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 ipath_qp *rnr = 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                 if (last->next == LIST_POISON1 ||
 469                     last->next != &qp->timerwait ||
 470                     qp->timerwait.prev != last) {
 471                         INIT_LIST_HEAD(last);
 472                 } else {
 473                         list_del(&qp->timerwait);
 474                         qp->timerwait.prev = (struct list_head *) resend;
 475                         resend = qp;
 476                         atomic_inc(&qp->refcount);
 477                 }
 478         }
 479         last = &dev->rnrwait;
 480         if (!list_empty(last)) {
 481                 qp = list_entry(last->next, struct ipath_qp, timerwait);
 482                 if (--qp->s_rnr_timeout == 0) {
 483                         do {
 484                                 if (last->next == LIST_POISON1 ||
 485                                     last->next != &qp->timerwait ||
 486                                     qp->timerwait.prev != last) {
 487                                         INIT_LIST_HEAD(last);
 488                                         break;
 489                                 }
 490                                 list_del(&qp->timerwait);
 491                                 qp->timerwait.prev =
 492                                         (struct list_head *) rnr;
 493                                 rnr = qp;
 494                                 if (list_empty(last))
 495                                         break;
 496                                 qp = list_entry(last->next, struct ipath_qp,
 497                                                 timerwait);
 498                         } while (qp->s_rnr_timeout == 0);
 499                 }
 500         }
 501         /*
 502          * We should only be in the started state if pma_sample_start != 0
 503          */
 504         if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_STARTED &&
 505             --dev->pma_sample_start == 0) {
 506                 dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_RUNNING;
 507                 ipath_layer_snapshot_counters(dev->dd, &dev->ipath_sword,
 508                                               &dev->ipath_rword,
 509                                               &dev->ipath_spkts,
 510                                               &dev->ipath_rpkts,
 511                                               &dev->ipath_xmit_wait);
 512         }
 513         if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_RUNNING) {
 514                 if (dev->pma_sample_interval == 0) {
 515                         u64 ta, tb, tc, td, te;
 516
 517                         dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_DONE;
 518                         ipath_layer_snapshot_counters(dev->dd, &ta, &tb,
 519                                                       &tc, &td, &te);
 520
 521                         dev->ipath_sword = ta - dev->ipath_sword;
 522                         dev->ipath_rword = tb - dev->ipath_rword;
 523                         dev->ipath_spkts = tc - dev->ipath_spkts;
 524                         dev->ipath_rpkts = td - dev->ipath_rpkts;
 525                         dev->ipath_xmit_wait = te - dev->ipath_xmit_wait;
 526                 }
 527                 else
 528                         dev->pma_sample_interval--;
 529         }
 530         spin_unlock_irqrestore(&dev->pending_lock, flags);
 531
 532         /* XXX What if timer fires again while this is running? */
 533         for (qp = resend; qp != NULL;
 534              qp = (struct ipath_qp *) qp->timerwait.prev) {
 535                 struct ib_wc wc;
 536
 537                 spin_lock_irqsave(&qp->s_lock, flags);
 538                 if (qp->s_last != qp->s_tail && qp->state == IB_QPS_RTS) {
 539                         dev->n_timeouts++;
 540                         ipath_restart_rc(qp, qp->s_last_psn + 1, &wc);
 541                 }
 542                 spin_unlock_irqrestore(&qp->s_lock, flags);
 543
 544                 /* Notify ipath_destroy_qp() if it is waiting. */
 545                 if (atomic_dec_and_test(&qp->refcount))
 546                         wake_up(&qp->wait);
 547         }
 548         for (qp = rnr; qp != NULL;
 549              qp = (struct ipath_qp *) qp->timerwait.prev)
 550                 tasklet_hi_schedule(&qp->s_task);
 551 }
 552
 553 /**
 554  * ipath_ib_piobufavail - callback when a PIO buffer is available
 555  * @arg: the device pointer
 556  *
 557  * This is called from ipath_intr() at interrupt level when a PIO buffer is
 558  * available after ipath_verbs_send() returned an error that no buffers were
 559  * available.  Return 0 if we consumed all the PIO buffers and we still have
 560  * QPs waiting for buffers (for now, just do a tasklet_hi_schedule and
 561  * return one).
