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 1397 2004-12-28 05:09:00Z 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 int mthca_query_device(struct ib_device *ibdev,
  49                               struct ib_device_attr *props)
  50 {
  51         struct ib_smp *in_mad  = NULL;
  52         struct ib_smp *out_mad = NULL;
  53         int err = -ENOMEM;
  54         struct mthca_dev* mdev = to_mdev(ibdev);
  55
  56         u8 status;
  57
  58         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
  59         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
  60         if (!in_mad || !out_mad)
  61                 goto out;
  62
  63         memset(props, 0, sizeof *props);
  64
  65         props->fw_ver              = mdev->fw_ver;
  66
  67         memset(in_mad, 0, sizeof *in_mad);
  68         in_mad->base_version       = 1;
  69         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
  70         in_mad->class_version      = 1;
  71         in_mad->method             = IB_MGMT_METHOD_GET;
  72         in_mad->attr_id            = IB_SMP_ATTR_NODE_INFO;
  73
  74         err = mthca_MAD_IFC(mdev, 1, 1,
  75                             1, NULL, NULL, in_mad, out_mad,
  76                             &status);
  77         if (err)
  78                 goto out;
  79         if (status) {
  80                 err = -EINVAL;
  81                 goto out;
  82         }
  83
  84         props->device_cap_flags    = mdev->device_cap_flags;
  85         props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
  86                 0xffffff;
  87         props->vendor_part_id      = be16_to_cpup((__be16 *) (out_mad->data + 30));
  88         props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
  89         memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
  90         memcpy(&props->node_guid,      out_mad->data + 12, 8);
  91
  92         props->max_mr_size         = ~0ull;
  93         props->max_qp              = mdev->limits.num_qps - mdev->limits.reserved_qps;
  94         props->max_qp_wr           = mdev->limits.max_wqes;
  95         props->max_sge             = mdev->limits.max_sg;
  96         props->max_cq              = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
  97         props->max_cqe             = mdev->limits.max_cqes;
  98         props->max_mr              = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
  99         props->max_pd              = mdev->limits.num_pds - mdev->limits.reserved_pds;
 100         props->max_qp_rd_atom      = 1 << mdev->qp_table.rdb_shift;
 101         props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma;
 102         props->max_res_rd_atom     = props->max_qp_rd_atom * props->max_qp;
 103         props->max_srq             = mdev->limits.num_srqs - mdev->limits.reserved_srqs;
 104         props->max_srq_wr          = mdev->limits.max_srq_wqes;
 105         props->max_srq_sge         = mdev->limits.max_sg;
 106         props->local_ca_ack_delay  = mdev->limits.local_ca_ack_delay;
 107         props->atomic_cap          = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
 108                                         IB_ATOMIC_HCA : IB_ATOMIC_NONE;
 109         props->max_pkeys           = mdev->limits.pkey_table_len;
 110         props->max_mcast_grp       = mdev->limits.num_mgms + mdev->limits.num_amgms;
 111         props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
 112         props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 113                                            props->max_mcast_grp;
 114
 115         err = 0;
 116  out:
 117         kfree(in_mad);
 118         kfree(out_mad);
 119         return err;
 120 }
 121
 122 static int mthca_query_port(struct ib_device *ibdev,
 123                             u8 port, struct ib_port_attr *props)
 124 {
 125         struct ib_smp *in_mad  = NULL;
 126         struct ib_smp *out_mad = NULL;
 127         int err = -ENOMEM;
 128         u8 status;
 129
 130         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
 131         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 132         if (!in_mad || !out_mad)
 133                 goto out;
 134
 135         memset(props, 0, sizeof *props);
 136
 137         memset(in_mad, 0, sizeof *in_mad);
 138         in_mad->base_version       = 1;
 139         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
 140         in_mad->class_version      = 1;
 141         in_mad->method             = IB_MGMT_METHOD_GET;
 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  = kmalloc(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         memset(in_mad, 0, sizeof *in_mad);
 228         in_mad->base_version       = 1;
 229         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
 230         in_mad->class_version      = 1;
 231         in_mad->method             = IB_MGMT_METHOD_GET;
 232         in_mad->attr_id            = IB_SMP_ATTR_PKEY_TABLE;
 233         in_mad->attr_mod           = cpu_to_be32(index / 32);
 234
 235         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 236                             port, NULL, NULL, in_mad, out_mad,
