linux/drivers/infiniband/hw/mthca/mthca_provider.c
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   1/*
   2 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   3 * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   4 * Copyright (c) 2005, 2006 Cisco Systems.  All rights reserved.
   5 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
   6 * Copyright (c) 2004 Voltaire, Inc. All rights reserved.
   7 *
   8 * This software is available to you under a choice of one of two
   9 * licenses.  You may choose to be licensed under the terms of the GNU
  10 * General Public License (GPL) Version 2, available from the file
  11 * COPYING in the main directory of this source tree, or the
  12 * OpenIB.org BSD license below:
  13 *
  14 *     Redistribution and use in source and binary forms, with or
  15 *     without modification, are permitted provided that the following
  16 *     conditions are met:
  17 *
  18 *      - Redistributions of source code must retain the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer.
  21 *
  22 *      - Redistributions in binary form must reproduce the above
  23 *        copyright notice, this list of conditions and the following
  24 *        disclaimer in the documentation and/or other materials
  25 *        provided with the distribution.
  26 *
  27 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  31 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  32 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  33 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  34 * SOFTWARE.
  35 */
  36
  37#include <rdma/ib_smi.h>
  38#include <rdma/ib_umem.h>
  39#include <rdma/ib_user_verbs.h>
  40
  41#include <linux/sched.h>
  42#include <linux/slab.h>
  43#include <linux/mm.h>
  44
  45#include "mthca_dev.h"
  46#include "mthca_cmd.h"
  47#include "mthca_user.h"
  48#include "mthca_memfree.h"
  49
  50static void init_query_mad(struct ib_smp *mad)
  51{
  52        mad->base_version  = 1;
  53        mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
  54        mad->class_version = 1;
  55        mad->method        = IB_MGMT_METHOD_GET;
  56}
  57
  58static int mthca_query_device(struct ib_device *ibdev,
  59                              struct ib_device_attr *props)
  60{
  61        struct ib_smp *in_mad  = NULL;
  62        struct ib_smp *out_mad = NULL;
  63        int err = -ENOMEM;
  64        struct mthca_dev *mdev = to_mdev(ibdev);
  65
  66        u8 status;
  67
  68        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
  69        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
  70        if (!in_mad || !out_mad)
  71                goto out;
  72
  73        memset(props, 0, sizeof *props);
  74
  75        props->fw_ver              = mdev->fw_ver;
  76
  77        init_query_mad(in_mad);
  78        in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
  79
  80        err = mthca_MAD_IFC(mdev, 1, 1,
  81                            1, NULL, NULL, in_mad, out_mad,
  82                            &status);
  83        if (err)
  84                goto out;
  85        if (status) {
  86                err = -EINVAL;
  87                goto out;
  88        }
  89
  90        props->device_cap_flags    = mdev->device_cap_flags;
  91        props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
  92                0xffffff;
  93        props->vendor_part_id      = be16_to_cpup((__be16 *) (out_mad->data + 30));
  94        props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
  95        memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
  96
  97        props->max_mr_size         = ~0ull;
  98        props->page_size_cap       = mdev->limits.page_size_cap;
  99        props->max_qp              = mdev->limits.num_qps - mdev->limits.reserved_qps;
 100        props->max_qp_wr           = mdev->limits.max_wqes;
 101        props->max_sge             = mdev->limits.max_sg;
 102        props->max_cq              = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
 103        props->max_cqe             = mdev->limits.max_cqes;
 104        props->max_mr              = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
 105        props->max_pd              = mdev->limits.num_pds - mdev->limits.reserved_pds;
 106        props->max_qp_rd_atom      = 1 << mdev->qp_table.rdb_shift;
 107        props->max_qp_init_rd_atom = mdev->limits.max_qp_init_rdma;
 108        props->max_res_rd_atom     = props->max_qp_rd_atom * props->max_qp;
 109        props->max_srq             = mdev->limits.num_srqs - mdev->limits.reserved_srqs;
 110        props->max_srq_wr          = mdev->limits.max_srq_wqes;
 111        props->max_srq_sge         = mdev->limits.max_srq_sge;
 112        props->local_ca_ack_delay  = mdev->limits.local_ca_ack_delay;
 113        props->atomic_cap          = mdev->limits.flags & DEV_LIM_FLAG_ATOMIC ?
 114                                        IB_ATOMIC_HCA : IB_ATOMIC_NONE;
 115        props->max_pkeys           = mdev->limits.pkey_table_len;
 116        props->max_mcast_grp       = mdev->limits.num_mgms + mdev->limits.num_amgms;
 117        props->max_mcast_qp_attach = MTHCA_QP_PER_MGM;
 118        props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 119                                           props->max_mcast_grp;
 120        /*
 121         * If Sinai memory key optimization is being used, then only
 122         * the 8-bit key portion will change.  For other HCAs, the
 123         * unused index bits will also be used for FMR remapping.
