drivers/infiniband/hw/ehca/ehca_qp.c

   1 /*
   2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
   3  *
   4  *  QP functions
   5  *
   6  *  Authors: Joachim Fenkes <fenkes@de.ibm.com>
   7  *           Stefan Roscher <stefan.roscher@de.ibm.com>
   8  *           Waleri Fomin <fomin@de.ibm.com>
   9  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
  10  *           Reinhard Ernst <rernst@de.ibm.com>
  11  *           Heiko J Schick <schickhj@de.ibm.com>
  12  *
  13  *  Copyright (c) 2005 IBM Corporation
  14  *
  15  *  All rights reserved.
  16  *
  17  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
  18  *  BSD.
  19  *
  20  * OpenIB BSD License
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions are met:
  24  *
  25  * Redistributions of source code must retain the above copyright notice, this
  26  * list of conditions and the following disclaimer.
  27  *
  28  * Redistributions in binary form must reproduce the above copyright notice,
  29  * this list of conditions and the following disclaimer in the documentation
  30  * and/or other materials
  31  * provided with the distribution.
  32  *
  33  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  34  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  35  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  36  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  37  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  38  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  39  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  40  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  41  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  42  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  43  * POSSIBILITY OF SUCH DAMAGE.
  44  */
  45
  46
  47 #include <asm/current.h>
  48
  49 #include "ehca_classes.h"
  50 #include "ehca_tools.h"
  51 #include "ehca_qes.h"
  52 #include "ehca_iverbs.h"
  53 #include "hcp_if.h"
  54 #include "hipz_fns.h"
  55
  56 static struct kmem_cache *qp_cache;
  57
  58 /*
  59  * attributes not supported by query qp
  60  */
  61 #define QP_ATTR_QUERY_NOT_SUPPORTED (IB_QP_MAX_DEST_RD_ATOMIC | \
  62                                      IB_QP_MAX_QP_RD_ATOMIC   | \
  63                                      IB_QP_ACCESS_FLAGS       | \
  64                                      IB_QP_EN_SQD_ASYNC_NOTIFY)
  65
  66 /*
  67  * ehca (internal) qp state values
  68  */
  69 enum ehca_qp_state {
  70         EHCA_QPS_RESET = 1,
  71         EHCA_QPS_INIT = 2,
  72         EHCA_QPS_RTR = 3,
  73         EHCA_QPS_RTS = 5,
  74         EHCA_QPS_SQD = 6,
  75         EHCA_QPS_SQE = 8,
  76         EHCA_QPS_ERR = 128
  77 };
  78
  79 /*
  80  * qp state transitions as defined by IB Arch Rel 1.1 page 431
  81  */
  82 enum ib_qp_statetrans {
  83         IB_QPST_ANY2RESET,
  84         IB_QPST_ANY2ERR,
  85         IB_QPST_RESET2INIT,
  86         IB_QPST_INIT2RTR,
  87         IB_QPST_INIT2INIT,
  88         IB_QPST_RTR2RTS,
  89         IB_QPST_RTS2SQD,
  90         IB_QPST_RTS2RTS,
  91         IB_QPST_SQD2RTS,
  92         IB_QPST_SQE2RTS,
  93         IB_QPST_SQD2SQD,
  94         IB_QPST_MAX     /* nr of transitions, this must be last!!! */
  95 };
  96
  97 /*
  98  * ib2ehca_qp_state maps IB to ehca qp_state
  99  * returns ehca qp state corresponding to given ib qp state
 100  */
 101 static inline enum ehca_qp_state ib2ehca_qp_state(enum ib_qp_state ib_qp_state)
 102 {
 103         switch (ib_qp_state) {
 104         case IB_QPS_RESET:
 105                 return EHCA_QPS_RESET;
 106         case IB_QPS_INIT:
 107                 return EHCA_QPS_INIT;
 108         case IB_QPS_RTR:
 109                 return EHCA_QPS_RTR;
 110         case IB_QPS_RTS:
 111                 return EHCA_QPS_RTS;
 112         case IB_QPS_SQD:
 113                 return EHCA_QPS_SQD;
 114         case IB_QPS_SQE:
 115                 return EHCA_QPS_SQE;
 116         case IB_QPS_ERR:
 117                 return EHCA_QPS_ERR;
 118         default:
 119                 ehca_gen_err("invalid ib_qp_state=%x", ib_qp_state);
 120                 return -EINVAL;
 121         }
 122 }
 123
 124 /*
 125  * ehca2ib_qp_state maps ehca to IB qp_state
 126  * returns ib qp state corresponding to given ehca qp state
 127  */
 128 static inline enum ib_qp_state ehca2ib_qp_state(enum ehca_qp_state
 129                                                 ehca_qp_state)
 130 {
 131         switch (ehca_qp_state) {
 132         case EHCA_QPS_RESET:
 133                 return IB_QPS_RESET;
 134         case EHCA_QPS_INIT:
 135                 return IB_QPS_INIT;
 136         case EHCA_QPS_RTR:
 137                 return IB_QPS_RTR;
 138         case EHCA_QPS_RTS:
 139                 return IB_QPS_RTS;
 140         case EHCA_QPS_SQD:
 141                 return IB_QPS_SQD;
 142         case EHCA_QPS_SQE:
 143                 return IB_QPS_SQE;
 144         case EHCA_QPS_ERR:
 145                 return IB_QPS_ERR;
 146         default:
 147                 ehca_gen_err("invalid ehca_qp_state=%x", ehca_qp_state);
 148                 return -EINVAL;
 149         }
 150 }
 151
 152 /*
 153  * ehca_qp_type used as index for req_attr and opt_attr of
 154  * struct ehca_modqp_statetrans
 155  */
 156 enum ehca_qp_type {
 157         QPT_RC = 0,
 158         QPT_UC = 1,
 159         QPT_UD = 2,
 160         QPT_SQP = 3,
 161         QPT_MAX
 162 };
 163
 164 /*
 165  * ib2ehcaqptype maps Ib to ehca qp_type
 166  * returns ehca qp type corresponding to ib qp type
 167  */
 168 static inline enum ehca_qp_type ib2ehcaqptype(enum ib_qp_type ibqptype)
 169 {
 170         switch (ibqptype) {
 171         case IB_QPT_SMI:
 172         case IB_QPT_GSI:
 173                 return QPT_SQP;
 174         case IB_QPT_RC:
 175                 return QPT_RC;
 176         case IB_QPT_UC:
 177                 return QPT_UC;
 178         case IB_QPT_UD:
 179                 return QPT_UD;
 180         default:
 181                 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
 182                 return -EINVAL;
 183         }
 184 }
 185
 186 static inline enum ib_qp_statetrans get_modqp_statetrans(int ib_fromstate,
 187                                                          int ib_tostate)
 188 {
 189         int index = -EINVAL;
 190         switch (ib_tostate) {
 191         case IB_QPS_RESET:
 192                 index = IB_QPST_ANY2RESET;
 193                 break;
 194         case IB_QPS_INIT:
 195                 switch (ib_fromstate) {
 196                 case IB_QPS_RESET:
 197                         index = IB_QPST_RESET2INIT;
 198                         break;
 199                 case IB_QPS_INIT:
 200                         index = IB_QPST_INIT2INIT;
 201                         break;
 202                 }
 203                 break;
 204         case IB_QPS_RTR:
 205                 if (ib_fromstate == IB_QPS_INIT)
 206                         index = IB_QPST_INIT2RTR;
 207                 break;
 208         case IB_QPS_RTS:
 209                 switch (ib_fromstate) {
 210                 case IB_QPS_RTR:
 211                         index = IB_QPST_RTR2RTS;
 212                         break;
 213                 case IB_QPS_RTS:
 214                         index = IB_QPST_RTS2RTS;
 215                         break;
 216                 case IB_QPS_SQD:
 217                         index = IB_QPST_SQD2RTS;
 218                         break;
 219                 case IB_QPS_SQE:
 220                         index = IB_QPST_SQE2RTS;
 221                         break;
 222                 }
 223                 break;
 224         case IB_QPS_SQD:
 225                 if (ib_fromstate == IB_QPS_RTS)
 226                         index = IB_QPST_RTS2SQD;
 227                 break;
 228         case IB_QPS_SQE:
 229                 break;
 230         case IB_QPS_ERR:
 231                 index = IB_QPST_ANY2ERR;
 232                 break;
 233         default:
 234                 break;
 235         }
 236         return index;
 237 }
 238
 239 /*
 240  * ibqptype2servicetype returns hcp service type corresponding to given
 241  * ib qp type used by create_qp()
 242  */
 243 static inline int ibqptype2servicetype(enum ib_qp_type ibqptype)
 244 {
 245         switch (ibqptype) {
 246         case IB_QPT_SMI:
 247         case IB_QPT_GSI:
 248                 return ST_UD;
 249         case IB_QPT_RC:
 250                 return ST_RC;
 251         case IB_QPT_UC:
 252                 return ST_UC;
 253         case IB_QPT_UD:
 254                 return ST_UD;
 255         case IB_QPT_RAW_IPV6:
 256                 return -EINVAL;
 257         case IB_QPT_RAW_ETY:
 258                 return -EINVAL;
 259         default:
 260                 ehca_gen_err("Invalid ibqptype=%x", ibqptype);
 261                 return -EINVAL;
 262         }
 263 }
 264
 265 /*
 266  * init userspace queue info from ipz_queue data
 267  */
 268 static inline void queue2resp(struct ipzu_queue_resp *resp,
 269                               struct ipz_queue *queue)
 270 {
 271         resp->qe_size = queue->qe_size;
 272         resp->act_nr_of_sg = queue->act_nr_of_sg;
 273         resp->queue_length = queue->queue_length;
 274         resp->pagesize = queue->pagesize;
 275         resp->toggle_state = queue->toggle_state;
 276         resp->offset = queue->offset;
 277 }
 278
 279 /*
 280  * init_qp_queue initializes/constructs r/squeue and registers queue pages.