 237                             &status);
 238         if (err)
 239                 goto out;
 240         if (status) {
 241                 err = -EINVAL;
 242                 goto out;
 243         }
 244
 245         *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
 246
 247  out:
 248         kfree(in_mad);
 249         kfree(out_mad);
 250         return err;
 251 }
 252
 253 static int mthca_query_gid(struct ib_device *ibdev, u8 port,
 254                            int index, union ib_gid *gid)
 255 {
 256         struct ib_smp *in_mad  = NULL;
 257         struct ib_smp *out_mad = NULL;
 258         int err = -ENOMEM;
 259         u8 status;
 260
 261         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
 262         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 263         if (!in_mad || !out_mad)
 264                 goto out;
 265
 266         memset(in_mad, 0, sizeof *in_mad);
 267         in_mad->base_version       = 1;
 268         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
 269         in_mad->class_version      = 1;
 270         in_mad->method             = IB_MGMT_METHOD_GET;
 271         in_mad->attr_id            = IB_SMP_ATTR_PORT_INFO;
 272         in_mad->attr_mod           = cpu_to_be32(port);
 273
 274         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 275                             port, NULL, NULL, in_mad, out_mad,
 276                             &status);
 277         if (err)
 278                 goto out;
 279         if (status) {
 280                 err = -EINVAL;
 281                 goto out;
 282         }
 283
 284         memcpy(gid->raw, out_mad->data + 8, 8);
 285
 286         memset(in_mad, 0, sizeof *in_mad);
 287         in_mad->base_version       = 1;
 288         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
 289         in_mad->class_version      = 1;
 290         in_mad->method             = IB_MGMT_METHOD_GET;
 291         in_mad->attr_id            = IB_SMP_ATTR_GUID_INFO;
 292         in_mad->attr_mod           = cpu_to_be32(index / 8);
 293
 294         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 295                             port, NULL, NULL, in_mad, out_mad,
 296                             &status);
 297         if (err)
 298                 goto out;
 299         if (status) {
 300                 err = -EINVAL;
 301                 goto out;
 302         }
 303
 304         memcpy(gid->raw + 8, out_mad->data + (index % 8) * 16, 8);
 305
 306  out:
 307         kfree(in_mad);
 308         kfree(out_mad);
 309         return err;
 310 }
 311
 312 static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
 313                                                 struct ib_udata *udata)
 314 {
 315         struct mthca_alloc_ucontext_resp uresp;
 316         struct mthca_ucontext           *context;
 317         int                              err;
 318
 319         memset(&uresp, 0, sizeof uresp);
 320
 321         uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
 322         if (mthca_is_memfree(to_mdev(ibdev)))
 323                 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
 324         else
 325                 uresp.uarc_size = 0;
 326
 327         context = kmalloc(sizeof *context, GFP_KERNEL);
 328         if (!context)
 329                 return ERR_PTR(-ENOMEM);
 330
 331         err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
 332         if (err) {
 333                 kfree(context);
 334                 return ERR_PTR(err);
 335         }
 336
 337         context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
 338         if (IS_ERR(context->db_tab)) {
 339                 err = PTR_ERR(context->db_tab);
 340                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 341                 kfree(context);
 342                 return ERR_PTR(err);
 343         }
 344
 345         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 346                 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
 347                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 348                 kfree(context);
 349                 return ERR_PTR(-EFAULT);
 350         }
 351
 352         return &context->ibucontext;
 353 }
 354
 355 static int mthca_dealloc_ucontext(struct ib_ucontext *context)
 356 {
 357         mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
 358                                   to_mucontext(context)->db_tab);
 359         mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
 360         kfree(to_mucontext(context));
 361
 362         return 0;
 363 }
 364
 365 static int mthca_mmap_uar(struct ib_ucontext *context,
 366                           struct vm_area_struct *vma)
 367 {
 368         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
 369                 return -EINVAL;
 370
 371         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 372
 373         if (io_remap_pfn_range(vma, vma->vm_start,
 374                                to_mucontext(context)->uar.pfn,
 375                                PAGE_SIZE, vma->vm_page_prot))
 376                 return -EAGAIN;
