drivers/infiniband/hw/hfi1/driver.c

   1 /*
   2  * Copyright(c) 2015-2018 Intel Corporation.
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * BSD LICENSE
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions
  22  * are met:
  23  *
  24  *  - Redistributions of source code must retain the above copyright
  25  *    notice, this list of conditions and the following disclaimer.
  26  *  - Redistributions in binary form must reproduce the above copyright
  27  *    notice, this list of conditions and the following disclaimer in
  28  *    the documentation and/or other materials provided with the
  29  *    distribution.
  30  *  - Neither the name of Intel Corporation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45  *
  46  */
  47
  48 #include <linux/spinlock.h>
  49 #include <linux/pci.h>
  50 #include <linux/io.h>
  51 #include <linux/delay.h>
  52 #include <linux/netdevice.h>
  53 #include <linux/vmalloc.h>
  54 #include <linux/module.h>
  55 #include <linux/prefetch.h>
  56 #include <rdma/ib_verbs.h>
  57
  58 #include "hfi.h"
  59 #include "trace.h"
  60 #include "qp.h"
  61 #include "sdma.h"
  62 #include "debugfs.h"
  63 #include "vnic.h"
  64 #include "fault.h"
  65
  66 #undef pr_fmt
  67 #define pr_fmt(fmt) DRIVER_NAME ": " fmt
  68
  69 /*
  70  * The size has to be longer than this string, so we can append
  71  * board/chip information to it in the initialization code.
  72  */
  73 const char ib_hfi1_version[] = HFI1_DRIVER_VERSION "\n";
  74
  75 DEFINE_MUTEX(hfi1_mutex);       /* general driver use */
  76
  77 unsigned int hfi1_max_mtu = HFI1_DEFAULT_MAX_MTU;
  78 module_param_named(max_mtu, hfi1_max_mtu, uint, S_IRUGO);
  79 MODULE_PARM_DESC(max_mtu, "Set max MTU bytes, default is " __stringify(
  80                  HFI1_DEFAULT_MAX_MTU));
  81
  82 unsigned int hfi1_cu = 1;
  83 module_param_named(cu, hfi1_cu, uint, S_IRUGO);
  84 MODULE_PARM_DESC(cu, "Credit return units");
  85
  86 unsigned long hfi1_cap_mask = HFI1_CAP_MASK_DEFAULT;
  87 static int hfi1_caps_set(const char *val, const struct kernel_param *kp);
  88 static int hfi1_caps_get(char *buffer, const struct kernel_param *kp);
  89 static const struct kernel_param_ops cap_ops = {
  90         .set = hfi1_caps_set,
  91         .get = hfi1_caps_get
  92 };
  93 module_param_cb(cap_mask, &cap_ops, &hfi1_cap_mask, S_IWUSR | S_IRUGO);
  94 MODULE_PARM_DESC(cap_mask, "Bit mask of enabled/disabled HW features");
  95
  96 MODULE_LICENSE("Dual BSD/GPL");
  97 MODULE_DESCRIPTION("Intel Omni-Path Architecture driver");
  98
  99 /*
 100  * MAX_PKT_RCV is the max # if packets processed per receive interrupt.
 101  */
 102 #define MAX_PKT_RECV 64
 103 /*
 104  * MAX_PKT_THREAD_RCV is the max # of packets processed before
 105  * the qp_wait_list queue is flushed.
