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
  37 #include <rdma/ib_smi.h>
  38 #include <rdma/ib_umem.h>
  39 #include <rdma/ib_user_verbs.h>
  40 #include <rdma/uverbs_ioctl.h>
  41
  42 #include <linux/sched.h>
  43 #include <linux/slab.h>
  44 #include <linux/stat.h>
  45 #include <linux/mm.h>
  46 #include <linux/export.h>
  47
  48 #include "mthca_dev.h"
  49 #include "mthca_cmd.h"
  50 #include <rdma/mthca-abi.h>
  51 #include "mthca_memfree.h"
  52
  53 static void init_query_mad(struct ib_smp *mad)
  54 {
  55         mad->base_version  = 1;
  56         mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
  57         mad->class_version = 1;
  58         mad->method        = IB_MGMT_METHOD_GET;
  59 }
  60
  61 static int mthca_query_device(struct ib_device *ibdev, struct ib_device_attr *props,
  62                               struct ib_udata *uhw)
  63 {
  64         struct ib_smp *in_mad  = NULL;
  65         struct ib_smp *out_mad = NULL;
  66         int err = -ENOMEM;
  67         struct mthca_dev *mdev = to_mdev(ibdev);
  68
  69         if (uhw->inlen || uhw->outlen)
  70                 return -EINVAL;
  71
  72         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
  73         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
  74         if (!in_mad || !out_mad)
  75                 goto out;
  76
  77         memset(props, 0, sizeof *props);
  78
  79         props->fw_ver              = mdev->fw_ver;
  80
  81         init_query_mad(in_mad);
  82         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
  83
  84         err = mthca_MAD_IFC(mdev, 1, 1,
  85                             1, NULL, NULL, in_mad, out_mad);
  86         if (err)
  87                 goto out;
  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_send_sge        = mdev->limits.max_sg;
 101         props->max_recv_sge        = mdev->limits.max_sg;
 102         props->max_sge_rd          = mdev->limits.max_sg;
 103         props->max_cq              = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
 104         props->max_cqe             = mdev->limits.max_cqes;
 105         props->max_mr              = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
 106         props->max_pd              = mdev->limits.num_pds - mdev->limits.reserved_pds;
 107         props->max_qp_rd_atom      = 1 << mdev->qp_table.rdb_shift;
 108         props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma;
 109         props->max_res_rd_atom     = props->max_qp_rd_atom * props->max_qp;
 110         props->max_srq             = mdev->limits.num_srqs - mdev->limits.reserved_srqs;
 111         props->max_srq_wr          = mdev->limits.max_srq_wqes;
 112         props->max_srq_sge         = mdev->limits.max_srq_sge;
 113         props->local_ca_ack_delay  = mdev->limits.local_ca_ack_delay;
 114         props->atomic_cap          = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
 115                                         IB_ATOMIC_HCA : IB_ATOMIC_NONE;
 116         props->max_pkeys           = mdev->limits.pkey_table_len;
 117         props->max_mcast_grp       = mdev->limits.num_mgms + mdev->limits.num_amgms;
 118         props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
 119         props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 120                                            props->max_mcast_grp;
 121
 122         err = 0;
 123  out:
 124         kfree(in_mad);
 125         kfree(out_mad);
 126         return err;
 127 }
 128
 129 static int mthca_query_port(struct ib_device *ibdev,
 130                             u8 port, struct ib_port_attr *props)
 131 {
 132         struct ib_smp *in_mad  = NULL;
 133         struct ib_smp *out_mad = NULL;
 134         int err = -ENOMEM;
 135
 136         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 137         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 138         if (!in_mad || !out_mad)
 139                 goto out;
 140
 141         /* props being zeroed by the caller, avoid zeroing it here */
 142
 143         init_query_mad(in_mad);
 144         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 145         in_mad->attr_mod = cpu_to_be32(port);
 146
 147         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 148                             port, NULL, NULL, in_mad, out_mad);
 149         if (err)
 150                 goto out;
 151
 152         props->lid               = be16_to_cpup((__be16 *) (out_mad->data + 16));
 153         props->lmc               = out_mad->data[34] & 0x7;
 154         props->sm_lid            = be16_to_cpup((__be16 *) (out_mad->data + 18));
 155         props->sm_sl             = out_mad->data[36] & 0xf;
 156         props->state             = out_mad->data[32] & 0xf;
 157         props->phys_state        = out_mad->data[33] >> 4;
 158         props->port_cap_flags    = be32_to_cpup((__be32 *) (out_mad->data + 20));
 159         props->gid_tbl_len       = to_mdev(ibdev)->limits.gid_table_len;
 160         props->max_msg_sz        = 0x80000000;
 161         props->pkey_tbl_len      = to_mdev(ibdev)->limits.pkey_table_len;
 162         props->bad_pkey_cntr     = be16_to_cpup((__be16 *) (out_mad->data + 46));
 163         props->qkey_viol_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 48));
 164         props->active_width      = out_mad->data[31] & 0xf;
 165         props->active_speed      = out_mad->data[35] >> 4;
 166         props->max_mtu           = out_mad->data[41] & 0xf;
 167         props->active_mtu        = out_mad->data[36] >> 4;
 168         props->subnet_timeout    = out_mad->data[51] & 0x1f;
