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 <linux/slab.h>
  47
  48 #include "ehca_classes.h"
  49 #include "ehca_tools.h"
  50 #include "ehca_qes.h"
  51 #include "ehca_iverbs.h"
  52 #include "hcp_if.h"
  53 #include "hipz_fns.h"
  54
  55 static struct kmem_cache *qp_cache;
  56
  57 /*
  58  * attributes not supported by query qp
  59  */
  60 #define QP_ATTR_QUERY_NOT_SUPPORTED (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_ETHERTYPE:
 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=%lli", 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=%lli", 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, is_user = 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         my_qp = kmem_cache_zalloc(qp_cache, GFP_KERNEL);
 613         if (!my_qp) {
 614                 ehca_err(pd->device, "pd=%p not enough memory to alloc qp", pd);
 615                 atomic_dec(&shca->num_qps);
 616                 return ERR_PTR(-ENOMEM);
 617         }
 618
 619         if (pd->uobject && udata) {
 620                 is_user = 1;
 621                 context = pd->uobject->context;
 622         }
 623
 624         atomic_set(&my_qp->nr_events, 0);
 625         init_waitqueue_head(&my_qp->wait_completion);
 626         spin_lock_init(&my_qp->spinlock_s);
 627         spin_lock_init(&my_qp->spinlock_r);
 628         my_qp->qp_type = qp_type;
 629         my_qp->ext_type = parms.ext_type;
 630         my_qp->state = IB_QPS_RESET;
 631
 632         if (init_attr->recv_cq)
 633                 my_qp->recv_cq =
 634                         container_of(init_attr->recv_cq, struct ehca_cq, ib_cq);
 635         if (init_attr->send_cq)
 636                 my_qp->send_cq =
 637                         container_of(init_attr->send_cq, struct ehca_cq, ib_cq);
 638
 639         do {
 640                 if (!idr_pre_get(&ehca_qp_idr, GFP_KERNEL)) {
 641                         ret = -ENOMEM;
 642                         ehca_err(pd->device, "Can't reserve idr resources.");
 643                         goto create_qp_exit0;
 644                 }
 645
 646                 write_lock_irqsave(&ehca_qp_idr_lock, flags);
 647                 ret = idr_get_new(&ehca_qp_idr, my_qp, &my_qp->token);
 648                 write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 649         } while (ret == -EAGAIN);
 650
 651         if (ret) {
 652                 ret = -ENOMEM;
 653                 ehca_err(pd->device, "Can't allocate new idr entry.");
 654                 goto create_qp_exit0;
 655         }
 656
 657         if (my_qp->token > 0x1FFFFFF) {
 658                 ret = -EINVAL;
 659                 ehca_err(pd->device, "Invalid number of qp");
 660                 goto create_qp_exit1;
 661         }
 662
 663         if (has_srq)
 664                 parms.srq_token = my_qp->token;
 665
 666         parms.servicetype = ibqptype2servicetype(qp_type);
 667         if (parms.servicetype < 0) {
 668                 ret = -EINVAL;
 669                 ehca_err(pd->device, "Invalid qp_type=%x", qp_type);
 670                 goto create_qp_exit1;
 671         }
 672
 673         /* Always signal by WQE so we can hide circ. WQEs */
 674         parms.sigtype = HCALL_SIGT_BY_WQE;
 675
 676         /* UD_AV CIRCUMVENTION */
 677         max_send_sge = init_attr->cap.max_send_sge;
 678         max_recv_sge = init_attr->cap.max_recv_sge;
 679         if (parms.servicetype == ST_UD && !is_llqp) {
 680                 max_send_sge += 2;
 681                 max_recv_sge += 2;
 682         }
 683
 684         parms.token = my_qp->token;
 685         parms.eq_handle = shca->eq.ipz_eq_handle;
 686         parms.pd = my_pd->fw_pd;
 687         if (my_qp->send_cq)
 688                 parms.send_cq_handle = my_qp->send_cq->ipz_cq_handle;
 689         if (my_qp->recv_cq)
 690                 parms.recv_cq_handle = my_qp->recv_cq->ipz_cq_handle;
 691
 692         parms.squeue.max_wr = init_attr->cap.max_send_wr;
 693         parms.rqueue.max_wr = init_attr->cap.max_recv_wr;
 694         parms.squeue.max_sge = max_send_sge;
 695         parms.rqueue.max_sge = max_recv_sge;
 696
 697         /* RC QPs need one more SWQE for unsolicited ack circumvention */
 698         if (qp_type == IB_QPT_RC)
 699                 parms.squeue.max_wr++;
 700
 701         if (EHCA_BMASK_GET(HCA_CAP_MINI_QP, shca->hca_cap)) {
 702                 if (HAS_SQ(my_qp))
 703                         ehca_determine_small_queue(
 704                                 &parms.squeue, max_send_sge, is_llqp);
 705                 if (HAS_RQ(my_qp))
 706                         ehca_determine_small_queue(
 707                                 &parms.rqueue, max_recv_sge, is_llqp);
 708                 parms.qp_storage =
 709                         (parms.squeue.is_small || parms.rqueue.is_small);
 710         }
 711
 712         h_ret = hipz_h_alloc_resource_qp(shca->ipz_hca_handle, &parms, is_user);
 713         if (h_ret != H_SUCCESS) {
 714                 ehca_err(pd->device, "h_alloc_resource_qp() failed h_ret=%lli",
 715                          h_ret);
 716                 ret = ehca2ib_return_code(h_ret);
 717                 goto create_qp_exit1;
 718         }
 719
 720         ib_qp_num = my_qp->real_qp_num = parms.real_qp_num;
 721         my_qp->ipz_qp_handle = parms.qp_handle;
 722         my_qp->galpas = parms.galpas;
 723
 724         swqe_size = ehca_calc_wqe_size(parms.squeue.act_nr_sges, is_llqp);
 725         rwqe_size = ehca_calc_wqe_size(parms.rqueue.act_nr_sges, is_llqp);
 726
 727         switch (qp_type) {
 728         case IB_QPT_RC:
 729                 if (is_llqp) {
 730                         parms.squeue.act_nr_sges = 1;
 731                         parms.rqueue.act_nr_sges = 1;
 732                 }
 733                 /* hide the extra WQE */
 734                 parms.squeue.act_nr_wqes--;
 735                 break;
 736         case IB_QPT_UD:
 737         case IB_QPT_GSI:
 738         case IB_QPT_SMI:
 739                 /* UD circumvention */
 740                 if (is_llqp) {
 741                         parms.squeue.act_nr_sges = 1;
 742                         parms.rqueue.act_nr_sges = 1;
 743                 } else {
 744                         parms.squeue.act_nr_sges -= 2;
 745                         parms.rqueue.act_nr_sges -= 2;
 746                 }
 747
 748                 if (IB_QPT_GSI == qp_type || IB_QPT_SMI == qp_type) {
 749                         parms.squeue.act_nr_wqes = init_attr->cap.max_send_wr;
 750                         parms.rqueue.act_nr_wqes = init_attr->cap.max_recv_wr;
 751                         parms.squeue.act_nr_sges = init_attr->cap.max_send_sge;
 752                         parms.rqueue.act_nr_sges = init_attr->cap.max_recv_sge;
 753                         ib_qp_num = (qp_type == IB_QPT_SMI) ? 0 : 1;
 754                 }
 755
 756                 break;
 757
 758         default:
 759                 break;
 760         }
 761
 762         /* initialize r/squeue and register queue pages */
 763         if (HAS_SQ(my_qp)) {
 764                 ret = init_qp_queue(
 765                         shca, my_pd, my_qp, &my_qp->ipz_squeue, 0,
 766                         HAS_RQ(my_qp) ? H_PAGE_REGISTERED : H_SUCCESS,
 767                         &parms.squeue, swqe_size);
 768                 if (ret) {
 769                         ehca_err(pd->device, "Couldn't initialize squeue "
 770                                  "and pages ret=%i", ret);
 771                         goto create_qp_exit2;
 772                 }
 773
 774                 if (!is_user) {
 775                         my_qp->sq_map.entries = my_qp->ipz_squeue.queue_length /
 776                                 my_qp->ipz_squeue.qe_size;
 777                         my_qp->sq_map.map = vmalloc(my_qp->sq_map.entries *
 778                                                     sizeof(struct ehca_qmap_entry));
 779                         if (!my_qp->sq_map.map) {
 780                                 ehca_err(pd->device, "Couldn't allocate squeue "
 781                                          "map ret=%i", ret);
 782                                 goto create_qp_exit3;
 783                         }
 784                         INIT_LIST_HEAD(&my_qp->sq_err_node);
 785                         /* to avoid the generation of bogus flush CQEs */
 786                         reset_queue_map(&my_qp->sq_map);
 787                 }
 788         }
 789
 790         if (HAS_RQ(my_qp)) {
 791                 ret = init_qp_queue(
