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