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 #include "ehca_classes.h"
  47 #include "ehca_tools.h"
  48 #include "ehca_qes.h"
  49 #include "ehca_iverbs.h"
  50 #include "hcp_if.h"
  51 #include "hipz_fns.h"
  52
  53 static struct kmem_cache *qp_cache;
  54
  55 /*
  56  * attributes not supported by query qp
  57  */
  58 #define QP_ATTR_QUERY_NOT_SUPPORTED (IB_QP_MAX_DEST_RD_ATOMIC | \
  59                                      IB_QP_MAX_QP_RD_ATOMIC   | \
  60                                      IB_QP_ACCESS_FLAGS       | \
  61                                      IB_QP_EN_SQD_ASYNC_NOTIFY)
  62
  63 /*
  64  * ehca (internal) qp state values
  65  */
  66 enum ehca_qp_state {
  67         EHCA_QPS_RESET = 1,
  68         EHCA_QPS_INIT = 2,
  69         EHCA_QPS_RTR = 3,
  70         EHCA_QPS_RTS = 5,
  71         EHCA_QPS_SQD = 6,
  72         EHCA_QPS_SQE = 8,
  73         EHCA_QPS_ERR = 128
  74 };
  75
  76 /*
  77  * qp state transitions as defined by IB Arch Rel 1.1 page 431
  78  */
  79 enum ib_qp_statetrans {
  80         IB_QPST_ANY2RESET,
  81         IB_QPST_ANY2ERR,
  82         IB_QPST_RESET2INIT,
  83         IB_QPST_INIT2RTR,
  84         IB_QPST_INIT2INIT,
  85         IB_QPST_RTR2RTS,
  86         IB_QPST_RTS2SQD,
  87         IB_QPST_RTS2RTS,
  88         IB_QPST_SQD2RTS,
  89         IB_QPST_SQE2RTS,
  90         IB_QPST_SQD2SQD,
  91         IB_QPST_MAX     /* nr of transitions, this must be last!!! */
  92 };
  93
  94 /*
  95  * ib2ehca_qp_state maps IB to ehca qp_state
  96  * returns ehca qp state corresponding to given ib qp state
  97  */
  98 static inline enum ehca_qp_state ib2ehca_qp_state(enum ib_qp_state ib_qp_state)
  99 {
 100         switch (ib_qp_state) {
 101         case IB_QPS_RESET:
 102                 return EHCA_QPS_RESET;
 103         case IB_QPS_INIT:
 104                 return EHCA_QPS_INIT;
 105         case IB_QPS_RTR:
 106                 return EHCA_QPS_RTR;
 107         case IB_QPS_RTS:
 108                 return EHCA_QPS_RTS;
 109         case IB_QPS_SQD:
 110                 return EHCA_QPS_SQD;
 111         case IB_QPS_SQE:
 112                 return EHCA_QPS_SQE;
 113         case IB_QPS_ERR:
 114                 return EHCA_QPS_ERR;
 115         default:
 116                 ehca_gen_err("invalid ib_qp_state=%x", ib_qp_state);
 117                 return -EINVAL;
 118         }
 119 }
 120
 121 /*
 122  * ehca2ib_qp_state maps ehca to IB qp_state
 123  * returns ib qp state corresponding to given ehca qp state
 124  */
 125 static inline enum ib_qp_state ehca2ib_qp_state(enum ehca_qp_state
 126                                                 ehca_qp_state)
 127 {
 128         switch (ehca_qp_state) {
 129         case EHCA_QPS_RESET:
 130                 return IB_QPS_RESET;
 131         case EHCA_QPS_INIT:
 132                 return IB_QPS_INIT;
 133         case EHCA_QPS_RTR:
 134                 return IB_QPS_RTR;
 135         case EHCA_QPS_RTS:
 136                 return IB_QPS_RTS;
 137         case EHCA_QPS_SQD:
 138                 return IB_QPS_SQD;
 139         case EHCA_QPS_SQE:
 140                 return IB_QPS_SQE;
 141         case EHCA_QPS_ERR:
 142                 return IB_QPS_ERR;
 143         default:
 144                 ehca_gen_err("invalid ehca_qp_state=%x", ehca_qp_state);
 145                 return -EINVAL;
 146         }
 147 }
 148
 149 /*
 150  * ehca_qp_type used as index for req_attr and opt_attr of
 151  * struct ehca_modqp_statetrans
 152  */
 153 enum ehca_qp_type {
 154         QPT_RC = 0,
 155         QPT_UC = 1,
 156         QPT_UD = 2,
 157         QPT_SQP = 3,
 158         QPT_MAX
 159 };
 160
 161 /*
 162  * ib2ehcaqptype maps Ib to ehca qp_type
 163  * returns ehca qp type corresponding to ib qp type
 164  */
 165 static inline enum ehca_qp_type ib2ehcaqptype(enum ib_qp_type ibqptype)
 166 {
 167         switch (ibqptype) {
 168         case IB_QPT_SMI:
 169         case IB_QPT_GSI:
 170                 return QPT_SQP;
 171         case IB_QPT_RC:
 172                 return QPT_RC;
 173         case IB_QPT_UC:
 174                 return QPT_UC;
 175         case IB_QPT_UD:
 176                 return QPT_UD;
 177         default:
 178                 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
 179                 return -EINVAL;
 180         }
 181 }
 182
 183 static inline enum ib_qp_statetrans get_modqp_statetrans(int ib_fromstate,
 184                                                          int ib_tostate)
 185 {
 186         int index = -EINVAL;
 187         switch (ib_tostate) {
 188         case IB_QPS_RESET:
 189                 index = IB_QPST_ANY2RESET;
 190                 break;
 191         case IB_QPS_INIT:
 192                 switch (ib_fromstate) {
 193                 case IB_QPS_RESET:
 194                         index = IB_QPST_RESET2INIT;
 195                         break;
 196                 case IB_QPS_INIT:
 197                         index = IB_QPST_INIT2INIT;
 198                         break;
 199                 }
 200                 break;
 201         case IB_QPS_RTR:
 202                 if (ib_fromstate == IB_QPS_INIT)
 203                         index = IB_QPST_INIT2RTR;
 204                 break;
 205         case IB_QPS_RTS:
 206                 switch (ib_fromstate) {
 207                 case IB_QPS_RTR:
 208                         index = IB_QPST_RTR2RTS;
 209                         break;
 210                 case IB_QPS_RTS:
 211                         index = IB_QPST_RTS2RTS;
 212                         break;
 213                 case IB_QPS_SQD:
 214                         index = IB_QPST_SQD2RTS;
 215                         break;
 216                 case IB_QPS_SQE:
 217                         index = IB_QPST_SQE2RTS;
 218                         break;
 219                 }
 220                 break;
 221         case IB_QPS_SQD:
 222                 if (ib_fromstate == IB_QPS_RTS)
 223                         index = IB_QPST_RTS2SQD;
 224                 break;
 225         case IB_QPS_SQE:
 226                 break;
 227         case IB_QPS_ERR:
 228                 index = IB_QPST_ANY2ERR;
 229                 break;
 230         default:
 231                 break;
 232         }
 233         return index;
 234 }
 235
 236 /*
 237  * ibqptype2servicetype returns hcp service type corresponding to given
 238  * ib qp type used by create_qp()
 239  */
 240 static inline int ibqptype2servicetype(enum ib_qp_type ibqptype)
 241 {
 242         switch (ibqptype) {
 243         case IB_QPT_SMI:
 244         case IB_QPT_GSI:
 245                 return ST_UD;
 246         case IB_QPT_RC:
 247                 return ST_RC;
 248         case IB_QPT_UC:
 249                 return ST_UC;
 250         case IB_QPT_UD:
 251                 return ST_UD;
 252         case IB_QPT_RAW_IPV6:
 253                 return -EINVAL;
 254         case IB_QPT_RAW_ETY:
 255                 return -EINVAL;
 256         default:
 257                 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
 258                 return -EINVAL;
 259         }
 260 }
 261
 262 /*
 263  * init userspace queue info from ipz_queue data
 264  */
 265 static inline void queue2resp(struct ipzu_queue_resp *resp,
 266                               struct ipz_queue *queue)
 267 {
 268         resp->qe_size = queue->qe_size;
 269         resp->act_nr_of_sg = queue->act_nr_of_sg;
 270         resp->queue_length = queue->queue_length;
 271         resp->pagesize = queue->pagesize;
 272         resp->toggle_state = queue->toggle_state;
 273         resp->offset = queue->offset;
 274 }
 275
 276 /*
 277  * init_qp_queue initializes/constructs r/squeue and registers queue pages.
 278  */
 279 static inline int init_qp_queue(struct ehca_shca *shca,
 280                                 struct ehca_pd *pd,
 281                                 struct ehca_qp *my_qp,
 282                                 struct ipz_queue *queue,
 283                                 int q_type,
 284                                 u64 expected_hret,
 285                                 struct ehca_alloc_queue_parms *parms,
 286                                 int wqe_size)
 287 {
 288         int ret, cnt, ipz_rc, nr_q_pages;
 289         void *vpage;
 290         u64 rpage, h_ret;
 291         struct ib_device *ib_dev = &shca->ib_device;
 292         struct ipz_adapter_handle ipz_hca_handle = shca->ipz_hca_handle;
 293
 294         if (!parms->queue_size)
 295                 return 0;
 296
 297         if (parms->is_small) {
 298                 nr_q_pages = 1;
 299                 ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
 300                                         128 << parms->page_size,
 301                                         wqe_size, parms->act_nr_sges, 1);
 302         } else {
 303                 nr_q_pages = parms->queue_size;
 304                 ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
 305                                         EHCA_PAGESIZE, wqe_size,
 306                                         parms->act_nr_sges, 0);
 307         }
 308
 309         if (!ipz_rc) {
 310                 ehca_err(ib_dev, "Cannot allocate page for queue. ipz_rc=%i",
 311                          ipz_rc);
 312                 return -EBUSY;
 313         }
 314
 315         /* register queue pages */
 316         for (cnt = 0; cnt < nr_q_pages; cnt++) {
 317                 vpage = ipz_qpageit_get_inc(queue);
 318                 if (!vpage) {
 319                         ehca_err(ib_dev, "ipz_qpageit_get_inc() "
 320                                  "failed p_vpage= %p", vpage);
 321                         ret = -EINVAL;
 322                         goto init_qp_queue1;
 323                 }
 324                 rpage = virt_to_abs(vpage);
 325
 326                 h_ret = hipz_h_register_rpage_qp(ipz_hca_handle,
 327                                                  my_qp->ipz_qp_handle,
 328                                                  NULL, 0, q_type,
 329                                                  rpage, parms->is_small ? 0 : 1,
 330                                                  my_qp->galpas.kernel);
 331                 if (cnt == (nr_q_pages - 1)) {  /* last page! */
 332                         if (h_ret != expected_hret) {
 333                                 ehca_err(ib_dev, "hipz_qp_register_rpage() "
 334                                          "h_ret=%li", h_ret);
 335                                 ret = ehca2ib_return_code(h_ret);
 336                                 goto init_qp_queue1;
 337                         }
 338                         vpage = ipz_qpageit_get_inc(&my_qp->ipz_rqueue);
 339                         if (vpage) {
 340                                 ehca_err(ib_dev, "ipz_qpageit_get_inc() "
 341                                          "should not succeed vpage=%p", vpage);
 342                                 ret = -EINVAL;
 343                                 goto init_qp_queue1;
 344                         }
 345                 } else {
 346                         if (h_ret != H_PAGE_REGISTERED) {
 347                                 ehca_err(ib_dev, "hipz_qp_register_rpage() "
 348                                          "h_ret=%li", h_ret);
 349                                 ret = ehca2ib_return_code(h_ret);
 350                                 goto init_qp_queue1;
 351                         }
 352                 }
 353         }
 354
 355         ipz_qeit_reset(queue);
 356
 357         return 0;
 358
 359 init_qp_queue1:
 360         ipz_queue_dtor(pd, queue);
 361         return ret;
 362 }
 363
 364 static inline int ehca_calc_wqe_size(int act_nr_sge, int is_llqp)
 365 {
 366         if (is_llqp)
 367                 return 128 << act_nr_sge;
 368         else
 369                 return offsetof(struct ehca_wqe,
 370                                 u.nud.sg_list[act_nr_sge]);
 371 }
 372
 373 static void ehca_determine_small_queue(struct ehca_alloc_queue_parms *queue,
 374                                        int req_nr_sge, int is_llqp)
 375 {
 376         u32 wqe_size, q_size;
 377         int act_nr_sge = req_nr_sge;
 378
 379         if (!is_llqp)
 380                 /* round up #SGEs so WQE size is a power of 2 */
 381                 for (act_nr_sge = 4; act_nr_sge <= 252;
 382                      act_nr_sge = 4 + 2 * act_nr_sge)
 383                         if (act_nr_sge >= req_nr_sge)
 384                                 break;
 385
 386         wqe_size = ehca_calc_wqe_size(act_nr_sge, is_llqp);
 387         q_size = wqe_size * (queue->max_wr + 1);
 388
 389         if (q_size <= 512)
 390                 queue->page_size = 2;
 391         else if (q_size <= 1024)
 392                 queue->page_size = 3;
 393         else
 394                 queue->page_size = 0;
 395
 396         queue->is_small = (queue->page_size != 0);
 397 }
 398
 399 /* needs to be called with cq->spinlock held */
 400 void ehca_add_to_err_list(struct ehca_qp *qp, int on_sq)
 401 {
 402         struct list_head *list, *node;
 403
 404         /* TODO: support low latency QPs */
 405         if (qp->ext_type == EQPT_LLQP)
 406                 return;
 407
 408         if (on_sq) {
 409                 list = &qp->send_cq->sqp_err_list;
 410                 node = &qp->sq_err_node;
 411         } else {
 412                 list = &qp->recv_cq->rqp_err_list;
 413                 node = &qp->rq_err_node;
 414         }
 415
 416         if (list_empty(node))
 417                 list_add_tail(node, list);
 418
 419         return;
 420 }
 421
 422 static void del_from_err_list(struct ehca_cq *cq, struct list_head *node)
 423 {
 424         unsigned long flags;
 425
 426         spin_lock_irqsave(&cq->spinlock, flags);
 427
 428         if (!list_empty(node))
 429                 list_del_init(node);
 430
 431         spin_unlock_irqrestore(&cq->spinlock, flags);
 432 }
 433
 434 static void reset_queue_map(struct ehca_queue_map *qmap)
 435 {
 436         int i;
 437
 438         qmap->tail = qmap->entries - 1;
 439         qmap->left_to_poll = 0;
 440         qmap->next_wqe_idx = 0;
 441         for (i = 0; i < qmap->entries; i++) {
 442                 qmap->map[i].reported = 1;
 443                 qmap->map[i].cqe_req = 0;
 444         }
 445 }
 446
 447 /*
 448  * Create an ib_qp struct that is either a QP or an SRQ, depending on
 449  * the value of the is_srq parameter. If init_attr and srq_init_attr share
 450  * fields, the field out of init_attr is used.
