drivers/infiniband/hw/ipath/ipath_verbs.c

   1 /*
   2  * Copyright (c) 2006 QLogic, Inc. All rights reserved.
   3  * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <rdma/ib_mad.h>
  35 #include <rdma/ib_user_verbs.h>
  36 #include <linux/utsname.h>
  37
  38 #include "ipath_kernel.h"
  39 #include "ipath_verbs.h"
  40 #include "ipath_common.h"
  41
  42 /* Not static, because we don't want the compiler removing it */
  43 const char ipath_verbs_version[] = "ipath_verbs " IPATH_IDSTR;
  44
  45 static unsigned int ib_ipath_qp_table_size = 251;
  46 module_param_named(qp_table_size, ib_ipath_qp_table_size, uint, S_IRUGO);
  47 MODULE_PARM_DESC(qp_table_size, "QP table size");
  48
  49 unsigned int ib_ipath_lkey_table_size = 12;
  50 module_param_named(lkey_table_size, ib_ipath_lkey_table_size, uint,
  51                    S_IRUGO);
  52 MODULE_PARM_DESC(lkey_table_size,
  53                  "LKEY table size in bits (2^n, 1 <= n <= 23)");
  54
  55 unsigned int ib_ipath_debug;    /* debug mask */
  56 module_param_named(debug, ib_ipath_debug, uint, S_IWUSR | S_IRUGO);
  57 MODULE_PARM_DESC(debug, "Verbs debug mask");
  58
  59 static unsigned int ib_ipath_max_pds = 0xFFFF;
  60 module_param_named(max_pds, ib_ipath_max_pds, uint, S_IWUSR | S_IRUGO);
  61 MODULE_PARM_DESC(max_pds,
  62                  "Maximum number of protection domains to support");
  63
  64 static unsigned int ib_ipath_max_ahs = 0xFFFF;
  65 module_param_named(max_ahs, ib_ipath_max_ahs, uint, S_IWUSR | S_IRUGO);
  66 MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support");
  67
  68 unsigned int ib_ipath_max_cqes = 0x2FFFF;
  69 module_param_named(max_cqes, ib_ipath_max_cqes, uint, S_IWUSR | S_IRUGO);
  70 MODULE_PARM_DESC(max_cqes,
  71                  "Maximum number of completion queue entries to support");
  72
  73 unsigned int ib_ipath_max_cqs = 0x1FFFF;
  74 module_param_named(max_cqs, ib_ipath_max_cqs, uint, S_IWUSR | S_IRUGO);
  75 MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support");
  76
  77 unsigned int ib_ipath_max_qp_wrs = 0x3FFF;
  78 module_param_named(max_qp_wrs, ib_ipath_max_qp_wrs, uint,
  79                    S_IWUSR | S_IRUGO);
  80 MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support");
  81
  82 unsigned int ib_ipath_max_sges = 0x60;
  83 module_param_named(max_sges, ib_ipath_max_sges, uint, S_IWUSR | S_IRUGO);
  84 MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support");
  85
  86 unsigned int ib_ipath_max_mcast_grps = 16384;
  87 module_param_named(max_mcast_grps, ib_ipath_max_mcast_grps, uint,
  88                    S_IWUSR | S_IRUGO);
  89 MODULE_PARM_DESC(max_mcast_grps,
  90                  "Maximum number of multicast groups to support");
  91
  92 unsigned int ib_ipath_max_mcast_qp_attached = 16;
  93 module_param_named(max_mcast_qp_attached, ib_ipath_max_mcast_qp_attached,
  94                    uint, S_IWUSR | S_IRUGO);
  95 MODULE_PARM_DESC(max_mcast_qp_attached,
  96                  "Maximum number of attached QPs to support");
  97
  98 unsigned int ib_ipath_max_srqs = 1024;
  99 module_param_named(max_srqs, ib_ipath_max_srqs, uint, S_IWUSR | S_IRUGO);
 100 MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support");
 101
 102 unsigned int ib_ipath_max_srq_sges = 128;
 103 module_param_named(max_srq_sges, ib_ipath_max_srq_sges,
 104                    uint, S_IWUSR | S_IRUGO);
 105 MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support");
 106
 107 unsigned int ib_ipath_max_srq_wrs = 0x1FFFF;
 108 module_param_named(max_srq_wrs, ib_ipath_max_srq_wrs,
 109                    uint, S_IWUSR | S_IRUGO);
 110 MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support");
 111
 112 MODULE_LICENSE("GPL");
 113 MODULE_AUTHOR("QLogic <support@pathscale.com>");
 114 MODULE_DESCRIPTION("QLogic InfiniPath driver");
 115
 116 const int ib_ipath_state_ops[IB_QPS_ERR + 1] = {
 117         [IB_QPS_RESET] = 0,
 118         [IB_QPS_INIT] = IPATH_POST_RECV_OK,
 119         [IB_QPS_RTR] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
 120         [IB_QPS_RTS] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
 121             IPATH_POST_SEND_OK | IPATH_PROCESS_SEND_OK,
 122         [IB_QPS_SQD] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK |
 123             IPATH_POST_SEND_OK,
 124         [IB_QPS_SQE] = IPATH_POST_RECV_OK | IPATH_PROCESS_RECV_OK,
 125         [IB_QPS_ERR] = 0,
 126 };
 127
 128 /*
 129  * Translate ib_wr_opcode into ib_wc_opcode.
 130  */
 131 const enum ib_wc_opcode ib_ipath_wc_opcode[] = {
 132         [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE,
 133         [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE,
 134         [IB_WR_SEND] = IB_WC_SEND,
 135         [IB_WR_SEND_WITH_IMM] = IB_WC_SEND,
 136         [IB_WR_RDMA_READ] = IB_WC_RDMA_READ,
 137         [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP,
 138         [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD
 139 };
 140
 141 /*
 142  * System image GUID.