 124         */
 125        if (mdev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
 126                props->max_map_per_fmr = 255;
 127        else
 128                props->max_map_per_fmr =
 129                        (1 << (32 - ilog2(mdev->limits.num_mpts))) - 1;
 130
 131        err = 0;
 132 out:
 133        kfree(in_mad);
 134        kfree(out_mad);
 135        return err;
 136}
 137
 138static int mthca_query_port(struct ib_device *ibdev,
 139                            u8 port, struct ib_port_attr *props)
 140{
 141        struct ib_smp *in_mad  = NULL;
 142        struct ib_smp *out_mad = NULL;
 143        int err = -ENOMEM;
 144        u8 status;
 145
 146        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 147        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 148        if (!in_mad || !out_mad)
 149                goto out;
 150
 151        memset(props, 0, sizeof *props);
 152
 153        init_query_mad(in_mad);
 154        in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 155        in_mad->attr_mod = cpu_to_be32(port);
 156
 157        err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 158                            port, NULL, NULL, in_mad, out_mad,
 159                            &status);
 160        if (err)
 161                goto out;
 162        if (status) {
 163                err = -EINVAL;
 164                goto out;
 165        }
 166
 167        props->lid               = be16_to_cpup((__be16 *) (out_mad->data + 16));
 168        props->lmc               = out_mad->data[34] & 0x7;
 169        props->sm_lid            = be16_to_cpup((__be16 *) (out_mad->data + 18));
 170        props->sm_sl             = out_mad->data[36] & 0xf;
 171        props->state             = out_mad->data[32] & 0xf;
 172        props->phys_state        = out_mad->data[33] >> 4;
 173        props->port_cap_flags    = be32_to_cpup((__be32 *) (out_mad->data + 20));
 174        props->gid_tbl_len       = to_mdev(ibdev)->limits.gid_table_len;
 175        props->max_msg_sz        = 0x80000000;
 176        props->pkey_tbl_len      = to_mdev(ibdev)->limits.pkey_table_len;
 177        props->bad_pkey_cntr     = be16_to_cpup((__be16 *) (out_mad->data + 46));
 178        props->qkey_viol_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 48));
 179        props->active_width      = out_mad->data[31] & 0xf;
 180        props->active_speed      = out_mad->data[35] >> 4;
 181        props->max_mtu           = out_mad->data[41] & 0xf;
 182        props->active_mtu        = out_mad->data[36] >> 4;
 183        props->subnet_timeout    = out_mad->data[51] & 0x1f;
 184        props->max_vl_num        = out_mad->data[37] >> 4;
 185        props->init_type_reply   = out_mad->data[41] >> 4;
 186
 187 out:
 188        kfree(in_mad);
 189        kfree(out_mad);
 190        return err;
 191}
 192
 193static int mthca_modify_device(struct ib_device *ibdev,
 194                               int mask,
 195                               struct ib_device_modify *props)
 196{
 197        if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
 198                return -EOPNOTSUPP;
 199
 200        if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
 201                if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 202                        return -ERESTARTSYS;
 203                memcpy(ibdev->node_desc, props->node_desc, 64);
 204                mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
 205        }
 206
 207        return 0;
 208}
 209
 210static int mthca_modify_port(struct ib_device *ibdev,
 211                             u8 port, int port_modify_mask,
 212                             struct ib_port_modify *props)
 213{
 214        struct mthca_set_ib_param set_ib;
 215        struct ib_port_attr attr;
 216        int err;
 217        u8 status;
 218
 219        if (mutex_lock_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 220                return -ERESTARTSYS;
 221
 222        err = mthca_query_port(ibdev, port, &attr);
 223        if (err)
 224                goto out;
 225
 226        set_ib.set_si_guid     = 0;
 227        set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
 228
 229        set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
 230                ~props->clr_port_cap_mask;
 231
 232        err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port, &status);
 233        if (err)
 234                goto out;
 235        if (status) {
 236                err = -EINVAL;
 237                goto out;
 238        }
 239
 240out:
 241        mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
 242        return err;
 243}
 244
 245static int mthca_query_pkey(struct ib_device *ibdev,
 246                            u8 port, u16 index, u16 *pkey)
 247{
 248        struct ib_smp *in_mad  = NULL;
 249        struct ib_smp *out_mad = NULL;
 250        int err = -ENOMEM;
 251        u8 status;
 252
 253        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 254        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 255        if (!in_mad || !out_mad)
 256                goto out;
 257
 258        init_query_mad(in_mad);
 259        in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
 260        in_mad->attr_mod = cpu_to_be32(index / 32);
 261
 262        err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 263                            port, NULL, NULL, in_mad, out_mad,
 264                            &status);
 265        if (err)
 266                goto out;
 267        if (status) {
 268                err = -EINVAL;
 269                goto out;
 270        }
 271
 272        *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
 273
 274 out:
 275        kfree(in_mad);
 276        kfree(out_mad);
 277        return err;
 278}
 279
 280static int mthca_query_gid(struct ib_device *ibdev, u8 port,
 281                           int index, union ib_gid *gid)
 282{
 283        struct ib_smp *in_mad  = NULL;
 284        struct ib_smp *out_mad = NULL;
 285        int err = -ENOMEM;
 286        u8 status;
 287
 288        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
 289        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 290        if (!in_mad || !out_mad)
 291                goto out;
 292
 293        init_query_mad(in_mad);
 294        in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
 295        in_mad->attr_mod = cpu_to_be32(port);
 296
 297        err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 298                            port, NULL, NULL, in_mad, out_mad,
 299                            &status);
 300        if (err)
 301                goto out;
 302        if (status) {
 303                err = -EINVAL;
 304                goto out;
 305        }
 306
 307        memcpy(gid->raw, out_mad->data + 8, 8);
 308
 309        init_query_mad(in_mad);
 310        in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