 451  */
 452 static struct ehca_qp *internal_create_qp(
 453         struct ib_pd *pd,
 454         struct ib_qp_init_attr *init_attr,
 455         struct ib_srq_init_attr *srq_init_attr,
 456         struct ib_udata *udata, int is_srq)
 457 {
 458         struct ehca_qp *my_qp, *my_srq = NULL;
 459         struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
 460         struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
 461                                               ib_device);
 462         struct ib_ucontext *context = NULL;
 463         u64 h_ret;
 464         int is_llqp = 0, has_srq = 0;
 465         int qp_type, max_send_sge, max_recv_sge, ret;
 466
 467         /* h_call's out parameters */
 468         struct ehca_alloc_qp_parms parms;
 469         u32 swqe_size = 0, rwqe_size = 0, ib_qp_num;
 470         unsigned long flags;
 471
 472         if (!atomic_add_unless(&shca->num_qps, 1, shca->max_num_qps)) {
 473                 ehca_err(pd->device, "Unable to create QP, max number of %i "
 474                          "QPs reached.", shca->max_num_qps);
 475                 ehca_err(pd->device, "To increase the maximum number of QPs "
 476                          "use the number_of_qps module parameter.\n");
 477                 return ERR_PTR(-ENOSPC);
 478         }
 479
 480         if (init_attr->create_flags) {
 481                 atomic_dec(&shca->num_qps);
 482                 return ERR_PTR(-EINVAL);
 483         }
 484
 485         memset(&parms, 0, sizeof(parms));
 486         qp_type = init_attr->qp_type;
 487
 488         if (init_attr->sq_sig_type != IB_SIGNAL_REQ_WR &&
 489                 init_attr->sq_sig_type != IB_SIGNAL_ALL_WR) {
 490                 ehca_err(pd->device, "init_attr->sg_sig_type=%x not allowed",
 491                          init_attr->sq_sig_type);
 492                 atomic_dec(&shca->num_qps);
 493                 return ERR_PTR(-EINVAL);
 494         }
 495
 496         /* save LLQP info */
 497         if (qp_type & 0x80) {
 498                 is_llqp = 1;
 499                 parms.ext_type = EQPT_LLQP;
 500                 parms.ll_comp_flags = qp_type & LLQP_COMP_MASK;
 501         }
 502         qp_type &= 0x1F;
 503         init_attr->qp_type &= 0x1F;
 504
 505         /* handle SRQ base QPs */
 506         if (init_attr->srq) {
 507                 my_srq = container_of(init_attr->srq, struct ehca_qp, ib_srq);
 508
 509                 if (qp_type == IB_QPT_UC) {
 510                         ehca_err(pd->device, "UC with SRQ not supported");
 511                         atomic_dec(&shca->num_qps);
 512                         return ERR_PTR(-EINVAL);
 513                 }
 514
 515                 has_srq = 1;
 516                 parms.ext_type = EQPT_SRQBASE;
 517                 parms.srq_qpn = my_srq->real_qp_num;
 518         }
 519
 520         if (is_llqp && has_srq) {
 521                 ehca_err(pd->device, "LLQPs can't have an SRQ");
 522                 atomic_dec(&shca->num_qps);
 523                 return ERR_PTR(-EINVAL);
 524         }
 525
 526         /* handle SRQs */
 527         if (is_srq) {
 528                 parms.ext_type = EQPT_SRQ;
 529                 parms.srq_limit = srq_init_attr->attr.srq_limit;
 530                 if (init_attr->cap.max_recv_sge > 3) {
 531                         ehca_err(pd->device, "no more than three SGEs "
 532                                  "supported for SRQ  pd=%p  max_sge=%x",
 533                                  pd, init_attr->cap.max_recv_sge);
 534                         atomic_dec(&shca->num_qps);
 535                         return ERR_PTR(-EINVAL);
 536                 }
 537         }
 538
 539         /* check QP type */
 540         if (qp_type != IB_QPT_UD &&
 541             qp_type != IB_QPT_UC &&
 542             qp_type != IB_QPT_RC &&
 543             qp_type != IB_QPT_SMI &&
 544             qp_type != IB_QPT_GSI) {
 545                 ehca_err(pd->device, "wrong QP Type=%x", qp_type);
 546                 atomic_dec(&shca->num_qps);
 547                 return ERR_PTR(-EINVAL);
 548         }
 549
 550         if (is_llqp) {
 551                 switch (qp_type) {
 552                 case IB_QPT_RC:
 553                         if ((init_attr->cap.max_send_wr > 255) ||
 554                             (init_attr->cap.max_recv_wr > 255)) {
 555                                 ehca_err(pd->device,
 556                                          "Invalid Number of max_sq_wr=%x "
 557                                          "or max_rq_wr=%x for RC LLQP",
 558                                          init_attr->cap.max_send_wr,
 559                                          init_attr->cap.max_recv_wr);
 560                                 atomic_dec(&shca->num_qps);
 561                                 return ERR_PTR(-EINVAL);
 562                         }
 563                         break;
 564                 case IB_QPT_UD:
 565                         if (!EHCA_BMASK_GET(HCA_CAP_UD_LL_QP, shca->hca_cap)) {
 566                                 ehca_err(pd->device, "UD LLQP not supported "
 567                                          "by this adapter");
 568                                 atomic_dec(&shca->num_qps);
 569                                 return ERR_PTR(-ENOSYS);
 570                         }
 571                         if (!(init_attr->cap.max_send_sge <= 5
 572                             && init_attr->cap.max_send_sge >= 1
 573                             && init_attr->cap.max_recv_sge <= 5
 574                             && init_attr->cap.max_recv_sge >= 1)) {
 575                                 ehca_err(pd->device,
 576                                          "Invalid Number of max_send_sge=%x "
 577                                          "or max_recv_sge=%x for UD LLQP",
 578                                          init_attr->cap.max_send_sge,
 579                                          init_attr->cap.max_recv_sge);
 580                                 atomic_dec(&shca->num_qps);
 581                                 return ERR_PTR(-EINVAL);
 582                         } else if (init_attr->cap.max_send_wr > 255) {
 583                                 ehca_err(pd->device,
 584                                          "Invalid Number of "
 585                                          "max_send_wr=%x for UD QP_TYPE=%x",
 586                                          init_attr->cap.max_send_wr, qp_type);
 587                                 atomic_dec(&shca->num_qps);
 588                                 return ERR_PTR(-EINVAL);
 589                         }
 590                         break;
 591                 default:
 592                         ehca_err(pd->device, "unsupported LL QP Type=%x",
 593                                  qp_type);
 594                         atomic_dec(&shca->num_qps);
 595                         return ERR_PTR(-EINVAL);
 596                 }
 597         } else {
 598                 int max_sge = (qp_type == IB_QPT_UD || qp_type == IB_QPT_SMI
 599                                || qp_type == IB_QPT_GSI) ? 250 : 252;
 600
 601                 if (init_attr->cap.max_send_sge > max_sge
 602                     || init_attr->cap.max_recv_sge > max_sge) {
 603                         ehca_err(pd->device, "Invalid number of SGEs requested "
 604                                  "send_sge=%x recv_sge=%x max_sge=%x",
 605                                  init_attr->cap.max_send_sge,
 606                                  init_attr->cap.max_recv_sge, max_sge);
 607                         atomic_dec(&shca->num_qps);
 608                         return ERR_PTR(-EINVAL);
 609                 }
 610         }
 611
 612         if (pd->uobject && udata)
 613                 context = pd->uobject->context;
 614
 615         my_qp = kmem_cache_zalloc(qp_cache, GFP_KERNEL);
 616         if (!my_qp) {
 617                 ehca_err(pd->device, "pd=%p not enough memory to alloc qp", pd);
 618                 atomic_dec(&shca->num_qps);
 619                 return ERR_PTR(-ENOMEM);
 620         }
 621
 622         atomic_set(&my_qp->nr_events, 0);
 623         init_waitqueue_head(&my_qp->wait_completion);
 624         spin_lock_init(&my_qp->spinlock_s);
 625         spin_lock_init(&my_qp->spinlock_r);
 626         my_qp->qp_type = qp_type;
 627         my_qp->ext_type = parms.ext_type;
 628         my_qp->state = IB_QPS_RESET;
 629
 630         if (init_attr->recv_cq)
 631                 my_qp->recv_cq =
 632                         container_of(init_attr->recv_cq, struct ehca_cq, ib_cq);
 633         if (init_attr->send_cq)
 634                 my_qp->send_cq =
 635                         container_of(init_attr->send_cq, struct ehca_cq, ib_cq);
 636
 637         do {
 638                 if (!idr_pre_get(&ehca_qp_idr, GFP_KERNEL)) {
 639                         ret = -ENOMEM;
 640                         ehca_err(pd->device, "Can't reserve idr resources.");
 641                         goto create_qp_exit0;
 642                 }
 643
 644                 write_lock_irqsave(&ehca_qp_idr_lock, flags);
 645                 ret = idr_get_new(&ehca_qp_idr, my_qp, &my_qp->token);
 646                 write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 647         } while (ret == -EAGAIN);
 648
 649         if (ret) {
 650                 ret = -ENOMEM;
 651                 ehca_err(pd->device, "Can't allocate new idr entry.");
 652                 goto create_qp_exit0;
 653         }
 654
 655         if (my_qp->token > 0x1FFFFFF) {
 656                 ret = -EINVAL;
 657                 ehca_err(pd->device, "Invalid number of qp");
 658                 goto create_qp_exit1;
 659         }
 660
 661         if (has_srq)
 662                 parms.srq_token = my_qp->token;
 663
 664         parms.servicetype = ibqptype2servicetype(qp_type);
 665         if (parms.servicetype < 0) {
 666                 ret = -EINVAL;
 667                 ehca_err(pd->device, "Invalid qp_type=%x", qp_type);
 668                 goto create_qp_exit1;
 669         }
 670
 671         /* Always signal by WQE so we can hide circ. WQEs */
 672         parms.sigtype = HCALL_SIGT_BY_WQE;
 673
 674         /* UD_AV CIRCUMVENTION */
 675         max_send_sge = init_attr->cap.max_send_sge;
 676         max_recv_sge = init_attr->cap.max_recv_sge;
 677         if (parms.servicetype == ST_UD && !is_llqp) {
 678                 max_send_sge += 2;
 679                 max_recv_sge += 2;
 680         }
 681
 682         parms.token = my_qp->token;
 683         parms.eq_handle = shca->eq.ipz_eq_handle;
 684         parms.pd = my_pd->fw_pd;
 685         if (my_qp->send_cq)
 686                 parms.send_cq_handle = my_qp->send_cq->ipz_cq_handle;
 687         if (my_qp->recv_cq)
 688                 parms.recv_cq_handle = my_qp->recv_cq->ipz_cq_handle;
 689
 690         parms.squeue.max_wr = init_attr->cap.max_send_wr;
 691         parms.rqueue.max_wr = init_attr->cap.max_recv_wr;
 692         parms.squeue.max_sge = max_send_sge;
 693         parms.rqueue.max_sge = max_recv_sge;
 694
 695         /* RC QPs need one more SWQE for unsolicited ack circumvention */
 696         if (qp_type == IB_QPT_RC)
 697                 parms.squeue.max_wr++;
 698
 699         if (EHCA_BMASK_GET(HCA_CAP_MINI_QP, shca->hca_cap)) {
 700                 if (HAS_SQ(my_qp))
 701                         ehca_determine_small_queue(
 702                                 &parms.squeue, max_send_sge, is_llqp);
 703                 if (HAS_RQ(my_qp))
 704                         ehca_determine_small_queue(
 705                                 &parms.rqueue, max_recv_sge, is_llqp);
 706                 parms.qp_storage =
 707                         (parms.squeue.is_small || parms.rqueue.is_small);