 281  */
 282 static inline int init_qp_queue(struct ehca_shca *shca,
 283                                 struct ehca_pd *pd,
 284                                 struct ehca_qp *my_qp,
 285                                 struct ipz_queue *queue,
 286                                 int q_type,
 287                                 u64 expected_hret,
 288                                 struct ehca_alloc_queue_parms *parms,
 289                                 int wqe_size)
 290 {
 291         int ret, cnt, ipz_rc, nr_q_pages;
 292         void *vpage;
 293         u64 rpage, h_ret;
 294         struct ib_device *ib_dev = &shca->ib_device;
 295         struct ipz_adapter_handle ipz_hca_handle = shca->ipz_hca_handle;
 296
 297         if (!parms->queue_size)
 298                 return 0;
 299
 300         if (parms->is_small) {
 301                 nr_q_pages = 1;
 302                 ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
 303                                         128 << parms->page_size,
 304                                         wqe_size, parms->act_nr_sges, 1);
 305         } else {
 306                 nr_q_pages = parms->queue_size;
 307                 ipz_rc = ipz_queue_ctor(pd, queue, nr_q_pages,
 308                                         EHCA_PAGESIZE, wqe_size,
 309                                         parms->act_nr_sges, 0);
 310         }
 311
 312         if (!ipz_rc) {
 313                 ehca_err(ib_dev, "Cannot allocate page for queue. ipz_rc=%i",
 314                          ipz_rc);
 315                 return -EBUSY;
 316         }
 317
 318         /* register queue pages */
 319         for (cnt = 0; cnt < nr_q_pages; cnt++) {
 320                 vpage = ipz_qpageit_get_inc(queue);
 321                 if (!vpage) {
 322                         ehca_err(ib_dev, "ipz_qpageit_get_inc() "
 323                                  "failed p_vpage= %p", vpage);
 324                         ret = -EINVAL;
 325                         goto init_qp_queue1;
 326                 }
 327                 rpage = virt_to_abs(vpage);
 328
 329                 h_ret = hipz_h_register_rpage_qp(ipz_hca_handle,
 330                                                  my_qp->ipz_qp_handle,
 331                                                  NULL, 0, q_type,
 332                                                  rpage, parms->is_small ? 0 : 1,
 333                                                  my_qp->galpas.kernel);
 334                 if (cnt == (nr_q_pages - 1)) {  /* last page! */
 335                         if (h_ret != expected_hret) {
 336                                 ehca_err(ib_dev, "hipz_qp_register_rpage() "
 337                                          "h_ret=%li", h_ret);
 338                                 ret = ehca2ib_return_code(h_ret);
 339                                 goto init_qp_queue1;
 340                         }
 341                         vpage = ipz_qpageit_get_inc(&my_qp->ipz_rqueue);
 342                         if (vpage) {
 343                                 ehca_err(ib_dev, "ipz_qpageit_get_inc() "
 344                                          "should not succeed vpage=%p", vpage);
 345                                 ret = -EINVAL;
 346                                 goto init_qp_queue1;
 347                         }
 348                 } else {
 349                         if (h_ret != H_PAGE_REGISTERED) {
 350                                 ehca_err(ib_dev, "hipz_qp_register_rpage() "
 351                                          "h_ret=%li", h_ret);
 352                                 ret = ehca2ib_return_code(h_ret);
 353                                 goto init_qp_queue1;
 354                         }
 355                 }
 356         }
 357
 358         ipz_qeit_reset(queue);
 359
 360         return 0;
 361
 362 init_qp_queue1:
 363         ipz_queue_dtor(pd, queue);
 364         return ret;
 365 }
 366
 367 static inline int ehca_calc_wqe_size(int act_nr_sge, int is_llqp)
 368 {
 369         if (is_llqp)
 370                 return 128 << act_nr_sge;
 371         else
 372                 return offsetof(struct ehca_wqe,
 373                                 u.nud.sg_list[act_nr_sge]);
 374 }
 375
 376 static void ehca_determine_small_queue(struct ehca_alloc_queue_parms *queue,
 377                                        int req_nr_sge, int is_llqp)
 378 {
 379         u32 wqe_size, q_size;
 380         int act_nr_sge = req_nr_sge;
 381
 382         if (!is_llqp)
 383                 /* round up #SGEs so WQE size is a power of 2 */
 384                 for (act_nr_sge = 4; act_nr_sge <= 252;
 385                      act_nr_sge = 4 + 2 * act_nr_sge)
 386                         if (act_nr_sge >= req_nr_sge)
 387                                 break;
 388
 389         wqe_size = ehca_calc_wqe_size(act_nr_sge, is_llqp);
 390         q_size = wqe_size * (queue->max_wr + 1);
 391
 392         if (q_size <= 512)
 393                 queue->page_size = 2;
 394         else if (q_size <= 1024)
 395                 queue->page_size = 3;
 396         else
 397                 queue->page_size = 0;
 398
 399         queue->is_small = (queue->page_size != 0);
 400 }
 401
 402 /*
 403  * Create an ib_qp struct that is either a QP or an SRQ, depending on
 404  * the value of the is_srq parameter. If init_attr and srq_init_attr share
 405  * fields, the field out of init_attr is used.
 406  */
 407 static struct ehca_qp *internal_create_qp(
 408         struct ib_pd *pd,
 409         struct ib_qp_init_attr *init_attr,
 410         struct ib_srq_init_attr *srq_init_attr,
 411         struct ib_udata *udata, int is_srq)
 412 {
 413         struct ehca_qp *my_qp;
 414         struct ehca_pd *my_pd = container_of(pd, struct ehca_pd, ib_pd);
 415         struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
 416                                               ib_device);
 417         struct ib_ucontext *context = NULL;
 418         u64 h_ret;
 419         int is_llqp = 0, has_srq = 0;
 420         int qp_type, max_send_sge, max_recv_sge, ret;
 421
 422         /* h_call's out parameters */
 423         struct ehca_alloc_qp_parms parms;
 424         u32 swqe_size = 0, rwqe_size = 0, ib_qp_num;
 425         unsigned long flags;
 426
 427         memset(&parms, 0, sizeof(parms));
 428         qp_type = init_attr->qp_type;
 429
 430         if (init_attr->sq_sig_type != IB_SIGNAL_REQ_WR &&
 431                 init_attr->sq_sig_type != IB_SIGNAL_ALL_WR) {
 432                 ehca_err(pd->device, "init_attr->sg_sig_type=%x not allowed",
 433                          init_attr->sq_sig_type);
 434                 return ERR_PTR(-EINVAL);
 435         }
 436
 437         /* save LLQP info */
 438         if (qp_type & 0x80) {
 439                 is_llqp = 1;
 440                 parms.ext_type = EQPT_LLQP;
 441                 parms.ll_comp_flags = qp_type & LLQP_COMP_MASK;
 442         }
 443         qp_type &= 0x1F;
 444         init_attr->qp_type &= 0x1F;
 445
 446         /* handle SRQ base QPs */
 447         if (init_attr->srq) {
 448                 struct ehca_qp *my_srq =
 449                         container_of(init_attr->srq, struct ehca_qp, ib_srq);
 450
 451                 has_srq = 1;
 452                 parms.ext_type = EQPT_SRQBASE;
 453                 parms.srq_qpn = my_srq->real_qp_num;
 454         }
 455
 456         if (is_llqp && has_srq) {
 457                 ehca_err(pd->device, "LLQPs can't have an SRQ");
 458                 return ERR_PTR(-EINVAL);
 459         }
 460
 461         /* handle SRQs */
 462         if (is_srq) {
 463                 parms.ext_type = EQPT_SRQ;
 464                 parms.srq_limit = srq_init_attr->attr.srq_limit;
 465                 if (init_attr->cap.max_recv_sge > 3) {
 466                         ehca_err(pd->device, "no more than three SGEs "
 467                                  "supported for SRQ  pd=%p  max_sge=%x",
 468                                  pd, init_attr->cap.max_recv_sge);
 469                         return ERR_PTR(-EINVAL);
 470                 }
 471         }
 472
 473         /* check QP type */
 474         if (qp_type != IB_QPT_UD &&
 475             qp_type != IB_QPT_UC &&
 476             qp_type != IB_QPT_RC &&
 477             qp_type != IB_QPT_SMI &&
 478             qp_type != IB_QPT_GSI) {
 479                 ehca_err(pd->device, "wrong QP Type=%x", qp_type);
 480                 return ERR_PTR(-EINVAL);
 481         }
 482
 483         if (is_llqp) {
 484                 switch (qp_type) {
 485                 case IB_QPT_RC:
 486                         if ((init_attr->cap.max_send_wr > 255) ||
 487                             (init_attr->cap.max_recv_wr > 255)) {
 488                                 ehca_err(pd->device,
 489                                          "Invalid Number of max_sq_wr=%x "
 490                                          "or max_rq_wr=%x for RC LLQP",
 491                                          init_attr->cap.max_send_wr,
 492                                          init_attr->cap.max_recv_wr);
 493                                 return ERR_PTR(-EINVAL);
 494                         }
 495                         break;
 496                 case IB_QPT_UD:
 497                         if (!EHCA_BMASK_GET(HCA_CAP_UD_LL_QP, shca->hca_cap)) {
 498                                 ehca_err(pd->device, "UD LLQP not supported "
 499                                          "by this adapter");
 500                                 return ERR_PTR(-ENOSYS);
 501                         }
 502                         if (!(init_attr->cap.max_send_sge <= 5
 503                             && init_attr->cap.max_send_sge >= 1
 504                             && init_attr->cap.max_recv_sge <= 5
 505                             && init_attr->cap.max_recv_sge >= 1)) {
 506                                 ehca_err(pd->device,
 507                                          "Invalid Number of max_send_sge=%x "
 508                                          "or max_recv_sge=%x for UD LLQP",
 509                                          init_attr->cap.max_send_sge,
 510                                          init_attr->cap.max_recv_sge);
 511                                 return ERR_PTR(-EINVAL);
 512                         } else if (init_attr->cap.max_send_wr > 255) {
 513                                 ehca_err(pd->device,
 514                                          "Invalid Number of "
 515                                          "max_send_wr=%x for UD QP_TYPE=%x",
 516                                          init_attr->cap.max_send_wr, qp_type);
 517                                 return ERR_PTR(-EINVAL);
 518                         }
 519                         break;
 520                 default:
 521                         ehca_err(pd->device, "unsupported LL QP Type=%x",
 522                                  qp_type);
 523                         return ERR_PTR(-EINVAL);
 524                         break;
 525                 }
 526         } else {
 527                 int max_sge = (qp_type == IB_QPT_UD || qp_type == IB_QPT_SMI
 528                                || qp_type == IB_QPT_GSI) ? 250 : 252;
 529
 530                 if (init_attr->cap.max_send_sge > max_sge
 531                     || init_attr->cap.max_recv_sge > max_sge) {
 532                         ehca_err(pd->device, "Invalid number of SGEs requested "
 533                                  "send_sge=%x recv_sge=%x max_sge=%x",
 534                                  init_attr->cap.max_send_sge,
 535                                  init_attr->cap.max_recv_sge, max_sge);
 536                         return ERR_PTR(-EINVAL);
 537                 }
 538         }
 539
 540         if (pd->uobject && udata)
 541                 context = pd->uobject->context;
 542
 543         my_qp = kmem_cache_zalloc(qp_cache, GFP_KERNEL);
 544         if (!my_qp) {
 545                 ehca_err(pd->device, "pd=%p not enough memory to alloc qp", pd);
 546                 return ERR_PTR(-ENOMEM);
 547         }
 548
 549         spin_lock_init(&my_qp->spinlock_s);
 550         spin_lock_init(&my_qp->spinlock_r);
 551         my_qp->qp_type = qp_type;
 552         my_qp->ext_type = parms.ext_type;
 553
 554         if (init_attr->recv_cq)
 555                 my_qp->recv_cq =
 556                         container_of(init_attr->recv_cq, struct ehca_cq, ib_cq);
 557         if (init_attr->send_cq)
 558                 my_qp->send_cq =