 562  */
 563 static int ipath_ib_piobufavail(void *arg)
 564 {
 565         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
 566         struct ipath_qp *qp;
 567         unsigned long flags;
 568
 569         if (dev == NULL)
 570                 goto bail;
 571
 572         spin_lock_irqsave(&dev->pending_lock, flags);
 573         while (!list_empty(&dev->piowait)) {
 574                 qp = list_entry(dev->piowait.next, struct ipath_qp,
 575                                 piowait);
 576                 list_del(&qp->piowait);
 577                 tasklet_hi_schedule(&qp->s_task);
 578         }
 579         spin_unlock_irqrestore(&dev->pending_lock, flags);
 580
 581 bail:
 582         return 1;
 583 }
 584
 585 static int ipath_query_device(struct ib_device *ibdev,
 586                               struct ib_device_attr *props)
 587 {
 588         struct ipath_ibdev *dev = to_idev(ibdev);
 589         u32 vendor, boardrev, majrev, minrev;
 590
 591         memset(props, 0, sizeof(*props));
 592
 593         props->device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
 594                 IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
 595                 IB_DEVICE_SYS_IMAGE_GUID;
 596         ipath_layer_query_device(dev->dd, &vendor, &boardrev,
 597                                  &majrev, &minrev);
 598         props->vendor_id = vendor;
 599         props->vendor_part_id = boardrev;
 600         props->hw_ver = boardrev << 16 | majrev << 8 | minrev;
 601
 602         props->sys_image_guid = dev->sys_image_guid;
 603
 604         props->max_mr_size = ~0ull;
 605         props->max_qp = 0xffff;
 606         props->max_qp_wr = 0xffff;
 607         props->max_sge = 255;
 608         props->max_cq = 0xffff;
 609         props->max_cqe = 0xffff;
 610         props->max_mr = 0xffff;
 611         props->max_pd = 0xffff;
 612         props->max_qp_rd_atom = 1;
 613         props->max_qp_init_rd_atom = 1;
 614         /* props->max_res_rd_atom */
 615         props->max_srq = 0xffff;
 616         props->max_srq_wr = 0xffff;
 617         props->max_srq_sge = 255;
 618         /* props->local_ca_ack_delay */
 619         props->atomic_cap = IB_ATOMIC_HCA;
 620         props->max_pkeys = ipath_layer_get_npkeys(dev->dd);
 621         props->max_mcast_grp = 0xffff;
 622         props->max_mcast_qp_attach = 0xffff;
 623         props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 624                 props->max_mcast_grp;
 625
 626         return 0;
 627 }
 628
 629 const u8 ipath_cvt_physportstate[16] = {
 630         [INFINIPATH_IBCS_LT_STATE_DISABLED] = 3,
 631         [INFINIPATH_IBCS_LT_STATE_LINKUP] = 5,
 632         [INFINIPATH_IBCS_LT_STATE_POLLACTIVE] = 2,
 633         [INFINIPATH_IBCS_LT_STATE_POLLQUIET] = 2,
 634         [INFINIPATH_IBCS_LT_STATE_SLEEPDELAY] = 1,
 635         [INFINIPATH_IBCS_LT_STATE_SLEEPQUIET] = 1,
 636         [INFINIPATH_IBCS_LT_STATE_CFGDEBOUNCE] = 4,
 637         [INFINIPATH_IBCS_LT_STATE_CFGRCVFCFG] = 4,
 638         [INFINIPATH_IBCS_LT_STATE_CFGWAITRMT] = 4,
 639         [INFINIPATH_IBCS_LT_STATE_CFGIDLE] = 4,
 640         [INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN] = 6,
 641         [INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT] = 6,
 642         [INFINIPATH_IBCS_LT_STATE_RECOVERIDLE] = 6,
 643 };
 644
 645 static int ipath_query_port(struct ib_device *ibdev,
 646                             u8 port, struct ib_port_attr *props)
 647 {
 648         struct ipath_ibdev *dev = to_idev(ibdev);
 649         enum ib_mtu mtu;
 650         u16 lid = ipath_layer_get_lid(dev->dd);
 651         u64 ibcstat;
 652
 653         memset(props, 0, sizeof(*props));
 654         props->lid = lid ? lid : __constant_be16_to_cpu(IB_LID_PERMISSIVE);
 655         props->lmc = dev->mkeyprot_resv_lmc & 7;
 656         props->sm_lid = dev->sm_lid;
 657         props->sm_sl = dev->sm_sl;
 658         ibcstat = ipath_layer_get_lastibcstat(dev->dd);
 659         props->state = ((ibcstat >> 4) & 0x3) + 1;
 660         /* See phys_state_show() */
 661         props->phys_state = ipath_cvt_physportstate[
 662                 ipath_layer_get_lastibcstat(dev->dd) & 0xf];
 663         props->port_cap_flags = dev->port_cap_flags;
 664         props->gid_tbl_len = 1;
 665         props->max_msg_sz = 4096;
