drivers/infiniband/hw/ipath/ipath_verbs.c

   1 /*
   2  * Copyright (c) 2006 QLogic, Inc. All rights reserved.
   3  * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <rdma/ib_mad.h>
  35 #include <rdma/ib_user_verbs.h>
  36 #include <linux/utsname.h>
  37
  38 #include "ipath_kernel.h"
  39 #include "ipath_verbs.h"
  40 #include "ips_common.h"
  41
  42 /* Not static, because we don't want the compiler removing it */
  43 const char ipath_verbs_version[] = "ipath_verbs " IPATH_IDSTR;
  44
  45 static unsigned int ib_ipath_qp_table_size = 251;
  46 module_param_named(qp_table_size, ib_ipath_qp_table_size, uint, S_IRUGO);
  47 MODULE_PARM_DESC(qp_table_size, "QP table size");
  48
  49 unsigned int ib_ipath_lkey_table_size = 12;
  50 module_param_named(lkey_table_size, ib_ipath_lkey_table_size, uint,
  51                    S_IRUGO);
  52 MODULE_PARM_DESC(lkey_table_size,
  53                  "LKEY table size in bits (2^n, 1 <= n <= 23)");
  54
  55 unsigned int ib_ipath_debug;    /* debug mask */
  56 module_param_named(debug, ib_ipath_debug, uint, S_IWUSR | S_IRUGO);
  57 MODULE_PARM_DESC(debug, "Verbs debug mask");
  58
  59 MODULE_LICENSE("GPL");
  60 MODULE_AUTHOR("QLogic <support@pathscale.com>");
  61 MODULE_DESCRIPTION("QLogic InfiniPath driver");
  62
  63 const int ib_ipath_state_ops[IB_QPS_ERR + 1] = {
  64         [IB_QPS_RESET] = 0,
  65         [IB_QPS_INIT] = IPATH_POST_RECV_OK,
  66         [IB_QPS_RTR] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
  67         [IB_QPS_RTS] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
  68             IPATH_POST_SEND_OK | IPATH_PROCESS_SEND_OK,
  69         [IB_QPS_SQD] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
  70             IPATH_POST_SEND_OK,
  71         [IB_QPS_SQE] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
  72         [IB_QPS_ERR] = 0,
  73 };
  74
  75 /*
  76  * Translate ib_wr_opcode into ib_wc_opcode.
  77  */
  78 const enum ib_wc_opcode ib_ipath_wc_opcode[] = {
  79         [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
  80         [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
  81         [IB_WR_SEND] = IB_WC_SEND,
  82         [IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
  83         [IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
  84         [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
  85         [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD
  86 };
  87
  88 /*
  89  * System image GUID.
  90  */
  91 static __be64 sys_image_guid;
  92
  93 /**
  94  * ipath_copy_sge - copy data to SGE memory
  95  * @ss: the SGE state
  96  * @data: the data to copy
  97  * @length: the length of the data
  98  */
  99 void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length)
 100 {
 101         struct ipath_sge *sge = &ss->sge;
 102
 103         while (length) {
 104                 u32 len = sge->length;
 105
 106                 BUG_ON(len == 0);
 107                 if (len > length)
 108                         len = length;
 109                 memcpy(sge->vaddr, data, len);
 110                 sge->vaddr += len;
 111                 sge->length -= len;
 112                 sge->sge_length -= len;
 113                 if (sge->sge_length == 0) {
 114                         if (--ss->num_sge)
 115                                 *sge = *ss->sg_list++;
 116                 } else if (sge->length == 0 && sge->mr != NULL) {
 117                         if (++sge->n >= IPATH_SEGSZ) {
 118                                 if (++sge->m >= sge->mr->mapsz)
 119                                         break;
 120                                 sge->n = 0;
 121                         }
 122                         sge->vaddr =
 123                                 sge->mr->map[sge->m]->segs[sge->n].vaddr;
 124                         sge->length =
 125                                 sge->mr->map[sge->m]->segs[sge->n].length;
 126                 }
 127                 data += len;
 128                 length -= len;
 129         }
 130 }
 131
 132 /**
 133  * ipath_skip_sge - skip over SGE memory - XXX almost dup of prev func
 134  * @ss: the SGE state
 135  * @length: the number of bytes to skip
 136  */
 137 void ipath_skip_sge(struct ipath_sge_state *ss, u32 length)
 138 {
 139         struct ipath_sge *sge = &ss->sge;
 140
 141         while (length > sge->sge_length) {
 142                 length -= sge->sge_length;
 143                 ss->sge = *ss->sg_list++;
 144         }
 145         while (length) {
 146                 u32 len = sge->length;
 147
 148                 BUG_ON(len == 0);
 149                 if (len > length)
 150                         len = length;
 151                 sge->vaddr += len;
 152                 sge->length -= len;
 153                 sge->sge_length -= len;
 154                 if (sge->sge_length == 0) {
 155                         if (--ss->num_sge)
 156                                 *sge = *ss->sg_list++;
 157                 } else if (sge->length == 0 && sge->mr != NULL) {
 158                         if (++sge->n >= IPATH_SEGSZ) {
 159                                 if (++sge->m >= sge->mr->mapsz)
 160                                         break;
 161                                 sge->n = 0;
 162                         }
 163                         sge->vaddr =
 164                                 sge->mr->map[sge->m]->segs[sge->n].vaddr;
 165                         sge->length =
 166                                 sge->mr->map[sge->m]->segs[sge->n].length;
 167                 }
 168                 length -= len;
 169         }
 170 }
 171
 172 /**
 173  * ipath_post_send - post a send on a QP
 174  * @ibqp: the QP to post the send on
 175  * @wr: the list of work requests to post
 176  * @bad_wr: the first bad WR is put here
 177  *
 178  * This may be called from interrupt context.
