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

   1 /*
   2  * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
   4  * Copyright (c) 2005 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 1397 2004-12-28 05:09:00Z roland $
  37  */
  38
  39 #include <ib_smi.h>
  40 #include <linux/mm.h>
  41
  42 #include "mthca_dev.h"
  43 #include "mthca_cmd.h"
  44 #include "mthca_user.h"
  45 #include "mthca_memfree.h"
  46
  47 static int mthca_query_device(struct ib_device *ibdev,
  48                               struct ib_device_attr *props)
  49 {
  50         struct ib_smp *in_mad  = NULL;
  51         struct ib_smp *out_mad = NULL;
  52         int err = -ENOMEM;
  53         struct mthca_dev* mdev = to_mdev(ibdev);
  54
  55         u8 status;
  56
  57         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
  58         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
  59         if (!in_mad || !out_mad)
  60                 goto out;
  61
  62         memset(props, 0, sizeof *props);
  63
  64         props->fw_ver              = mdev->fw_ver;
  65
  66         memset(in_mad, 0, sizeof *in_mad);
  67         in_mad->base_version       = 1;
  68         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
  69         in_mad->class_version      = 1;
  70         in_mad->method             = IB_MGMT_METHOD_GET;
  71         in_mad->attr_id            = IB_SMP_ATTR_NODE_INFO;
  72
  73         err = mthca_MAD_IFC(mdev, 1, 1,
  74                             1, NULL, NULL, in_mad, out_mad,
  75                             &status);
  76         if (err)
  77                 goto out;
  78         if (status) {
  79                 err = -EINVAL;
  80                 goto out;
  81         }
  82
  83         props->device_cap_flags    = mdev->device_cap_flags;
  84         props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
  85                 0xffffff;
  86         props->vendor_part_id      = be16_to_cpup((__be16 *) (out_mad->data + 30));
  87         props->hw_ver              = be16_to_cpup((__be16 *) (out_mad->data + 32));
  88         memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
  89         memcpy(&props->node_guid,      out_mad->data + 12, 8);
  90
  91         props->max_mr_size         = ~0ull;
  92         props->max_qp              = mdev->limits.num_qps - mdev->limits.reserved_qps;
  93         props->max_qp_wr           = 0xffff;
  94         props->max_sge             = mdev->limits.max_sg;
  95         props->max_cq              = mdev->limits.num_cqs - mdev->limits.reserved_cqs;
  96         props->max_cqe             = 0xffff;
  97         props->max_mr              = mdev->limits.num_mpts - mdev->limits.reserved_mrws;
  98         props->max_pd              = mdev->limits.num_pds - mdev->limits.reserved_pds;
  99         props->max_qp_rd_atom      = 1 << mdev->qp_table.rdb_shift;
 100         props->max_qp_init_rd_atom = 1 << mdev->qp_table.rdb_shift;
 101         props->local_ca_ack_delay  = mdev->limits.local_ca_ack_delay;
 102
 103         err = 0;
 104  out:
 105         kfree(in_mad);
 106         kfree(out_mad);
 107         return err;
 108 }
 109
 110 static int mthca_query_port(struct ib_device *ibdev,
 111                             u8 port, struct ib_port_attr *props)
 112 {
 113         struct ib_smp *in_mad  = NULL;
 114         struct ib_smp *out_mad = NULL;
 115         int err = -ENOMEM;
 116         u8 status;
 117
 118         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
 119         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 120         if (!in_mad || !out_mad)
 121                 goto out;
 122
 123         memset(in_mad, 0, sizeof *in_mad);
 124         in_mad->base_version       = 1;
 125         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
 126         in_mad->class_version      = 1;
 127         in_mad->method             = IB_MGMT_METHOD_GET;
 128         in_mad->attr_id            = IB_SMP_ATTR_PORT_INFO;
 129         in_mad->attr_mod           = cpu_to_be32(port);
 130
 131         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 132                             port, NULL, NULL, in_mad, out_mad,
 133                             &status);
 134         if (err)
 135                 goto out;
 136         if (status) {
 137                 err = -EINVAL;
 138                 goto out;
 139         }
 140
 141         props->lid               = be16_to_cpup((__be16 *) (out_mad->data + 16));
 142         props->lmc               = out_mad->data[34] & 0x7;
 143         props->sm_lid            = be16_to_cpup((__be16 *) (out_mad->data + 18));
 144         props->sm_sl             = out_mad->data[36] & 0xf;
 145         props->state             = out_mad->data[32] & 0xf;
 146         props->phys_state        = out_mad->data[33] >> 4;
 147         props->port_cap_flags    = be32_to_cpup((__be32 *) (out_mad->data + 20));
 148         props->gid_tbl_len       = to_mdev(ibdev)->limits.gid_table_len;
 149         props->pkey_tbl_len      = to_mdev(ibdev)->limits.pkey_table_len;
 150         props->qkey_viol_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 48));
