err.no Git - linux-2.6/blob - 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, 2006 Cisco Systems.  All rights reserved.
   5  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   6  * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
   7  *
   8  * This software is available to you under a choice of one of two
   9  * licenses.  You may choose to be licensed under the terms of the GNU
  10  * General Public License (GPL) Version 2, available from the file
  11  * COPYING in the main directory of this source tree, or the
  12  * OpenIB.org BSD license below:
  13  *
  14  *     Redistribution and use in source and binary forms, with or
  15  *     without modification, are permitted provided that the following
  16  *     conditions are met:
  17  *
  18  *      - Redistributions of source code must retain the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer.
  21  *
  22  *      - Redistributions in binary form must reproduce the above
  23  *        copyright notice, this list of conditions and the following
  24  *        disclaimer in the documentation and/or other materials
  25  *        provided with the distribution.
  26  *
  27  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  31  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  32  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  33  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  34  * SOFTWARE.
  35  *
  36  * $Id: mthca_provider.c 4859 2006-01-09 21:55:10Z roland $
  37  */
  38
  39 #include <rdma/ib_smi.h>
  40 #include <rdma/ib_umem.h>
  41 #include <rdma/ib_user_verbs.h>
  42 #include <linux/mm.h>
  43
  44 #include "mthca_dev.h"
  45 #include "mthca_cmd.h"
  46 #include "mthca_user.h"
  47 #include "mthca_memfree.h"
  48
  49 static void init_query_mad(struct ib_smp *mad)
  50 {
  51         mad->base_version  = 1;
  52         mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
  53         mad->class_version = 1;
  54         mad->method        = IB_MGMT_METHOD_GET;
  55 }
  56
  57 static int mthca_query_device(struct ib_device *ibdev,
  58                               struct ib_device_attr *props)
  59 {
  60         struct ib_smp *in_mad  = NULL;
  61         struct ib_smp *out_mad = NULL;
  62         int err = -ENOMEM;
  63         struct mthca_dev *mdev = to_mdev(ibdev);
  64
  65         u8 status;
  66
  67         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
  68         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
  69         if (!in_mad || !out_mad)
  70                 goto out;
  71
  72         memset(props, 0, sizeof *props);
  73
  74         props->fw_ver              = mdev->fw_ver;
  75
  76         init_query_mad(in_mad);
  77         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
  78
  79         err = mthca_MAD_IFC(mdev, 1, 1,
  80                             1, NULL, NULL, in_mad, out_mad,
  81                             &status);
  82         if (err)
  83                 goto out;
  84         if (status) {
  85                 err = -EINVAL;
  86                 goto out;
  87         }
  88
  89         props->device_cap_flags    = mdev->device_cap_flags;
  90         props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
  91                 0xffffff;
  92         props->vendor_part_id      = be16_to_cpup((__be16 *) (out_mad->data + 30));
  93         props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
  94         memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
  95
  96         props->max_mr_size         = ~0ull;
  97         props->page_size_cap       = mdev->limits.page_size_cap;
  98         props->max_qp              = mdev->limits.num_qps - mdev->limits.reserved_qps;
  99         props->max_qp_wr           = mdev->limits.max_wqes;
 100         props->max_sge             = mdev->limits.max_sg;
 101         props->max_cq              = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
 102         props->max_cqe             = mdev->limits.max_cqes;
 103         props->max_mr              = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
 104         props->max_pd              = mdev->limits.num_pds - mdev->limits.reserved_pds;
 105         props->max_qp_rd_atom      = 1 << mdev->qp_table.rdb_shift;
 106         props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma;
 107         props->max_res_rd_atom     = props->max_qp_rd_atom * props->max_qp;
 108         props->max_srq             = mdev->limits.num_srqs - mdev->limits.reserved_srqs;
 109         props->max_srq_wr          = mdev->limits.max_srq_wqes;
 110         props->max_srq_sge         = mdev->limits.max_srq_sge;
 111         props->local_ca_ack_delay  = mdev->limits.local_ca_ack_delay;
 112         props->atomic_cap          = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
 113                                         IB_ATOMIC_HCA : IB_ATOMIC_NONE;
 114         props->max_pkeys           = mdev->limits.pkey_table_len;
 115         props->max_mcast_grp       = mdev->limits.num_mgms + mdev->limits.num_amgms;
 116         props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
 117         props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 118                                            props->max_mcast_grp;
 119         /*
 120          * If Sinai memory key optimization is being used, then only
 121          * the 8-bit key portion will change.  For other HCAs, the
 122          * unused index bits will also be used for FMR remapping.