 792                         shca, my_pd, my_qp, &my_qp->ipz_rqueue, 1,
 793                         H_SUCCESS, &parms.rqueue, rwqe_size);
 794                 if (ret) {
 795                         ehca_err(pd->device, "Couldn't initialize rqueue "
 796                                  "and pages ret=%i", ret);
 797                         goto create_qp_exit4;
 798                 }
 799                 if (!is_user) {
 800                         my_qp->rq_map.entries = my_qp->ipz_rqueue.queue_length /
 801                                 my_qp->ipz_rqueue.qe_size;
 802                         my_qp->rq_map.map = vmalloc(my_qp->rq_map.entries *
 803                                                     sizeof(struct ehca_qmap_entry));
 804                         if (!my_qp->rq_map.map) {
 805                                 ehca_err(pd->device, "Couldn't allocate squeue "
 806                                          "map ret=%i", ret);
 807                                 goto create_qp_exit5;
 808                         }
 809                         INIT_LIST_HEAD(&my_qp->rq_err_node);
 810                         /* to avoid the generation of bogus flush CQEs */
 811                         reset_queue_map(&my_qp->rq_map);
 812                 }
 813         } else if (init_attr->srq && !is_user) {
 814                 /* this is a base QP, use the queue map of the SRQ */
 815                 my_qp->rq_map = my_srq->rq_map;
 816                 INIT_LIST_HEAD(&my_qp->rq_err_node);
 817
 818                 my_qp->ipz_rqueue = my_srq->ipz_rqueue;
 819         }
 820
 821         if (is_srq) {
 822                 my_qp->ib_srq.pd = &my_pd->ib_pd;
 823                 my_qp->ib_srq.device = my_pd->ib_pd.device;
 824
 825                 my_qp->ib_srq.srq_context = init_attr->qp_context;
 826                 my_qp->ib_srq.event_handler = init_attr->event_handler;
 827         } else {
 828                 my_qp->ib_qp.qp_num = ib_qp_num;
 829                 my_qp->ib_qp.pd = &my_pd->ib_pd;
 830                 my_qp->ib_qp.device = my_pd->ib_pd.device;
 831
 832                 my_qp->ib_qp.recv_cq = init_attr->recv_cq;
 833                 my_qp->ib_qp.send_cq = init_attr->send_cq;
 834
 835                 my_qp->ib_qp.qp_type = qp_type;
 836                 my_qp->ib_qp.srq = init_attr->srq;
 837
 838                 my_qp->ib_qp.qp_context = init_attr->qp_context;
 839                 my_qp->ib_qp.event_handler = init_attr->event_handler;
 840         }
 841
 842         init_attr->cap.max_inline_data = 0; /* not supported yet */
 843         init_attr->cap.max_recv_sge = parms.rqueue.act_nr_sges;
 844         init_attr->cap.max_recv_wr = parms.rqueue.act_nr_wqes;
 845         init_attr->cap.max_send_sge = parms.squeue.act_nr_sges;
 846         init_attr->cap.max_send_wr = parms.squeue.act_nr_wqes;
 847         my_qp->init_attr = *init_attr;
 848
 849         if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
 850                 shca->sport[init_attr->port_num - 1].ibqp_sqp[qp_type] =
 851                         &my_qp->ib_qp;
 852                 if (ehca_nr_ports < 0) {
 853                         /* alloc array to cache subsequent modify qp parms
 854                          * for autodetect mode
 855                          */
 856                         my_qp->mod_qp_parm =
 857                                 kzalloc(EHCA_MOD_QP_PARM_MAX *
 858                                         sizeof(*my_qp->mod_qp_parm),
 859                                         GFP_KERNEL);
 860                         if (!my_qp->mod_qp_parm) {
 861                                 ehca_err(pd->device,
 862                                          "Could not alloc mod_qp_parm");
 863                                 goto create_qp_exit5;
 864                         }
 865                 }
 866         }
 867
 868         /* NOTE: define_apq0() not supported yet */
 869         if (qp_type == IB_QPT_GSI) {
 870                 h_ret = ehca_define_sqp(shca, my_qp, init_attr);
 871                 if (h_ret != H_SUCCESS) {
 872                         kfree(my_qp->mod_qp_parm);
 873                         my_qp->mod_qp_parm = NULL;
 874                         /* the QP pointer is no longer valid */
 875                         shca->sport[init_attr->port_num - 1].ibqp_sqp[qp_type] =
 876                                 NULL;
 877                         ret = ehca2ib_return_code(h_ret);
 878                         goto create_qp_exit6;
 879                 }
 880         }
 881
 882         if (my_qp->send_cq) {
 883                 ret = ehca_cq_assign_qp(my_qp->send_cq, my_qp);
 884                 if (ret) {
 885                         ehca_err(pd->device,
 886                                  "Couldn't assign qp to send_cq ret=%i", ret);
 887                         goto create_qp_exit7;
 888                 }
 889         }
 890
 891         /* copy queues, galpa data to user space */
 892         if (context && udata) {
 893                 struct ehca_create_qp_resp resp;
 894                 memset(&resp, 0, sizeof(resp));
 895
 896                 resp.qp_num = my_qp->real_qp_num;
 897                 resp.token = my_qp->token;
 898                 resp.qp_type = my_qp->qp_type;
 899                 resp.ext_type = my_qp->ext_type;
 900                 resp.qkey = my_qp->qkey;
 901                 resp.real_qp_num = my_qp->real_qp_num;
 902
 903                 if (HAS_SQ(my_qp))
 904                         queue2resp(&resp.ipz_squeue, &my_qp->ipz_squeue);
 905                 if (HAS_RQ(my_qp))
 906                         queue2resp(&resp.ipz_rqueue, &my_qp->ipz_rqueue);
 907                 resp.fw_handle_ofs = (u32)
 908                         (my_qp->galpas.user.fw_handle & (PAGE_SIZE - 1));
 909
 910                 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
 911                         ehca_err(pd->device, "Copy to udata failed");
 912                         ret = -EINVAL;
 913                         goto create_qp_exit8;
 914                 }
 915         }
 916
 917         return my_qp;
 918
 919 create_qp_exit8:
 920         ehca_cq_unassign_qp(my_qp->send_cq, my_qp->real_qp_num);
 921
 922 create_qp_exit7:
 923         kfree(my_qp->mod_qp_parm);
 924
 925 create_qp_exit6:
 926         if (HAS_RQ(my_qp) && !is_user)
 927                 vfree(my_qp->rq_map.map);
 928
 929 create_qp_exit5:
 930         if (HAS_RQ(my_qp))
 931                 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
 932
 933 create_qp_exit4:
 934         if (HAS_SQ(my_qp) && !is_user)
 935                 vfree(my_qp->sq_map.map);
 936
 937 create_qp_exit3:
 938         if (HAS_SQ(my_qp))
 939                 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
 940
 941 create_qp_exit2:
 942         hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
 943
 944 create_qp_exit1:
 945         write_lock_irqsave(&ehca_qp_idr_lock, flags);
 946         idr_remove(&ehca_qp_idr, my_qp->token);
 947         write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 948
 949 create_qp_exit0:
 950         kmem_cache_free(qp_cache, my_qp);
 951         atomic_dec(&shca->num_qps);
 952         return ERR_PTR(ret);
 953 }
 954
 955 struct ib_qp *ehca_create_qp(struct ib_pd *pd,
 956                              struct ib_qp_init_attr *qp_init_attr,
 957                              struct ib_udata *udata)
 958 {
 959         struct ehca_qp *ret;
 960
 961         ret = internal_create_qp(pd, qp_init_attr, NULL, udata, 0);
 962         return IS_ERR(ret) ? (struct ib_qp *)ret : &ret->ib_qp;
 963 }
 964
 965 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
 966                                struct ib_uobject *uobject);
 967
 968 struct ib_srq *ehca_create_srq(struct ib_pd *pd,
 969                                struct ib_srq_init_attr *srq_init_attr,
 970                                struct ib_udata *udata)
 971 {
 972         struct ib_qp_init_attr qp_init_attr;
 973         struct ehca_qp *my_qp;
 974         struct ib_srq *ret;
 975         struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
 976                                               ib_device);
 977         struct hcp_modify_qp_control_block *mqpcb;
 978         u64 hret, update_mask;
 979
 980         if (srq_init_attr->srq_type != IB_SRQT_BASIC)
 981                 return ERR_PTR(-ENOSYS);
 982
 983         /* For common attributes, internal_create_qp() takes its info
 984          * out of qp_init_attr, so copy all common attrs there.