 143  */
 144 static __be64 sys_image_guid;
 145
 146 /**
 147  * ipath_copy_sge - copy data to SGE memory
 148  * @ss: the SGE state
 149  * @data: the data to copy
 150  * @length: the length of the data
 151  */
 152 void ipath_copy_sge(struct ipath_sge_state *ss, void *data, u32 length)
 153 {
 154         struct ipath_sge *sge = &ss->sge;
 155
 156         while (length) {
 157                 u32 len = sge->length;
 158
 159                 BUG_ON(len == 0);
 160                 if (len > length)
 161                         len = length;
 162                 memcpy(sge->vaddr, data, len);
 163                 sge->vaddr += len;
 164                 sge->length -= len;
 165                 sge->sge_length -= len;
 166                 if (sge->sge_length == 0) {
 167                         if (--ss->num_sge)
 168                                 *sge = *ss->sg_list++;
 169                 } else if (sge->length == 0 && sge->mr != NULL) {
 170                         if (++sge->n >= IPATH_SEGSZ) {
 171                                 if (++sge->m >= sge->mr->mapsz)
 172                                         break;
 173                                 sge->n = 0;
 174                         }
 175                         sge->vaddr =
 176                                 sge->mr->map[sge->m]->segs[sge->n].vaddr;
 177                         sge->length =
 178                                 sge->mr->map[sge->m]->segs[sge->n].length;
 179                 }
 180                 data += len;
 181                 length -= len;
 182         }
 183 }
 184
 185 /**
 186  * ipath_skip_sge - skip over SGE memory - XXX almost dup of prev func
 187  * @ss: the SGE state
 188  * @length: the number of bytes to skip
 189  */
 190 void ipath_skip_sge(struct ipath_sge_state *ss, u32 length)
 191 {
 192         struct ipath_sge *sge = &ss->sge;
 193
 194         while (length) {
 195                 u32 len = sge->length;
 196
 197                 BUG_ON(len == 0);
 198                 if (len > length)
 199                         len = length;
 200                 sge->vaddr += len;
 201                 sge->length -= len;
 202                 sge->sge_length -= len;
 203                 if (sge->sge_length == 0) {
 204                         if (--ss->num_sge)
 205                                 *sge = *ss->sg_list++;
 206                 } else if (sge->length == 0 && sge->mr != NULL) {
 207                         if (++sge->n >= IPATH_SEGSZ) {
 208                                 if (++sge->m >= sge->mr->mapsz)
 209                                         break;
 210                                 sge->n = 0;
 211                         }
 212                         sge->vaddr =
 213                                 sge->mr->map[sge->m]->segs[sge->n].vaddr;
 214                         sge->length =
 215                                 sge->mr->map[sge->m]->segs[sge->n].length;
 216                 }
 217                 length -= len;
 218         }
 219 }
 220
 221 /**
 222  * ipath_post_send - post a send on a QP
 223  * @ibqp: the QP to post the send on
 224  * @wr: the list of work requests to post
 225  * @bad_wr: the first bad WR is put here
 226  *
 227  * This may be called from interrupt context.
 228  */
 229 static int ipath_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 230                            struct ib_send_wr **bad_wr)
 231 {
 232         struct ipath_qp *qp = to_iqp(ibqp);
 233         int err = 0;
 234
 235         /* Check that state is OK to post send. */
 236         if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_SEND_OK)) {
 237                 *bad_wr = wr;
 238                 err = -EINVAL;
 239                 goto bail;
 240         }
 241
 242         for (; wr; wr = wr->next) {
 243                 switch (qp->ibqp.qp_type) {
 244                 case IB_QPT_UC:
 245                 case IB_QPT_RC:
 246                         err = ipath_post_ruc_send(qp, wr);
 247                         break;
 248
 249                 case IB_QPT_SMI:
 250                 case IB_QPT_GSI:
 251                 case IB_QPT_UD:
 252                         err = ipath_post_ud_send(qp, wr);
 253                         break;
 254
 255                 default:
 256                         err = -EINVAL;
 257                 }
 258                 if (err) {
 259                         *bad_wr = wr;
 260                         break;
 261                 }
 262         }
 263
 264 bail:
 265         return err;
 266 }
 267
 268 /**
 269  * ipath_post_receive - post a receive on a QP
 270  * @ibqp: the QP to post the receive on
 271  * @wr: the WR to post
 272  * @bad_wr: the first bad WR is put here
 273  *
 274  * This may be called from interrupt context.
 275  */
 276 static int ipath_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
 277                               struct ib_recv_wr **bad_wr)
 278 {
 279         struct ipath_qp *qp = to_iqp(ibqp);
 280         struct ipath_rwq *wq = qp->r_rq.wq;
 281         unsigned long flags;
 282         int ret;
 283
 284         /* Check that state is OK to post receive. */
 285         if (!(ib_ipath_state_ops[qp->state] & IPATH_POST_RECV_OK) || !wq) {
 286                 *bad_wr = wr;
 287                 ret = -EINVAL;
 288                 goto bail;
 289         }
 290
 291         for (; wr; wr = wr->next) {
 292                 struct ipath_rwqe *wqe;
 293                 u32 next;
 294                 int i;
 295
 296                 if ((unsigned) wr->num_sge > qp->r_rq.max_sge) {
 297                         *bad_wr = wr;
 298                         ret = -ENOMEM;
 299                         goto bail;
 300                 }
 301
 302                 spin_lock_irqsave(&qp->r_rq.lock, flags);
 303                 next = wq->head + 1;
 304                 if (next >= qp->r_rq.size)
 305                         next = 0;
 306                 if (next == wq->tail) {
 307                         spin_unlock_irqrestore(&qp->r_rq.lock, flags);
 308                         *bad_wr = wr;
 309                         ret = -ENOMEM;
 310                         goto bail;
 311                 }
 312
 313                 wqe = get_rwqe_ptr(&qp->r_rq, wq->head);
 314                 wqe->wr_id = wr->wr_id;
 315                 wqe->num_sge = wr->num_sge;
 316                 for (i = 0; i < wr->num_sge; i++)
 317                         wqe->sg_list[i] = wr->sg_list[i];
 318                 wq->head = next;
 319                 spin_unlock_irqrestore(&qp->r_rq.lock, flags);
 320         }
 321         ret = 0;
 322
 323 bail:
 324         return ret;
 325 }
 326
 327 /**
 328  * ipath_qp_rcv - processing an incoming packet on a QP
 329  * @dev: the device the packet came on
 330  * @hdr: the packet header
 331  * @has_grh: true if the packet has a GRH
 332  * @data: the packet data
 333  * @tlen: the packet length
 334  * @qp: the QP the packet came on
 335  *
 336  * This is called from ipath_ib_rcv() to process an incoming packet
 337  * for the given QP.
 338  * Called at interrupt level.