 151         props->active_width      = out_mad->data[31] & 0xf;
 152         props->active_speed      = out_mad->data[35] >> 4;
 153
 154  out:
 155         kfree(in_mad);
 156         kfree(out_mad);
 157         return err;
 158 }
 159
 160 static int mthca_modify_port(struct ib_device *ibdev,
 161                              u8 port, int port_modify_mask,
 162                              struct ib_port_modify *props)
 163 {
 164         struct mthca_set_ib_param set_ib;
 165         struct ib_port_attr attr;
 166         int err;
 167         u8 status;
 168
 169         if (down_interruptible(&to_mdev(ibdev)->cap_mask_mutex))
 170                 return -ERESTARTSYS;
 171
 172         err = mthca_query_port(ibdev, port, &attr);
 173         if (err)
 174                 goto out;
 175
 176         set_ib.set_si_guid     = 0;
 177         set_ib.reset_qkey_viol = !!(port_modify_mask & IB_PORT_RESET_QKEY_CNTR);
 178
 179         set_ib.cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
 180                 ~props->clr_port_cap_mask;
 181
 182         err = mthca_SET_IB(to_mdev(ibdev), &set_ib, port, &status);
 183         if (err)
 184                 goto out;
 185         if (status) {
 186                 err = -EINVAL;
 187                 goto out;
 188         }
 189
 190 out:
 191         up(&to_mdev(ibdev)->cap_mask_mutex);
 192         return err;
 193 }
 194
 195 static int mthca_query_pkey(struct ib_device *ibdev,
 196                             u8 port, u16 index, u16 *pkey)
 197 {
 198         struct ib_smp *in_mad  = NULL;
 199         struct ib_smp *out_mad = NULL;
 200         int err = -ENOMEM;
 201         u8 status;
 202
 203         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
 204         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 205         if (!in_mad || !out_mad)
 206                 goto out;
 207
 208         memset(in_mad, 0, sizeof *in_mad);
 209         in_mad->base_version       = 1;
 210         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
 211         in_mad->class_version      = 1;
 212         in_mad->method             = IB_MGMT_METHOD_GET;
 213         in_mad->attr_id            = IB_SMP_ATTR_PKEY_TABLE;
 214         in_mad->attr_mod           = cpu_to_be32(index / 32);
 215
 216         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 217                             port, NULL, NULL, in_mad, out_mad,
 218                             &status);
 219         if (err)
 220                 goto out;
 221         if (status) {
 222                 err = -EINVAL;
 223                 goto out;
 224         }
 225
 226         *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
 227
 228  out:
 229         kfree(in_mad);
 230         kfree(out_mad);
 231         return err;
 232 }
 233
 234 static int mthca_query_gid(struct ib_device *ibdev, u8 port,
 235                            int index, union ib_gid *gid)
 236 {
 237         struct ib_smp *in_mad  = NULL;
 238         struct ib_smp *out_mad = NULL;
 239         int err = -ENOMEM;
 240         u8 status;
 241
 242         in_mad  = kmalloc(sizeof *in_mad, GFP_KERNEL);
 243         out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
 244         if (!in_mad || !out_mad)
 245                 goto out;
 246
 247         memset(in_mad, 0, sizeof *in_mad);
 248         in_mad->base_version       = 1;
 249         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
 250         in_mad->class_version      = 1;
 251         in_mad->method             = IB_MGMT_METHOD_GET;
 252         in_mad->attr_id            = IB_SMP_ATTR_PORT_INFO;
 253         in_mad->attr_mod           = cpu_to_be32(port);
 254
 255         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 256                             port, NULL, NULL, in_mad, out_mad,
 257                             &status);
 258         if (err)
 259                 goto out;
 260         if (status) {
 261                 err = -EINVAL;
 262                 goto out;
 263         }
 264
 265         memcpy(gid->raw, out_mad->data + 8, 8);
 266
 267         memset(in_mad, 0, sizeof *in_mad);
 268         in_mad->base_version       = 1;
 269         in_mad->mgmt_class         = IB_MGMT_CLASS_SUBN_LID_ROUTED;
 270         in_mad->class_version      = 1;
 271         in_mad->method             = IB_MGMT_METHOD_GET;
 272         in_mad->attr_id            = IB_SMP_ATTR_GUID_INFO;
 273         in_mad->attr_mod           = cpu_to_be32(index / 8);
 274
 275         err = mthca_MAD_IFC(to_mdev(ibdev), 1, 1,
 276                             port, NULL, NULL, in_mad, out_mad,
 277                             &status);
 278         if (err)
 279                 goto out;
 280         if (status) {
 281                 err = -EINVAL;
 282                 goto out;
 283         }
 284
 285         memcpy(gid->raw + 8, out_mad->data + (index % 8) * 16, 8);
 286
 287  out:
 288         kfree(in_mad);
 289         kfree(out_mad);
 290         return err;
 291 }
 292
 293 static struct ib_ucontext *mthca_alloc_ucontext(struct ib_device *ibdev,
 294                                                 struct ib_udata *udata)
 295 {