 311        in_mad->attr_mod = cpu_to_be32(index / 8);
 312
 313        err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 314                            port, NULL, NULL, in_mad, out_mad,
 315                            &status);
 316        if (err)
 317                goto out;
 318        if (status) {
 319                err = -EINVAL;
 320                goto out;
 321        }
 322
 323        memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
 324
 325 out:
 326        kfree(in_mad);
 327        kfree(out_mad);
 328        return err;
 329}
 330
 331static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
 332                                                struct ib_udata *udata)
 333{
 334        struct mthca_alloc_ucontext_resp uresp;
 335        struct mthca_ucontext           *context;
 336        int                              err;
 337
 338        if (!(to_mdev(ibdev)->active))
 339                return ERR_PTR(-EAGAIN);
 340
 341        memset(&uresp, 0, sizeof uresp);
 342
 343        uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
 344        if (mthca_is_memfree(to_mdev(ibdev)))
 345                uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
 346        else
 347                uresp.uarc_size = 0;
 348
 349        context = kmalloc(sizeof *context, GFP_KERNEL);
 350        if (!context)
 351                return ERR_PTR(-ENOMEM);
 352
 353        err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
 354        if (err) {
 355                kfree(context);
 356                return ERR_PTR(err);
 357        }
 358
 359        context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
 360        if (IS_ERR(context->db_tab)) {
 361                err = PTR_ERR(context->db_tab);
 362                mthca_uar_free(to_mdev(ibdev), &context->uar);
 363                kfree(context);
 364                return ERR_PTR(err);
 365        }
 366
 367        if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 368                mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
 369                mthca_uar_free(to_mdev(ibdev), &context->uar);
 370                kfree(context);
 371                return ERR_PTR(-EFAULT);
 372        }
 373
 374        context->reg_mr_warned = 0;
 375
 376        return &context->ibucontext;
 377}
 378
 379static int mthca_dealloc_ucontext(struct ib_ucontext *context)
 380{
 381        mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
 382                                  to_mucontext(context)->db_tab);
 383        mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
 384        kfree(to_mucontext(context));
 385
 386        return 0;
 387}
 388
 389static int mthca_mmap_uar(struct ib_ucontext *context,
 390                          struct vm_area_struct *vma)
 391{
 392        if (vma->vm_end - vma->vm_start != PAGE_SIZE)
 393                return -EINVAL;
 394
 395        vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 396
 397        if (io_remap_pfn_range(vma, vma->vm_start,
 398                               to_mucontext(context)->uar.pfn,
 399                               PAGE_SIZE, vma->vm_page_prot))
 400                return -EAGAIN;
 401
 402        return 0;
 403}
 404
 405static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
 406                                    struct ib_ucontext *context,
 407                                    struct ib_udata *udata)
 408{
 409        struct mthca_pd *pd;
 410        int err;
 411
 412        pd = kmalloc(sizeof *pd, GFP_KERNEL);
 413        if (!pd)
 414                return ERR_PTR(-ENOMEM);
 415
 416        err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
 417        if (err) {
 418                kfree(pd);
 419                return ERR_PTR(err);
 420        }
 421
 422        if (context) {
 423                if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
 424                        mthca_pd_free(to_mdev(ibdev), pd);
 425                        kfree(pd);
 426                        return ERR_PTR(-EFAULT);
 427                }
 428        }
 429
 430        return &pd->ibpd;
 431}
 432
 433static int mthca_dealloc_pd(struct ib_pd *pd)
 434{
 435        mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
 436        kfree(pd);
 437
 438        return 0;
 439}
 440
 441static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
 442                                     struct ib_ah_attr *ah_attr)
 443{
 444        int err;
 445        struct mthca_ah *ah;
 446
 447        ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 448        if (!ah)
 449                return ERR_PTR(-ENOMEM);
 450
 451        err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
 452        if (err) {
 453                kfree(ah);
 454                return ERR_PTR(err);
 455        }
 456
 457        return &ah->ibah;
 458}
 459
 460static int mthca_ah_destroy(struct ib_ah *ah)
 461{
 462        mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
 463        kfree(ah);
 464
 465        return 0;
 466}
 467
 468static struct ib_srq *mthca_create_srq(struct ib_pd *pd,
 469                                       struct ib_srq_init_attr *init_attr,
 470                                       struct ib_udata *udata)
 471{
 472        struct mthca_create_srq ucmd;
 473        struct mthca_ucontext *context = NULL;
 474        struct mthca_srq *srq;
 475        int err;
 476
 477        srq = kmalloc(sizeof *srq, GFP_KERNEL);
 478        if (!srq)
 479                return ERR_PTR(-ENOMEM);
 480
 481        if (pd->uobject) {
 482                context = to_mucontext(pd->uobject->context);
 483
 484                if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 485                        err = -EFAULT;
 486                        goto err_free;
 487                }
 488
 489                err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 490                                        context->db_tab, ucmd.db_index,
 491                                        ucmd.db_page);
 492
 493                if (err)
 494                        goto err_free;
 495
 496                srq->mr.ibmr.lkey = ucmd.lkey;
 497                srq->db_index     = ucmd.db_index;
 498        }
 499
 500        err = mthca_alloc_srq(to_mdev(pd->device), to_mpd(pd),
 501                              &init_attr->attr, srq);
 502
 503        if (err && pd->uobject)
 504                mthca_unmap_user_db(to_mdev(pd->device), &context->uar,
 505                                    context->db_tab, ucmd.db_index);
 506
 507        if (err)
 508                goto err_free;
 509
 510        if (context && ib_copy_to_udata(udata, &srq->srqn, sizeof (__u32))) {
 511                mthca_free_srq(to_mdev(pd->device), srq);
 512                err = -EFAULT;
 513                goto err_free;
 514        }
 515
 516        return &srq->ibsrq;
 517
 518err_free:
 519        kfree(srq);
 520
 521        return ERR_PTR(err);