 339  */
 340 static void ipath_qp_rcv(struct ipath_ibdev *dev,
 341                          struct ipath_ib_header *hdr, int has_grh,
 342                          void *data, u32 tlen, struct ipath_qp *qp)
 343 {
 344         /* Check for valid receive state. */
 345         if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_RECV_OK)) {
 346                 dev->n_pkt_drops++;
 347                 return;
 348         }
 349
 350         switch (qp->ibqp.qp_type) {
 351         case IB_QPT_SMI:
 352         case IB_QPT_GSI:
 353         case IB_QPT_UD:
 354                 ipath_ud_rcv(dev, hdr, has_grh, data, tlen, qp);
 355                 break;
 356
 357         case IB_QPT_RC:
 358                 ipath_rc_rcv(dev, hdr, has_grh, data, tlen, qp);
 359                 break;
 360
 361         case IB_QPT_UC:
 362                 ipath_uc_rcv(dev, hdr, has_grh, data, tlen, qp);
 363                 break;
 364
 365         default:
 366                 break;
 367         }
 368 }
 369
 370 /**
 371  * ipath_ib_rcv - process and incoming packet
 372  * @arg: the device pointer
 373  * @rhdr: the header of the packet
 374  * @data: the packet data
 375  * @tlen: the packet length
 376  *
 377  * This is called from ipath_kreceive() to process an incoming packet at
 378  * interrupt level. Tlen is the length of the header + data + CRC in bytes.
 379  */
 380 static void ipath_ib_rcv(void *arg, void *rhdr, void *data, u32 tlen)
 381 {
 382         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
 383         struct ipath_ib_header *hdr = rhdr;
 384         struct ipath_other_headers *ohdr;
 385         struct ipath_qp *qp;
 386         u32 qp_num;
 387         int lnh;
 388         u8 opcode;
 389         u16 lid;
 390
 391         if (unlikely(dev == NULL))
 392                 goto bail;
 393
 394         if (unlikely(tlen < 24)) {      /* LRH+BTH+CRC */
 395                 dev->rcv_errors++;
 396                 goto bail;
 397         }
 398
 399         /* Check for a valid destination LID (see ch. 7.11.1). */
 400         lid = be16_to_cpu(hdr->lrh[1]);
 401         if (lid < IPATH_MULTICAST_LID_BASE) {
 402                 lid &= ~((1 << (dev->mkeyprot_resv_lmc & 7)) - 1);
 403                 if (unlikely(lid != ipath_layer_get_lid(dev->dd))) {
 404                         dev->rcv_errors++;
 405                         goto bail;
 406                 }
 407         }
 408
 409         /* Check for GRH */
 410         lnh = be16_to_cpu(hdr->lrh[0]) & 3;
 411         if (lnh == IPATH_LRH_BTH)
 412                 ohdr = &hdr->u.oth;
 413         else if (lnh == IPATH_LRH_GRH)
 414                 ohdr = &hdr->u.l.oth;
 415         else {
 416                 dev->rcv_errors++;
 417                 goto bail;
 418         }
 419
 420         opcode = be32_to_cpu(ohdr->bth[0]) >> 24;
 421         dev->opstats[opcode].n_bytes += tlen;
 422         dev->opstats[opcode].n_packets++;
 423
 424         /* Get the destination QP number. */
 425         qp_num = be32_to_cpu(ohdr->bth[1]) & IPATH_QPN_MASK;
 426         if (qp_num == IPATH_MULTICAST_QPN) {
 427                 struct ipath_mcast *mcast;
 428                 struct ipath_mcast_qp *p;
 429
 430                 mcast = ipath_mcast_find(&hdr->u.l.grh.dgid);
 431                 if (mcast == NULL) {
 432                         dev->n_pkt_drops++;
 433                         goto bail;
 434                 }
 435                 dev->n_multicast_rcv++;
 436                 list_for_each_entry_rcu(p, &mcast->qp_list, list)
 437                         ipath_qp_rcv(dev, hdr, lnh == IPATH_LRH_GRH, data,
 438                                      tlen, p->qp);
 439                 /*
 440                  * Notify ipath_multicast_detach() if it is waiting for us
 441                  * to finish.
 442                  */
 443                 if (atomic_dec_return(&mcast->refcount) <= 1)
 444                         wake_up(&mcast->wait);
 445         } else {
 446                 qp = ipath_lookup_qpn(&dev->qp_table, qp_num);
 447                 if (qp) {
 448                         dev->n_unicast_rcv++;
 449                         ipath_qp_rcv(dev, hdr, lnh == IPATH_LRH_GRH, data,
 450                                      tlen, qp);
 451                         /*
 452                          * Notify ipath_destroy_qp() if it is waiting
 453                          * for us to finish.
 454                          */
 455                         if (atomic_dec_and_test(&qp->refcount))
 456                                 wake_up(&qp->wait);
 457                 } else
 458                         dev->n_pkt_drops++;
 459         }
 460
 461 bail:;
 462 }
 463
 464 /**
 465  * ipath_ib_timer - verbs timer
 466  * @arg: the device pointer
 467  *
 468  * This is called from ipath_do_rcv_timer() at interrupt level to check for
 469  * QPs which need retransmits and to collect performance numbers.