 559                         container_of(init_attr->send_cq, struct ehca_cq, ib_cq);
 560
 561         do {
 562                 if (!idr_pre_get(&ehca_qp_idr, GFP_KERNEL)) {
 563                         ret = -ENOMEM;
 564                         ehca_err(pd->device, "Can't reserve idr resources.");
 565                         goto create_qp_exit0;
 566                 }
 567
 568                 write_lock_irqsave(&ehca_qp_idr_lock, flags);
 569                 ret = idr_get_new(&ehca_qp_idr, my_qp, &my_qp->token);
 570                 write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 571         } while (ret == -EAGAIN);
 572
 573         if (ret) {
 574                 ret = -ENOMEM;
 575                 ehca_err(pd->device, "Can't allocate new idr entry.");
 576                 goto create_qp_exit0;
 577         }
 578
 579         if (my_qp->token > 0x1FFFFFF) {
 580                 ret = -EINVAL;
 581                 ehca_err(pd->device, "Invalid number of qp");
 582                 goto create_qp_exit1;
 583         }
 584
 585         if (has_srq)
 586                 parms.srq_token = my_qp->token;
 587
 588         parms.servicetype = ibqptype2servicetype(qp_type);
 589         if (parms.servicetype < 0) {
 590                 ret = -EINVAL;
 591                 ehca_err(pd->device, "Invalid qp_type=%x", qp_type);
 592                 goto create_qp_exit1;
 593         }
 594
 595         /* Always signal by WQE so we can hide circ. WQEs */
 596         parms.sigtype = HCALL_SIGT_BY_WQE;
 597
 598         /* UD_AV CIRCUMVENTION */
 599         max_send_sge = init_attr->cap.max_send_sge;
 600         max_recv_sge = init_attr->cap.max_recv_sge;
 601         if (parms.servicetype == ST_UD && !is_llqp) {
 602                 max_send_sge += 2;
 603                 max_recv_sge += 2;
 604         }
 605
 606         parms.token = my_qp->token;
 607         parms.eq_handle = shca->eq.ipz_eq_handle;
 608         parms.pd = my_pd->fw_pd;
 609         if (my_qp->send_cq)
 610                 parms.send_cq_handle = my_qp->send_cq->ipz_cq_handle;
 611         if (my_qp->recv_cq)
 612                 parms.recv_cq_handle = my_qp->recv_cq->ipz_cq_handle;
 613
 614         parms.squeue.max_wr = init_attr->cap.max_send_wr;
 615         parms.rqueue.max_wr = init_attr->cap.max_recv_wr;
 616         parms.squeue.max_sge = max_send_sge;
 617         parms.rqueue.max_sge = max_recv_sge;
 618
 619         /* RC QPs need one more SWQE for unsolicited ack circumvention */
 620         if (qp_type == IB_QPT_RC)
 621                 parms.squeue.max_wr++;
 622
 623         if (EHCA_BMASK_GET(HCA_CAP_MINI_QP, shca->hca_cap)) {
 624                 if (HAS_SQ(my_qp))
 625                         ehca_determine_small_queue(
 626                                 &parms.squeue, max_send_sge, is_llqp);
 627                 if (HAS_RQ(my_qp))
 628                         ehca_determine_small_queue(
 629                                 &parms.rqueue, max_recv_sge, is_llqp);
 630                 parms.qp_storage =
 631                         (parms.squeue.is_small || parms.rqueue.is_small);
 632         }
 633
 634         h_ret = hipz_h_alloc_resource_qp(shca->ipz_hca_handle, &parms);
 635         if (h_ret != H_SUCCESS) {
 636                 ehca_err(pd->device, "h_alloc_resource_qp() failed h_ret=%li",
 637                          h_ret);
 638                 ret = ehca2ib_return_code(h_ret);
 639                 goto create_qp_exit1;
 640         }
 641
 642         ib_qp_num = my_qp->real_qp_num = parms.real_qp_num;
 643         my_qp->ipz_qp_handle = parms.qp_handle;
 644         my_qp->galpas = parms.galpas;
 645
 646         swqe_size = ehca_calc_wqe_size(parms.squeue.act_nr_sges, is_llqp);
 647         rwqe_size = ehca_calc_wqe_size(parms.rqueue.act_nr_sges, is_llqp);
 648
 649         switch (qp_type) {
 650         case IB_QPT_RC:
 651                 if (is_llqp) {
 652                         parms.squeue.act_nr_sges = 1;
 653                         parms.rqueue.act_nr_sges = 1;
 654                 }
 655                 /* hide the extra WQE */
 656                 parms.squeue.act_nr_wqes--;
 657                 break;
 658         case IB_QPT_UD:
 659         case IB_QPT_GSI:
 660         case IB_QPT_SMI:
 661                 /* UD circumvention */
 662                 if (is_llqp) {
 663                         parms.squeue.act_nr_sges = 1;
 664                         parms.rqueue.act_nr_sges = 1;
 665                 } else {
 666                         parms.squeue.act_nr_sges -= 2;
 667                         parms.rqueue.act_nr_sges -= 2;
 668                 }
 669
 670                 if (IB_QPT_GSI == qp_type || IB_QPT_SMI == qp_type) {
 671                         parms.squeue.act_nr_wqes = init_attr->cap.max_send_wr;
 672                         parms.rqueue.act_nr_wqes = init_attr->cap.max_recv_wr;
 673                         parms.squeue.act_nr_sges = init_attr->cap.max_send_sge;
 674                         parms.rqueue.act_nr_sges = init_attr->cap.max_recv_sge;
 675                         ib_qp_num = (qp_type == IB_QPT_SMI) ? 0 : 1;
 676                 }
 677
 678                 break;
 679
 680         default:
 681                 break;
 682         }
 683
 684         /* initialize r/squeue and register queue pages */
 685         if (HAS_SQ(my_qp)) {
 686                 ret = init_qp_queue(
 687                         shca, my_pd, my_qp, &my_qp->ipz_squeue, 0,
 688                         HAS_RQ(my_qp) ? H_PAGE_REGISTERED : H_SUCCESS,
 689                         &parms.squeue, swqe_size);
 690                 if (ret) {
 691                         ehca_err(pd->device, "Couldn't initialize squeue "
 692                                  "and pages ret=%i", ret);
 693                         goto create_qp_exit2;
 694                 }
 695         }
 696
 697         if (HAS_RQ(my_qp)) {
 698                 ret = init_qp_queue(
 699                         shca, my_pd, my_qp, &my_qp->ipz_rqueue, 1,
 700                         H_SUCCESS, &parms.rqueue, rwqe_size);
 701                 if (ret) {
 702                         ehca_err(pd->device, "Couldn't initialize rqueue "
 703                                  "and pages ret=%i", ret);
 704                         goto create_qp_exit3;
 705                 }
 706         }
 707
 708         if (is_srq) {
 709                 my_qp->ib_srq.pd = &my_pd->ib_pd;
 710                 my_qp->ib_srq.device = my_pd->ib_pd.device;
 711
 712                 my_qp->ib_srq.srq_context = init_attr->qp_context;
 713                 my_qp->ib_srq.event_handler = init_attr->event_handler;
 714         } else {
 715                 my_qp->ib_qp.qp_num = ib_qp_num;
 716                 my_qp->ib_qp.pd = &my_pd->ib_pd;
 717                 my_qp->ib_qp.device = my_pd->ib_pd.device;
 718
 719                 my_qp->ib_qp.recv_cq = init_attr->recv_cq;
 720                 my_qp->ib_qp.send_cq = init_attr->send_cq;
 721
 722                 my_qp->ib_qp.qp_type = qp_type;
 723                 my_qp->ib_qp.srq = init_attr->srq;
 724
 725                 my_qp->ib_qp.qp_context = init_attr->qp_context;
 726                 my_qp->ib_qp.event_handler = init_attr->event_handler;
 727         }
 728
 729         init_attr->cap.max_inline_data = 0; /* not supported yet */
 730         init_attr->cap.max_recv_sge = parms.rqueue.act_nr_sges;
 731         init_attr->cap.max_recv_wr = parms.rqueue.act_nr_wqes;
 732         init_attr->cap.max_send_sge = parms.squeue.act_nr_sges;
 733         init_attr->cap.max_send_wr = parms.squeue.act_nr_wqes;
 734         my_qp->init_attr = *init_attr;
 735
 736         if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
 737                 shca->sport[init_attr->port_num - 1].ibqp_sqp[qp_type] =
 738                         &my_qp->ib_qp;
 739                 if (ehca_nr_ports < 0) {
 740                         /* alloc array to cache subsequent modify qp parms
 741                          * for autodetect mode
 742                          */
 743                         my_qp->mod_qp_parm =
 744                                 kzalloc(EHCA_MOD_QP_PARM_MAX *
 745                                         sizeof(*my_qp->mod_qp_parm),
 746                                         GFP_KERNEL);
 747                         if (!my_qp->mod_qp_parm) {
 748                                 ehca_err(pd->device,
 749                                          "Could not alloc mod_qp_parm");
 750                                 goto create_qp_exit4;
 751                         }
 752                 }
 753         }
 754
 755         /* NOTE: define_apq0() not supported yet */
 756         if (qp_type == IB_QPT_GSI) {
 757                 h_ret = ehca_define_sqp(shca, my_qp, init_attr);
 758                 if (h_ret != H_SUCCESS) {
 759                         ret = ehca2ib_return_code(h_ret);
 760                         goto create_qp_exit5;
 761                 }
 762         }
 763
 764         if (my_qp->send_cq) {
 765                 ret = ehca_cq_assign_qp(my_qp->send_cq, my_qp);
 766                 if (ret) {
 767                         ehca_err(pd->device,
 768                                  "Couldn't assign qp to send_cq ret=%i", ret);
 769                         goto create_qp_exit5;
 770                 }
 771         }
 772
 773         /* copy queues, galpa data to user space */
 774         if (context && udata) {
 775                 struct ehca_create_qp_resp resp;
 776                 memset(&resp, 0, sizeof(resp));
 777
 778                 resp.qp_num = my_qp->real_qp_num;
 779                 resp.token = my_qp->token;
 780                 resp.qp_type = my_qp->qp_type;
 781                 resp.ext_type = my_qp->ext_type;
 782                 resp.qkey = my_qp->qkey;
 783                 resp.real_qp_num = my_qp->real_qp_num;
 784
 785                 if (HAS_SQ(my_qp))
 786                         queue2resp(&resp.ipz_squeue, &my_qp->ipz_squeue);
 787                 if (HAS_RQ(my_qp))
 788                         queue2resp(&resp.ipz_rqueue, &my_qp->ipz_rqueue);
 789                 resp.fw_handle_ofs = (u32)
 790                         (my_qp->galpas.user.fw_handle & (PAGE_SIZE - 1));
 791
 792                 if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
 793                         ehca_err(pd->device, "Copy to udata failed");
 794                         ret = -EINVAL;
 795                         goto create_qp_exit6;
 796                 }
 797         }
 798
 799         return my_qp;
 800
 801 create_qp_exit6:
 802         ehca_cq_unassign_qp(my_qp->send_cq, my_qp->real_qp_num);
 803
 804 create_qp_exit5:
 805         kfree(my_qp->mod_qp_parm);
 806
 807 create_qp_exit4:
 808         if (HAS_RQ(my_qp))
 809                 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
 810
 811 create_qp_exit3:
 812         if (HAS_SQ(my_qp))
 813                 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
 814
 815 create_qp_exit2:
 816         hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
 817
 818 create_qp_exit1:
 819         write_lock_irqsave(&ehca_qp_idr_lock, flags);
 820         idr_remove(&ehca_qp_idr, my_qp->token);
 821         write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
 822
 823 create_qp_exit0:
 824         kmem_cache_free(qp_cache, my_qp);
 825         return ERR_PTR(ret);
 826 }
 827
 828 struct ib_qp *ehca_create_qp(struct ib_pd *pd,
 829                              struct ib_qp_init_attr *qp_init_attr,
 830                              struct ib_udata *udata)
 831 {
 832         struct ehca_qp *ret;
 833
 834         ret = internal_create_qp(pd, qp_init_attr, NULL, udata, 0);
 835         return IS_ERR(ret) ? (struct ib_qp *)ret : &ret->ib_qp;
 836 }
 837
 838 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
 839                                struct ib_uobject *uobject);
 840
 841 struct ib_srq *ehca_create_srq(struct ib_pd *pd,
 842                                struct ib_srq_init_attr *srq_init_attr,
 843                                struct ib_udata *udata)
 844 {
 845         struct ib_qp_init_attr qp_init_attr;
 846         struct ehca_qp *my_qp;
 847         struct ib_srq *ret;
 848         struct ehca_shca *shca = container_of(pd->device, struct ehca_shca,
 849                                               ib_device);
 850         struct hcp_modify_qp_control_block *mqpcb;
 851         u64 hret, update_mask;
 852
 853         /* For common attributes, internal_create_qp() takes its info
 854          * out of qp_init_attr, so copy all common attrs there.
