git.oblomov.eu Git - linux-2.6/blob - drivers/infiniband/hw/mthca/mthca_provider.c

   1 /*
   2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   4  * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
   5  * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   6  * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
   7  *
   8  * This software is available to you under a choice of one of two
   9  * licenses.  You may choose to be licensed under the terms of the GNU
  10  * General Public License (GPL) Version 2, available from the file
  11  * COPYING in the main directory of this source tree, or the
  12  * OpenIB.org BSD license below:
  13  *
  14  *     Redistribution and use in source and binary forms, with or
  15  *     without modification, are permitted provided that the following
  16  *     conditions are met:
  17  *
  18  *      - Redistributions of source code must retain the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer.
  21  *
  22  *      - Redistributions in binary form must reproduce the above
  23  *        copyright notice, this list of conditions and the following
  24  *        disclaimer in the documentation and/or other materials
  25  *        provided with the distribution.
  26  *
  27  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  31  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  32  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  33  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  34  * SOFTWARE.
  35  *
  36  * $Id: mthca_provider.c 4859 2006-01-09 21:55:10Z roland $
  37  */
  38
  39 #include <rdma/ib_smi.h>
  40 #include <rdma/ib_umem.h>
  41 #include <rdma/ib_user_verbs.h>
  42 #include <linux/mm.h>
  43
  44 #include "mthca_dev.h"
  45 #include "mthca_cmd.h"
  46 #include "mthca_user.h"
  47 #include "mthca_memfree.h"
  48
  49 static void init_query_mad(struct ib_smp *mad)
  50 {
  51         mad->base_version  = 1;
  52         mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
  53         mad->class_version = 1;
  54         mad->method        = IB_MGMT_METHOD_GET;
  55 }
  56
  57 static int mthca_query_device(struct ib_device *ibdev,
  58                               struct ib_device_attr *props)
  59 {
  60         struct ib_smp *in_mad  = NULL;
  61         struct ib_smp *out_mad = NULL;
  62         int err = -ENOMEM;
  63         struct mthca_dev* mdev = to_mdev(ibdev);
  64
  65         u8 status;
  66
  67         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
  68         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
  69         if (!in_mad || !out_mad)
  70                 goto out;
  71
  72         memset(props, 0, sizeof *props);
  73
  74         props->fw_ver              = mdev->fw_ver;
  75
  76         init_query_mad(in_mad);
  77         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
  78
  79         err = mthca_MAD_IFC(mdev, 1, 1,
  80                             1, NULL, NULL, in_mad, out_mad,
  81                             &status);
  82         if (err)
  83                 goto out;
  84         if (status) {
  85                 err = -EINVAL;
  86                 goto out;
  87         }
  88
  89         props->device_cap_flags    = mdev->device_cap_flags;
  90         props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
  91                 0xffffff;
  92         props->vendor_part_id      = be16_to_cpup((__be16 *) (out_mad->data + 30));
  93         props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
  94         memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
  95
  96         props->max_mr_size         = ~0ull;
  97         props->page_size_cap       = mdev->limits.page_size_cap;
  98         props->max_qp              = mdev->limits.num_qps - mdev->limits.reserved_qps;
  99         props->max_qp_wr           = mdev->limits.max_wqes;
 100         props->max_sge             = mdev->limits.max_sg;
 101         props->max_cq              = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
 102         props->max_cqe             = mdev->limits.max_cqes;
 103         props->max_mr              = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
 104         props->max_pd              = mdev->limits.num_pds - mdev->limits.reserved_pds;
 105         props->max_qp_rd_atom      = 1 << mdev->qp_table.rdb_shift;
 106         props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma;
 107         props->max_res_rd_atom     = props->max_qp_rd_atom * props->max_qp;
 108         props->max_srq             = mdev->limits.num_srqs - mdev->limits.reserved_srqs;
 109         props->max_srq_wr          = mdev->limits.max_srq_wqes;
 110         props->max_srq_sge         = mdev->limits.max_srq_sge;
 111         props->local_ca_ack_delay  = mdev->limits.local_ca_ack_delay;
 112         props->atomic_cap          = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
 113                                         IB_ATOMIC_HCA : IB_ATOMIC_NONE;
 114         props->max_pkeys           = mdev->limits.pkey_table_len;
 115         props->max_mcast_grp       = mdev->limits.num_mgms + mdev->limits.num_amgms;
 116         props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
 117         props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 118                                            props->max_mcast_grp;
 119         /*
 120          * If Sinai memory key optimization is being used, then only
 121          * the 8-bit key portion will change.  For other HCAs, the
 122          * unused index bits will also be used for FMR remapping.