 179  */
 180 static int ipath_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 181                            struct ib_send_wr **bad_wr)
 182 {
 183         struct ipath_qp *qp = to_iqp(ibqp);
 184         int err = 0;
 185
 186         /* Check that state is OK to post send. */
 187         if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK)) {
 188                 *bad_wr = wr;
 189                 err = -EINVAL;
 190                 goto bail;
 191         }
 192
 193         for (; wr; wr = wr->next) {
 194                 switch (qp->ibqp.qp_type) {
 195                 case IB_QPT_UC:
 196                 case IB_QPT_RC:
 197                         err = ipath_post_ruc_send(qp, wr);
 198                         break;
 199
 200                 case IB_QPT_SMI:
 201                 case IB_QPT_GSI:
 202                 case IB_QPT_UD:
 203                         err = ipath_post_ud_send(qp, wr);
 204                         break;
 205
 206                 default:
 207                         err = -EINVAL;
 208                 }
 209                 if (err) {
 210                         *bad_wr = wr;
 211                         break;
 212                 }
 213         }
 214
 215 bail:
 216         return err;
 217 }
 218
 219 /**
 220  * ipath_post_receive - post a receive on a QP
 221  * @ibqp: the QP to post the receive on
 222  * @wr: the WR to post
 223  * @bad_wr: the first bad WR is put here
 224  *
 225  * This may be called from interrupt context.
 226  */
 227 static int ipath_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 228                               struct ib_recv_wr **bad_wr)
 229 {
 230         struct ipath_qp *qp = to_iqp(ibqp);
 231         unsigned long flags;
 232         int ret;
 233
 234         /* Check that state is OK to post receive. */
 235         if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_RECV_OK)) {
 236                 *bad_wr = wr;
 237                 ret = -EINVAL;
 238                 goto bail;
 239         }
 240
 241         for (; wr; wr = wr->next) {
 242                 struct ipath_rwqe *wqe;
 243                 u32 next;
 244                 int i, j;
 245
 246                 if (wr->num_sge > qp->r_rq.max_sge) {
 247                         *bad_wr = wr;
 248                         ret = -ENOMEM;
 249                         goto bail;
 250                 }
 251
 252                 spin_lock_irqsave(&qp->r_rq.lock, flags);
 253                 next = qp->r_rq.head + 1;
 254                 if (next >= qp->r_rq.size)
 255                         next = 0;
 256                 if (next == qp->r_rq.tail) {
 257                         spin_unlock_irqrestore(&qp->r_rq.lock, flags);
 258                         *bad_wr = wr;
 259                         ret = -ENOMEM;
 260                         goto bail;
 261                 }
 262
 263                 wqe = get_rwqe_ptr(&qp->r_rq, qp->r_rq.head);
 264                 wqe->wr_id = wr->wr_id;
 265                 wqe->sg_list[0].mr = NULL;
 266                 wqe->sg_list[0].vaddr = NULL;
 267                 wqe->sg_list[0].length = 0;
 268                 wqe->sg_list[0].sge_length = 0;
 269                 wqe->length = 0;
 270                 for (i = 0, j = 0; i < wr->num_sge; i++) {
 271                         /* Check LKEY */
 272                         if (to_ipd(qp->ibqp.pd)->user &&
 273                             wr->sg_list[i].lkey == 0) {
 274                                 spin_unlock_irqrestore(&qp->r_rq.lock,
 275                                                        flags);
 276                                 *bad_wr = wr;
 277                                 ret = -EINVAL;
 278                                 goto bail;
 279                         }
 280                         if (wr->sg_list[i].length == 0)
 281                                 continue;
 282                         if (!ipath_lkey_ok(
 283                                     &to_idev(qp->ibqp.device)->lk_table,
 284                                     &wqe->sg_list[j], &wr->sg_list[i],
 285                                     IB_ACCESS_LOCAL_WRITE)) {
 286                                 spin_unlock_irqrestore(&qp->r_rq.lock,
 287                                                        flags);
 288                                 *bad_wr = wr;
 289                                 ret = -EINVAL;
 290                                 goto bail;
 291                         }
 292                         wqe->length += wr->sg_list[i].length;
 293                         j++;
 294                 }
 295                 wqe->num_sge = j;
 296                 qp->r_rq.head = next;
 297                 spin_unlock_irqrestore(&qp->r_rq.lock, flags);
 298         }
 299         ret = 0;
 300
 301 bail:
 302         return ret;
 303 }
 304
 305 /**
 306  * ipath_qp_rcv - processing an incoming packet on a QP
 307  * @dev: the device the packet came on
 308  * @hdr: the packet header
 309  * @has_grh: true if the packet has a GRH
 310  * @data: the packet data
 311  * @tlen: the packet length
 312  * @qp: the QP the packet came on
 313  *
 314  * This is called from ipath_ib_rcv() to process an incoming packet
 315  * for the given QP.
 316  * Called at interrupt level.