 470  */
 471 static void ipath_ib_timer(void *arg)
 472 {
 473         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
 474         struct ipath_qp *resend = NULL;
 475         struct list_head *last;
 476         struct ipath_qp *qp;
 477         unsigned long flags;
 478
 479         if (dev == NULL)
 480                 return;
 481
 482         spin_lock_irqsave(&dev->pending_lock, flags);
 483         /* Start filling the next pending queue. */
 484         if (++dev->pending_index >= ARRAY_SIZE(dev->pending))
 485                 dev->pending_index = 0;
 486         /* Save any requests still in the new queue, they have timed out. */
 487         last = &dev->pending[dev->pending_index];
 488         while (!list_empty(last)) {
 489                 qp = list_entry(last->next, struct ipath_qp, timerwait);
 490                 list_del_init(&qp->timerwait);
 491                 qp->timer_next = resend;
 492                 resend = qp;
 493                 atomic_inc(&qp->refcount);
 494         }
 495         last = &dev->rnrwait;
 496         if (!list_empty(last)) {
 497                 qp = list_entry(last->next, struct ipath_qp, timerwait);
 498                 if (--qp->s_rnr_timeout == 0) {
 499                         do {
 500                                 list_del_init(&qp->timerwait);
 501                                 tasklet_hi_schedule(&qp->s_task);
 502                                 if (list_empty(last))
 503                                         break;
 504                                 qp = list_entry(last->next, struct ipath_qp,
 505                                                 timerwait);
 506                         } while (qp->s_rnr_timeout == 0);
 507                 }
 508         }
 509         /*
 510          * We should only be in the started state if pma_sample_start != 0
 511          */
 512         if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_STARTED &&
 513             --dev->pma_sample_start == 0) {
 514                 dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_RUNNING;
 515                 ipath_layer_snapshot_counters(dev->dd, &dev->ipath_sword,
 516                                               &dev->ipath_rword,
 517                                               &dev->ipath_spkts,
 518                                               &dev->ipath_rpkts,
 519                                               &dev->ipath_xmit_wait);
 520         }
 521         if (dev->pma_sample_status == IB_PMA_SAMPLE_STATUS_RUNNING) {
 522                 if (dev->pma_sample_interval == 0) {
 523                         u64 ta, tb, tc, td, te;
 524
 525                         dev->pma_sample_status = IB_PMA_SAMPLE_STATUS_DONE;
 526                         ipath_layer_snapshot_counters(dev->dd, &ta, &tb,
 527                                                       &tc, &td, &te);
 528
 529                         dev->ipath_sword = ta - dev->ipath_sword;
 530                         dev->ipath_rword = tb - dev->ipath_rword;
 531                         dev->ipath_spkts = tc - dev->ipath_spkts;
 532                         dev->ipath_rpkts = td - dev->ipath_rpkts;
 533                         dev->ipath_xmit_wait = te - dev->ipath_xmit_wait;
 534                 }
 535                 else
 536                         dev->pma_sample_interval--;
 537         }
 538         spin_unlock_irqrestore(&dev->pending_lock, flags);
 539
 540         /* XXX What if timer fires again while this is running? */
 541         for (qp = resend; qp != NULL; qp = qp->timer_next) {
 542                 struct ib_wc wc;
 543
 544                 spin_lock_irqsave(&qp->s_lock, flags);
 545                 if (qp->s_last != qp->s_tail && qp->state == IB_QPS_RTS) {
 546                         dev->n_timeouts++;
 547                         ipath_restart_rc(qp, qp->s_last_psn + 1, &wc);
 548                 }
 549                 spin_unlock_irqrestore(&qp->s_lock, flags);
 550
 551                 /* Notify ipath_destroy_qp() if it is waiting. */
 552                 if (atomic_dec_and_test(&qp->refcount))
 553                         wake_up(&qp->wait);
 554         }
 555 }
 556
 557 /**
 558  * ipath_ib_piobufavail - callback when a PIO buffer is available
 559  * @arg: the device pointer
 560  *
 561  * This is called from ipath_intr() at interrupt level when a PIO buffer is
 562  * available after ipath_verbs_send() returned an error that no buffers were
 563  * available.  Return 1 if we consumed all the PIO buffers and we still have
 564  * QPs waiting for buffers (for now, just do a tasklet_hi_schedule and
 565  * return zero).
 566  */
 567 static int ipath_ib_piobufavail(void *arg)
 568 {
 569         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
 570         struct ipath_qp *qp;
 571         unsigned long flags;
 572
 573         if (dev == NULL)
 574                 goto bail;
 575
 576         spin_lock_irqsave(&dev->pending_lock, flags);
 577         while (!list_empty(&dev->piowait)) {
 578                 qp = list_entry(dev->piowait.next, struct ipath_qp,
 579                                 piowait);
 580                 list_del_init(&qp->piowait);
 581                 tasklet_hi_schedule(&qp->s_task);
 582         }
 583         spin_unlock_irqrestore(&dev->pending_lock, flags);
 584
 585 bail:
 586         return 0;
 587 }
 588
 589 static int ipath_query_device(struct ib_device *ibdev,
 590                               struct ib_device_attr *props)
 591 {
 592         struct ipath_ibdev *dev = to_idev(ibdev);
 593
 594         memset(props, 0, sizeof(*props));
 595
 596         props->device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR |
 597                 IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT |
 598                 IB_DEVICE_SYS_IMAGE_GUID;
 599         props->page_size_cap = PAGE_SIZE;
 600         props->vendor_id = ipath_layer_get_vendorid(dev->dd);
 601         props->vendor_part_id = ipath_layer_get_deviceid(dev->dd);
 602         props->hw_ver = ipath_layer_get_pcirev(dev->dd);
 603
 604         props->sys_image_guid = dev->sys_image_guid;
 605
 606         props->max_mr_size = ~0ull;
 607         props->max_qp = dev->qp_table.max;
 608         props->max_qp_wr = ib_ipath_max_qp_wrs;
 609         props->max_sge = ib_ipath_max_sges;
 610         props->max_cq = ib_ipath_max_cqs;
 611         props->max_ah = ib_ipath_max_ahs;
 612         props->max_cqe = ib_ipath_max_cqes;
 613         props->max_mr = dev->lk_table.max;
 614         props->max_pd = ib_ipath_max_pds;
 615         props->max_qp_rd_atom = 1;
 616         props->max_qp_init_rd_atom = 1;
 617         /* props->max_res_rd_atom */
 618         props->max_srq = ib_ipath_max_srqs;
 619         props->max_srq_wr = ib_ipath_max_srq_wrs;
 620         props->max_srq_sge = ib_ipath_max_srq_sges;
 621         /* props->local_ca_ack_delay */
 622         props->atomic_cap = IB_ATOMIC_HCA;
 623         props->max_pkeys = ipath_layer_get_npkeys(dev->dd);
 624         props->max_mcast_grp = ib_ipath_max_mcast_grps;
 625         props->max_mcast_qp_attach = ib_ipath_max_mcast_qp_attached;
 626         props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