 522}
 523
 524static int mthca_destroy_srq(struct ib_srq *srq)
 525{
 526        struct mthca_ucontext *context;
 527
 528        if (srq->uobject) {
 529                context = to_mucontext(srq->uobject->context);
 530
 531                mthca_unmap_user_db(to_mdev(srq->device), &context->uar,
 532                                    context->db_tab, to_msrq(srq)->db_index);
 533        }
 534
 535        mthca_free_srq(to_mdev(srq->device), to_msrq(srq));
 536        kfree(srq);
 537
 538        return 0;
 539}
 540
 541static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
 542                                     struct ib_qp_init_attr *init_attr,
 543                                     struct ib_udata *udata)
 544{
 545        struct mthca_create_qp ucmd;
 546        struct mthca_qp *qp;
 547        int err;
 548
 549        if (init_attr->create_flags)
 550                return ERR_PTR(-EINVAL);
 551
 552        switch (init_attr->qp_type) {
 553        case IB_QPT_RC:
 554        case IB_QPT_UC:
 555        case IB_QPT_UD:
 556        {
 557                struct mthca_ucontext *context;
 558
 559                qp = kmalloc(sizeof *qp, GFP_KERNEL);
 560                if (!qp)
 561                        return ERR_PTR(-ENOMEM);
 562
 563                if (pd->uobject) {
 564                        context = to_mucontext(pd->uobject->context);
 565
 566                        if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 567                                kfree(qp);
 568                                return ERR_PTR(-EFAULT);
 569                        }
 570
 571                        err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 572                                                context->db_tab,
 573                                                ucmd.sq_db_index, ucmd.sq_db_page);
 574                        if (err) {
 575                                kfree(qp);
 576                                return ERR_PTR(err);
 577                        }
 578
 579                        err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 580                                                context->db_tab,
 581                                                ucmd.rq_db_index, ucmd.rq_db_page);
 582                        if (err) {
 583                                mthca_unmap_user_db(to_mdev(pd->device),
 584                                                    &context->uar,
 585                                                    context->db_tab,
 586                                                    ucmd.sq_db_index);
 587                                kfree(qp);
 588                                return ERR_PTR(err);
 589                        }
 590
 591                        qp->mr.ibmr.lkey = ucmd.lkey;
 592                        qp->sq.db_index  = ucmd.sq_db_index;
 593                        qp->rq.db_index  = ucmd.rq_db_index;
 594                }
 595
 596                err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
 597                                     to_mcq(init_attr->send_cq),
 598                                     to_mcq(init_attr->recv_cq),
 599                                     init_attr->qp_type, init_attr->sq_sig_type,
 600                                     &init_attr->cap, qp);
 601
 602                if (err && pd->uobject) {
 603                        context = to_mucontext(pd->uobject->context);
 604
 605                        mthca_unmap_user_db(to_mdev(pd->device),
 606                                            &context->uar,
 607                                            context->db_tab,
 608                                            ucmd.sq_db_index);
 609                        mthca_unmap_user_db(to_mdev(pd->device),
 610                                            &context->uar,
 611                                            context->db_tab,
 612                                            ucmd.rq_db_index);
 613                }
 614
 615                qp->ibqp.qp_num = qp->qpn;
 616                break;
 617        }
 618        case IB_QPT_SMI:
 619        case IB_QPT_GSI:
 620        {
 621                /* Don't allow userspace to create special QPs */
 622                if (pd->uobject)
 623                        return ERR_PTR(-EINVAL);
 624
 625                qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
 626                if (!qp)
 627                        return ERR_PTR(-ENOMEM);
 628
 629                qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
 630
 631                err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
 632                                      to_mcq(init_attr->send_cq),
 633                                      to_mcq(init_attr->recv_cq),
 634                                      init_attr->sq_sig_type, &init_attr->cap,
 635                                      qp->ibqp.qp_num, init_attr->port_num,
 636                                      to_msqp(qp));
 637                break;
 638        }
 639        default:
 640                /* Don't support raw QPs */
 641                return ERR_PTR(-ENOSYS);
 642        }
 643
 644        if (err) {
 645                kfree(qp);
 646                return ERR_PTR(err);
 647        }
 648
 649        init_attr->cap.max_send_wr     = qp->sq.max;
 650        init_attr->cap.max_recv_wr     = qp->rq.max;
 651        init_attr->cap.max_send_sge    = qp->sq.max_gs;
 652        init_attr->cap.max_recv_sge    = qp->rq.max_gs;
 653        init_attr->cap.max_inline_data = qp->max_inline_data;
 654
 655        return &qp->ibqp;
 656}
 657
 658static int mthca_destroy_qp(struct ib_qp *qp)
 659{
 660        if (qp->uobject) {
 661                mthca_unmap_user_db(to_mdev(qp->device),
 662                                    &to_mucontext(qp->uobject->context)->uar,
 663                                    to_mucontext(qp->uobject->context)->db_tab,
 664                                    to_mqp(qp)->sq.db_index);
 665                mthca_unmap_user_db(to_mdev(qp->device),
 666                                    &to_mucontext(qp->uobject->context)->uar,
 667                                    to_mucontext(qp->uobject->context)->db_tab,
 668                                    to_mqp(qp)->rq.db_index);
 669        }
 670        mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
 671        kfree(qp);
 672        return 0;
 673}
 674
 675static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
 676                                     int comp_vector,
 677                                     struct ib_ucontext *context,
 678                                     struct ib_udata *udata)
 679{
 680        struct mthca_create_cq ucmd;
 681        struct mthca_cq *cq;
 682        int nent;
 683        int err;
 684
 685        if (entries < 1 || entries > to_mdev(ibdev)->limits.max_cqes)
 686                return ERR_PTR(-EINVAL);
 687
 688        if (context) {