 296         struct mthca_alloc_ucontext_resp uresp;
 297         struct mthca_ucontext           *context;
 298         int                              err;
 299
 300         memset(&uresp, 0, sizeof uresp);
 301
 302         uresp.qp_tab_size = to_mdev(ibdev)->limits.num_qps;
 303         if (mthca_is_memfree(to_mdev(ibdev)))
 304                 uresp.uarc_size = to_mdev(ibdev)->uar_table.uarc_size;
 305         else
 306                 uresp.uarc_size = 0;
 307
 308         context = kmalloc(sizeof *context, GFP_KERNEL);
 309         if (!context)
 310                 return ERR_PTR(-ENOMEM);
 311
 312         err = mthca_uar_alloc(to_mdev(ibdev), &context->uar);
 313         if (err) {
 314                 kfree(context);
 315                 return ERR_PTR(err);
 316         }
 317
 318         context->db_tab = mthca_init_user_db_tab(to_mdev(ibdev));
 319         if (IS_ERR(context->db_tab)) {
 320                 err = PTR_ERR(context->db_tab);
 321                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 322                 kfree(context);
 323                 return ERR_PTR(err);
 324         }
 325
 326         if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
 327                 mthca_cleanup_user_db_tab(to_mdev(ibdev), &context->uar, context->db_tab);
 328                 mthca_uar_free(to_mdev(ibdev), &context->uar);
 329                 kfree(context);
 330                 return ERR_PTR(-EFAULT);
 331         }
 332
 333         return &context->ibucontext;
 334 }
 335
 336 static int mthca_dealloc_ucontext(struct ib_ucontext *context)
 337 {
 338         mthca_cleanup_user_db_tab(to_mdev(context->device), &to_mucontext(context)->uar,
 339                                   to_mucontext(context)->db_tab);
 340         mthca_uar_free(to_mdev(context->device), &to_mucontext(context)->uar);
 341         kfree(to_mucontext(context));
 342
 343         return 0;
 344 }
 345
 346 static int mthca_mmap_uar(struct ib_ucontext *context,
 347                           struct vm_area_struct *vma)
 348 {
 349         if (vma->vm_end - vma->vm_start != PAGE_SIZE)
 350                 return -EINVAL;
 351
 352         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 353
 354         if (io_remap_pfn_range(vma, vma->vm_start,
 355                                to_mucontext(context)->uar.pfn,
 356                                PAGE_SIZE, vma->vm_page_prot))
 357                 return -EAGAIN;
 358
 359         return 0;
 360 }
 361
 362 static struct ib_pd *mthca_alloc_pd(struct ib_device *ibdev,
 363                                     struct ib_ucontext *context,
 364                                     struct ib_udata *udata)
 365 {
 366         struct mthca_pd *pd;
 367         int err;
 368
 369         pd = kmalloc(sizeof *pd, GFP_KERNEL);
 370         if (!pd)
 371                 return ERR_PTR(-ENOMEM);
 372
 373         err = mthca_pd_alloc(to_mdev(ibdev), !context, pd);
 374         if (err) {
 375                 kfree(pd);
 376                 return ERR_PTR(err);
 377         }
 378
 379         if (context) {
 380                 if (ib_copy_to_udata(udata, &pd->pd_num, sizeof (__u32))) {
 381                         mthca_pd_free(to_mdev(ibdev), pd);
 382                         kfree(pd);
 383                         return ERR_PTR(-EFAULT);
 384                 }
 385         }
 386
 387         return &pd->ibpd;
 388 }
 389
 390 static int mthca_dealloc_pd(struct ib_pd *pd)
 391 {
 392         mthca_pd_free(to_mdev(pd->device), to_mpd(pd));
 393         kfree(pd);
 394
 395         return 0;
 396 }
 397
 398 static struct ib_ah *mthca_ah_create(struct ib_pd *pd,
 399                                      struct ib_ah_attr *ah_attr)
 400 {
 401         int err;
 402         struct mthca_ah *ah;
 403
 404         ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 405         if (!ah)
 406                 return ERR_PTR(-ENOMEM);
 407
 408         err = mthca_create_ah(to_mdev(pd->device), to_mpd(pd), ah_attr, ah);
 409         if (err) {
 410                 kfree(ah);
 411                 return ERR_PTR(err);
 412         }
 413
 414         return &ah->ibah;
 415 }
 416
 417 static int mthca_ah_destroy(struct ib_ah *ah)
 418 {
 419         mthca_destroy_ah(to_mdev(ah->device), to_mah(ah));
 420         kfree(ah);
 421
 422         return 0;
 423 }
 424
 425 static struct ib_qp *mthca_create_qp(struct ib_pd *pd,
 426                                      struct ib_qp_init_attr *init_attr,
 427                                      struct ib_udata *udata)
 428 {
 429         struct mthca_create_qp ucmd;
 430         struct mthca_qp *qp;
 431         int err;
 432
 433         switch (init_attr->qp_type) {
 434         case IB_QPT_RC:
 435         case IB_QPT_UC:
 436         case IB_QPT_UD:
 437         {
 438                 struct mthca_ucontext *context;
 439
 440                 qp = kmalloc(sizeof *qp, GFP_KERNEL);
 441                 if (!qp)
 442                         return ERR_PTR(-ENOMEM);
 443
 444                 if (pd->uobject) {
 445                         context = to_mucontext(pd->uobject->context);
 446