 169         props->max_vl_num        = out_mad->data[37] >> 4;
 170         props->init_type_reply   = out_mad->data[41] >> 4;
 171
 172  out:
 173         kfree(in_mad);
 174         kfree(out_mad);
 175         return err;
 176 }
 177
 178 static int mthca_modify_device(struct ib_device *ibdev,
 179                                int mask,
 180                                struct ib_device_modify *props)
 181 {
 182         if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
 183                 return -EOPNOTSUPP;
 184
 185         if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
 186                 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 187                         return -ERESTARTSYS;
 188                 memcpy(ibdev->node_desc, props->node_desc,
 189                        IB_DEVICE_NODE_DESC_MAX);
 190                 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
 191         }
 192
 193         return 0;
 194 }
 195
 196 static int mthca_modify_port(struct ib_device *ibdev,
 197                              u8 port, int port_modify_mask,
 198                              struct ib_port_modify *props)
 199 {
 200         struct mthca_set_ib_param set_ib;
 201         struct ib_port_attr attr;
 202         int err;
 203
 204         if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 205                 return -ERESTARTSYS;
 206
 207         err = ib_query_port(ibdev, port, &attr);
 208         if (err)
 209                 goto out;
 210
 211         set_ib.set_si_guid     = 0;
 212         set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
 213
 214         set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
 215                 ~props->clr_port_cap_mask;
 216
 217         err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port);
 218         if (err)
 219                 goto out;
 220 out:
 221         mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
 222         return err;
 223 }
 224
 225 static int mthca_query_pkey(struct ib_device *ibdev,
 226                             u8 port, u16 index, u16 *pkey)
 227 {
 228         struct ib_smp *in_mad  = NULL;
 229         struct ib_smp *out_mad = NULL;
 230         int err = -ENOMEM;
 231
 232         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 233         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 234         if (!in_mad || !out_mad)
 235                 goto out;
 236
 237         init_query_mad(in_mad);
 238         in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
 239         in_mad->attr_mod = cpu_to_be32(index / 32);
 240
 241         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 242                             port, NULL, NULL, in_mad, out_mad);
 243         if (err)
 244                 goto out;
 245
 246         *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
 247
 248  out:
 249         kfree(in_mad);
 250         kfree(out_mad);
 251         return err;
 252 }
 253
 254 static int mthca_query_gid(struct ib_device *ibdev, u8 port,
 255                            int index, union ib_gid *gid)
 256 {
 257         struct ib_smp *in_mad  = NULL;
 258         struct ib_smp *out_mad = NULL;
 259         int err = -ENOMEM;
 260
 261         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 262         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 263         if (!in_mad || !out_mad)
 264                 goto out;
 265
 266         init_query_mad(in_mad);
 267         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 268         in_mad->attr_mod = cpu_to_be32(port);
 269
 270         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 271                             port, NULL, NULL, in_mad, out_mad);
 272         if (err)
 273                 goto out;
 274
 275         memcpy(gid->raw, out_mad->data + 8, 8);
 276
 277         init_query_mad(in_mad);
 278         in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
 279         in_mad->attr_mod = cpu_to_be32(index / 8);
 280
 281         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 282                             port, NULL, NULL, in_mad, out_mad);
 283         if (err)
 284                 goto out;
 285
 286         memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
 287
 288  out:
 289         kfree(in_mad);
 290         kfree(out_mad);
 291         return err;
 292 }
 293
 294 static int mthca_alloc_ucontext(struct ib_ucontext *uctx,
 295                                 struct ib_udata *udata)
 296 {
 297         struct ib_device *ibdev = uctx->device;
 298         struct mthca_alloc_ucontext_resp uresp = {};
 299         struct mthca_ucontext *context = to_mucontext(uctx);
 300         int                              err;
 301
 302         if (!(to_mdev(ibdev)->active))
 303                 return -EAGAIN;
 304
 305         uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
 306         if (mthca_is_memfree(to_mdev(ibdev)))
 307                 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
 308         else
 309                 uresp.uarc_size = 0;
 310
 311         err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
 312         if (err)
 313                 return err;
 314
 315         context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
 316         if (IS_ERR(context->db_tab)) {
 317                 err = PTR_ERR(context->db_tab);
 318                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 319                 return err;
 320         }
 321
 322         if (ib_copy_to_udata(udata, &uresp, sizeof(uresp))) {