 123          */
 124         if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
 125                 props->max_map_per_fmr = 255;
 126         else
 127                 props->max_map_per_fmr =
 128                         (1 << (32 - ilog2(mdev->limits.num_mpts))) - 1;
 129
 130         err = 0;
 131  out:
 132         kfree(in_mad);
 133         kfree(out_mad);
 134         return err;
 135 }
 136
 137 static int mthca_query_port(struct ib_device *ibdev,
 138                             u8 port, struct ib_port_attr *props)
 139 {
 140         struct ib_smp *in_mad  = NULL;
 141         struct ib_smp *out_mad = NULL;
 142         int err = -ENOMEM;
 143         u8 status;
 144
 145         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 146         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 147         if (!in_mad || !out_mad)
 148                 goto out;
 149
 150         memset(props, 0, sizeof *props);
 151
 152         init_query_mad(in_mad);
 153         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 154         in_mad->attr_mod = cpu_to_be32(port);
 155
 156         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 157                             port, NULL, NULL, in_mad, out_mad,
 158                             &status);
 159         if (err)
 160                 goto out;
 161         if (status) {
 162                 err = -EINVAL;
 163                 goto out;
 164         }
 165
 166         props->lid               = be16_to_cpup((__be16 *) (out_mad->data + 16));
 167         props->lmc               = out_mad->data[34] & 0x7;
 168         props->sm_lid            = be16_to_cpup((__be16 *) (out_mad->data + 18));
 169         props->sm_sl             = out_mad->data[36] & 0xf;
 170         props->state             = out_mad->data[32] & 0xf;
 171         props->phys_state        = out_mad->data[33] >> 4;
 172         props->port_cap_flags    = be32_to_cpup((__be32 *) (out_mad->data + 20));
 173         props->gid_tbl_len       = to_mdev(ibdev)->limits.gid_table_len;
 174         props->max_msg_sz        = 0x80000000;
 175         props->pkey_tbl_len      = to_mdev(ibdev)->limits.pkey_table_len;
 176         props->bad_pkey_cntr     = be16_to_cpup((__be16 *) (out_mad->data + 46));
 177         props->qkey_viol_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 48));
 178         props->active_width      = out_mad->data[31] & 0xf;
 179         props->active_speed      = out_mad->data[35] >> 4;
 180         props->max_mtu           = out_mad->data[41] & 0xf;
 181         props->active_mtu        = out_mad->data[36] >> 4;
 182         props->subnet_timeout    = out_mad->data[51] & 0x1f;
 183         props->max_vl_num        = out_mad->data[37] >> 4;
 184         props->init_type_reply   = out_mad->data[41] >> 4;
 185
 186  out:
 187         kfree(in_mad);
 188         kfree(out_mad);
 189         return err;
 190 }
 191
 192 static int mthca_modify_device(struct ib_device *ibdev,
 193                                int mask,
 194                                struct ib_device_modify *props)
 195 {
 196         if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
 197                 return -EOPNOTSUPP;
 198
 199         if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
 200                 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 201                         return -ERESTARTSYS;
 202                 memcpy(ibdev->node_desc, props->node_desc, 64);
 203                 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
 204         }
 205
 206         return 0;
 207 }
 208
 209 static int mthca_modify_port(struct ib_device *ibdev,
 210                              u8 port, int port_modify_mask,
 211                              struct ib_port_modify *props)
 212 {
 213         struct mthca_set_ib_param set_ib;
 214         struct ib_port_attr attr;
 215         int err;
 216         u8 status;
 217
 218         if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 219                 return -ERESTARTSYS;
 220
 221         err = mthca_query_port(ibdev, port, &attr);
 222         if (err)
 223                 goto out;
 224
 225         set_ib.set_si_guid     = 0;
 226         set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
 227
 228         set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
 229                 ~props->clr_port_cap_mask;
 230
 231         err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port, &status);
 232         if (err)
 233                 goto out;
 234         if (status) {
 235                 err = -EINVAL;
 236                 goto out;
 237         }
 238
 239 out:
 240         mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
 241         return err;
 242 }
 243
 244 static int mthca_query_pkey(struct ib_device *ibdev,
 245                             u8 port, u16 index, u16 *pkey)
 246 {
 247         struct ib_smp *in_mad  = NULL;
 248         struct ib_smp *out_mad = NULL;
 249         int err = -ENOMEM;
 250         u8 status;
 251
 252         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 253         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 254         if (!in_mad || !out_mad)
 255                 goto out;
 256
 257         init_query_mad(in_mad);
 258         in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
 259         in_mad->attr_mod = cpu_to_be32(index / 32);
 260
 261         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 262                             port, NULL, NULL, in_mad, out_mad,
 263                             &status);
 264         if (err)
 265                 goto out;
 266         if (status) {
 267                 err = -EINVAL;
 268                 goto out;
 269         }
 270
 271         *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
 272
 273  out:
 274         kfree(in_mad);
 275         kfree(out_mad);
 276         return err;
 277 }
 278
 279 static int mthca_query_gid(struct ib_device *ibdev, u8 port,
 280                            int index, union ib_gid *gid)
 281 {
 282         struct ib_smp *in_mad  = NULL;
 283         struct ib_smp *out_mad = NULL;
 284         int err = -ENOMEM;
 285         u8 status;
 286
 287         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 288         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 289         if (!in_mad || !out_mad)
 290                 goto out;
 291
 292         init_query_mad(in_mad);
 293         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 294         in_mad->attr_mod = cpu_to_be32(port);
 295
 296         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 297                             port, NULL, NULL, in_mad, out_mad,
 298                             &status);
 299         if (err)
 300                 goto out;
 301         if (status) {
 302                 err = -EINVAL;
 303                 goto out;
 304         }
 305