 689                if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 690                        return ERR_PTR(-EFAULT);
 691
 692                err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 693                                        to_mucontext(context)->db_tab,
 694                                        ucmd.set_db_index, ucmd.set_db_page);
 695                if (err)
 696                        return ERR_PTR(err);
 697
 698                err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 699                                        to_mucontext(context)->db_tab,
 700                                        ucmd.arm_db_index, ucmd.arm_db_page);
 701                if (err)
 702                        goto err_unmap_set;
 703        }
 704
 705        cq = kmalloc(sizeof *cq, GFP_KERNEL);
 706        if (!cq) {
 707                err = -ENOMEM;
 708                goto err_unmap_arm;
 709        }
 710
 711        if (context) {
 712                cq->buf.mr.ibmr.lkey = ucmd.lkey;
 713                cq->set_ci_db_index  = ucmd.set_db_index;
 714                cq->arm_db_index     = ucmd.arm_db_index;
 715        }
 716
 717        for (nent = 1; nent <= entries; nent <<= 1)
 718                ; /* nothing */
 719
 720        err = mthca_init_cq(to_mdev(ibdev), nent,
 721                            context ? to_mucontext(context) : NULL,
 722                            context ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
 723                            cq);
 724        if (err)
 725                goto err_free;
 726
 727        if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
 728                mthca_free_cq(to_mdev(ibdev), cq);
 729                goto err_free;
 730        }
 731
 732        cq->resize_buf = NULL;
 733
 734        return &cq->ibcq;
 735
 736err_free:
 737        kfree(cq);
 738
 739err_unmap_arm:
 740        if (context)
 741                mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 742                                    to_mucontext(context)->db_tab, ucmd.arm_db_index);
 743
 744err_unmap_set:
 745        if (context)
 746                mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 747                                    to_mucontext(context)->db_tab, ucmd.set_db_index);
 748
 749        return ERR_PTR(err);
 750}
 751
 752static int mthca_alloc_resize_buf(struct mthca_dev *dev, struct mthca_cq *cq,
 753                                  int entries)
 754{
 755        int ret;
 756
 757        spin_lock_irq(&cq->lock);
 758        if (cq->resize_buf) {
 759                ret = -EBUSY;
 760                goto unlock;
 761        }
 762
 763        cq->resize_buf = kmalloc(sizeof *cq->resize_buf, GFP_ATOMIC);
 764        if (!cq->resize_buf) {
 765                ret = -ENOMEM;
 766                goto unlock;
 767        }
 768
 769        cq->resize_buf->state = CQ_RESIZE_ALLOC;
 770
 771        ret = 0;
 772
 773unlock:
 774        spin_unlock_irq(&cq->lock);
 775
 776        if (ret)
 777                return ret;
 778
 779        ret = mthca_alloc_cq_buf(dev, &cq->resize_buf->buf, entries);
 780        if (ret) {
 781                spin_lock_irq(&cq->lock);
 782                kfree(cq->resize_buf);
 783                cq->resize_buf = NULL;
 784                spin_unlock_irq(&cq->lock);
 785                return ret;
 786        }
 787
 788        cq->resize_buf->cqe = entries - 1;
 789
 790        spin_lock_irq(&cq->lock);
 791        cq->resize_buf->state = CQ_RESIZE_READY;
 792        spin_unlock_irq(&cq->lock);
 793
 794        return 0;
 795}
 796
 797static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
 798{
 799        struct mthca_dev *dev = to_mdev(ibcq->device);
 800        struct mthca_cq *cq = to_mcq(ibcq);
 801        struct mthca_resize_cq ucmd;
 802        u32 lkey;
 803        u8 status;
 804        int ret;
 805
 806        if (entries < 1 || entries > dev->limits.max_cqes)
 807                return -EINVAL;
 808
 809        mutex_lock(&cq->mutex);
 810
 811        entries = roundup_pow_of_two(entries + 1);
 812        if (entries == ibcq->cqe + 1) {
 813                ret = 0;
 814                goto out;
 815        }
 816
 817        if (cq->is_kernel) {
 818                ret = mthca_alloc_resize_buf(dev, cq, entries);
 819                if (ret)
 820                        goto out;
 821                lkey = cq->resize_buf->buf.mr.ibmr.lkey;
 822        } else {
 823                if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd)) {
 824                        ret = -EFAULT;
 825                        goto out;
 826                }
 827                lkey = ucmd.lkey;
 828        }
 829
 830        ret = mthca_RESIZE_CQ(dev, cq->cqn, lkey, ilog2(entries), &status);
 831        if (status)
 832                ret = -EINVAL;
 833
 834        if (ret) {
 835                if (cq->resize_buf) {
 836                        mthca_free_cq_buf(dev, &cq->resize_buf->buf,
 837                                          cq->resize_buf->cqe);
 838                        kfree(cq->resize_buf);
 839                        spin_lock_irq(&cq->lock);
 840                        cq->resize_buf = NULL;
 841                        spin_unlock_irq(&cq->lock);
 842                }
 843                goto out;
 844        }
 845
 846        if (cq->is_kernel) {
 847                struct mthca_cq_buf tbuf;
 848                int tcqe;
 849
 850                spin_lock_irq(&cq->lock);
 851                if (cq->resize_buf->state == CQ_RESIZE_READY) {
 852                        mthca_cq_resize_copy_cqes(cq);
 853                        tbuf         = cq->buf;
 854                        tcqe         = cq->ibcq.cqe;
 855                        cq->buf      = cq->resize_buf->buf;
 856                        cq->ibcq.cqe = cq->resize_buf->cqe;
 857                } else {
 858                        tbuf = cq->resize_buf->buf;
 859                        tcqe = cq->resize_buf->cqe;
 860                }
 861
 862                kfree(cq->resize_buf);
 863                cq->resize_buf = NULL;
 864                spin_unlock_irq(&cq->lock);
 865
 866                mthca_free_cq_buf(dev, &tbuf, tcqe);
 867        } else
 868                ibcq->cqe = entries - 1;
 869
 870out:
 871        mutex_unlock(&cq->mutex);
 872
 873        return ret;
 874}
 875
 876static int mthca_destroy_cq(struct ib_cq *cq)
 877{
 878        if (cq->uobject) {
 879                mthca_unmap_user_db(to_mdev(cq->device),
 880                                    &to_mucontext(cq->uobject->context)->uar,
 881                                    to_mucontext(cq->uobject->context)->db_tab,
 882                                    to_mcq(cq)->arm_db_index);
 883                mthca_unmap_user_db(to_mdev(cq->device),
 884                                    &to_mucontext(cq->uobject->context)->uar,
 885                                    to_mucontext(cq->uobject->context)->db_tab,