 317  */
 318 static void ipath_qp_rcv(struct ipath_ibdev *dev,
 319                          struct ipath_ib_header *hdr, int has_grh,
 320                          void *data, u32 tlen, struct ipath_qp *qp)
 321 {
 322         /* Check for valid receive state. */
 323         if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_RECV_OK)) {
 324                 dev->n_pkt_drops++;
 325                 return;
 326         }
 327
 328         switch (qp->ibqp.qp_type) {
 329         case IB_QPT_SMI:
 330         case IB_QPT_GSI:
 331         case IB_QPT_UD:
 332                 ipath_ud_rcv(dev, hdr, has_grh, data, tlen, qp);
 333                 break;
 334
 335         case IB_QPT_RC:
 336                 ipath_rc_rcv(dev, hdr, has_grh, data, tlen, qp);
 337                 break;
 338
 339         case IB_QPT_UC:
 340                 ipath_uc_rcv(dev, hdr, has_grh, data, tlen, qp);
 341                 break;
 342
 343         default:
 344                 break;
 345         }
 346 }
 347
 348 /**
 349  * ipath_ib_rcv - process and incoming packet
 350  * @arg: the device pointer
 351  * @rhdr: the header of the packet
 352  * @data: the packet data
 353  * @tlen: the packet length
 354  *
 355  * This is called from ipath_kreceive() to process an incoming packet at
 356  * interrupt level. Tlen is the length of the header + data + CRC in bytes.
 357  */
 358 static void ipath_ib_rcv(void *arg, void *rhdr, void *data, u32 tlen)
 359 {
 360         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
 361         struct ipath_ib_header *hdr = rhdr;
 362         struct ipath_other_headers *ohdr;
 363         struct ipath_qp *qp;
 364         u32 qp_num;
 365         int lnh;
 366         u8 opcode;
 367         u16 lid;
 368
 369         if (unlikely(dev == NULL))
 370                 goto bail;
 371
 372         if (unlikely(tlen < 24)) {      /* LRH+BTH+CRC */
 373                 dev->rcv_errors++;
 374                 goto bail;
 375         }
 376
 377         /* Check for a valid destination LID (see ch. 7.11.1). */
 378         lid = be16_to_cpu(hdr->lrh[1]);
 379         if (lid < IPS_MULTICAST_LID_BASE) {
 380                 lid &= ~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
 381                 if (unlikely(lid != ipath_layer_get_lid(dev->dd))) {
 382                         dev->rcv_errors++;
 383                         goto bail;
 384                 }
 385         }
 386
 387         /* Check for GRH */
 388         lnh = be16_to_cpu(hdr->lrh[0]) & 3;
 389         if (lnh == IPS_LRH_BTH)
 390                 ohdr = &hdr->u.oth;
 391         else if (lnh == IPS_LRH_GRH)
 392                 ohdr = &hdr->u.l.oth;
 393         else {
 394                 dev->rcv_errors++;
 395                 goto bail;
 396         }
 397
 398         opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
 399         dev->opstats[opcode].n_bytes += tlen;
 400         dev->opstats[opcode].n_packets++;
 401
 402         /* Get the destination QP number. */
 403         qp_num = be32_to_cpu(ohdr->bth[1]) & IPS_QPN_MASK;
 404         if (qp_num == IPS_MULTICAST_QPN) {
 405                 struct ipath_mcast *mcast;
 406                 struct ipath_mcast_qp *p;
 407
 408                 mcast = ipath_mcast_find(&hdr->u.l.grh.dgid);
 409                 if (mcast == NULL) {
 410                         dev->n_pkt_drops++;
 411                         goto bail;
 412                 }
 413                 dev->n_multicast_rcv++;
 414                 list_for_each_entry_rcu(p, &mcast->qp_list, list)
 415                         ipath_qp_rcv(dev, hdr, lnh == IPS_LRH_GRH, data,
 416                                      tlen, p->qp);
 417                 /*
 418                  * Notify ipath_multicast_detach() if it is waiting for us
 419                  * to finish.
 420                  */
 421                 if (atomic_dec_return(&mcast->refcount) <= 1)
 422                         wake_up(&mcast->wait);
 423         } else {
 424                 qp = ipath_lookup_qpn(&dev->qp_table, qp_num);
 425                 if (qp) {
 426                         dev->n_unicast_rcv++;
 427                         ipath_qp_rcv(dev, hdr, lnh == IPS_LRH_GRH, data,
 428                                      tlen, qp);
 429                         /*
 430                          * Notify ipath_destroy_qp() if it is waiting
 431                          * for us to finish.
 432                          */
 433                         if (atomic_dec_and_test(&qp->refcount))
 434                                 wake_up(&qp->wait);
 435                 } else
 436                         dev->n_pkt_drops++;
 437         }
 438
 439 bail:;
 440 }
 441
 442 /**
 443  * ipath_ib_timer - verbs timer
 444  * @arg: the device pointer
 445  *
 446  * This is called from ipath_do_rcv_timer() at interrupt level to check for
 447  * QPs which need retransmits and to collect performance numbers.