 985          */
 986         memset(&qp_init_attr, 0, sizeof(qp_init_attr));
 987         qp_init_attr.event_handler = srq_init_attr->event_handler;
 988         qp_init_attr.qp_context = srq_init_attr->srq_context;
 989         qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
 990         qp_init_attr.qp_type = IB_QPT_RC;
 991         qp_init_attr.cap.max_recv_wr = srq_init_attr->attr.max_wr;
 992         qp_init_attr.cap.max_recv_sge = srq_init_attr->attr.max_sge;
 993
 994         my_qp = internal_create_qp(pd, &qp_init_attr, srq_init_attr, udata, 1);
 995         if (IS_ERR(my_qp))
 996                 return (struct ib_srq *)my_qp;
 997
 998         /* copy back return values */
 999         srq_init_attr->attr.max_wr = qp_init_attr.cap.max_recv_wr;
1000         srq_init_attr->attr.max_sge = 3;
1001
1002         /* drive SRQ into RTR state */
1003         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1004         if (!mqpcb) {
1005                 ehca_err(pd->device, "Could not get zeroed page for mqpcb "
1006                          "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
1007                 ret = ERR_PTR(-ENOMEM);
1008                 goto create_srq1;
1009         }
1010
1011         mqpcb->qp_state = EHCA_QPS_INIT;
1012         mqpcb->prim_phys_port = 1;
1013         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1014         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
1015                                 my_qp->ipz_qp_handle,
1016                                 &my_qp->pf,
1017                                 update_mask,
1018                                 mqpcb, my_qp->galpas.kernel);
1019         if (hret != H_SUCCESS) {
1020                 ehca_err(pd->device, "Could not modify SRQ to INIT "
1021                          "ehca_qp=%p qp_num=%x h_ret=%lli",
1022                          my_qp, my_qp->real_qp_num, hret);
1023                 goto create_srq2;
1024         }
1025
1026         mqpcb->qp_enable = 1;
1027         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
1028         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
1029                                 my_qp->ipz_qp_handle,
1030                                 &my_qp->pf,
1031                                 update_mask,
1032                                 mqpcb, my_qp->galpas.kernel);
1033         if (hret != H_SUCCESS) {
1034                 ehca_err(pd->device, "Could not enable SRQ "
1035                          "ehca_qp=%p qp_num=%x h_ret=%lli",
1036                          my_qp, my_qp->real_qp_num, hret);
1037                 goto create_srq2;
1038         }
1039
1040         mqpcb->qp_state  = EHCA_QPS_RTR;
1041         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1042         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
1043                                 my_qp->ipz_qp_handle,
1044                                 &my_qp->pf,
1045                                 update_mask,
1046                                 mqpcb, my_qp->galpas.kernel);
1047         if (hret != H_SUCCESS) {
1048                 ehca_err(pd->device, "Could not modify SRQ to RTR "
1049                          "ehca_qp=%p qp_num=%x h_ret=%lli",
1050                          my_qp, my_qp->real_qp_num, hret);
1051                 goto create_srq2;
1052         }
1053
1054         ehca_free_fw_ctrlblock(mqpcb);
1055
1056         return &my_qp->ib_srq;
1057
1058 create_srq2:
1059         ret = ERR_PTR(ehca2ib_return_code(hret));
1060         ehca_free_fw_ctrlblock(mqpcb);
1061
1062 create_srq1:
1063         internal_destroy_qp(pd->device, my_qp, my_qp->ib_srq.uobject);
1064
1065         return ret;
1066 }
1067
1068 /*
1069  * prepare_sqe_rts called by internal_modify_qp() at trans sqe -> rts
1070  * set purge bit of bad wqe and subsequent wqes to avoid reentering sqe
1071  * returns total number of bad wqes in bad_wqe_cnt
1072  */
1073 static int prepare_sqe_rts(struct ehca_qp *my_qp, struct ehca_shca *shca,
1074                            int *bad_wqe_cnt)
1075 {
1076         u64 h_ret;
1077         struct ipz_queue *squeue;
1078         void *bad_send_wqe_p, *bad_send_wqe_v;
1079         u64 q_ofs;
1080         struct ehca_wqe *wqe;
1081         int qp_num = my_qp->ib_qp.qp_num;
1082
1083         /* get send wqe pointer */
1084         h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
1085                                            my_qp->ipz_qp_handle, &my_qp->pf,
1086                                            &bad_send_wqe_p, NULL, 2);
1087         if (h_ret != H_SUCCESS) {
1088                 ehca_err(&shca->ib_device, "hipz_h_disable_and_get_wqe() failed"
1089                          " ehca_qp=%p qp_num=%x h_ret=%lli",
1090                          my_qp, qp_num, h_ret);
1091                 return ehca2ib_return_code(h_ret);
1092         }
1093         bad_send_wqe_p = (void *)((u64)bad_send_wqe_p & (~(1L << 63)));
1094         ehca_dbg(&shca->ib_device, "qp_num=%x bad_send_wqe_p=%p",
1095                  qp_num, bad_send_wqe_p);
1096         /* convert wqe pointer to vadr */
1097         bad_send_wqe_v = abs_to_virt((u64)bad_send_wqe_p);
1098         if (ehca_debug_level >= 2)
1099                 ehca_dmp(bad_send_wqe_v, 32, "qp_num=%x bad_wqe", qp_num);
1100         squeue = &my_qp->ipz_squeue;
1101         if (ipz_queue_abs_to_offset(squeue, (u64)bad_send_wqe_p, &q_ofs)) {
1102                 ehca_err(&shca->ib_device, "failed to get wqe offset qp_num=%x"
1103                          " bad_send_wqe_p=%p", qp_num, bad_send_wqe_p);
1104                 return -EFAULT;
1105         }
1106
1107         /* loop sets wqe's purge bit */
1108         wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
1109         *bad_wqe_cnt = 0;
1110         while (wqe->optype != 0xff && wqe->wqef != 0xff) {
1111                 if (ehca_debug_level >= 2)
1112                         ehca_dmp(wqe, 32, "qp_num=%x wqe", qp_num);
1113                 wqe->nr_of_data_seg = 0; /* suppress data access */
1114                 wqe->wqef = WQEF_PURGE; /* WQE to be purged */
1115                 q_ofs = ipz_queue_advance_offset(squeue, q_ofs);
1116                 wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
1117                 *bad_wqe_cnt = (*bad_wqe_cnt)+1;
1118         }
1119         /*
1120          * bad wqe will be reprocessed and ignored when pol_cq() is called,
1121          *  i.e. nr of wqes with flush error status is one less
1122          */
1123         ehca_dbg(&shca->ib_device, "qp_num=%x flusherr_wqe_cnt=%x",
1124                  qp_num, (*bad_wqe_cnt)-1);
1125         wqe->wqef = 0;
1126
1127         return 0;
1128 }
1129
1130 static int calc_left_cqes(u64 wqe_p, struct ipz_queue *ipz_queue,
1131                           struct ehca_queue_map *qmap)
1132 {
1133         void *wqe_v;
1134         u64 q_ofs;
1135         u32 wqe_idx;
1136         unsigned int tail_idx;
1137
1138         /* convert real to abs address */
1139         wqe_p = wqe_p & (~(1UL << 63));
1140
1141         wqe_v = abs_to_virt(wqe_p);
1142
1143         if (ipz_queue_abs_to_offset(ipz_queue, wqe_p, &q_ofs)) {
1144                 ehca_gen_err("Invalid offset for calculating left cqes "
1145                                 "wqe_p=%#llx wqe_v=%p\n", wqe_p, wqe_v);
1146                 return -EFAULT;
1147         }
1148
1149         tail_idx = next_index(qmap->tail, qmap->entries);
1150         wqe_idx = q_ofs / ipz_queue->qe_size;
1151
1152         /* check all processed wqes, whether a cqe is requested or not */
1153         while (tail_idx != wqe_idx) {
1154                 if (qmap->map[tail_idx].cqe_req)
1155                         qmap->left_to_poll++;
1156                 tail_idx = next_index(tail_idx, qmap->entries);
1157         }
1158         /* save index in queue, where we have to start flushing */
1159         qmap->next_wqe_idx = wqe_idx;
1160         return 0;
1161 }
1162
1163 static int check_for_left_cqes(struct ehca_qp *my_qp, struct ehca_shca *shca)
1164 {
1165         u64 h_ret;
1166         void *send_wqe_p, *recv_wqe_p;
1167         int ret;
1168         unsigned long flags;
1169         int qp_num = my_qp->ib_qp.qp_num;
1170
1171         /* this hcall is not supported on base QPs */
1172         if (my_qp->ext_type != EQPT_SRQBASE) {
1173                 /* get send and receive wqe pointer */
1174                 h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
1175                                 my_qp->ipz_qp_handle, &my_qp->pf,
1176                                 &send_wqe_p, &recv_wqe_p, 4);
1177                 if (h_ret != H_SUCCESS) {
1178                         ehca_err(&shca->ib_device, "disable_and_get_wqe() "
1179                                  "failed ehca_qp=%p qp_num=%x h_ret=%lli",
1180                                  my_qp, qp_num, h_ret);
1181                         return ehca2ib_return_code(h_ret);
1182                 }
1183
1184                 /*
1185                  * acquire lock to ensure that nobody is polling the cq which
1186                  * could mean that the qmap->tail pointer is in an
1187                  * inconsistent state.
1188                  */
1189                 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
1190                 ret = calc_left_cqes((u64)send_wqe_p, &my_qp->ipz_squeue,
1191                                 &my_qp->sq_map);
1192                 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
1193                 if (ret)
1194                         return ret;
1195
1196
1197                 spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
1198                 ret = calc_left_cqes((u64)recv_wqe_p, &my_qp->ipz_rqueue,
1199                                 &my_qp->rq_map);
1200                 spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
1201                 if (ret)
1202                         return ret;
1203         } else {
1204                 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
1205                 my_qp->sq_map.left_to_poll = 0;
1206                 my_qp->sq_map.next_wqe_idx = next_index(my_qp->sq_map.tail,
1207                                                         my_qp->sq_map.entries);
1208                 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
1209
1210                 spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
1211                 my_qp->rq_map.left_to_poll = 0;
1212                 my_qp->rq_map.next_wqe_idx = next_index(my_qp->rq_map.tail,
1213                                                         my_qp->rq_map.entries);
1214                 spin_unlock_irqrestore(&my_qp->recv_cq->spinlock, flags);
1215         }
1216
1217         /* this assures flush cqes being generated only for pending wqes */
1218         if ((my_qp->sq_map.left_to_poll == 0) &&
1219                                 (my_qp->rq_map.left_to_poll == 0)) {
1220                 spin_lock_irqsave(&my_qp->send_cq->spinlock, flags);
1221                 ehca_add_to_err_list(my_qp, 1);
1222                 spin_unlock_irqrestore(&my_qp->send_cq->spinlock, flags);
1223
1224                 if (HAS_RQ(my_qp)) {
1225                         spin_lock_irqsave(&my_qp->recv_cq->spinlock, flags);
1226                         ehca_add_to_err_list(my_qp, 0);
1227                         spin_unlock_irqrestore(&my_qp->recv_cq->spinlock,
1228                                         flags);
1229                 }
1230         }
1231
1232         return 0;
1233 }
1234
1235 /*
1236  * internal_modify_qp with circumvention to handle aqp0 properly
1237  * smi_reset2init indicates if this is an internal reset-to-init-call for
1238  * smi. This flag must always be zero if called from ehca_modify_qp()!
