drivers/infiniband/hw/ipath/ipath_verbs.c

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