 306         memcpy(gid->raw, out_mad->data + 8, 8);
 307
 308         init_query_mad(in_mad);
 309         in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
 310         in_mad->attr_mod = cpu_to_be32(index / 8);
 311
 312         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 313                             port, NULL, NULL, in_mad, out_mad,
 314                             &status);
 315         if (err)
 316                 goto out;
 317         if (status) {
 318                 err = -EINVAL;
 319                 goto out;
 320         }
 321
 322         memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
 323
 324  out:
 325         kfree(in_mad);
 326         kfree(out_mad);
 327         return err;
 328 }
 329
 330 static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
 331                                                 struct ib_udata *udata)
 332 {
 333         struct mthca_alloc_ucontext_resp uresp;
 334         struct mthca_ucontext           *context;
 335         int                              err;
 336
 337         memset(&uresp, 0, sizeof uresp);
 338
 339         uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
 340         if (mthca_is_memfree(to_mdev(ibdev)))
 341                 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
 342         else
 343                 uresp.uarc_size = 0;
 344
 345         context = kmalloc(sizeof *context, GFP_KERNEL);
 346         if (!context)
 347                 return ERR_PTR(-ENOMEM);
 348
 349         err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
 350         if (err) {
 351                 kfree(context);
 352                 return ERR_PTR(err);
 353         }
 354
 355         context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
 356         if (IS_ERR(context->db_tab)) {
 357                 err = PTR_ERR(context->db_tab);
 358                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 359                 kfree(context);
 360                 return ERR_PTR(err);
 361         }
 362
 363         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 364                 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
 365                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 366                 kfree(context);
 367                 return ERR_PTR(-EFAULT);
 368         }
 369
 370         return &context->ibucontext;
 371 }
 372
 373 static int mthca_dealloc_ucontext(struct ib_ucontext *context)
 374 {
 375         mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
 376                                   to_mucontext(context)->db_tab);
 377         mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
 378         kfree(to_mucontext(context));
 379
 380         return 0;
 381 }
 382
 383 static int mthca_mmap_uar(struct ib_ucontext *context,
 384                           struct vm_area_struct *vma)
 385 {
 386         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
 387                 return -EINVAL;
 388
 389         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 390
 391         if (io_remap_pfn_range(vma, vma->vm_start,
 392                                to_mucontext(context)->uar.pfn,
 393                                PAGE_SIZE, vma->vm_page_prot))
 394                 return -EAGAIN;
 395
 396         return 0;
 397 }
 398
 399 static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
 400                                     struct ib_ucontext *context,
 401                                     struct ib_udata *udata)
 402 {
 403         struct mthca_pd *pd;
 404         int err;
 405
 406         pd = kmalloc(sizeof *pd, GFP_KERNEL);
 407         if (!pd)
 408                 return ERR_PTR(-ENOMEM);
 409
 410         err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
 411         if (err) {
 412                 kfree(pd);
 413                 return ERR_PTR(err);
 414         }
 415
 416         if (context) {
 417                 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
 418                         mthca_pd_free(to_mdev(ibdev), pd);
 419                         kfree(pd);
 420                         return ERR_PTR(-EFAULT);
 421                 }
 422         }
 423
 424         return &pd->ibpd;
 425 }
 426
 427 static int mthca_dealloc_pd(struct ib_pd *pd)
 428 {
 429         mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
 430         kfree(pd);
 431
 432         return 0;
 433 }
 434
 435 static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
 436                                      struct ib_ah_attr *ah_attr)
 437 {
 438         int err;
 439         struct mthca_ah *ah;
 440
 441         ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 442         if (!ah)
 443                 return ERR_PTR(-ENOMEM);
 444
 445         err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
 446         if (err) {
 447                 kfree(ah);
 448                 return ERR_PTR(err);
 449         }
 450
 451         return &ah->ibah;
 452 }
 453
 454 static int mthca_ah_destroy(struct ib_ah *ah)
 455 {
 456         mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
 457         kfree(ah);
 458
 459         return 0;
 460 }
 461
 462 static struct ib_srq *mthca_create_srq(struct ib_pd *pd,
 463                                        struct ib_srq_init_attr *init_attr,
 464                                        struct ib_udata *udata)
 465 {
 466         struct mthca_create_srq ucmd;
 467         struct mthca_ucontext *context = NULL;
 468         struct mthca_srq *srq;
 469         int err;
 470
 471         srq = kmalloc(sizeof *srq, GFP_KERNEL);
 472         if (!srq)
 473                 return ERR_PTR(-ENOMEM);
 474
 475         if (pd->uobject) {
 476                 context = to_mucontext(pd->uobject->context);
 477
 478                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 479                         err = -EFAULT;
 480                         goto err_free;
 481                 }
 482
 483                 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 484                                         context->db_tab, ucmd.db_index,
 485                                         ucmd.db_page);
 486
 487                 if (err)
 488                         goto err_free;
 489
 490                 srq->mr.ibmr.lkey = ucmd.lkey;
 491                 srq->db_index     = ucmd.db_index;
 492         }
 493
 494         err = mthca_alloc_srq(to_mdev(pd->device), to_mpd(pd),
 495                               &init_attr->attr, srq);
 496
 497         if (err && pd->uobject)
 498                 mthca_unmap_user_db(to_mdev(pd->device), &context->uar,
 499                                     context->db_tab, ucmd.db_index);
 500
 501         if (err)
 502                 goto err_free;
 503
 504         if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof (__u32))) {
 505                 mthca_free_srq(to_mdev(pd->device), srq);
