid=%x",
1611                          cur_pid, my_pd->ownpid);
1612                 return -EINVAL;
1613         }
1614
1615         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1616         if (!mqpcb) {
1617                 ehca_err(ibsrq->device, "Could not get zeroed page for mqpcb "
1618                          "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
1619                 return -ENOMEM;
1620         }
1621
1622         update_mask = 0;
1623         if (attr_mask & IB_SRQ_LIMIT) {
1624                 attr_mask &= ~IB_SRQ_LIMIT;
1625                 update_mask |=
1626                         EHCA_BMASK_SET(MQPCB_MASK_CURR_SRQ_LIMIT, 1)
1627                         | EHCA_BMASK_SET(MQPCB_MASK_QP_AFF_ASYN_EV_LOG_REG, 1);
1628                 mqpcb->curr_srq_limit =
1629                         EHCA_BMASK_SET(MQPCB_CURR_SRQ_LIMIT, attr->srq_limit);
1630                 mqpcb->qp_aff_asyn_ev_log_reg =
1631                         EHCA_BMASK_SET(QPX_AAELOG_RESET_SRQ_LIMIT, 1);
1632         }
1633
1634         /* by now, all bits in attr_mask should have been cleared */
1635         if (attr_mask) {
1636                 ehca_err(ibsrq->device, "invalid attribute mask bits set  "
1637                          "attr_mask=%x", attr_mask);
1638                 ret = -EINVAL;
1639                 goto modify_srq_exit0;
1640         }
1641
1642         if (ehca_debug_level)
1643                 ehca_dmp(mqpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
1644
1645         h_ret = hipz_h_modify_qp(shca->ipz_hca_handle, my_qp->ipz_qp_handle,
1646                                  NULL, update_mask, mqpcb,
1647                                  my_qp->galpas.kernel);
1648
1649         if (h_ret != H_SUCCESS) {
1650                 ret = ehca2ib_return_code(h_ret);
1651                 ehca_err(ibsrq->device, "hipz_h_modify_qp() failed rc=%lx "
1652                          "ehca_qp=%p qp_num=%x",
1653                          h_ret, my_qp, my_qp->real_qp_num);
1654         }
1655
1656 modify_srq_exit0:
1657         ehca_free_fw_ctrlblock(mqpcb);
1658
1659         return ret;
1660 }
1661
1662 int ehca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr)
1663 {
1664         struct ehca_qp *my_qp = container_of(srq, struct ehca_qp, ib_srq);
1665         struct ehca_pd *my_pd = container_of(srq->pd, struct ehca_pd, ib_pd);
1666         struct ehca_shca *shca = container_of(srq->device, struct ehca_shca,
1667                                               ib_device);
1668         struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
1669         struct hcp_modify_qp_control_block *qpcb;
1670         u32 cur_pid = current->tgid;
1671         int ret = 0;
1672         u64 h_ret;
1673
1674         if (my_pd->ib_pd.uobject  && my_pd->ib_pd.uobject->context  &&
1675             my_pd->ownpid != cur_pid) {
1676                 ehca_err(srq->device, "Invalid caller pid=%x ownpid=%x",
1677                          cur_pid, my_pd->ownpid);
1678                 return -EINVAL;
1679         }
1680
1681         qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1682         if (!qpcb) {
1683                 ehca_err(srq->device, "Out of memory for qpcb "
1684                          "ehca_qp=%p qp_num=%x", my_qp, my_qp->real_qp_num);
1685                 return -ENOMEM;
1686         }
1687
1688         h_ret = hipz_h_query_qp(adapter_handle, my_qp->ipz_qp_handle,
1689                                 NULL, qpcb, my_qp->galpas.kernel);
1690
1691         if (h_ret != H_SUCCESS) {
1692                 ret = ehca2ib_return_code(h_ret);
1693                 ehca_err(srq->device, "hipz_h_query_qp() failed "
1694                          "ehca_qp=%p qp_num=%x h_ret=%lx",
1695                          my_qp, my_qp->real_qp_num, h_ret);
1696                 goto query_srq_exit1;
1697         }
1698
1699         srq_attr->max_wr = qpcb->max_nr_outst_recv_wr - 1;
1700         srq_attr->srq_limit = EHCA_BMASK_GET(
1701                 MQPCB_CURR_SRQ_LIMIT, qpcb->curr_srq_limit);
1702
1703         if (ehca_debug_level)
1704                 ehca_dmp(qpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
1705
1706 query_srq_exit1:
1707         ehca_free_fw_ctrlblock(qpcb);