 323                 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
 324                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 325                 return -EFAULT;
 326         }
 327
 328         context->reg_mr_warned = 0;
 329
 330         return 0;
 331 }
 332
 333 static void mthca_dealloc_ucontext(struct ib_ucontext *context)
 334 {
 335         mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
 336                                   to_mucontext(context)->db_tab);
 337         mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
 338 }
 339
 340 static int mthca_mmap_uar(struct ib_ucontext *context,
 341                           struct vm_area_struct *vma)
 342 {
 343         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
 344                 return -EINVAL;
 345
 346         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 347
 348         if (io_remap_pfn_range(vma, vma->vm_start,
 349                                to_mucontext(context)->uar.pfn,
 350                                PAGE_SIZE, vma->vm_page_prot))
 351                 return -EAGAIN;
 352
 353         return 0;
 354 }
 355
 356 static int mthca_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 357 {
 358         struct ib_device *ibdev = ibpd->device;
 359         struct mthca_pd *pd = to_mpd(ibpd);
 360         int err;
 361
 362         err = mthca_pd_alloc(to_mdev(ibdev), !udata, pd);
 363         if (err)
 364                 return err;
 365
 366         if (udata) {
 367                 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
 368                         mthca_pd_free(to_mdev(ibdev), pd);
 369                         return -EFAULT;
 370                 }
 371         }
 372
 373         return 0;
 374 }
 375
 376 static int mthca_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata)
 377 {
 378         mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
 379         return 0;
 380 }
 381
 382 static int mthca_ah_create(struct ib_ah *ibah,
 383                            struct rdma_ah_init_attr *init_attr,
 384                            struct ib_udata *udata)
 385
 386 {
 387         struct mthca_ah *ah = to_mah(ibah);
 388
 389         return mthca_create_ah(to_mdev(ibah->device), to_mpd(ibah->pd),
 390                                init_attr->ah_attr, ah);
 391 }
 392
 393 static int mthca_ah_destroy(struct ib_ah *ah, u32 flags)
 394 {
 395         mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
 396         return 0;
 397 }
 398
 399 static int mthca_create_srq(struct ib_srq *ibsrq,
 400                             struct ib_srq_init_attr *init_attr,
 401                             struct ib_udata *udata)
 402 {
 403         struct mthca_create_srq ucmd;
 404         struct mthca_ucontext *context = rdma_udata_to_drv_context(
 405                 udata, struct mthca_ucontext, ibucontext);
 406         struct mthca_srq *srq = to_msrq(ibsrq);
 407         int err;
 408
 409         if (init_attr->srq_type != IB_SRQT_BASIC)
 410                 return -EOPNOTSUPP;
 411
 412         if (udata) {
 413                 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
 414                         return -EFAULT;
 415
 416                 err = mthca_map_user_db(to_mdev(ibsrq->device), &context->uar,
 417                                         context->db_tab, ucmd.db_index,
 418                                         ucmd.db_page);
 419
 420                 if (err)
 421                         return err;
 422
 423                 srq->mr.ibmr.lkey = ucmd.lkey;
 424                 srq->db_index     = ucmd.db_index;
 425         }
 426
 427         err = mthca_alloc_srq(to_mdev(ibsrq->device), to_mpd(ibsrq->pd),
 428                               &init_attr->attr, srq, udata);
 429
 430         if (err && udata)
 431                 mthca_unmap_user_db(to_mdev(ibsrq->device), &context->uar,
 432                                     context->db_tab, ucmd.db_index);
 433
 434         if (err)
 435                 return err;
 436
 437         if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof(__u32))) {
 438                 mthca_free_srq(to_mdev(ibsrq->device), srq);
 439                 return -EFAULT;
 440         }
 441
 442         return 0;
 443 }
 444
 445 static int mthca_destroy_srq(struct ib_srq *srq, struct ib_udata *udata)
 446 {
 447         if (udata) {
 448                 struct mthca_ucontext *context =
 449                         rdma_udata_to_drv_context(
 450                                 udata,
 451                                 struct mthca_ucontext,
 452                                 ibucontext);
 453
 454                 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
 455                                     context->db_tab, to_msrq(srq)->db_index);
 456         }
 457
 458         mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
 459         return 0;
 460 }
 461
 462 static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
 463                                      struct ib_qp_init_attr *init_attr,
 464                                      struct ib_udata *udata)
 465 {
 466         struct mthca_ucontext *context = rdma_udata_to_drv_context(
 467                 udata, struct mthca_ucontext, ibucontext);
 468         struct mthca_create_qp ucmd;
 469         struct mthca_qp *qp;
 470         int err;
 471
 472         if (init_attr->create_flags)
 473                 return ERR_PTR(-EOPNOTSUPP);
 474
 475         switch (init_attr->qp_type) {
 476         case IB_QPT_RC:
 477         case IB_QPT_UC:
 478         case IB_QPT_UD:
 479         {
 480                 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
 481                 if (!qp)
 482                         return ERR_PTR(-ENOMEM);
 483
 484                 if (udata) {
 485                         if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 486                                 kfree(qp);
 487                                 return ERR_PTR(-EFAULT);
 488                         }
 489
 490                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 491                                                 context->db_tab,
 492                                                 ucmd.sq_db_index, ucmd.sq_db_page);
 493                         if (err) {
 494                                 kfree(qp);
 495                                 return ERR_PTR(err);
 496                         }
 497
 498                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 499                                                 context->db_tab,
 500                                                 ucmd.rq_db_index, ucmd.rq_db_page);
 501                         if (err) {
 502                                 mthca_unmap_user_db(to_mdev(pd->device),
 503                                                     &context->uar,
 504                                                     context->db_tab,
 505                                                     ucmd.sq_db_index);
 506                                 kfree(qp);
 507                                 return ERR_PTR(err);
 508                         }
 509
 510                         qp->mr.ibmr.lkey = ucmd.lkey;
 511                         qp->sq.db_index  = ucmd.sq_db_index;
 512                         qp->rq.db_index  = ucmd.rq_db_index;
 513                 }
 514
 515                 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
 516                                      to_mcq(init_attr->send_cq),
 517                                      to_mcq(init_attr->recv_cq),
 518                                      init_attr->qp_type, init_attr->sq_sig_type,
 519                                      &init_attr->cap, qp, udata);
 520
 521                 if (err && udata) {
 522                         mthca_unmap_user_db(to_mdev(pd->device),
 523                                             &context->uar,
 524                                             context->db_tab,
 525                                             ucmd.sq_db_index);
 526                         mthca_unmap_user_db(to_mdev(pd->device),
 527                                             &context->uar,
 528                                             context->db_tab,
 529                                             ucmd.rq_db_index);
 530                 }
 531
 532                 qp->ibqp.qp_num = qp->qpn;
 533                 break;
 534         }
 535         case IB_QPT_SMI:
 536         case IB_QPT_GSI:
 537         {
 538                 qp = kzalloc(sizeof(*qp), GFP_KERNEL);
 539                 if (!qp)
 540                         return ERR_PTR(-ENOMEM);
 541                 qp->sqp = kzalloc(sizeof(struct mthca_sqp), GFP_KERNEL);
 542                 if (!qp->sqp) {
 543                         kfree(qp);
 544                         return ERR_PTR(-ENOMEM);
 545                 }
 546
 547                 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
 548
 549                 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
 550                                       to_mcq(init_attr->send_cq),
 551                                       to_mcq(init_attr->recv_cq),
 552                                       init_attr->sq_sig_type, &init_attr->cap,
 553                                       qp->ibqp.qp_num, init_attr->port_num,
 554                                       qp, udata);
 555                 break;
 556         }
 557         default:
 558                 /* Don't support raw QPs */
 559                 return ERR_PTR(-EOPNOTSUPP);
 560         }
 561
 562         if (err) {
 563                 kfree(qp->sqp);
 564                 kfree(qp);
 565                 return ERR_PTR(err);
 566         }
 567
 568         init_attr->cap.max_send_wr     = qp->sq.max;
 569         init_attr->cap.max_recv_wr     = qp->rq.max;
 570         init_attr->cap.max_send_sge    = qp->sq.max_gs;
 571         init_attr->cap.max_recv_sge    = qp->rq.max_gs;
 572         init_attr->cap.max_inline_data = qp->max_inline_data;
 573
 574         return &qp->ibqp;
 575 }
 576
 577 static int mthca_destroy_qp(struct ib_qp *qp, struct ib_udata *udata)
 578 {
 579         if (udata) {
 580                 struct mthca_ucontext *context =
 581                         rdma_udata_to_drv_context(
 582                                 udata,
 583                                 struct mthca_ucontext,
 584                                 ibucontext);
 585
 586                 mthca_unmap_user_db(to_mdev(qp->device),
 587                                     &context->uar,
 588                                     context->db_tab,
 589                                     to_mqp(qp)->sq.db_index);
 590                 mthca_unmap_user_db(to_mdev(qp->device),
 591                                     &context->uar,
 592                                     context->db_tab,
 593                                     to_mqp(qp)->rq.db_index);
 594         }
 595         mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
 596         kfree(to_mqp(qp)->sqp);
 597         kfree(to_mqp(qp));
 598         return 0;
 599 }
 600