 447                         if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 448                                 return ERR_PTR(-EFAULT);
 449
 450                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 451                                                 context->db_tab,
 452                                                 ucmd.sq_db_index, ucmd.sq_db_page);
 453                         if (err) {
 454                                 kfree(qp);
 455                                 return ERR_PTR(err);
 456                         }
 457
 458                         err = mthca_map_user_db(to_mdev(pd->device), &context->uar,
 459                                                 context->db_tab,
 460                                                 ucmd.rq_db_index, ucmd.rq_db_page);
 461                         if (err) {
 462                                 mthca_unmap_user_db(to_mdev(pd->device),
 463                                                     &context->uar,
 464                                                     context->db_tab,
 465                                                     ucmd.sq_db_index);
 466                                 kfree(qp);
 467                                 return ERR_PTR(err);
 468                         }
 469
 470                         qp->mr.ibmr.lkey = ucmd.lkey;
 471                         qp->sq.db_index  = ucmd.sq_db_index;
 472                         qp->rq.db_index  = ucmd.rq_db_index;
 473                 }
 474
 475                 err = mthca_alloc_qp(to_mdev(pd->device), to_mpd(pd),
 476                                      to_mcq(init_attr->send_cq),
 477                                      to_mcq(init_attr->recv_cq),
 478                                      init_attr->qp_type, init_attr->sq_sig_type,
 479                                      &init_attr->cap, qp);
 480
 481                 if (err && pd->uobject) {
 482                         context = to_mucontext(pd->uobject->context);
 483
 484                         mthca_unmap_user_db(to_mdev(pd->device),
 485                                             &context->uar,
 486                                             context->db_tab,
 487                                             ucmd.sq_db_index);
 488                         mthca_unmap_user_db(to_mdev(pd->device),
 489                                             &context->uar,
 490                                             context->db_tab,
 491                                             ucmd.rq_db_index);
 492                 }
 493
 494                 qp->ibqp.qp_num = qp->qpn;
 495                 break;
 496         }
 497         case IB_QPT_SMI:
 498         case IB_QPT_GSI:
 499         {
 500                 /* Don't allow userspace to create special QPs */
 501                 if (pd->uobject)
 502                         return ERR_PTR(-EINVAL);
 503
 504                 qp = kmalloc(sizeof (struct mthca_sqp), GFP_KERNEL);
 505                 if (!qp)
 506                         return ERR_PTR(-ENOMEM);
 507
 508                 qp->ibqp.qp_num = init_attr->qp_type == IB_QPT_SMI ? 0 : 1;
 509
 510                 err = mthca_alloc_sqp(to_mdev(pd->device), to_mpd(pd),
 511                                       to_mcq(init_attr->send_cq),
 512                                       to_mcq(init_attr->recv_cq),
 513                                       init_attr->sq_sig_type, &init_attr->cap,
 514                                       qp->ibqp.qp_num, init_attr->port_num,
 515                                       to_msqp(qp));
 516                 break;
 517         }
 518         default:
 519                 /* Don't support raw QPs */
 520                 return ERR_PTR(-ENOSYS);
 521         }
 522
 523         if (err) {
 524                 kfree(qp);
 525                 return ERR_PTR(err);
 526         }
 527
 528         init_attr->cap.max_inline_data = 0;
 529         init_attr->cap.max_send_wr     = qp->sq.max;
 530         init_attr->cap.max_recv_wr     = qp->rq.max;
 531         init_attr->cap.max_send_sge    = qp->sq.max_gs;
 532         init_attr->cap.max_recv_sge    = qp->rq.max_gs;
 533
 534         return &qp->ibqp;
 535 }
 536
 537 static int mthca_destroy_qp(struct ib_qp *qp)
 538 {
 539         if (qp->uobject) {
 540                 mthca_unmap_user_db(to_mdev(qp->device),
 541                                     &to_mucontext(qp->uobject->context)->uar,
 542                                     to_mucontext(qp->uobject->context)->db_tab,
 543                                     to_mqp(qp)->sq.db_index);
 544                 mthca_unmap_user_db(to_mdev(qp->device),
 545                                     &to_mucontext(qp->uobject->context)->uar,
 546                                     to_mucontext(qp->uobject->context)->db_tab,
 547                                     to_mqp(qp)->rq.db_index);
 548         }
 549         mthca_free_qp(to_mdev(qp->device), to_mqp(qp));
 550         kfree(qp);
 551         return 0;
 552 }
 553
 554 static struct ib_cq *mthca_create_cq(struct ib_device *ibdev, int entries,
 555                                      struct ib_ucontext *context,