 448  */
 449 static void ipath_ib_timer(void *arg)
 450 {
 451         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
 452         struct ipath_qp *resend = NULL;
 453         struct list_head *last;
 454         struct ipath_qp *qp;
 455         unsigned long flags;
 456
 457         if (dev == NULL)
 458                 return;
 459
 460         spin_lock_irqsave(&dev->pending_lock, flags);
 461         /* Start filling the next pending queue. */
 462         if (++dev->pending_index >= ARRAY_SIZE(dev->pending))
 463                 dev->pending_index = 0;
 464         /* Save any requests still in the new queue, they have timed out. */
 465         last = &dev->pending[dev->pending_index];
 466         while (!list_empty(last)) {
 467                 qp = list_entry(last->next, struct ipath_qp, timerwait);
 468                 list_del_init(&qp->timerwait);
 469                 qp->timer_next = resend;
 470                 resend = qp;
 471                 atomic_inc(&qp->refcount);
 472         }
 473         last = &dev->rnrwait;
 474         if (!list_empty(last)) {
 475                 qp = list_entry(last->next, struct ipath_qp, timerwait);
 476                 if (--qp->s_rnr_timeout == 0) {
 477                         do {
 478                                 list_del_init(&qp->timerwait);
 479                                 tasklet_hi_schedule(&qp->s_task);
 480                                 if (list_empty(last))
 481                                         break;
 482                                 qp = list_entry(last->next, struct ipath_qp,
 483                                                 timerwait);
 484                         } while (qp->s_rnr_timeout == 0);
 485                 }
 486         }
 487         /*
 488          * We should only be in the started state if pma_sample_start != 0
 489          */
 490         if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_STARTED &&
 491             --dev->pma_sample_start == 0) {
 492                 dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_RUNNING;
 493                 ipath_layer_snapshot_counters(dev->dd, &dev->ipath_sword,
 494                                               &dev->ipath_rword,
 495                                               &dev->ipath_spkts,
 496                                               &dev->ipath_rpkts,
 497                                               &dev->ipath_xmit_wait);
 498         }
 499         if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_RUNNING) {
 500                 if (dev->pma_sample_interval == 0) {
 501                         u64 ta, tb, tc, td, te;
 502
 503                         dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_DONE;
 504                         ipath_layer_snapshot_counters(dev->dd, &ta, &tb,
 505                                                       &tc, &td, &te);
 506
 507                         dev->ipath_sword = ta - dev->ipath_sword;
 508                         dev->ipath_rword = tb - dev->ipath_rword;
 509                         dev->ipath_spkts = tc - dev->ipath_spkts;
 510                         dev->ipath_rpkts = td - dev->ipath_rpkts;
 511                         dev->ipath_xmit_wait = te - dev->ipath_xmit_wait;
 512                 }
 513                 else
 514                         dev->pma_sample_interval--;
 515         }
 516         spin_unlock_irqrestore(&dev->pending_lock, flags);
 517
 518         /* XXX What if timer fires again while this is running? */
 519         for (qp = resend; qp != NULL; qp = qp->timer_next) {
 520                 struct ib_wc wc;
 521
 522                 spin_lock_irqsave(&qp->s_lock, flags);
 523                 if (qp->s_last != qp->s_tail && qp->state == IB_QPS_RTS) {
 524                         dev->n_timeouts++;
 525                         ipath_restart_rc(qp, qp->s_last_psn + 1, &wc);
 526                 }
 527                 spin_unlock_irqrestore(&qp->s_lock, flags);
 528
 529                 /* Notify ipath_destroy_qp() if it is waiting. */
 530                 if (atomic_dec_and_test(&qp->refcount))
 531                         wake_up(&qp->wait);
 532         }
 533 }
 534
 535 /**
 536  * ipath_ib_piobufavail - callback when a PIO buffer is available
 537  * @arg: the device pointer
 538  *
 539  * This is called from ipath_intr() at interrupt level when a PIO buffer is
 540  * available after ipath_verbs_send() returned an error that no buffers were
 541  * available.  Return 1 if we consumed all the PIO buffers and we still have
 542  * QPs waiting for buffers (for now, just do a tasklet_hi_schedule and
 543  * return zero).
 544  */
 545 static int ipath_ib_piobufavail(void *arg)
 546 {
 547         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
 548         struct ipath_qp *qp;
 549         unsigned long flags;
 550
 551         if (dev == NULL)
 552                 goto bail;
 553
 554         spin_lock_irqsave(&dev->pending_lock, flags);
 555         while (!list_empty(&dev->piowait)) {
 556                 qp = list_entry(dev->piowait.next, struct ipath_qp,
 557                                 piowait);
 558                 list_del_init(&qp->piowait);
 559                 tasklet_hi_schedule(&qp->s_task);
 560         }
 561         spin_unlock_irqrestore(&dev->pending_lock, flags);
 562
 563 bail:
 564         return 0;
 565 }
 566
 567 static int ipath_query_device(struct ib_device *ibdev,
 568                               struct ib_device_attr *props)
 569 {
 570         struct ipath_ibdev *dev = to_idev(ibdev);
 571         u32 vendor, boardrev, majrev, minrev;
 572
 573         memset(props, 0, sizeof(*props));
 574
 575         props->device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
 576                 IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
 577                 IB_DEVICE_SYS_IMAGE_GUID;
 578         ipath_layer_query_device(dev->dd, &vendor, &boardrev,
 579                                  &majrev, &minrev);
 580         props->vendor_id = vendor;
 581         props->vendor_part_id = boardrev;
 582         props->hw_ver = boardrev << 16 | majrev << 8 | minrev;
 583
 584         props->sys_image_guid = dev->sys_image_guid;
 585
 586         props->max_mr_size = ~0ull;
 587         props->max_qp = 0xffff;
 588         props->max_qp_wr = 0xffff;
 589         props->max_sge = 255;
 590         props->max_cq = 0xffff;
 591         props->max_cqe = 0xffff;
 592         props->max_mr = 0xffff;
 593         props->max_pd = 0xffff;
 594         props->max_qp_rd_atom = 1;
 595         props->max_qp_init_rd_atom = 1;
 596         /* props->max_res_rd_atom */