1239  * This internal func was intorduced to avoid recursion of ehca_modify_qp()!
1240  */
1241 static int internal_modify_qp(struct ib_qp *ibqp,
1242                               struct ib_qp_attr *attr,
1243                               int attr_mask, int smi_reset2init)
1244 {
1245         enum ib_qp_state qp_cur_state, qp_new_state;
1246         int cnt, qp_attr_idx, ret = 0;
1247         enum ib_qp_statetrans statetrans;
1248         struct hcp_modify_qp_control_block *mqpcb;
1249         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1250         struct ehca_shca *shca =
1251                 container_of(ibqp->pd->device, struct ehca_shca, ib_device);
1252         u64 update_mask;
1253         u64 h_ret;
1254         int bad_wqe_cnt = 0;
1255         int is_user = 0;
1256         int squeue_locked = 0;
1257         unsigned long flags = 0;
1258
1259         /* do query_qp to obtain current attr values */
1260         mqpcb = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
1261         if (!mqpcb) {
1262                 ehca_err(ibqp->device, "Could not get zeroed page for mqpcb "
1263                          "ehca_qp=%p qp_num=%x ", my_qp, ibqp->qp_num);
1264                 return -ENOMEM;
1265         }
1266
1267         h_ret = hipz_h_query_qp(shca->ipz_hca_handle,
1268                                 my_qp->ipz_qp_handle,
1269                                 &my_qp->pf,
1270                                 mqpcb, my_qp->galpas.kernel);
1271         if (h_ret != H_SUCCESS) {
1272                 ehca_err(ibqp->device, "hipz_h_query_qp() failed "
1273                          "ehca_qp=%p qp_num=%x h_ret=%lli",
1274                          my_qp, ibqp->qp_num, h_ret);
1275                 ret = ehca2ib_return_code(h_ret);
1276                 goto modify_qp_exit1;
1277         }
1278         if (ibqp->uobject)
1279                 is_user = 1;
1280
1281         qp_cur_state = ehca2ib_qp_state(mqpcb->qp_state);
1282
1283         if (qp_cur_state == -EINVAL) {  /* invalid qp state */
1284                 ret = -EINVAL;
1285                 ehca_err(ibqp->device, "Invalid current ehca_qp_state=%x "
1286                          "ehca_qp=%p qp_num=%x",
1287                          mqpcb->qp_state, my_qp, ibqp->qp_num);
1288                 goto modify_qp_exit1;
1289         }
1290         /*
1291          * circumvention to set aqp0 initial state to init
1292          * as expected by IB spec
1293          */
1294         if (smi_reset2init == 0 &&
1295             ibqp->qp_type == IB_QPT_SMI &&
1296             qp_cur_state == IB_QPS_RESET &&
1297             (attr_mask & IB_QP_STATE) &&
1298             attr->qp_state == IB_QPS_INIT) { /* RESET -> INIT */
1299                 struct ib_qp_attr smiqp_attr = {
1300                         .qp_state = IB_QPS_INIT,
1301                         .port_num = my_qp->init_attr.port_num,
1302                         .pkey_index = 0,
1303                         .qkey = 0
1304                 };
1305                 int smiqp_attr_mask = IB_QP_STATE | IB_QP_PORT |
1306                         IB_QP_PKEY_INDEX | IB_QP_QKEY;
1307                 int smirc = internal_modify_qp(
1308                         ibqp, &smiqp_attr, smiqp_attr_mask, 1);
1309                 if (smirc) {
1310                         ehca_err(ibqp->device, "SMI RESET -> INIT failed. "
1311                                  "ehca_modify_qp() rc=%i", smirc);
1312                         ret = H_PARAMETER;
1313                         goto modify_qp_exit1;
1314                 }
1315                 qp_cur_state = IB_QPS_INIT;
1316                 ehca_dbg(ibqp->device, "SMI RESET -> INIT succeeded");
1317         }
1318         /* is transmitted current state  equal to "real" current state */
1319         if ((attr_mask & IB_QP_CUR_STATE) &&
1320             qp_cur_state != attr->cur_qp_state) {
1321                 ret = -EINVAL;
1322                 ehca_err(ibqp->device,
1323                          "Invalid IB_QP_CUR_STATE attr->curr_qp_state=%x <>"
1324                          " actual cur_qp_state=%x. ehca_qp=%p qp_num=%x",
1325                          attr->cur_qp_state, qp_cur_state, my_qp, ibqp->qp_num);
1326                 goto modify_qp_exit1;
1327         }
1328
1329         ehca_dbg(ibqp->device, "ehca_qp=%p qp_num=%x current qp_state=%x "
1330                  "new qp_state=%x attribute_mask=%x",
1331                  my_qp, ibqp->qp_num, qp_cur_state, attr->qp_state, attr_mask);
1332
1333         qp_new_state = attr_mask & IB_QP_STATE ? attr->qp_state : qp_cur_state;
1334         if (!smi_reset2init &&
1335             !ib_modify_qp_is_ok(qp_cur_state, qp_new_state, ibqp->qp_type,
1336                                 attr_mask)) {
1337                 ret = -EINVAL;
1338                 ehca_err(ibqp->device,
1339                          "Invalid qp transition new_state=%x cur_state=%x "
1340                          "ehca_qp=%p qp_num=%x attr_mask=%x", qp_new_state,
1341                          qp_cur_state, my_qp, ibqp->qp_num, attr_mask);
1342                 goto modify_qp_exit1;
1343         }
1344
1345         mqpcb->qp_state = ib2ehca_qp_state(qp_new_state);
1346         if (mqpcb->qp_state)
1347                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1348         else {
1349                 ret = -EINVAL;
1350                 ehca_err(ibqp->device, "Invalid new qp state=%x "
1351                          "ehca_qp=%p qp_num=%x",
1352                          qp_new_state, my_qp, ibqp->qp_num);
1353                 goto modify_qp_exit1;
1354         }
1355
1356         /* retrieve state transition struct to get req and opt attrs */
1357         statetrans = get_modqp_statetrans(qp_cur_state, qp_new_state);
1358         if (statetrans < 0) {
1359                 ret = -EINVAL;
1360                 ehca_err(ibqp->device, "<INVALID STATE CHANGE> qp_cur_state=%x "
1361                          "new_qp_state=%x State_xsition=%x ehca_qp=%p "
1362                          "qp_num=%x", qp_cur_state, qp_new_state,
1363                          statetrans, my_qp, ibqp->qp_num);
1364                 goto modify_qp_exit1;
1365         }
1366
1367         qp_attr_idx = ib2ehcaqptype(ibqp->qp_type);
1368
1369         if (qp_attr_idx < 0) {
1370                 ret = qp_attr_idx;
1371                 ehca_err(ibqp->device,
1372                          "Invalid QP type=%x ehca_qp=%p qp_num=%x",
1373                          ibqp->qp_type, my_qp, ibqp->qp_num);
1374                 goto modify_qp_exit1;
1375         }
1376
1377         ehca_dbg(ibqp->device,
1378                  "ehca_qp=%p qp_num=%x <VALID STATE CHANGE> qp_state_xsit=%x",
1379                  my_qp, ibqp->qp_num, statetrans);
1380
1381         /* eHCA2 rev2 and higher require the SEND_GRH_FLAG to be set
1382          * in non-LL UD QPs.