 855          */
 856         memset(&qp_init_attr, 0, sizeof(qp_init_attr));
 857         qp_init_attr.event_handler = srq_init_attr->event_handler;
 858         qp_init_attr.qp_context = srq_init_attr->srq_context;
 859         qp_init_attr.sq_sig_type = IB_SIGNAL_ALL_WR;
 860         qp_init_attr.qp_type = IB_QPT_RC;
 861         qp_init_attr.cap.max_recv_wr = srq_init_attr->attr.max_wr;
 862         qp_init_attr.cap.max_recv_sge = srq_init_attr->attr.max_sge;
 863
 864         my_qp = internal_create_qp(pd, &qp_init_attr, srq_init_attr, udata, 1);
 865         if (IS_ERR(my_qp))
 866                 return (struct ib_srq *)my_qp;
 867
 868         /* copy back return values */
 869         srq_init_attr->attr.max_wr = qp_init_attr.cap.max_recv_wr;
 870         srq_init_attr->attr.max_sge = 3;
 871
 872         /* drive SRQ into RTR state */
 873         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
 874         if (!mqpcb) {
 875                 ehca_err(pd->device, "Could not get zeroed page for mqpcb "
 876                          "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
 877                 ret = ERR_PTR(-ENOMEM);
 878                 goto create_srq1;
 879         }
 880
 881         mqpcb->qp_state = EHCA_QPS_INIT;
 882         mqpcb->prim_phys_port = 1;
 883         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
 884         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
 885                                 my_qp->ipz_qp_handle,
 886                                 &my_qp->pf,
 887                                 update_mask,
 888                                 mqpcb, my_qp->galpas.kernel);
 889         if (hret != H_SUCCESS) {
 890                 ehca_err(pd->device, "Could not modify SRQ to INIT "
 891                          "ehca_qp=%p qp_num=%x h_ret=%li",
 892                          my_qp, my_qp->real_qp_num, hret);
 893                 goto create_srq2;
 894         }
 895
 896         mqpcb->qp_enable = 1;
 897         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
 898         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
 899                                 my_qp->ipz_qp_handle,
 900                                 &my_qp->pf,
 901                                 update_mask,
 902                                 mqpcb, my_qp->galpas.kernel);
 903         if (hret != H_SUCCESS) {
 904                 ehca_err(pd->device, "Could not enable SRQ "
 905                          "ehca_qp=%p qp_num=%x h_ret=%li",
 906                          my_qp, my_qp->real_qp_num, hret);
 907                 goto create_srq2;
 908         }
 909
 910         mqpcb->qp_state  = EHCA_QPS_RTR;
 911         update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
 912         hret = hipz_h_modify_qp(shca->ipz_hca_handle,
 913                                 my_qp->ipz_qp_handle,
 914                                 &my_qp->pf,
 915                                 update_mask,
 916                                 mqpcb, my_qp->galpas.kernel);
 917         if (hret != H_SUCCESS) {
 918                 ehca_err(pd->device, "Could not modify SRQ to RTR "
 919                          "ehca_qp=%p qp_num=%x h_ret=%li",
 920                          my_qp, my_qp->real_qp_num, hret);
 921                 goto create_srq2;
 922         }
 923
 924         ehca_free_fw_ctrlblock(mqpcb);
 925
 926         return &my_qp->ib_srq;
 927
 928 create_srq2:
 929         ret = ERR_PTR(ehca2ib_return_code(hret));
 930         ehca_free_fw_ctrlblock(mqpcb);
 931
 932 create_srq1:
 933         internal_destroy_qp(pd->device, my_qp, my_qp->ib_srq.uobject);
 934
 935         return ret;
 936 }
 937
 938 /*
 939  * prepare_sqe_rts called by internal_modify_qp() at trans sqe -> rts
 940  * set purge bit of bad wqe and subsequent wqes to avoid reentering sqe
 941  * returns total number of bad wqes in bad_wqe_cnt
 942  */
 943 static int prepare_sqe_rts(struct ehca_qp *my_qp, struct ehca_shca *shca,
 944                            int *bad_wqe_cnt)
 945 {
 946         u64 h_ret;
 947         struct ipz_queue *squeue;
 948         void *bad_send_wqe_p, *bad_send_wqe_v;
 949         u64 q_ofs;
 950         struct ehca_wqe *wqe;
 951         int qp_num = my_qp->ib_qp.qp_num;
 952
 953         /* get send wqe pointer */
 954         h_ret = hipz_h_disable_and_get_wqe(shca->ipz_hca_handle,
 955                                            my_qp->ipz_qp_handle, &my_qp->pf,
 956                                            &bad_send_wqe_p, NULL, 2);
 957         if (h_ret != H_SUCCESS) {
 958                 ehca_err(&shca->ib_device, "hipz_h_disable_and_get_wqe() failed"
 959                          " ehca_qp=%p qp_num=%x h_ret=%li",
 960                          my_qp, qp_num, h_ret);
 961                 return ehca2ib_return_code(h_ret);
 962         }
 963         bad_send_wqe_p = (void *)((u64)bad_send_wqe_p & (~(1L << 63)));
 964         ehca_dbg(&shca->ib_device, "qp_num=%x bad_send_wqe_p=%p",
 965                  qp_num, bad_send_wqe_p);
 966         /* convert wqe pointer to vadr */
 967         bad_send_wqe_v = abs_to_virt((u64)bad_send_wqe_p);
 968         if (ehca_debug_level)
 969                 ehca_dmp(bad_send_wqe_v, 32, "qp_num=%x bad_wqe", qp_num);
 970         squeue = &my_qp->ipz_squeue;
 971         if (ipz_queue_abs_to_offset(squeue, (u64)bad_send_wqe_p, &q_ofs)) {
 972                 ehca_err(&shca->ib_device, "failed to get wqe offset qp_num=%x"
 973                          " bad_send_wqe_p=%p", qp_num, bad_send_wqe_p);
 974                 return -EFAULT;
 975         }
 976
 977         /* loop sets wqe's purge bit */
 978         wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
 979         *bad_wqe_cnt = 0;
 980         while (wqe->optype != 0xff && wqe->wqef != 0xff) {
 981                 if (ehca_debug_level)
 982                         ehca_dmp(wqe, 32, "qp_num=%x wqe", qp_num);
 983                 wqe->nr_of_data_seg = 0; /* suppress data access */
 984                 wqe->wqef = WQEF_PURGE; /* WQE to be purged */
 985                 q_ofs = ipz_queue_advance_offset(squeue, q_ofs);
 986                 wqe = (struct ehca_wqe *)ipz_qeit_calc(squeue, q_ofs);
 987                 *bad_wqe_cnt = (*bad_wqe_cnt)+1;
 988         }
 989         /*
 990          * bad wqe will be reprocessed and ignored when pol_cq() is called,
 991          *  i.e. nr of wqes with flush error status is one less
 992          */
 993         ehca_dbg(&shca->ib_device, "qp_num=%x flusherr_wqe_cnt=%x",
 994                  qp_num, (*bad_wqe_cnt)-1);
 995         wqe->wqef = 0;
 996
 997         return 0;
 998 }
 999
1000 /*
1001  * internal_modify_qp with circumvention to handle aqp0 properly
1002  * smi_reset2init indicates if this is an internal reset-to-init-call for
1003  * smi. This flag must always be zero if called from ehca_modify_qp()!
1004  * This internal func was intorduced to avoid recursion of ehca_modify_qp()!
1005  */
1006 static int internal_modify_qp(struct ib_qp *ibqp,
1007                               struct ib_qp_attr *attr,
1008                               int attr_mask, int smi_reset2init)
1009 {
1010         enum ib_qp_state qp_cur_state, qp_new_state;
1011         int cnt, qp_attr_idx, ret = 0;
1012         enum ib_qp_statetrans statetrans;
1013         struct hcp_modify_qp_control_block *mqpcb;
1014         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1015         struct ehca_shca *shca =
1016                 container_of(ibqp->pd->device, struct ehca_shca, ib_device);
1017         u64 update_mask;
1018         u64 h_ret;
1019         int bad_wqe_cnt = 0;
1020         int squeue_locked = 0;
1021         unsigned long flags = 0;
1022
1023         /* do query_qp to obtain current attr values */
1024         mqpcb = ehca_alloc_fw_ctrlblock(GFP_ATOMIC);
1025         if (!mqpcb) {
1026                 ehca_err(ibqp->device, "Could not get zeroed page for mqpcb "
1027                          "ehca_qp=%p qp_num=%x ", my_qp, ibqp->qp_num);
1028                 return -ENOMEM;
1029         }
1030
1031         h_ret = hipz_h_query_qp(shca->ipz_hca_handle,
1032                                 my_qp->ipz_qp_handle,
1033                                 &my_qp->pf,
1034                                 mqpcb, my_qp->galpas.kernel);
1035         if (h_ret != H_SUCCESS) {
1036                 ehca_err(ibqp->device, "hipz_h_query_qp() failed "
1037                          "ehca_qp=%p qp_num=%x h_ret=%li",
1038                          my_qp, ibqp->qp_num, h_ret);
1039                 ret = ehca2ib_return_code(h_ret);
1040                 goto modify_qp_exit1;
1041         }
1042
1043         qp_cur_state = ehca2ib_qp_state(mqpcb->qp_state);
1044
1045         if (qp_cur_state == -EINVAL) {  /* invalid qp state */
1046                 ret = -EINVAL;
1047                 ehca_err(ibqp->device, "Invalid current ehca_qp_state=%x "
1048                          "ehca_qp=%p qp_num=%x",
1049                          mqpcb->qp_state, my_qp, ibqp->qp_num);
1050                 goto modify_qp_exit1;
1051         }
1052         /*
1053          * circumvention to set aqp0 initial state to init
1054          * as expected by IB spec
1055          */
1056         if (smi_reset2init == 0 &&
1057             ibqp->qp_type == IB_QPT_SMI &&
1058             qp_cur_state == IB_QPS_RESET &&
1059             (attr_mask & IB_QP_STATE) &&
1060             attr->qp_state == IB_QPS_INIT) { /* RESET -> INIT */
1061                 struct ib_qp_attr smiqp_attr = {
1062                         .qp_state = IB_QPS_INIT,
1063                         .port_num = my_qp->init_attr.port_num,
1064                         .pkey_index = 0,
1065                         .qkey = 0
1066                 };
1067                 int smiqp_attr_mask = IB_QP_STATE | IB_QP_PORT |
1068                         IB_QP_PKEY_INDEX | IB_QP_QKEY;
1069                 int smirc = internal_modify_qp(
1070                         ibqp, &smiqp_attr, smiqp_attr_mask, 1);
1071                 if (smirc) {
1072                         ehca_err(ibqp->device, "SMI RESET -> INIT failed. "
1073                                  "ehca_modify_qp() rc=%i", smirc);
1074                         ret = H_PARAMETER;
1075                         goto modify_qp_exit1;
1076                 }
1077                 qp_cur_state = IB_QPS_INIT;
1078                 ehca_dbg(ibqp->device, "SMI RESET -> INIT succeeded");
1079         }
1080         /* is transmitted current state  equal to "real" current state */
1081         if ((attr_mask & IB_QP_CUR_STATE) &&
1082             qp_cur_state != attr->cur_qp_state) {
1083                 ret = -EINVAL;
1084                 ehca_err(ibqp->device,
1085                          "Invalid IB_QP_CUR_STATE attr->curr_qp_state=%x <>"
1086                          " actual cur_qp_state=%x. ehca_qp=%p qp_num=%x",
1087                          attr->cur_qp_state, qp_cur_state, my_qp, ibqp->qp_num);
1088                 goto modify_qp_exit1;
1089         }
1090
1091         ehca_dbg(ibqp->device, "ehca_qp=%p qp_num=%x current qp_state=%x "
1092                  "new qp_state=%x attribute_mask=%x",
1093                  my_qp, ibqp->qp_num, qp_cur_state, attr->qp_state, attr_mask);
1094
1095         qp_new_state = attr_mask & IB_QP_STATE ? attr->qp_state : qp_cur_state;
1096         if (!smi_reset2init &&
1097             !ib_modify_qp_is_ok(qp_cur_state, qp_new_state, ibqp->qp_type,
1098                                 attr_mask)) {
1099                 ret = -EINVAL;
1100                 ehca_err(ibqp->device,
1101                          "Invalid qp transition new_state=%x cur_state=%x "
1102                          "ehca_qp=%p qp_num=%x attr_mask=%x", qp_new_state,
1103                          qp_cur_state, my_qp, ibqp->qp_num, attr_mask);
1104                 goto modify_qp_exit1;
1105         }
1106
1107         mqpcb->qp_state = ib2ehca_qp_state(qp_new_state);
1108         if (mqpcb->qp_state)
1109                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_STATE, 1);
1110         else {
1111                 ret = -EINVAL;
1112                 ehca_err(ibqp->device, "Invalid new qp state=%x "
1113                          "ehca_qp=%p qp_num=%x",
1114                          qp_new_state, my_qp, ibqp->qp_num);
1115                 goto modify_qp_exit1;
1116         }
1117
1118         /* retrieve state transition struct to get req and opt attrs */
1119         statetrans = get_modqp_statetrans(qp_cur_state, qp_new_state);
1120         if (statetrans < 0) {
1121                 ret = -EINVAL;
1122                 ehca_err(ibqp->device, "<INVALID STATE CHANGE> qp_cur_state=%x "
1123                          "new_qp_state=%x State_xsition=%x ehca_qp=%p "
1124                          "qp_num=%x", qp_cur_state, qp_new_state,
1125                          statetrans, my_qp, ibqp->qp_num);
1126                 goto modify_qp_exit1;
1127         }
1128
1129         qp_attr_idx = ib2ehcaqptype(ibqp->qp_type);
1130
1131         if (qp_attr_idx < 0) {
1132                 ret = qp_attr_idx;
1133                 ehca_err(ibqp->device,
1134                          "Invalid QP type=%x ehca_qp=%p qp_num=%x",
1135                          ibqp->qp_type, my_qp, ibqp->qp_num);
1136                 goto modify_qp_exit1;
1137         }
1138
1139         ehca_dbg(ibqp->device,
1140                  "ehca_qp=%p qp_num=%x <VALID STATE CHANGE> qp_state_xsit=%x",
1141                  my_qp, ibqp->qp_num, statetrans);
1142
1143         /* eHCA2 rev2 and higher require the SEND_GRH_FLAG to be set
1144          * in non-LL UD QPs.