 597         props->max_srq = 0xffff;
 598         props->max_srq_wr = 0xffff;
 599         props->max_srq_sge = 255;
 600         /* props->local_ca_ack_delay */
 601         props->atomic_cap = IB_ATOMIC_HCA;
 602         props->max_pkeys = ipath_layer_get_npkeys(dev->dd);
 603         props->max_mcast_grp = 0xffff;
 604         props->max_mcast_qp_attach = 0xffff;
 605         props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 606                 props->max_mcast_grp;
 607
 608         return 0;
 609 }
 610
 611 const u8 ipath_cvt_physportstate[16] = {
 612         [INFINIPATH_IBCS_LT_STATE_DISABLED] = 3,
 613         [INFINIPATH_IBCS_LT_STATE_LINKUP] = 5,
 614         [INFINIPATH_IBCS_LT_STATE_POLLACTIVE] = 2,
 615         [INFINIPATH_IBCS_LT_STATE_POLLQUIET] = 2,
 616         [INFINIPATH_IBCS_LT_STATE_SLEEPDELAY] = 1,
 617         [INFINIPATH_IBCS_LT_STATE_SLEEPQUIET] = 1,
 618         [INFINIPATH_IBCS_LT_STATE_CFGDEBOUNCE] = 4,
 619         [INFINIPATH_IBCS_LT_STATE_CFGRCVFCFG] = 4,
 620         [INFINIPATH_IBCS_LT_STATE_CFGWAITRMT] = 4,
 621         [INFINIPATH_IBCS_LT_STATE_CFGIDLE] = 4,
 622         [INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN] = 6,
 623         [INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT] = 6,
 624         [INFINIPATH_IBCS_LT_STATE_RECOVERIDLE] = 6,
 625 };
 626
 627 static int ipath_query_port(struct ib_device *ibdev,
 628                             u8 port, struct ib_port_attr *props)
 629 {
 630         struct ipath_ibdev *dev = to_idev(ibdev);
 631         enum ib_mtu mtu;
 632         u16 lid = ipath_layer_get_lid(dev->dd);
 633         u64 ibcstat;
 634
 635         memset(props, 0, sizeof(*props));
 636         props->lid = lid ? lid : __constant_be16_to_cpu(IB_LID_PERMISSIVE);
 637         props->lmc = dev->mkeyprot_resv_lmc & 7;
 638         props->sm_lid = dev->sm_lid;
 639         props->sm_sl = dev->sm_sl;
 640         ibcstat = ipath_layer_get_lastibcstat(dev->dd);
 641         props->state = ((ibcstat >> 4) & 0x3) + 1;
 642         /* See phys_state_show() */
 643         props->phys_state = ipath_cvt_physportstate[
 644                 ipath_layer_get_lastibcstat(dev->dd) & 0xf];
 645         props->port_cap_flags = dev->port_cap_flags;
 646         props->gid_tbl_len = 1;
 647         props->max_msg_sz = 4096;
 648         props->pkey_tbl_len = ipath_layer_get_npkeys(dev->dd);
 649         props->bad_pkey_cntr = ipath_layer_get_cr_errpkey(dev->dd) -
 650                 dev->z_pkey_violations;
 651         props->qkey_viol_cntr = dev->qkey_violations;
 652         props->active_width = IB_WIDTH_4X;
 653         /* See rate_show() */
 654         props->active_speed = 1;        /* Regular 10Mbs speed. */
 655         props->max_vl_num = 1;          /* VLCap = VL0 */
 656         props->init_type_reply = 0;
 657
 658         props->max_mtu = IB_MTU_4096;
 659         switch (ipath_layer_get_ibmtu(dev->dd)) {
 660         case 4096:
 661                 mtu = IB_MTU_4096;
 662                 break;
 663         case 2048:
 664                 mtu = IB_MTU_2048;
 665                 break;
 666         case 1024:
 667                 mtu = IB_MTU_1024;
 668                 break;
 669         case 512:
 670                 mtu = IB_MTU_512;
 671                 break;
 672         case 256:
 673                 mtu = IB_MTU_256;
 674                 break;
 675         default:
 676                 mtu = IB_MTU_2048;
 677         }
 678         props->active_mtu = mtu;
 679         props->subnet_timeout = dev->subnet_timeout;
 680
 681         return 0;
 682 }
 683
 684 static int ipath_modify_device(struct ib_device *device,
 685                                int device_modify_mask,
 686                                struct ib_device_modify *device_modify)
 687 {
 688         int ret;
 689
 690         if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
 691                                    IB_DEVICE_MODIFY_NODE_DESC)) {
 692                 ret = -EOPNOTSUPP;
 693                 goto bail;
 694         }
 695
 696         if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC)
 697                 memcpy(device->node_desc, device_modify->node_desc, 64);
 698
 699         if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
 700                 to_idev(device)->sys_image_guid =
 701                         cpu_to_be64(device_modify->sys_image_guid);
 702
 703         ret = 0;
 704
 705 bail:
 706         return ret;
 707 }
 708
 709 static int ipath_modify_port(struct ib_device *ibdev,
 710                              u8 port, int port_modify_mask,
 711                              struct ib_port_modify *props)
 712 {
 713         struct ipath_ibdev *dev = to_idev(ibdev);
 714
 715         dev->port_cap_flags |= props->set_port_cap_mask;
 716         dev->port_cap_flags &= ~props->clr_port_cap_mask;
 717         if (port_modify_mask & IB_PORT_SHUTDOWN)
 718                 ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKDOWN);
 719         if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
 720                 dev->qkey_violations = 0;
 721         return 0;
 722 }
 723
 724 static int ipath_query_gid(struct ib_device *ibdev, u8 port,
 725                            int index, union ib_gid *gid)
 726 {
 727         struct ipath_ibdev *dev = to_idev(ibdev);
 728         int ret;
 729
 730         if (index >= 1) {
 731                 ret = -EINVAL;
 732                 goto bail;
 733         }
 734         gid->global.subnet_prefix = dev->gid_prefix;
 735         gid->global.interface_id = ipath_layer_get_guid(dev->dd);
 736
 737         ret = 0;
 738
 739 bail:
 740         return ret;
 741 }
 742
 743 static struct ib_pd *ipath_alloc_pd(struct ib_device *ibdev,
 744                                     struct ib_ucontext *context,
 745                                     struct ib_udata *udata)
 746 {
 747         struct ipath_pd *pd;
 748         struct ib_pd *ret;
 749
 750         pd = kmalloc(sizeof *pd, GFP_KERNEL);
 751         if (!pd) {
 752                 ret = ERR_PTR(-ENOMEM);
 753                 goto bail;
 754         }
 755
 756         /* ib_alloc_pd() will initialize pd->ibpd. */
 757         pd->user = udata != NULL;
 758
 759         ret = &pd->ibpd;
 760
 761 bail:
 762         return ret;
 763 }
 764
 765 static int ipath_dealloc_pd(struct ib_pd *ibpd)
 766 {
 767         struct ipath_pd *pd = to_ipd(ibpd);
 768
 769         kfree(pd);
 770
 771         return 0;
 772 }
 773
 774 /**
 775  * ipath_create_ah - create an address handle
 776  * @pd: the protection domain
 777  * @ah_attr: the attributes of the AH
 778  *
 779  * This may be called from interrupt context.