1708
1709         return ret;
1710 }
1711
1712 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
1713                                struct ib_uobject *uobject)
1714 {
1715         struct ehca_shca *shca = container_of(dev, struct ehca_shca, ib_device);
1716         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
1717                                              ib_pd);
1718         u32 cur_pid = current->tgid;
1719         u32 qp_num = my_qp->real_qp_num;
1720         int ret;
1721         u64 h_ret;
1722         u8 port_num;
1723         enum ib_qp_type qp_type;
1724         unsigned long flags;
1725
1726         if (uobject) {
1727                 if (my_qp->mm_count_galpa ||
1728                     my_qp->mm_count_rqueue || my_qp->mm_count_squeue) {
1729                         ehca_err(dev, "Resources still referenced in "
1730                                  "user space qp_num=%x", qp_num);
1731                         return -EINVAL;
1732                 }
1733                 if (my_pd->ownpid != cur_pid) {
1734                         ehca_err(dev, "Invalid caller pid=%x ownpid=%x",
1735                                  cur_pid, my_pd->ownpid);
1736                         return -EINVAL;
1737                 }
1738         }
1739
1740         if (my_qp->send_cq) {
1741                 ret = ehca_cq_unassign_qp(my_qp->send_cq, qp_num);
1742                 if (ret) {
1743                         ehca_err(dev, "Couldn't unassign qp from "
1744                                  "send_cq ret=%x qp_num=%x cq_num=%x", ret,
1745                                  qp_num, my_qp->send_cq->cq_number);
1746                         return ret;
1747                 }
1748         }
1749
1750         write_lock_irqsave(&ehca_qp_idr_lock, flags);
1751         idr_remove(&ehca_qp_idr, my_qp->token);
1752         write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
1753
1754         h_ret = hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
1755         if (h_ret != H_SUCCESS) {
1756                 ehca_err(dev, "hipz_h_destroy_qp() failed rc=%lx "
1757                          "ehca_qp=%p qp_num=%x", h_ret, my_qp, qp_num);
1758                 return ehca2ib_return_code(h_ret);
1759         }
1760
1761         port_num = my_qp->init_attr.port_num;
1762         qp_type  = my_qp->init_attr.qp_type;
1763
1764         /* no support for IB_QPT_SMI yet */
1765         if (qp_type == IB_QPT_GSI) {
1766                 struct ib_event event;
1767                 ehca_info(dev, "device %s: port %x is inactive.",
1768                           shca->ib_device.name, port_num);
1769                 event.device = &shca->ib_device;
1770                 event.event = IB_EVENT_PORT_ERR;
1771                 event.element.port_num = port_num;
1772                 shca->sport[port_num - 1].port_state = IB_PORT_DOWN;
1773                 ib_dispatch_event(&event);
1774         }
1775
1776         if (HAS_RQ(my_qp))
1777                 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
1778         if (HAS_SQ(my_qp))
1779                 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
1780         kmem_cache_free(qp_cache, my_qp);
1781         return 0;
1782 }
1783
1784 int ehca_destroy_qp(struct ib_qp *qp)
1785 {
1786         return internal_destroy_qp(qp->device,
1787                                    container_of(qp, struct ehca_qp, ib_qp),
1788                                    qp->uobject);
1789 }
1790
1791 int ehca_destroy_srq(struct ib_srq *srq)
1792 {
1793         return internal_destroy_qp(srq->device,
1794                                    container_of(srq, struct ehca_qp, ib_srq),
1795                                    srq->uobject);
1796 }
1797
1798 int ehca_init_qp_cache(void)
1799 {
1800         qp_cache = kmem_cache_create("ehca_cache_qp",
1801                                      sizeof(struct ehca_qp), 0,
1802                                      SLAB_HWCACHE_ALIGN,
1803                                      NULL);
1804         if (!qp_cache)
1805                 return -ENOMEM;
1806         return 0;
1807 }
1808
1809 void ehca_cleanup_qp_cache(void)
1810 {
1811         if (qp_cache)
1812                 kmem_cache_destroy(qp_cache);
1813 }