 123          */
 124         if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
 125                 props->max_map_per_fmr = 255;
 126         else
 127                 props->max_map_per_fmr =
 128                         (1 << (32 - ilog2(mdev->limits.num_mpts))) - 1;
 129
 130         err = 0;
 131  out:
 132         kfree(in_mad);
 133         kfree(out_mad);
 134         return err;
 135 }
 136
 137 static int mthca_query_port(struct ib_device *ibdev,
 138                             u8 port, struct ib_port_attr *props)
 139 {
 140         struct ib_smp *in_mad  = NULL;
 141         struct ib_smp *out_mad = NULL;
 142         int err = -ENOMEM;
 143         u8 status;
 144
 145         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 146         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 147         if (!in_mad || !out_mad)
 148                 goto out;
 149
 150         memset(props, 0, sizeof *props);
 151
 152         init_query_mad(in_mad);
 153         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 154         in_mad->attr_mod = cpu_to_be32(port);
 155
 156         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 157                             port, NULL, NULL, in_mad, out_mad,
 158                             &status);
 159         if (err)
 160                 goto out;
 161         if (status) {
 162                 err = -EINVAL;
 163                 goto out;
 164         }
 165
 166         props->lid               = be16_to_cpup((__be16 *) (out_mad->data + 16));
 167         props->lmc               = out_mad->data[34] & 0x7;
 168         props->sm_lid            = be16_to_cpup((__be16 *) (out_mad->data + 18));
 169         props->sm_sl             = out_mad->data[36] & 0xf;
 170         props->state             = out_mad->data[32] & 0xf;
 171         props->phys_state        = out_mad->data[33] >> 4;
 172         props->port_cap_flags    = be32_to_cpup((__be32 *) (out_mad->data + 20));
 173         props->gid_tbl_len       = to_mdev(ibdev)->limits.gid_table_len;
 174         props->max_msg_sz        = 0x80000000;
 175         props->pkey_tbl_len      = to_mdev(ibdev)->limits.pkey_table_len;
 176         props->bad_pkey_cntr     = be16_to_cpup((__be16 *) (out_mad->data + 46));
 177         props->qkey_viol_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 48));
 178         props->active_width      = out_mad->data[31] & 0xf;
 179         props->active_speed      = out_mad->data[35] >> 4;
 180         props->max_mtu           = out_mad->data[41] & 0xf;
 181         props->active_mtu        = out_mad->data[36] >> 4;
 182         props->subnet_timeout    = out_mad->data[51] & 0x1f;
 183         props->max_vl_num        = out_mad->data[37] >> 4;
 184         props->init_type_reply   = out_mad->data[41] >> 4;
 185
 186  out:
 187         kfree(in_mad);
 188         kfree(out_mad);
 189         return err;
 190 }
 191
 192 static int mthca_modify_device(struct ib_device *ibdev,
 193                                int mask,
 194                                struct ib_device_modify *props)
 195 {
 196         if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
 197                 return -EOPNOTSUPP;
 198
 199         if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
 200                 if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 201                         return -ERESTARTSYS;
 202                 memcpy(ibdev->node_desc, props->node_desc, 64);
 203                 mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
 204         }
 205
 206         return 0;
 207 }
 208
 209 static int mthca_modify_port(struct ib_device *ibdev,
 210                              u8 port, int port_modify_mask,
 211                              struct ib_port_modify *props)
 212 {
 213         struct mthca_set_ib_param set_ib;
 214         struct ib_port_attr attr;
 215         int err;
 216         u8 status;
 217
 218         if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 219                 return -ERESTARTSYS;
 220
 221         err = mthca_query_port(ibdev, port, &attr);
 222         if (err)
 223                 goto out;
 224
 225         set_ib.set_si_guid     = 0;
 226         set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
 227
 228         set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
 229                 ~props->clr_port_cap_mask;
 230
 231         err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port, &status);
 232         if (err)
 233                 goto out;
 234         if (status) {
 235                 err = -EINVAL;
 236                 goto out;
 237         }
 238
 239 out:
 240         mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
 241         return err;
 242 }
 243
 244 static int mthca_query_pkey(struct ib_device *ibdev,
 245                             u8 port, u16 index, u16 *pkey)
 246 {
 247         struct ib_smp *in_mad  = NULL;
 248         struct ib_smp *out_mad = NULL;
 249         int err = -ENOMEM;
 250         u8 status;
 251
 252         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 253         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 254         if (!in_mad || !out_mad)
 255                 goto out;
 256
 257         init_query_mad(in_mad);
 258         in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
 259         in_mad->attr_mod = cpu_to_be32(index / 32);
 260
 261         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 262                             port, NULL, NULL, in_mad, out_mad,
 263                             &status);
 264         if (err)
 265                 goto out;
 266         if (status) {
 267                 err = -EINVAL;
 268                 goto out;
 269         }
 270
 271         *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
 272
 273  out:
 274         kfree(in_mad);
 275         kfree(out_mad);
 276         return err;
 277 }
 278
 279 static int mthca_query_gid(struct ib_device *ibdev, u8 port,
 280                            int index, union ib_gid *gid)
 281 {
 282         struct ib_smp *in_mad  = NULL;
 283         struct ib_smp *out_mad = NULL;
 284         int err = -ENOMEM;
 285         u8 status;
 286
 287         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 288         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 289         if (!in_mad || !out_mad)
 290                 goto out;
 291
 292         init_query_mad(in_mad);
 293         in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 294         in_mad->attr_mod = cpu_to_be32(port);
 295
 296         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 297                             port, NULL, NULL, in_mad, out_mad,
 298                             &status);
 299         if (err)
 300                 goto out;
 301         if (status) {
 302                 err = -EINVAL;
 303                 goto out;
 304         }
 305
 306         memcpy(gid->raw, out_mad->data + 8, 8);
 307
 308         init_query_mad(in_mad);
