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