 506                 err = -EFAULT;
 507                 goto err_free;
 508         }
 509
 510         return &srq->ibsrq;
 511
 512 err_free:
 513         kfree(srq);
 514
 515         return ERR_PTR(err);
 516 }
 517
 518 static int mthca_destroy_srq(struct ib_srq *srq)
 519 {
 520         struct mthca_ucontext *context;
 521
 522         if (srq->uobject) {
 523                 context = to_mucontext(srq->uobject->context);
 524
 525                 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
 526                                     context->db_tab, to_msrq(srq)->db_index);
 527         }
 528
 529         mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
 530         kfree(srq);
 531
 532         return 0;
 533 }
 534
 535 static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
 536                                      struct ib_qp_init_attr *init_attr,
 537                                      struct ib_udata *udata)
 538 {
 539         struct mthca_create_qp ucmd;
 540         struct mthca_qp *qp;
 541         int err;
 542
 543         if (init_attr->create_flags)
 544                 return ERR_PTR(-EINVAL);
 545
 546         switch (init_attr->qp_type) {
 547         case IB_QPT_RC:
 548         case IB_QPT_UC:
 549         case IB_QPT_UD:
 550         {
 551                 struct mthca_ucontext *context;
 552
 553                 qp = kmalloc(sizeof *qp, GFP_KERNEL);
 554                 if (!qp)
 555                         return ERR_PTR(-ENOMEM);
 556
 557                 if (pd->uobject) {
 558                         context = to_mucontext(pd->uobject->context);
 559
 560                         if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 561                                 kfree(qp);
 562                                 return ERR_PTR(-EFAULT);
 563                         }
 564
 565                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 566                                                 context->db_tab,
 567                                                 ucmd.sq_db_index, ucmd.sq_db_page);
 568                         if (err) {
 569                                 kfree(qp);
 570                                 return ERR_PTR(err);
 571                         }
 572
 573                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 574                                                 context->db_tab,
 575                                                 ucmd.rq_db_index, ucmd.rq_db_page);
 576                         if (err) {
 577                                 mthca_unmap_user_db(to_mdev(pd->device),
 578                                                     &context->uar,
 579                                                     context->db_tab,
 580                                                     ucmd.sq_db_index);
 581                                 kfree(qp);
 582                                 return ERR_PTR(err);
 583                         }
 584
 585                         qp->mr.ibmr.lkey = ucmd.lkey;
 586                         qp->sq.db_index  = ucmd.sq_db_index;
 587                         qp->rq.db_index  = ucmd.rq_db_index;
 588                 }
 589
 590                 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
 591                                      to_mcq(init_attr->send_cq),
 592                                      to_mcq(init_attr->recv_cq),
 593                                      init_attr->qp_type, init_attr->sq_sig_type,
 594                                      &init_attr->cap, qp);
 595
 596                 if (err && pd->uobject) {
 597                         context = to_mucontext(pd->uobject->context);
 598
 599                         mthca_unmap_user_db(to_mdev(pd->device),
 600                                             &context->uar,
 601                                             context->db_tab,
 602                                             ucmd.sq_db_index);
 603                         mthca_unmap_user_db(to_mdev(pd->device),
 604                                             &context->uar,
 605                                             context->db_tab,
 606                                             ucmd.rq_db_index);
 607                 }
 608
 609                 qp->ibqp.qp_num = qp->qpn;
 610                 break;
 611         }
 612         case IB_QPT_SMI:
 613         case IB_QPT_GSI:
 614         {
 615                 /* Don't allow userspace to create special QPs */
 616                 if (pd->uobject)
 617                         return ERR_PTR(-EINVAL);
 618
 619                 qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
 620                 if (!qp)
 621                         return ERR_PTR(-ENOMEM);
 622
 623                 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
 624
 625                 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
 626                                       to_mcq(init_attr->send_cq),
 627                                       to_mcq(init_attr->recv_cq),
 628                                       init_attr->sq_sig_type, &init_attr->cap,
 629                                       qp->ibqp.qp_num, init_attr->port_num,
 630                                       to_msqp(qp));
 631                 break;
 632         }
 633         default:
 634                 /* Don't support raw QPs */
 635                 return ERR_PTR(-ENOSYS);
 636         }
 637
 638         if (err) {
 639                 kfree(qp);
 640                 return ERR_PTR(err);
 641         }
 642
 643         init_attr->cap.max_send_wr     = qp->sq.max;
 644         init_attr->cap.max_recv_wr     = qp->rq.max;
 645         init_attr->cap.max_send_sge    = qp->sq.max_gs;
 646         init_attr->cap.max_recv_sge    = qp->rq.max_gs;
 647         init_attr->cap.max_inline_data = qp->max_inline_data;
 648
 649         return &qp->ibqp;
 650 }
 651
 652 static int mthca_destroy_qp(struct ib_qp *qp)
 653 {
 654         if (qp->uobject) {
 655                 mthca_unmap_user_db(to_mdev(qp->device),
 656                                     &to_mucontext(qp->uobject->context)->uar,
 657                                     to_mucontext(qp->uobject->context)->db_tab,
 658                                     to_mqp(qp)->sq.db_index);
 659                 mthca_unmap_user_db(to_mdev(qp->device),
 660                                     &to_mucontext(qp->uobject->context)->uar,
 661                                     to_mucontext(qp->uobject->context)->db_tab,
 662                                     to_mqp(qp)->rq.db_index);
 663         }
 664         mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
 665         kfree(qp);
 666         return 0;
 667 }
 668
 669 static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
 670                                      int comp_vector,
 671                                      struct ib_ucontext *context,