 780  */
 781 static struct ib_ah *ipath_create_ah(struct ib_pd *pd,
 782                                      struct ib_ah_attr *ah_attr)
 783 {
 784         struct ipath_ah *ah;
 785         struct ib_ah *ret;
 786
 787         /* A multicast address requires a GRH (see ch. 8.4.1). */
 788         if (ah_attr->dlid >= IPS_MULTICAST_LID_BASE &&
 789             ah_attr->dlid != IPS_PERMISSIVE_LID &&
 790             !(ah_attr->ah_flags & IB_AH_GRH)) {
 791                 ret = ERR_PTR(-EINVAL);
 792                 goto bail;
 793         }
 794
 795         ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 796         if (!ah) {
 797                 ret = ERR_PTR(-ENOMEM);
 798                 goto bail;
 799         }
 800
 801         /* ib_create_ah() will initialize ah->ibah. */
 802         ah->attr = *ah_attr;
 803
 804         ret = &ah->ibah;
 805
 806 bail:
 807         return ret;
 808 }
 809
 810 /**
 811  * ipath_destroy_ah - destroy an address handle
 812  * @ibah: the AH to destroy
 813  *
 814  * This may be called from interrupt context.
 815  */
 816 static int ipath_destroy_ah(struct ib_ah *ibah)
 817 {
 818         struct ipath_ah *ah = to_iah(ibah);
 819
 820         kfree(ah);
 821
 822         return 0;
 823 }
 824
 825 static int ipath_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
 826 {
 827         struct ipath_ah *ah = to_iah(ibah);
 828
 829         *ah_attr = ah->attr;
 830
 831         return 0;
 832 }
 833
 834 static int ipath_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 835                             u16 *pkey)
 836 {
 837         struct ipath_ibdev *dev = to_idev(ibdev);
 838         int ret;
 839
 840         if (index >= ipath_layer_get_npkeys(dev->dd)) {
 841                 ret = -EINVAL;
 842                 goto bail;
 843         }
 844
 845         *pkey = ipath_layer_get_pkey(dev->dd, index);
 846         ret = 0;
 847
 848 bail:
 849         return ret;
 850 }
 851
 852
 853 /**
 854  * ipath_alloc_ucontext - allocate a ucontest
 855  * @ibdev: the infiniband device
 856  * @udata: not used by the InfiniPath driver
 857  */
 858
 859 static struct ib_ucontext *ipath_alloc_ucontext(struct ib_device *ibdev,
 860                                                 struct ib_udata *udata)
 861 {
 862         struct ipath_ucontext *context;
 863         struct ib_ucontext *ret;
 864
 865         context = kmalloc(sizeof *context, GFP_KERNEL);
 866         if (!context) {
 867                 ret = ERR_PTR(-ENOMEM);
 868                 goto bail;
 869         }
 870
 871         ret = &context->ibucontext;
 872
 873 bail:
 874         return ret;
 875 }
 876
 877 static int ipath_dealloc_ucontext(struct ib_ucontext *context)
 878 {
 879         kfree(to_iucontext(context));
 880         return 0;
 881 }
 882
 883 static int ipath_verbs_register_sysfs(struct ib_device *dev);
 884
 885 /**
 886  * ipath_register_ib_device - register our device with the infiniband core
 887  * @unit: the device number to register
 888  * @dd: the device data structure
 889  * Return the allocated ipath_ibdev pointer or NULL on error.
 890  */
 891 static void *ipath_register_ib_device(int unit, struct ipath_devdata *dd)
 892 {
 893         struct ipath_ibdev *idev;
 894         struct ib_device *dev;
 895         int ret;
 896
 897         idev = (struct ipath_ibdev *)ib_alloc_device(sizeof *idev);
 898         if (idev == NULL)
 899                 goto bail;
 900
 901         dev = &idev->ibdev;
 902
 903         /* Only need to initialize non-zero fields. */
 904         spin_lock_init(&idev->qp_table.lock);
 905         spin_lock_init(&idev->lk_table.lock);
 906         idev->sm_lid = __constant_be16_to_cpu(IB_LID_PERMISSIVE);
 907         /* Set the prefix to the default value (see ch. 4.1.1) */
 908         idev->gid_prefix = __constant_cpu_to_be64(0xfe80000000000000ULL);
 909
 910         ret = ipath_init_qp_table(idev, ib_ipath_qp_table_size);
 911         if (ret)
 912                 goto err_qp;
 913
 914         /*
 915          * The top ib_ipath_lkey_table_size bits are used to index the
 916          * table.  The lower 8 bits can be owned by the user (copied from
 917          * the LKEY).  The remaining bits act as a generation number or tag.