 601 static int mthca_create_cq(struct ib_cq *ibcq,
 602                            const struct ib_cq_init_attr *attr,
 603                            struct ib_udata *udata)
 604 {
 605         struct ib_device *ibdev = ibcq->device;
 606         int entries = attr->cqe;
 607         struct mthca_create_cq ucmd;
 608         struct mthca_cq *cq;
 609         int nent;
 610         int err;
 611         struct mthca_ucontext *context = rdma_udata_to_drv_context(
 612                 udata, struct mthca_ucontext, ibucontext);
 613
 614         if (attr->flags)
 615                 return -EOPNOTSUPP;
 616
 617         if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
 618                 return -EINVAL;
 619
 620         if (udata) {
 621                 if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)))
 622                         return -EFAULT;
 623
 624                 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
 625                                         context->db_tab, ucmd.set_db_index,
 626                                         ucmd.set_db_page);
 627                 if (err)
 628                         return err;
 629
 630                 err = mthca_map_user_db(to_mdev(ibdev), &context->uar,
 631                                         context->db_tab, ucmd.arm_db_index,
 632                                         ucmd.arm_db_page);
 633                 if (err)
 634                         goto err_unmap_set;
 635         }
 636
 637         cq = to_mcq(ibcq);
 638
 639         if (udata) {
 640                 cq->buf.mr.ibmr.lkey = ucmd.lkey;
 641                 cq->set_ci_db_index  = ucmd.set_db_index;
 642                 cq->arm_db_index     = ucmd.arm_db_index;
 643         }
 644
 645         for (nent = 1; nent <= entries; nent <<= 1)
 646                 ; /* nothing */
 647
 648         err = mthca_init_cq(to_mdev(ibdev), nent, context,
 649                             udata ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
 650                             cq);
 651         if (err)
 652                 goto err_unmap_arm;
 653
 654         if (udata && ib_copy_to_udata(udata, &cq->cqn, sizeof(__u32))) {
 655                 mthca_free_cq(to_mdev(ibdev), cq);
 656                 err = -EFAULT;
 657                 goto err_unmap_arm;
 658         }
 659
 660         cq->resize_buf = NULL;
 661
 662         return 0;
 663
 664 err_unmap_arm:
 665         if (udata)
 666                 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
 667                                     context->db_tab, ucmd.arm_db_index);
 668
 669 err_unmap_set:
 670         if (udata)
 671                 mthca_unmap_user_db(to_mdev(ibdev), &context->uar,
 672                                     context->db_tab, ucmd.set_db_index);
 673
 674         return err;
 675 }
 676
 677 static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,
 678                                   int entries)
 679 {
 680         int ret;
 681
 682         spin_lock_irq(&cq->lock);
 683         if (cq->resize_buf) {
 684                 ret = -EBUSY;
 685                 goto unlock;
 686         }
 687
 688         cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
 689         if (!cq->resize_buf) {
 690                 ret = -ENOMEM;
 691                 goto unlock;
 692         }
 693
 694         cq->resize_buf->state = CQ_RESIZE_ALLOC;
 695
 696         ret = 0;
 697
 698 unlock:
 699         spin_unlock_irq(&cq->lock);
 700
 701         if (ret)
 702                 return ret;
 703
 704         ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
 705         if (ret) {
 706                 spin_lock_irq(&cq->lock);
 707                 kfree(cq->resize_buf);
 708                 cq->resize_buf = NULL;
 709                 spin_unlock_irq(&cq->lock);
 710                 return ret;
 711         }
 712
 713         cq->resize_buf->cqe = entries - 1;
 714
 715         spin_lock_irq(&cq->lock);
 716         cq->resize_buf->state = CQ_RESIZE_READY;
 717         spin_unlock_irq(&cq->lock);
 718
 719         return 0;
 720 }
 721
 722 static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
 723 {
 724         struct mthca_dev *dev = to_mdev(ibcq->device);
 725         struct mthca_cq *cq = to_mcq(ibcq);
 726         struct mthca_resize_cq ucmd;
 727         u32 lkey;
 728         int ret;
 729
 730         if (entries < 1 || entries > dev->limits.max_cqes)
 731                 return -EINVAL;
 732
 733         mutex_lock(&cq->mutex);
 734
 735         entries = roundup_pow_of_two(entries + 1);
 736         if (entries == ibcq->cqe + 1) {
 737                 ret = 0;
 738                 goto out;
 739         }
 740
 741         if (cq->is_kernel) {
 742                 ret = mthca_alloc_resize_buf(dev, cq, entries);
 743                 if (ret)
 744                         goto out;
 745                 lkey = cq->resize_buf->buf.mr.ibmr.lkey;
 746         } else {
 747                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 748                         ret = -EFAULT;
 749                         goto out;
 750                 }
 751                 lkey = ucmd.lkey;
 752         }
 753
 754         ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries));
 755
 756         if (ret) {
 757                 if (cq->resize_buf) {
 758                         mthca_free_cq_buf(dev, &cq->resize_buf->buf,
 759                                           cq->resize_buf->cqe);
 760                         kfree(cq->resize_buf);
 761                         spin_lock_irq(&cq->lock);