1145          */
1146         if ((my_qp->qp_type == IB_QPT_UD) &&
1147             (my_qp->ext_type != EQPT_LLQP) &&
1148             (statetrans == IB_QPST_INIT2RTR) &&
1149             (shca->hw_level >= 0x22)) {
1150                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1151                 mqpcb->send_grh_flag = 1;
1152         }
1153
1154         /* sqe -> rts: set purge bit of bad wqe before actual trans */
1155         if ((my_qp->qp_type == IB_QPT_UD ||
1156              my_qp->qp_type == IB_QPT_GSI ||
1157              my_qp->qp_type == IB_QPT_SMI) &&
1158             statetrans == IB_QPST_SQE2RTS) {
1159                 /* mark next free wqe if kernel */
1160                 if (!ibqp->uobject) {
1161                         struct ehca_wqe *wqe;
1162                         /* lock send queue */
1163                         spin_lock_irqsave(&my_qp->spinlock_s, flags);
1164                         squeue_locked = 1;
1165                         /* mark next free wqe */
1166                         wqe = (struct ehca_wqe *)
1167                                 ipz_qeit_get(&my_qp->ipz_squeue);
1168                         wqe->optype = wqe->wqef = 0xff;
1169                         ehca_dbg(ibqp->device, "qp_num=%x next_free_wqe=%p",
1170                                  ibqp->qp_num, wqe);
1171                 }
1172                 ret = prepare_sqe_rts(my_qp, shca, &bad_wqe_cnt);
1173                 if (ret) {
1174                         ehca_err(ibqp->device, "prepare_sqe_rts() failed "
1175                                  "ehca_qp=%p qp_num=%x ret=%i",
1176                                  my_qp, ibqp->qp_num, ret);
1177                         goto modify_qp_exit2;
1178                 }
1179         }
1180
1181         /*
1182          * enable RDMA_Atomic_Control if reset->init und reliable con
1183          * this is necessary since gen2 does not provide that flag,
1184          * but pHyp requires it
1185          */
1186         if (statetrans == IB_QPST_RESET2INIT &&
1187             (ibqp->qp_type == IB_QPT_RC || ibqp->qp_type == IB_QPT_UC)) {
1188                 mqpcb->rdma_atomic_ctrl = 3;
1189                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RDMA_ATOMIC_CTRL, 1);
1190         }
1191         /* circ. pHyp requires #RDMA/Atomic Resp Res for UC INIT -> RTR */
1192         if (statetrans == IB_QPST_INIT2RTR &&
1193             (ibqp->qp_type == IB_QPT_UC) &&
1194             !(attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)) {
1195                 mqpcb->rdma_nr_atomic_resp_res = 1; /* default to 1 */
1196                 update_mask |=
1197                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1198         }
1199
1200         if (attr_mask & IB_QP_PKEY_INDEX) {
1201                 if (attr->pkey_index >= 16) {
1202                         ret = -EINVAL;
1203                         ehca_err(ibqp->device, "Invalid pkey_index=%x. "
1204                                  "ehca_qp=%p qp_num=%x max_pkey_index=f",
1205                                  attr->pkey_index, my_qp, ibqp->qp_num);
1206                         goto modify_qp_exit2;
1207                 }
1208                 mqpcb->prim_p_key_idx = attr->pkey_index;
1209                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_P_KEY_IDX, 1);
1210         }
1211         if (attr_mask & IB_QP_PORT) {
1212                 struct ehca_sport *sport;
1213                 struct ehca_qp *aqp1;
1214                 if (attr->port_num < 1 || attr->port_num > shca->num_ports) {
1215                         ret = -EINVAL;
1216                         ehca_err(ibqp->device, "Invalid port=%x. "
1217                                  "ehca_qp=%p qp_num=%x num_ports=%x",
1218                                  attr->port_num, my_qp, ibqp->qp_num,
1219                                  shca->num_ports);
1220                         goto modify_qp_exit2;
1221                 }
1222                 sport = &shca->sport[attr->port_num - 1];
1223                 if (!sport->ibqp_sqp[IB_QPT_GSI]) {
1224                         /* should not occur */
1225                         ret = -EFAULT;
1226                         ehca_err(ibqp->device, "AQP1 was not created for "
1227                                  "port=%x", attr->port_num);
1228                         goto modify_qp_exit2;
1229                 }
1230                 aqp1 = container_of(sport->ibqp_sqp[IB_QPT_GSI],
1231                                     struct ehca_qp, ib_qp);
1232                 if (ibqp->qp_type != IB_QPT_GSI &&
1233                     ibqp->qp_type != IB_QPT_SMI &&
1234                     aqp1->mod_qp_parm) {
1235                         /*
1236                          * firmware will reject this modify_qp() because
1237                          * port is not activated/initialized fully
1238                          */
1239                         ret = -EFAULT;
1240                         ehca_warn(ibqp->device, "Couldn't modify qp port=%x: "
1241                                   "either port is being activated (try again) "
1242                                   "or cabling issue", attr->port_num);
1243                         goto modify_qp_exit2;
1244                 }
1245                 mqpcb->prim_phys_port = attr->port_num;
1246                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PRIM_PHYS_PORT, 1);
1247         }
1248         if (attr_mask & IB_QP_QKEY) {
1249                 mqpcb->qkey = attr->qkey;
1250                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_QKEY, 1);
1251         }
1252         if (attr_mask & IB_QP_AV) {
1253                 mqpcb->dlid = attr->ah_attr.dlid;
1254                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DLID, 1);
1255                 mqpcb->source_path_bits = attr->ah_attr.src_path_bits;
1256                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS, 1);
1257                 mqpcb->service_level = attr->ah_attr.sl;
1258                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL, 1);
1259
1260                 if (ehca_calc_ipd(shca, mqpcb->prim_phys_port,
1261                                   attr->ah_attr.static_rate,
1262                                   &mqpcb->max_static_rate)) {
1263                         ret = -EINVAL;
1264                         goto modify_qp_exit2;
1265                 }
1266                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE, 1);
1267
1268                 /*
1269                  * Always supply the GRH flag, even if it's zero, to give the
1270                  * hypervisor a clear "yes" or "no" instead of a "perhaps"
1271                  */
1272                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG, 1);
1273
1274                 /*
1275                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
1276                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1277                  */
1278                 if (attr->ah_attr.ah_flags == IB_AH_GRH) {
1279                         mqpcb->send_grh_flag = 1;
1280
1281                         mqpcb->source_gid_idx = attr->ah_attr.grh.sgid_index;
1282                         update_mask |=
1283                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX, 1);
1284
1285                         for (cnt = 0; cnt < 16; cnt++)
1286                                 mqpcb->dest_gid.byte[cnt] =
1287                                         attr->ah_attr.grh.dgid.raw[cnt];
1288
1289                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_GID, 1);
1290                         mqpcb->flow_label = attr->ah_attr.grh.flow_label;
1291                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL, 1);
1292                         mqpcb->hop_limit = attr->ah_attr.grh.hop_limit;
1293                         update_mask |= EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT, 1);
1294                         mqpcb->traffic_class = attr->ah_attr.grh.traffic_class;
1295                         update_mask |=
1296                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS, 1);
1297                 }
1298         }
1299
1300         if (attr_mask & IB_QP_PATH_MTU) {
1301                 /* store ld(MTU) */
1302                 my_qp->mtu_shift = attr->path_mtu + 7;
1303                 mqpcb->path_mtu = attr->path_mtu;
1304                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_PATH_MTU, 1);
1305         }
1306         if (attr_mask & IB_QP_TIMEOUT) {
1307                 mqpcb->timeout = attr->timeout;
1308                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT, 1);
1309         }
1310         if (attr_mask & IB_QP_RETRY_CNT) {
1311                 mqpcb->retry_count = attr->retry_cnt;
1312                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT, 1);
1313         }
1314         if (attr_mask & IB_QP_RNR_RETRY) {
1315                 mqpcb->rnr_retry_count = attr->rnr_retry;
1316                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT, 1);
1317         }
1318         if (attr_mask & IB_QP_RQ_PSN) {
1319                 mqpcb->receive_psn = attr->rq_psn;
1320                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_RECEIVE_PSN, 1);
1321         }
1322         if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) {
1323                 mqpcb->rdma_nr_atomic_resp_res = attr->max_dest_rd_atomic < 3 ?