 708         }
 709
 710         h_ret = hipz_h_alloc_resource_qp(shca->ipz_hca_handle, &parms);
 711         if (h_ret != H_SUCCESS) {
 712                 ehca_err(pd->device, "h_alloc_resource_qp() failed h_ret=%li",
 713                          h_ret);
 714                 ret = ehca2ib_return_code(h_ret);
 715                 goto create_qp_exit1;
 716         }
 717
 718         ib_qp_num = my_qp->real_qp_num = parms.real_qp_num;
 719         my_qp->ipz_qp_handle = parms.qp_handle;
 720         my_qp->galpas = parms.galpas;
 721
 722         swqe_size = ehca_calc_wqe_size(parms.squeue.act_nr_sges, is_llqp);
 723         rwqe_size = ehca_calc_wqe_size(parms.rqueue.act_nr_sges, is_llqp);
 724
 725         switch (qp_type) {
 726         case IB_QPT_RC:
 727                 if (is_llqp) {
 728                         parms.squeue.act_nr_sges = 1;
 729                         parms.rqueue.act_nr_sges = 1;
 730                 }
 731                 /* hide the extra WQE */
 732                 parms.squeue.act_nr_wqes--;
 733                 break;
 734         case IB_QPT_UD:
 735         case IB_QPT_GSI:
 736         case IB_QPT_SMI:
 737                 /* UD circumvention */
 738                 if (is_llqp) {
 739                         parms.squeue.act_nr_sges = 1;
 740                         parms.rqueue.act_nr_sges = 1;
 741                 } else {
 742                         parms.squeue.act_nr_sges -= 2;
 743                         parms.rqueue.act_nr_sges -= 2;
 744                 }
 745
 746                 if (IB_QPT_GSI == qp_type || IB_QPT_SMI == qp_type) {
 747                         parms.squeue.act_nr_wqes = init_attr->cap.max_send_wr;
 748                         parms.rqueue.act_nr_wqes = init_attr->cap.max_recv_wr;
 749                         parms.squeue.act_nr_sges = init_attr->cap.max_send_sge;
 750                         parms.rqueue.act_nr_sges = init_attr->cap.max_recv_sge;
 751                         ib_qp_num = (qp_type == IB_QPT_SMI) ? 0 : 1;
 752                 }
 753
 754                 break;
 755
 756         default:
 757                 break;
 758         }
 759
 760         /* initialize r/squeue and register queue pages */
 761         if (HAS_SQ(my_qp)) {
 762                 ret = init_qp_queue(
 763                         shca, my_pd, my_qp, &my_qp->ipz_squeue, 0,
 764                         HAS_RQ(my_qp) ? H_PAGE_REGISTERED : H_SUCCESS,
 765                         &parms.squeue, swqe_size);
 766                 if (ret) {
 767                         ehca_err(pd->device, "Couldn't initialize squeue "
 768                                  "and pages ret=%i", ret);
 769                         goto create_qp_exit2;
 770                 }
 771
 772                 my_qp->sq_map.entries = my_qp->ipz_squeue.queue_length /
 773                          my_qp->ipz_squeue.qe_size;
 774                 my_qp->sq_map.map = vmalloc(my_qp->sq_map.entries *
 775                                         sizeof(struct ehca_qmap_entry));
 776                 if (!my_qp->sq_map.map) {
 777                         ehca_err(pd->device, "Couldn't allocate squeue "
 778                                  "map ret=%i", ret);
 779                         goto create_qp_exit3;
 780                 }
 781                 INIT_LIST_HEAD(&my_qp->sq_err_node);
 782                 /* to avoid the generation of bogus flush CQEs */
 783                 reset_queue_map(&my_qp->sq_map);
 784         }
 785
 786         if (HAS_RQ(my_qp)) {
 787                 ret = init_qp_queue(
 788                         shca, my_pd, my_qp, &my_qp->ipz_rqueue, 1,
 789                         H_SUCCESS, &parms.rqueue, rwqe_size);
 790                 if (ret) {
 791                         ehca_err(pd->device, "Couldn't initialize rqueue "
 792                                  "and pages ret=%i", ret);
 793                         goto create_qp_exit4;
 794                 }
 795
 796                 my_qp->rq_map.entries = my_qp->ipz_rqueue.queue_length /
 797                         my_qp->ipz_rqueue.qe_size;
 798                 my_qp->rq_map.map = vmalloc(my_qp->rq_map.entries *
 799                                 sizeof(struct ehca_qmap_entry));
 800                 if (!my_qp->rq_map.map) {
 801                         ehca_err(pd->device, "Couldn't allocate squeue "
 802                                         "map ret=%i", ret);
 803                         goto create_qp_exit5;
 804                 }
 805                 INIT_LIST_HEAD(&my_qp->rq_err_node);
 806                 /* to avoid the generation of bogus flush CQEs */
 807                 reset_queue_map(&my_qp->rq_map);
 808         } else if (init_attr->srq) {
 809                 /* this is a base QP, use the queue map of the SRQ */
 810                 my_qp->rq_map = my_srq->rq_map;
 811                 INIT_LIST_HEAD(&my_qp->rq_err_node);
 812
 813                 my_qp->ipz_rqueue = my_srq->ipz_rqueue;
 814         }
 815
 816         if (is_srq) {
 817                 my_qp->ib_srq.pd = &my_pd->ib_pd;
 818                 my_qp->ib_srq.device = my_pd->ib_pd.device;
 819
 820                 my_qp->ib_srq.srq_context = init_attr->qp_context;
 821                 my_qp->ib_srq.event_handler = init_attr->event_handler;
 822         } else {
 823                 my_qp->ib_qp.qp_num = ib_qp_num;
 824                 my_qp->ib_qp.pd = &my_pd->ib_pd;
 825                 my_qp->ib_qp.device = my_pd->ib_pd.device;
 826
 827                 my_qp->ib_qp.recv_cq = init_attr->recv_cq;
 828                 my_qp->ib_qp.send_cq = init_attr->send_cq;
 829
 830                 my_qp->ib_qp.qp_type = qp_type;
 831                 my_qp->ib_qp.srq = init_attr->srq;
 832
 833                 my_qp->ib_qp.qp_context = init_attr->qp_context;
 834                 my_qp->ib_qp.event_handler = init_attr->event_handler;
 835         }
 836
 837         init_attr->cap.max_inline_data = 0; /* not supported yet */
 838         init_attr->cap.max_recv_sge = parms.rqueue.act_nr_sges;
 839         init_attr->cap.max_recv_wr = parms.rqueue.act_nr_wqes;
 840         init_attr->cap.max_send_sge = parms.squeue.act_nr_sges;
 841         init_attr->cap.max_send_wr = parms.squeue.act_nr_wqes;
 842         my_qp->init_attr = *init_attr;
 843
 844         if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
 845                 shca->sport[init_attr->port_num - 1].ibqp_sqp[qp_type] =
 846                         &my_qp->ib_qp;
 847                 if (ehca_nr_ports < 0) {
 848                         /* alloc array to cache subsequent modify qp parms
 849                          * for autodetect mode
 850                          */
 851                         my_qp->mod_qp_parm =
 852                                 kzalloc(EHCA_MOD_QP_PARM_MAX *
 853                                         sizeof(*my_qp->mod_qp_parm),
 854                                         GFP_KERNEL);
 855                         if (!my_qp->mod_qp_parm) {
 856                                 ehca_err(pd->device,
 857                                          "Could not alloc mod_qp_parm");
 858                                 goto create_qp_exit5;
 859                         }
 860                 }
 861         }
 862
 863         /* NOTE: define_apq0() not supported yet */
 864         if (qp_type == IB_QPT_GSI) {
 865                 h_ret = ehca_define_sqp(shca, my_qp, init_attr);
 866                 if (h_ret != H_SUCCESS) {
 867                         kfree(my_qp->mod_qp_parm);
 868                         my_qp->mod_qp_parm = NULL;
 869                         /* the QP pointer is no longer valid */
 870                         shca->sport[init_attr->port_num - 1].ibqp_sqp[qp_type] =
 871                                 NULL;
 872                         ret = ehca2ib_return_code(h_ret);
 873                         goto create_qp_exit6;
 874                 }
 875         }
 876
 877         if (my_qp->send_cq) {
 878                 ret = ehca_cq_assign_qp(my_qp->send_cq, my_qp);
 879                 if (ret) {
 880                         ehca_err(pd->device,
 881                                  "Couldn't assign qp to send_cq ret=%i", ret);
 882                         goto create_qp_exit7;
 883                 }
 884         }
 885
 886         /* copy queues, galpa data to user space */
 887         if (context && udata) {
 888                 struct ehca_create_qp_resp resp;
 889                 memset(&resp, 0, sizeof(resp));
 890
 891                 resp.qp_num = my_qp->real_qp_num;
 892                 resp.token = my_qp->token;
 893                 resp.qp_type = my_qp->qp_type;
 894                 resp.ext_type = my_qp->ext_type;
 895                 resp.qkey = my_qp->qkey;
 896                 resp.real_qp_num = my_qp->real_qp_num;
 897
 898                 if (HAS_SQ(my_qp))
 899                         queue2resp(&resp.ipz_squeue, &my_qp->ipz_squeue);
 900                 if (HAS_RQ(my_qp))
 901                         queue2resp(&resp.ipz_rqueue, &my_qp->ipz_rqueue);
 902                 resp.fw_handle_ofs = (u32)
 903                         (my_qp->galpas.user.fw_handle & (PAGE_SIZE - 1));
 904
 905                 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
 906                         ehca_err(pd->device, "Copy to udata failed");
 907                         ret = -EINVAL;
 908                         goto create_qp_exit8;
 909                 }
 910         }
 911
 912         return my_qp;
 913
 914 create_qp_exit8:
 915         ehca_cq_unassign_qp(my_qp->send_cq, my_qp->real_qp_num);
 916
 917 create_qp_exit7:
 918         kfree(my_qp->mod_qp_parm);
 919
 920 create_qp_exit6:
 921         if (HAS_RQ(my_qp))
 922                 vfree(my_qp->rq_map.map);
 923
 924 create_qp_exit5:
 925         if (HAS_RQ(my_qp))
 926                 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
 927
 928 create_qp_exit4:
 929         if (HAS_SQ(my_qp))
 930                 vfree(my_qp->sq_map.map);
 931
 932 create_qp_exit3:
 933         if (HAS_SQ(my_qp))
 934                 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
 935
 936 create_qp_exit2:
 937         hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
 938
 939 create_qp_exit1:
 940         write_lock_irqsave(&ehca_qp_idr_lock, flags);
 941         idr_remove(&ehca_qp_idr, my_qp->token);
 942         write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 943
 944 create_qp_exit0:
 945         kmem_cache_free(qp_cache, my_qp);
 946         atomic_dec(&shca->num_qps);
 947         return ERR_PTR(ret);
 948 }
 949
 950 struct ib_qp *ehca_create_qp(struct ib_pd *pd,
 951                              struct ib_qp_init_attr *qp_init_attr,
 952                              struct ib_udata *udata)
 953 {
 954         struct ehca_qp *ret;
 955
 956         ret = internal_create_qp(pd, qp_init_attr, NULL, udata, 0);
 957         return IS_ERR(ret) ? (struct ib_qp *)ret : &ret->ib_qp;
 958 }
 959
 960 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
 961                                struct ib_uobject *uobject);
 962
 963 struct ib_srq *ehca_create_srq(struct ib_pd *pd,
 964                                struct ib_srq_init_attr *srq_init_attr,
 965                                struct ib_udata *udata)
 966 {
 967         struct ib_qp_init_attr qp_init_attr;
 968         struct ehca_qp *my_qp;
 969         struct ib_srq *ret;
 970         struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
 971                                               ib_device);
 972         struct hcp_modify_qp_control_block *mqpcb;
 973         u64 hret, update_mask;
 974
 975         /* For common attributes, internal_create_qp() takes its info
 976          * out of qp_init_attr, so copy all common attrs there.