 762                         cq->resize_buf = NULL;
 763                         spin_unlock_irq(&cq->lock);
 764                 }
 765                 goto out;
 766         }
 767
 768         if (cq->is_kernel) {
 769                 struct mthca_cq_buf tbuf;
 770                 int tcqe;
 771
 772                 spin_lock_irq(&cq->lock);
 773                 if (cq->resize_buf->state == CQ_RESIZE_READY) {
 774                         mthca_cq_resize_copy_cqes(cq);
 775                         tbuf         = cq->buf;
 776                         tcqe         = cq->ibcq.cqe;
 777                         cq->buf      = cq->resize_buf->buf;
 778                         cq->ibcq.cqe = cq->resize_buf->cqe;
 779                 } else {
 780                         tbuf = cq->resize_buf->buf;
 781                         tcqe = cq->resize_buf->cqe;
 782                 }
 783
 784                 kfree(cq->resize_buf);
 785                 cq->resize_buf = NULL;
 786                 spin_unlock_irq(&cq->lock);
 787
 788                 mthca_free_cq_buf(dev, &tbuf, tcqe);
 789         } else
 790                 ibcq->cqe = entries - 1;
 791
 792 out:
 793         mutex_unlock(&cq->mutex);
 794
 795         return ret;
 796 }
 797
 798 static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 799 {
 800         if (udata) {
 801                 struct mthca_ucontext *context =
 802                         rdma_udata_to_drv_context(
 803                                 udata,
 804                                 struct mthca_ucontext,
 805                                 ibucontext);
 806
 807                 mthca_unmap_user_db(to_mdev(cq->device),
 808                                     &context->uar,
 809                                     context->db_tab,
 810                                     to_mcq(cq)->arm_db_index);
 811                 mthca_unmap_user_db(to_mdev(cq->device),
 812                                     &context->uar,
 813                                     context->db_tab,
 814                                     to_mcq(cq)->set_ci_db_index);
 815         }
 816         mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
 817         return 0;
 818 }
 819
 820 static inline u32 convert_access(int acc)
 821 {
 822         return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC       : 0) |
 823                (acc & IB_ACCESS_REMOTE_WRITE  ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
 824                (acc & IB_ACCESS_REMOTE_READ   ? MTHCA_MPT_FLAG_REMOTE_READ  : 0) |
 825                (acc & IB_ACCESS_LOCAL_WRITE   ? MTHCA_MPT_FLAG_LOCAL_WRITE  : 0) |
 826                MTHCA_MPT_FLAG_LOCAL_READ;
 827 }
 828
 829 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
 830 {
 831         struct mthca_mr *mr;
 832         int err;
 833
 834         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 835         if (!mr)
 836                 return ERR_PTR(-ENOMEM);
 837
 838         err = mthca_mr_alloc_notrans(to_mdev(pd->device),
 839                                      to_mpd(pd)->pd_num,
 840                                      convert_access(acc), mr);
 841
 842         if (err) {
 843                 kfree(mr);
 844                 return ERR_PTR(err);
 845         }
 846
 847         mr->umem = NULL;
 848
 849         return &mr->ibmr;
 850 }
 851
 852 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 853                                        u64 virt, int acc, struct ib_udata *udata)
 854 {
 855         struct mthca_dev *dev = to_mdev(pd->device);
 856         struct ib_block_iter biter;
 857         struct mthca_ucontext *context = rdma_udata_to_drv_context(
 858                 udata, struct mthca_ucontext, ibucontext);
 859         struct mthca_mr *mr;
 860         struct mthca_reg_mr ucmd;
 861         u64 *pages;
 862         int n, i;
 863         int err = 0;
 864         int write_mtt_size;
 865
 866         if (udata->inlen < sizeof ucmd) {
 867                 if (!context->reg_mr_warned) {
 868                         mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n",
 869                                    current->comm);
 870                         mthca_warn(dev, "  Update libmthca to fix this.\n");
 871                 }
 872                 ++context->reg_mr_warned;
 873                 ucmd.mr_attrs = 0;
 874         } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 875                 return ERR_PTR(-EFAULT);
 876
 877         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 878         if (!mr)
 879                 return ERR_PTR(-ENOMEM);
 880
 881         mr->umem = ib_umem_get(pd->device, start, length, acc);
 882         if (IS_ERR(mr->umem)) {
 883                 err = PTR_ERR(mr->umem);
 884                 goto err;
 885         }
 886
 887         n = ib_umem_num_dma_blocks(mr->umem, PAGE_SIZE);
 888
 889         mr->mtt = mthca_alloc_mtt(dev, n);
 890         if (IS_ERR(mr->mtt)) {
 891                 err = PTR_ERR(mr->mtt);
 892                 goto err_umem;
 893         }
 894
 895         pages = (u64 *) __get_free_page(GFP_KERNEL);
 896         if (!pages) {
 897                 err = -ENOMEM;
 898                 goto err_mtt;
 899         }
 900
 901         i = n = 0;
 902
 903         write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
 904
 905         rdma_umem_for_each_dma_block(mr->umem, &biter, PAGE_SIZE) {
 906                 pages[i++] = rdma_block_iter_dma_address(&biter);
 907
 908                 /*
 909                  * Be friendly to write_mtt and pass it chunks
 910                  * of appropriate size.