 886                                    to_mcq(cq)->set_ci_db_index);
 887        }
 888        mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
 889        kfree(cq);
 890
 891        return 0;
 892}
 893
 894static inline u32 convert_access(int acc)
 895{
 896        return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC       : 0) |
 897               (acc & IB_ACCESS_REMOTE_WRITE  ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
 898               (acc & IB_ACCESS_REMOTE_READ   ? MTHCA_MPT_FLAG_REMOTE_READ  : 0) |
 899               (acc & IB_ACCESS_LOCAL_WRITE   ? MTHCA_MPT_FLAG_LOCAL_WRITE  : 0) |
 900               MTHCA_MPT_FLAG_LOCAL_READ;
 901}
 902
 903static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
 904{
 905        struct mthca_mr *mr;
 906        int err;
 907
 908        mr = kmalloc(sizeof *mr, GFP_KERNEL);
 909        if (!mr)
 910                return ERR_PTR(-ENOMEM);
 911
 912        err = mthca_mr_alloc_notrans(to_mdev(pd->device),
 913                                     to_mpd(pd)->pd_num,
 914                                     convert_access(acc), mr);
 915
 916        if (err) {
 917                kfree(mr);
 918                return ERR_PTR(err);
 919        }
 920
 921        mr->umem = NULL;
 922
 923        return &mr->ibmr;
 924}
 925
 926static struct ib_mr *mthca_reg_phys_mr(struct ib_pd       *pd,
 927                                       struct ib_phys_buf *buffer_list,
 928                                       int                 num_phys_buf,
 929                                       int                 acc,
 930                                       u64                *iova_start)
 931{
 932        struct mthca_mr *mr;
 933        u64 *page_list;
 934        u64 total_size;
 935        unsigned long mask;
 936        int shift;
 937        int npages;
 938        int err;
 939        int i, j, n;
 940
 941        mask = buffer_list[0].addr ^ *iova_start;
 942        total_size = 0;
 943        for (i = 0; i < num_phys_buf; ++i) {
 944                if (i != 0)
 945                        mask |= buffer_list[i].addr;
 946                if (i != num_phys_buf - 1)
 947                        mask |= buffer_list[i].addr + buffer_list[i].size;
 948
 949                total_size += buffer_list[i].size;
 950        }
 951
 952        if (mask & ~PAGE_MASK)
 953                return ERR_PTR(-EINVAL);
 954
 955        shift = __ffs(mask | 1 << 31);
 956
 957        buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
 958        buffer_list[0].addr &= ~0ull << shift;
 959
 960        mr = kmalloc(sizeof *mr, GFP_KERNEL);
 961        if (!mr)
 962                return ERR_PTR(-ENOMEM);
 963
 964        npages = 0;
 965        for (i = 0; i < num_phys_buf; ++i)
 966                npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 967
 968        if (!npages)
 969                return &mr->ibmr;
 970
 971        page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
 972        if (!page_list) {
 973                kfree(mr);
 974                return ERR_PTR(-ENOMEM);
 975        }
 976
 977        n = 0;
 978        for (i = 0; i < num_phys_buf; ++i)
 979                for (j = 0;
 980                     j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 981                     ++j)
 982                        page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
 983
 984        mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
 985                  "in PD %x; shift %d, npages %d.\n",
 986                  (unsigned long long) buffer_list[0].addr,
 987                  (unsigned long long) *iova_start,
 988                  to_mpd(pd)->pd_num,
 989                  shift, npages);
 990
 991        err = mthca_mr_alloc_phys(to_mdev(pd->device),
 992                                  to_mpd(pd)->pd_num,
 993                                  page_list, shift, npages,
 994                                  *iova_start, total_size,
 995                                  convert_access(acc), mr);
 996
 997        if (err) {
 998                kfree(page_list);
 999                kfree(mr);
1000                return ERR_PTR(err);
1001        }
1002
1003        kfree(page_list);
1004        mr->umem = NULL;
1005
1006        return &mr->ibmr;
1007}
1008
1009static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
1010                                       u64 virt, 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        struct mthca_reg_mr ucmd;
1016        u64 *pages;
1017        int shift, n, len;
1018        int i, j, k;
1019        int err = 0;
1020        int write_mtt_size;
1021
1022        if (udata->inlen - sizeof (struct ib_uverbs_cmd_hdr) < sizeof ucmd) {
1023                if (!to_mucontext(pd->uobject->context)->reg_mr_warned) {
1024                        mthca_warn(dev, "Process '%s' did not pass in MR attrs.\n",
1025                                   current->comm);
1026                        mthca_warn(dev, "  Update libmthca to fix this.\n");
1027                }
1028                ++to_mucontext(pd->uobject->context)->reg_mr_warned;
1029                ucmd.mr_attrs = 0;
1030        } else if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
1031                return ERR_PTR(-EFAULT);
1032
1033        mr = kmalloc(sizeof *mr, GFP_KERNEL);
1034        if (!mr)
1035                return ERR_PTR(-ENOMEM);
1036
1037        mr->umem = ib_umem_get(pd->uobject->context, start, length, acc,
1038                               ucmd.mr_attrs & MTHCA_MR_DMASYNC);
1039
1040        if (IS_ERR(mr->umem)) {
1041                err = PTR_ERR(mr->umem);
1042                goto err;
1043        }
1044
1045        shift = ffs(mr->umem->page_size) - 1;
1046
1047        n = 0;
1048        list_for_each_entry(chunk, &mr->umem->chunk_list, list)
1049                n += chunk->nents;
1050
1051        mr->mtt = mthca_alloc_mtt(dev, n);
1052        if (IS_ERR(mr->mtt)) {
1053                err = PTR_ERR(mr->mtt);
1054                goto err_umem;
1055        }
1056
1057        pages = (u64 *) __get_free_page(GFP_KERNEL);
1058        if (!pages) {
1059                err = -ENOMEM;
1060                goto err_mtt;
1061        }
1062
1063        i = n = 0;
1064
1065        write_mtt_size = min(mthca_write_mtt_size(dev), (int) (PAGE_SIZE / sizeof *pages));
1066
1067        list_for_each_entry(chunk, &mr->umem->chunk_list, list)
1068                for (j = 0; j < chunk->nmap; ++j) {
1069                        len = sg_dma_len(&chunk->page_list[j]) >> shift;
1070                        for (k = 0; k < len; ++k) {
1071                                pages[i++] = sg_dma_address(&chunk->page_list[j]) +
1072                                        mr->umem->page_size * k;
1073                                /*
1074                                 * Be friendly to write_mtt and pass it chunks
1075                                 * of appropriate size.
