drivers/infiniband/hw/mthca/mthca_provider.c

   1 /*
   2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   4  * Copyright (c) 2005 Cisco Systems. All rights reserved.
   5  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   6  * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
   7  *
   8  * This software is available to you under a choice of one of two
   9  * licenses.  You may choose to be licensed under the terms of the GNU
  10  * General Public License (GPL) Version 2, available from the file
  11  * COPYING in the main directory of this source tree, or the
  12  * OpenIB.org BSD license below:
  13  *
  14  *     Redistribution and use in source and binary forms, with or
  15  *     without modification, are permitted provided that the following
  16  *     conditions are met:
  17  *
  18  *      - Redistributions of source code must retain the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer.
  21  *
  22  *      - Redistributions in binary form must reproduce the above
  23  *        copyright notice, this list of conditions and the following
  24  *        disclaimer in the documentation and/or other materials
  25  *        provided with the distribution.
  26  *
  27  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  31  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  32  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  33  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  34  * SOFTWARE.
  35  *
  36  * $Id: mthca_provider.c 4859 2006-01-09 21:55:10Z roland $
  37  */
  38
  39 #include <rdma/ib_smi.h>
  40 #include <rdma/ib_user_verbs.h>
  41 #include <linux/mm.h>
  42
  43 #include "mthca_dev.h"
  44 #include "mthca_cmd.h"
  45 #include "mthca_user.h"
  46 #include "mthca_memfree.h"
  47
  48 static void init_query_mad(struct ib_smp *mad)
  49 {
  50         mad->base_version  = 1;
  51         mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
  52         mad->class_version = 1;
  53         mad->method        = IB_MGMT_METHOD_GET;
  54 }
  55
  56 static int mthca_query_device(struct ib_device *ibdev,
  57                               struct ib_device_attr *props)
  58 {
  59         struct ib_smp *in_mad  = NULL;
  60         struct ib_smp *out_mad = NULL;
  61         int err = -ENOMEM;
  62         struct mthca_dev* mdev = to_mdev(ibdev);
  63
  64         u8 status;
  65
  66         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
  67         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
  68         if (!in_mad || !out_mad)
  69                 goto out;
  70
  71         memset(props, 0, sizeof *props);
  72
  73         props->fw_ver              = mdev->fw_ver;
  74
  75         init_query_mad(in_mad);
  76         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
  77
  78         err = mthca_MAD_IFC(mdev, 1, 1,
  79                             1, NULL, NULL, in_mad, out_mad,
  80                             &status);
  81         if (err)
  82                 goto out;
  83         if (status) {
  84                 err = -EINVAL;
  85                 goto out;
  86         }
  87
  88         props->device_cap_flags    = mdev->device_cap_flags;
  89         props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
  90                 0xffffff;
  91         props->vendor_part_id      = be16_to_cpup((__be16 *) (out_mad->data + 30));
  92         props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
  93         memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
  94
  95         props->max_mr_size         = ~0ull;
  96         props->page_size_cap       = mdev->limits.page_size_cap;
  97         props->max_qp              = mdev->limits.num_qps - mdev->limits.reserved_qps;
  98         props->max_qp_wr           = mdev->limits.max_wqes;
  99         props->max_sge             = mdev->limits.max_sg;
 100         props->max_cq              = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
 101         props->max_cqe             = mdev->limits.max_cqes;
 102         props->max_mr              = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
 103         props->max_pd              = mdev->limits.num_pds - mdev->limits.reserved_pds;
 104         props->max_qp_rd_atom      = 1 << mdev->qp_table.rdb_shift;
 105         props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma;
 106         props->max_res_rd_atom     = props->max_qp_rd_atom * props->max_qp;
 107         props->max_srq             = mdev->limits.num_srqs - mdev->limits.reserved_srqs;
 108         props->max_srq_wr          = mdev->limits.max_srq_wqes;
 109         props->max_srq_sge         = mdev->limits.max_sg;
 110         props->local_ca_ack_delay  = mdev->limits.local_ca_ack_delay;
 111         props->atomic_cap          = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
 112                                         IB_ATOMIC_HCA : IB_ATOMIC_NONE;
 113         props->max_pkeys           = mdev->limits.pkey_table_len;
 114         props->max_mcast_grp       = mdev->limits.num_mgms + mdev->limits.num_amgms;
 115         props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
 116         props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 117                                            props->max_mcast_grp;
 118
 119         err = 0;
 120  out:
 121         kfree(in_mad);
 122         kfree(out_mad);
 123         return err;
 124 }
 125
 126 static int mthca_query_port(struct ib_device *ibdev,
 127                             u8 port, struct ib_port_attr *props)
 128 {
 129         struct ib_smp *in_mad  = NULL;
 130         struct ib_smp *out_mad = NULL;
 131         int err = -ENOMEM;
 132         u8 status;
 133
 134         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 135         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 136         if (!in_mad || !out_mad)