 911                  */
 912                 if (i == write_mtt_size) {
 913                         err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
 914                         if (err)
 915                                 goto mtt_done;
 916                         n += i;
 917                         i = 0;
 918                 }
 919         }
 920
 921         if (i)
 922                 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
 923 mtt_done:
 924         free_page((unsigned long) pages);
 925         if (err)
 926                 goto err_mtt;
 927
 928         err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, PAGE_SHIFT, virt, length,
 929                              convert_access(acc), mr);
 930
 931         if (err)
 932                 goto err_mtt;
 933
 934         return &mr->ibmr;
 935
 936 err_mtt:
 937         mthca_free_mtt(dev, mr->mtt);
 938
 939 err_umem:
 940         ib_umem_release(mr->umem);
 941
 942 err:
 943         kfree(mr);
 944         return ERR_PTR(err);
 945 }
 946
 947 static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata)
 948 {
 949         struct mthca_mr *mmr = to_mmr(mr);
 950
 951         mthca_free_mr(to_mdev(mr->device), mmr);
 952         ib_umem_release(mmr->umem);
 953         kfree(mmr);
 954
 955         return 0;
 956 }
 957
 958 static ssize_t hw_rev_show(struct device *device,
 959                            struct device_attribute *attr, char *buf)
 960 {
 961         struct mthca_dev *dev =
 962                 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
 963
 964         return sysfs_emit(buf, "%x\n", dev->rev_id);
 965 }
 966 static DEVICE_ATTR_RO(hw_rev);
 967
 968 static const char *hca_type_string(int hca_type)
 969 {
 970         switch (hca_type) {
 971         case PCI_DEVICE_ID_MELLANOX_TAVOR:
 972                 return "MT23108";
 973         case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
 974                 return "MT25208 (MT23108 compat mode)";
 975         case PCI_DEVICE_ID_MELLANOX_ARBEL:
 976                 return "MT25208";
 977         case PCI_DEVICE_ID_MELLANOX_SINAI:
 978         case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
 979                 return "MT25204";
 980         }
 981
 982         return "unknown";
 983 }
 984
 985 static ssize_t hca_type_show(struct device *device,
 986                              struct device_attribute *attr, char *buf)
 987 {
 988         struct mthca_dev *dev =
 989                 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
 990
 991         return sysfs_emit(buf, "%s\n", hca_type_string(dev->pdev->device));
 992 }
 993 static DEVICE_ATTR_RO(hca_type);
 994
 995 static ssize_t board_id_show(struct device *device,
 996                              struct device_attribute *attr, char *buf)
 997 {
 998         struct mthca_dev *dev =
 999                 rdma_device_to_drv_device(device, struct mthca_dev, ib_dev);
1000
1001         return sysfs_emit(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
1002 }
1003 static DEVICE_ATTR_RO(board_id);
1004
1005 static struct attribute *mthca_dev_attributes[] = {
1006         &dev_attr_hw_rev.attr,
1007         &dev_attr_hca_type.attr,
1008         &dev_attr_board_id.attr,
1009         NULL
1010 };
1011
1012 static const struct attribute_group mthca_attr_group = {
1013         .attrs = mthca_dev_attributes,
1014 };
1015
1016 static int mthca_init_node_data(struct mthca_dev *dev)
1017 {
1018         struct ib_smp *in_mad  = NULL;
1019         struct ib_smp *out_mad = NULL;
1020         int err = -ENOMEM;
1021
1022         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
1023         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1024         if (!in_mad || !out_mad)
1025                 goto out;
1026
1027         init_query_mad(in_mad);
1028         in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
1029
1030         err = mthca_MAD_IFC(dev, 1, 1,
1031                             1, NULL, NULL, in_mad, out_mad);
1032         if (err)
1033                 goto out;
1034
1035         memcpy(dev->ib_dev.node_desc, out_mad->data, IB_DEVICE_NODE_DESC_MAX);
1036
1037         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
1038
1039         err = mthca_MAD_IFC(dev, 1, 1,
1040                             1, NULL, NULL, in_mad, out_mad);
1041         if (err)
1042                 goto out;
1043
1044         if (mthca_is_memfree(dev))
1045                 dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
1046         memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
1047
1048 out:
1049         kfree(in_mad);
1050         kfree(out_mad);
1051         return err;
1052 }
1053
1054 static int mthca_port_immutable(struct ib_device *ibdev, u8 port_num,
1055                                 struct ib_port_immutable *immutable)
1056 {
1057         struct ib_port_attr attr;
1058         int err;
1059
1060         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
1061
1062         err = ib_query_port(ibdev, port_num, &attr);
1063         if (err)
1064                 return err;
1065
1066         immutable->pkey_tbl_len = attr.pkey_tbl_len;
1067         immutable->gid_tbl_len = attr.gid_tbl_len;
1068         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