 672                                      struct ib_udata *udata)
 673 {
 674         struct mthca_create_cq ucmd;
 675         struct mthca_cq *cq;
 676         int nent;
 677         int err;
 678
 679         if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
 680                 return ERR_PTR(-EINVAL);
 681
 682         if (context) {
 683                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 684                         return ERR_PTR(-EFAULT);
 685
 686                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 687                                         to_mucontext(context)->db_tab,
 688                                         ucmd.set_db_index, ucmd.set_db_page);
 689                 if (err)
 690                         return ERR_PTR(err);
 691
 692                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 693                                         to_mucontext(context)->db_tab,
 694                                         ucmd.arm_db_index, ucmd.arm_db_page);
 695                 if (err)
 696                         goto err_unmap_set;
 697         }
 698
 699         cq = kmalloc(sizeof *cq, GFP_KERNEL);
 700         if (!cq) {
 701                 err = -ENOMEM;
 702                 goto err_unmap_arm;
 703         }
 704
 705         if (context) {
 706                 cq->buf.mr.ibmr.lkey = ucmd.lkey;
 707                 cq->set_ci_db_index  = ucmd.set_db_index;
 708                 cq->arm_db_index     = ucmd.arm_db_index;
 709         }
 710
 711         for (nent = 1; nent <= entries; nent <<= 1)
 712                 ; /* nothing */
 713
 714         err = mthca_init_cq(to_mdev(ibdev), nent,
 715                             context ? to_mucontext(context) : NULL,
 716                             context ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
 717                             cq);
 718         if (err)
 719                 goto err_free;
 720
 721         if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
 722                 mthca_free_cq(to_mdev(ibdev), cq);
 723                 goto err_free;
 724         }
 725
 726         cq->resize_buf = NULL;
 727
 728         return &cq->ibcq;
 729
 730 err_free:
 731         kfree(cq);
 732
 733 err_unmap_arm:
 734         if (context)
 735                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 736                                     to_mucontext(context)->db_tab, ucmd.arm_db_index);
 737
 738 err_unmap_set:
 739         if (context)
 740                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 741                                     to_mucontext(context)->db_tab, ucmd.set_db_index);
 742
 743         return ERR_PTR(err);
 744 }
 745
 746 static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,
 747                                   int entries)
 748 {
 749         int ret;
 750
 751         spin_lock_irq(&cq->lock);
 752         if (cq->resize_buf) {
 753                 ret = -EBUSY;
 754                 goto unlock;
 755         }
 756
 757         cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
 758         if (!cq->resize_buf) {
 759                 ret = -ENOMEM;
 760                 goto unlock;
 761         }
 762
 763         cq->resize_buf->state = CQ_RESIZE_ALLOC;
 764
 765         ret = 0;
 766
 767 unlock:
 768         spin_unlock_irq(&cq->lock);
 769
 770         if (ret)
 771                 return ret;
 772
 773         ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
 774         if (ret) {
 775                 spin_lock_irq(&cq->lock);
 776                 kfree(cq->resize_buf);
 777                 cq->resize_buf = NULL;
 778                 spin_unlock_irq(&cq->lock);
 779                 return ret;
 780         }
 781
 782         cq->resize_buf->cqe = entries - 1;
 783
 784         spin_lock_irq(&cq->lock);
 785         cq->resize_buf->state = CQ_RESIZE_READY;
 786         spin_unlock_irq(&cq->lock);
 787
 788         return 0;
 789 }
 790
 791 static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
 792 {
 793         struct mthca_dev *dev = to_mdev(ibcq->device);
 794         struct mthca_cq *cq = to_mcq(ibcq);
 795         struct mthca_resize_cq ucmd;
 796         u32 lkey;
 797         u8 status;
 798         int ret;
 799
 800         if (entries < 1 || entries > dev->limits.max_cqes)
 801                 return -EINVAL;
 802
 803         mutex_lock(&cq->mutex);
 804
 805         entries = roundup_pow_of_two(entries + 1);
 806         if (entries == ibcq->cqe + 1) {
 807                 ret = 0;
 808                 goto out;
 809         }
 810
 811         if (cq->is_kernel) {
 812                 ret = mthca_alloc_resize_buf(dev, cq, entries);
 813                 if (ret)
 814                         goto out;
 815                 lkey = cq->resize_buf->buf.mr.ibmr.lkey;
 816         } else {
 817                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 818                         ret = -EFAULT;
 819                         goto out;
 820                 }
 821                 lkey = ucmd.lkey;
 822         }
 823
 824         ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries), &status);
 825         if (status)
 826                 ret = -EINVAL;
 827
 828         if (ret) {
 829                 if (cq->resize_buf) {
 830                         mthca_free_cq_buf(dev, &cq->resize_buf->buf,
 831                                           cq->resize_buf->cqe);
 832                         kfree(cq->resize_buf);
 833                         spin_lock_irq(&cq->lock);
 834                         cq->resize_buf = NULL;
 835                         spin_unlock_irq(&cq->lock);
 836                 }
 837                 goto out;
 838         }
 839
 840         if (cq->is_kernel) {
 841                 struct mthca_cq_buf tbuf;
 842                 int tcqe;
 843
 844                 spin_lock_irq(&cq->lock);
 845                 if (cq->resize_buf->state == CQ_RESIZE_READY) {
 846                         mthca_cq_resize_copy_cqes(cq);
 847                         tbuf         = cq->buf;
 848                         tcqe         = cq->ibcq.cqe;
 849                         cq->buf      = cq->resize_buf->buf;
 850                         cq->ibcq.cqe = cq->resize_buf->cqe;
 851                 } else {
 852                         tbuf = cq->resize_buf->buf;
 853                         tcqe = cq->resize_buf->cqe;
 854                 }
 855
 856                 kfree(cq->resize_buf);
 857                 cq->resize_buf = NULL;
 858                 spin_unlock_irq(&cq->lock);
 859
 860                 mthca_free_cq_buf(dev, &tbuf, tcqe);
 861         } else
 862                 ibcq->cqe = entries - 1;
 863
 864 out:
 865         mutex_unlock(&cq->mutex);
 866
 867         return ret;
 868 }
 869
 870 static int mthca_destroy_cq(struct ib_cq *cq)
 871 {
 872         if (cq->uobject) {
 873                 mthca_unmap_user_db(to_mdev(cq->device),