 556                                      struct ib_udata *udata)
 557 {
 558         struct mthca_create_cq ucmd;
 559         struct mthca_cq *cq;
 560         int nent;
 561         int err;
 562
 563         if (context) {
 564                 if (ib_copy_from_udata(&ucmd, udata, sizeof ucmd))
 565                         return ERR_PTR(-EFAULT);
 566
 567                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 568                                         to_mucontext(context)->db_tab,
 569                                         ucmd.set_db_index, ucmd.set_db_page);
 570                 if (err)
 571                         return ERR_PTR(err);
 572
 573                 err = mthca_map_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 574                                         to_mucontext(context)->db_tab,
 575                                         ucmd.arm_db_index, ucmd.arm_db_page);
 576                 if (err)
 577                         goto err_unmap_set;
 578         }
 579
 580         cq = kmalloc(sizeof *cq, GFP_KERNEL);
 581         if (!cq) {
 582                 err = -ENOMEM;
 583                 goto err_unmap_arm;
 584         }
 585
 586         if (context) {
 587                 cq->mr.ibmr.lkey    = ucmd.lkey;
 588                 cq->set_ci_db_index = ucmd.set_db_index;
 589                 cq->arm_db_index    = ucmd.arm_db_index;
 590         }
 591
 592         for (nent = 1; nent <= entries; nent <<= 1)
 593                 ; /* nothing */
 594
 595         err = mthca_init_cq(to_mdev(ibdev), nent,
 596                             context ? to_mucontext(context) : NULL,
 597                             context ? ucmd.pdn : to_mdev(ibdev)->driver_pd.pd_num,
 598                             cq);
 599         if (err)
 600                 goto err_free;
 601
 602         if (context && ib_copy_to_udata(udata, &cq->cqn, sizeof (__u32))) {
 603                 mthca_free_cq(to_mdev(ibdev), cq);
 604                 goto err_free;
 605         }
 606
 607         return &cq->ibcq;
 608
 609 err_free:
 610         kfree(cq);
 611
 612 err_unmap_arm:
 613         if (context)
 614                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 615                                     to_mucontext(context)->db_tab, ucmd.arm_db_index);
 616
 617 err_unmap_set:
 618         if (context)
 619                 mthca_unmap_user_db(to_mdev(ibdev), &to_mucontext(context)->uar,
 620                                     to_mucontext(context)->db_tab, ucmd.set_db_index);
 621
 622         return ERR_PTR(err);
 623 }
 624
 625 static int mthca_destroy_cq(struct ib_cq *cq)
 626 {
 627         if (cq->uobject) {
 628                 mthca_unmap_user_db(to_mdev(cq->device),
 629                                     &to_mucontext(cq->uobject->context)->uar,
 630                                     to_mucontext(cq->uobject->context)->db_tab,
 631                                     to_mcq(cq)->arm_db_index);
 632                 mthca_unmap_user_db(to_mdev(cq->device),
 633                                     &to_mucontext(cq->uobject->context)->uar,
 634                                     to_mucontext(cq->uobject->context)->db_tab,
 635                                     to_mcq(cq)->set_ci_db_index);
 636         }
 637         mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
 638         kfree(cq);
 639
 640         return 0;
 641 }
 642
 643 static inline u32 convert_access(int acc)
 644 {
 645         return (acc & IB_ACCESS_REMOTE_ATOMIC ? MTHCA_MPT_FLAG_ATOMIC       : 0) |
 646                (acc & IB_ACCESS_REMOTE_WRITE  ? MTHCA_MPT_FLAG_REMOTE_WRITE : 0) |
 647                (acc & IB_ACCESS_REMOTE_READ   ? MTHCA_MPT_FLAG_REMOTE_READ  : 0) |
 648                (acc & IB_ACCESS_LOCAL_WRITE   ? MTHCA_MPT_FLAG_LOCAL_WRITE  : 0) |
 649                MTHCA_MPT_FLAG_LOCAL_READ;
 650 }
 651
 652 static struct ib_mr *mthca_get_dma_mr(struct ib_pd *pd, int acc)
 653 {
 654         struct mthca_mr *mr;
 655         int err;
 656
 657         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 658         if (!mr)
 659                 return ERR_PTR(-ENOMEM);
 660
 661         err = mthca_mr_alloc_notrans(to_mdev(pd->device),
 662                                      to_mpd(pd)->pd_num,
 663                                      convert_access(acc), mr);
 664
 665         if (err) {
 666                 kfree(mr);
 667                 return ERR_PTR(err);
 668         }
 669
 670         return &mr->ibmr;
 671 }
 672
 673 static struct ib_mr *mthca_reg_phys_mr(struct ib_pd       *pd,
 674                                        struct ib_phys_buf *buffer_list,
 675                                        int                 num_phys_buf,
 676                                        int                 acc,
 677                                        u64                *iova_start)
 678 {
 679         struct mthca_mr *mr;
 680         u64 *page_list;
 681         u64 total_size;
 682         u64 mask;
 683         int shift;
 684         int npages;
 685         int err;
 686         int i, j, n;
 687
 688         /* First check that we have enough alignment */