 666         props->pkey_tbl_len = ipath_layer_get_npkeys(dev->dd);
 667         props->bad_pkey_cntr = ipath_layer_get_cr_errpkey(dev->dd) -
 668                 dev->n_pkey_violations;
 669         props->qkey_viol_cntr = dev->qkey_violations;
 670         props->active_width = IB_WIDTH_4X;
 671         /* See rate_show() */
 672         props->active_speed = 1;        /* Regular 10Mbs speed. */
 673         props->max_vl_num = 1;          /* VLCap = VL0 */
 674         props->init_type_reply = 0;
 675
 676         props->max_mtu = IB_MTU_4096;
 677         switch (ipath_layer_get_ibmtu(dev->dd)) {
 678         case 4096:
 679                 mtu = IB_MTU_4096;
 680                 break;
 681         case 2048:
 682                 mtu = IB_MTU_2048;
 683                 break;
 684         case 1024:
 685                 mtu = IB_MTU_1024;
 686                 break;
 687         case 512:
 688                 mtu = IB_MTU_512;
 689                 break;
 690         case 256:
 691                 mtu = IB_MTU_256;
 692                 break;
 693         default:
 694                 mtu = IB_MTU_2048;
 695         }
 696         props->active_mtu = mtu;
 697         props->subnet_timeout = dev->subnet_timeout;
 698
 699         return 0;
 700 }
 701
 702 static int ipath_modify_device(struct ib_device *device,
 703                                int device_modify_mask,
 704                                struct ib_device_modify *device_modify)
 705 {
 706         int ret;
 707
 708         if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
 709                                    IB_DEVICE_MODIFY_NODE_DESC)) {
 710                 ret = -EOPNOTSUPP;
 711                 goto bail;
 712         }
 713
 714         if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC)
 715                 memcpy(device->node_desc, device_modify->node_desc, 64);
 716
 717         if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
 718                 to_idev(device)->sys_image_guid =
 719                         cpu_to_be64(device_modify->sys_image_guid);
 720
 721         ret = 0;
 722
 723 bail:
 724         return ret;
 725 }
 726
 727 static int ipath_modify_port(struct ib_device *ibdev,
 728                              u8 port, int port_modify_mask,
 729                              struct ib_port_modify *props)
 730 {
 731         struct ipath_ibdev *dev = to_idev(ibdev);
 732
 733         dev->port_cap_flags |= props->set_port_cap_mask;
 734         dev->port_cap_flags &= ~props->clr_port_cap_mask;
 735         if (port_modify_mask & IB_PORT_SHUTDOWN)
 736                 ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKDOWN);
 737         if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
 738                 dev->qkey_violations = 0;
 739         return 0;
 740 }
 741
 742 static int ipath_query_gid(struct ib_device *ibdev, u8 port,
 743                            int index, union ib_gid *gid)
 744 {
 745         struct ipath_ibdev *dev = to_idev(ibdev);
 746         int ret;
 747
 748         if (index >= 1) {
 749                 ret = -EINVAL;
 750                 goto bail;
 751         }
 752         gid->global.subnet_prefix = dev->gid_prefix;
 753         gid->global.interface_id = ipath_layer_get_guid(dev->dd);
 754
 755         ret = 0;
 756
 757 bail:
 758         return ret;
 759 }
 760
 761 static struct ib_pd *ipath_alloc_pd(struct ib_device *ibdev,
 762                                     struct ib_ucontext *context,
 763                                     struct ib_udata *udata)
 764 {
 765         struct ipath_pd *pd;
 766         struct ib_pd *ret;
 767
 768         pd = kmalloc(sizeof *pd, GFP_KERNEL);
 769         if (!pd) {
 770                 ret = ERR_PTR(-ENOMEM);
 771                 goto bail;
 772         }
 773
 774         /* ib_alloc_pd() will initialize pd->ibpd. */
 775         pd->user = udata != NULL;
 776
 777         ret = &pd->ibpd;
 778
 779 bail:
 780         return ret;
 781 }
 782
 783 static int ipath_dealloc_pd(struct ib_pd *ibpd)
 784 {
 785         struct ipath_pd *pd = to_ipd(ibpd);
 786
 787         kfree(pd);
 788
 789         return 0;
 790 }
 791
 792 /**
 793  * ipath_create_ah - create an address handle
 794  * @pd: the protection domain
 795  * @ah_attr: the attributes of the AH
 796  *
 797  * This may be called from interrupt context.