 874                                     &to_mucontext(cq->uobject->context)->uar,
 875                                     to_mucontext(cq->uobject->context)->db_tab,
 876                                     to_mcq(cq)->arm_db_index);
 877                 mthca_unmap_user_db(to_mdev(cq->device),
 878                                     &to_mucontext(cq->uobject->context)->uar,
 879                                     to_mucontext(cq->uobject->context)->db_tab,
 880                                     to_mcq(cq)->set_ci_db_index);
 881         }
 882         mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
 883         kfree(cq);
 884
 885         return 0;
 886 }
 887
 888 static inline u32 convert_access(int acc)
 889 {
 890         return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC       : 0) |
 891                (acc & IB_ACCESS_REMOTE_WRITE  ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
 892                (acc & IB_ACCESS_REMOTE_READ   ? MTHCA_MPT_FLAG_REMOTE_READ  : 0) |
 893                (acc & IB_ACCESS_LOCAL_WRITE   ? MTHCA_MPT_FLAG_LOCAL_WRITE  : 0) |
 894                MTHCA_MPT_FLAG_LOCAL_READ;
 895 }
 896
 897 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
 898 {
 899         struct mthca_mr *mr;
 900         int err;
 901
 902         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 903         if (!mr)
 904                 return ERR_PTR(-ENOMEM);
 905
 906         err = mthca_mr_alloc_notrans(to_mdev(pd->device),
 907                                      to_mpd(pd)->pd_num,
 908                                      convert_access(acc), mr);
 909
 910         if (err) {
 911                 kfree(mr);
 912                 return ERR_PTR(err);
 913         }
 914
 915         mr->umem = NULL;
 916
 917         return &mr->ibmr;
 918 }
 919
 920 static struct ib_mr *mthca_reg_phys_mr(struct ib_pd       *pd,
 921                                        struct ib_phys_buf *buffer_list,
 922                                        int                 num_phys_buf,
 923                                        int                 acc,
 924                                        u64                *iova_start)
 925 {
 926         struct mthca_mr *mr;
 927         u64 *page_list;
 928         u64 total_size;
 929         unsigned long mask;
 930         int shift;
 931         int npages;
 932         int err;
 933         int i, j, n;
 934
 935         mask = buffer_list[0].addr ^ *iova_start;
 936         total_size = 0;
 937         for (i = 0; i < num_phys_buf; ++i) {
 938                 if (i != 0)
 939                         mask |= buffer_list[i].addr;
 940                 if (i != num_phys_buf - 1)
 941                         mask |= buffer_list[i].addr + buffer_list[i].size;
 942
 943                 total_size += buffer_list[i].size;
 944         }
 945
 946         if (mask & ~PAGE_MASK)
 947                 return ERR_PTR(-EINVAL);
 948
 949         shift = __ffs(mask | 1 << 31);
 950
 951         buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
 952         buffer_list[0].addr &= ~0ull << shift;
 953
 954         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 955         if (!mr)
 956                 return ERR_PTR(-ENOMEM);
 957
 958         npages = 0;
 959         for (i = 0; i < num_phys_buf; ++i)
 960                 npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 961
 962         if (!npages)
 963                 return &mr->ibmr;
 964
 965         page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
 966         if (!page_list) {
 967                 kfree(mr);
 968                 return ERR_PTR(-ENOMEM);
 969         }
 970
 971         n = 0;
 972         for (i = 0; i < num_phys_buf; ++i)
 973                 for (j = 0;
 974                      j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 975                      ++j)
 976                         page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
 977
 978         mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
 979                   "in PD %x; shift %d, npages %d.\n",
 980                   (unsigned long long) buffer_list[0].addr,
 981                   (unsigned long long) *iova_start,
 982                   to_mpd(pd)->pd_num,
 983                   shift, npages);
 984
 985         err = mthca_mr_alloc_phys(to_mdev(pd->device),
 986                                   to_mpd(pd)->pd_num,
 987                                   page_list, shift, npages,
 988                                   *iova_start, total_size,
 989                                   convert_access(acc), mr);
 990
 991         if (err) {
 992                 kfree(page_list);
 993                 kfree(mr);
 994                 return ERR_PTR(err);
 995         }
 996
 997         kfree(page_list);
 998         mr->umem = NULL;
 999
1000         return &mr->ibmr;
1001 }
1002
1003 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
1004                                        u64 virt, int acc, struct ib_udata *udata)
1005 {
1006         struct mthca_dev *dev = to_mdev(pd->device);
1007         struct ib_umem_chunk *chunk;
1008         struct mthca_mr *mr;
1009         u64 *pages;
1010         int shift, n, len;
1011         int i, j, k;
1012         int err = 0;
1013         int write_mtt_size;
1014
1015         mr = kmalloc(sizeof *mr, GFP_KERNEL);
1016         if (!mr)
1017                 return ERR_PTR(-ENOMEM);
1018
1019         mr->umem = ib_umem_get(pd->uobject->context, start, length, acc);
1020         if (IS_ERR(mr->umem)) {
1021                 err = PTR_ERR(mr->umem);
1022                 goto err;
1023         }
1024
1025         shift = ffs(mr->umem->page_size) - 1;
1026
1027         n = 0;
1028         list_for_each_entry(chunk, &mr->umem->chunk_list, list)
1029                 n += chunk->nents;
1030
1031         mr->mtt = mthca_alloc_mtt(dev, n);
1032         if (IS_ERR(mr->mtt)) {
1033                 err = PTR_ERR(mr->mtt);
1034                 goto err_umem;
1035         }
1036
1037         pages = (u64 *) __get_free_page(GFP_KERNEL);
1038         if (!pages) {
1039                 err = -ENOMEM;
1040                 goto err_mtt;
1041         }
1042
1043         i = n = 0;
1044
1045         write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
1046
1047         list_for_each_entry(chunk, &mr->umem->chunk_list, list)
1048                 for (j = 0; j < chunk->nmap; ++j) {
1049                         len = sg_dma_len(&chunk->page_list[j]) >> shift;
1050                         for (k = 0; k < len; ++k) {
1051                                 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
1052                                         mr->umem->page_size * k;
1053                                 /*
1054                                  * Be friendly to write_mtt and pass it chunks
1055                                  * of appropriate size.