 137                 goto out;
 138
 139         memset(props, 0, sizeof *props);
 140
 141         init_query_mad(in_mad);
 142         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 143         in_mad->attr_mod = cpu_to_be32(port);
 144
 145         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 146                             port, NULL, NULL, in_mad, out_mad,
 147                             &status);
 148         if (err)
 149                 goto out;
 150         if (status) {
 151                 err = -EINVAL;
 152                 goto out;
 153         }
 154
 155         props->lid               = be16_to_cpup((__be16 *) (out_mad->data + 16));
 156         props->lmc               = out_mad->data[34] & 0x7;
 157         props->sm_lid            = be16_to_cpup((__be16 *) (out_mad->data + 18));
 158         props->sm_sl             = out_mad->data[36] & 0xf;
 159         props->state             = out_mad->data[32] & 0xf;
 160         props->phys_state        = out_mad->data[33] >> 4;
 161         props->port_cap_flags    = be32_to_cpup((__be32 *) (out_mad->data + 20));
 162         props->gid_tbl_len       = to_mdev(ibdev)->limits.gid_table_len;
 163         props->max_msg_sz        = 0x80000000;
 164         props->pkey_tbl_len      = to_mdev(ibdev)->limits.pkey_table_len;
 165         props->bad_pkey_cntr     = be16_to_cpup((__be16 *) (out_mad->data + 46));
 166         props->qkey_viol_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 48));
 167         props->active_width      = out_mad->data[31] & 0xf;
 168         props->active_speed      = out_mad->data[35] >> 4;
 169         props->max_mtu           = out_mad->data[41] & 0xf;
 170         props->active_mtu        = out_mad->data[36] >> 4;
 171         props->subnet_timeout    = out_mad->data[51] & 0x1f;
 172
 173  out:
 174         kfree(in_mad);
 175         kfree(out_mad);
 176         return err;
 177 }
 178
 179 static int mthca_modify_port(struct ib_device *ibdev,
 180                              u8 port, int port_modify_mask,
 181                              struct ib_port_modify *props)
 182 {
 183         struct mthca_set_ib_param set_ib;
 184         struct ib_port_attr attr;
 185         int err;
 186         u8 status;
 187
 188         if (down_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 189                 return -ERESTARTSYS;
 190
 191         err = mthca_query_port(ibdev, port, &attr);
 192         if (err)
 193                 goto out;
 194
 195         set_ib.set_si_guid     = 0;
 196         set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
 197
 198         set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
 199                 ~props->clr_port_cap_mask;
 200
 201         err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port, &status);
 202         if (err)
 203                 goto out;
 204         if (status) {
 205                 err = -EINVAL;
 206                 goto out;
 207         }
 208
 209 out:
 210         up(&to_mdev(ibdev)->cap_mask_mutex);
 211         return err;
 212 }
 213
 214 static int mthca_query_pkey(struct ib_device *ibdev,
 215                             u8 port, u16 index, u16 *pkey)
 216 {
 217         struct ib_smp *in_mad  = NULL;
 218         struct ib_smp *out_mad = NULL;
 219         int err = -ENOMEM;
 220         u8 status;
 221
 222         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 223         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 224         if (!in_mad || !out_mad)
 225                 goto out;
 226
 227         init_query_mad(in_mad);
 228         in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
 229         in_mad->attr_mod = cpu_to_be32(index / 32);
 230
 231         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 232                             port, NULL, NULL, in_mad, out_mad,
 233                             &status);
 234         if (err)
 235                 goto out;
 236         if (status) {
 237                 err = -EINVAL;
 238                 goto out;
 239         }
 240
 241         *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
 242
 243  out:
 244         kfree(in_mad);
 245         kfree(out_mad);
 246         return err;
 247 }
 248
 249 static int mthca_query_gid(struct ib_device *ibdev, u8 port,
 250                            int index, union ib_gid *gid)
 251 {
 252         struct ib_smp *in_mad  = NULL;
 253         struct ib_smp *out_mad = NULL;
 254         int err = -ENOMEM;
 255         u8 status;
 256
 257         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 258         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 259         if (!in_mad || !out_mad)
 260                 goto out;
 261
 262         init_query_mad(in_mad);
 263         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 264         in_mad->attr_mod = cpu_to_be32(port);
 265
 266         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 267                             port, NULL, NULL, in_mad, out_mad,
 268                             &status);
 269         if (err)
 270                 goto out;
 271         if (status) {
 272                 err = -EINVAL;
 273                 goto out;
 274         }
 275
 276         memcpy(gid->raw, out_mad->data + 8, 8);
 277
 278         init_query_mad(in_mad);
 279         in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
 280         in_mad->attr_mod = cpu_to_be32(index / 8);
 281
 282         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 283                             port, NULL, NULL, in_mad, out_mad,
 284                             &status);
 285         if (err)
 286                 goto out;
 287         if (status) {
 288                 err = -EINVAL;
 289                 goto out;
 290         }