 798  */
 799 static struct ib_ah *ipath_create_ah(struct ib_pd *pd,
 800                                      struct ib_ah_attr *ah_attr)
 801 {
 802         struct ipath_ah *ah;
 803         struct ib_ah *ret;
 804
 805         /* A multicast address requires a GRH (see ch. 8.4.1). */
 806         if (ah_attr->dlid >= IPS_MULTICAST_LID_BASE &&
 807             ah_attr->dlid != IPS_PERMISSIVE_LID &&
 808             !(ah_attr->ah_flags & IB_AH_GRH)) {
 809                 ret = ERR_PTR(-EINVAL);
 810                 goto bail;
 811         }
 812
 813         ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 814         if (!ah) {
 815                 ret = ERR_PTR(-ENOMEM);
 816                 goto bail;
 817         }
 818
 819         /* ib_create_ah() will initialize ah->ibah. */
 820         ah->attr = *ah_attr;
 821
 822         ret = &ah->ibah;
 823
 824 bail:
 825         return ret;
 826 }
 827
 828 /**
 829  * ipath_destroy_ah - destroy an address handle
 830  * @ibah: the AH to destroy
 831  *
 832  * This may be called from interrupt context.
 833  */
 834 static int ipath_destroy_ah(struct ib_ah *ibah)
 835 {
 836         struct ipath_ah *ah = to_iah(ibah);
 837
 838         kfree(ah);
 839
 840         return 0;
 841 }
 842
 843 static int ipath_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
 844 {
 845         struct ipath_ah *ah = to_iah(ibah);
 846
 847         *ah_attr = ah->attr;
 848
 849         return 0;
 850 }
 851
 852 static int ipath_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 853                             u16 *pkey)
 854 {
 855         struct ipath_ibdev *dev = to_idev(ibdev);
 856         int ret;
 857
 858         if (index >= ipath_layer_get_npkeys(dev->dd)) {
 859                 ret = -EINVAL;
 860                 goto bail;
 861         }
 862
 863         *pkey = ipath_layer_get_pkey(dev->dd, index);
 864         ret = 0;
 865
 866 bail:
 867         return ret;
 868 }
 869
 870
 871 /**
 872  * ipath_alloc_ucontext - allocate a ucontest
 873  * @ibdev: the infiniband device
 874  * @udata: not used by the InfiniPath driver
 875  */
 876
 877 static struct ib_ucontext *ipath_alloc_ucontext(struct ib_device *ibdev,
 878                                                 struct ib_udata *udata)
 879 {
 880         struct ipath_ucontext *context;
 881         struct ib_ucontext *ret;
 882
 883         context = kmalloc(sizeof *context, GFP_KERNEL);
 884         if (!context) {
 885                 ret = ERR_PTR(-ENOMEM);
 886                 goto bail;
 887         }
 888
 889         ret = &context->ibucontext;
 890
 891 bail:
 892         return ret;
 893 }
 894
 895 static int ipath_dealloc_ucontext(struct ib_ucontext *context)
 896 {
 897         kfree(to_iucontext(context));
 898         return 0;
 899 }
 900
 901 static int ipath_verbs_register_sysfs(struct ib_device *dev);
 902
 903 /**
 904  * ipath_register_ib_device - register our device with the infiniband core
 905  * @unit: the device number to register
 906  * @dd: the device data structure
 907  * Return the allocated ipath_ibdev pointer or NULL on error.