1056                                  */
1057                                 if (i == write_mtt_size) {
1058                                         err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
1059                                         if (err)
1060                                                 goto mtt_done;
1061                                         n += i;
1062                                         i = 0;
1063                                 }
1064                         }
1065                 }
1066
1067         if (i)
1068                 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
1069 mtt_done:
1070         free_page((unsigned long) pages);
1071         if (err)
1072                 goto err_mtt;
1073
1074         err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, virt, length,
1075                              convert_access(acc), mr);
1076
1077         if (err)
1078                 goto err_mtt;
1079
1080         return &mr->ibmr;
1081
1082 err_mtt:
1083         mthca_free_mtt(dev, mr->mtt);
1084
1085 err_umem:
1086         ib_umem_release(mr->umem);
1087
1088 err:
1089         kfree(mr);
1090         return ERR_PTR(err);
1091 }
1092
1093 static int mthca_dereg_mr(struct ib_mr *mr)
1094 {
1095         struct mthca_mr *mmr = to_mmr(mr);
1096
1097         mthca_free_mr(to_mdev(mr->device), mmr);
1098         if (mmr->umem)
1099                 ib_umem_release(mmr->umem);
1100         kfree(mmr);
1101
1102         return 0;
1103 }
1104
1105 static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
1106                                       struct ib_fmr_attr *fmr_attr)
1107 {
1108         struct mthca_fmr *fmr;
1109         int err;
1110
1111         fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
1112         if (!fmr)
1113                 return ERR_PTR(-ENOMEM);
1114
1115         memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
1116         err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
1117                              convert_access(mr_access_flags), fmr);
1118
1119         if (err) {
1120                 kfree(fmr);
1121                 return ERR_PTR(err);
1122         }
1123
1124         return &fmr->ibmr;
1125 }
1126
1127 static int mthca_dealloc_fmr(struct ib_fmr *fmr)
1128 {
1129         struct mthca_fmr *mfmr = to_mfmr(fmr);
1130         int err;
1131
1132         err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
1133         if (err)
1134                 return err;
1135
1136         kfree(mfmr);
1137         return 0;
1138 }
1139
1140 static int mthca_unmap_fmr(struct list_head *fmr_list)
1141 {
1142         struct ib_fmr *fmr;
1143         int err;
1144         u8 status;
1145         struct mthca_dev *mdev = NULL;
1146
1147         list_for_each_entry(fmr, fmr_list, list) {
1148                 if (mdev && to_mdev(fmr->device) != mdev)
1149                         return -EINVAL;
1150                 mdev = to_mdev(fmr->device);
1151         }
1152
1153         if (!mdev)
1154                 return 0;
1155
1156         if (mthca_is_memfree(mdev)) {
1157                 list_for_each_entry(fmr, fmr_list, list)
1158                         mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
1159
1160                 wmb();
1161         } else
1162                 list_for_each_entry(fmr, fmr_list, list)
1163                         mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
1164
1165         err = mthca_SYNC_TPT(mdev, &status);
1166         if (err)
1167                 return err;
1168         if (status)
1169                 return -EINVAL;
1170         return 0;
1171 }
1172
1173 static ssize_t show_rev(struct device *device, struct device_attribute *attr,
1174                         char *buf)
1175 {
1176         struct mthca_dev *dev =
1177                 container_of(device, struct mthca_dev, ib_dev.dev);
1178         return sprintf(buf, "%x\n", dev->rev_id);
1179 }
1180
1181 static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
1182                            char *buf)
1183 {
1184         struct mthca_dev *dev =
1185                 container_of(device, struct mthca_dev, ib_dev.dev);
1186         return sprintf(buf, "%d.%d.%d\n", (int) (dev->fw_ver >> 32),
1187                        (int) (dev->fw_ver >> 16) & 0xffff,
1188                        (int) dev->fw_ver & 0xffff);
1189 }
1190
1191 static ssize_t show_hca(struct device *device, struct device_attribute *attr,
1192                         char *buf)
1193 {
1194         struct mthca_dev *dev =
1195                 container_of(device, struct mthca_dev, ib_dev.dev);
1196         switch (dev->pdev->device) {
1197         case PCI_DEVICE_ID_MELLANOX_TAVOR:
1198                 return sprintf(buf, "MT23108\n");
1199         case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
1200                 return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
1201         case PCI_DEVICE_ID_MELLANOX_ARBEL:
1202                 return sprintf(buf, "MT25208\n");
1203         case PCI_DEVICE_ID_MELLANOX_SINAI:
1204         case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
1205                 return sprintf(buf, "MT25204\n");
1206         default:
1207                 return sprintf(buf, "unknown\n");
1208         }
1209 }
1210
1211 static ssize_t show_board(struct device *device, struct device_attribute *attr,
1212                           char *buf)
1213 {
1214         struct mthca_dev *dev =
1215                 container_of(device, struct mthca_dev, ib_dev.dev);
1216         return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
1217 }
1218
1219 static DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
1220 static DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
1221 static DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
1222 static DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
1223
1224 static struct device_attribute *mthca_dev_attributes[] = {
1225         &dev_attr_hw_rev,
1226         &dev_attr_fw_ver,
1227         &dev_attr_hca_type,
1228         &dev_attr_board_id
1229 };
1230
1231 static int mthca_init_node_data(struct mthca_dev *dev)
1232 {
1233         struct ib_smp *in_mad  = NULL;
1234         struct ib_smp *out_mad = NULL;
1235         int err = -ENOMEM;
1236         u8 status;
1237
1238         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
1239         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1240         if (!in_mad || !out_mad)
1241                 goto out;
1242
1243         init_query_mad(in_mad);
1244         in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
1245
1246         err = mthca_MAD_IFC(dev, 1, 1,
1247                             1, NULL, NULL, in_mad, out_mad,
1248                             &status);
1249         if (err)
1250                 goto out;
1251         if (status) {
1252                 err = -EINVAL;
1253                 goto out;
1254         }
1255
1256         memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
1257
1258         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
1259
1260         err = mthca_MAD_IFC(dev, 1, 1,
1261                             1, NULL, NULL, in_mad, out_mad,
1262                             &status);