 291
 292         memcpy(gid->raw + 8, out_mad->data + (index % 8) * 16, 8);
 293
 294  out:
 295         kfree(in_mad);
 296         kfree(out_mad);
 297         return err;
 298 }
 299
 300 static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
 301                                                 struct ib_udata *udata)
 302 {
 303         struct mthca_alloc_ucontext_resp uresp;
 304         struct mthca_ucontext           *context;
 305         int                              err;
 306
 307         memset(&uresp, 0, sizeof uresp);
 308
 309         uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
 310         if (mthca_is_memfree(to_mdev(ibdev)))
 311                 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
 312         else
 313                 uresp.uarc_size = 0;
 314
 315         context = kmalloc(sizeof *context, GFP_KERNEL);
 316         if (!context)
 317                 return ERR_PTR(-ENOMEM);
 318
 319         err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
 320         if (err) {
 321                 kfree(context);
 322                 return ERR_PTR(err);
 323         }
 324
 325         context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
 326         if (IS_ERR(context->db_tab)) {
 327                 err = PTR_ERR(context->db_tab);
 328                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 329                 kfree(context);
 330                 return ERR_PTR(err);
 331         }
 332
 333         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 334                 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
 335                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 336                 kfree(context);
 337                 return ERR_PTR(-EFAULT);
 338         }
 339
 340         return &context->ibucontext;
 341 }
 342
 343 static int mthca_dealloc_ucontext(struct ib_ucontext *context)
 344 {
 345         mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
 346                                   to_mucontext(context)->db_tab);
 347         mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
 348         kfree(to_mucontext(context));
 349
 350         return 0;
 351 }
 352
 353 static int mthca_mmap_uar(struct ib_ucontext *context,
 354                           struct vm_area_struct *vma)
 355 {
 356         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
 357                 return -EINVAL;
 358
 359         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 360
 361         if (io_remap_pfn_range(vma, vma->vm_start,
 362                                to_mucontext(context)->uar.pfn,
 363                                PAGE_SIZE, vma->vm_page_prot))
 364                 return -EAGAIN;
 365
 366         return 0;
 367 }
 368
 369 static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
 370                                     struct ib_ucontext *context,
 371                                     struct ib_udata *udata)
 372 {
 373         struct mthca_pd *pd;
 374         int err;
 375
 376         pd = kmalloc(sizeof *pd, GFP_KERNEL);
 377         if (!pd)
 378                 return ERR_PTR(-ENOMEM);
 379
 380         err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
 381         if (err) {
 382                 kfree(pd);
 383                 return ERR_PTR(err);
 384         }
 385
 386         if (context) {
 387                 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
 388                         mthca_pd_free(to_mdev(ibdev), pd);
 389                         kfree(pd);
 390                         return ERR_PTR(-EFAULT);
 391                 }
 392         }
 393
 394         return &pd->ibpd;
 395 }
 396
 397 static int mthca_dealloc_pd(struct ib_pd *pd)
 398 {
 399         mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
 400         kfree(pd);
 401
 402         return 0;
 403 }
 404
 405 static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
 406                                      struct ib_ah_attr *ah_attr)
 407 {
 408         int err;
 409         struct mthca_ah *ah;
 410
 411         ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 412         if (!ah)
 413                 return ERR_PTR(-ENOMEM);
 414
 415         err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
 416         if (err) {
 417                 kfree(ah);
 418                 return ERR_PTR(err);
 419         }
 420
 421         return &ah->ibah;
 422 }
 423
 424 static int mthca_ah_destroy(struct ib_ah *ah)
 425 {
 426         mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
 427         kfree(ah);
 428
 429         return 0;
 430 }
 431
 432 static struct ib_srq *mthca_create_srq(struct ib_pd *pd,
 433                                        struct ib_srq_init_attr *init_attr,
 434                                        struct ib_udata *udata)
 435 {
 436         struct mthca_create_srq ucmd;
 437         struct mthca_ucontext *context = NULL;
 438         struct mthca_srq *srq;
 439         int err;
 440
 441         srq = kmalloc(sizeof *srq, GFP_KERNEL);
 442         if (!srq)
 443                 return ERR_PTR(-ENOMEM);
 444
 445         if (pd->uobject) {
 446                 context = to_mucontext(pd->uobject->context);
 447
 448                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 449                         err = -EFAULT;
 450                         goto err_free;
 451                 }
 452
 453                 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 454                                         context->db_tab, ucmd.db_index,
 455                                         ucmd.db_page);
 456
 457                 if (err)
 458                         goto err_free;
 459
 460                 srq->mr.ibmr.lkey = ucmd.lkey;