 627                 props->max_mcast_grp;
 628
 629         return 0;
 630 }
 631
 632 const u8 ipath_cvt_physportstate[16] = {
 633         [INFINIPATH_IBCS_LT_STATE_DISABLED] = 3,
 634         [INFINIPATH_IBCS_LT_STATE_LINKUP] = 5,
 635         [INFINIPATH_IBCS_LT_STATE_POLLACTIVE] = 2,
 636         [INFINIPATH_IBCS_LT_STATE_POLLQUIET] = 2,
 637         [INFINIPATH_IBCS_LT_STATE_SLEEPDELAY] = 1,
 638         [INFINIPATH_IBCS_LT_STATE_SLEEPQUIET] = 1,
 639         [INFINIPATH_IBCS_LT_STATE_CFGDEBOUNCE] = 4,
 640         [INFINIPATH_IBCS_LT_STATE_CFGRCVFCFG] = 4,
 641         [INFINIPATH_IBCS_LT_STATE_CFGWAITRMT] = 4,
 642         [INFINIPATH_IBCS_LT_STATE_CFGIDLE] = 4,
 643         [INFINIPATH_IBCS_LT_STATE_RECOVERRETRAIN] = 6,
 644         [INFINIPATH_IBCS_LT_STATE_RECOVERWAITRMT] = 6,
 645         [INFINIPATH_IBCS_LT_STATE_RECOVERIDLE] = 6,
 646 };
 647
 648 static int ipath_query_port(struct ib_device *ibdev,
 649                             u8 port, struct ib_port_attr *props)
 650 {
 651         struct ipath_ibdev *dev = to_idev(ibdev);
 652         enum ib_mtu mtu;
 653         u16 lid = ipath_layer_get_lid(dev->dd);
 654         u64 ibcstat;
 655
 656         memset(props, 0, sizeof(*props));
 657         props->lid = lid ? lid : __constant_be16_to_cpu(IB_LID_PERMISSIVE);
 658         props->lmc = dev->mkeyprot_resv_lmc & 7;
 659         props->sm_lid = dev->sm_lid;
 660         props->sm_sl = dev->sm_sl;
 661         ibcstat = ipath_layer_get_lastibcstat(dev->dd);
 662         props->state = ((ibcstat >> 4) & 0x3) + 1;
 663         /* See phys_state_show() */
 664         props->phys_state = ipath_cvt_physportstate[
 665                 ipath_layer_get_lastibcstat(dev->dd) & 0xf];
 666         props->port_cap_flags = dev->port_cap_flags;
 667         props->gid_tbl_len = 1;
 668         props->max_msg_sz = 0x80000000;
 669         props->pkey_tbl_len = ipath_layer_get_npkeys(dev->dd);
 670         props->bad_pkey_cntr = ipath_layer_get_cr_errpkey(dev->dd) -
 671                 dev->z_pkey_violations;
 672         props->qkey_viol_cntr = dev->qkey_violations;
 673         props->active_width = IB_WIDTH_4X;
 674         /* See rate_show() */
 675         props->active_speed = 1;        /* Regular 10Mbs speed. */
 676         props->max_vl_num = 1;          /* VLCap = VL0 */
 677         props->init_type_reply = 0;
 678
 679         props->max_mtu = IB_MTU_4096;
 680         switch (ipath_layer_get_ibmtu(dev->dd)) {
 681         case 4096:
 682                 mtu = IB_MTU_4096;
 683                 break;
 684         case 2048:
 685                 mtu = IB_MTU_2048;
 686                 break;
 687         case 1024:
 688                 mtu = IB_MTU_1024;
 689                 break;
 690         case 512:
 691                 mtu = IB_MTU_512;
 692                 break;
 693         case 256:
 694                 mtu = IB_MTU_256;
 695                 break;
 696         default:
 697                 mtu = IB_MTU_2048;
 698         }
 699         props->active_mtu = mtu;
 700         props->subnet_timeout = dev->subnet_timeout;
 701
 702         return 0;
 703 }
 704
 705 static int ipath_modify_device(struct ib_device *device,
 706                                int device_modify_mask,
 707                                struct ib_device_modify *device_modify)
 708 {
 709         int ret;
 710
 711         if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID |
 712                                    IB_DEVICE_MODIFY_NODE_DESC)) {
 713                 ret = -EOPNOTSUPP;
 714                 goto bail;
 715         }
 716
 717         if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC)
 718                 memcpy(device->node_desc, device_modify->node_desc, 64);
 719
 720         if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID)
 721                 to_idev(device)->sys_image_guid =
 722                         cpu_to_be64(device_modify->sys_image_guid);
 723
 724         ret = 0;
 725
 726 bail:
 727         return ret;
 728 }
 729
 730 static int ipath_modify_port(struct ib_device *ibdev,
 731                              u8 port, int port_modify_mask,
 732                              struct ib_port_modify *props)
 733 {
 734         struct ipath_ibdev *dev = to_idev(ibdev);
 735
 736         dev->port_cap_flags |= props->set_port_cap_mask;
 737         dev->port_cap_flags &= ~props->clr_port_cap_mask;
 738         if (port_modify_mask & IB_PORT_SHUTDOWN)
 739                 ipath_layer_set_linkstate(dev->dd, IPATH_IB_LINKDOWN);
 740         if (port_modify_mask & IB_PORT_RESET_QKEY_CNTR)
 741                 dev->qkey_violations = 0;
 742         return 0;
 743 }
 744
 745 static int ipath_query_gid(struct ib_device *ibdev, u8 port,
 746                            int index, union ib_gid *gid)
 747 {
 748         struct ipath_ibdev *dev = to_idev(ibdev);
 749         int ret;
 750
 751         if (index >= 1) {
 752                 ret = -EINVAL;
 753                 goto bail;
 754         }
 755         gid->global.subnet_prefix = dev->gid_prefix;
 756         gid->global.interface_id = ipath_layer_get_guid(dev->dd);
 757
 758         ret = 0;
 759
 760 bail:
 761         return ret;
 762 }
 763
 764 static struct ib_pd *ipath_alloc_pd(struct ib_device *ibdev,
 765                                     struct ib_ucontext *context,
 766                                     struct ib_udata *udata)
 767 {
 768         struct ipath_ibdev *dev = to_idev(ibdev);
 769         struct ipath_pd *pd;
 770         struct ib_pd *ret;
 771
 772         /*
 773          * This is actually totally arbitrary.  Some correctness tests
 774          * assume there's a maximum number of PDs that can be allocated.
 775          * We don't actually have this limit, but we fail the test if
 776          * we allow allocations of more than we report for this value.
 777          */
 778
 779         pd = kmalloc(sizeof *pd, GFP_KERNEL);
 780         if (!pd) {
 781                 ret = ERR_PTR(-ENOMEM);
 782                 goto bail;
 783         }
 784
 785         spin_lock(&dev->n_pds_lock);
 786         if (dev->n_pds_allocated == ib_ipath_max_pds) {
 787                 spin_unlock(&dev->n_pds_lock);
 788                 kfree(pd);
 789                 ret = ERR_PTR(-ENOMEM);
 790                 goto bail;
 791         }
 792
 793         dev->n_pds_allocated++;
 794         spin_unlock(&dev->n_pds_lock);
 795
 796         /* ib_alloc_pd() will initialize pd->ibpd. */
 797         pd->user = udata != NULL;
 798
 799         ret = &pd->ibpd;
 800
 801 bail:
 802         return ret;
 803 }
 804
 805 static int ipath_dealloc_pd(struct ib_pd *ibpd)
 806 {
 807         struct ipath_pd *pd = to_ipd(ibpd);
 808         struct ipath_ibdev *dev = to_idev(ibpd->device);
 809
 810         spin_lock(&dev->n_pds_lock);
 811         dev->n_pds_allocated--;
 812         spin_unlock(&dev->n_pds_lock);
 813
 814         kfree(pd);
 815
 816         return 0;
 817 }
 818
 819 /**
 820  * ipath_create_ah - create an address handle
 821  * @pd: the protection domain
 822  * @ah_attr: the attributes of the AH
 823  *
 824  * This may be called from interrupt context.