 309         in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
 310         in_mad->attr_mod = cpu_to_be32(index / 8);
 311
 312         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 313                             port, NULL, NULL, in_mad, out_mad,
 314                             &status);
 315         if (err)
 316                 goto out;
 317         if (status) {
 318                 err = -EINVAL;
 319                 goto out;
 320         }
 321
 322         memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
 323
 324  out:
 325         kfree(in_mad);
 326         kfree(out_mad);
 327         return err;
 328 }
 329
 330 static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
 331                                                 struct ib_udata *udata)
 332 {
 333         struct mthca_alloc_ucontext_resp uresp;
 334         struct mthca_ucontext           *context;
 335         int                              err;
 336
 337         memset(&uresp, 0, sizeof uresp);
 338
 339         uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
 340         if (mthca_is_memfree(to_mdev(ibdev)))
 341                 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
 342         else
 343                 uresp.uarc_size = 0;
 344
 345         context = kmalloc(sizeof *context, GFP_KERNEL);
 346         if (!context)
 347                 return ERR_PTR(-ENOMEM);
 348
 349         err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
 350         if (err) {
 351                 kfree(context);
 352                 return ERR_PTR(err);
 353         }
 354
 355         context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
 356         if (IS_ERR(context->db_tab)) {
 357                 err = PTR_ERR(context->db_tab);
 358                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 359                 kfree(context);
 360                 return ERR_PTR(err);
 361         }
 362
 363         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 364                 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
 365                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 366                 kfree(context);
 367                 return ERR_PTR(-EFAULT);
 368         }
 369
 370         return &context->ibucontext;
 371 }
 372
 373 static int mthca_dealloc_ucontext(struct ib_ucontext *context)
 374 {
 375         mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
 376                                   to_mucontext(context)->db_tab);
 377         mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
 378         kfree(to_mucontext(context));
 379
 380         return 0;
 381 }
 382
 383 static int mthca_mmap_uar(struct ib_ucontext *context,
 384                           struct vm_area_struct *vma)
 385 {
 386         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
 387                 return -EINVAL;
 388
 389         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 390
 391         if (io_remap_pfn_range(vma, vma->vm_start,
 392                                to_mucontext(context)->uar.pfn,
 393                                PAGE_SIZE, vma->vm_page_prot))
 394                 return -EAGAIN;
 395
 396         return 0;
 397 }
 398
 399 static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
 400                                     struct ib_ucontext *context,
 401                                     struct ib_udata *udata)
 402 {
 403         struct mthca_pd *pd;
 404         int err;
 405
 406         pd = kmalloc(sizeof *pd, GFP_KERNEL);
 407         if (!pd)
 408                 return ERR_PTR(-ENOMEM);
 409
 410         err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
 411         if (err) {
 412                 kfree(pd);
 413                 return ERR_PTR(err);
 414         }
 415
 416         if (context) {
 417                 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
 418                         mthca_pd_free(to_mdev(ibdev), pd);
 419                         kfree(pd);
 420                         return ERR_PTR(-EFAULT);
 421                 }
 422         }
 423
 424         return &pd->ibpd;
 425 }
 426
 427 static int mthca_dealloc_pd(struct ib_pd *pd)
 428 {
 429         mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
 430         kfree(pd);
 431
 432         return 0;
 433 }
 434
 435 static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
 436                                      struct ib_ah_attr *ah_attr)
 437 {
 438         int err;
 439         struct mthca_ah *ah;
 440
 441         ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 442         if (!ah)
 443                 return ERR_PTR(-ENOMEM);
 444
 445         err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
 446         if (err) {
 447                 kfree(ah);
 448                 return ERR_PTR(err);
 449         }
 450
 451         return &ah->ibah;
 452 }
 453
 454 static int mthca_ah_destroy(struct ib_ah *ah)
 455 {
 456         mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
 457         kfree(ah);
 458
 459         return 0;
 460 }
 461
 462 static struct ib_srq *mthca_create_srq(struct ib_pd *pd,
 463                                        struct ib_srq_init_attr *init_attr,
 464                                        struct ib_udata *udata)
 465 {
 466         struct mthca_create_srq ucmd;
 467         struct mthca_ucontext *context = NULL;
 468         struct mthca_srq *srq;
 469         int err;
 470
 471         srq = kmalloc(sizeof *srq, GFP_KERNEL);
 472         if (!srq)
 473                 return ERR_PTR(-ENOMEM);
 474
 475         if (pd->uobject) {
 476                 context = to_mucontext(pd->uobject->context);
 477
 478                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 479                         err = -EFAULT;
 480                         goto err_free;
 481                 }
 482
 483                 err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 484                                         context->db_tab, ucmd.db_index,
 485                                         ucmd.db_page);
 486
 487                 if (err)
 488                         goto err_free;
 489
 490                 srq->mr.ibmr.lkey = ucmd.lkey;
 491                 srq->db_index     = ucmd.db_index;
 492         }
 493
 494         err = mthca_alloc_srq(to_mdev(pd->device), to_mpd(pd),
 495                               &init_attr->attr, srq);
 496
 497         if (err && pd->uobject)
 498                 mthca_unmap_user_db(to_mdev(pd->device), &context->uar,
 499                                     context->db_tab, ucmd.db_index);
 500
 501         if (err)
 502                 goto err_free;
 503
 504         if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof (__u32))) {
 505                 mthca_free_srq(to_mdev(pd->device), srq);
 506                 err = -EFAULT;
 507                 goto err_free;
 508         }
 509
 510         return &srq->ibsrq;
 511
 512 err_free:
 513         kfree(srq);
 514
 515         return ERR_PTR(err);
 516 }