 461                 srq->db_index     = ucmd.db_index;
 462         }
 463
 464         err = mthca_alloc_srq(to_mdev(pd->device), to_mpd(pd),
 465                               &init_attr->attr, srq);
 466
 467         if (err && pd->uobject)
 468                 mthca_unmap_user_db(to_mdev(pd->device), &context->uar,
 469                                     context->db_tab, ucmd.db_index);
 470
 471         if (err)
 472                 goto err_free;
 473
 474         if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof (__u32))) {
 475                 mthca_free_srq(to_mdev(pd->device), srq);
 476                 err = -EFAULT;
 477                 goto err_free;
 478         }
 479
 480         return &srq->ibsrq;
 481
 482 err_free:
 483         kfree(srq);
 484
 485         return ERR_PTR(err);
 486 }
 487
 488 static int mthca_destroy_srq(struct ib_srq *srq)
 489 {
 490         struct mthca_ucontext *context;
 491
 492         if (srq->uobject) {
 493                 context = to_mucontext(srq->uobject->context);
 494
 495                 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
 496                                     context->db_tab, to_msrq(srq)->db_index);
 497         }
 498
 499         mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
 500         kfree(srq);
 501
 502         return 0;
 503 }
 504
 505 static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
 506                                      struct ib_qp_init_attr *init_attr,
 507                                      struct ib_udata *udata)
 508 {
 509         struct mthca_create_qp ucmd;
 510         struct mthca_qp *qp;
 511         int err;
 512
 513         switch (init_attr->qp_type) {
 514         case IB_QPT_RC:
 515         case IB_QPT_UC:
 516         case IB_QPT_UD:
 517         {
 518                 struct mthca_ucontext *context;
 519
 520                 qp = kmalloc(sizeof *qp, GFP_KERNEL);
 521                 if (!qp)
 522                         return ERR_PTR(-ENOMEM);
 523
 524                 if (pd->uobject) {
 525                         context = to_mucontext(pd->uobject->context);
 526
 527                         if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 528                                 kfree(qp);
 529                                 return ERR_PTR(-EFAULT);
 530                         }
 531
 532                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 533                                                 context->db_tab,
 534                                                 ucmd.sq_db_index, ucmd.sq_db_page);
 535                         if (err) {
 536                                 kfree(qp);
 537                                 return ERR_PTR(err);
 538                         }
 539
 540                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 541                                                 context->db_tab,
 542                                                 ucmd.rq_db_index, ucmd.rq_db_page);
 543                         if (err) {
 544                                 mthca_unmap_user_db(to_mdev(pd->device),
 545                                                     &context->uar,
 546                                                     context->db_tab,
 547                                                     ucmd.sq_db_index);
 548                                 kfree(qp);
 549                                 return ERR_PTR(err);
 550                         }
 551
 552                         qp->mr.ibmr.lkey = ucmd.lkey;
 553                         qp->sq.db_index  = ucmd.sq_db_index;
 554                         qp->rq.db_index  = ucmd.rq_db_index;
 555                 }
 556
 557                 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
 558                                      to_mcq(init_attr->send_cq),
 559                                      to_mcq(init_attr->recv_cq),
 560                                      init_attr->qp_type, init_attr->sq_sig_type,
 561                                      &init_attr->cap, qp);
 562
 563                 if (err && pd->uobject) {
 564                         context = to_mucontext(pd->uobject->context);
 565
 566                         mthca_unmap_user_db(to_mdev(pd->device),
 567                                             &context->uar,
 568                                             context->db_tab,
 569                                             ucmd.sq_db_index);
 570                         mthca_unmap_user_db(to_mdev(pd->device),
 571                                             &context->uar,
 572                                             context->db_tab,
 573                                             ucmd.rq_db_index);
 574                 }
 575
 576                 qp->ibqp.qp_num = qp->qpn;
 577                 break;
 578         }
 579         case IB_QPT_SMI:
 580         case IB_QPT_GSI:
 581         {
 582                 /* Don't allow userspace to create special QPs */
 583                 if (pd->uobject)
 584                         return ERR_PTR(-EINVAL);
 585
 586                 qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
 587                 if (!qp)
 588                         return ERR_PTR(-ENOMEM);
 589
 590                 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
 591
 592                 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
 593                                       to_mcq(init_attr->send_cq),
 594                                       to_mcq(init_attr->recv_cq),
 595                                       init_attr->sq_sig_type, &init_attr->cap,
 596                                       qp->ibqp.qp_num, init_attr->port_num,
 597                                       to_msqp(qp));
 598                 break;
 599         }
 600         default:
 601                 /* Don't support raw QPs */
 602                 return ERR_PTR(-ENOSYS);
 603         }
 604
 605         if (err) {
 606                 kfree(qp);
 607                 return ERR_PTR(err);
 608         }
 609
 610         init_attr->cap.max_send_wr     = qp->sq.max;
 611         init_attr->cap.max_recv_wr     = qp->rq.max;
 612         init_attr->cap.max_send_sge    = qp->sq.max_gs;
 613         init_attr->cap.max_recv_sge    = qp->rq.max_gs;
 614         init_attr->cap.max_inline_data = qp->max_inline_data;
 615
 616         return &qp->ibqp;
 617 }
 618
 619 static int mthca_destroy_qp(struct ib_qp *qp)
 620 {
 621         if (qp->uobject) {
 622                 mthca_unmap_user_db(to_mdev(qp->device),
 623                                     &to_mucontext(qp->uobject->context)->uar,
 624                                     to_mucontext(qp->uobject->context)->db_tab,
 625                                     to_mqp(qp)->sq.db_index);
 626                 mthca_unmap_user_db(to_mdev(qp->device),
 627                                     &to_mucontext(qp->uobject->context)->uar,
 628                                     to_mucontext(qp->uobject->context)->db_tab,
 629                                     to_mqp(qp)->rq.db_index);
 630         }
 631         mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
 632         kfree(qp);
 633         return 0;
 634 }
 635
 636 static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
 637                                      struct ib_ucontext *context,
 638                                      struct ib_udata *udata)
 639 {
 640         struct mthca_create_cq ucmd;
 641         struct mthca_cq *cq;
 642         int nent;
 643         int err;
 644
 645         if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
 646                 return ERR_PTR(-EINVAL);
 647
 648         if (context) {
 649                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 650                         return ERR_PTR(-EFAULT);
 651
 652                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 653                                         to_mucontext(context)->db_tab,
 654                                         ucmd.set_db_index, ucmd.set_db_page);
 655                 if (err)
 656                         return ERR_PTR(err);
 657
 658                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 659                                         to_mucontext(context)->db_tab,
 660                                         ucmd.arm_db_index, ucmd.arm_db_page);
 661                 if (err)
 662                         goto err_unmap_set;
 663         }
 664
 665         cq = kmalloc(sizeof *cq, GFP_KERNEL);
 666         if (!cq) {
 667                 err = -ENOMEM;
 668                 goto err_unmap_arm;
 669         }
 670
 671         if (context) {
 672                 cq->mr.ibmr.lkey    = ucmd.lkey;
 673                 cq->set_ci_db_index = ucmd.set_db_index;
 674                 cq->arm_db_index    = ucmd.arm_db_index;
 675         }
 676
 677         for (nent = 1; nent <= entries; nent <<= 1)
 678                 ; /* nothing */
 679
 680         err = mthca_init_cq(to_mdev(ibdev), nent,
 681                             context ? to_mucontext(context) : NULL,
 682                             context ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
 683                             cq);
 684         if (err)
 685                 goto err_free;
 686
 687         if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
 688                 mthca_free_cq(to_mdev(ibdev), cq);
 689                 goto err_free;
 690         }
 691
 692         return &cq->ibcq;
 693
 694 err_free:
 695         kfree(cq);
 696
 697 err_unmap_arm:
 698         if (context)
 699                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 700                                     to_mucontext(context)->db_tab, ucmd.arm_db_index);
 701
 702 err_unmap_set:
 703         if (context)
 704                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 705                                     to_mucontext(context)->db_tab, ucmd.set_db_index);
 706
 707         return ERR_PTR(err);
 708 }
 709
 710 static int mthca_destroy_cq(struct ib_cq *cq)
 711 {
 712         if (cq->uobject) {
 713                 mthca_unmap_user_db(to_mdev(cq->device),
 714                                     &to_mucontext(cq->uobject->context)->uar,
 715                                     to_mucontext(cq->uobject->context)->db_tab,
 716                                     to_mcq(cq)->arm_db_index);
 717                 mthca_unmap_user_db(to_mdev(cq->device),
 718                                     &to_mucontext(cq->uobject->context)->uar,
 719                                     to_mucontext(cq->uobject->context)->db_tab,
 720                                     to_mcq(cq)->set_ci_db_index);
 721         }
 722         mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
 723         kfree(cq);
 724
 725         return 0;
 726 }
 727
 728 static inline u32 convert_access(int acc)
 729 {
 730         return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC       : 0) |
 731                (acc & IB_ACCESS_REMOTE_WRITE  ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
 732                (acc & IB_ACCESS_REMOTE_READ   ? MTHCA_MPT_FLAG_REMOTE_READ  : 0) |
 733                (acc & IB_ACCESS_LOCAL_WRITE   ? MTHCA_MPT_FLAG_LOCAL_WRITE  : 0) |
 734                MTHCA_MPT_FLAG_LOCAL_READ;
 735 }
 736
 737 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
 738 {
 739         struct mthca_mr *mr;
 740         int err;
 741
 742         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 743         if (!mr)
 744                 return ERR_PTR(-ENOMEM);
 745
 746         err = mthca_mr_alloc_notrans(to_mdev(pd->device),