 377
 378         return 0;
 379 }
 380
 381 static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
 382                                     struct ib_ucontext *context,
 383                                     struct ib_udata *udata)
 384 {
 385         struct mthca_pd *pd;
 386         int err;
 387
 388         pd = kmalloc(sizeof *pd, GFP_KERNEL);
 389         if (!pd)
 390                 return ERR_PTR(-ENOMEM);
 391
 392         err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
 393         if (err) {
 394                 kfree(pd);
 395                 return ERR_PTR(err);
 396         }
 397
 398         if (context) {
 399                 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
 400                         mthca_pd_free(to_mdev(ibdev), pd);
 401                         kfree(pd);
 402                         return ERR_PTR(-EFAULT);
 403                 }
 404         }
 405
 406         return &pd->ibpd;
 407 }
 408
 409 static int mthca_dealloc_pd(struct ib_pd *pd)
 410 {
 411         mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
 412         kfree(pd);
 413
 414         return 0;
 415 }
 416
 417 static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
 418                                      struct ib_ah_attr *ah_attr)
 419 {
 420         int err;
 421         struct mthca_ah *ah;
 422
 423         ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 424         if (!ah)
 425                 return ERR_PTR(-ENOMEM);
 426
 427         err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
 428         if (err) {
 429                 kfree(ah);
 430                 return ERR_PTR(err);
 431         }
 432
 433         return &ah->ibah;
 434 }
 435
 436 static int mthca_ah_destroy(struct ib_ah *ah)
 437 {
 438         mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
 439         kfree(ah);
 440
 441         return 0;
 442 }
 443
 444 static struct ib_srq *mthca_create_srq(struct ib_pd *pd,
 445                                        struct ib_srq_init_attr *init_attr,
 446                                        struct ib_udata *udata)
 447 {
 448         struct mthca_create_srq ucmd;
 449         struct mthca_ucontext *context = NULL;
 450         struct mthca_srq *srq;
 451         int err;
 452
 453         srq = kmalloc(sizeof *srq, GFP_KERNEL);
 454         if (!srq)
 455                 return ERR_PTR(-ENOMEM);
 456
 457         if (pd->uobject) {
 458                 context = to_mucontext(pd->uobject->context);
 459
 460                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 461                         return ERR_PTR(-EFAULT);
 462
 463                 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 464                                         context->db_tab, ucmd.db_index,
 465                                         ucmd.db_page);
 466
 467                 if (err)
 468                         goto err_free;
 469
 470                 srq->mr.ibmr.lkey = ucmd.lkey;
 471                 srq->db_index     = ucmd.db_index;
 472         }
 473
 474         err = mthca_alloc_srq(to_mdev(pd->device), to_mpd(pd),
 475                               &init_attr->attr, srq);
 476
 477         if (err && pd->uobject)
 478                 mthca_unmap_user_db(to_mdev(pd->device), &context->uar,
 479                                     context->db_tab, ucmd.db_index);
 480
 481         if (err)
 482                 goto err_free;
 483
 484         if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof (__u32))) {
 485                 mthca_free_srq(to_mdev(pd->device), srq);
 486                 err = -EFAULT;
 487                 goto err_free;
 488         }
 489
 490         return &srq->ibsrq;
 491
 492 err_free:
 493         kfree(srq);
 494
 495         return ERR_PTR(err);
 496 }
 497
 498 static int mthca_destroy_srq(struct ib_srq *srq)
 499 {
 500         struct mthca_ucontext *context;
 501
 502         if (srq->uobject) {
 503                 context = to_mucontext(srq->uobject->context);
 504
 505                 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
 506                                     context->db_tab, to_msrq(srq)->db_index);
 507         }
 508
 509         mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
 510         kfree(srq);
 511
 512         return 0;
 513 }
 514
 515 static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
 516                                      struct ib_qp_init_attr *init_attr,
 517                                      struct ib_udata *udata)
 518 {
 519         struct mthca_create_qp ucmd;
 520         struct mthca_qp *qp;
 521         int err;
 522
 523         switch (init_attr->qp_type) {
 524         case IB_QPT_RC:
 525         case IB_QPT_UC:
 526         case IB_QPT_UD:
 527         {
 528                 struct mthca_ucontext *context;
 529
 530                 qp = kmalloc(sizeof *qp, GFP_KERNEL);
 531                 if (!qp)
 532                         return ERR_PTR(-ENOMEM);
 533
 534                 if (pd->uobject) {
 535                         context = to_mucontext(pd->uobject->context);
 536