 689         if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK))
 690                 return ERR_PTR(-EINVAL);
 691
 692         if (num_phys_buf > 1 &&
 693             ((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK))
 694                 return ERR_PTR(-EINVAL);
 695
 696         mask = 0;
 697         total_size = 0;
 698         for (i = 0; i < num_phys_buf; ++i) {
 699                 if (i != 0 && buffer_list[i].addr & ~PAGE_MASK)
 700                         return ERR_PTR(-EINVAL);
 701                 if (i != 0 && i != num_phys_buf - 1 &&
 702                     (buffer_list[i].size & ~PAGE_MASK))
 703                         return ERR_PTR(-EINVAL);
 704
 705                 total_size += buffer_list[i].size;
 706                 if (i > 0)
 707                         mask |= buffer_list[i].addr;
 708         }
 709
 710         /* Find largest page shift we can use to cover buffers */
 711         for (shift = PAGE_SHIFT; shift < 31; ++shift)
 712                 if (num_phys_buf > 1) {
 713                         if ((1ULL << shift) & mask)
 714                                 break;
 715                 } else {
 716                         if (1ULL << shift >=
 717                             buffer_list[0].size +
 718                             (buffer_list[0].addr & ((1ULL << shift) - 1)))
 719                                 break;
 720                 }
 721
 722         buffer_list[0].size += buffer_list[0].addr & ((1ULL << shift) - 1);
 723         buffer_list[0].addr &= ~0ull << shift;
 724
 725         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 726         if (!mr)
 727                 return ERR_PTR(-ENOMEM);
 728
 729         npages = 0;
 730         for (i = 0; i < num_phys_buf; ++i)
 731                 npages += (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 732
 733         if (!npages)
 734                 return &mr->ibmr;
 735
 736         page_list = kmalloc(npages * sizeof *page_list, GFP_KERNEL);
 737         if (!page_list) {
 738                 kfree(mr);
 739                 return ERR_PTR(-ENOMEM);
 740         }
 741
 742         n = 0;
 743         for (i = 0; i < num_phys_buf; ++i)
 744                 for (j = 0;
 745                      j < (buffer_list[i].size + (1ULL << shift) - 1) >> shift;
 746                      ++j)
 747                         page_list[n++] = buffer_list[i].addr + ((u64) j << shift);
 748
 749         mthca_dbg(to_mdev(pd->device), "Registering memory at %llx (iova %llx) "
 750                   "in PD %x; shift %d, npages %d.\n",
 751                   (unsigned long long) buffer_list[0].addr,
 752                   (unsigned long long) *iova_start,
 753                   to_mpd(pd)->pd_num,
 754                   shift, npages);
 755
 756         err = mthca_mr_alloc_phys(to_mdev(pd->device),
 757                                   to_mpd(pd)->pd_num,
 758                                   page_list, shift, npages,
 759                                   *iova_start, total_size,
 760                                   convert_access(acc), mr);
 761
 762         if (err) {
 763                 kfree(page_list);
 764                 kfree(mr);
 765                 return ERR_PTR(err);
 766         }
 767
 768         kfree(page_list);
 769         return &mr->ibmr;
 770 }
 771
 772 static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem *region,
 773                                        int acc, struct ib_udata *udata)
 774 {
 775         struct mthca_dev *dev = to_mdev(pd->device);
 776         struct ib_umem_chunk *chunk;
 777         struct mthca_mr *mr;
 778         u64 *pages;
 779         int shift, n, len;
 780         int i, j, k;
 781         int err = 0;
 782
 783         shift = ffs(region->page_size) - 1;
 784
 785         mr = kmalloc(sizeof *mr, GFP_KERNEL);
 786         if (!mr)
 787                 return ERR_PTR(-ENOMEM);
 788
 789         n = 0;
 790         list_for_each_entry(chunk, &region->chunk_list, list)
 791                 n += chunk->nents;
 792
 793         mr->mtt = mthca_alloc_mtt(dev, n);
 794         if (IS_ERR(mr->mtt)) {
 795                 err = PTR_ERR(mr->mtt);
 796                 goto err;
 797         }
 798
 799         pages = (u64 *) __get_free_page(GFP_KERNEL);
 800         if (!pages) {
 801                 err = -ENOMEM;
 802                 goto err_mtt;
 803         }
 804
 805         i = n = 0;
 806
 807         list_for_each_entry(chunk, &region->chunk_list, list)
 808                 for (j = 0; j < chunk->nmap; ++j) {
 809                         len = sg_dma_len(&chunk->page_list[j]) >> shift;
 810                         for (k = 0; k < len; ++k) {
 811                                 pages[i++] = sg_dma_address(&chunk->page_list[j]) +
 812                                         region->page_size * k;
 813                                 /*
 814                                  * Be friendly to WRITE_MTT command
 815                                  * and leave two empty slots for the
 816                                  * index and reserved fields of the
 817                                  * mailbox.