 517
 518 static int mthca_destroy_srq(struct ib_srq *srq)
 519 {
 520         struct mthca_ucontext *context;
 521
 522         if (srq->uobject) {
 523                 context = to_mucontext(srq->uobject->context);
 524
 525                 mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
 526                                     context->db_tab, to_msrq(srq)->db_index);
 527         }
 528
 529         mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
 530         kfree(srq);
 531
 532         return 0;
 533 }
 534
 535 static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
 536                                      struct ib_qp_init_attr *init_attr,
 537                                      struct ib_udata *udata)
 538 {
 539         struct mthca_create_qp ucmd;
 540         struct mthca_qp *qp;
 541         int err;
 542
 543         switch (init_attr->qp_type) {
 544         case IB_QPT_RC:
 545         case IB_QPT_UC:
 546         case IB_QPT_UD:
 547         {
 548                 struct mthca_ucontext *context;
 549
 550                 qp = kmalloc(sizeof *qp, GFP_KERNEL);
 551                 if (!qp)
 552                         return ERR_PTR(-ENOMEM);
 553
 554                 if (pd->uobject) {
 555                         context = to_mucontext(pd->uobject->context);
 556
 557                         if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 558                                 kfree(qp);
 559                                 return ERR_PTR(-EFAULT);
 560                         }
 561
 562                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 563                                                 context->db_tab,
 564                                                 ucmd.sq_db_index, ucmd.sq_db_page);
 565                         if (err) {
 566                                 kfree(qp);
 567                                 return ERR_PTR(err);
 568                         }
 569
 570                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 571                                                 context->db_tab,
 572                                                 ucmd.rq_db_index, ucmd.rq_db_page);
 573                         if (err) {
 574                                 mthca_unmap_user_db(to_mdev(pd->device),
 575                                                     &context->uar,
 576                                                     context->db_tab,
 577                                                     ucmd.sq_db_index);
 578                                 kfree(qp);
 579                                 return ERR_PTR(err);
 580                         }
 581
 582                         qp->mr.ibmr.lkey = ucmd.lkey;
 583                         qp->sq.db_index  = ucmd.sq_db_index;
 584                         qp->rq.db_index  = ucmd.rq_db_index;
 585                 }
 586
 587                 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
 588                                      to_mcq(init_attr->send_cq),
 589                                      to_mcq(init_attr->recv_cq),
 590                                      init_attr->qp_type, init_attr->sq_sig_type,
 591                                      &init_attr->cap, qp);
 592
 593                 if (err && pd->uobject) {
 594                         context = to_mucontext(pd->uobject->context);
 595
 596                         mthca_unmap_user_db(to_mdev(pd->device),
 597                                             &context->uar,
 598                                             context->db_tab,
 599                                             ucmd.sq_db_index);
 600                         mthca_unmap_user_db(to_mdev(pd->device),
 601                                             &context->uar,
 602                                             context->db_tab,
 603                                             ucmd.rq_db_index);
 604                 }
 605
 606                 qp->ibqp.qp_num = qp->qpn;
 607                 break;
 608         }
 609         case IB_QPT_SMI:
 610         case IB_QPT_GSI:
 611         {
 612                 /* Don't allow userspace to create special QPs */
 613                 if (pd->uobject)
 614                         return ERR_PTR(-EINVAL);
 615
 616                 qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
 617                 if (!qp)
 618                         return ERR_PTR(-ENOMEM);
 619
 620                 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
 621
 622                 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
 623                                       to_mcq(init_attr->send_cq),
 624                                       to_mcq(init_attr->recv_cq),
 625                                       init_attr->sq_sig_type, &init_attr->cap,
 626                                       qp->ibqp.qp_num, init_attr->port_num,
 627                                       to_msqp(qp));
 628                 break;
 629         }
 630         default:
 631                 /* Don't support raw QPs */
 632                 return ERR_PTR(-ENOSYS);
 633         }
 634
 635         if (err) {
 636                 kfree(qp);
 637                 return ERR_PTR(err);
 638         }
 639
 640         init_attr->cap.max_send_wr     = qp->sq.max;
 641         init_attr->cap.max_recv_wr     = qp->rq.max;
 642         init_attr->cap.max_send_sge    = qp->sq.max_gs;
 643         init_attr->cap.max_recv_sge    = qp->rq.max_gs;
 644         init_attr->cap.max_inline_data = qp->max_inline_data;
 645
 646         return &qp->ibqp;
 647 }
 648
 649 static int mthca_destroy_qp(struct ib_qp *qp)
 650 {
 651         if (qp->uobject) {
 652                 mthca_unmap_user_db(to_mdev(qp->device),
 653                                     &to_mucontext(qp->uobject->context)->uar,
 654                                     to_mucontext(qp->uobject->context)->db_tab,
 655                                     to_mqp(qp)->sq.db_index);
 656                 mthca_unmap_user_db(to_mdev(qp->device),
 657                                     &to_mucontext(qp->uobject->context)->uar,
 658                                     to_mucontext(qp->uobject->context)->db_tab,
 659                                     to_mqp(qp)->rq.db_index);
 660         }
 661         mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
 662         kfree(qp);
 663         return 0;
 664 }
 665
 666 static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
 667                                      int comp_vector,
 668                                      struct ib_ucontext *context,
 669                                      struct ib_udata *udata)
 670 {
 671         struct mthca_create_cq ucmd;
 672         struct mthca_cq *cq;
 673         int nent;
 674         int err;
 675
 676         if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
 677                 return ERR_PTR(-EINVAL);
 678
 679         if (context) {
 680                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 681                         return ERR_PTR(-EFAULT);