 537                         if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 538                                 return ERR_PTR(-EFAULT);
 539
 540                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 541                                                 context->db_tab,
 542                                                 ucmd.sq_db_index, ucmd.sq_db_page);
 543                         if (err) {
 544                                 kfree(qp);
 545                                 return ERR_PTR(err);
 546                         }
 547
 548                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 549                                                 context->db_tab,
 550                                                 ucmd.rq_db_index, ucmd.rq_db_page);
 551                         if (err) {
 552                                 mthca_unmap_user_db(to_mdev(pd->device),
 553                                                     &context->uar,
 554                                                     context->db_tab,
 555                                                     ucmd.sq_db_index);
 556                                 kfree(qp);
 557                                 return ERR_PTR(err);
 558                         }
 559
 560                         qp->mr.ibmr.lkey = ucmd.lkey;
 561                         qp->sq.db_index  = ucmd.sq_db_index;
 562                         qp->rq.db_index  = ucmd.rq_db_index;
 563                 }
 564
 565                 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
 566                                      to_mcq(init_attr->send_cq),
 567                                      to_mcq(init_attr->recv_cq),
 568                                      init_attr->qp_type, init_attr->sq_sig_type,
 569                                      &init_attr->cap, qp);
 570
 571                 if (err && pd->uobject) {
 572                         context = to_mucontext(pd->uobject->context);
 573
 574                         mthca_unmap_user_db(to_mdev(pd->device),
 575                                             &context->uar,
 576                                             context->db_tab,
 577                                             ucmd.sq_db_index);
 578                         mthca_unmap_user_db(to_mdev(pd->device),
 579                                             &context->uar,
 580                                             context->db_tab,
 581                                             ucmd.rq_db_index);
 582                 }
 583
 584                 qp->ibqp.qp_num = qp->qpn;
 585                 break;
 586         }
 587         case IB_QPT_SMI:
 588         case IB_QPT_GSI:
 589         {
 590                 /* Don't allow userspace to create special QPs */
 591                 if (pd->uobject)
 592                         return ERR_PTR(-EINVAL);
 593
 594                 qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
 595                 if (!qp)
 596                         return ERR_PTR(-ENOMEM);
 597
 598                 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
 599
 600                 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
 601                                       to_mcq(init_attr->send_cq),
 602                                       to_mcq(init_attr->recv_cq),
 603                                       init_attr->sq_sig_type, &init_attr->cap,
 604                                       qp->ibqp.qp_num, init_attr->port_num,
 605                                       to_msqp(qp));
 606                 break;
 607         }
 608         default:
 609                 /* Don't support raw QPs */
 610                 return ERR_PTR(-ENOSYS);
 611         }
 612
 613         if (err) {
 614                 kfree(qp);
 615                 return ERR_PTR(err);
 616         }
 617
 618         init_attr->cap.max_inline_data = 0;
 619         init_attr->cap.max_send_wr     = qp->sq.max;
 620         init_attr->cap.max_recv_wr     = qp->rq.max;
 621         init_attr->cap.max_send_sge    = qp->sq.max_gs;
 622         init_attr->cap.max_recv_sge    = qp->rq.max_gs;
 623
 624         return &qp->ibqp;
 625 }
 626
 627 static int mthca_destroy_qp(struct ib_qp *qp)
 628 {
 629         if (qp->uobject) {
 630                 mthca_unmap_user_db(to_mdev(qp->device),
 631                                     &to_mucontext(qp->uobject->context)->uar,
 632                                     to_mucontext(qp->uobject->context)->db_tab,
 633                                     to_mqp(qp)->sq.db_index);
 634                 mthca_unmap_user_db(to_mdev(qp->device),
 635                                     &to_mucontext(qp->uobject->context)->uar,
 636                                     to_mucontext(qp->uobject->context)->db_tab,
 637                                     to_mqp(qp)->rq.db_index);
 638         }
 639         mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
 640         kfree(qp);
 641         return 0;
 642 }
 643
 644 static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
 645                                      struct ib_ucontext *context,
 646                                      struct ib_udata *udata)