1383          */
1384         if ((my_qp->qp_type == IB_QPT_UD) &&
1385             (my_qp->ext_type != EQPT_LLQP) &&
1386             (statetrans == IB_QPST_INIT2RTR) &&
1387             (shca->hw_level >= 0x22)) {
1388                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1389                 mqpcb->send_grh_flag = 1;
1390         }
1391
1392         /* sqe -> rts: set purge bit of bad wqe before actual trans */
1393         if ((my_qp->qp_type == IB_QPT_UD ||
1394              my_qp->qp_type == IB_QPT_GSI ||
1395              my_qp->qp_type == IB_QPT_SMI) &&
1396             statetrans == IB_QPST_SQE2RTS) {
1397                 /* mark next free wqe if kernel */
1398                 if (!ibqp->uobject) {
1399                         struct ehca_wqe *wqe;
1400                         /* lock send queue */
1401                         spin_lock_irqsave(&my_qp->spinlock_s, flags);
1402                         squeue_locked = 1;
1403                         /* mark next free wqe */
1404                         wqe = (struct ehca_wqe *)
1405                                 ipz_qeit_get(&my_qp->ipz_squeue);
1406                         wqe->optype = wqe->wqef = 0xff;
1407                         ehca_dbg(ibqp->device, "qp_num=%x next_free_wqe=%p",
1408                                  ibqp->qp_num, wqe);
1409                 }
1410                 ret = prepare_sqe_rts(my_qp, shca, &bad_wqe_cnt);
1411                 if (ret) {
1412                         ehca_err(ibqp->device, "prepare_sqe_rts() failed "
1413                                  "ehca_qp=%p qp_num=%x ret=%i",
1414                                  my_qp, ibqp->qp_num, ret);
1415                         goto modify_qp_exit2;
1416                 }
1417         }
1418
1419         /*
1420          * enable RDMA_Atomic_Control if reset->init und reliable con
1421          * this is necessary since gen2 does not provide that flag,
1422          * but pHyp requires it
1423          */
1424         if (statetrans == IB_QPST_RESET2INIT &&
1425             (ibqp->qp_type == IB_QPT_RC || ibqp->qp_type == IB_QPT_UC)) {
1426                 mqpcb->rdma_atomic_ctrl = 3;
1427                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RDMA_ATOMIC_CTRL, 1);
1428         }
1429         /* circ. pHyp requires #RDMA/Atomic Resp Res for UC INIT -> RTR */
1430         if (statetrans == IB_QPST_INIT2RTR &&
1431             (ibqp->qp_type == IB_QPT_UC) &&
1432             !(attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)) {
1433                 mqpcb->rdma_nr_atomic_resp_res = 1; /* default to 1 */
1434                 update_mask |=
1435                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1436         }
1437
1438         if (attr_mask & IB_QP_PKEY_INDEX) {
1439                 if (attr->pkey_index >= 16) {
1440                         ret = -EINVAL;
1441                         ehca_err(ibqp->device, "Invalid pkey_index=%x. "
1442                                  "ehca_qp=%p qp_num=%x max_pkey_index=f",
1443                                  attr->pkey_index, my_qp, ibqp->qp_num);
1444                         goto modify_qp_exit2;
1445                 }
1446                 mqpcb->prim_p_key_idx = attr->pkey_index;
1447                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_P_KEY_IDX, 1);
1448         }
1449         if (attr_mask & IB_QP_PORT) {
1450                 struct ehca_sport *sport;
1451                 struct ehca_qp *aqp1;
1452                 if (attr->port_num < 1 || attr->port_num > shca->num_ports) {
1453                         ret = -EINVAL;
1454                         ehca_err(ibqp->device, "Invalid port=%x. "
1455                                  "ehca_qp=%p qp_num=%x num_ports=%x",
1456                                  attr->port_num, my_qp, ibqp->qp_num,
1457                                  shca->num_ports);
1458                         goto modify_qp_exit2;
1459                 }
1460                 sport = &shca->sport[attr->port_num - 1];
1461                 if (!sport->ibqp_sqp[IB_QPT_GSI]) {
1462                         /* should not occur */
1463                         ret = -EFAULT;
1464                         ehca_err(ibqp->device, "AQP1 was not created for "
1465                                  "port=%x", attr->port_num);
1466                         goto modify_qp_exit2;
1467                 }
1468                 aqp1 = container_of(sport->ibqp_sqp[IB_QPT_GSI],
1469                                     struct ehca_qp, ib_qp);
1470                 if (ibqp->qp_type != IB_QPT_GSI &&
1471                     ibqp->qp_type != IB_QPT_SMI &&
1472                     aqp1->mod_qp_parm) {
1473                         /*
1474                          * firmware will reject this modify_qp() because
1475                          * port is not activated/initialized fully
1476                          */
1477                         ret = -EFAULT;
1478                         ehca_warn(ibqp->device, "Couldn't modify qp port=%x: "
1479                                   "either port is being activated (try again) "
1480                                   "or cabling issue", attr->port_num);
1481                         goto modify_qp_exit2;
1482                 }
1483                 mqpcb->prim_phys_port = attr->port_num;
1484                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_PHYS_PORT, 1);
1485         }
1486         if (attr_mask & IB_QP_QKEY) {
1487                 mqpcb->qkey = attr->qkey;
1488                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_QKEY, 1);
1489         }
1490         if (attr_mask & IB_QP_AV) {
1491                 mqpcb->dlid = attr->ah_attr.dlid;
1492                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DLID, 1);
1493                 mqpcb->source_path_bits = attr->ah_attr.src_path_bits;
1494                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS, 1);
1495                 mqpcb->service_level = attr->ah_attr.sl;
1496                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL, 1);
1497
1498                 if (ehca_calc_ipd(shca, mqpcb->prim_phys_port,
1499                                   attr->ah_attr.static_rate,
1500                                   &mqpcb->max_static_rate)) {
1501                         ret = -EINVAL;
1502                         goto modify_qp_exit2;
1503                 }
1504                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE, 1);
1505
1506                 /*
1507                  * Always supply the GRH flag, even if it's zero, to give the
1508                  * hypervisor a clear "yes" or "no" instead of a "perhaps"
1509                  */
1510                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1511
1512                 /*
1513                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
1514                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1515                  */
1516                 if (attr->ah_attr.ah_flags == IB_AH_GRH) {
1517                         mqpcb->send_grh_flag = 1;
1518
1519                         mqpcb->source_gid_idx = attr->ah_attr.grh.sgid_index;
1520                         update_mask |=
1521                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX, 1);
1522
1523                         for (cnt = 0; cnt < 16; cnt++)
1524                                 mqpcb->dest_gid.byte[cnt] =
1525                                         attr->ah_attr.grh.dgid.raw[cnt];
1526
1527                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_GID, 1);
1528                         mqpcb->flow_label = attr->ah_attr.grh.flow_label;
1529                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL, 1);
1530                         mqpcb->hop_limit = attr->ah_attr.grh.hop_limit;
1531                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT, 1);
1532                         mqpcb->traffic_class = attr->ah_attr.grh.traffic_class;
1533                         update_mask |=
1534                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS, 1);
1535                 }
1536         }
1537
1538         if (attr_mask & IB_QP_PATH_MTU) {
1539                 /* store ld(MTU) */
1540                 my_qp->mtu_shift = attr->path_mtu + 7;
1541                 mqpcb->path_mtu = attr->path_mtu;
1542                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PATH_MTU, 1);
1543         }
1544         if (attr_mask & IB_QP_TIMEOUT) {
1545                 mqpcb->timeout = attr->timeout;
1546                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT, 1);
1547         }
1548         if (attr_mask & IB_QP_RETRY_CNT) {
1549                 mqpcb->retry_count = attr->retry_cnt;
1550                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT, 1);
1551         }
1552         if (attr_mask & IB_QP_RNR_RETRY) {
1553                 mqpcb->rnr_retry_count = attr->rnr_retry;
1554                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT, 1);
1555         }
1556         if (attr_mask & IB_QP_RQ_PSN) {
1557                 mqpcb->receive_psn = attr->rq_psn;
1558                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RECEIVE_PSN, 1);
1559         }
1560         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1561                 mqpcb->rdma_nr_atomic_resp_res = attr->max_dest_rd_atomic < 3 ?
1562                         attr->max_dest_rd_atomic : 2;
1563                 update_mask |=
1564                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1565         }
1566         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1567                 mqpcb->rdma_atomic_outst_dest_qp = attr->max_rd_atomic < 3 ?
1568                         attr->max_rd_atomic : 2;
1569                 update_mask |=
1570                         EHCA_BMASK_SET
1571                         (MQPCB_MASK_RDMA_ATOMIC_OUTST_DEST_QP, 1);
1572         }
1573         if (attr_mask & IB_QP_ALT_PATH) {
1574                 if (attr->alt_port_num < 1
1575                     || attr->alt_port_num > shca->num_ports) {
1576                         ret = -EINVAL;
1577                         ehca_err(ibqp->device, "Invalid alt_port=%x. "
1578                                  "ehca_qp=%p qp_num=%x num_ports=%x",
1579                                  attr->alt_port_num, my_qp, ibqp->qp_num,
1580                                  shca->num_ports);
1581                         goto modify_qp_exit2;
1582                 }
1583                 mqpcb->alt_phys_port = attr->alt_port_num;
1584
1585                 if (attr->alt_pkey_index >= 16) {
1586                         ret = -EINVAL;
1587                         ehca_err(ibqp->device, "Invalid alt_pkey_index=%x. "
1588                                  "ehca_qp=%p qp_num=%x max_pkey_index=f",