 977          */
 978         memset(&qp_init_attr, 0, sizeof(qp_init_attr));
 979         qp_init_attr.event_handler = srq_init_attr->event_handler;
 980         qp_init_attr.qp_context = srq_init_attr->srq_context;
 981         qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
 982         qp_init_attr.qp_type = IB_QPT_RC;
 983         qp_init_attr.cap.max_recv_wr = srq_init_attr->attr.max_wr;
 984         qp_init_attr.cap.max_recv_sge = srq_init_attr->attr.max_sge;
 985
 986         my_qp = internal_create_qp(pd, &qp_init_attr, srq_init_attr, udata, 1);
 987         if (IS_ERR(my_qp))
 988                 return (struct ib_srq *)my_qp;
 989
 990         /* copy back return values */
 991         srq_init_attr->attr.max_wr = qp_init_attr.cap.max_recv_wr;
 992         srq_init_attr->attr.max_sge = 3;
 993
 994         /* drive SRQ into RTR state */
 995         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 996         if (!mqpcb) {
 997                 ehca_err(pd->device, "Could not get zeroed page for mqpcb "
 998                          "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
 999                 ret = ERR_PTR(-ENOMEM);
1000                 goto create_srq1;
1001         }
1002
1003         mqpcb->qp_state = EHCA_QPS_INIT;
1004         mqpcb->prim_phys_port = 1;
1005         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1006         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
1007                                 my_qp->ipz_qp_handle,
1008                                 &my_qp->pf,
1009                                 update_mask,
1010                                 mqpcb, my_qp->galpas.kernel);
1011         if (hret != H_SUCCESS) {
1012                 ehca_err(pd->device, "Could not modify SRQ to INIT "
1013                          "ehca_qp=%p qp_num=%x h_ret=%li",
1014                          my_qp, my_qp->real_qp_num, hret);
1015                 goto create_srq2;
1016         }
1017
1018         mqpcb->qp_enable = 1;
1019         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
1020         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
1021                                 my_qp->ipz_qp_handle,
1022                                 &my_qp->pf,
1023                                 update_mask,
1024                                 mqpcb, my_qp->galpas.kernel);
1025         if (hret != H_SUCCESS) {
1026                 ehca_err(pd->device, "Could not enable SRQ "
1027                          "ehca_qp=%p qp_num=%x h_ret=%li",
1028                          my_qp, my_qp->real_qp_num, hret);
1029                 goto create_srq2;
1030         }
1031
1032         mqpcb->qp_state  = EHCA_QPS_RTR;
1033         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1034         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
1035                                 my_qp->ipz_qp_handle,
1036                                 &my_qp->pf,
1037                                 update_mask,
1038                                 mqpcb, my_qp->galpas.kernel);
1039         if (hret != H_SUCCESS) {
1040                 ehca_err(pd->device, "Could not modify SRQ to RTR "
1041                          "ehca_qp=%p qp_num=%x h_ret=%li",
1042                          my_qp, my_qp->real_qp_num, hret);
1043                 goto create_srq2;
1044         }
1045
1046         ehca_free_fw_ctrlblock(mqpcb);
1047
1048         return &my_qp->ib_srq;
1049
1050 create_srq2:
1051         ret = ERR_PTR(ehca2ib_return_code(hret));
1052         ehca_free_fw_ctrlblock(mqpcb);
1053
1054 create_srq1:
1055         internal_destroy_qp(pd->device, my_qp, my_qp->ib_srq.uobject);
1056
1057         return ret;
1058 }
1059
1060 /*
1061  * prepare_sqe_rts called by internal_modify_qp() at trans sqe -> rts
1062  * set purge bit of bad wqe and subsequent wqes to avoid reentering sqe
1063  * returns total number of bad wqes in bad_wqe_cnt
1064  */
1065 static int prepare_sqe_rts(struct ehca_qp *my_qp, struct ehca_shca *shca,
1066                            int *bad_wqe_cnt)
1067 {
1068         u64 h_ret;
1069         struct ipz_queue *squeue;
1070         void *bad_send_wqe_p, *bad_send_wqe_v;
1071         u64 q_ofs;
1072         struct ehca_wqe *wqe;
1073         int qp_num = my_qp->ib_qp.qp_num;
1074
1075         /* get send wqe pointer */
1076         h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
1077                                            my_qp->ipz_qp_handle, &my_qp->pf,
1078                                            &bad_send_wqe_p, NULL, 2);
1079         if (h_ret != H_SUCCESS) {
1080                 ehca_err(&shca->ib_device, "hipz_h_disable_and_get_wqe() failed"
1081                          " ehca_qp=%p qp_num=%x h_ret=%li",
1082                          my_qp, qp_num, h_ret);
1083                 return ehca2ib_return_code(h_ret);
1084         }
1085         bad_send_wqe_p = (void *)((u64)bad_send_wqe_p & (~(1L << 63)));
1086         ehca_dbg(&shca->ib_device, "qp_num=%x bad_send_wqe_p=%p",
1087                  qp_num, bad_send_wqe_p);
1088         /* convert wqe pointer to vadr */
1089         bad_send_wqe_v = abs_to_virt((u64)bad_send_wqe_p);
1090         if (ehca_debug_level >= 2)
1091                 ehca_dmp(bad_send_wqe_v, 32, "qp_num=%x bad_wqe", qp_num);
1092         squeue = &my_qp->ipz_squeue;
1093         if (ipz_queue_abs_to_offset(squeue, (u64)bad_send_wqe_p, &q_ofs)) {
1094                 ehca_err(&shca->ib_device, "failed to get wqe offset qp_num=%x"
1095                          " bad_send_wqe_p=%p", qp_num, bad_send_wqe_p);
1096                 return -EFAULT;
1097         }
1098
1099         /* loop sets wqe's purge bit */
1100         wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
1101         *bad_wqe_cnt = 0;
1102         while (wqe->optype != 0xff && wqe->wqef != 0xff) {
1103                 if (ehca_debug_level >= 2)
1104                         ehca_dmp(wqe, 32, "qp_num=%x wqe", qp_num);
1105                 wqe->nr_of_data_seg = 0; /* suppress data access */
1106                 wqe->wqef = WQEF_PURGE; /* WQE to be purged */
1107                 q_ofs = ipz_queue_advance_offset(squeue, q_ofs);
1108                 wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
1109                 *bad_wqe_cnt = (*bad_wqe_cnt)+1;
1110         }
1111         /*
1112          * bad wqe will be reprocessed and ignored when pol_cq() is called,
1113          *  i.e. nr of wqes with flush error status is one less
1114          */
1115         ehca_dbg(&shca->ib_device, "qp_num=%x flusherr_wqe_cnt=%x",
1116                  qp_num, (*bad_wqe_cnt)-1);
1117         wqe->wqef = 0;
1118
1119         return 0;
1120 }
1121
1122 static int calc_left_cqes(u64 wqe_p, struct ipz_queue *ipz_queue,
1123                           struct ehca_queue_map *qmap)
1124 {
1125         void *wqe_v;
1126         u64 q_ofs;
1127         u32 wqe_idx;
1128         unsigned int tail_idx;
1129
1130         /* convert real to abs address */
1131         wqe_p = wqe_p & (~(1UL << 63));
1132
1133         wqe_v = abs_to_virt(wqe_p);
1134
1135         if (ipz_queue_abs_to_offset(ipz_queue, wqe_p, &q_ofs)) {
1136                 ehca_gen_err("Invalid offset for calculating left cqes "
1137                                 "wqe_p=%#lx wqe_v=%p\n", wqe_p, wqe_v);
1138                 return -EFAULT;
1139         }
1140
1141         tail_idx = next_index(qmap->tail, qmap->entries);
1142         wqe_idx = q_ofs / ipz_queue->qe_size;
1143
1144         /* check all processed wqes, whether a cqe is requested or not */
1145         while (tail_idx != wqe_idx) {
1146                 if (qmap->map[tail_idx].cqe_req)
1147                         qmap->left_to_poll++;
1148                 tail_idx = next_index(tail_idx, qmap->entries);
1149         }
1150         /* save index in queue, where we have to start flushing */
1151         qmap->next_wqe_idx = wqe_idx;
1152         return 0;
1153 }
1154
1155 static int check_for_left_cqes(struct ehca_qp *my_qp, struct ehca_shca *shca)
1156 {
1157         u64 h_ret;
1158         void *send_wqe_p, *recv_wqe_p;
1159         int ret;
1160         unsigned long flags;
1161         int qp_num = my_qp->ib_qp.qp_num;
1162
1163         /* this hcall is not supported on base QPs */
1164         if (my_qp->ext_type != EQPT_SRQBASE) {
1165                 /* get send and receive wqe pointer */
1166                 h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
1167                                 my_qp->ipz_qp_handle, &my_qp->pf,
1168                                 &send_wqe_p, &recv_wqe_p, 4);
1169                 if (h_ret != H_SUCCESS) {
1170                         ehca_err(&shca->ib_device, "disable_and_get_wqe() "
1171                                  "failed ehca_qp=%p qp_num=%x h_ret=%li",
1172                                  my_qp, qp_num, h_ret);
1173                         return ehca2ib_return_code(h_ret);
1174                 }
1175
1176                 /*
1177                  * acquire lock to ensure that nobody is polling the cq which
1178                  * could mean that the qmap->tail pointer is in an
1179                  * inconsistent state.