 818                                  */
 819                                 if (i == PAGE_SIZE / sizeof (u64) - 2) {
 820                                         err = mthca_write_mtt(dev, mr->mtt,
 821                                                               n, pages, i);
 822                                         if (err)
 823                                                 goto mtt_done;
 824                                         n += i;
 825                                         i = 0;
 826                                 }
 827                         }
 828                 }
 829
 830         if (i)
 831                 err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
 832 mtt_done:
 833         free_page((unsigned long) pages);
 834         if (err)
 835                 goto err_mtt;
 836
 837         err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, region->virt_base,
 838                              region->length, convert_access(acc), mr);
 839
 840         if (err)
 841                 goto err_mtt;
 842
 843         return &mr->ibmr;
 844
 845 err_mtt:
 846         mthca_free_mtt(dev, mr->mtt);
 847
 848 err:
 849         kfree(mr);
 850         return ERR_PTR(err);
 851 }
 852
 853 static int mthca_dereg_mr(struct ib_mr *mr)
 854 {
 855         struct mthca_mr *mmr = to_mmr(mr);
 856         mthca_free_mr(to_mdev(mr->device), mmr);
 857         kfree(mmr);
 858         return 0;
 859 }
 860
 861 static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
 862                                       struct ib_fmr_attr *fmr_attr)
 863 {
 864         struct mthca_fmr *fmr;
 865         int err;
 866
 867         fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
 868         if (!fmr)
 869                 return ERR_PTR(-ENOMEM);
 870
 871         memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
 872         err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
 873                              convert_access(mr_access_flags), fmr);
 874
 875         if (err) {
 876                 kfree(fmr);
 877                 return ERR_PTR(err);
 878         }
 879
 880         return &fmr->ibmr;
 881 }
 882
 883 static int mthca_dealloc_fmr(struct ib_fmr *fmr)
 884 {
 885         struct mthca_fmr *mfmr = to_mfmr(fmr);
 886         int err;
 887
 888         err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
 889         if (err)
 890                 return err;
 891
 892         kfree(mfmr);
 893         return 0;
 894 }
 895
 896 static int mthca_unmap_fmr(struct list_head *fmr_list)
 897 {
 898         struct ib_fmr *fmr;
 899         int err;
 900         u8 status;
 901         struct mthca_dev *mdev = NULL;
 902
 903         list_for_each_entry(fmr, fmr_list, list) {
 904                 if (mdev && to_mdev(fmr->device) != mdev)
 905                         return -EINVAL;
 906                 mdev = to_mdev(fmr->device);
 907         }
 908
 909         if (!mdev)
 910                 return 0;
 911
 912         if (mthca_is_memfree(mdev)) {
 913                 list_for_each_entry(fmr, fmr_list, list)
 914                         mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
 915
 916                 wmb();
 917         } else
 918                 list_for_each_entry(fmr, fmr_list, list)
 919                         mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
 920
 921         err = mthca_SYNC_TPT(mdev, &status);
 922         if (err)
 923                 return err;
 924         if (status)
 925                 return -EINVAL;
 926         return 0;
 927 }
 928
 929 static ssize_t show_rev(struct class_device *cdev, char *buf)
 930 {
 931         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
 932         return sprintf(buf, "%x\n", dev->rev_id);
 933 }
 934
 935 static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
 936 {
 937         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
 938         return sprintf(buf, "%x.%x.%x\n", (int) (dev->fw_ver >> 32),
 939                        (int) (dev->fw_ver >> 16) & 0xffff,
 940                        (int) dev->fw_ver & 0xffff);
 941 }
 942
 943 static ssize_t show_hca(struct class_device *cdev, char *buf)
 944 {
 945         struct mthca_dev *dev = container_of(cdev, struct mthca_dev, ib_dev.class_dev);
 946         switch (dev->pdev->device) {
 947         case PCI_DEVICE_ID_MELLANOX_TAVOR:
 948                 return sprintf(buf, "MT23108\n");
 949         case PCI_DEVICE_ID_MELLANOX_ARBEL_COMPAT:
 950                 return sprintf(buf, "MT25208 (MT23108 compat mode)\n");
 951         case PCI_DEVICE_ID_MELLANOX_ARBEL:
 952                 return sprintf(buf, "MT25208\n");
 953         case PCI_DEVICE_ID_MELLANOX_SINAI:
 954         case PCI_DEVICE_ID_MELLANOX_SINAI_OLD:
 955                 return sprintf(buf, "MT25204\n");
 956         default:
 957                 return sprintf(buf, "unknown\n");
 958         }
 959 }
 960
 961 static CLASS_DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
 962 static CLASS_DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
 963 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
 964
 965 static struct class_device_attribute *mthca_class_attributes[] = {
 966         &class_device_attr_hw_rev,
 967         &class_device_attr_fw_ver,
 968         &class_device_attr_hca_type
 969 };
 970
 971 int mthca_register_device(struct mthca_dev *dev)
 972 {
 973         int ret;
 974         int i;
 975
 976         strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
 977         dev->ib_dev.owner                = THIS_MODULE;
 978
 979         dev->ib_dev.node_type            = IB_NODE_CA;
 980         dev->ib_dev.phys_port_cnt        = dev->limits.num_ports;
 981         dev->ib_dev.dma_device           = &dev->pdev->dev;
 982         dev->ib_dev.class_dev.dev        = &dev->pdev->dev;
 983         dev->ib_dev.query_device         = mthca_query_device;
 984         dev->ib_dev.query_port           = mthca_query_port;
 985         dev->ib_dev.modify_port          = mthca_modify_port;
 986         dev->ib_dev.query_pkey           = mthca_query_pkey;
 987         dev->ib_dev.query_gid            = mthca_query_gid;
 988         dev->ib_dev.alloc_ucontext       = mthca_alloc_ucontext;
 989         dev->ib_dev.dealloc_ucontext     = mthca_dealloc_ucontext;
 990         dev->ib_dev.mmap                 = mthca_mmap_uar;
 991         dev->ib_dev.alloc_pd             = mthca_alloc_pd;
 992         dev->ib_dev.dealloc_pd           = mthca_dealloc_pd;
 993         dev->ib_dev.create_ah            = mthca_ah_create;
 994         dev->ib_dev.destroy_ah           = mthca_ah_destroy;
 995         dev->ib_dev.create_qp            = mthca_create_qp;
 996         dev->ib_dev.modify_qp            = mthca_modify_qp;
 997         dev->ib_dev.destroy_qp           = mthca_destroy_qp;
 998         dev->ib_dev.create_cq            = mthca_create_cq;
 999         dev->ib_dev.destroy_cq           = mthca_destroy_cq;
1000         dev->ib_dev.poll_cq              = mthca_poll_cq;
1001         dev->ib_dev.get_dma_mr           = mthca_get_dma_mr;
1002         dev->ib_dev.reg_phys_mr          = mthca_reg_phys_mr;
1003         dev->ib_dev.reg_user_mr          = mthca_reg_user_mr;
1004         dev->ib_dev.dereg_mr             = mthca_dereg_mr;
1005
1006         if (dev->mthca_flags & MTHCA_FLAG_FMR) {
1007                 dev->ib_dev.alloc_fmr            = mthca_alloc_fmr;
1008                 dev->ib_dev.unmap_fmr            = mthca_unmap_fmr;
1009                 dev->ib_dev.dealloc_fmr          = mthca_dealloc_fmr;
1010                 if (mthca_is_memfree(dev))
1011                         dev->ib_dev.map_phys_fmr = mthca_arbel_map_phys_fmr;
1012                 else
1013                         dev->ib_dev.map_phys_fmr = mthca_tavor_map_phys_fmr;
1014         }
1015
1016         dev->ib_dev.attach_mcast         = mthca_multicast_attach;
1017         dev->ib_dev.detach_mcast         = mthca_multicast_detach;
1018         dev->ib_dev.process_mad          = mthca_process_mad;
1019
1020         if (mthca_is_memfree(dev)) {
1021                 dev->ib_dev.req_notify_cq = mthca_arbel_arm_cq;
1022                 dev->ib_dev.post_send     = mthca_arbel_post_send;
1023                 dev->ib_dev.post_recv     = mthca_arbel_post_receive;
1024         } else {
1025                 dev->ib_dev.req_notify_cq = mthca_tavor_arm_cq;
1026                 dev->ib_dev.post_send     = mthca_tavor_post_send;
1027                 dev->ib_dev.post_recv     = mthca_tavor_post_receive;
1028         }
1029
1030         init_MUTEX(&dev->cap_mask_mutex);
1031
1032         ret = ib_register_device(&dev->ib_dev);
1033         if (ret)
1034                 return ret;
1035
1036         for (i = 0; i < ARRAY_SIZE(mthca_class_attributes); ++i) {
1037                 ret = class_device_create_file(&dev->ib_dev.class_dev,
1038                                                mthca_class_attributes[i]);
1039                 if (ret) {
1040                         ib_unregister_device(&dev->ib_dev);
1041                         return ret;
1042                 }
1043         }
1044
1045         return 0;
1046 }
1047
1048 void mthca_unregister_device(struct mthca_dev *dev)
1049 {
1050         ib_unregister_device(&dev->ib_dev);
1051 }