1324                         attr->max_dest_rd_atomic : 2;
1325                 update_mask |=
1326                         EHCA_BMASK_SET(MQPCB_MASK_RDMA_NR_ATOMIC_RESP_RES, 1);
1327         }
1328         if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) {
1329                 mqpcb->rdma_atomic_outst_dest_qp = attr->max_rd_atomic < 3 ?
1330                         attr->max_rd_atomic : 2;
1331                 update_mask |=
1332                         EHCA_BMASK_SET
1333                         (MQPCB_MASK_RDMA_ATOMIC_OUTST_DEST_QP, 1);
1334         }
1335         if (attr_mask & IB_QP_ALT_PATH) {
1336                 if (attr->alt_port_num < 1
1337                     || attr->alt_port_num > shca->num_ports) {
1338                         ret = -EINVAL;
1339                         ehca_err(ibqp->device, "Invalid alt_port=%x. "
1340                                  "ehca_qp=%p qp_num=%x num_ports=%x",
1341                                  attr->alt_port_num, my_qp, ibqp->qp_num,
1342                                  shca->num_ports);
1343                         goto modify_qp_exit2;
1344                 }
1345                 mqpcb->alt_phys_port = attr->alt_port_num;
1346
1347                 if (attr->alt_pkey_index >= 16) {
1348                         ret = -EINVAL;
1349                         ehca_err(ibqp->device, "Invalid alt_pkey_index=%x. "
1350                                  "ehca_qp=%p qp_num=%x max_pkey_index=f",
1351                                  attr->pkey_index, my_qp, ibqp->qp_num);
1352                         goto modify_qp_exit2;
1353                 }
1354                 mqpcb->alt_p_key_idx = attr->alt_pkey_index;
1355
1356                 mqpcb->timeout_al = attr->alt_timeout;
1357                 mqpcb->dlid_al = attr->alt_ah_attr.dlid;
1358                 mqpcb->source_path_bits_al = attr->alt_ah_attr.src_path_bits;
1359                 mqpcb->service_level_al = attr->alt_ah_attr.sl;
1360
1361                 if (ehca_calc_ipd(shca, mqpcb->alt_phys_port,
1362                                   attr->alt_ah_attr.static_rate,
1363                                   &mqpcb->max_static_rate_al)) {
1364                         ret = -EINVAL;
1365                         goto modify_qp_exit2;
1366                 }
1367
1368                 /* OpenIB doesn't support alternate retry counts - copy them */
1369                 mqpcb->retry_count_al = mqpcb->retry_count;
1370                 mqpcb->rnr_retry_count_al = mqpcb->rnr_retry_count;
1371
1372                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_ALT_PHYS_PORT, 1)
1373                         | EHCA_BMASK_SET(MQPCB_MASK_ALT_P_KEY_IDX, 1)
1374                         | EHCA_BMASK_SET(MQPCB_MASK_TIMEOUT_AL, 1)
1375                         | EHCA_BMASK_SET(MQPCB_MASK_DLID_AL, 1)
1376                         | EHCA_BMASK_SET(MQPCB_MASK_SOURCE_PATH_BITS_AL, 1)
1377                         | EHCA_BMASK_SET(MQPCB_MASK_SERVICE_LEVEL_AL, 1)
1378                         | EHCA_BMASK_SET(MQPCB_MASK_MAX_STATIC_RATE_AL, 1)
1379                         | EHCA_BMASK_SET(MQPCB_MASK_RETRY_COUNT_AL, 1)
1380                         | EHCA_BMASK_SET(MQPCB_MASK_RNR_RETRY_COUNT_AL, 1);
1381
1382                 /*
1383                  * Always supply the GRH flag, even if it's zero, to give the
1384                  * hypervisor a clear "yes" or "no" instead of a "perhaps"
1385                  */
1386                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_GRH_FLAG_AL, 1);
1387
1388                 /*
1389                  * only if GRH is TRUE we might consider SOURCE_GID_IDX
1390                  * and DEST_GID otherwise phype will return H_ATTR_PARM!!!
1391                  */
1392                 if (attr->alt_ah_attr.ah_flags == IB_AH_GRH) {
1393                         mqpcb->send_grh_flag_al = 1;
1394
1395                         for (cnt = 0; cnt < 16; cnt++)
1396                                 mqpcb->dest_gid_al.byte[cnt] =
1397                                         attr->alt_ah_attr.grh.dgid.raw[cnt];
1398                         mqpcb->source_gid_idx_al =
1399                                 attr->alt_ah_attr.grh.sgid_index;
1400                         mqpcb->flow_label_al = attr->alt_ah_attr.grh.flow_label;
1401                         mqpcb->hop_limit_al = attr->alt_ah_attr.grh.hop_limit;
1402                         mqpcb->traffic_class_al =
1403                                 attr->alt_ah_attr.grh.traffic_class;
1404
1405                         update_mask |=
1406                                 EHCA_BMASK_SET(MQPCB_MASK_SOURCE_GID_IDX_AL, 1)
1407                                 | EHCA_BMASK_SET(MQPCB_MASK_DEST_GID_AL, 1)
1408                                 | EHCA_BMASK_SET(MQPCB_MASK_FLOW_LABEL_AL, 1)
1409                                 | EHCA_BMASK_SET(MQPCB_MASK_HOP_LIMIT_AL, 1) |
1410                                 EHCA_BMASK_SET(MQPCB_MASK_TRAFFIC_CLASS_AL, 1);
1411                 }
1412         }
1413
1414         if (attr_mask & IB_QP_MIN_RNR_TIMER) {
1415                 mqpcb->min_rnr_nak_timer_field = attr->min_rnr_timer;
1416                 update_mask |=
1417                         EHCA_BMASK_SET(MQPCB_MASK_MIN_RNR_NAK_TIMER_FIELD, 1);
1418         }
1419
1420         if (attr_mask & IB_QP_SQ_PSN) {
1421                 mqpcb->send_psn = attr->sq_psn;
1422                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_SEND_PSN, 1);
1423         }
1424
1425         if (attr_mask & IB_QP_DEST_QPN) {
1426                 mqpcb->dest_qp_nr = attr->dest_qp_num;
1427                 update_mask |= EHCA_BMASK_SET(MQPCB_MASK_DEST_QP_NR, 1);
1428         }
1429
1430         if (attr_mask & IB_QP_PATH_MIG_STATE) {
1431                 if (attr->path_mig_state != IB_MIG_REARM
1432                     && attr->path_mig_state != IB_MIG_MIGRATED) {
1433                         ret = -EINVAL;
1434                         ehca_err(ibqp->device, "Invalid mig_state=%x",
1435                                  attr->path_mig_state);
1436                         goto modify_qp_exit2;
1437                 }
1438                 mqpcb->path_migration_state = attr->path_mig_state + 1;
1439                 update_mask |=
1440                         EHCA_BMASK_SET(MQPCB_MASK_PATH_MIGRATION_STATE, 1);
1441         }
1442
1443         if (attr_mask & IB_QP_CAP) {
1444                 mqpcb->max_nr_outst_send_wr = attr->cap.max_send_wr+1;
1445                 update_mask |=
1446                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_SEND_WR, 1);
1447                 mqpcb->max_nr_outst_recv_wr = attr->cap.max_recv_wr+1;
1448                 update_mask |=
1449                         EHCA_BMASK_SET(MQPCB_MASK_MAX_NR_OUTST_RECV_WR, 1);
1450                 /* no support for max_send/recv_sge yet */
1451         }
1452
1453         if (ehca_debug_level)
1454                 ehca_dmp(mqpcb, 4*70, "qp_num=%x", ibqp->qp_num);
1455
1456         h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1457                                  my_qp->ipz_qp_handle,
1458                                  &my_qp->pf,
1459                                  update_mask,
1460                                  mqpcb, my_qp->galpas.kernel);
1461
1462         if (h_ret != H_SUCCESS) {
1463                 ret = ehca2ib_return_code(h_ret);
1464                 ehca_err(ibqp->device, "hipz_h_modify_qp() failed h_ret=%li "
1465                          "ehca_qp=%p qp_num=%x", h_ret, my_qp, ibqp->qp_num);
1466                 goto modify_qp_exit2;
1467         }
1468
1469         if ((my_qp->qp_type == IB_QPT_UD ||
1470              my_qp->qp_type == IB_QPT_GSI ||
1471              my_qp->qp_type == IB_QPT_SMI) &&
1472             statetrans == IB_QPST_SQE2RTS) {
1473                 /* doorbell to reprocessing wqes */
1474                 iosync(); /* serialize GAL register access */
1475                 hipz_update_sqa(my_qp, bad_wqe_cnt-1);
1476                 ehca_gen_dbg("doorbell for %x wqes", bad_wqe_cnt);
1477         }
1478
1479         if (statetrans == IB_QPST_RESET2INIT ||
1480             statetrans == IB_QPST_INIT2INIT) {
1481                 mqpcb->qp_enable = 1;
1482                 mqpcb->qp_state = EHCA_QPS_INIT;
1483                 update_mask = 0;
1484                 update_mask = EHCA_BMASK_SET(MQPCB_MASK_QP_ENABLE, 1);
1485
1486                 h_ret = hipz_h_modify_qp(shca->ipz_hca_handle,
1487                                          my_qp->ipz_qp_handle,
1488                                          &my_qp->pf,
1489                                          update_mask,
1490                                          mqpcb,
1491                                          my_qp->galpas.kernel);
1492
1493                 if (h_ret != H_SUCCESS) {
1494                         ret = ehca2ib_return_code(h_ret);
1495                         ehca_err(ibqp->device, "ENABLE in context of "
1496                                  "RESET_2_INIT failed! Maybe you didn't get "
1497                                  "a LID h_ret=%li ehca_qp=%p qp_num=%x",
1498                                  h_ret, my_qp, ibqp->qp_num);
1499                         goto modify_qp_exit2;
1500                 }
1501         }
1502
1503         if (statetrans == IB_QPST_ANY2RESET) {
1504                 ipz_qeit_reset(&my_qp->ipz_rqueue);
1505                 ipz_qeit_reset(&my_qp->ipz_squeue);
1506         }
1507
1508         if (attr_mask & IB_QP_QKEY)
1509                 my_qp->qkey = attr->qkey;
1510
1511 modify_qp_exit2:
1512         if (squeue_locked) { /* this means: sqe -> rts */
1513                 spin_unlock_irqrestore(&my_qp->spinlock_s, flags);
1514                 my_qp->sqerr_purgeflag = 1;
1515         }
1516
1517 modify_qp_exit1:
1518         ehca_free_fw_ctrlblock(mqpcb);
1519
1520         return ret;
1521 }
1522
1523 int ehca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
1524                    struct ib_udata *udata)
1525 {
1526         struct ehca_shca *shca = container_of(ibqp->device, struct ehca_shca,
1527                                               ib_device);
1528         struct ehca_qp *my_qp = container_of(ibqp, struct ehca_qp, ib_qp);
1529         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
1530                                              ib_pd);
1531         u32 cur_pid = current->tgid;
1532
1533         if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
1534             my_pd->ownpid != cur_pid) {
1535                 ehca_err(ibqp->pd->device, "Invalid caller pid=%x ownpid=%x",
1536                          cur_pid, my_pd->ownpid);
1537                 return -EINVAL;
1538         }
1539
1540         /* The if-block below caches qp_attr to be modified for GSI and SMI
1541          * qps during the initialization by ib_mad. When the respective port
1542          * is activated, ie we got an event PORT_ACTIVE, we'll replay the
1543          * cached modify calls sequence, see ehca_recover_sqs() below.