 647 {
 648         struct mthca_create_cq ucmd;
 649         struct mthca_cq *cq;
 650         int nent;
 651         int err;
 652
 653         if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
 654                 return ERR_PTR(-EINVAL);
 655
 656         if (context) {
 657                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 658                         return ERR_PTR(-EFAULT);
 659
 660                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 661                                         to_mucontext(context)->db_tab,
 662                                         ucmd.set_db_index, ucmd.set_db_page);
 663                 if (err)
 664                         return ERR_PTR(err);
 665
 666                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 667                                         to_mucontext(context)->db_tab,
 668                                         ucmd.arm_db_index, ucmd.arm_db_page);
 669                 if (err)
 670                         goto err_unmap_set;
 671         }
 672
 673         cq = kmalloc(sizeof *cq, GFP_KERNEL);
 674         if (!cq) {
 675                 err = -ENOMEM;
 676                 goto err_unmap_arm;
 677         }
 678
 679         if (context) {
 680                 cq->mr.ibmr.lkey    = ucmd.lkey;
 681                 cq->set_ci_db_index = ucmd.set_db_index;
 682                 cq->arm_db_index    = ucmd.arm_db_index;
 683         }
 684
 685         for (nent = 1; nent <= entries; nent <<= 1)
 686                 ; /* nothing */
 687
 688         err = mthca_init_cq(to_mdev(ibdev), nent,
 689                             context ? to_mucontext(context) : NULL,
 690                             context ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
 691                             cq);
 692         if (err)
 693                 goto err_free;
 694
 695         if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
 696                 mthca_free_cq(to_mdev(ibdev), cq);
 697                 goto err_free;
 698         }
 699
 700         return &cq->ibcq;
 701
 702 err_free:
 703         kfree(cq);
 704
 705 err_unmap_arm:
 706         if (context)
 707                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 708                                     to_mucontext(context)->db_tab, ucmd.arm_db_index);
 709
 710 err_unmap_set:
 711         if (context)
 712                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 713                                     to_mucontext(context)->db_tab, ucmd.set_db_index);
 714
 715         return ERR_PTR(err);
 716 }
 717
 718 static int mthca_destroy_cq(struct ib_cq *cq)
 719 {
 720         if (cq->uobject) {
 721                 mthca_unmap_user_db(to_mdev(cq->device),
 722                                     &to_mucontext(cq->uobject->context)->uar,
 723                                     to_mucontext(cq->uobject->context)->db_tab,
 724                                     to_mcq(cq)->arm_db_index);
 725                 mthca_unmap_user_db(to_mdev(cq->device),
 726                                     &to_mucontext(cq->uobject->context)->uar,
 727                                     to_mucontext(cq->uobject->context)->db_tab,
 728                                     to_mcq(cq)->set_ci_db_index);
 729         }
 730         mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
 731         kfree(cq);
 732
 733         return 0;
 734 }
 735
 736 static inline u32 convert_access(int acc)
 737 {
 738         return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC       : 0) |
 739                (acc & IB_ACCESS_REMOTE_WRITE  ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
 740                (acc & IB_ACCESS_REMOTE_READ   ? MTHCA_MPT_FLAG_REMOTE_READ  : 0) |
 741                (acc & IB_ACCESS_LOCAL_WRITE   ? MTHCA_MPT_FLAG_LOCAL_WRITE  : 0) |
 742                MTHCA_MPT_FLAG_LOCAL_READ;
 743 }
 744
 745 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
 746 {
 747         struct mthca_mr *mr;
 748         int err;
 749
 750         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 751         if (!mr)
 752                 return ERR_PTR(-ENOMEM);
 753
 754         err = mthca_mr_alloc_notrans(to_mdev(pd->device),
 755                                      to_mpd(pd)->pd_num,
 756                                      convert_access(acc), mr);
 757
 758         if (err) {
 759                 kfree(mr);
 760                 return ERR_PTR(err);
 761         }
 762
 763         return &mr->ibmr;
 764 }
 765
 766 static struct ib_mr *mthca_reg_phys_mr(struct ib_pd       *pd,
 767                                        struct ib_phys_buf *buffer_list,
 768                                        int                 num_phys_buf,
 769                                        int                 acc,
 770                                        u64                *iova_start)
 771 {
 772         struct mthca_mr *mr;
 773         u64 *page_list;
 774         u64 total_size;
 775         u64 mask;
 776         int shift;
 777         int npages;
 778         int err;
 779         int i, j, n;
 780