1589                                  attr->pkey_index, my_qp, ibqp->qp_num);
1590                         goto modify_qp_exit2;
1591                 }
1592                 mqpcb->alt_p_key_idx = attr->alt_pkey_index;
1593
1594                 mqpcb->timeout_al = attr->alt_timeout;
1595                 mqpcb->dlid_al = attr->alt_ah_attr.dlid;
1596                 mqpcb->source_path_bits_al = attr->alt_ah_attr.src_path_bits;
1597                 mqpcb->service_level_al = attr->alt_ah_attr.sl;
1598
1599                 if (ehca_calc_ipd(shca, mqpcb->alt_phys_port,
1600                                   attr->alt_ah_attr.static_rate,
1601                                   &mqpcb->max_static_rate_al)) {
1602                         ret = -EINVAL;
1603                         goto modify_qp_exit2;
1604                 }
1605
1606                 /* OpenIB doesn't support alternate retry counts - copy them */
1607                 mqpcb->retry_count_al = mqpcb->retry_count;
1608                 mqpcb->rnr_retry_count_al = mqpcb->rnr_retry_count;
1609
1610                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_ALT_PHYS_PORT, 1)
1611                         | EHCA_BMASK_SET(MQPCB_MASK_ALT_P_KEY_IDX, 1)
1612                         | EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT_AL, 1)
1613                         | EHCA_BMASK_SET(MQPCB_MASK_DLID_AL, 1)
1614                         | EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS_AL, 1)
1615                         | EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL_AL, 1)
1616                         | EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE_AL, 1)
1617                         | EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT_AL, 1)
1618                         | EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT_AL, 1);
1619
1620                 /*
1621                  * Always supply the GRH flag, even if it's zero, to give the
1622                  * hypervisor a clear "yes" or "no" instead of a "perhaps"
1623                  */
1624                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG_AL, 1);
1625
1626                 /*
1627                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
1628                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1629                  */
1630                 if (attr->alt_ah_attr.ah_flags == IB_AH_GRH) {
1631                         mqpcb->send_grh_flag_al = 1;
1632
1633                         for (cnt = 0; cnt < 16; cnt++)
1634                                 mqpcb->dest_gid_al.byte[cnt] =
1635                                         attr->alt_ah_attr.grh.dgid.raw[cnt];
1636                         mqpcb->source_gid_idx_al =
1637                                 attr->alt_ah_attr.grh.sgid_index;
1638                         mqpcb->flow_label_al = attr->alt_ah_attr.grh.flow_label;
1639                         mqpcb->hop_limit_al = attr->alt_ah_attr.grh.hop_limit;
1640                         mqpcb->traffic_class_al =
1641                                 attr->alt_ah_attr.grh.traffic_class;
1642
1643                         update_mask |=
1644                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX_AL, 1)
1645                                 | EHCA_BMASK_SET(MQPCB_MASK_DEST_GID_AL, 1)
1646                                 | EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL_AL, 1)
1647                                 | EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT_AL, 1) |
1648                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS_AL, 1);
1649                 }
1650         }
1651
1652         if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1653                 mqpcb->min_rnr_nak_timer_field = attr->min_rnr_timer;
1654                 update_mask |=
1655                         EHCA_BMASK_SET(MQPCB_MASK_MIN_RNR_NAK_TIMER_FIELD, 1);
1656         }
1657
1658         if (attr_mask & IB_QP_SQ_PSN) {
1659                 mqpcb->send_psn = attr->sq_psn;
1660                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_PSN, 1);
1661         }
1662
1663         if (attr_mask & IB_QP_DEST_QPN) {
1664                 mqpcb->dest_qp_nr = attr->dest_qp_num;
1665                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_QP_NR, 1);
1666         }
1667
1668         if (attr_mask & IB_QP_PATH_MIG_STATE) {
1669                 if (attr->path_mig_state != IB_MIG_REARM
1670                     && attr->path_mig_state != IB_MIG_MIGRATED) {
1671                         ret = -EINVAL;
1672                         ehca_err(ibqp->device, "Invalid mig_state=%x",
1673                                  attr->path_mig_state);
1674                         goto modify_qp_exit2;
1675                 }
1676                 mqpcb->path_migration_state = attr->path_mig_state + 1;
1677                 if (attr->path_mig_state == IB_MIG_REARM)
1678                         my_qp->mig_armed = 1;
1679                 update_mask |=
1680                         EHCA_BMASK_SET(MQPCB_MASK_PATH_MIGRATION_STATE, 1);
1681         }
1682
1683         if (attr_mask & IB_QP_CAP) {
1684                 mqpcb->max_nr_outst_send_wr = attr->cap.max_send_wr+1;
1685                 update_mask |=
1686                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_SEND_WR, 1);
1687                 mqpcb->max_nr_outst_recv_wr = attr->cap.max_recv_wr+1;
1688                 update_mask |=
1689                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_RECV_WR, 1);
1690                 /* no support for max_send/recv_sge yet */
1691         }
1692
1693         if (ehca_debug_level >= 2)
1694                 ehca_dmp(mqpcb, 4*70, "qp_num=%x", ibqp->qp_num);
1695
1696         h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1697                                  my_qp->ipz_qp_handle,
1698                                  &my_qp->pf,
1699                                  update_mask,
1700                                  mqpcb, my_qp->galpas.kernel);
1701
1702         if (h_ret != H_SUCCESS) {
1703                 ret = ehca2ib_return_code(h_ret);
1704                 ehca_err(ibqp->device, "hipz_h_modify_qp() failed h_ret=%lli "
1705                          "ehca_qp=%p qp_num=%x", h_ret, my_qp, ibqp->qp_num);
1706                 goto modify_qp_exit2;
1707         }
1708
1709         if ((my_qp->qp_type == IB_QPT_UD ||
1710              my_qp->qp_type == IB_QPT_GSI ||
1711              my_qp->qp_type == IB_QPT_SMI) &&
1712             statetrans == IB_QPST_SQE2RTS) {
1713                 /* doorbell to reprocessing wqes */
1714                 iosync(); /* serialize GAL register access */
1715                 hipz_update_sqa(my_qp, bad_wqe_cnt-1);
1716                 ehca_gen_dbg("doorbell for %x wqes", bad_wqe_cnt);
1717         }
1718
1719         if (statetrans == IB_QPST_RESET2INIT ||
1720             statetrans == IB_QPST_INIT2INIT) {
1721                 mqpcb->qp_enable = 1;
1722                 mqpcb->qp_state = EHCA_QPS_INIT;
1723                 update_mask = 0;
1724                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
1725
1726                 h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1727                                          my_qp->ipz_qp_handle,
1728                                          &my_qp->pf,
1729                                          update_mask,
1730                                          mqpcb,
1731                                          my_qp->galpas.kernel);
1732
1733                 if (h_ret != H_SUCCESS) {
1734                         ret = ehca2ib_return_code(h_ret);
1735                         ehca_err(ibqp->device, "ENABLE in context of "
1736                                  "RESET_2_INIT failed! Maybe you didn't get "
1737                                  "a LID h_ret=%lli ehca_qp=%p qp_num=%x",
1738                                  h_ret, my_qp, ibqp->qp_num);
1739                         goto modify_qp_exit2;
1740                 }
1741         }
1742         if ((qp_new_state == IB_QPS_ERR) && (qp_cur_state != IB_QPS_ERR)
1743             && !is_user) {
1744                 ret = check_for_left_cqes(my_qp, shca);
1745                 if (ret)
1746                         goto modify_qp_exit2;
1747         }
1748
1749         if (statetrans == IB_QPST_ANY2RESET) {
1750                 ipz_qeit_reset(&my_qp->ipz_rqueue);
1751                 ipz_qeit_reset(&my_qp->ipz_squeue);
1752
1753                 if (qp_cur_state == IB_QPS_ERR && !is_user) {
1754                         del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
1755
1756                         if (HAS_RQ(my_qp))
1757                                 del_from_err_list(my_qp->recv_cq,
1758                                                   &my_qp->rq_err_node);
1759                 }
1760                 if (!is_user)
1761                         reset_queue_map(&my_qp->sq_map);
1762
1763                 if (HAS_RQ(my_qp) && !is_user)
1764                         reset_queue_map(&my_qp->rq_map);
1765         }
1766
1767         if (attr_mask & IB_QP_QKEY)
1768                 my_qp->qkey = attr->qkey;
1769
1770 modify_qp_exit2:
1771         if (squeue_locked) { /* this means: sqe -> rts */
1772                 spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
1773                 my_qp->sqerr_purgeflag = 1;
1774         }
1775
1776 modify_qp_exit1:
1777         ehca_free_fw_ctrlblock(mqpcb);
1778
1779         return ret;
1780 }
1781
1782 int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
1783                    struct ib_udata *udata)
1784 {
1785         int ret = 0;
1786
1787         struct ehca_shca *shca = container_of(ibqp->device, struct ehca_shca,
1788                                               ib_device);
1789         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1790
1791         /* The if-block below caches qp_attr to be modified for GSI and SMI
1792          * qps during the initialization by ib_mad. When the respective port
1793          * is activated, ie we got an event PORT_ACTIVE, we'll replay the
1794          * cached modify calls sequence, see ehca_recover_sqs() below.
1795          * Why that is required:
1796          * 1) If one port is connected, older code requires that port one
1797          *    to be connected and module option nr_ports=1 to be given by
1798          *    user, which is very inconvenient for end user.
1799          * 2) Firmware accepts modify_qp() only if respective port has become
1800          *    active. Older code had a wait loop of 30sec create_qp()/
1801          *    define_aqp1(), which is not appropriate in practice. This
1802          *    code now removes that wait loop, see define_aqp1(), and always
1803          *    reports all ports to ib_mad resp. users. Only activated ports
1804          *    will then usable for the users.