 747                                      to_mpd(pd)->pd_num,
 748                                      convert_access(acc), mr);
 749
 750         if (err) {
 751                 kfree(mr);
 752                 return ERR_PTR(err);
 753         }
 754
 755         return &mr->ibmr;
 756 }
 757
 758 static struct ib_mr *mthca_reg_phys_mr(struct ib_pd       *pd,
 759                                        struct ib_phys_buf *buffer_list,
 760                                        int                 num_phys_buf,
 761                                        int                 acc,
 762                                        u64                *iova_start)
 763 {
 764         struct mthca_mr *mr;
 765         u64 *page_list;
 766         u64 total_size;
 767         u64 mask;
 768         int shift;
 769         int npages;
 770         int err;
 771         int i, j, n;
 772
 773         /* First check that we have enough alignment */
 774         if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK))
 775                 return ERR_PTR(-EINVAL);
 776
 777         mask = 0;
 778         total_size = 0;
 779         for (i = 0; i < num_phys_buf; ++i) {
 780                 if (i != 0)
 781                         mask |= buffer_list[i].addr;
 782                 if (i != num_phys_buf - 1)
 783                         mask |= buffer_list[i].addr + buffer_list[i].size;
 784
 785                 total_size += buffer_list[i].size;
 786         }
 787
 788         if (mask & ~PAGE_MASK)
 789                 return ERR_PTR(-EINVAL);
 790
 791         /* Find largest page shift we can use to cover buffers */
 792         for (shift = PAGE_SHIFT; shift < 31; ++shift)
 793                 if (num_phys_buf > 1) {
 794                         if ((1ULL << shift) & mask)
 795                                 break;
 796                 } else {
 797                         if (1ULL << shift >=
 798                             buffer_list[0].size +
 799                             (buffer_list[0].addr & ((1ULL << shift) - 1)))
 800                                 break;
 801                 }
 802
 803         buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
 804         buffer_list[0].addr &= ~0ull << shift;
 805
 806         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 807         if (!mr)
 808                 return ERR_PTR(-ENOMEM);
 809
 810         npages = 0;
 811         for (i = 0; i < num_phys_buf; ++i)
 812                 npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 813
 814         if (!npages)
 815                 return &mr->ibmr;
 816
 817         page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
 818         if (!page_list) {
 819                 kfree(mr);
 820                 return ERR_PTR(-ENOMEM);
 821         }
 822
 823         n = 0;
 824         for (i = 0; i < num_phys_buf; ++i)
 825                 for (j = 0;
 826                      j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 827                      ++j)
 828                         page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
 829
 830         mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
 831                   "in PD %x; shift %d, npages %d.\n",
 832                   (unsigned long long) buffer_list[0].addr,
 833                   (unsigned long long) *iova_start,
 834                   to_mpd(pd)->pd_num,
 835                   shift, npages);
 836
 837         err = mthca_mr_alloc_phys(to_mdev(pd->device),
 838                                   to_mpd(pd)->pd_num,
 839                                   page_list, shift, npages,
 840                                   *iova_start, total_size,
 841                                   convert_access(acc), mr);
 842
 843         if (err) {
 844                 kfree(page_list);
 845                 kfree(mr);
 846                 return ERR_PTR(err);
 847         }
 848
 849         kfree(page_list);
 850         return &mr->ibmr;
 851 }
 852
 853 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 854                                        int acc, struct ib_udata *udata)
 855 {
 856         struct mthca_dev *dev = to_mdev(pd->device);
 857         struct ib_umem_chunk *chunk;
 858         struct mthca_mr *mr;
 859         u64 *pages;
 860         int shift, n, len;
 861         int i, j, k;
 862         int err = 0;
 863
 864         shift = ffs(region->page_size) - 1;
 865
 866         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 867         if (!mr)
 868                 return ERR_PTR(-ENOMEM);
 869
 870         n = 0;
 871         list_for_each_entry(chunk, &region->chunk_list, list)
 872                 n += chunk->nents;
 873
 874         mr->mtt = mthca_alloc_mtt(dev, n);
 875         if (IS_ERR(mr->mtt)) {
 876                 err = PTR_ERR(mr->mtt);
 877                 goto err;
 878         }
 879
 880         pages = (u64 *) __get_free_page(GFP_KERNEL);
 881         if (!pages) {
 882                 err = -ENOMEM;
 883                 goto err_mtt;
 884         }
 885
 886         i = n = 0;
 887
 888         list_for_each_entry(chunk, &region->chunk_list, list)
 889                 for (j = 0; j < chunk->nmap; ++j) {
 890                         len = sg_dma_len(&chunk->page_list[j]) >> shift;
 891                         for (k = 0; k < len; ++k) {
 892                                 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
 893                                         region->page_size * k;
 894                                 /*
 895                                  * Be friendly to WRITE_MTT command
 896                                  * and leave two empty slots for the
 897                                  * index and reserved fields of the
 898                                  * mailbox.