 825  */
 826 static struct ib_ah *ipath_create_ah(struct ib_pd *pd,
 827                                      struct ib_ah_attr *ah_attr)
 828 {
 829         struct ipath_ah *ah;
 830         struct ib_ah *ret;
 831         struct ipath_ibdev *dev = to_idev(pd->device);
 832
 833         /* A multicast address requires a GRH (see ch. 8.4.1). */
 834         if (ah_attr->dlid >= IPATH_MULTICAST_LID_BASE &&
 835             ah_attr->dlid != IPATH_PERMISSIVE_LID &&
 836             !(ah_attr->ah_flags & IB_AH_GRH)) {
 837                 ret = ERR_PTR(-EINVAL);
 838                 goto bail;
 839         }
 840
 841         if (ah_attr->dlid == 0) {
 842                 ret = ERR_PTR(-EINVAL);
 843                 goto bail;
 844         }
 845
 846         if (ah_attr->port_num < 1 ||
 847             ah_attr->port_num > pd->device->phys_port_cnt) {
 848                 ret = ERR_PTR(-EINVAL);
 849                 goto bail;
 850         }
 851
 852         ah = kmalloc(sizeof *ah, GFP_ATOMIC);
 853         if (!ah) {
 854                 ret = ERR_PTR(-ENOMEM);
 855                 goto bail;
 856         }
 857
 858         spin_lock(&dev->n_ahs_lock);
 859         if (dev->n_ahs_allocated == ib_ipath_max_ahs) {
 860                 spin_unlock(&dev->n_ahs_lock);
 861                 kfree(ah);
 862                 ret = ERR_PTR(-ENOMEM);
 863                 goto bail;
 864         }
 865
 866         dev->n_ahs_allocated++;
 867         spin_unlock(&dev->n_ahs_lock);
 868
 869         /* ib_create_ah() will initialize ah->ibah. */
 870         ah->attr = *ah_attr;
 871
 872         ret = &ah->ibah;
 873
 874 bail:
 875         return ret;
 876 }
 877
 878 /**
 879  * ipath_destroy_ah - destroy an address handle
 880  * @ibah: the AH to destroy
 881  *
 882  * This may be called from interrupt context.
 883  */
 884 static int ipath_destroy_ah(struct ib_ah *ibah)
 885 {
 886         struct ipath_ibdev *dev = to_idev(ibah->device);
 887         struct ipath_ah *ah = to_iah(ibah);
 888
 889         spin_lock(&dev->n_ahs_lock);
 890         dev->n_ahs_allocated--;
 891         spin_unlock(&dev->n_ahs_lock);
 892
 893         kfree(ah);
 894
 895         return 0;
 896 }
 897
 898 static int ipath_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
 899 {
 900         struct ipath_ah *ah = to_iah(ibah);
 901
 902         *ah_attr = ah->attr;
 903
 904         return 0;
 905 }
 906
 907 static int ipath_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 908                             u16 *pkey)
 909 {
 910         struct ipath_ibdev *dev = to_idev(ibdev);
 911         int ret;
 912
 913         if (index >= ipath_layer_get_npkeys(dev->dd)) {
 914                 ret = -EINVAL;
 915                 goto bail;
 916         }
 917
 918         *pkey = ipath_layer_get_pkey(dev->dd, index);
 919         ret = 0;
 920
 921 bail:
 922         return ret;
 923 }
 924
 925
 926 /**
 927  * ipath_alloc_ucontext - allocate a ucontest
 928  * @ibdev: the infiniband device
 929  * @udata: not used by the InfiniPath driver
 930  */
 931
 932 static struct ib_ucontext *ipath_alloc_ucontext(struct ib_device *ibdev,
 933                                                 struct ib_udata *udata)
 934 {
 935         struct ipath_ucontext *context;
 936         struct ib_ucontext *ret;
 937
 938         context = kmalloc(sizeof *context, GFP_KERNEL);
 939         if (!context) {
 940                 ret = ERR_PTR(-ENOMEM);
 941                 goto bail;
 942         }
 943
 944         ret = &context->ibucontext;
 945
 946 bail:
 947         return ret;
 948 }
 949
 950 static int ipath_dealloc_ucontext(struct ib_ucontext *context)
 951 {
 952         kfree(to_iucontext(context));
 953         return 0;
 954 }
 955
 956 static int ipath_verbs_register_sysfs(struct ib_device *dev);
 957
 958 /**
 959  * ipath_register_ib_device - register our device with the infiniband core
 960  * @unit: the device number to register
 961  * @dd: the device data structure
 962  * Return the allocated ipath_ibdev pointer or NULL on error.
 963  */
 964 static void *ipath_register_ib_device(int unit, struct ipath_devdata *dd)
 965 {
 966         struct ipath_layer_counters cntrs;
 967         struct ipath_ibdev *idev;
 968         struct ib_device *dev;
 969         int ret;
 970
 971         idev = (struct ipath_ibdev *)ib_alloc_device(sizeof *idev);
 972         if (idev == NULL)
 973                 goto bail;
 974
 975         dev = &idev->ibdev;
 976
 977         /* Only need to initialize non-zero fields. */
 978         spin_lock_init(&idev->n_pds_lock);
 979         spin_lock_init(&idev->n_ahs_lock);
 980         spin_lock_init(&idev->n_cqs_lock);
 981         spin_lock_init(&idev->n_srqs_lock);
 982         spin_lock_init(&idev->n_mcast_grps_lock);
 983
 984         spin_lock_init(&idev->qp_table.lock);
 985         spin_lock_init(&idev->lk_table.lock);
 986         idev->sm_lid = __constant_be16_to_cpu(IB_LID_PERMISSIVE);
 987         /* Set the prefix to the default value (see ch. 4.1.1) */
 988         idev->gid_prefix = __constant_cpu_to_be64(0xfe80000000000000ULL);
 989
 990         ret = ipath_init_qp_table(idev, ib_ipath_qp_table_size);
 991         if (ret)
 992                 goto err_qp;
 993
 994         /*
 995          * The top ib_ipath_lkey_table_size bits are used to index the
 996          * table.  The lower 8 bits can be owned by the user (copied from
 997          * the LKEY).  The remaining bits act as a generation number or tag.