 682
 683                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 684                                         to_mucontext(context)->db_tab,
 685                                         ucmd.set_db_index, ucmd.set_db_page);
 686                 if (err)
 687                         return ERR_PTR(err);
 688
 689                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 690                                         to_mucontext(context)->db_tab,
 691                                         ucmd.arm_db_index, ucmd.arm_db_page);
 692                 if (err)
 693                         goto err_unmap_set;
 694         }
 695
 696         cq = kmalloc(sizeof *cq, GFP_KERNEL);
 697         if (!cq) {
 698                 err = -ENOMEM;
 699                 goto err_unmap_arm;
 700         }
 701
 702         if (context) {
 703                 cq->buf.mr.ibmr.lkey = ucmd.lkey;
 704                 cq->set_ci_db_index  = ucmd.set_db_index;
 705                 cq->arm_db_index     = ucmd.arm_db_index;
 706         }
 707
 708         for (nent = 1; nent <= entries; nent <<= 1)
 709                 ; /* nothing */
 710
 711         err = mthca_init_cq(to_mdev(ibdev), nent,
 712                             context ? to_mucontext(context) : NULL,
 713                             context ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
 714                             cq);
 715         if (err)
 716                 goto err_free;
 717
 718         if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
 719                 mthca_free_cq(to_mdev(ibdev), cq);
 720                 goto err_free;
 721         }
 722
 723         cq->resize_buf = NULL;
 724
 725         return &cq->ibcq;
 726
 727 err_free:
 728         kfree(cq);
 729
 730 err_unmap_arm:
 731         if (context)
 732                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 733                                     to_mucontext(context)->db_tab, ucmd.arm_db_index);
 734
 735 err_unmap_set:
 736         if (context)
 737                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 738                                     to_mucontext(context)->db_tab, ucmd.set_db_index);
 739
 740         return ERR_PTR(err);
 741 }
 742
 743 static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,
 744                                   int entries)
 745 {
 746         int ret;
 747
 748         spin_lock_irq(&cq->lock);
 749         if (cq->resize_buf) {
 750                 ret = -EBUSY;
 751                 goto unlock;
 752         }
 753
 754         cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
 755         if (!cq->resize_buf) {
 756                 ret = -ENOMEM;
 757                 goto unlock;
 758         }
 759
 760         cq->resize_buf->state = CQ_RESIZE_ALLOC;
 761
 762         ret = 0;
 763
 764 unlock:
 765         spin_unlock_irq(&cq->lock);
 766
 767         if (ret)
 768                 return ret;
 769
 770         ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
 771         if (ret) {
 772                 spin_lock_irq(&cq->lock);
 773                 kfree(cq->resize_buf);
 774                 cq->resize_buf = NULL;
 775                 spin_unlock_irq(&cq->lock);
 776                 return ret;
 777         }
 778
 779         cq->resize_buf->cqe = entries - 1;
 780
 781         spin_lock_irq(&cq->lock);
 782         cq->resize_buf->state = CQ_RESIZE_READY;
 783         spin_unlock_irq(&cq->lock);
 784
 785         return 0;
 786 }
 787
 788 static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
 789 {
 790         struct mthca_dev *dev = to_mdev(ibcq->device);
 791         struct mthca_cq *cq = to_mcq(ibcq);
 792         struct mthca_resize_cq ucmd;
 793         u32 lkey;
 794         u8 status;
 795         int ret;
 796
 797         if (entries < 1 || entries > dev->limits.max_cqes)
 798                 return -EINVAL;
 799
 800         mutex_lock(&cq->mutex);
 801
 802         entries = roundup_pow_of_two(entries + 1);
 803         if (entries == ibcq->cqe + 1) {
 804                 ret = 0;
 805                 goto out;
 806         }
 807
 808         if (cq->is_kernel) {
 809                 ret = mthca_alloc_resize_buf(dev, cq, entries);
 810                 if (ret)
 811                         goto out;
 812                 lkey = cq->resize_buf->buf.mr.ibmr.lkey;
 813         } else {
 814                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 815                         ret = -EFAULT;
 816                         goto out;
 817                 }
 818                 lkey = ucmd.lkey;
 819         }
 820
 821         ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries), &status);
 822         if (status)
 823                 ret = -EINVAL;
 824
 825         if (ret) {
 826                 if (cq->resize_buf) {
 827                         mthca_free_cq_buf(dev, &cq->resize_buf->buf,
 828                                           cq->resize_buf->cqe);
 829                         kfree(cq->resize_buf);
 830                         spin_lock_irq(&cq->lock);
 831                         cq->resize_buf = NULL;
 832                         spin_unlock_irq(&cq->lock);
 833                 }
 834                 goto out;
 835         }
 836
 837         if (cq->is_kernel) {
 838                 struct mthca_cq_buf tbuf;
 839                 int tcqe;
 840
 841                 spin_lock_irq(&cq->lock);
 842                 if (cq->resize_buf->state == CQ_RESIZE_READY) {
 843                         mthca_cq_resize_copy_cqes(cq);
 844                         tbuf         = cq->buf;
 845                         tcqe         = cq->ibcq.cqe;
 846                         cq->buf      = cq->resize_buf->buf;
 847                         cq->ibcq.cqe = cq->resize_buf->cqe;
 848                 } else {
 849                         tbuf = cq->resize_buf->buf;
 850                         tcqe = cq->resize_buf->cqe;
 851                 }
 852
 853                 kfree(cq->resize_buf);
 854                 cq->resize_buf = NULL;
 855                 spin_unlock_irq(&cq->lock);
 856
 857                 mthca_free_cq_buf(dev, &tbuf, tcqe);
 858         } else
 859                 ibcq->cqe = entries - 1;
 860
 861 out:
 862         mutex_unlock(&cq->mutex);
 863
 864         return ret;
 865 }
 866
 867 static int mthca_destroy_cq(struct ib_cq *cq)
 868 {
 869         if (cq->uobject) {
 870                 mthca_unmap_user_db(to_mdev(cq->device),
 871                                     &to_mucontext(cq->uobject->context)->uar,
 872                                     to_mucontext(cq->uobject->context)->db_tab,
 873                                     to_mcq(cq)->arm_db_index);
 874                 mthca_unmap_user_db(to_mdev(cq->device),
 875                                     &to_mucontext(cq->uobject->context)->uar,
 876                                     to_mucontext(cq->uobject->context)->db_tab,
 877                                     to_mcq(cq)->set_ci_db_index);