 908  */
 909 static void *ipath_register_ib_device(int unit, struct ipath_devdata *dd)
 910 {
 911         struct ipath_ibdev *idev;
 912         struct ib_device *dev;
 913         int ret;
 914
 915         idev = (struct ipath_ibdev *)ib_alloc_device(sizeof *idev);
 916         if (idev == NULL)
 917                 goto bail;
 918
 919         dev = &idev->ibdev;
 920
 921         /* Only need to initialize non-zero fields. */
 922         spin_lock_init(&idev->qp_table.lock);
 923         spin_lock_init(&idev->lk_table.lock);
 924         idev->sm_lid = __constant_be16_to_cpu(IB_LID_PERMISSIVE);
 925         /* Set the prefix to the default value (see ch. 4.1.1) */
 926         idev->gid_prefix = __constant_cpu_to_be64(0xfe80000000000000ULL);
 927
 928         ret = ipath_init_qp_table(idev, ib_ipath_qp_table_size);
 929         if (ret)
 930                 goto err_qp;
 931
 932         /*
 933          * The top ib_ipath_lkey_table_size bits are used to index the
 934          * table.  The lower 8 bits can be owned by the user (copied from
 935          * the LKEY).  The remaining bits act as a generation number or tag.
 936          */
 937         idev->lk_table.max = 1 << ib_ipath_lkey_table_size;
 938         idev->lk_table.table = kzalloc(idev->lk_table.max *
 939                                        sizeof(*idev->lk_table.table),
 940                                        GFP_KERNEL);
 941         if (idev->lk_table.table == NULL) {
 942                 ret = -ENOMEM;
 943                 goto err_lk;
 944         }
 945         spin_lock_init(&idev->pending_lock);
 946         INIT_LIST_HEAD(&idev->pending[0]);
 947         INIT_LIST_HEAD(&idev->pending[1]);
 948         INIT_LIST_HEAD(&idev->pending[2]);
 949         INIT_LIST_HEAD(&idev->piowait);
 950         INIT_LIST_HEAD(&idev->rnrwait);
 951         idev->pending_index = 0;
 952         idev->port_cap_flags =
 953                 IB_PORT_SYS_IMAGE_GUID_SUP | IB_PORT_CLIENT_REG_SUP;
 954         idev->pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
 955         idev->pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
 956         idev->pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
 957         idev->pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
 958         idev->pma_counter_select[5] = IB_PMA_PORT_XMIT_WAIT;
 959         idev->link_width_enabled = 3;   /* 1x or 4x */
 960
 961         /*
 962          * The system image GUID is supposed to be the same for all
 963          * IB HCAs in a single system but since there can be other
 964          * device types in the system, we can't be sure this is unique.
 965          */
 966         if (!sys_image_guid)
 967                 sys_image_guid = ipath_layer_get_guid(dd);
 968         idev->sys_image_guid = sys_image_guid;
 969         idev->ib_unit = unit;
 970         idev->dd = dd;
 971
 972         strlcpy(dev->name, "ipath%d", IB_DEVICE_NAME_MAX);
 973         dev->node_guid = ipath_layer_get_guid(dd);
 974         dev->uverbs_abi_ver = IPATH_UVERBS_ABI_VERSION;
 975         dev->uverbs_cmd_mask =
 976                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
 977                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
 978                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
 979                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
 980                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
 981                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
 982                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH)          |
 983                 (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
 984                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
 985                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
 986                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
 987                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
 988                 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
 989                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
 990                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
 991                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
 992                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
 993                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
 994                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
 995                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
 996                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
 997                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