 998          */
 999         idev->lk_table.max = 1 << ib_ipath_lkey_table_size;
1000         idev->lk_table.table = kzalloc(idev->lk_table.max *
1001                                        sizeof(*idev->lk_table.table),
1002                                        GFP_KERNEL);
1003         if (idev->lk_table.table == NULL) {
1004                 ret = -ENOMEM;
1005                 goto err_lk;
1006         }
1007         spin_lock_init(&idev->pending_lock);
1008         INIT_LIST_HEAD(&idev->pending[0]);
1009         INIT_LIST_HEAD(&idev->pending[1]);
1010         INIT_LIST_HEAD(&idev->pending[2]);
1011         INIT_LIST_HEAD(&idev->piowait);
1012         INIT_LIST_HEAD(&idev->rnrwait);
1013         idev->pending_index = 0;
1014         idev->port_cap_flags =
1015                 IB_PORT_SYS_IMAGE_GUID_SUP | IB_PORT_CLIENT_REG_SUP;
1016         idev->pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA;
1017         idev->pma_counter_select[1] = IB_PMA_PORT_RCV_DATA;
1018         idev->pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS;
1019         idev->pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS;
1020         idev->pma_counter_select[5] = IB_PMA_PORT_XMIT_WAIT;
1021         idev->link_width_enabled = 3;   /* 1x or 4x */
1022
1023         /* Snapshot current HW counters to "clear" them. */
1024         ipath_layer_get_counters(dd, &cntrs);
1025         idev->z_symbol_error_counter = cntrs.symbol_error_counter;
1026         idev->z_link_error_recovery_counter =
1027                 cntrs.link_error_recovery_counter;
1028         idev->z_link_downed_counter = cntrs.link_downed_counter;
1029         idev->z_port_rcv_errors = cntrs.port_rcv_errors;
1030         idev->z_port_rcv_remphys_errors =
1031                 cntrs.port_rcv_remphys_errors;
1032         idev->z_port_xmit_discards = cntrs.port_xmit_discards;
1033         idev->z_port_xmit_data = cntrs.port_xmit_data;
1034         idev->z_port_rcv_data = cntrs.port_rcv_data;
1035         idev->z_port_xmit_packets = cntrs.port_xmit_packets;
1036         idev->z_port_rcv_packets = cntrs.port_rcv_packets;
1037         idev->z_local_link_integrity_errors =
1038                 cntrs.local_link_integrity_errors;
1039         idev->z_excessive_buffer_overrun_errors =
1040                 cntrs.excessive_buffer_overrun_errors;
1041
1042         /*
1043          * The system image GUID is supposed to be the same for all
1044          * IB HCAs in a single system but since there can be other
1045          * device types in the system, we can't be sure this is unique.
1046          */
1047         if (!sys_image_guid)
1048                 sys_image_guid = ipath_layer_get_guid(dd);
1049         idev->sys_image_guid = sys_image_guid;
1050         idev->ib_unit = unit;
1051         idev->dd = dd;
1052
1053         strlcpy(dev->name, "ipath%d", IB_DEVICE_NAME_MAX);
1054         dev->owner = THIS_MODULE;
1055         dev->node_guid = ipath_layer_get_guid(dd);
1056         dev->uverbs_abi_ver = IPATH_UVERBS_ABI_VERSION;
1057         dev->uverbs_cmd_mask =
1058                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
1059                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
1060                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
1061                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
1062                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
1063                 (1ull << IB_USER_VERBS_CMD_CREATE_AH)           |
1064                 (1ull << IB_USER_VERBS_CMD_DESTROY_AH)          |
1065                 (1ull << IB_USER_VERBS_CMD_QUERY_AH)            |
1066                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
1067                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
1068                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
1069                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
1070                 (1ull << IB_USER_VERBS_CMD_RESIZE_CQ)           |
1071                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
1072                 (1ull << IB_USER_VERBS_CMD_POLL_CQ)             |
1073                 (1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ)       |
1074                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
1075                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
1076                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
1077                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
1078                 (1ull << IB_USER_VERBS_CMD_POST_SEND)           |
1079                 (1ull << IB_USER_VERBS_CMD_POST_RECV)           |
1080                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
1081                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
1082                 (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
1083                 (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
1084                 (1ull << IB_USER_VERBS_CMD_QUERY_SRQ)           |
1085                 (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ)         |
1086                 (1ull << IB_USER_VERBS_CMD_POST_SRQ_RECV);
1087         dev->node_type = IB_NODE_CA;
1088         dev->phys_port_cnt = 1;
1089         dev->dma_device = ipath_layer_get_device(dd);
1090         dev->class_dev.dev = dev->dma_device;
1091         dev->query_device = ipath_query_device;
1092         dev->modify_device = ipath_modify_device;
1093         dev->query_port = ipath_query_port;
1094         dev->modify_port = ipath_modify_port;
1095         dev->query_pkey = ipath_query_pkey;
1096         dev->query_gid = ipath_query_gid;
1097         dev->alloc_ucontext = ipath_alloc_ucontext;
1098         dev->dealloc_ucontext = ipath_dealloc_ucontext;
1099         dev->alloc_pd = ipath_alloc_pd;
1100         dev->dealloc_pd = ipath_dealloc_pd;
1101         dev->create_ah = ipath_create_ah;
1102         dev->destroy_ah = ipath_destroy_ah;
1103         dev->query_ah = ipath_query_ah;
1104         dev->create_srq = ipath_create_srq;
1105         dev->modify_srq = ipath_modify_srq;
1106         dev->query_srq = ipath_query_srq;
1107         dev->destroy_srq = ipath_destroy_srq;
1108         dev->create_qp = ipath_create_qp;
1109         dev->modify_qp = ipath_modify_qp;
1110         dev->query_qp = ipath_query_qp;
1111         dev->destroy_qp = ipath_destroy_qp;
1112         dev->post_send = ipath_post_send;
1113         dev->post_recv = ipath_post_receive;
1114         dev->post_srq_recv = ipath_post_srq_receive;
1115         dev->create_cq = ipath_create_cq;
1116         dev->destroy_cq = ipath_destroy_cq;
1117         dev->resize_cq = ipath_resize_cq;
1118         dev->poll_cq = ipath_poll_cq;
1119         dev->req_notify_cq = ipath_req_notify_cq;