 878         }
 879         mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
 880         kfree(cq);
 881
 882         return 0;
 883 }
 884
 885 static inline u32 convert_access(int acc)
 886 {
 887         return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC       : 0) |
 888                (acc & IB_ACCESS_REMOTE_WRITE  ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
 889                (acc & IB_ACCESS_REMOTE_READ   ? MTHCA_MPT_FLAG_REMOTE_READ  : 0) |
 890                (acc & IB_ACCESS_LOCAL_WRITE   ? MTHCA_MPT_FLAG_LOCAL_WRITE  : 0) |
 891                MTHCA_MPT_FLAG_LOCAL_READ;
 892 }
 893
 894 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
 895 {
 896         struct mthca_mr *mr;
 897         int err;
 898
 899         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 900         if (!mr)
 901                 return ERR_PTR(-ENOMEM);
 902
 903         err = mthca_mr_alloc_notrans(to_mdev(pd->device),
 904                                      to_mpd(pd)->pd_num,
 905                                      convert_access(acc), mr);
 906
 907         if (err) {
 908                 kfree(mr);
 909                 return ERR_PTR(err);
 910         }
 911
 912         mr->umem = NULL;
 913
 914         return &mr->ibmr;
 915 }
 916
 917 static struct ib_mr *mthca_reg_phys_mr(struct ib_pd       *pd,
 918                                        struct ib_phys_buf *buffer_list,
 919                                        int                 num_phys_buf,
 920                                        int                 acc,
 921                                        u64                *iova_start)
 922 {
 923         struct mthca_mr *mr;
 924         u64 *page_list;
 925         u64 total_size;
 926         u64 mask;
 927         int shift;
 928         int npages;
 929         int err;
 930         int i, j, n;
 931
 932         /* First check that we have enough alignment */
 933         if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK))
 934                 return ERR_PTR(-EINVAL);
 935
 936         mask = 0;
 937         total_size = 0;
 938         for (i = 0; i < num_phys_buf; ++i) {
 939                 if (i != 0)
 940                         mask |= buffer_list[i].addr;
 941                 if (i != num_phys_buf - 1)
 942                         mask |= buffer_list[i].addr + buffer_list[i].size;
 943
 944                 total_size += buffer_list[i].size;
 945         }
 946
 947         if (mask & ~PAGE_MASK)
 948                 return ERR_PTR(-EINVAL);
 949
 950         /* Find largest page shift we can use to cover buffers */
 951         for (shift = PAGE_SHIFT; shift < 31; ++shift)
 952                 if (num_phys_buf > 1) {
 953                         if ((1ULL << shift) & mask)
 954                                 break;
 955                 } else {
 956                         if (1ULL << shift >=
 957                             buffer_list[0].size +
 958                             (buffer_list[0].addr & ((1ULL << shift) - 1)))
 959                                 break;
 960                 }
 961
 962         buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
 963         buffer_list[0].addr &= ~0ull << shift;
 964
 965         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 966         if (!mr)
 967                 return ERR_PTR(-ENOMEM);
 968
 969         npages = 0;
 970         for (i = 0; i < num_phys_buf; ++i)
 971                 npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 972
 973         if (!npages)
 974                 return &mr->ibmr;
 975
 976         page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
 977         if (!page_list) {
 978                 kfree(mr);
 979                 return ERR_PTR(-ENOMEM);
 980         }
 981
 982         n = 0;
 983         for (i = 0; i < num_phys_buf; ++i)
 984                 for (j = 0;
 985                      j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 986                      ++j)
 987                         page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
 988
 989         mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
 990                   "in PD %x; shift %d, npages %d.\n",
 991                   (unsigned long long) buffer_list[0].addr,
 992                   (unsigned long long) *iova_start,
 993                   to_mpd(pd)->pd_num,
 994                   shift, npages);
 995
 996         err = mthca_mr_alloc_phys(to_mdev(pd->device),
 997                                   to_mpd(pd)->pd_num,
 998                                   page_list, shift, npages,
 999                                   *iova_start, total_size,
1000                                   convert_access(acc), mr);
1001
1002         if (err) {
1003                 kfree(page_list);
1004                 kfree(mr);
1005                 return ERR_PTR(err);
1006         }
1007
1008         kfree(page_list);
1009         mr->umem = NULL;
1010
1011         return &mr->ibmr;
1012 }
1013
1014 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
1015                                        u64 virt, int acc, struct ib_udata *udata)
1016 {
1017         struct mthca_dev *dev = to_mdev(pd->device);
1018         struct ib_umem_chunk *chunk;
1019         struct mthca_mr *mr;
1020         u64 *pages;
1021         int shift, n, len;
1022         int i, j, k;
1023         int err = 0;
1024         int write_mtt_size;
1025
1026         mr = kmalloc(sizeof *mr, GFP_KERNEL);
1027         if (!mr)
1028                 return ERR_PTR(-ENOMEM);
1029
1030         mr->umem = ib_umem_get(pd->uobject->context, start, length, acc);
1031         if (IS_ERR(mr->umem)) {
1032                 err = PTR_ERR(mr->umem);
1033                 goto err;
1034         }
1035
1036         shift = ffs(mr->umem->page_size) - 1;
1037
1038         n = 0;
1039         list_for_each_entry(chunk, &mr->umem->chunk_list, list)
1040                 n += chunk->nents;
1041
1042         mr->mtt = mthca_alloc_mtt(dev, n);
1043         if (IS_ERR(mr->mtt)) {
1044                 err = PTR_ERR(mr->mtt);
1045                 goto err_umem;
1046         }
1047
1048         pages = (u64 *) __get_free_page(GFP_KERNEL);
1049         if (!pages) {
1050                 err = -ENOMEM;
1051                 goto err_mtt;
1052         }
1053
1054         i = n = 0;
1055
1056         write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
1057
1058         list_for_each_entry(chunk, &mr->umem->chunk_list, list)
1059                 for (j = 0; j < chunk->nmap; ++j) {
1060                         len = sg_dma_len(&chunk->page_list[j]) >> shift;
1061                         for (k = 0; k < len; ++k) {
1062                                 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
1063                                         mr->umem->page_size * k;
1064                                 /*
1065                                  * Be friendly to write_mtt and pass it chunks
1066                                  * of appropriate size.