 998                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
 999                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
1000                 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
1001                 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
1002                 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
1003                 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
1004                 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
1005         dev->node_type = IB_NODE_CA;
1006         dev->phys_port_cnt = 1;
1007         dev->dma_device = ipath_layer_get_device(dd);
1008         dev->class_dev.dev = dev->dma_device;
1009         dev->query_device = ipath_query_device;
1010         dev->modify_device = ipath_modify_device;
1011         dev->query_port = ipath_query_port;
1012         dev->modify_port = ipath_modify_port;
1013         dev->query_pkey = ipath_query_pkey;
1014         dev->query_gid = ipath_query_gid;
1015         dev->alloc_ucontext = ipath_alloc_ucontext;
1016         dev->dealloc_ucontext = ipath_dealloc_ucontext;
1017         dev->alloc_pd = ipath_alloc_pd;
1018         dev->dealloc_pd = ipath_dealloc_pd;
1019         dev->create_ah = ipath_create_ah;
1020         dev->destroy_ah = ipath_destroy_ah;
1021         dev->query_ah = ipath_query_ah;
1022         dev->create_srq = ipath_create_srq;
1023         dev->modify_srq = ipath_modify_srq;
1024         dev->query_srq = ipath_query_srq;
1025         dev->destroy_srq = ipath_destroy_srq;
1026         dev->create_qp = ipath_create_qp;
1027         dev->modify_qp = ipath_modify_qp;
1028         dev->query_qp = ipath_query_qp;
1029         dev->destroy_qp = ipath_destroy_qp;
1030         dev->post_send = ipath_post_send;
1031         dev->post_recv = ipath_post_receive;
1032         dev->post_srq_recv = ipath_post_srq_receive;
1033         dev->create_cq = ipath_create_cq;
1034         dev->destroy_cq = ipath_destroy_cq;
1035         dev->resize_cq = ipath_resize_cq;
1036         dev->poll_cq = ipath_poll_cq;
1037         dev->req_notify_cq = ipath_req_notify_cq;
1038         dev->get_dma_mr = ipath_get_dma_mr;
1039         dev->reg_phys_mr = ipath_reg_phys_mr;
1040         dev->reg_user_mr = ipath_reg_user_mr;
1041         dev->dereg_mr = ipath_dereg_mr;
1042         dev->alloc_fmr = ipath_alloc_fmr;
1043         dev->map_phys_fmr = ipath_map_phys_fmr;
1044         dev->unmap_fmr = ipath_unmap_fmr;
1045         dev->dealloc_fmr = ipath_dealloc_fmr;
1046         dev->attach_mcast = ipath_multicast_attach;
1047         dev->detach_mcast = ipath_multicast_detach;
1048         dev->process_mad = ipath_process_mad;
1049
1050         snprintf(dev->node_desc, sizeof(dev->node_desc),
1051                  IPATH_IDSTR " %s kernel_SMA", system_utsname.nodename);
1052
1053         ret = ib_register_device(dev);
1054         if (ret)
1055                 goto err_reg;
1056
1057         if (ipath_verbs_register_sysfs(dev))
1058                 goto err_class;
1059
1060         ipath_layer_enable_timer(dd);
1061
1062         goto bail;
1063
1064 err_class:
1065         ib_unregister_device(dev);
1066 err_reg:
1067         kfree(idev->lk_table.table);
1068 err_lk:
1069         kfree(idev->qp_table.table);
1070 err_qp:
1071         ib_dealloc_device(dev);
1072         _VERBS_ERROR("ib_ipath%d cannot register verbs (%d)!\n",
1073                      unit, -ret);
1074         idev = NULL;
1075
1076 bail:
1077         return idev;
1078 }
1079
1080 static void ipath_unregister_ib_device(void *arg)
1081 {
1082         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
1083         struct ib_device *ibdev = &dev->ibdev;
1084
1085         ipath_layer_disable_timer(dev->dd);
1086
1087         ib_unregister_device(ibdev);
1088
1089         if (!list_empty(&dev->pending[0]) ||
1090             !list_empty(&dev->pending[1]) ||
1091             !list_empty(&dev->pending[2]))
1092                 _VERBS_ERROR("ipath%d pending list not empty!\n",
1093                              dev->ib_unit);
1094         if (!list_empty(&dev->piowait))
1095                 _VERBS_ERROR("ipath%d piowait list not empty!\n",
1096                              dev->ib_unit);
1097         if (!list_empty(&dev->rnrwait))
1098                 _VERBS_ERROR("ipath%d rnrwait list not empty!\n",
1099                              dev->ib_unit);
1100         if (!ipath_mcast_tree_empty())
1101                 _VERBS_ERROR("ipath%d multicast table memory leak!\n",
1102                              dev->ib_unit);
1103         /*
1104          * Note that ipath_unregister_ib_device() can be called before all
1105          * the QPs are destroyed!