1263         if (err)
1264                 goto out;
1265         if (status) {
1266                 err = -EINVAL;
1267                 goto out;
1268         }
1269
1270         if (mthca_is_memfree(dev))
1271                 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
1272         memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
1273
1274 out:
1275         kfree(in_mad);
1276         kfree(out_mad);
1277         return err;
1278 }
1279
1280 int mthca_register_device(struct mthca_dev *dev)
1281 {
1282         int ret;
1283         int i;
1284
1285         ret = mthca_init_node_data(dev);
1286         if (ret)
1287                 return ret;
1288
1289         strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
1290         dev->ib_dev.owner                = THIS_MODULE;
1291
1292         dev->ib_dev.uverbs_abi_ver       = MTHCA_UVERBS_ABI_VERSION;
1293         dev->ib_dev.uverbs_cmd_mask      =
1294                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
1295                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
1296                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
1297                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
1298                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
1299                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
1300                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
1301                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1302                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
1303                 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
1304                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
1305                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
1306                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
1307                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
1308                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
1309                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
1310                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
1311         dev->ib_dev.node_type            = RDMA_NODE_IB_CA;
1312         dev->ib_dev.phys_port_cnt        = dev->limits.num_ports;
1313         dev->ib_dev.num_comp_vectors     = 1;
1314         dev->ib_dev.dma_device           = &dev->pdev->dev;
1315         dev->ib_dev.query_device         = mthca_query_device;
1316         dev->ib_dev.query_port           = mthca_query_port;
1317         dev->ib_dev.modify_device        = mthca_modify_device;
1318         dev->ib_dev.modify_port          = mthca_modify_port;
1319         dev->ib_dev.query_pkey           = mthca_query_pkey;
1320         dev->ib_dev.query_gid            = mthca_query_gid;
1321         dev->ib_dev.alloc_ucontext       = mthca_alloc_ucontext;
1322         dev->ib_dev.dealloc_ucontext     = mthca_dealloc_ucontext;
1323         dev->ib_dev.mmap                 = mthca_mmap_uar;
1324         dev->ib_dev.alloc_pd             = mthca_alloc_pd;
1325         dev->ib_dev.dealloc_pd           = mthca_dealloc_pd;
1326         dev->ib_dev.create_ah            = mthca_ah_create;
1327         dev->ib_dev.query_ah             = mthca_ah_query;
1328         dev->ib_dev.destroy_ah           = mthca_ah_destroy;
1329
1330         if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1331                 dev->ib_dev.create_srq           = mthca_create_srq;
1332                 dev->ib_dev.modify_srq           = mthca_modify_srq;
1333                 dev->ib_dev.query_srq            = mthca_query_srq;
1334                 dev->ib_dev.destroy_srq          = mthca_destroy_srq;
1335                 dev->ib_dev.uverbs_cmd_mask     |=
1336                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
1337                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
1338                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
1339                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
1340
1341                 if (mthca_is_memfree(dev))
1342                         dev->ib_dev.post_srq_recv = mthca_arbel_post_srq_recv;
1343                 else
1344                         dev->ib_dev.post_srq_recv = mthca_tavor_post_srq_recv;
1345         }
1346
1347         dev->ib_dev.create_qp            = mthca_create_qp;
1348         dev->ib_dev.modify_qp            = mthca_modify_qp;
1349         dev->ib_dev.query_qp             = mthca_query_qp;
1350         dev->ib_dev.destroy_qp           = mthca_destroy_qp;
1351         dev->ib_dev.create_cq            = mthca_create_cq;
1352         dev->ib_dev.resize_cq            = mthca_resize_cq;
1353         dev->ib_dev.destroy_cq           = mthca_destroy_cq;
1354         dev->ib_dev.poll_cq              = mthca_poll_cq;
1355         dev->ib_dev.get_dma_mr           = mthca_get_dma_mr;
1356         dev->ib_dev.reg_phys_mr          = mthca_reg_phys_mr;
1357         dev->ib_dev.reg_user_mr          = mthca_reg_user_mr;
1358         dev->ib_dev.dereg_mr             = mthca_dereg_mr;
1359
1360         if (dev->mthca_flags & MTHCA_FLAG_FMR) {
1361                 dev->ib_dev.alloc_fmr            = mthca_alloc_fmr;
1362                 dev->ib_dev.unmap_fmr            = mthca_unmap_fmr;
1363                 dev->ib_dev.dealloc_fmr          = mthca_dealloc_fmr;
1364                 if (mthca_is_memfree(dev))
1365                         dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
1366                 else
1367                         dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
1368         }
1369
1370         dev->ib_dev.attach_mcast         = mthca_multicast_attach;
1371         dev->ib_dev.detach_mcast         = mthca_multicast_detach;
1372         dev->ib_dev.process_mad          = mthca_process_mad;
1373
1374         if (mthca_is_memfree(dev)) {
1375                 dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
1376                 dev->ib_dev.post_send     = mthca_arbel_post_send;
1377                 dev->ib_dev.post_recv     = mthca_arbel_post_receive;
1378         } else {
1379                 dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
1380                 dev->ib_dev.post_send     = mthca_tavor_post_send;
1381                 dev->ib_dev.post_recv     = mthca_tavor_post_receive;
1382         }
1383
1384         mutex_init(&dev->cap_mask_mutex);
1385
1386         ret = ib_register_device(&dev->ib_dev);
1387         if (ret)
1388                 return ret;
1389
1390         for (i = 0; i < ARRAY_SIZE(mthca_dev_attributes); ++i) {
1391                 ret = device_create_file(&dev->ib_dev.dev,
1392                                          mthca_dev_attributes[i]);
1393                 if (ret) {
1394                         ib_unregister_device(&dev->ib_dev);
1395                         return ret;
1396                 }
1397         }
1398
1399         mthca_start_catas_poll(dev);
1400
1401         return 0;
1402 }
1403
1404 void mthca_unregister_device(struct mthca_dev *dev)
1405 {
1406         mthca_stop_catas_poll(dev);
1407         ib_unregister_device(&dev->ib_dev);
1408 }