1067                                  */
1068                                 if (i == write_mtt_size) {
1069                                         err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
1070                                         if (err)
1071                                                 goto mtt_done;
1072                                         n += i;
1073                                         i = 0;
1074                                 }
1075                         }
1076                 }
1077
1078         if (i)
1079                 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
1080 mtt_done:
1081         free_page((unsigned long) pages);
1082         if (err)
1083                 goto err_mtt;
1084
1085         err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, virt, length,
1086                              convert_access(acc), mr);
1087
1088         if (err)
1089                 goto err_mtt;
1090
1091         return &mr->ibmr;
1092
1093 err_mtt:
1094         mthca_free_mtt(dev, mr->mtt);
1095
1096 err_umem:
1097         ib_umem_release(mr->umem);
1098
1099 err:
1100         kfree(mr);
1101         return ERR_PTR(err);
1102 }
1103
1104 static int mthca_dereg_mr(struct ib_mr *mr)
1105 {
1106         struct mthca_mr *mmr = to_mmr(mr);
1107
1108         mthca_free_mr(to_mdev(mr->device), mmr);
1109         if (mmr->umem)
1110                 ib_umem_release(mmr->umem);
1111         kfree(mmr);
1112
1113         return 0;
1114 }
1115
1116 static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
1117                                       struct ib_fmr_attr *fmr_attr)
1118 {
1119         struct mthca_fmr *fmr;
1120         int err;
1121
1122         fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
1123         if (!fmr)
1124                 return ERR_PTR(-ENOMEM);
1125
1126         memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
1127         err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
1128                              convert_access(mr_access_flags), fmr);
1129
1130         if (err) {
1131                 kfree(fmr);
1132                 return ERR_PTR(err);
1133         }
1134
1135         return &fmr->ibmr;
1136 }
1137
1138 static int mthca_dealloc_fmr(struct ib_fmr *fmr)
1139 {
1140         struct mthca_fmr *mfmr = to_mfmr(fmr);
1141         int err;
1142
1143         err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
1144         if (err)
1145                 return err;
1146
1147         kfree(mfmr);
1148         return 0;
1149 }
1150
1151 static int mthca_unmap_fmr(struct list_head *fmr_list)
1152 {
1153         struct ib_fmr *fmr;
1154         int err;
1155         u8 status;
1156         struct mthca_dev *mdev = NULL;
1157
1158         list_for_each_entry(fmr, fmr_list, list) {
1159                 if (mdev && to_mdev(fmr->device) != mdev)
1160                         return -EINVAL;
1161                 mdev = to_mdev(fmr->device);
1162         }
1163
1164         if (!mdev)
1165                 return 0;
1166
1167         if (mthca_is_memfree(mdev)) {
1168                 list_for_each_entry(fmr, fmr_list, list)
1169                         mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
1170
1171                 wmb();
1172         } else
1173                 list_for_each_entry(fmr, fmr_list, list)
1174                         mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
1175
1176         err = mthca_SYNC_TPT(mdev, &status);
1177         if (err)
1178                 return err;
1179         if (status)
1180                 return -EINVAL;
1181         return 0;
1182 }
1183
1184 static ssize_t show_rev(struct class_device *cdev, char *buf)
1185 {
1186         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1187         return sprintf(buf, "%x\n", dev->rev_id);
1188 }
1189
1190 static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
1191 {
1192         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1193         return sprintf(buf, "%d.%d.%d\n", (int) (dev->fw_ver >> 32),
1194                        (int) (dev->fw_ver >> 16) & 0xffff,
1195                        (int) dev->fw_ver & 0xffff);
1196 }
1197
1198 static ssize_t show_hca(struct class_device *cdev, char *buf)
1199 {
1200         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1201         switch (dev->pdev->device) {
1202         case PCI_DEVICE_ID_MELLANOX_TAVOR:
1203                 return sprintf(buf, "MT23108\n");
1204         case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
1205                 return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
1206         case PCI_DEVICE_ID_MELLANOX_ARBEL:
1207                 return sprintf(buf, "MT25208\n");
1208         case PCI_DEVICE_ID_MELLANOX_SINAI:
1209         case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
1210                 return sprintf(buf, "MT25204\n");
1211         default:
1212                 return sprintf(buf, "unknown\n");
1213         }
1214 }
1215
1216 static ssize_t show_board(struct class_device *cdev, char *buf)
1217 {
1218         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
1219         return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
1220 }
1221
1222 static CLASS_DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
1223 static CLASS_DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
1224 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
1225 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
1226
1227 static struct class_device_attribute *mthca_class_attributes[] = {
1228         &class_device_attr_hw_rev,
1229         &class_device_attr_fw_ver,
1230         &class_device_attr_hca_type,
1231         &class_device_attr_board_id
1232 };
1233
1234 static int mthca_init_node_data(struct mthca_dev *dev)
1235 {
1236         struct ib_smp *in_mad  = NULL;
1237         struct ib_smp *out_mad = NULL;
1238         int err = -ENOMEM;
1239         u8 status;
1240
1241         in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
1242         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1243         if (!in_mad || !out_mad)
1244                 goto out;
1245
1246         init_query_mad(in_mad);
1247         in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
1248
1249         err = mthca_MAD_IFC(dev, 1, 1,
1250                             1, NULL, NULL, in_mad, out_mad,
1251                             &status);
1252         if (err)
1253                 goto out;
1254         if (status) {
1255                 err = -EINVAL;
1256                 goto out;
1257         }
1258
1259         memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
1260
1261         in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
1262
1263         err = mthca_MAD_IFC(dev, 1, 1,
1264                             1, NULL, NULL, in_mad, out_mad,
1265                             &status);
1266         if (err)
1267                 goto out;
1268         if (status) {
1269                 err = -EINVAL;