1069
1070         return 0;
1071 }
1072
1073 static void get_dev_fw_str(struct ib_device *device, char *str)
1074 {
1075         struct mthca_dev *dev =
1076                 container_of(device, struct mthca_dev, ib_dev);
1077         snprintf(str, IB_FW_VERSION_NAME_MAX, "%d.%d.%d",
1078                  (int) (dev->fw_ver >> 32),
1079                  (int) (dev->fw_ver >> 16) & 0xffff,
1080                  (int) dev->fw_ver & 0xffff);
1081 }
1082
1083 static const struct ib_device_ops mthca_dev_ops = {
1084         .owner = THIS_MODULE,
1085         .driver_id = RDMA_DRIVER_MTHCA,
1086         .uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION,
1087         .uverbs_no_driver_id_binding = 1,
1088
1089         .alloc_pd = mthca_alloc_pd,
1090         .alloc_ucontext = mthca_alloc_ucontext,
1091         .attach_mcast = mthca_multicast_attach,
1092         .create_ah = mthca_ah_create,
1093         .create_cq = mthca_create_cq,
1094         .create_qp = mthca_create_qp,
1095         .dealloc_pd = mthca_dealloc_pd,
1096         .dealloc_ucontext = mthca_dealloc_ucontext,
1097         .dereg_mr = mthca_dereg_mr,
1098         .destroy_ah = mthca_ah_destroy,
1099         .destroy_cq = mthca_destroy_cq,
1100         .destroy_qp = mthca_destroy_qp,
1101         .detach_mcast = mthca_multicast_detach,
1102         .get_dev_fw_str = get_dev_fw_str,
1103         .get_dma_mr = mthca_get_dma_mr,
1104         .get_port_immutable = mthca_port_immutable,
1105         .mmap = mthca_mmap_uar,
1106         .modify_device = mthca_modify_device,
1107         .modify_port = mthca_modify_port,
1108         .modify_qp = mthca_modify_qp,
1109         .poll_cq = mthca_poll_cq,
1110         .process_mad = mthca_process_mad,
1111         .query_ah = mthca_ah_query,
1112         .query_device = mthca_query_device,
1113         .query_gid = mthca_query_gid,
1114         .query_pkey = mthca_query_pkey,
1115         .query_port = mthca_query_port,
1116         .query_qp = mthca_query_qp,
1117         .reg_user_mr = mthca_reg_user_mr,
1118         .resize_cq = mthca_resize_cq,
1119
1120         INIT_RDMA_OBJ_SIZE(ib_ah, mthca_ah, ibah),
1121         INIT_RDMA_OBJ_SIZE(ib_cq, mthca_cq, ibcq),
1122         INIT_RDMA_OBJ_SIZE(ib_pd, mthca_pd, ibpd),
1123         INIT_RDMA_OBJ_SIZE(ib_ucontext, mthca_ucontext, ibucontext),
1124 };
1125
1126 static const struct ib_device_ops mthca_dev_arbel_srq_ops = {
1127         .create_srq = mthca_create_srq,
1128         .destroy_srq = mthca_destroy_srq,
1129         .modify_srq = mthca_modify_srq,
1130         .post_srq_recv = mthca_arbel_post_srq_recv,
1131         .query_srq = mthca_query_srq,
1132
1133         INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),
1134 };
1135
1136 static const struct ib_device_ops mthca_dev_tavor_srq_ops = {
1137         .create_srq = mthca_create_srq,
1138         .destroy_srq = mthca_destroy_srq,
1139         .modify_srq = mthca_modify_srq,
1140         .post_srq_recv = mthca_tavor_post_srq_recv,
1141         .query_srq = mthca_query_srq,
1142
1143         INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),
1144 };
1145
1146 static const struct ib_device_ops mthca_dev_arbel_ops = {
1147         .post_recv = mthca_arbel_post_receive,
1148         .post_send = mthca_arbel_post_send,
1149         .req_notify_cq = mthca_arbel_arm_cq,
1150 };
1151
1152 static const struct ib_device_ops mthca_dev_tavor_ops = {
1153         .post_recv = mthca_tavor_post_receive,
1154         .post_send = mthca_tavor_post_send,
1155         .req_notify_cq = mthca_tavor_arm_cq,
1156 };
1157
1158 int mthca_register_device(struct mthca_dev *dev)
1159 {
1160         int ret;
1161
1162         ret = mthca_init_node_data(dev);
1163         if (ret)
1164                 return ret;
1165
1166         dev->ib_dev.node_type            = RDMA_NODE_IB_CA;
1167         dev->ib_dev.phys_port_cnt        = dev->limits.num_ports;
1168         dev->ib_dev.num_comp_vectors     = 1;
1169         dev->ib_dev.dev.parent           = &dev->pdev->dev;
1170
1171         if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1172                 if (mthca_is_memfree(dev))
1173                         ib_set_device_ops(&dev->ib_dev,
1174                                           &mthca_dev_arbel_srq_ops);
1175                 else
1176                         ib_set_device_ops(&dev->ib_dev,
1177                                           &mthca_dev_tavor_srq_ops);
1178         }
1179
1180         ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops);
1181
1182         if (mthca_is_memfree(dev))
1183                 ib_set_device_ops(&dev->ib_dev, &mthca_dev_arbel_ops);
1184         else
1185                 ib_set_device_ops(&dev->ib_dev, &mthca_dev_tavor_ops);
1186
1187         mutex_init(&dev->cap_mask_mutex);
1188
1189         rdma_set_device_sysfs_group(&dev->ib_dev, &mthca_attr_group);
1190         ret = ib_register_device(&dev->ib_dev, "mthca%d", &dev->pdev->dev);
1191         if (ret)
1192                 return ret;
1193
1194         mthca_start_catas_poll(dev);
1195
1196         return 0;
1197 }
1198
1199 void mthca_unregister_device(struct mthca_dev *dev)
1200 {
1201         mthca_stop_catas_poll(dev);
1202         ib_unregister_device(&dev->ib_dev);
1203 }