 918          */
 919         idev->lk_table.max = 1 << ib_ipath_lkey_table_size;
 920         idev->lk_table.table = kzalloc(idev->lk_table.max *
 921                                        sizeof(*idev->lk_table.table),
 922                                        GFP_KERNEL);
 923         if (idev->lk_table.table == NULL) {
 924                 ret = -ENOMEM;
 925                 goto err_lk;
 926         }
 927         spin_lock_init(&idev->pending_lock);
 928         INIT_LIST_HEAD(&idev->pending[0]);
 929         INIT_LIST_HEAD(&idev->pending[1]);
 930         INIT_LIST_HEAD(&idev->pending[2]);
 931         INIT_LIST_HEAD(&idev->piowait);
 932         INIT_LIST_HEAD(&idev->rnrwait);
 933         idev->pending_index = 0;
 934         idev->port_cap_flags =
 935                 IB_PORT_SYS_IMAGE_GUID_SUP | IB_PORT_CLIENT_REG_SUP;
 936         idev->pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
 937         idev->pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
 938         idev->pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
 939         idev->pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
 940         idev->pma_counter_select[5] = IB_PMA_PORT_XMIT_WAIT;
 941         idev->link_width_enabled = 3;   /* 1x or 4x */
 942
 943         /*
 944          * The system image GUID is supposed to be the same for all
 945          * IB HCAs in a single system but since there can be other
 946          * device types in the system, we can't be sure this is unique.
 947          */
 948         if (!sys_image_guid)
 949                 sys_image_guid = ipath_layer_get_guid(dd);
 950         idev->sys_image_guid = sys_image_guid;
 951         idev->ib_unit = unit;
 952         idev->dd = dd;
 953
 954         strlcpy(dev->name, "ipath%d", IB_DEVICE_NAME_MAX);
 955         dev->owner = THIS_MODULE;
 956         dev->node_guid = ipath_layer_get_guid(dd);
 957         dev->uverbs_abi_ver = IPATH_UVERBS_ABI_VERSION;
 958         dev->uverbs_cmd_mask =
 959                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 960                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 961                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 962                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 963                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 964                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 965                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH)          |
 966                 (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
 967                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 968                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 969                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 970                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 971                 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
 972                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 973                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
 974                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
 975                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 976                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 977                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 978                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 979                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
 980                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
 981                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 982                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
 983                 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
 984                 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
 985                 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
 986                 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
 987                 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
 988         dev->node_type = IB_NODE_CA;
 989         dev->phys_port_cnt = 1;
 990         dev->dma_device = ipath_layer_get_device(dd);
 991         dev->class_dev.dev = dev->dma_device;
 992         dev->query_device = ipath_query_device;
 993         dev->modify_device = ipath_modify_device;
 994         dev->query_port = ipath_query_port;
 995         dev->modify_port = ipath_modify_port;
 996         dev->query_pkey = ipath_query_pkey;
 997         dev->query_gid = ipath_query_gid;
 998         dev->alloc_ucontext = ipath_alloc_ucontext;
 999         dev->dealloc_ucontext = ipath_dealloc_ucontext;
1000         dev->alloc_pd = ipath_alloc_pd;
1001         dev->dealloc_pd = ipath_dealloc_pd;
1002         dev->create_ah = ipath_create_ah;
1003         dev->destroy_ah = ipath_destroy_ah;
1004         dev->query_ah = ipath_query_ah;
1005         dev->create_srq = ipath_create_srq;
1006         dev->modify_srq = ipath_modify_srq;
1007         dev->query_srq = ipath_query_srq;
1008         dev->destroy_srq = ipath_destroy_srq;
1009         dev->create_qp = ipath_create_qp;
1010         dev->modify_qp = ipath_modify_qp;
1011         dev->query_qp = ipath_query_qp;
1012         dev->destroy_qp = ipath_destroy_qp;
1013         dev->post_send = ipath_post_send;
1014         dev->post_recv = ipath_post_receive;
1015         dev->post_srq_recv = ipath_post_srq_receive;
1016         dev->create_cq = ipath_create_cq;
1017         dev->destroy_cq = ipath_destroy_cq;
1018         dev->resize_cq = ipath_resize_cq;
1019         dev->poll_cq = ipath_poll_cq;
1020         dev->req_notify_cq = ipath_req_notify_cq;
1021         dev->get_dma_mr = ipath_get_dma_mr;
1022         dev->reg_phys_mr = ipath_reg_phys_mr;
1023         dev->reg_user_mr = ipath_reg_user_mr;
1024         dev->dereg_mr = ipath_dereg_mr;
1025         dev->alloc_fmr = ipath_alloc_fmr;
1026         dev->map_phys_fmr = ipath_map_phys_fmr;
1027         dev->unmap_fmr = ipath_unmap_fmr;
1028         dev->dealloc_fmr = ipath_dealloc_fmr;
1029         dev->attach_mcast = ipath_multicast_attach;
1030         dev->detach_mcast = ipath_multicast_detach;
1031         dev->process_mad = ipath_process_mad;
1032
1033         snprintf(dev->node_desc, sizeof(dev->node_desc),
1034                  IPATH_IDSTR " %s kernel_SMA", system_utsname.nodename);
1035
1036         ret = ib_register_device(dev);
1037         if (ret)
1038                 goto err_reg;
1039
1040         if (ipath_verbs_register_sysfs(dev))
1041                 goto err_class;
1042
1043         ipath_layer_enable_timer(dd);
1044
1045         goto bail;
1046
1047 err_class:
1048         ib_unregister_device(dev);
1049 err_reg:
1050         kfree(idev->lk_table.table);
1051 err_lk:
1052         kfree(idev->qp_table.table);
1053 err_qp:
1054         ib_dealloc_device(dev);
1055         _VERBS_ERROR("ib_ipath%d cannot register verbs (%d)!\n",
1056                      unit, -ret);
1057         idev = NULL;
1058
1059 bail:
1060         return idev;
1061 }
1062
1063 static void ipath_unregister_ib_device(void *arg)
1064 {
1065         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
1066         struct ib_device *ibdev = &dev->ibdev;
1067
1068         ipath_layer_disable_timer(dev->dd);
1069
1070         ib_unregister_device(ibdev);
1071
1072         if (!list_empty(&dev->pending[0]) ||
1073             !list_empty(&dev->pending[1]) ||
1074             !list_empty(&dev->pending[2]))
1075                 _VERBS_ERROR("ipath%d pending list not empty!\n",
1076                              dev->ib_unit);
1077         if (!list_empty(&dev->piowait))
1078                 _VERBS_ERROR("ipath%d piowait list not empty!\n",
1079                              dev->ib_unit);
1080         if (!list_empty(&dev->rnrwait))
1081                 _VERBS_ERROR("ipath%d rnrwait list not empty!\n",
1082                              dev->ib_unit);
1083         if (!ipath_mcast_tree_empty())
1084                 _VERBS_ERROR("ipath%d multicast table memory leak!\n",
1085                              dev->ib_unit);
1086         /*
1087          * Note that ipath_unregister_ib_device() can be called before all
1088          * the QPs are destroyed!