 899                                  */
 900                                 if (i == PAGE_SIZE / sizeof (u64) - 2) {
 901                                         err = mthca_write_mtt(dev, mr->mtt,
 902                                                               n, pages, i);
 903                                         if (err)
 904                                                 goto mtt_done;
 905                                         n += i;
 906                                         i = 0;
 907                                 }
 908                         }
 909                 }
 910
 911         if (i)
 912                 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
 913 mtt_done:
 914         free_page((unsigned long) pages);
 915         if (err)
 916                 goto err_mtt;
 917
 918         err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, region->virt_base,
 919                              region->length, convert_access(acc), mr);
 920
 921         if (err)
 922                 goto err_mtt;
 923
 924         return &mr->ibmr;
 925
 926 err_mtt:
 927         mthca_free_mtt(dev, mr->mtt);
 928
 929 err:
 930         kfree(mr);
 931         return ERR_PTR(err);
 932 }
 933
 934 static int mthca_dereg_mr(struct ib_mr *mr)
 935 {
 936         struct mthca_mr *mmr = to_mmr(mr);
 937         mthca_free_mr(to_mdev(mr->device), mmr);
 938         kfree(mmr);
 939         return 0;
 940 }
 941
 942 static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
 943                                       struct ib_fmr_attr *fmr_attr)
 944 {
 945         struct mthca_fmr *fmr;
 946         int err;
 947
 948         fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
 949         if (!fmr)
 950                 return ERR_PTR(-ENOMEM);
 951
 952         memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
 953         err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
 954                              convert_access(mr_access_flags), fmr);
 955
 956         if (err) {
 957                 kfree(fmr);
 958                 return ERR_PTR(err);
 959         }
 960
 961         return &fmr->ibmr;
 962 }
 963
 964 static int mthca_dealloc_fmr(struct ib_fmr *fmr)
 965 {
 966         struct mthca_fmr *mfmr = to_mfmr(fmr);
 967         int err;
 968
 969         err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
 970         if (err)
 971                 return err;
 972
 973         kfree(mfmr);
 974         return 0;
 975 }
 976
 977 static int mthca_unmap_fmr(struct list_head *fmr_list)
 978 {
 979         struct ib_fmr *fmr;
 980         int err;
 981         u8 status;
 982         struct mthca_dev *mdev = NULL;
 983
 984         list_for_each_entry(fmr, fmr_list, list) {
 985                 if (mdev && to_mdev(fmr->device) != mdev)
 986                         return -EINVAL;
 987                 mdev = to_mdev(fmr->device);
 988         }
 989
 990         if (!mdev)
 991                 return 0;
 992
 993         if (mthca_is_memfree(mdev)) {
 994                 list_for_each_entry(fmr, fmr_list, list)
 995                         mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
 996
 997                 wmb();
 998         } else
 999                 list_for_each_entry(fmr, fmr_list, list)
1000                         mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
1001
1002         err = mthca_SYNC_TPT(mdev, &status);
1003         if (err)
1004                 return err;
1005         if (status)
1006                 return -EINVAL;
1007         return 0;
1008 }
1009
1010 static ssize_t show_rev(struct class_device *cdev, char *buf)
1011 {
1012         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1013         return sprintf(buf, "%x\n", dev->rev_id);
1014 }
1015
1016 static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
1017 {
1018         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1019         return sprintf(buf, "%d.%d.%d\n", (int) (dev->fw_ver >> 32),
1020                        (int) (dev->fw_ver >> 16) & 0xffff,
1021                        (int) dev->fw_ver & 0xffff);
1022 }
1023
1024 static ssize_t show_hca(struct class_device *cdev, char *buf)
1025 {
1026         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1027         switch (dev->pdev->device) {
1028         case PCI_DEVICE_ID_MELLANOX_TAVOR:
1029                 return sprintf(buf, "MT23108\n");
1030         case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
1031                 return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
1032         case PCI_DEVICE_ID_MELLANOX_ARBEL:
1033                 return sprintf(buf, "MT25208\n");
1034         case PCI_DEVICE_ID_MELLANOX_SINAI:
1035         case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
1036                 return sprintf(buf, "MT25204\n");
1037         default:
1038                 return sprintf(buf, "unknown\n");
1039         }
1040 }
1041
1042 static ssize_t show_board(struct class_device *cdev, char *buf)
1043 {
1044         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1045         return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
1046 }
1047
1048 static CLASS_DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
1049 static CLASS_DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
1050 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
1051 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
1052
1053 static struct class_device_attribute *mthca_class_attributes[] = {
1054         &class_device_attr_hw_rev,
1055         &class_device_attr_fw_ver,
1056         &class_device_attr_hca_type,
1057         &class_device_attr_board_id
1058 };
1059
1060 static int mthca_init_node_data(struct mthca_dev *dev)
1061 {
1062         struct ib_smp *in_mad  = NULL;
1063         struct ib_smp *out_mad = NULL;
1064         int err = -ENOMEM;
1065         u8 status;
1066
1067         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
1068         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1069         if (!in_mad || !out_mad)
1070                 goto out;
1071
1072         init_query_mad(in_mad);
1073         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
1074
1075         err = mthca_MAD_IFC(dev, 1, 1,
1076                             1, NULL, NULL, in_mad, out_mad,
1077                             &status);
1078         if (err)
1079                 goto out;
1080         if (status) {