1544          * Why that is required:
1545          * 1) If one port is connected, older code requires that port one
1546          *    to be connected and module option nr_ports=1 to be given by
1547          *    user, which is very inconvenient for end user.
1548          * 2) Firmware accepts modify_qp() only if respective port has become
1549          *    active. Older code had a wait loop of 30sec create_qp()/
1550          *    define_aqp1(), which is not appropriate in practice. This
1551          *    code now removes that wait loop, see define_aqp1(), and always
1552          *    reports all ports to ib_mad resp. users. Only activated ports
1553          *    will then usable for the users.
1554          */
1555         if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) {
1556                 int port = my_qp->init_attr.port_num;
1557                 struct ehca_sport *sport = &shca->sport[port - 1];
1558                 unsigned long flags;
1559                 spin_lock_irqsave(&sport->mod_sqp_lock, flags);
1560                 /* cache qp_attr only during init */
1561                 if (my_qp->mod_qp_parm) {
1562                         struct ehca_mod_qp_parm *p;
1563                         if (my_qp->mod_qp_parm_idx >= EHCA_MOD_QP_PARM_MAX) {
1564                                 ehca_err(&shca->ib_device,
1565                                          "mod_qp_parm overflow state=%x port=%x"
1566                                          " type=%x", attr->qp_state,
1567                                          my_qp->init_attr.port_num,
1568                                          ibqp->qp_type);
1569                                 spin_unlock_irqrestore(&sport->mod_sqp_lock,
1570                                                        flags);
1571                                 return -EINVAL;
1572                         }
1573                         p = &my_qp->mod_qp_parm[my_qp->mod_qp_parm_idx];
1574                         p->mask = attr_mask;
1575                         p->attr = *attr;
1576                         my_qp->mod_qp_parm_idx++;
1577                         ehca_dbg(&shca->ib_device,
1578                                  "Saved qp_attr for state=%x port=%x type=%x",
1579                                  attr->qp_state, my_qp->init_attr.port_num,
1580                                  ibqp->qp_type);
1581                         spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
1582                         return 0;
1583                 }
1584                 spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
1585         }
1586
1587         return internal_modify_qp(ibqp, attr, attr_mask, 0);
1588 }
1589
1590 void ehca_recover_sqp(struct ib_qp *sqp)
1591 {
1592         struct ehca_qp *my_sqp = container_of(sqp, struct ehca_qp, ib_qp);
1593         int port = my_sqp->init_attr.port_num;
1594         struct ib_qp_attr attr;
1595         struct ehca_mod_qp_parm *qp_parm;
1596         int i, qp_parm_idx, ret;
1597         unsigned long flags, wr_cnt;
1598
1599         if (!my_sqp->mod_qp_parm)
1600                 return;
1601         ehca_dbg(sqp->device, "SQP port=%x qp_num=%x", port, sqp->qp_num);
1602
1603         qp_parm = my_sqp->mod_qp_parm;
1604         qp_parm_idx = my_sqp->mod_qp_parm_idx;
1605         for (i = 0; i < qp_parm_idx; i++) {
1606                 attr = qp_parm[i].attr;
1607                 ret = internal_modify_qp(sqp, &attr, qp_parm[i].mask, 0);
1608                 if (ret) {
1609                         ehca_err(sqp->device, "Could not modify SQP port=%x "
1610                                  "qp_num=%x ret=%x", port, sqp->qp_num, ret);
1611                         goto free_qp_parm;
1612                 }
1613                 ehca_dbg(sqp->device, "SQP port=%x qp_num=%x in state=%x",
1614                          port, sqp->qp_num, attr.qp_state);
1615         }
1616
1617         /* re-trigger posted recv wrs */
1618         wr_cnt =  my_sqp->ipz_rqueue.current_q_offset /
1619                 my_sqp->ipz_rqueue.qe_size;
1620         if (wr_cnt) {
1621                 spin_lock_irqsave(&my_sqp->spinlock_r, flags);
1622                 hipz_update_rqa(my_sqp, wr_cnt);
1623                 spin_unlock_irqrestore(&my_sqp->spinlock_r, flags);
1624                 ehca_dbg(sqp->device, "doorbell port=%x qp_num=%x wr_cnt=%lx",
1625                          port, sqp->qp_num, wr_cnt);
1626         }
1627
1628 free_qp_parm:
1629         kfree(qp_parm);
1630         /* this prevents subsequent calls to modify_qp() to cache qp_attr */
1631         my_sqp->mod_qp_parm = NULL;
1632 }
1633
1634 int ehca_query_qp(struct ib_qp *qp,
1635                   struct ib_qp_attr *qp_attr,
1636                   int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr)
1637 {
1638         struct ehca_qp *my_qp = container_of(qp, struct ehca_qp, ib_qp);
1639         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
1640                                              ib_pd);
1641         struct ehca_shca *shca = container_of(qp->device, struct ehca_shca,
1642                                               ib_device);
1643         struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
1644         struct hcp_modify_qp_control_block *qpcb;
1645         u32 cur_pid = current->tgid;
1646         int cnt, ret = 0;
1647         u64 h_ret;
1648
1649         if (my_pd->ib_pd.uobject  && my_pd->ib_pd.uobject->context  &&
1650             my_pd->ownpid != cur_pid) {
1651                 ehca_err(qp->device, "Invalid caller pid=%x ownpid=%x",
1652                          cur_pid, my_pd->ownpid);
1653                 return -EINVAL;
1654         }
1655
1656         if (qp_attr_mask & QP_ATTR_QUERY_NOT_SUPPORTED) {
1657                 ehca_err(qp->device, "Invalid attribute mask "
1658                          "ehca_qp=%p qp_num=%x qp_attr_mask=%x ",
1659                          my_qp, qp->qp_num, qp_attr_mask);
1660                 return -EINVAL;
1661         }
1662
1663         qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1664         if (!qpcb) {
1665                 ehca_err(qp->device, "Out of memory for qpcb "
1666                          "ehca_qp=%p qp_num=%x", my_qp, qp->qp_num);
1667                 return -ENOMEM;
1668         }
1669
1670         h_ret = hipz_h_query_qp(adapter_handle,
1671                                 my_qp->ipz_qp_handle,
1672                                 &my_qp->pf,
1673                                 qpcb, my_qp->galpas.kernel);
1674
1675         if (h_ret != H_SUCCESS) {
1676                 ret = ehca2ib_return_code(h_ret);
1677                 ehca_err(qp->device, "hipz_h_query_qp() failed "
1678                          "ehca_qp=%p qp_num=%x h_ret=%li",
1679                          my_qp, qp->qp_num, h_ret);
1680                 goto query_qp_exit1;
1681         }
1682
1683         qp_attr->cur_qp_state = ehca2ib_qp_state(qpcb->qp_state);
1684         qp_attr->qp_state = qp_attr->cur_qp_state;
1685
1686         if (qp_attr->cur_qp_state == -EINVAL) {
1687                 ret = -EINVAL;
1688                 ehca_err(qp->device, "Got invalid ehca_qp_state=%x "
1689                          "ehca_qp=%p qp_num=%x",
1690                          qpcb->qp_state, my_qp, qp->qp_num);
1691                 goto query_qp_exit1;
1692         }
1693
1694         if (qp_attr->qp_state == IB_QPS_SQD)
1695                 qp_attr->sq_draining = 1;
1696
1697         qp_attr->qkey = qpcb->qkey;
1698         qp_attr->path_mtu = qpcb->path_mtu;
1699         qp_attr->path_mig_state = qpcb->path_migration_state - 1;
1700         qp_attr->rq_psn = qpcb->receive_psn;
1701         qp_attr->sq_psn = qpcb->send_psn;
1702         qp_attr->min_rnr_timer = qpcb->min_rnr_nak_timer_field;
1703         qp_attr->cap.max_send_wr = qpcb->max_nr_outst_send_wr-1;
1704         qp_attr->cap.max_recv_wr = qpcb->max_nr_outst_recv_wr-1;
1705         /* UD_AV CIRCUMVENTION */
1706         if (my_qp->qp_type == IB_QPT_UD) {
1707                 qp_attr->cap.max_send_sge =
1708                         qpcb->actual_nr_sges_in_sq_wqe - 2;
1709                 qp_attr->cap.max_recv_sge =
1710                         qpcb->actual_nr_sges_in_rq_wqe - 2;
1711         } else {
1712                 qp_attr->cap.max_send_sge =
1713                         qpcb->actual_nr_sges_in_sq_wqe;
1714                 qp_attr->cap.max_recv_sge =
1715                         qpcb->actual_nr_sges_in_rq_wqe;
1716         }
1717
1718         qp_attr->cap.max_inline_data = my_qp->sq_max_inline_data_size;
1719         qp_attr->dest_qp_num = qpcb->dest_qp_nr;
1720
1721         qp_attr->pkey_index =
1722                 EHCA_BMASK_GET(MQPCB_PRIM_P_KEY_IDX, qpcb->prim_p_key_idx);
1723
1724         qp_attr->port_num =
1725                 EHCA_BMASK_GET(MQPCB_PRIM_PHYS_PORT, qpcb->prim_phys_port);
1726
1727         qp_attr->timeout = qpcb->timeout;
1728         qp_attr->retry_cnt = qpcb->retry_count;
1729         qp_attr->rnr_retry = qpcb->rnr_retry_count;
1730
1731         qp_attr->alt_pkey_index =
1732                 EHCA_BMASK_GET(MQPCB_PRIM_P_KEY_IDX, qpcb->alt_p_key_idx);
1733
1734         qp_attr->alt_port_num = qpcb->alt_phys_port;
1735         qp_attr->alt_timeout = qpcb->timeout_al;
1736
1737         qp_attr->max_dest_rd_atomic = qpcb->rdma_nr_atomic_resp_res;
1738         qp_attr->max_rd_atomic = qpcb->rdma_atomic_outst_dest_qp;
1739
1740         /* primary av */
1741         qp_attr->ah_attr.sl = qpcb->service_level;
1742
1743         if (qpcb->send_grh_flag) {
1744                 qp_attr->ah_attr.ah_flags = IB_AH_GRH;
1745         }
1746
1747         qp_attr->ah_attr.static_rate = qpcb->max_static_rate;
1748         qp_attr->ah_attr.dlid = qpcb->dlid;
1749         qp_attr->ah_attr.src_path_bits = qpcb->source_path_bits;
1750         qp_attr->ah_attr.port_num = qp_attr->port_num;
1751
1752         /* primary GRH */
1753         qp_attr->ah_attr.grh.traffic_class = qpcb->traffic_class;
1754         qp_attr->ah_attr.grh.hop_limit = qpcb->hop_limit;
1755         qp_attr->ah_attr.grh.sgid_index = qpcb->source_gid_idx;
1756         qp_attr->ah_attr.grh.flow_label = qpcb->flow_label;
1757
1758         for (cnt = 0; cnt < 16; cnt++)
1759                 qp_attr->ah_attr.grh.dgid.raw[cnt] =
1760                         qpcb->dest_gid.byte[cnt];
1761
1762         /* alternate AV */
1763         qp_attr->alt_ah_attr.sl = qpcb->service_level_al;
1764         if (qpcb->send_grh_flag_al) {
1765                 qp_attr->alt_ah_attr.ah_flags = IB_AH_GRH;
1766         }
1767
1768         qp_attr->alt_ah_attr.static_rate = qpcb->max_static_rate_al;
1769         qp_attr->alt_ah_attr.dlid = qpcb->dlid_al;
1770         qp_attr->alt_ah_attr.src_path_bits = qpcb->source_path_bits_al;