1180                  */
1181                 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
1182                 ret = calc_left_cqes((u64)send_wqe_p, &my_qp->ipz_squeue,
1183                                 &my_qp->sq_map);
1184                 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
1185                 if (ret)
1186                         return ret;
1187
1188
1189                 spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
1190                 ret = calc_left_cqes((u64)recv_wqe_p, &my_qp->ipz_rqueue,
1191                                 &my_qp->rq_map);
1192                 spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
1193                 if (ret)
1194                         return ret;
1195         } else {
1196                 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
1197                 my_qp->sq_map.left_to_poll = 0;
1198                 my_qp->sq_map.next_wqe_idx = next_index(my_qp->sq_map.tail,
1199                                                         my_qp->sq_map.entries);
1200                 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
1201
1202                 spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
1203                 my_qp->rq_map.left_to_poll = 0;
1204                 my_qp->rq_map.next_wqe_idx = next_index(my_qp->rq_map.tail,
1205                                                         my_qp->rq_map.entries);
1206                 spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
1207         }
1208
1209         /* this assures flush cqes being generated only for pending wqes */
1210         if ((my_qp->sq_map.left_to_poll == 0) &&
1211                                 (my_qp->rq_map.left_to_poll == 0)) {
1212                 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
1213                 ehca_add_to_err_list(my_qp, 1);
1214                 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
1215
1216                 if (HAS_RQ(my_qp)) {
1217                         spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
1218                         ehca_add_to_err_list(my_qp, 0);
1219                         spin_unlock_irqrestore(&my_qp->recv_cq->spinlock,
1220                                         flags);
1221                 }
1222         }
1223
1224         return 0;
1225 }
1226
1227 /*
1228  * internal_modify_qp with circumvention to handle aqp0 properly
1229  * smi_reset2init indicates if this is an internal reset-to-init-call for
1230  * smi. This flag must always be zero if called from ehca_modify_qp()!
1231  * This internal func was intorduced to avoid recursion of ehca_modify_qp()!
1232  */
1233 static int internal_modify_qp(struct ib_qp *ibqp,
1234                               struct ib_qp_attr *attr,
1235                               int attr_mask, int smi_reset2init)
1236 {
1237         enum ib_qp_state qp_cur_state, qp_new_state;
1238         int cnt, qp_attr_idx, ret = 0;
1239         enum ib_qp_statetrans statetrans;
1240         struct hcp_modify_qp_control_block *mqpcb;
1241         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1242         struct ehca_shca *shca =
1243                 container_of(ibqp->pd->device, struct ehca_shca, ib_device);
1244         u64 update_mask;
1245         u64 h_ret;
1246         int bad_wqe_cnt = 0;
1247         int squeue_locked = 0;
1248         unsigned long flags = 0;
1249
1250         /* do query_qp to obtain current attr values */
1251         mqpcb = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
1252         if (!mqpcb) {
1253                 ehca_err(ibqp->device, "Could not get zeroed page for mqpcb "
1254                          "ehca_qp=%p qp_num=%x ", my_qp, ibqp->qp_num);
1255                 return -ENOMEM;
1256         }
1257
1258         h_ret = hipz_h_query_qp(shca->ipz_hca_handle,
1259                                 my_qp->ipz_qp_handle,
1260                                 &my_qp->pf,
1261                                 mqpcb, my_qp->galpas.kernel);
1262         if (h_ret != H_SUCCESS) {
1263                 ehca_err(ibqp->device, "hipz_h_query_qp() failed "
1264                          "ehca_qp=%p qp_num=%x h_ret=%li",
1265                          my_qp, ibqp->qp_num, h_ret);
1266                 ret = ehca2ib_return_code(h_ret);
1267                 goto modify_qp_exit1;
1268         }
1269
1270         qp_cur_state = ehca2ib_qp_state(mqpcb->qp_state);
1271
1272         if (qp_cur_state == -EINVAL) {  /* invalid qp state */
1273                 ret = -EINVAL;
1274                 ehca_err(ibqp->device, "Invalid current ehca_qp_state=%x "
1275                          "ehca_qp=%p qp_num=%x",
1276                          mqpcb->qp_state, my_qp, ibqp->qp_num);
1277                 goto modify_qp_exit1;
1278         }
1279         /*
1280          * circumvention to set aqp0 initial state to init
1281          * as expected by IB spec
1282          */
1283         if (smi_reset2init == 0 &&
1284             ibqp->qp_type == IB_QPT_SMI &&
1285             qp_cur_state == IB_QPS_RESET &&
1286             (attr_mask & IB_QP_STATE) &&
1287             attr->qp_state == IB_QPS_INIT) { /* RESET -> INIT */
1288                 struct ib_qp_attr smiqp_attr = {
1289                         .qp_state = IB_QPS_INIT,
1290                         .port_num = my_qp->init_attr.port_num,
1291                         .pkey_index = 0,
1292                         .qkey = 0
1293                 };
1294                 int smiqp_attr_mask = IB_QP_STATE | IB_QP_PORT |
1295                         IB_QP_PKEY_INDEX | IB_QP_QKEY;
1296                 int smirc = internal_modify_qp(
1297                         ibqp, &smiqp_attr, smiqp_attr_mask, 1);
1298                 if (smirc) {
1299                         ehca_err(ibqp->device, "SMI RESET -> INIT failed. "
1300                                  "ehca_modify_qp() rc=%i", smirc);
1301                         ret = H_PARAMETER;
1302                         goto modify_qp_exit1;
1303                 }
1304                 qp_cur_state = IB_QPS_INIT;
1305                 ehca_dbg(ibqp->device, "SMI RESET -> INIT succeeded");
1306         }
1307         /* is transmitted current state  equal to "real" current state */
1308         if ((attr_mask & IB_QP_CUR_STATE) &&
1309             qp_cur_state != attr->cur_qp_state) {
1310                 ret = -EINVAL;
1311                 ehca_err(ibqp->device,
1312                          "Invalid IB_QP_CUR_STATE attr->curr_qp_state=%x <>"
1313                          " actual cur_qp_state=%x. ehca_qp=%p qp_num=%x",
1314                          attr->cur_qp_state, qp_cur_state, my_qp, ibqp->qp_num);
1315                 goto modify_qp_exit1;
1316         }
1317
1318         ehca_dbg(ibqp->device, "ehca_qp=%p qp_num=%x current qp_state=%x "
1319                  "new qp_state=%x attribute_mask=%x",
1320                  my_qp, ibqp->qp_num, qp_cur_state, attr->qp_state, attr_mask);
1321
1322         qp_new_state = attr_mask & IB_QP_STATE ? attr->qp_state : qp_cur_state;
1323         if (!smi_reset2init &&
1324             !ib_modify_qp_is_ok(qp_cur_state, qp_new_state, ibqp->qp_type,
1325                                 attr_mask)) {
1326                 ret = -EINVAL;
1327                 ehca_err(ibqp->device,
1328                          "Invalid qp transition new_state=%x cur_state=%x "
1329                          "ehca_qp=%p qp_num=%x attr_mask=%x", qp_new_state,
1330                          qp_cur_state, my_qp, ibqp->qp_num, attr_mask);
1331                 goto modify_qp_exit1;
1332         }
1333
1334         mqpcb->qp_state = ib2ehca_qp_state(qp_new_state);
1335         if (mqpcb->qp_state)
1336                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1337         else {
1338                 ret = -EINVAL;
1339                 ehca_err(ibqp->device, "Invalid new qp state=%x "
1340                          "ehca_qp=%p qp_num=%x",
1341                          qp_new_state, my_qp, ibqp->qp_num);
1342                 goto modify_qp_exit1;
1343         }
1344
1345         /* retrieve state transition struct to get req and opt attrs */
1346         statetrans = get_modqp_statetrans(qp_cur_state, qp_new_state);
1347         if (statetrans < 0) {
1348                 ret = -EINVAL;
1349                 ehca_err(ibqp->device, "<INVALID STATE CHANGE> qp_cur_state=%x "
1350                          "new_qp_state=%x State_xsition=%x ehca_qp=%p "
1351                          "qp_num=%x", qp_cur_state, qp_new_state,
1352                          statetrans, my_qp, ibqp->qp_num);
1353                 goto modify_qp_exit1;
1354         }
1355
1356         qp_attr_idx = ib2ehcaqptype(ibqp->qp_type);
1357
1358         if (qp_attr_idx < 0) {
1359                 ret = qp_attr_idx;
1360                 ehca_err(ibqp->device,
1361                          "Invalid QP type=%x ehca_qp=%p qp_num=%x",
1362                          ibqp->qp_type, my_qp, ibqp->qp_num);
1363                 goto modify_qp_exit1;
1364         }
1365
1366         ehca_dbg(ibqp->device,
1367                  "ehca_qp=%p qp_num=%x <VALID STATE CHANGE> qp_state_xsit=%x",
1368                  my_qp, ibqp->qp_num, statetrans);
1369
1370         /* eHCA2 rev2 and higher require the SEND_GRH_FLAG to be set
1371          * in non-LL UD QPs.
1372          */
1373         if ((my_qp->qp_type == IB_QPT_UD) &&
1374             (my_qp->ext_type != EQPT_LLQP) &&
1375             (statetrans == IB_QPST_INIT2RTR) &&
1376             (shca->hw_level >= 0x22)) {
1377                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1378                 mqpcb->send_grh_flag = 1;
1379         }
1380
1381         /* sqe -> rts: set purge bit of bad wqe before actual trans */
1382         if ((my_qp->qp_type == IB_QPT_UD ||
1383              my_qp->qp_type == IB_QPT_GSI ||
1384              my_qp->qp_type == IB_QPT_SMI) &&
1385             statetrans == IB_QPST_SQE2RTS) {
1386                 /* mark next free wqe if kernel */
1387                 if (!ibqp->uobject) {
1388                         struct ehca_wqe *wqe;
1389                         /* lock send queue */
1390                         spin_lock_irqsave(&my_qp->spinlock_s, flags);
1391                         squeue_locked = 1;
1392                         /* mark next free wqe */
1393                         wqe = (struct ehca_wqe *)
1394                                 ipz_qeit_get(&my_qp->ipz_squeue);
1395                         wqe->optype = wqe->wqef = 0xff;
1396                         ehca_dbg(ibqp->device, "qp_num=%x next_free_wqe=%p",
1397                                  ibqp->qp_num, wqe);
1398                 }
1399                 ret = prepare_sqe_rts(my_qp, shca, &bad_wqe_cnt);
1400                 if (ret) {
1401                         ehca_err(ibqp->device, "prepare_sqe_rts() failed "
1402                                  "ehca_qp=%p qp_num=%x ret=%i",
1403                                  my_qp, ibqp->qp_num, ret);
1404                         goto modify_qp_exit2;
1405                 }
1406         }
1407
1408         /*
1409          * enable RDMA_Atomic_Control if reset->init und reliable con
1410          * this is necessary since gen2 does not provide that flag,
1411          * but pHyp requires it
1412          */
1413         if (statetrans == IB_QPST_RESET2INIT &&
1414             (ibqp->qp_type == IB_QPT_RC || ibqp->qp_type == IB_QPT_UC)) {
1415                 mqpcb->rdma_atomic_ctrl = 3;
1416                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RDMA_ATOMIC_CTRL, 1);
1417         }
1418         /* circ. pHyp requires #RDMA/Atomic Resp Res for UC INIT -> RTR */
1419         if (statetrans == IB_QPST_INIT2RTR &&
1420             (ibqp->qp_type == IB_QPT_UC) &&
1421             !(attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)) {
1422                 mqpcb->rdma_nr_atomic_resp_res = 1; /* default to 1 */
1423                 update_mask |=
1424                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1425         }
1426
1427         if (attr_mask & IB_QP_PKEY_INDEX) {
1428                 if (attr->pkey_index >= 16) {
1429                         ret = -EINVAL;
1430                         ehca_err(ibqp->device, "Invalid pkey_index=%x. "
1431                                  "ehca_qp=%p qp_num=%x max_pkey_index=f",
1432                                  attr->pkey_index, my_qp, ibqp->qp_num);
1433                         goto modify_qp_exit2;
1434                 }
1435                 mqpcb->prim_p_key_idx = attr->pkey_index;
1436                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_P_KEY_IDX, 1);
1437         }
1438         if (attr_mask & IB_QP_PORT) {
1439                 struct ehca_sport *sport;
1440                 struct ehca_qp *aqp1;
1441                 if (attr->port_num < 1 || attr->port_num > shca->num_ports) {
1442                         ret = -EINVAL;
1443                         ehca_err(ibqp->device, "Invalid port=%x. "
1444                                  "ehca_qp=%p qp_num=%x num_ports=%x",
1445                                  attr->port_num, my_qp, ibqp->qp_num,
1446                                  shca->num_ports);
1447                         goto modify_qp_exit2;
1448                 }
1449                 sport = &shca->sport[attr->port_num - 1];
1450                 if (!sport->ibqp_sqp[IB_QPT_GSI]) {
1451                         /* should not occur */
1452                         ret = -EFAULT;
1453                         ehca_err(ibqp->device, "AQP1 was not created for "
1454                                  "port=%x", attr->port_num);
1455                         goto modify_qp_exit2;
1456                 }
1457                 aqp1 = container_of(sport->ibqp_sqp[IB_QPT_GSI],
1458                                     struct ehca_qp, ib_qp);
1459                 if (ibqp->qp_type != IB_QPT_GSI &&
1460                     ibqp->qp_type != IB_QPT_SMI &&
1461                     aqp1->mod_qp_parm) {
1462                         /*
1463                          * firmware will reject this modify_qp() because
1464                          * port is not activated/initialized fully
1465                          */
1466                         ret = -EFAULT;
1467                         ehca_warn(ibqp->device, "Couldn't modify qp port=%x: "
1468                                   "either port is being activated (try again) "
1469                                   "or cabling issue", attr->port_num);
1470                         goto modify_qp_exit2;
1471                 }
1472                 mqpcb->prim_phys_port = attr->port_num;
1473                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_PHYS_PORT, 1);
1474         }
1475         if (attr_mask & IB_QP_QKEY) {
1476                 mqpcb->qkey = attr->qkey;
1477                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_QKEY, 1);
1478         }
1479         if (attr_mask & IB_QP_AV) {
1480                 mqpcb->dlid = attr->ah_attr.dlid;
1481                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DLID, 1);