 781         /* First check that we have enough alignment */
 782         if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK))
 783                 return ERR_PTR(-EINVAL);
 784
 785         if (num_phys_buf > 1 &&
 786             ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK))
 787                 return ERR_PTR(-EINVAL);
 788
 789         mask = 0;
 790         total_size = 0;
 791         for (i = 0; i < num_phys_buf; ++i) {
 792                 if (i != 0 && buffer_list[i].addr & ~PAGE_MASK)
 793                         return ERR_PTR(-EINVAL);
 794                 if (i != 0 && i != num_phys_buf - 1 &&
 795                     (buffer_list[i].size & ~PAGE_MASK))
 796                         return ERR_PTR(-EINVAL);
 797
 798                 total_size += buffer_list[i].size;
 799                 if (i > 0)
 800                         mask |= buffer_list[i].addr;
 801         }
 802
 803         /* Find largest page shift we can use to cover buffers */
 804         for (shift = PAGE_SHIFT; shift < 31; ++shift)
 805                 if (num_phys_buf > 1) {
 806                         if ((1ULL << shift) & mask)
 807                                 break;
 808                 } else {
 809                         if (1ULL << shift >=
 810                             buffer_list[0].size +
 811                             (buffer_list[0].addr & ((1ULL << shift) - 1)))
 812                                 break;
 813                 }
 814
 815         buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
 816         buffer_list[0].addr &= ~0ull << shift;
 817
 818         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 819         if (!mr)
 820                 return ERR_PTR(-ENOMEM);
 821
 822         npages = 0;
 823         for (i = 0; i < num_phys_buf; ++i)
 824                 npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 825
 826         if (!npages)
 827                 return &mr->ibmr;
 828
 829         page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
 830         if (!page_list) {
 831                 kfree(mr);
 832                 return ERR_PTR(-ENOMEM);
 833         }
 834
 835         n = 0;
 836         for (i = 0; i < num_phys_buf; ++i)
 837                 for (j = 0;
 838                      j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 839                      ++j)
 840                         page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
 841
 842         mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
 843                   "in PD %x; shift %d, npages %d.\n",
 844                   (unsigned long long) buffer_list[0].addr,
 845                   (unsigned long long) *iova_start,
 846                   to_mpd(pd)->pd_num,
 847                   shift, npages);
 848
 849         err = mthca_mr_alloc_phys(to_mdev(pd->device),
 850                                   to_mpd(pd)->pd_num,
 851                                   page_list, shift, npages,
 852                                   *iova_start, total_size,
 853                                   convert_access(acc), mr);
 854
 855         if (err) {
 856                 kfree(page_list);
 857                 kfree(mr);
 858                 return ERR_PTR(err);
 859         }
 860
 861         kfree(page_list);
 862         return &mr->ibmr;
 863 }
 864
 865 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 866                                        int acc, struct ib_udata *udata)
 867 {
 868         struct mthca_dev *dev = to_mdev(pd->device);
 869         struct ib_umem_chunk *chunk;
 870         struct mthca_mr *mr;
 871         u64 *pages;
 872         int shift, n, len;
 873         int i, j, k;
 874         int err = 0;
 875
 876         shift = ffs(region->page_size) - 1;
 877
 878         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 879         if (!mr)
 880                 return ERR_PTR(-ENOMEM);
 881
 882         n = 0;
 883         list_for_each_entry(chunk, &region->chunk_list, list)
 884                 n += chunk->nents;
 885
 886         mr->mtt = mthca_alloc_mtt(dev, n);
 887         if (IS_ERR(mr->mtt)) {
 888                 err = PTR_ERR(mr->mtt);
 889                 goto err;
 890         }
 891
 892         pages = (u64 *) __get_free_page(GFP_KERNEL);
 893         if (!pages) {
 894                 err = -ENOMEM;
 895                 goto err_mtt;
 896         }
 897
 898         i = n = 0;
 899
 900         list_for_each_entry(chunk, &region->chunk_list, list)
 901                 for (j = 0; j < chunk->nmap; ++j) {
 902                         len = sg_dma_len(&chunk->page_list[j]) >> shift;
 903                         for (k = 0; k < len; ++k) {
 904                                 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
 905                                         region->page_size * k;
 906                                 /*
 907                                  * Be friendly to WRITE_MTT command
 908                                  * and leave two empty slots for the
 909                                  * index and reserved fields of the
 910                                  * mailbox.