1805          */
1806         if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) {
1807                 int port = my_qp->init_attr.port_num;
1808                 struct ehca_sport *sport = &shca->sport[port - 1];
1809                 unsigned long flags;
1810                 spin_lock_irqsave(&sport->mod_sqp_lock, flags);
1811                 /* cache qp_attr only during init */
1812                 if (my_qp->mod_qp_parm) {
1813                         struct ehca_mod_qp_parm *p;
1814                         if (my_qp->mod_qp_parm_idx >= EHCA_MOD_QP_PARM_MAX) {
1815                                 ehca_err(&shca->ib_device,
1816                                          "mod_qp_parm overflow state=%x port=%x"
1817                                          " type=%x", attr->qp_state,
1818                                          my_qp->init_attr.port_num,
1819                                          ibqp->qp_type);
1820                                 spin_unlock_irqrestore(&sport->mod_sqp_lock,
1821                                                        flags);
1822                                 return -EINVAL;
1823                         }
1824                         p = &my_qp->mod_qp_parm[my_qp->mod_qp_parm_idx];
1825                         p->mask = attr_mask;
1826                         p->attr = *attr;
1827                         my_qp->mod_qp_parm_idx++;
1828                         ehca_dbg(&shca->ib_device,
1829                                  "Saved qp_attr for state=%x port=%x type=%x",
1830                                  attr->qp_state, my_qp->init_attr.port_num,
1831                                  ibqp->qp_type);
1832                         spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
1833                         goto out;
1834                 }
1835                 spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
1836         }
1837
1838         ret = internal_modify_qp(ibqp, attr, attr_mask, 0);
1839
1840 out:
1841         if ((ret == 0) && (attr_mask & IB_QP_STATE))
1842                 my_qp->state = attr->qp_state;
1843
1844         return ret;
1845 }
1846
1847 void ehca_recover_sqp(struct ib_qp *sqp)
1848 {
1849         struct ehca_qp *my_sqp = container_of(sqp, struct ehca_qp, ib_qp);
1850         int port = my_sqp->init_attr.port_num;
1851         struct ib_qp_attr attr;
1852         struct ehca_mod_qp_parm *qp_parm;
1853         int i, qp_parm_idx, ret;
1854         unsigned long flags, wr_cnt;
1855
1856         if (!my_sqp->mod_qp_parm)
1857                 return;
1858         ehca_dbg(sqp->device, "SQP port=%x qp_num=%x", port, sqp->qp_num);
1859
1860         qp_parm = my_sqp->mod_qp_parm;
1861         qp_parm_idx = my_sqp->mod_qp_parm_idx;
1862         for (i = 0; i < qp_parm_idx; i++) {
1863                 attr = qp_parm[i].attr;
1864                 ret = internal_modify_qp(sqp, &attr, qp_parm[i].mask, 0);
1865                 if (ret) {
1866                         ehca_err(sqp->device, "Could not modify SQP port=%x "
1867                                  "qp_num=%x ret=%x", port, sqp->qp_num, ret);
1868                         goto free_qp_parm;
1869                 }
1870                 ehca_dbg(sqp->device, "SQP port=%x qp_num=%x in state=%x",
1871                          port, sqp->qp_num, attr.qp_state);
1872         }
1873
1874         /* re-trigger posted recv wrs */
1875         wr_cnt =  my_sqp->ipz_rqueue.current_q_offset /
1876                 my_sqp->ipz_rqueue.qe_size;
1877         if (wr_cnt) {
1878                 spin_lock_irqsave(&my_sqp->spinlock_r, flags);
1879                 hipz_update_rqa(my_sqp, wr_cnt);
1880                 spin_unlock_irqrestore(&my_sqp->spinlock_r, flags);
1881                 ehca_dbg(sqp->device, "doorbell port=%x qp_num=%x wr_cnt=%lx",
1882                          port, sqp->qp_num, wr_cnt);
1883         }
1884
1885 free_qp_parm:
1886         kfree(qp_parm);
1887         /* this prevents subsequent calls to modify_qp() to cache qp_attr */
1888         my_sqp->mod_qp_parm = NULL;
1889 }
1890
1891 int ehca_query_qp(struct ib_qp *qp,
1892                   struct ib_qp_attr *qp_attr,
1893                   int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
1894 {
1895         struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
1896         struct ehca_shca *shca = container_of(qp->device, struct ehca_shca,
1897                                               ib_device);
1898         struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
1899         struct hcp_modify_qp_control_block *qpcb;
1900         int cnt, ret = 0;
1901         u64 h_ret;
1902
1903         if (qp_attr_mask & QP_ATTR_QUERY_NOT_SUPPORTED) {
1904                 ehca_err(qp->device, "Invalid attribute mask "
1905                          "ehca_qp=%p qp_num=%x qp_attr_mask=%x ",
1906                          my_qp, qp->qp_num, qp_attr_mask);
1907                 return -EINVAL;
1908         }
1909
1910         qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1911         if (!qpcb) {
1912                 ehca_err(qp->device, "Out of memory for qpcb "
1913                          "ehca_qp=%p qp_num=%x", my_qp, qp->qp_num);
1914                 return -ENOMEM;
1915         }
1916
1917         h_ret = hipz_h_query_qp(adapter_handle,
1918                                 my_qp->ipz_qp_handle,
1919                                 &my_qp->pf,
1920                                 qpcb, my_qp->galpas.kernel);
1921
1922         if (h_ret != H_SUCCESS) {
1923                 ret = ehca2ib_return_code(h_ret);
1924                 ehca_err(qp->device, "hipz_h_query_qp() failed "
1925                          "ehca_qp=%p qp_num=%x h_ret=%lli",
1926                          my_qp, qp->qp_num, h_ret);
1927                 goto query_qp_exit1;
1928         }
1929
1930         qp_attr->cur_qp_state = ehca2ib_qp_state(qpcb->qp_state);
1931         qp_attr->qp_state = qp_attr->cur_qp_state;
1932
1933         if (qp_attr->cur_qp_state == -EINVAL) {
1934                 ret = -EINVAL;
1935                 ehca_err(qp->device, "Got invalid ehca_qp_state=%x "
1936                          "ehca_qp=%p qp_num=%x",
1937                          qpcb->qp_state, my_qp, qp->qp_num);
1938                 goto query_qp_exit1;
1939         }
1940
1941         if (qp_attr->qp_state == IB_QPS_SQD)
1942                 qp_attr->sq_draining = 1;
1943
1944         qp_attr->qkey = qpcb->qkey;
1945         qp_attr->path_mtu = qpcb->path_mtu;
1946         qp_attr->path_mig_state = qpcb->path_migration_state - 1;
1947         qp_attr->rq_psn = qpcb->receive_psn;
1948         qp_attr->sq_psn = qpcb->send_psn;
1949         qp_attr->min_rnr_timer = qpcb->min_rnr_nak_timer_field;
1950         qp_attr->cap.max_send_wr = qpcb->max_nr_outst_send_wr-1;
1951         qp_attr->cap.max_recv_wr = qpcb->max_nr_outst_recv_wr-1;
1952         /* UD_AV CIRCUMVENTION */
1953         if (my_qp->qp_type == IB_QPT_UD) {
1954                 qp_attr->cap.max_send_sge =
1955                         qpcb->actual_nr_sges_in_sq_wqe - 2;
1956                 qp_attr->cap.max_recv_sge =
1957                         qpcb->actual_nr_sges_in_rq_wqe - 2;
1958         } else {
1959                 qp_attr->cap.max_send_sge =
1960                         qpcb->actual_nr_sges_in_sq_wqe;
1961                 qp_attr->cap.max_recv_sge =
1962                         qpcb->actual_nr_sges_in_rq_wqe;
1963         }
1964
1965         qp_attr->cap.max_inline_data = my_qp->sq_max_inline_data_size;
1966         qp_attr->dest_qp_num = qpcb->dest_qp_nr;
1967
1968         qp_attr->pkey_index = qpcb->prim_p_key_idx;
1969         qp_attr->port_num = qpcb->prim_phys_port;
1970         qp_attr->timeout = qpcb->timeout;
1971         qp_attr->retry_cnt = qpcb->retry_count;
1972         qp_attr->rnr_retry = qpcb->rnr_retry_count;
1973
1974         qp_attr->alt_pkey_index = qpcb->alt_p_key_idx;
1975         qp_attr->alt_port_num = qpcb->alt_phys_port;
1976         qp_attr->alt_timeout = qpcb->timeout_al;
1977
1978         qp_attr->max_dest_rd_atomic = qpcb->rdma_nr_atomic_resp_res;
1979         qp_attr->max_rd_atomic = qpcb->rdma_atomic_outst_dest_qp;
1980
1981         /* primary av */
1982         qp_attr->ah_attr.sl = qpcb->service_level;
1983
1984         if (qpcb->send_grh_flag) {
1985                 qp_attr->ah_attr.ah_flags = IB_AH_GRH;
1986         }
1987
1988         qp_attr->ah_attr.static_rate = qpcb->max_static_rate;
1989         qp_attr->ah_attr.dlid = qpcb->dlid;
1990         qp_attr->ah_attr.src_path_bits = qpcb->source_path_bits;
1991         qp_attr->ah_attr.port_num = qp_attr->port_num;
1992
1993         /* primary GRH */
1994         qp_attr->ah_attr.grh.traffic_class = qpcb->traffic_class;
1995         qp_attr->ah_attr.grh.hop_limit = qpcb->hop_limit;
1996         qp_attr->ah_attr.grh.sgid_index = qpcb->source_gid_idx;
1997         qp_attr->ah_attr.grh.flow_label = qpcb->flow_label;
1998
1999         for (cnt = 0; cnt < 16; cnt++)
2000                 qp_attr->ah_attr.grh.dgid.raw[cnt] =
2001                         qpcb->dest_gid.byte[cnt];
2002
2003         /* alternate AV */
2004         qp_attr->alt_ah_attr.sl = qpcb->service_level_al;
2005         if (qpcb->send_grh_flag_al) {
2006                 qp_attr->alt_ah_attr.ah_flags = IB_AH_GRH;
2007         }
2008
2009         qp_attr->alt_ah_attr.static_rate = qpcb->max_static_rate_al;
2010         qp_attr->alt_ah_attr.dlid = qpcb->dlid_al;
2011         qp_attr->alt_ah_attr.src_path_bits = qpcb->source_path_bits_al;
2012
2013         /* alternate GRH */
2014         qp_attr->alt_ah_attr.grh.traffic_class = qpcb->traffic_class_al;
2015         qp_attr->alt_ah_attr.grh.hop_limit = qpcb->hop_limit_al;
2016         qp_attr->alt_ah_attr.grh.sgid_index = qpcb->source_gid_idx_al;
2017         qp_attr->alt_ah_attr.grh.flow_label = qpcb->flow_label_al;
2018
2019         for (cnt = 0; cnt < 16; cnt++)