1482                 mqpcb->source_path_bits = attr->ah_attr.src_path_bits;
1483                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS, 1);
1484                 mqpcb->service_level = attr->ah_attr.sl;
1485                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL, 1);
1486
1487                 if (ehca_calc_ipd(shca, mqpcb->prim_phys_port,
1488                                   attr->ah_attr.static_rate,
1489                                   &mqpcb->max_static_rate)) {
1490                         ret = -EINVAL;
1491                         goto modify_qp_exit2;
1492                 }
1493                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE, 1);
1494
1495                 /*
1496                  * Always supply the GRH flag, even if it's zero, to give the
1497                  * hypervisor a clear "yes" or "no" instead of a "perhaps"
1498                  */
1499                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1500
1501                 /*
1502                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
1503                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1504                  */
1505                 if (attr->ah_attr.ah_flags == IB_AH_GRH) {
1506                         mqpcb->send_grh_flag = 1;
1507
1508                         mqpcb->source_gid_idx = attr->ah_attr.grh.sgid_index;
1509                         update_mask |=
1510                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX, 1);
1511
1512                         for (cnt = 0; cnt < 16; cnt++)
1513                                 mqpcb->dest_gid.byte[cnt] =
1514                                         attr->ah_attr.grh.dgid.raw[cnt];
1515
1516                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_GID, 1);
1517                         mqpcb->flow_label = attr->ah_attr.grh.flow_label;
1518                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL, 1);
1519                         mqpcb->hop_limit = attr->ah_attr.grh.hop_limit;
1520                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT, 1);
1521                         mqpcb->traffic_class = attr->ah_attr.grh.traffic_class;
1522                         update_mask |=
1523                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS, 1);
1524                 }
1525         }
1526
1527         if (attr_mask & IB_QP_PATH_MTU) {
1528                 /* store ld(MTU) */
1529                 my_qp->mtu_shift = attr->path_mtu + 7;
1530                 mqpcb->path_mtu = attr->path_mtu;
1531                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PATH_MTU, 1);
1532         }
1533         if (attr_mask & IB_QP_TIMEOUT) {
1534                 mqpcb->timeout = attr->timeout;
1535                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT, 1);
1536         }
1537         if (attr_mask & IB_QP_RETRY_CNT) {
1538                 mqpcb->retry_count = attr->retry_cnt;
1539                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT, 1);
1540         }
1541         if (attr_mask & IB_QP_RNR_RETRY) {
1542                 mqpcb->rnr_retry_count = attr->rnr_retry;
1543                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT, 1);
1544         }
1545         if (attr_mask & IB_QP_RQ_PSN) {
1546                 mqpcb->receive_psn = attr->rq_psn;
1547                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RECEIVE_PSN, 1);
1548         }
1549         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1550                 mqpcb->rdma_nr_atomic_resp_res = attr->max_dest_rd_atomic < 3 ?
1551                         attr->max_dest_rd_atomic : 2;
1552                 update_mask |=
1553                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1554         }
1555         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1556                 mqpcb->rdma_atomic_outst_dest_qp = attr->max_rd_atomic < 3 ?
1557                         attr->max_rd_atomic : 2;
1558                 update_mask |=
1559                         EHCA_BMASK_SET
1560                         (MQPCB_MASK_RDMA_ATOMIC_OUTST_DEST_QP, 1);
1561         }
1562         if (attr_mask & IB_QP_ALT_PATH) {
1563                 if (attr->alt_port_num < 1
1564                     || attr->alt_port_num > shca->num_ports) {
1565                         ret = -EINVAL;
1566                         ehca_err(ibqp->device, "Invalid alt_port=%x. "
1567                                  "ehca_qp=%p qp_num=%x num_ports=%x",
1568                                  attr->alt_port_num, my_qp, ibqp->qp_num,
1569                                  shca->num_ports);
1570                         goto modify_qp_exit2;
1571                 }
1572                 mqpcb->alt_phys_port = attr->alt_port_num;
1573
1574                 if (attr->alt_pkey_index >= 16) {
1575                         ret = -EINVAL;
1576                         ehca_err(ibqp->device, "Invalid alt_pkey_index=%x. "
1577                                  "ehca_qp=%p qp_num=%x max_pkey_index=f",
1578                                  attr->pkey_index, my_qp, ibqp->qp_num);
1579                         goto modify_qp_exit2;
1580                 }
1581                 mqpcb->alt_p_key_idx = attr->alt_pkey_index;
1582
1583                 mqpcb->timeout_al = attr->alt_timeout;
1584                 mqpcb->dlid_al = attr->alt_ah_attr.dlid;
1585                 mqpcb->source_path_bits_al = attr->alt_ah_attr.src_path_bits;
1586                 mqpcb->service_level_al = attr->alt_ah_attr.sl;
1587
1588                 if (ehca_calc_ipd(shca, mqpcb->alt_phys_port,
1589                                   attr->alt_ah_attr.static_rate,
1590                                   &mqpcb->max_static_rate_al)) {
1591                         ret = -EINVAL;
1592                         goto modify_qp_exit2;
1593                 }
1594
1595                 /* OpenIB doesn't support alternate retry counts - copy them */
1596                 mqpcb->retry_count_al = mqpcb->retry_count;
1597                 mqpcb->rnr_retry_count_al = mqpcb->rnr_retry_count;
1598
1599                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_ALT_PHYS_PORT, 1)
1600                         | EHCA_BMASK_SET(MQPCB_MASK_ALT_P_KEY_IDX, 1)
1601                         | EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT_AL, 1)
1602                         | EHCA_BMASK_SET(MQPCB_MASK_DLID_AL, 1)
1603                         | EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS_AL, 1)
1604                         | EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL_AL, 1)
1605                         | EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE_AL, 1)
1606                         | EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT_AL, 1)
1607                         | EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT_AL, 1);
1608
1609                 /*
1610                  * Always supply the GRH flag, even if it's zero, to give the
1611                  * hypervisor a clear "yes" or "no" instead of a "perhaps"
1612                  */
1613                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG_AL, 1);
1614
1615                 /*
1616                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
1617                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1618                  */
1619                 if (attr->alt_ah_attr.ah_flags == IB_AH_GRH) {
1620                         mqpcb->send_grh_flag_al = 1;
1621
1622                         for (cnt = 0; cnt < 16; cnt++)
1623                                 mqpcb->dest_gid_al.byte[cnt] =
1624                                         attr->alt_ah_attr.grh.dgid.raw[cnt];
1625                         mqpcb->source_gid_idx_al =
1626                                 attr->alt_ah_attr.grh.sgid_index;
1627                         mqpcb->flow_label_al = attr->alt_ah_attr.grh.flow_label;
1628                         mqpcb->hop_limit_al = attr->alt_ah_attr.grh.hop_limit;
1629                         mqpcb->traffic_class_al =
1630                                 attr->alt_ah_attr.grh.traffic_class;
1631
1632                         update_mask |=
1633                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX_AL, 1)
1634                                 | EHCA_BMASK_SET(MQPCB_MASK_DEST_GID_AL, 1)
1635                                 | EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL_AL, 1)
1636                                 | EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT_AL, 1) |
1637                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS_AL, 1);
1638                 }
1639         }
1640
1641         if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1642                 mqpcb->min_rnr_nak_timer_field = attr->min_rnr_timer;
1643                 update_mask |=
1644                         EHCA_BMASK_SET(MQPCB_MASK_MIN_RNR_NAK_TIMER_FIELD, 1);
1645         }
1646
1647         if (attr_mask & IB_QP_SQ_PSN) {
1648                 mqpcb->send_psn = attr->sq_psn;
1649                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_PSN, 1);
1650         }
1651
1652         if (attr_mask & IB_QP_DEST_QPN) {
1653                 mqpcb->dest_qp_nr = attr->dest_qp_num;
1654                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_QP_NR, 1);
1655         }
1656
1657         if (attr_mask & IB_QP_PATH_MIG_STATE) {
1658                 if (attr->path_mig_state != IB_MIG_REARM
1659                     && attr->path_mig_state != IB_MIG_MIGRATED) {
1660                         ret = -EINVAL;
1661                         ehca_err(ibqp->device, "Invalid mig_state=%x",
1662                                  attr->path_mig_state);
1663                         goto modify_qp_exit2;
1664                 }
1665                 mqpcb->path_migration_state = attr->path_mig_state + 1;
1666                 if (attr->path_mig_state == IB_MIG_REARM)
1667                         my_qp->mig_armed = 1;
1668                 update_mask |=
1669                         EHCA_BMASK_SET(MQPCB_MASK_PATH_MIGRATION_STATE, 1);
1670         }
1671
1672         if (attr_mask & IB_QP_CAP) {
1673                 mqpcb->max_nr_outst_send_wr = attr->cap.max_send_wr+1;
1674                 update_mask |=
1675                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_SEND_WR, 1);
1676                 mqpcb->max_nr_outst_recv_wr = attr->cap.max_recv_wr+1;
1677                 update_mask |=
1678                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_RECV_WR, 1);
1679                 /* no support for max_send/recv_sge yet */
1680         }
1681
1682         if (ehca_debug_level >= 2)
1683                 ehca_dmp(mqpcb, 4*70, "qp_num=%x", ibqp->qp_num);
1684
1685         h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1686                                  my_qp->ipz_qp_handle,
1687                                  &my_qp->pf,
1688                                  update_mask,
1689                                  mqpcb, my_qp->galpas.kernel);
1690
1691         if (h_ret != H_SUCCESS) {
1692                 ret = ehca2ib_return_code(h_ret);
1693                 ehca_err(ibqp->device, "hipz_h_modify_qp() failed h_ret=%li "
1694                          "ehca_qp=%p qp_num=%x", h_ret, my_qp, ibqp->qp_num);
1695                 goto modify_qp_exit2;
1696         }
1697
1698         if ((my_qp->qp_type == IB_QPT_UD ||
1699              my_qp->qp_type == IB_QPT_GSI ||
1700              my_qp->qp_type == IB_QPT_SMI) &&
1701             statetrans == IB_QPST_SQE2RTS) {
1702                 /* doorbell to reprocessing wqes */
1703                 iosync(); /* serialize GAL register access */
1704                 hipz_update_sqa(my_qp, bad_wqe_cnt-1);
1705                 ehca_gen_dbg("doorbell for %x wqes", bad_wqe_cnt);
1706         }
1707
1708         if (statetrans == IB_QPST_RESET2INIT ||
1709             statetrans == IB_QPST_INIT2INIT) {
1710                 mqpcb->qp_enable = 1;
1711                 mqpcb->qp_state = EHCA_QPS_INIT;
1712                 update_mask = 0;
1713                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
1714
1715                 h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1716                                          my_qp->ipz_qp_handle,
1717                                          &my_qp->pf,
1718                                          update_mask,
1719                                          mqpcb,
1720                                          my_qp->galpas.kernel);
1721
1722                 if (h_ret != H_SUCCESS) {
1723                         ret = ehca2ib_return_code(h_ret);
1724                         ehca_err(ibqp->device, "ENABLE in context of "
1725                                  "RESET_2_INIT failed! Maybe you didn't get "
1726                                  "a LID h_ret=%li ehca_qp=%p qp_num=%x",
1727                                  h_ret, my_qp, ibqp->qp_num);
1728                         goto modify_qp_exit2;
1729                 }
1730         }
1731         if ((qp_new_state == IB_QPS_ERR) && (qp_cur_state != IB_QPS_ERR)) {
1732                 ret = check_for_left_cqes(my_qp, shca);
1733                 if (ret)
1734                         goto modify_qp_exit2;
1735         }
1736
1737         if (statetrans == IB_QPST_ANY2RESET) {
1738                 ipz_qeit_reset(&my_qp->ipz_rqueue);
1739                 ipz_qeit_reset(&my_qp->ipz_squeue);
1740
1741                 if (qp_cur_state == IB_QPS_ERR) {
1742                         del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
1743
1744                         if (HAS_RQ(my_qp))
1745                                 del_from_err_list(my_qp->recv_cq,
1746                                                   &my_qp->rq_err_node);
1747                 }
1748                 reset_queue_map(&my_qp->sq_map);
1749
1750                 if (HAS_RQ(my_qp))
1751                         reset_queue_map(&my_qp->rq_map);
1752         }
1753
1754         if (attr_mask & IB_QP_QKEY)
1755                 my_qp->qkey = attr->qkey;
1756
1757 modify_qp_exit2:
1758         if (squeue_locked) { /* this means: sqe -> rts */
1759                 spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
1760                 my_qp->sqerr_purgeflag = 1;
1761         }
1762
1763 modify_qp_exit1:
1764         ehca_free_fw_ctrlblock(mqpcb);
1765
1766         return ret;
1767 }
1768
1769 int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
1770                    struct ib_udata *udata)
1771 {
1772         int ret = 0;
1773
1774         struct ehca_shca *shca = container_of(ibqp->device, struct ehca_shca,
1775                                               ib_device);
1776         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1777
1778         /* The if-block below caches qp_attr to be modified for GSI and SMI
1779          * qps during the initialization by ib_mad. When the respective port
1780          * is activated, ie we got an event PORT_ACTIVE, we'll replay the
1781          * cached modify calls sequence, see ehca_recover_sqs() below.