 911                                  */
 912                                 if (i == PAGE_SIZE / sizeof (u64) - 2) {
 913                                         err = mthca_write_mtt(dev, mr->mtt,
 914                                                               n, pages, i);
 915                                         if (err)
 916                                                 goto mtt_done;
 917                                         n += i;
 918                                         i = 0;
 919                                 }
 920                         }
 921                 }
 922
 923         if (i)
 924                 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
 925 mtt_done:
 926         free_page((unsigned long) pages);
 927         if (err)
 928                 goto err_mtt;
 929
 930         err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, region->virt_base,
 931                              region->length, convert_access(acc), mr);
 932
 933         if (err)
 934                 goto err_mtt;
 935
 936         return &mr->ibmr;
 937
 938 err_mtt:
 939         mthca_free_mtt(dev, mr->mtt);
 940
 941 err:
 942         kfree(mr);
 943         return ERR_PTR(err);
 944 }
 945
 946 static int mthca_dereg_mr(struct ib_mr *mr)
 947 {
 948         struct mthca_mr *mmr = to_mmr(mr);
 949         mthca_free_mr(to_mdev(mr->device), mmr);
 950         kfree(mmr);
 951         return 0;
 952 }
 953
 954 static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
 955                                       struct ib_fmr_attr *fmr_attr)
 956 {
 957         struct mthca_fmr *fmr;
 958         int err;
 959
 960         fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
 961         if (!fmr)
 962                 return ERR_PTR(-ENOMEM);
 963
 964         memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
 965         err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
 966                              convert_access(mr_access_flags), fmr);
 967
 968         if (err) {
 969                 kfree(fmr);
 970                 return ERR_PTR(err);
 971         }
 972
 973         return &fmr->ibmr;
 974 }
 975
 976 static int mthca_dealloc_fmr(struct ib_fmr *fmr)
 977 {
 978         struct mthca_fmr *mfmr = to_mfmr(fmr);
 979         int err;
 980
 981         err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
 982         if (err)
 983                 return err;
 984
 985         kfree(mfmr);
 986         return 0;
 987 }
 988
 989 static int mthca_unmap_fmr(struct list_head *fmr_list)
 990 {
 991         struct ib_fmr *fmr;
 992         int err;
 993         u8 status;
 994         struct mthca_dev *mdev = NULL;
 995
 996         list_for_each_entry(fmr, fmr_list, list) {
 997                 if (mdev && to_mdev(fmr->device) != mdev)
 998                         return -EINVAL;
 999                 mdev = to_mdev(fmr->device);
1000         }
1001
1002         if (!mdev)
1003                 return 0;
1004
1005         if (mthca_is_memfree(mdev)) {
1006                 list_for_each_entry(fmr, fmr_list, list)
1007                         mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
1008
1009                 wmb();
1010         } else
1011                 list_for_each_entry(fmr, fmr_list, list)
1012                         mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
1013
1014         err = mthca_SYNC_TPT(mdev, &status);
1015         if (err)
1016                 return err;
1017         if (status)
1018                 return -EINVAL;
1019         return 0;
1020 }
1021
1022 static ssize_t show_rev(struct class_device *cdev, char *buf)
1023 {
1024         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1025         return sprintf(buf, "%x\n", dev->rev_id);
1026 }
1027
1028 static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
1029 {
1030         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1031         return sprintf(buf, "%d.%d.%d\n", (int) (dev->fw_ver >> 32),
1032                        (int) (dev->fw_ver >> 16) & 0xffff,
1033                        (int) dev->fw_ver & 0xffff);
1034 }
1035
1036 static ssize_t show_hca(struct class_device *cdev, char *buf)
1037 {
1038         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1039         switch (dev->pdev->device) {
1040         case PCI_DEVICE_ID_MELLANOX_TAVOR:
1041                 return sprintf(buf, "MT23108\n");
1042         case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
1043                 return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
1044         case PCI_DEVICE_ID_MELLANOX_ARBEL:
1045                 return sprintf(buf, "MT25208\n");
1046         case PCI_DEVICE_ID_MELLANOX_SINAI:
1047         case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
1048                 return sprintf(buf, "MT25204\n");
1049         default:
1050                 return sprintf(buf, "unknown\n");
1051         }
1052 }
1053
1054 static ssize_t show_board(struct class_device *cdev, char *buf)
1055 {
1056         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1057         return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
1058 }
1059
1060 static CLASS_DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
1061 static CLASS_DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
1062 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
1063 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
1064
1065 static struct class_device_attribute *mthca_class_attributes[] = {
1066         &class_device_attr_hw_rev,
1067         &class_device_attr_fw_ver,
1068         &class_device_attr_hca_type,
1069         &class_device_attr_board_id
1070 };
1071
1072 int mthca_register_device(struct mthca_dev *dev)
1073 {
1074         int ret;
1075         int i;
1076
1077         strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