1089          */
1090         ipath_free_all_qps(&dev->qp_table);
1091         kfree(dev->qp_table.table);
1092         kfree(dev->lk_table.table);
1093         ib_dealloc_device(ibdev);
1094 }
1095
1096 static int __init ipath_verbs_init(void)
1097 {
1098         return ipath_verbs_register(ipath_register_ib_device,
1099                                     ipath_unregister_ib_device,
1100                                     ipath_ib_piobufavail, ipath_ib_rcv,
1101                                     ipath_ib_timer);
1102 }
1103
1104 static void __exit ipath_verbs_cleanup(void)
1105 {
1106         ipath_verbs_unregister();
1107 }
1108
1109 static ssize_t show_rev(struct class_device *cdev, char *buf)
1110 {
1111         struct ipath_ibdev *dev =
1112                 container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
1113         int vendor, boardrev, majrev, minrev;
1114
1115         ipath_layer_query_device(dev->dd, &vendor, &boardrev,
1116                                  &majrev, &minrev);
1117         return sprintf(buf, "%d.%d\n", majrev, minrev);
1118 }
1119
1120 static ssize_t show_hca(struct class_device *cdev, char *buf)
1121 {
1122         struct ipath_ibdev *dev =
1123                 container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
1124         int ret;
1125
1126         ret = ipath_layer_get_boardname(dev->dd, buf, 128);
1127         if (ret < 0)
1128                 goto bail;
1129         strcat(buf, "\n");
1130         ret = strlen(buf);
1131
1132 bail:
1133         return ret;
1134 }
1135
1136 static ssize_t show_stats(struct class_device *cdev, char *buf)
1137 {
1138         struct ipath_ibdev *dev =
1139                 container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
1140         int i;
1141         int len;
1142
1143         len = sprintf(buf,
1144                       "RC resends  %d\n"
1145                       "RC no QACK  %d\n"
1146                       "RC ACKs     %d\n"
1147                       "RC SEQ NAKs %d\n"
1148                       "RC RDMA seq %d\n"
1149                       "RC RNR NAKs %d\n"
1150                       "RC OTH NAKs %d\n"
1151                       "RC timeouts %d\n"
1152                       "RC RDMA dup %d\n"
1153                       "piobuf wait %d\n"
1154                       "no piobuf   %d\n"
1155                       "PKT drops   %d\n"
1156                       "WQE errs    %d\n",
1157                       dev->n_rc_resends, dev->n_rc_qacks, dev->n_rc_acks,
1158                       dev->n_seq_naks, dev->n_rdma_seq, dev->n_rnr_naks,
1159                       dev->n_other_naks, dev->n_timeouts,
1160                       dev->n_rdma_dup_busy, dev->n_piowait,
1161                       dev->n_no_piobuf, dev->n_pkt_drops, dev->n_wqe_errs);
1162         for (i = 0; i < ARRAY_SIZE(dev->opstats); i++) {
1163                 const struct ipath_opcode_stats *si = &dev->opstats[i];
1164
1165                 if (!si->n_packets && !si->n_bytes)
1166                         continue;
1167                 len += sprintf(buf + len, "%02x %llu/%llu\n", i,
1168                                (unsigned long long) si->n_packets,
1169                                (unsigned long long) si->n_bytes);
1170         }
1171         return len;
1172 }
1173
1174 static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1175 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1176 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
1177 static CLASS_DEVICE_ATTR(stats, S_IRUGO, show_stats, NULL);
1178
1179 static struct class_device_attribute *ipath_class_attributes[] = {
1180         &class_device_attr_hw_rev,
1181         &class_device_attr_hca_type,
1182         &class_device_attr_board_id,
1183         &class_device_attr_stats
1184 };
1185
1186 static int ipath_verbs_register_sysfs(struct ib_device *dev)
1187 {
1188         int i;
1189         int ret;
1190
1191         for (i = 0; i < ARRAY_SIZE(ipath_class_attributes); ++i)
1192                 if (class_device_create_file(&dev->class_dev,
1193                                              ipath_class_attributes[i])) {
1194                         ret = 1;
1195                         goto bail;
1196                 }
1197
1198         ret = 0;
1199
1200 bail:
1201         return ret;
1202 }
1203
1204 module_init(ipath_verbs_init);
1205 module_exit(ipath_verbs_cleanup);