1782          * Why that is required:
1783          * 1) If one port is connected, older code requires that port one
1784          *    to be connected and module option nr_ports=1 to be given by
1785          *    user, which is very inconvenient for end user.
1786          * 2) Firmware accepts modify_qp() only if respective port has become
1787          *    active. Older code had a wait loop of 30sec create_qp()/
1788          *    define_aqp1(), which is not appropriate in practice. This
1789          *    code now removes that wait loop, see define_aqp1(), and always
1790          *    reports all ports to ib_mad resp. users. Only activated ports
1791          *    will then usable for the users.
1792          */
1793         if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) {
1794                 int port = my_qp->init_attr.port_num;
1795                 struct ehca_sport *sport = &shca->sport[port - 1];
1796                 unsigned long flags;
1797                 spin_lock_irqsave(&sport->mod_sqp_lock, flags);
1798                 /* cache qp_attr only during init */
1799                 if (my_qp->mod_qp_parm) {
1800                         struct ehca_mod_qp_parm *p;
1801                         if (my_qp->mod_qp_parm_idx >= EHCA_MOD_QP_PARM_MAX) {
1802                                 ehca_err(&shca->ib_device,
1803                                          "mod_qp_parm overflow state=%x port=%x"
1804                                          " type=%x", attr->qp_state,
1805                                          my_qp->init_attr.port_num,
1806                                          ibqp->qp_type);
1807                                 spin_unlock_irqrestore(&sport->mod_sqp_lock,
1808                                                        flags);
1809                                 return -EINVAL;
1810                         }
1811                         p = &my_qp->mod_qp_parm[my_qp->mod_qp_parm_idx];
1812                         p->mask = attr_mask;
1813                         p->attr = *attr;
1814                         my_qp->mod_qp_parm_idx++;
1815                         ehca_dbg(&shca->ib_device,
1816                                  "Saved qp_attr for state=%x port=%x type=%x",
1817                                  attr->qp_state, my_qp->init_attr.port_num,
1818                                  ibqp->qp_type);
1819                         spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
1820                         goto out;
1821                 }
1822                 spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
1823         }
1824
1825         ret = internal_modify_qp(ibqp, attr, attr_mask, 0);
1826
1827 out:
1828         if ((ret == 0) && (attr_mask & IB_QP_STATE))
1829                 my_qp->state = attr->qp_state;
1830
1831         return ret;
1832 }
1833
1834 void ehca_recover_sqp(struct ib_qp *sqp)
1835 {
1836         struct ehca_qp *my_sqp = container_of(sqp, struct ehca_qp, ib_qp);
1837         int port = my_sqp->init_attr.port_num;
1838         struct ib_qp_attr attr;
1839         struct ehca_mod_qp_parm *qp_parm;
1840         int i, qp_parm_idx, ret;
1841         unsigned long flags, wr_cnt;
1842
1843         if (!my_sqp->mod_qp_parm)
1844                 return;
1845         ehca_dbg(sqp->device, "SQP port=%x qp_num=%x", port, sqp->qp_num);
1846
1847         qp_parm = my_sqp->mod_qp_parm;
1848         qp_parm_idx = my_sqp->mod_qp_parm_idx;
1849         for (i = 0; i < qp_parm_idx; i++) {
1850                 attr = qp_parm[i].attr;
1851                 ret = internal_modify_qp(sqp, &attr, qp_parm[i].mask, 0);
1852                 if (ret) {
1853                         ehca_err(sqp->device, "Could not modify SQP port=%x "
1854                                  "qp_num=%x ret=%x", port, sqp->qp_num, ret);
1855                         goto free_qp_parm;
1856                 }
1857                 ehca_dbg(sqp->device, "SQP port=%x qp_num=%x in state=%x",
1858                          port, sqp->qp_num, attr.qp_state);
1859         }
1860
1861         /* re-trigger posted recv wrs */
1862         wr_cnt =  my_sqp->ipz_rqueue.current_q_offset /
1863                 my_sqp->ipz_rqueue.qe_size;
1864         if (wr_cnt) {
1865                 spin_lock_irqsave(&my_sqp->spinlock_r, flags);
1866                 hipz_update_rqa(my_sqp, wr_cnt);
1867                 spin_unlock_irqrestore(&my_sqp->spinlock_r, flags);
1868                 ehca_dbg(sqp->device, "doorbell port=%x qp_num=%x wr_cnt=%lx",
1869                          port, sqp->qp_num, wr_cnt);
1870         }
1871
1872 free_qp_parm:
1873         kfree(qp_parm);
1874         /* this prevents subsequent calls to modify_qp() to cache qp_attr */
1875         my_sqp->mod_qp_parm = NULL;
1876 }
1877
1878 int ehca_query_qp(struct ib_qp *qp,
1879                   struct ib_qp_attr *qp_attr,
1880                   int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
1881 {
1882         struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
1883         struct ehca_shca *shca = container_of(qp->device, struct ehca_shca,
1884                                               ib_device);
1885         struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
1886         struct hcp_modify_qp_control_block *qpcb;
1887         int cnt, ret = 0;
1888         u64 h_ret;
1889
1890         if (qp_attr_mask & QP_ATTR_QUERY_NOT_SUPPORTED) {
1891                 ehca_err(qp->device, "Invalid attribute mask "
1892                          "ehca_qp=%p qp_num=%x qp_attr_mask=%x ",
1893                          my_qp, qp->qp_num, qp_attr_mask);
1894                 return -EINVAL;
1895         }
1896
1897         qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1898         if (!qpcb) {
1899                 ehca_err(qp->device, "Out of memory for qpcb "
1900                          "ehca_qp=%p qp_num=%x", my_qp, qp->qp_num);
1901                 return -ENOMEM;
1902         }
1903
1904         h_ret = hipz_h_query_qp(adapter_handle,
1905                                 my_qp->ipz_qp_handle,
1906                                 &my_qp->pf,
1907                                 qpcb, my_qp->galpas.kernel);
1908
1909         if (h_ret != H_SUCCESS) {
1910                 ret = ehca2ib_return_code(h_ret);
1911                 ehca_err(qp->device, "hipz_h_query_qp() failed "
1912                          "ehca_qp=%p qp_num=%x h_ret=%li",
1913                          my_qp, qp->qp_num, h_ret);
1914                 goto query_qp_exit1;
1915         }
1916
1917         qp_attr->cur_qp_state = ehca2ib_qp_state(qpcb->qp_state);
1918         qp_attr->qp_state = qp_attr->cur_qp_state;
1919
1920         if (qp_attr->cur_qp_state == -EINVAL) {
1921                 ret = -EINVAL;
1922                 ehca_err(qp->device, "Got invalid ehca_qp_state=%x "
1923                          "ehca_qp=%p qp_num=%x",
1924                          qpcb->qp_state, my_qp, qp->qp_num);
1925                 goto query_qp_exit1;
1926         }
1927
1928         if (qp_attr->qp_state == IB_QPS_SQD)
1929                 qp_attr->sq_draining = 1;
1930
1931         qp_attr->qkey = qpcb->qkey;
1932         qp_attr->path_mtu = qpcb->path_mtu;
1933         qp_attr->path_mig_state = qpcb->path_migration_state - 1;
1934         qp_attr->rq_psn = qpcb->receive_psn;
1935         qp_attr->sq_psn = qpcb->send_psn;
1936         qp_attr->min_rnr_timer = qpcb->min_rnr_nak_timer_field;
1937         qp_attr->cap.max_send_wr = qpcb->max_nr_outst_send_wr-1;
1938         qp_attr->cap.max_recv_wr = qpcb->max_nr_outst_recv_wr-1;
1939         /* UD_AV CIRCUMVENTION */
1940         if (my_qp->qp_type == IB_QPT_UD) {
1941                 qp_attr->cap.max_send_sge =
1942                         qpcb->actual_nr_sges_in_sq_wqe - 2;
1943                 qp_attr->cap.max_recv_sge =
1944                         qpcb->actual_nr_sges_in_rq_wqe - 2;
1945         } else {
1946                 qp_attr->cap.max_send_sge =
1947                         qpcb->actual_nr_sges_in_sq_wqe;
1948                 qp_attr->cap.max_recv_sge =
1949                         qpcb->actual_nr_sges_in_rq_wqe;
1950         }
1951
1952         qp_attr->cap.max_inline_data = my_qp->sq_max_inline_data_size;
1953         qp_attr->dest_qp_num = qpcb->dest_qp_nr;
1954
1955         qp_attr->pkey_index =
1956                 EHCA_BMASK_GET(MQPCB_PRIM_P_KEY_IDX, qpcb->prim_p_key_idx);
1957
1958         qp_attr->port_num =
1959                 EHCA_BMASK_GET(MQPCB_PRIM_PHYS_PORT, qpcb->prim_phys_port);
1960
1961         qp_attr->timeout = qpcb->timeout;
1962         qp_attr->retry_cnt = qpcb->retry_count;
1963         qp_attr->rnr_retry = qpcb->rnr_retry_count;
1964
1965         qp_attr->alt_pkey_index =
1966                 EHCA_BMASK_GET(MQPCB_PRIM_P_KEY_IDX, qpcb->alt_p_key_idx);
1967
1968         qp_attr->alt_port_num = qpcb->alt_phys_port;
1969         qp_attr->alt_timeout = qpcb->timeout_al;
1970
1971         qp_attr->max_dest_rd_atomic = qpcb->rdma_nr_atomic_resp_res;
1972         qp_attr->max_rd_atomic = qpcb->rdma_atomic_outst_dest_qp;
1973
1974         /* primary av */
1975         qp_attr->ah_attr.sl = qpcb->service_level;
1976
1977         if (qpcb->send_grh_flag) {
1978                 qp_attr->ah_attr.ah_flags = IB_AH_GRH;
1979         }
1980
1981         qp_attr->ah_attr.static_rate = qpcb->max_static_rate;
1982         qp_attr->ah_attr.dlid = qpcb->dlid;
1983         qp_attr->ah_attr.src_path_bits = qpcb->source_path_bits;
1984         qp_attr->ah_attr.port_num = qp_attr->port_num;
1985
1986         /* primary GRH */
1987         qp_attr->ah_attr.grh.traffic_class = qpcb->traffic_class;
1988         qp_attr->ah_attr.grh.hop_limit = qpcb->hop_limit;
1989         qp_attr->ah_attr.grh.sgid_index = qpcb->source_gid_idx;
1990         qp_attr->ah_attr.grh.flow_label = qpcb->flow_label;
1991
1992         for (cnt = 0; cnt < 16; cnt++)
1993                 qp_attr->ah_attr.grh.dgid.raw[cnt] =
1994                         qpcb->dest_gid.byte[cnt];
1995
1996         /* alternate AV */
1997         qp_attr->alt_ah_attr.sl = qpcb->service_level_al;
1998         if (qpcb->send_grh_flag_al) {
1999                 qp_attr->alt_ah_attr.ah_flags = IB_AH_GRH;
2000         }
2001
2002         qp_attr->alt_ah_attr.static_rate = qpcb->max_static_rate_al;
2003         qp_attr->alt_ah_attr.dlid = qpcb->dlid_al;
