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