1270                 goto out;
1271         }
1272
1273         memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
1274
1275 out:
1276         kfree(in_mad);
1277         kfree(out_mad);
1278         return err;
1279 }
1280
1281 int mthca_register_device(struct mthca_dev *dev)
1282 {
1283         int ret;
1284         int i;
1285
1286         ret = mthca_init_node_data(dev);
1287         if (ret)
1288                 return ret;
1289
1290         strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
1291         dev->ib_dev.owner                = THIS_MODULE;
1292
1293         dev->ib_dev.uverbs_abi_ver       = MTHCA_UVERBS_ABI_VERSION;
1294         dev->ib_dev.uverbs_cmd_mask      =
1295                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
1296                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
1297                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
1298                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
1299                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
1300                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
1301                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
1302                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1303                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
1304                 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
1305                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
1306                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
1307                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
1308                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
1309                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
1310                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
1311                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
1312         dev->ib_dev.node_type            = RDMA_NODE_IB_CA;
1313         dev->ib_dev.phys_port_cnt        = dev->limits.num_ports;
1314         dev->ib_dev.num_comp_vectors     = 1;
1315         dev->ib_dev.dma_device           = &dev->pdev->dev;
1316         dev->ib_dev.query_device         = mthca_query_device;
1317         dev->ib_dev.query_port           = mthca_query_port;
1318         dev->ib_dev.modify_device        = mthca_modify_device;
1319         dev->ib_dev.modify_port          = mthca_modify_port;
1320         dev->ib_dev.query_pkey           = mthca_query_pkey;
1321         dev->ib_dev.query_gid            = mthca_query_gid;
1322         dev->ib_dev.alloc_ucontext       = mthca_alloc_ucontext;
1323         dev->ib_dev.dealloc_ucontext     = mthca_dealloc_ucontext;
1324         dev->ib_dev.mmap                 = mthca_mmap_uar;
1325         dev->ib_dev.alloc_pd             = mthca_alloc_pd;
1326         dev->ib_dev.dealloc_pd           = mthca_dealloc_pd;
1327         dev->ib_dev.create_ah            = mthca_ah_create;
1328         dev->ib_dev.query_ah             = mthca_ah_query;
1329         dev->ib_dev.destroy_ah           = mthca_ah_destroy;
1330
1331         if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1332                 dev->ib_dev.create_srq           = mthca_create_srq;
1333                 dev->ib_dev.modify_srq           = mthca_modify_srq;
1334                 dev->ib_dev.query_srq            = mthca_query_srq;
1335                 dev->ib_dev.destroy_srq          = mthca_destroy_srq;
1336                 dev->ib_dev.uverbs_cmd_mask     |=
1337                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
1338                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
1339                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
1340                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
1341
1342                 if (mthca_is_memfree(dev))
1343                         dev->ib_dev.post_srq_recv = mthca_arbel_post_srq_recv;
1344                 else
1345                         dev->ib_dev.post_srq_recv = mthca_tavor_post_srq_recv;
1346         }
1347
1348         dev->ib_dev.create_qp            = mthca_create_qp;
1349         dev->ib_dev.modify_qp            = mthca_modify_qp;
1350         dev->ib_dev.query_qp             = mthca_query_qp;
1351         dev->ib_dev.destroy_qp           = mthca_destroy_qp;
1352         dev->ib_dev.create_cq            = mthca_create_cq;
1353         dev->ib_dev.resize_cq            = mthca_resize_cq;
1354         dev->ib_dev.destroy_cq           = mthca_destroy_cq;
1355         dev->ib_dev.poll_cq              = mthca_poll_cq;
1356         dev->ib_dev.get_dma_mr           = mthca_get_dma_mr;
1357         dev->ib_dev.reg_phys_mr          = mthca_reg_phys_mr;
1358         dev->ib_dev.reg_user_mr          = mthca_reg_user_mr;
1359         dev->ib_dev.dereg_mr             = mthca_dereg_mr;
1360
1361         if (dev->mthca_flags & MTHCA_FLAG_FMR) {
1362                 dev->ib_dev.alloc_fmr            = mthca_alloc_fmr;
1363                 dev->ib_dev.unmap_fmr            = mthca_unmap_fmr;
1364                 dev->ib_dev.dealloc_fmr          = mthca_dealloc_fmr;
1365                 if (mthca_is_memfree(dev))
1366                         dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
1367                 else
1368                         dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
1369         }
1370
1371         dev->ib_dev.attach_mcast         = mthca_multicast_attach;
1372         dev->ib_dev.detach_mcast         = mthca_multicast_detach;
1373         dev->ib_dev.process_mad          = mthca_process_mad;
1374
1375         if (mthca_is_memfree(dev)) {
1376                 dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
1377                 dev->ib_dev.post_send     = mthca_arbel_post_send;
1378                 dev->ib_dev.post_recv     = mthca_arbel_post_receive;
1379         } else {
1380                 dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
1381                 dev->ib_dev.post_send     = mthca_tavor_post_send;
1382                 dev->ib_dev.post_recv     = mthca_tavor_post_receive;
1383         }
1384
1385         mutex_init(&dev->cap_mask_mutex);
1386
1387         ret = ib_register_device(&dev->ib_dev);
1388         if (ret)
1389                 return ret;
1390
1391         for (i = 0; i < ARRAY_SIZE(mthca_class_attributes); ++i) {
1392                 ret = class_device_create_file(&dev->ib_dev.class_dev,
1393                                                mthca_class_attributes[i]);
1394                 if (ret) {
1395                         ib_unregister_device(&dev->ib_dev);
1396                         return ret;
1397                 }
1398         }
1399
1400         mthca_start_catas_poll(dev);
1401
1402         return 0;
1403 }
1404
1405 void mthca_unregister_device(struct mthca_dev *dev)
1406 {
1407         mthca_stop_catas_poll(dev);
1408         ib_unregister_device(&dev->ib_dev);
1409 }