1106          */
1107         ipath_free_all_qps(&dev->qp_table);
1108         kfree(dev->qp_table.table);
1109         kfree(dev->lk_table.table);
1110         ib_dealloc_device(ibdev);
1111 }
1112
1113 static int __init ipath_verbs_init(void)
1114 {
1115         return ipath_verbs_register(ipath_register_ib_device,
1116                                     ipath_unregister_ib_device,
1117                                     ipath_ib_piobufavail, ipath_ib_rcv,
1118                                     ipath_ib_timer);
1119 }
1120
1121 static void __exit ipath_verbs_cleanup(void)
1122 {
1123         ipath_verbs_unregister();
1124 }
1125
1126 static ssize_t show_rev(struct class_device *cdev, char *buf)
1127 {
1128         struct ipath_ibdev *dev =
1129                 container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
1130         int vendor, boardrev, majrev, minrev;
1131
1132         ipath_layer_query_device(dev->dd, &vendor, &boardrev,
1133                                  &majrev, &minrev);
1134         return sprintf(buf, "%d.%d\n", majrev, minrev);
1135 }
1136
1137 static ssize_t show_hca(struct class_device *cdev, char *buf)
1138 {
1139         struct ipath_ibdev *dev =
1140                 container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
1141         int ret;
1142
1143         ret = ipath_layer_get_boardname(dev->dd, buf, 128);
1144         if (ret < 0)
1145                 goto bail;
1146         strcat(buf, "\n");
1147         ret = strlen(buf);
1148
1149 bail:
1150         return ret;
1151 }
1152
1153 static ssize_t show_stats(struct class_device *cdev, char *buf)
1154 {
1155         struct ipath_ibdev *dev =
1156                 container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
1157         int i;
1158         int len;
1159
1160         len = sprintf(buf,
1161                       "RC resends  %d\n"
1162                       "RC QACKs    %d\n"
1163                       "RC ACKs     %d\n"
1164                       "RC SEQ NAKs %d\n"
1165                       "RC RDMA seq %d\n"
1166                       "RC RNR NAKs %d\n"
1167                       "RC OTH NAKs %d\n"
1168                       "RC timeouts %d\n"
1169                       "RC RDMA dup %d\n"
1170                       "piobuf wait %d\n"
1171                       "no piobuf   %d\n"
1172                       "PKT drops   %d\n"
1173                       "WQE errs    %d\n",
1174                       dev->n_rc_resends, dev->n_rc_qacks, dev->n_rc_acks,
1175                       dev->n_seq_naks, dev->n_rdma_seq, dev->n_rnr_naks,
1176                       dev->n_other_naks, dev->n_timeouts,
1177                       dev->n_rdma_dup_busy, dev->n_piowait,
1178                       dev->n_no_piobuf, dev->n_pkt_drops, dev->n_wqe_errs);
1179         for (i = 0; i < ARRAY_SIZE(dev->opstats); i++) {
1180                 const struct ipath_opcode_stats *si = &dev->opstats[i];
1181
1182                 if (!si->n_packets && !si->n_bytes)
1183                         continue;
1184                 len += sprintf(buf + len, "%02x %llu/%llu\n", i,
1185                                (unsigned long long) si->n_packets,
1186                                (unsigned long long) si->n_bytes);
1187         }
1188         return len;
1189 }
1190
1191 static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1192 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1193 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
1194 static CLASS_DEVICE_ATTR(stats, S_IRUGO, show_stats, NULL);
1195
1196 static struct class_device_attribute *ipath_class_attributes[] = {
1197         &class_device_attr_hw_rev,
1198         &class_device_attr_hca_type,
1199         &class_device_attr_board_id,
1200         &class_device_attr_stats
1201 };
1202
1203 static int ipath_verbs_register_sysfs(struct ib_device *dev)
1204 {
1205         int i;
1206         int ret;
1207
1208         for (i = 0; i < ARRAY_SIZE(ipath_class_attributes); ++i)
1209                 if (class_device_create_file(&dev->class_dev,
1210                                              ipath_class_attributes[i])) {
1211                         ret = 1;
1212                         goto bail;
1213                 }
1214
1215         ret = 0;
1216
1217 bail:
1218         return ret;
1219 }
1220
1221 module_init(ipath_verbs_init);
1222 module_exit(ipath_verbs_cleanup);