1120         dev->get_dma_mr = ipath_get_dma_mr;
1121         dev->reg_phys_mr = ipath_reg_phys_mr;
1122         dev->reg_user_mr = ipath_reg_user_mr;
1123         dev->dereg_mr = ipath_dereg_mr;
1124         dev->alloc_fmr = ipath_alloc_fmr;
1125         dev->map_phys_fmr = ipath_map_phys_fmr;
1126         dev->unmap_fmr = ipath_unmap_fmr;
1127         dev->dealloc_fmr = ipath_dealloc_fmr;
1128         dev->attach_mcast = ipath_multicast_attach;
1129         dev->detach_mcast = ipath_multicast_detach;
1130         dev->process_mad = ipath_process_mad;
1131         dev->mmap = ipath_mmap;
1132
1133         snprintf(dev->node_desc, sizeof(dev->node_desc),
1134                  IPATH_IDSTR " %s kernel_SMA", system_utsname.nodename);
1135
1136         ret = ib_register_device(dev);
1137         if (ret)
1138                 goto err_reg;
1139
1140         if (ipath_verbs_register_sysfs(dev))
1141                 goto err_class;
1142
1143         ipath_layer_enable_timer(dd);
1144
1145         goto bail;
1146
1147 err_class:
1148         ib_unregister_device(dev);
1149 err_reg:
1150         kfree(idev->lk_table.table);
1151 err_lk:
1152         kfree(idev->qp_table.table);
1153 err_qp:
1154         ib_dealloc_device(dev);
1155         _VERBS_ERROR("ib_ipath%d cannot register verbs (%d)!\n",
1156                      unit, -ret);
1157         idev = NULL;
1158
1159 bail:
1160         return idev;
1161 }
1162
1163 static void ipath_unregister_ib_device(void *arg)
1164 {
1165         struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
1166         struct ib_device *ibdev = &dev->ibdev;
1167
1168         ipath_layer_disable_timer(dev->dd);
1169
1170         ib_unregister_device(ibdev);
1171
1172         if (!list_empty(&dev->pending[0]) ||
1173             !list_empty(&dev->pending[1]) ||
1174             !list_empty(&dev->pending[2]))
1175                 _VERBS_ERROR("ipath%d pending list not empty!\n",
1176                              dev->ib_unit);
1177         if (!list_empty(&dev->piowait))
1178                 _VERBS_ERROR("ipath%d piowait list not empty!\n",
1179                              dev->ib_unit);
1180         if (!list_empty(&dev->rnrwait))
1181                 _VERBS_ERROR("ipath%d rnrwait list not empty!\n",
1182                              dev->ib_unit);
1183         if (!ipath_mcast_tree_empty())
1184                 _VERBS_ERROR("ipath%d multicast table memory leak!\n",
1185                              dev->ib_unit);
1186         /*
1187          * Note that ipath_unregister_ib_device() can be called before all
1188          * the QPs are destroyed!
1189          */
1190         ipath_free_all_qps(&dev->qp_table);
1191         kfree(dev->qp_table.table);
1192         kfree(dev->lk_table.table);
1193         ib_dealloc_device(ibdev);
1194 }
1195
1196 static int __init ipath_verbs_init(void)
1197 {
1198         return ipath_verbs_register(ipath_register_ib_device,
1199                                     ipath_unregister_ib_device,
1200                                     ipath_ib_piobufavail, ipath_ib_rcv,
1201                                     ipath_ib_timer);
1202 }
1203
1204 static void __exit ipath_verbs_cleanup(void)
1205 {
1206         ipath_verbs_unregister();
1207 }
1208
1209 static ssize_t show_rev(struct class_device *cdev, char *buf)
1210 {
1211         struct ipath_ibdev *dev =
1212                 container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
1213
1214         return sprintf(buf, "%x\n", ipath_layer_get_pcirev(dev->dd));
1215 }
1216
1217 static ssize_t show_hca(struct class_device *cdev, char *buf)
1218 {
1219         struct ipath_ibdev *dev =
1220                 container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
1221         int ret;
1222
1223         ret = ipath_layer_get_boardname(dev->dd, buf, 128);
1224         if (ret < 0)
1225                 goto bail;
1226         strcat(buf, "\n");
1227         ret = strlen(buf);
1228
1229 bail:
1230         return ret;
1231 }
1232
1233 static ssize_t show_stats(struct class_device *cdev, char *buf)
1234 {
1235         struct ipath_ibdev *dev =
1236                 container_of(cdev, struct ipath_ibdev, ibdev.class_dev);
1237         int i;
1238         int len;
1239
1240         len = sprintf(buf,
1241                       "RC resends  %d\n"
1242                       "RC no QACK  %d\n"
1243                       "RC ACKs     %d\n"
1244                       "RC SEQ NAKs %d\n"
1245                       "RC RDMA seq %d\n"
1246                       "RC RNR NAKs %d\n"
1247                       "RC OTH NAKs %d\n"
1248                       "RC timeouts %d\n"
1249                       "RC RDMA dup %d\n"
1250                       "piobuf wait %d\n"
1251                       "no piobuf   %d\n"
1252                       "PKT drops   %d\n"
1253                       "WQE errs    %d\n",
1254                       dev->n_rc_resends, dev->n_rc_qacks, dev->n_rc_acks,
1255                       dev->n_seq_naks, dev->n_rdma_seq, dev->n_rnr_naks,
1256                       dev->n_other_naks, dev->n_timeouts,
1257                       dev->n_rdma_dup_busy, dev->n_piowait,
1258                       dev->n_no_piobuf, dev->n_pkt_drops, dev->n_wqe_errs);
1259         for (i = 0; i < ARRAY_SIZE(dev->opstats); i++) {
1260                 const struct ipath_opcode_stats *si = &dev->opstats[i];
1261
1262                 if (!si->n_packets && !si->n_bytes)
1263                         continue;
1264                 len += sprintf(buf + len, "%02x %llu/%llu\n", i,
1265                                (unsigned long long) si->n_packets,
1266                                (unsigned long long) si->n_bytes);
1267         }
1268         return len;
1269 }
1270
1271 static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
1272 static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
1273 static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_hca, NULL);
1274 static CLASS_DEVICE_ATTR(stats, S_IRUGO, show_stats, NULL);
1275
1276 static struct class_device_attribute *ipath_class_attributes[] = {
1277         &class_device_attr_hw_rev,
1278         &class_device_attr_hca_type,
1279         &class_device_attr_board_id,
1280         &class_device_attr_stats
1281 };
1282
1283 static int ipath_verbs_register_sysfs(struct ib_device *dev)
1284 {
1285         int i;
1286         int ret;
1287
1288         for (i = 0; i < ARRAY_SIZE(ipath_class_attributes); ++i)
1289                 if (class_device_create_file(&dev->class_dev,
1290                                              ipath_class_attributes[i])) {
1291                         ret = 1;
1292                         goto bail;
1293                 }
1294
1295         ret = 0;
1296
1297 bail:
1298         return ret;
1299 }
1300
1301 module_init(ipath_verbs_init);
1302 module_exit(ipath_verbs_cleanup);