1076                                 */
1077                                if (i == write_mtt_size) {
1078                                        err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
1079                                        if (err)
1080                                                goto mtt_done;
1081                                        n += i;
1082                                        i = 0;
1083                                }
1084                        }
1085                }
1086
1087        if (i)
1088                err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
1089mtt_done:
1090        free_page((unsigned long) pages);
1091        if (err)
1092                goto err_mtt;
1093
1094        err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, virt, length,
1095                             convert_access(acc), mr);
1096
1097        if (err)
1098                goto err_mtt;
1099
1100        return &mr->ibmr;
1101
1102err_mtt:
1103        mthca_free_mtt(dev, mr->mtt);
1104
1105err_umem:
1106        ib_umem_release(mr->umem);
1107
1108err:
1109        kfree(mr);
1110        return ERR_PTR(err);
1111}
1112
1113static int mthca_dereg_mr(struct ib_mr *mr)
1114{
1115        struct mthca_mr *mmr = to_mmr(mr);
1116
1117        mthca_free_mr(to_mdev(mr->device), mmr);
1118        if (mmr->umem)
1119                ib_umem_release(mmr->umem);
1120        kfree(mmr);
1121
1122        return 0;
1123}
1124
1125static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
1126                                      struct ib_fmr_attr *fmr_attr)
1127{
1128        struct mthca_fmr *fmr;
1129        int err;
1130
1131        fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
1132        if (!fmr)
1133                return ERR_PTR(-ENOMEM);
1134
1135        memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
1136        err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
1137                             convert_access(mr_access_flags), fmr);
1138
1139        if (err) {
1140                kfree(fmr);
1141                return ERR_PTR(err);
1142        }
1143
1144        return &fmr->ibmr;
1145}
1146
1147static int mthca_dealloc_fmr(struct ib_fmr *fmr)
1148{
1149        struct mthca_fmr *mfmr = to_mfmr(fmr);
1150        int err;
1151
1152        err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
1153        if (err)
1154                return err;
1155
1156        kfree(mfmr);
1157        return 0;
1158}
1159
1160static int mthca_unmap_fmr(struct list_head *fmr_list)
1161{
1162        struct ib_fmr *fmr;
1163        int err;
1164        u8 status;
1165        struct mthca_dev *mdev = NULL;
1166
1167        list_for_each_entry(fmr, fmr_list, list) {
1168                if (mdev && to_mdev(fmr->device) != mdev)
1169                        return -EINVAL;
1170                mdev = to_mdev(fmr->device);
1171        }
1172
1173        if (!mdev)
1174                return 0;
1175
1176        if (mthca_is_memfree(mdev)) {
1177                list_for_each_entry(fmr, fmr_list, list)
1178                        mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
1179
1180                wmb();
1181        } else
1182                list_for_each_entry(fmr, fmr_list, list)
1183                        mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
1184
1185        err = mthca_SYNC_TPT(mdev, &status);
1186        if (err)
1187                return err;
1188        if (status)
1189                return -EINVAL;
1190        return 0;
1191}
1192
1193static ssize_t show_rev(struct device *device, struct device_attribute *attr,
1194                        char *buf)
1195{
1196        struct mthca_dev *dev =
1197                container_of(device, struct mthca_dev, ib_dev.dev);
1198        return sprintf(buf, "%x\n", dev->rev_id);
1199}
1200
1201static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
1202                           char *buf)
1203{
1204        struct mthca_dev *dev =
1205                container_of(device, struct mthca_dev, ib_dev.dev);
1206        return sprintf(buf, "%d.%d.%d\n", (int) (dev->fw_ver >> 32),
1207                       (int) (dev->fw_ver >> 16) & 0xffff,
1208                       (int) dev->fw_ver & 0xffff);
1209}
1210
1211static ssize_t show_hca(struct device *device, struct device_attribute *attr,
1212                        char *buf)
1213{
1214        struct mthca_dev *dev =
1215                container_of(device, struct mthca_dev, ib_dev.dev);
1216        switch (dev->pdev->device) {
1217        case PCI_DEVICE_ID_MELLANOX_TAVOR:
1218                return sprintf(buf, "MT23108\n");
1219        case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
1220                return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
1221        case PCI_DEVICE_ID_MELLANOX_ARBEL:
1222                return sprintf(buf, "MT25208\n");
1223        case PCI_DEVICE_ID_MELLANOX_SINAI:
1224        case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
1225                return sprintf(buf, "MT25204\n");
1226        default:
1227                return sprintf(buf, "unknown\n");
1228        }
1229}
1230
1231static ssize_t show_board(struct device *device, struct device_attribute *attr,
1232                          char *buf)
1233{
1234        struct mthca_dev *dev =
1235                container_of(device, struct mthca_dev, ib_dev.dev);
1236        return sprintf(buf, "%.*s\n", MTHCA_BOARD_ID_LEN, dev->board_id);
1237}
1238
1239static DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
1240static DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
1241static DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
1242static DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);
1243
1244static struct device_attribute *mthca_dev_attributes[] = {
1245        &dev_attr_hw_rev,
1246        &dev_attr_fw_ver,
1247        &dev_attr_hca_type,
1248        &dev_attr_board_id
1249};
1250
1251static int mthca_init_node_data(struct mthca_dev *dev)
1252{
1253        struct ib_smp *in_mad  = NULL;
1254        struct ib_smp *out_mad = NULL;
1255        int err = -ENOMEM;
1256        u8 status;
1257
1258        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
1259        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
1260        if (!in_mad || !out_mad)
1261                goto out;
1262
1263        init_query_mad(in_mad);
1264        in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
1265
1266        err = mthca_MAD_IFC(dev, 1, 1,
1267                            1, NULL, NULL, in_mad, out_mad,
1268                            &status);
1269        if (err)
1270                goto out;
1271        if (status) {
1272                err = -EINVAL;
1273                goto out;
1274        }
1275
1276        memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
1277
1278        in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
1279
1280        err = mthca_MAD_IFC(dev, 1, 1,
1281                            1, NULL, NULL, in_mad, out_mad,
1282                            &status);
1283        if (err)
1284                goto out;