1771
1772         /* alternate GRH */
1773         qp_attr->alt_ah_attr.grh.traffic_class = qpcb->traffic_class_al;
1774         qp_attr->alt_ah_attr.grh.hop_limit = qpcb->hop_limit_al;
1775         qp_attr->alt_ah_attr.grh.sgid_index = qpcb->source_gid_idx_al;
1776         qp_attr->alt_ah_attr.grh.flow_label = qpcb->flow_label_al;
1777
1778         for (cnt = 0; cnt < 16; cnt++)
1779                 qp_attr->alt_ah_attr.grh.dgid.raw[cnt] =
1780                         qpcb->dest_gid_al.byte[cnt];
1781
1782         /* return init attributes given in ehca_create_qp */
1783         if (qp_init_attr)
1784                 *qp_init_attr = my_qp->init_attr;
1785
1786         if (ehca_debug_level)
1787                 ehca_dmp(qpcb, 4*70, "qp_num=%x", qp->qp_num);
1788
1789 query_qp_exit1:
1790         ehca_free_fw_ctrlblock(qpcb);
1791
1792         return ret;
1793 }
1794
1795 int ehca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
1796                     enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
1797 {
1798         struct ehca_qp *my_qp =
1799                 container_of(ibsrq, struct ehca_qp, ib_srq);
1800         struct ehca_pd *my_pd =
1801                 container_of(ibsrq->pd, struct ehca_pd, ib_pd);
1802         struct ehca_shca *shca =
1803                 container_of(ibsrq->pd->device, struct ehca_shca, ib_device);
1804         struct hcp_modify_qp_control_block *mqpcb;
1805         u64 update_mask;
1806         u64 h_ret;
1807         int ret = 0;
1808
1809         u32 cur_pid = current->tgid;
1810         if (my_pd->ib_pd.uobject && my_pd->ib_pd.uobject->context &&
1811             my_pd->ownpid != cur_pid) {
1812                 ehca_err(ibsrq->pd->device, "Invalid caller pid=%x ownpid=%x",
1813                          cur_pid, my_pd->ownpid);
1814                 return -EINVAL;
1815         }
1816
1817         mqpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1818         if (!mqpcb) {
1819                 ehca_err(ibsrq->device, "Could not get zeroed page for mqpcb "
1820                          "ehca_qp=%p qp_num=%x ", my_qp, my_qp->real_qp_num);
1821                 return -ENOMEM;
1822         }
1823
1824         update_mask = 0;
1825         if (attr_mask & IB_SRQ_LIMIT) {
1826                 attr_mask &= ~IB_SRQ_LIMIT;
1827                 update_mask |=
1828                         EHCA_BMASK_SET(MQPCB_MASK_CURR_SRQ_LIMIT, 1)
1829                         | EHCA_BMASK_SET(MQPCB_MASK_QP_AFF_ASYN_EV_LOG_REG, 1);
1830                 mqpcb->curr_srq_limit =
1831                         EHCA_BMASK_SET(MQPCB_CURR_SRQ_LIMIT, attr->srq_limit);
1832                 mqpcb->qp_aff_asyn_ev_log_reg =
1833                         EHCA_BMASK_SET(QPX_AAELOG_RESET_SRQ_LIMIT, 1);
1834         }
1835
1836         /* by now, all bits in attr_mask should have been cleared */
1837         if (attr_mask) {
1838                 ehca_err(ibsrq->device, "invalid attribute mask bits set  "
1839                          "attr_mask=%x", attr_mask);
1840                 ret = -EINVAL;
1841                 goto modify_srq_exit0;
1842         }
1843
1844         if (ehca_debug_level)
1845                 ehca_dmp(mqpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
1846
1847         h_ret = hipz_h_modify_qp(shca->ipz_hca_handle, my_qp->ipz_qp_handle,
1848                                  NULL, update_mask, mqpcb,
1849                                  my_qp->galpas.kernel);
1850
1851         if (h_ret != H_SUCCESS) {
1852                 ret = ehca2ib_return_code(h_ret);
1853                 ehca_err(ibsrq->device, "hipz_h_modify_qp() failed h_ret=%li "
1854                          "ehca_qp=%p qp_num=%x",
1855                          h_ret, my_qp, my_qp->real_qp_num);
1856         }
1857
1858 modify_srq_exit0:
1859         ehca_free_fw_ctrlblock(mqpcb);
1860
1861         return ret;
1862 }
1863
1864 int ehca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr)
1865 {
1866         struct ehca_qp *my_qp = container_of(srq, struct ehca_qp, ib_srq);
1867         struct ehca_pd *my_pd = container_of(srq->pd, struct ehca_pd, ib_pd);
1868         struct ehca_shca *shca = container_of(srq->device, struct ehca_shca,
1869                                               ib_device);
1870         struct ipz_adapter_handle adapter_handle = shca->ipz_hca_handle;
1871         struct hcp_modify_qp_control_block *qpcb;
1872         u32 cur_pid = current->tgid;
1873         int ret = 0;
1874         u64 h_ret;
1875
1876         if (my_pd->ib_pd.uobject  && my_pd->ib_pd.uobject->context  &&
1877             my_pd->ownpid != cur_pid) {
1878                 ehca_err(srq->device, "Invalid caller pid=%x ownpid=%x",
1879                          cur_pid, my_pd->ownpid);
1880                 return -EINVAL;
1881         }
1882
1883         qpcb = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
1884         if (!qpcb) {
1885                 ehca_err(srq->device, "Out of memory for qpcb "
1886                          "ehca_qp=%p qp_num=%x", my_qp, my_qp->real_qp_num);
1887                 return -ENOMEM;
1888         }
1889
1890         h_ret = hipz_h_query_qp(adapter_handle, my_qp->ipz_qp_handle,
1891                                 NULL, qpcb, my_qp->galpas.kernel);
1892
1893         if (h_ret != H_SUCCESS) {
1894                 ret = ehca2ib_return_code(h_ret);
1895                 ehca_err(srq->device, "hipz_h_query_qp() failed "
1896                          "ehca_qp=%p qp_num=%x h_ret=%li",
1897                          my_qp, my_qp->real_qp_num, h_ret);
1898                 goto query_srq_exit1;
1899         }
1900
1901         srq_attr->max_wr = qpcb->max_nr_outst_recv_wr - 1;
1902         srq_attr->max_sge = 3;
1903         srq_attr->srq_limit = EHCA_BMASK_GET(
1904                 MQPCB_CURR_SRQ_LIMIT, qpcb->curr_srq_limit);
1905
1906         if (ehca_debug_level)
1907                 ehca_dmp(qpcb, 4*70, "qp_num=%x", my_qp->real_qp_num);
1908
1909 query_srq_exit1:
1910         ehca_free_fw_ctrlblock(qpcb);
1911
1912         return ret;
1913 }
1914
1915 static int internal_destroy_qp(struct ib_device *dev, struct ehca_qp *my_qp,
1916                                struct ib_uobject *uobject)
1917 {
1918         struct ehca_shca *shca = container_of(dev, struct ehca_shca, ib_device);
1919         struct ehca_pd *my_pd = container_of(my_qp->ib_qp.pd, struct ehca_pd,
1920                                              ib_pd);
1921         struct ehca_sport *sport = &shca->sport[my_qp->init_attr.port_num - 1];
1922         u32 cur_pid = current->tgid;
1923         u32 qp_num = my_qp->real_qp_num;
1924         int ret;
1925         u64 h_ret;
1926         u8 port_num;
1927         enum ib_qp_type qp_type;
1928         unsigned long flags;
1929
1930         if (uobject) {
1931                 if (my_qp->mm_count_galpa ||
1932                     my_qp->mm_count_rqueue || my_qp->mm_count_squeue) {
1933                         ehca_err(dev, "Resources still referenced in "
1934                                  "user space qp_num=%x", qp_num);
1935                         return -EINVAL;
1936                 }
1937                 if (my_pd->ownpid != cur_pid) {
1938                         ehca_err(dev, "Invalid caller pid=%x ownpid=%x",
1939                                  cur_pid, my_pd->ownpid);
1940                         return -EINVAL;
1941                 }
1942         }
1943
1944         if (my_qp->send_cq) {
1945                 ret = ehca_cq_unassign_qp(my_qp->send_cq, qp_num);
1946                 if (ret) {
1947                         ehca_err(dev, "Couldn't unassign qp from "
1948                                  "send_cq ret=%i qp_num=%x cq_num=%x", ret,
1949                                  qp_num, my_qp->send_cq->cq_number);
1950                         return ret;
1951                 }
1952         }
1953
1954         write_lock_irqsave(&ehca_qp_idr_lock, flags);
1955         idr_remove(&ehca_qp_idr, my_qp->token);
1956         write_unlock_irqrestore(&ehca_qp_idr_lock, flags);
1957
1958         h_ret = hipz_h_destroy_qp(shca->ipz_hca_handle, my_qp);
1959         if (h_ret != H_SUCCESS) {
1960                 ehca_err(dev, "hipz_h_destroy_qp() failed h_ret=%li "
1961                          "ehca_qp=%p qp_num=%x", h_ret, my_qp, qp_num);
1962                 return ehca2ib_return_code(h_ret);
1963         }
1964
1965         port_num = my_qp->init_attr.port_num;
1966         qp_type  = my_qp->init_attr.qp_type;
1967
1968         if (qp_type == IB_QPT_SMI || qp_type == IB_QPT_GSI) {
1969                 spin_lock_irqsave(&sport->mod_sqp_lock, flags);
1970                 kfree(my_qp->mod_qp_parm);
1971                 my_qp->mod_qp_parm = NULL;
1972                 shca->sport[port_num - 1].ibqp_sqp[qp_type] = NULL;
1973                 spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
1974         }
1975
1976         /* no support for IB_QPT_SMI yet */
1977         if (qp_type == IB_QPT_GSI) {
1978                 struct ib_event event;
1979                 ehca_info(dev, "device %s: port %x is inactive.",
1980                           shca->ib_device.name, port_num);
1981                 event.device = &shca->ib_device;
1982                 event.event = IB_EVENT_PORT_ERR;
1983                 event.element.port_num = port_num;
1984                 shca->sport[port_num - 1].port_state = IB_PORT_DOWN;
1985                 ib_dispatch_event(&event);
1986         }
1987
1988         if (HAS_RQ(my_qp))
1989                 ipz_queue_dtor(my_pd, &my_qp->ipz_rqueue);
1990         if (HAS_SQ(my_qp))
1991                 ipz_queue_dtor(my_pd, &my_qp->ipz_squeue);
1992         kmem_cache_free(qp_cache, my_qp);
1993         return 0;
1994 }
1995
1996 int ehca_destroy_qp(struct ib_qp *qp)
1997 {
1998         return internal_destroy_qp(qp->device,
1999                                    container_of(qp, struct ehca_qp, ib_qp),
2000                                    qp->uobject);
2001 }
2002
2003 int ehca_destroy_srq(struct ib_srq *srq)
2004 {
2005         return internal_destroy_qp(srq->device,
2006                                    container_of(srq, struct ehca_qp, ib_srq),
2007                                    srq->uobject);
2008 }
2009
2010 int ehca_init_qp_cache(void)
2011 {
2012         qp_cache = kmem_cache_create("ehca_cache_qp",
2013                                      sizeof(struct ehca_qp), 0,
2014                                      SLAB_HWCACHE_ALIGN,
2015                                      NULL);
2016         if (!qp_cache)
2017                 return -ENOMEM;
2018         return 0;
2019 }
2020
2021 void ehca_cleanup_qp_cache(void)
2022 {
2023         if (qp_cache)
2024                 kmem_cache_destroy(qp_cache);
2025 }