2020                 qp_attr->alt_ah_attr.grh.dgid.raw[cnt] =
2021                         qpcb->dest_gid_al.byte[cnt];
2022
2023         /* return init attributes given in ehca_create_qp */
2024         if (qp_init_attr)
2025                 *qp_init_attr = my_qp->init_attr;
2026
2027         if (ehca_debug_level >= 2)
2028                 ehca_dmp(qpcb, 4*70, "qp_num=%x", qp->qp_num);
2029
2030 query_qp_exit1:
2031         ehca_free_fw_ctrlblock(qpcb);
2032
2033         return ret;
2034 }
2035
2036 int ehca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
2037                     enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
2038 {
2039         struct ehca_qp *my_qp =
2040                 container_of(ibsrq, struct ehca_qp, ib_srq);
2041         struct ehca_shca *shca =
2042                 container_of(ibsrq->pd->device, struct ehca_shca, ib_device);
2043         struct hcp_modify_qp_control_block *mqpcb;
2044         u64 update_mask;
2045         u64 h_ret;
2046         int ret = 0;
2047
2048         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
2049         if (!mqpcb) {
2050                 ehca_err(ibsrq->device, "Could not get zeroed page for mqpcb "
2051                          "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
2052                 return -ENOMEM;
2053         }
2054
2055         update_mask = 0;
2056         if (attr_mask & IB_SRQ_LIMIT) {
2057                 attr_mask &= ~IB_SRQ_LIMIT;
2058                 update_mask |=
2059                         EHCA_BMASK_SET(MQPCB_MASK_CURR_SRQ_LIMIT, 1)
2060                         | EHCA_BMASK_SET(MQPCB_MASK_QP_AFF_ASYN_EV_LOG_REG, 1);
2061                 mqpcb->curr_srq_limit = attr->srq_limit;
2062                 mqpcb->qp_aff_asyn_ev_log_reg =
2063                         EHCA_BMASK_SET(QPX_AAELOG_RESET_SRQ_LIMIT, 1);
2064         }
2065
2066         /* by now, all bits in attr_mask should have been cleared */
2067         if (attr_mask) {
2068                 ehca_err(ibsrq->device, "invalid attribute mask bits set  "
2069                          "attr_mask=%x", attr_mask);
2070                 ret = -EINVAL;
2071                 goto modify_srq_exit0;
2072         }
2073
2074         if (ehca_debug_level >= 2)
2075                 ehca_dmp(mqpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
2076
2077         h_ret = hipz_h_modify_qp(shca->ipz_hca_handle, my_qp->ipz_qp_handle,
2078                                  NULL, update_mask, mqpcb,
2079                                  my_qp->galpas.kernel);
2080
2081         if (h_ret != H_SUCCESS) {
2082                 ret = ehca2ib_return_code(h_ret);
2083                 ehca_err(ibsrq->device, "hipz_h_modify_qp() failed h_ret=%lli "
2084                          "ehca_qp=%p qp_num=%x",
2085                          h_ret, my_qp, my_qp->real_qp_num);
2086         }
2087
2088 modify_srq_exit0:
2089         ehca_free_fw_ctrlblock(mqpcb);
2090
2091         return ret;
2092 }
2093
2094 int ehca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr)
2095 {
2096         struct ehca_qp *my_qp = container_of(srq, struct ehca_qp, ib_srq);
2097         struct ehca_shca *shca = container_of(srq->device, struct ehca_shca,
2098                                               ib_device);
2099         struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
2100         struct hcp_modify_qp_control_block *qpcb;
2101         int ret = 0;
2102         u64 h_ret;
2103
2104         qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
2105         if (!qpcb) {
2106                 ehca_err(srq->device, "Out of memory for qpcb "
2107                          "ehca_qp=%p qp_num=%x", my_qp, my_qp->real_qp_num);
2108                 return -ENOMEM;
2109         }
2110
2111         h_ret = hipz_h_query_qp(adapter_handle, my_qp->ipz_qp_handle,
2112                                 NULL, qpcb, my_qp->galpas.kernel);
2113
2114         if (h_ret != H_SUCCESS) {
2115                 ret = ehca2ib_return_code(h_ret);
2116                 ehca_err(srq->device, "hipz_h_query_qp() failed "
2117                          "ehca_qp=%p qp_num=%x h_ret=%lli",
2118                          my_qp, my_qp->real_qp_num, h_ret);
2119                 goto query_srq_exit1;
2120         }
2121
2122         srq_attr->max_wr = qpcb->max_nr_outst_recv_wr - 1;
2123         srq_attr->max_sge = 3;
2124         srq_attr->srq_limit = qpcb->curr_srq_limit;
2125
2126         if (ehca_debug_level >= 2)
2127                 ehca_dmp(qpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
2128
2129 query_srq_exit1:
2130         ehca_free_fw_ctrlblock(qpcb);
2131
2132         return ret;
2133 }
2134
2135 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
2136                                struct ib_uobject *uobject)
2137 {
2138         struct ehca_shca *shca = container_of(dev, struct ehca_shca, ib_device);
2139         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
2140                                              ib_pd);
2141         struct ehca_sport *sport = &shca->sport[my_qp->init_attr.port_num - 1];
2142         u32 qp_num = my_qp->real_qp_num;
2143         int ret;
2144         u64 h_ret;
2145         u8 port_num;
2146         int is_user = 0;
2147         enum ib_qp_type qp_type;
2148         unsigned long flags;
2149
2150         if (uobject) {
2151                 is_user = 1;
2152                 if (my_qp->mm_count_galpa ||
2153                     my_qp->mm_count_rqueue || my_qp->mm_count_squeue) {
2154                         ehca_err(dev, "Resources still referenced in "
2155                                  "user space qp_num=%x", qp_num);
2156                         return -EINVAL;
2157                 }
2158         }
2159
2160         if (my_qp->send_cq) {
2161                 ret = ehca_cq_unassign_qp(my_qp->send_cq, qp_num);
2162                 if (ret) {
2163                         ehca_err(dev, "Couldn't unassign qp from "
2164                                  "send_cq ret=%i qp_num=%x cq_num=%x", ret,
2165                                  qp_num, my_qp->send_cq->cq_number);
2166                         return ret;
2167                 }
2168         }
2169
2170         write_lock_irqsave(&ehca_qp_idr_lock, flags);
2171         idr_remove(&ehca_qp_idr, my_qp->token);
2172         write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
2173
2174         /*
2175          * SRQs will never get into an error list and do not have a recv_cq,
2176          * so we need to skip them here.
2177          */
2178         if (HAS_RQ(my_qp) && !IS_SRQ(my_qp) && !is_user)
2179                 del_from_err_list(my_qp->recv_cq, &my_qp->rq_err_node);
2180
2181         if (HAS_SQ(my_qp) && !is_user)
2182                 del_from_err_list(my_qp->send_cq, &my_qp->sq_err_node);
2183
2184         /* now wait until all pending events have completed */
2185         wait_event(my_qp->wait_completion, !atomic_read(&my_qp->nr_events));
2186
2187         h_ret = hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
2188         if (h_ret != H_SUCCESS) {
2189                 ehca_err(dev, "hipz_h_destroy_qp() failed h_ret=%lli "
2190                          "ehca_qp=%p qp_num=%x", h_ret, my_qp, qp_num);
2191                 return ehca2ib_return_code(h_ret);
2192         }
2193
2194         port_num = my_qp->init_attr.port_num;
2195         qp_type  = my_qp->init_attr.qp_type;
2196
2197         if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
2198                 spin_lock_irqsave(&sport->mod_sqp_lock, flags);
2199                 kfree(my_qp->mod_qp_parm);
2200                 my_qp->mod_qp_parm = NULL;
2201                 shca->sport[port_num - 1].ibqp_sqp[qp_type] = NULL;
2202                 spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
2203         }
2204
2205         /* no support for IB_QPT_SMI yet */
2206         if (qp_type == IB_QPT_GSI) {
2207                 struct ib_event event;
2208                 ehca_info(dev, "device %s: port %x is inactive.",
2209                                 shca->ib_device.name, port_num);
2210                 event.device = &shca->ib_device;
2211                 event.event = IB_EVENT_PORT_ERR;
2212                 event.element.port_num = port_num;
2213                 shca->sport[port_num - 1].port_state = IB_PORT_DOWN;
2214                 ib_dispatch_event(&event);
2215         }
2216
2217         if (HAS_RQ(my_qp)) {
2218                 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
2219                 if (!is_user)
2220                         vfree(my_qp->rq_map.map);
2221         }
2222         if (HAS_SQ(my_qp)) {
2223                 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
2224                 if (!is_user)
2225                         vfree(my_qp->sq_map.map);
2226         }
2227         kmem_cache_free(qp_cache, my_qp);
2228         atomic_dec(&shca->num_qps);
2229         return 0;
2230 }
2231
2232 int ehca_destroy_qp(struct ib_qp *qp)
2233 {
2234         return internal_destroy_qp(qp->device,
2235                                    container_of(qp, struct ehca_qp, ib_qp),
2236                                    qp->uobject);
2237 }
2238
2239 int ehca_destroy_srq(struct ib_srq *srq)
2240 {
2241         return internal_destroy_qp(srq->device,
2242                                    container_of(srq, struct ehca_qp, ib_srq),
2243                                    srq->uobject);
2244 }
2245
2246 int ehca_init_qp_cache(void)
2247 {
2248         qp_cache = kmem_cache_create("ehca_cache_qp",
2249                                      sizeof(struct ehca_qp), 0,
2250                                      SLAB_HWCACHE_ALIGN,
2251                                      NULL);
2252         if (!qp_cache)
2253                 return -ENOMEM;
2254         return 0;
2255 }
2256
2257 void ehca_cleanup_qp_cache(void)
2258 {
2259         if (qp_cache)
2260                 kmem_cache_destroy(qp_cache);
2261 }