1081                 err = -EINVAL;
1082                 goto out;
1083         }
1084
1085         memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
1086
1087 out:
1088         kfree(in_mad);
1089         kfree(out_mad);
1090         return err;
1091 }
1092
1093 int mthca_register_device(struct mthca_dev *dev)
1094 {
1095         int ret;
1096         int i;
1097
1098         ret = mthca_init_node_data(dev);
1099         if (ret)
1100                 return ret;
1101
1102         strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
1103         dev->ib_dev.owner                = THIS_MODULE;
1104
1105         dev->ib_dev.uverbs_abi_ver       = MTHCA_UVERBS_ABI_VERSION;
1106         dev->ib_dev.uverbs_cmd_mask      =
1107                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
1108                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
1109                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
1110                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
1111                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
1112                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
1113                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
1114                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1115                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
1116                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
1117                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
1118                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
1119                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
1120                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
1121                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
1122                 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
1123                 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
1124                 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
1125         dev->ib_dev.node_type            = IB_NODE_CA;
1126         dev->ib_dev.phys_port_cnt        = dev->limits.num_ports;
1127         dev->ib_dev.dma_device           = &dev->pdev->dev;
1128         dev->ib_dev.class_dev.dev        = &dev->pdev->dev;
1129         dev->ib_dev.query_device         = mthca_query_device;
1130         dev->ib_dev.query_port           = mthca_query_port;
1131         dev->ib_dev.modify_port          = mthca_modify_port;
1132         dev->ib_dev.query_pkey           = mthca_query_pkey;
1133         dev->ib_dev.query_gid            = mthca_query_gid;
1134         dev->ib_dev.alloc_ucontext       = mthca_alloc_ucontext;
1135         dev->ib_dev.dealloc_ucontext     = mthca_dealloc_ucontext;
1136         dev->ib_dev.mmap                 = mthca_mmap_uar;
1137         dev->ib_dev.alloc_pd             = mthca_alloc_pd;
1138         dev->ib_dev.dealloc_pd           = mthca_dealloc_pd;
1139         dev->ib_dev.create_ah            = mthca_ah_create;
1140         dev->ib_dev.destroy_ah           = mthca_ah_destroy;
1141
1142         if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1143                 dev->ib_dev.create_srq           = mthca_create_srq;
1144                 dev->ib_dev.modify_srq           = mthca_modify_srq;
1145                 dev->ib_dev.destroy_srq          = mthca_destroy_srq;
1146
1147                 if (mthca_is_memfree(dev))
1148                         dev->ib_dev.post_srq_recv = mthca_arbel_post_srq_recv;
1149                 else
1150                         dev->ib_dev.post_srq_recv = mthca_tavor_post_srq_recv;
1151         }
1152
1153         dev->ib_dev.create_qp            = mthca_create_qp;
1154         dev->ib_dev.modify_qp            = mthca_modify_qp;
1155         dev->ib_dev.destroy_qp           = mthca_destroy_qp;
1156         dev->ib_dev.create_cq            = mthca_create_cq;
1157         dev->ib_dev.destroy_cq           = mthca_destroy_cq;
1158         dev->ib_dev.poll_cq              = mthca_poll_cq;
1159         dev->ib_dev.get_dma_mr           = mthca_get_dma_mr;
1160         dev->ib_dev.reg_phys_mr          = mthca_reg_phys_mr;
1161         dev->ib_dev.reg_user_mr          = mthca_reg_user_mr;
1162         dev->ib_dev.dereg_mr             = mthca_dereg_mr;
1163
1164         if (dev->mthca_flags & MTHCA_FLAG_FMR) {
1165                 dev->ib_dev.alloc_fmr            = mthca_alloc_fmr;
1166                 dev->ib_dev.unmap_fmr            = mthca_unmap_fmr;
1167                 dev->ib_dev.dealloc_fmr          = mthca_dealloc_fmr;
1168                 if (mthca_is_memfree(dev))
1169                         dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
1170                 else
1171                         dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
1172         }
1173
1174         dev->ib_dev.attach_mcast         = mthca_multicast_attach;
1175         dev->ib_dev.detach_mcast         = mthca_multicast_detach;
1176         dev->ib_dev.process_mad          = mthca_process_mad;
1177
1178         if (mthca_is_memfree(dev)) {
1179                 dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
1180                 dev->ib_dev.post_send     = mthca_arbel_post_send;
1181                 dev->ib_dev.post_recv     = mthca_arbel_post_receive;
1182         } else {
1183                 dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
1184                 dev->ib_dev.post_send     = mthca_tavor_post_send;
1185                 dev->ib_dev.post_recv     = mthca_tavor_post_receive;
1186         }
1187
1188         init_MUTEX(&dev->cap_mask_mutex);
1189
1190         ret = ib_register_device(&dev->ib_dev);
1191         if (ret)
1192                 return ret;
1193
1194         for (i = 0; i < ARRAY_SIZE(mthca_class_attributes); ++i) {
1195                 ret = class_device_create_file(&dev->ib_dev.class_dev,
1196                                                mthca_class_attributes[i]);
1197                 if (ret) {
1198                         ib_unregister_device(&dev->ib_dev);
1199                         return ret;
1200                 }
1201         }
1202
1203         mthca_start_catas_poll(dev);
1204
1205         return 0;
1206 }
1207
1208 void mthca_unregister_device(struct mthca_dev *dev)
1209 {
1210         mthca_stop_catas_poll(dev);
1211         ib_unregister_device(&dev->ib_dev);
1212 }