2004         qp_attr->alt_ah_attr.src_path_bits = qpcb->source_path_bits_al;
2005
2006         /* alternate GRH */
2007         qp_attr->alt_ah_attr.grh.traffic_class = qpcb->traffic_class_al;
2008         qp_attr->alt_ah_attr.grh.hop_limit = qpcb->hop_limit_al;
2009         qp_attr->alt_ah_attr.grh.sgid_index = qpcb->source_gid_idx_al;
2010         qp_attr->alt_ah_attr.grh.flow_label = qpcb->flow_label_al;
2011
2012         for (cnt = 0; cnt < 16; cnt++)
2013                 qp_attr->alt_ah_attr.grh.dgid.raw[cnt] =
2014                         qpcb->dest_gid_al.byte[cnt];
2015
2016         /* return init attributes given in ehca_create_qp */
2017         if (qp_init_attr)
2018                 *qp_init_attr = my_qp->init_attr;
2019
2020         if (ehca_debug_level >= 2)
2021                 ehca_dmp(qpcb, 4*70, "qp_num=%x", qp->qp_num);
2022
2023 query_qp_exit1:
2024         ehca_free_fw_ctrlblock(qpcb);
2025
2026         return ret;
2027 }
2028
2029 int ehca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
2030                     enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
2031 {
2032         struct ehca_qp *my_qp =
2033                 container_of(ibsrq, struct ehca_qp, ib_srq);
2034         struct ehca_shca *shca =
2035                 container_of(ibsrq->pd->device, struct ehca_shca, ib_device);
2036         struct hcp_modify_qp_control_block *mqpcb;
2037         u64 update_mask;
2038         u64 h_ret;
2039         int ret = 0;
2040
2041         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
2042         if (!mqpcb) {
2043                 ehca_err(ibsrq->device, "Could not get zeroed page for mqpcb "
2044                          "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
2045                 return -ENOMEM;
2046         }
2047
2048         update_mask = 0;
2049         if (attr_mask & IB_SRQ_LIMIT) {
2050                 attr_mask &= ~IB_SRQ_LIMIT;
2051                 update_mask |=
2052                         EHCA_BMASK_SET(MQPCB_MASK_CURR_SRQ_LIMIT, 1)
2053                         | EHCA_BMASK_SET(MQPCB_MASK_QP_AFF_ASYN_EV_LOG_REG, 1);
2054                 mqpcb->curr_srq_limit =
2055                         EHCA_BMASK_SET(MQPCB_CURR_SRQ_LIMIT, attr->srq_limit);
2056                 mqpcb->qp_aff_asyn_ev_log_reg =
2057                         EHCA_BMASK_SET(QPX_AAELOG_RESET_SRQ_LIMIT, 1);
2058         }
2059
2060         /* by now, all bits in attr_mask should have been cleared */
2061         if (attr_mask) {
2062                 ehca_err(ibsrq->device, "invalid attribute mask bits set  "
2063                          "attr_mask=%x", attr_mask);
2064                 ret = -EINVAL;
2065                 goto modify_srq_exit0;
2066         }
2067
2068         if (ehca_debug_level >= 2)
2069                 ehca_dmp(mqpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
2070
2071         h_ret = hipz_h_modify_qp(shca->ipz_hca_handle, my_qp->ipz_qp_handle,
2072                                  NULL, update_mask, mqpcb,
2073                                  my_qp->galpas.kernel);
2074
2075         if (h_ret != H_SUCCESS) {
2076                 ret = ehca2ib_return_code(h_ret);
2077                 ehca_err(ibsrq->device, "hipz_h_modify_qp() failed h_ret=%li "
2078                          "ehca_qp=%p qp_num=%x",
2079                          h_ret, my_qp, my_qp->real_qp_num);
2080         }
2081
2082 modify_srq_exit0:
2083         ehca_free_fw_ctrlblock(mqpcb);
2084
2085         return ret;
2086 }
2087
2088 int ehca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr)
2089 {
2090         struct ehca_qp *my_qp = container_of(srq, struct ehca_qp, ib_srq);
2091         struct ehca_shca *shca = container_of(srq->device, struct ehca_shca,
2092                                               ib_device);
2093         struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
2094         struct hcp_modify_qp_control_block *qpcb;
2095         int ret = 0;
2096         u64 h_ret;
2097
2098         qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
2099         if (!qpcb) {
2100                 ehca_err(srq->device, "Out of memory for qpcb "
2101                          "ehca_qp=%p qp_num=%x", my_qp, my_qp->real_qp_num);
2102                 return -ENOMEM;
2103         }
2104
2105         h_ret = hipz_h_query_qp(adapter_handle, my_qp->ipz_qp_handle,
2106                                 NULL, qpcb, my_qp->galpas.kernel);
2107
2108         if (h_ret != H_SUCCESS) {
2109                 ret = ehca2ib_return_code(h_ret);
2110                 ehca_err(srq->device, "hipz_h_query_qp() failed "
2111                          "ehca_qp=%p qp_num=%x h_ret=%li",
2112                          my_qp, my_qp->real_qp_num, h_ret);
2113                 goto query_srq_exit1;
2114         }
2115
2116         srq_attr->max_wr = qpcb->max_nr_outst_recv_wr - 1;
2117         srq_attr->max_sge = 3;
2118         srq_attr->srq_limit = EHCA_BMASK_GET(
2119                 MQPCB_CURR_SRQ_LIMIT, qpcb->curr_srq_limit);
2120
2121         if (ehca_debug_level >= 2)
2122                 ehca_dmp(qpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
2123
2124 query_srq_exit1:
2125         ehca_free_fw_ctrlblock(qpcb);
2126
2127         return ret;
2128 }
2129
2130 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
2131                                struct ib_uobject *uobject)
2132 {
2133         struct ehca_shca *shca = container_of(dev, struct ehca_shca, ib_device);
2134         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
2135                                              ib_pd);
2136         struct ehca_sport *sport = &shca->sport[my_qp->init_attr.port_num - 1];
2137         u32 qp_num = my_qp->real_qp_num;
2138         int ret;
2139         u64 h_ret;
2140         u8 port_num;
2141         enum ib_qp_type qp_type;
2142         unsigned long flags;
2143
2144         if (uobject) {
2145                 if (my_qp->mm_count_galpa ||
2146                     my_qp->mm_count_rqueue || my_qp->mm_count_squeue) {
2147                         ehca_err(dev, "Resources still referenced in "
2148                                  "user space qp_num=%x", qp_num);
2149                         return -EINVAL;
2150                 }
2151         }
2152
2153         if (my_qp->send_cq) {
2154                 ret = ehca_cq_unassign_qp(my_qp->send_cq, qp_num);
2155                 if (ret) {
2156                         ehca_err(dev, "Couldn't unassign qp from "
2157                                  "send_cq ret=%i qp_num=%x cq_num=%x", ret,
2158                                  qp_num, my_qp->send_cq->cq_number);
2159                         return ret;
2160                 }
2161         }
2162
2163         write_lock_irqsave(&ehca_qp_idr_lock, flags);
2164         idr_remove(&ehca_qp_idr, my_qp->token);
2165         write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
2166
2167         /*
2168          * SRQs will never get into an error list and do not have a recv_cq,
2169          * so we need to skip them here.
2170          */
2171         if (HAS_RQ(my_qp) && !IS_SRQ(my_qp))
2172                 del_from_err_list(my_qp->recv_cq, &my_qp->rq_err_node);
2173
2174         if (HAS_SQ(my_qp))
2175                 del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
2176
2177         /* now wait until all pending events have completed */
2178         wait_event(my_qp->wait_completion, !atomic_read(&my_qp->nr_events));
2179
2180         h_ret = hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
2181         if (h_ret != H_SUCCESS) {
2182                 ehca_err(dev, "hipz_h_destroy_qp() failed h_ret=%li "
2183                          "ehca_qp=%p qp_num=%x", h_ret, my_qp, qp_num);
2184                 return ehca2ib_return_code(h_ret);
2185         }
2186
2187         port_num = my_qp->init_attr.port_num;
2188         qp_type  = my_qp->init_attr.qp_type;
2189
2190         if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
2191                 spin_lock_irqsave(&sport->mod_sqp_lock, flags);
2192                 kfree(my_qp->mod_qp_parm);
2193                 my_qp->mod_qp_parm = NULL;
2194                 shca->sport[port_num - 1].ibqp_sqp[qp_type] = NULL;
2195                 spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
2196         }
2197
2198         /* no support for IB_QPT_SMI yet */
2199         if (qp_type == IB_QPT_GSI) {
2200                 struct ib_event event;
2201                 ehca_info(dev, "device %s: port %x is inactive.",
2202                                 shca->ib_device.name, port_num);
2203                 event.device = &shca->ib_device;
2204                 event.event = IB_EVENT_PORT_ERR;
2205                 event.element.port_num = port_num;
2206                 shca->sport[port_num - 1].port_state = IB_PORT_DOWN;
2207                 ib_dispatch_event(&event);
2208         }
2209
2210         if (HAS_RQ(my_qp)) {
2211                 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
2212
2213                 vfree(my_qp->rq_map.map);
2214         }
2215         if (HAS_SQ(my_qp)) {
2216                 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
2217
2218                 vfree(my_qp->sq_map.map);
2219         }
2220         kmem_cache_free(qp_cache, my_qp);
2221         atomic_dec(&shca->num_qps);
2222         return 0;
2223 }
2224
2225 int ehca_destroy_qp(struct ib_qp *qp)
2226 {
2227         return internal_destroy_qp(qp->device,
2228                                    container_of(qp, struct ehca_qp, ib_qp),
2229                                    qp->uobject);
2230 }
2231
2232 int ehca_destroy_srq(struct ib_srq *srq)
2233 {
2234         return internal_destroy_qp(srq->device,
2235                                    container_of(srq, struct ehca_qp, ib_srq),
2236                                    srq->uobject);
2237 }
2238
2239 int ehca_init_qp_cache(void)
2240 {
2241         qp_cache = kmem_cache_create("ehca_cache_qp",
2242                                      sizeof(struct ehca_qp), 0,
2243                                      SLAB_HWCACHE_ALIGN,
2244                                      NULL);
2245         if (!qp_cache)
2246                 return -ENOMEM;
2247         return 0;
2248 }
2249
2250 void ehca_cleanup_qp_cache(void)
2251 {
2252         if (qp_cache)
2253                 kmem_cache_destroy(qp_cache);
2254 }