1078         dev->ib_dev.owner                = THIS_MODULE;
1079
1080         dev->ib_dev.uverbs_abi_ver       = MTHCA_UVERBS_ABI_VERSION;
1081         dev->ib_dev.uverbs_cmd_mask      =
1082                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
1083                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
1084                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
1085                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
1086                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
1087                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
1088                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
1089                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1090                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
1091                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
1092                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
1093                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
1094                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
1095                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
1096                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
1097                 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
1098                 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
1099                 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
1100         dev->ib_dev.node_type            = IB_NODE_CA;
1101         dev->ib_dev.phys_port_cnt        = dev->limits.num_ports;
1102         dev->ib_dev.dma_device           = &dev->pdev->dev;
1103         dev->ib_dev.class_dev.dev        = &dev->pdev->dev;
1104         dev->ib_dev.query_device         = mthca_query_device;
1105         dev->ib_dev.query_port           = mthca_query_port;
1106         dev->ib_dev.modify_port          = mthca_modify_port;
1107         dev->ib_dev.query_pkey           = mthca_query_pkey;
1108         dev->ib_dev.query_gid            = mthca_query_gid;
1109         dev->ib_dev.alloc_ucontext       = mthca_alloc_ucontext;
1110         dev->ib_dev.dealloc_ucontext     = mthca_dealloc_ucontext;
1111         dev->ib_dev.mmap                 = mthca_mmap_uar;
1112         dev->ib_dev.alloc_pd             = mthca_alloc_pd;
1113         dev->ib_dev.dealloc_pd           = mthca_dealloc_pd;
1114         dev->ib_dev.create_ah            = mthca_ah_create;
1115         dev->ib_dev.destroy_ah           = mthca_ah_destroy;
1116
1117         if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1118                 dev->ib_dev.create_srq           = mthca_create_srq;
1119                 dev->ib_dev.modify_srq           = mthca_modify_srq;
1120                 dev->ib_dev.destroy_srq          = mthca_destroy_srq;
1121
1122                 if (mthca_is_memfree(dev))
1123                         dev->ib_dev.post_srq_recv = mthca_arbel_post_srq_recv;
1124                 else
1125                         dev->ib_dev.post_srq_recv = mthca_tavor_post_srq_recv;
1126         }
1127
1128         dev->ib_dev.create_qp            = mthca_create_qp;
1129         dev->ib_dev.modify_qp            = mthca_modify_qp;
1130         dev->ib_dev.destroy_qp           = mthca_destroy_qp;
1131         dev->ib_dev.create_cq            = mthca_create_cq;
1132         dev->ib_dev.destroy_cq           = mthca_destroy_cq;
1133         dev->ib_dev.poll_cq              = mthca_poll_cq;
1134         dev->ib_dev.get_dma_mr           = mthca_get_dma_mr;
1135         dev->ib_dev.reg_phys_mr          = mthca_reg_phys_mr;
1136         dev->ib_dev.reg_user_mr          = mthca_reg_user_mr;
1137         dev->ib_dev.dereg_mr             = mthca_dereg_mr;
1138
1139         if (dev->mthca_flags & MTHCA_FLAG_FMR) {
1140                 dev->ib_dev.alloc_fmr            = mthca_alloc_fmr;
1141                 dev->ib_dev.unmap_fmr            = mthca_unmap_fmr;
1142                 dev->ib_dev.dealloc_fmr          = mthca_dealloc_fmr;
1143                 if (mthca_is_memfree(dev))
1144                         dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
1145                 else
1146                         dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
1147         }
1148
1149         dev->ib_dev.attach_mcast         = mthca_multicast_attach;
1150         dev->ib_dev.detach_mcast         = mthca_multicast_detach;
1151         dev->ib_dev.process_mad          = mthca_process_mad;
1152
1153         if (mthca_is_memfree(dev)) {
1154                 dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
1155                 dev->ib_dev.post_send     = mthca_arbel_post_send;
1156                 dev->ib_dev.post_recv     = mthca_arbel_post_receive;
1157         } else {
1158                 dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
1159                 dev->ib_dev.post_send     = mthca_tavor_post_send;
1160                 dev->ib_dev.post_recv     = mthca_tavor_post_receive;
1161         }
1162
1163         init_MUTEX(&dev->cap_mask_mutex);
1164
1165         ret = ib_register_device(&dev->ib_dev);
1166         if (ret)
1167                 return ret;
1168
1169         for (i = 0; i < ARRAY_SIZE(mthca_class_attributes); ++i) {
1170                 ret = class_device_create_file(&dev->ib_dev.class_dev,
1171                                                mthca_class_attributes[i]);
1172                 if (ret) {
1173                         ib_unregister_device(&dev->ib_dev);
1174                         return ret;
1175                 }
1176         }
1177
1178         mthca_start_catas_poll(dev);
1179
1180         return 0;
1181 }
1182
1183 void mthca_unregister_device(struct mthca_dev *dev)
1184 {
1185         mthca_stop_catas_poll(dev);
1186         ib_unregister_device(&dev->ib_dev);
1187 }