1285        if (status) {
1286                err = -EINVAL;
1287                goto out;
1288        }
1289
1290        if (mthca_is_memfree(dev))
1291                dev->rev_id = be32_to_cpup((__be32 *) (out_mad->data + 32));
1292        memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
1293
1294out:
1295        kfree(in_mad);
1296        kfree(out_mad);
1297        return err;
1298}
1299
1300int mthca_register_device(struct mthca_dev *dev)
1301{
1302        int ret;
1303        int i;
1304
1305        ret = mthca_init_node_data(dev);
1306        if (ret)
1307                return ret;
1308
1309        strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
1310        dev->ib_dev.owner                = THIS_MODULE;
1311
1312        dev->ib_dev.uverbs_abi_ver       = MTHCA_UVERBS_ABI_VERSION;
1313        dev->ib_dev.uverbs_cmd_mask      =
1314                (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
1315                (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
1316                (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
1317                (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
1318                (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
1319                (1ull << IB_USER_VERBS_CMD_REG_MR)              |
1320                (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
1321                (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1322                (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
1323                (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
1324                (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
1325                (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
1326                (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
1327                (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
1328                (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
1329                (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
1330                (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
1331        dev->ib_dev.node_type            = RDMA_NODE_IB_CA;
1332        dev->ib_dev.phys_port_cnt        = dev->limits.num_ports;
1333        dev->ib_dev.num_comp_vectors     = 1;
1334        dev->ib_dev.dma_device           = &dev->pdev->dev;
1335        dev->ib_dev.query_device         = mthca_query_device;
1336        dev->ib_dev.query_port           = mthca_query_port;
1337        dev->ib_dev.modify_device        = mthca_modify_device;
1338        dev->ib_dev.modify_port          = mthca_modify_port;
1339        dev->ib_dev.query_pkey           = mthca_query_pkey;
1340        dev->ib_dev.query_gid            = mthca_query_gid;
1341        dev->ib_dev.alloc_ucontext       = mthca_alloc_ucontext;
1342        dev->ib_dev.dealloc_ucontext     = mthca_dealloc_ucontext;
1343        dev->ib_dev.mmap                 = mthca_mmap_uar;
1344        dev->ib_dev.alloc_pd             = mthca_alloc_pd;
1345        dev->ib_dev.dealloc_pd           = mthca_dealloc_pd;
1346        dev->ib_dev.create_ah            = mthca_ah_create;
1347        dev->ib_dev.query_ah             = mthca_ah_query;
1348        dev->ib_dev.destroy_ah           = mthca_ah_destroy;
1349
1350        if (dev->mthca_flags & MTHCA_FLAG_SRQ) {
1351                dev->ib_dev.create_srq           = mthca_create_srq;
1352                dev->ib_dev.modify_srq           = mthca_modify_srq;
1353                dev->ib_dev.query_srq            = mthca_query_srq;
1354                dev->ib_dev.destroy_srq          = mthca_destroy_srq;
1355                dev->ib_dev.uverbs_cmd_mask     |=
1356                        (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
1357                        (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
1358                        (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
1359                        (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
1360
1361                if (mthca_is_memfree(dev))
1362                        dev->ib_dev.post_srq_recv = mthca_arbel_post_srq_recv;
1363                else
1364                        dev->ib_dev.post_srq_recv = mthca_tavor_post_srq_recv;
1365        }
1366
1367        dev->ib_dev.create_qp            = mthca_create_qp;
1368        dev->ib_dev.modify_qp            = mthca_modify_qp;
1369        dev->ib_dev.query_qp             = mthca_query_qp;
1370        dev->ib_dev.destroy_qp           = mthca_destroy_qp;
1371        dev->ib_dev.create_cq            = mthca_create_cq;
1372        dev->ib_dev.resize_cq            = mthca_resize_cq;
1373        dev->ib_dev.destroy_cq           = mthca_destroy_cq;
1374        dev->ib_dev.poll_cq              = mthca_poll_cq;
1375        dev->ib_dev.get_dma_mr           = mthca_get_dma_mr;
1376        dev->ib_dev.reg_phys_mr          = mthca_reg_phys_mr;
1377        dev->ib_dev.reg_user_mr          = mthca_reg_user_mr;
1378        dev->ib_dev.dereg_mr             = mthca_dereg_mr;
1379
1380        if (dev->mthca_flags & MTHCA_FLAG_FMR) {
1381                dev->ib_dev.alloc_fmr            = mthca_alloc_fmr;
1382                dev->ib_dev.unmap_fmr            = mthca_unmap_fmr;
1383                dev->ib_dev.dealloc_fmr          = mthca_dealloc_fmr;
1384                if (mthca_is_memfree(dev))
1385                        dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
1386                else
1387                        dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
1388        }
1389
1390        dev->ib_dev.attach_mcast         = mthca_multicast_attach;
1391        dev->ib_dev.detach_mcast         = mthca_multicast_detach;
1392        dev->ib_dev.process_mad          = mthca_process_mad;
1393
1394        if (mthca_is_memfree(dev)) {
1395                dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
1396                dev->ib_dev.post_send     = mthca_arbel_post_send;
1397                dev->ib_dev.post_recv     = mthca_arbel_post_receive;
1398        } else {
1399                dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
1400                dev->ib_dev.post_send     = mthca_tavor_post_send;
1401                dev->ib_dev.post_recv     = mthca_tavor_post_receive;
1402        }
1403
1404        mutex_init(&dev->cap_mask_mutex);
1405
1406        ret = ib_register_device(&dev->ib_dev, NULL);
1407        if (ret)
1408                return ret;
1409
1410        for (i = 0; i < ARRAY_SIZE(mthca_dev_attributes); ++i) {
1411                ret = device_create_file(&dev->ib_dev.dev,
1412                                         mthca_dev_attributes[i]);
1413                if (ret) {
1414                        ib_unregister_device(&dev->ib_dev);
1415                        return ret;
1416                }
1417        }
1418
1419        mthca_start_catas_poll(dev);
1420
1421        return 0;
1422}
1423
1424void mthca_unregister_device(struct mthca_dev *dev)
1425{
1426        mthca_stop_catas_poll(dev);
1427        ib_unregister_device(&dev->ib_dev);
1428}
1429
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