 106  */
 107 #define MAX_PKT_RECV_THREAD (MAX_PKT_RECV * 4)
 108 #define EGR_HEAD_UPDATE_THRESHOLD 16
 109
 110 struct hfi1_ib_stats hfi1_stats;
 111
 112 static int hfi1_caps_set(const char *val, const struct kernel_param *kp)
 113 {
 114         int ret = 0;
 115         unsigned long *cap_mask_ptr = (unsigned long *)kp->arg,
 116                 cap_mask = *cap_mask_ptr, value, diff,
 117                 write_mask = ((HFI1_CAP_WRITABLE_MASK << HFI1_CAP_USER_SHIFT) |
 118                               HFI1_CAP_WRITABLE_MASK);
 119
 120         ret = kstrtoul(val, 0, &value);
 121         if (ret) {
 122                 pr_warn("Invalid module parameter value for 'cap_mask'\n");
 123                 goto done;
 124         }
 125         /* Get the changed bits (except the locked bit) */
 126         diff = value ^ (cap_mask & ~HFI1_CAP_LOCKED_SMASK);
 127
 128         /* Remove any bits that are not allowed to change after driver load */
 129         if (HFI1_CAP_LOCKED() && (diff & ~write_mask)) {
 130                 pr_warn("Ignoring non-writable capability bits %#lx\n",
 131                         diff & ~write_mask);
 132                 diff &= write_mask;
 133         }
 134
 135         /* Mask off any reserved bits */
 136         diff &= ~HFI1_CAP_RESERVED_MASK;
 137         /* Clear any previously set and changing bits */
 138         cap_mask &= ~diff;
 139         /* Update the bits with the new capability */
 140         cap_mask |= (value & diff);
 141         /* Check for any kernel/user restrictions */
 142         diff = (cap_mask & (HFI1_CAP_MUST_HAVE_KERN << HFI1_CAP_USER_SHIFT)) ^
 143                 ((cap_mask & HFI1_CAP_MUST_HAVE_KERN) << HFI1_CAP_USER_SHIFT);
 144         cap_mask &= ~diff;
 145         /* Set the bitmask to the final set */
 146         *cap_mask_ptr = cap_mask;
 147 done:
 148         return ret;
 149 }
 150
 151 static int hfi1_caps_get(char *buffer, const struct kernel_param *kp)
 152 {
 153         unsigned long cap_mask = *(unsigned long *)kp->arg;
 154
 155         cap_mask &= ~HFI1_CAP_LOCKED_SMASK;
 156         cap_mask |= ((cap_mask & HFI1_CAP_K2U) << HFI1_CAP_USER_SHIFT);
 157
 158         return scnprintf(buffer, PAGE_SIZE, "0x%lx", cap_mask);
 159 }
 160
 161 struct pci_dev *get_pci_dev(struct rvt_dev_info *rdi)
 162 {
 163         struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi);
 164         struct hfi1_devdata *dd = container_of(ibdev,
 165                                                struct hfi1_devdata, verbs_dev);
 166         return dd->pcidev;
 167 }
 168
 169 /*
 170  * Return count of units with at least one port ACTIVE.
 171  */
 172 int hfi1_count_active_units(void)
 173 {
 174         struct hfi1_devdata *dd;
 175         struct hfi1_pportdata *ppd;
 176         unsigned long index, flags;
 177         int pidx, nunits_active = 0;
 178
 179         xa_lock_irqsave(&hfi1_dev_table, flags);
 180         xa_for_each(&hfi1_dev_table, index, dd) {
 181                 if (!(dd->flags & HFI1_PRESENT) || !dd->kregbase1)
 182                         continue;
 183                 for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 184                         ppd = dd->pport + pidx;
 185                         if (ppd->lid && ppd->linkup) {
 186                                 nunits_active++;
 187                                 break;
 188                         }
 189                 }
 190         }
 191         xa_unlock_irqrestore(&hfi1_dev_table, flags);
 192         return nunits_active;
 193 }
 194
 195 /*
 196  * Get address of eager buffer from it's index (allocated in chunks, not
 197  * contiguous).
 198  */
 199 static inline void *get_egrbuf(const struct hfi1_ctxtdata *rcd, u64 rhf,
 200                                u8 *update)
 201 {
 202         u32 idx = rhf_egr_index(rhf), offset = rhf_egr_buf_offset(rhf);
 203
 204         *update |= !(idx & (rcd->egrbufs.threshold - 1)) && !offset;
 205         return (void *)(((u64)(rcd->egrbufs.rcvtids[idx].addr)) +
 206                         (offset * RCV_BUF_BLOCK_SIZE));
 207 }
 208
 209 static inline void *hfi1_get_header(struct hfi1_ctxtdata *rcd,
 210                                     __le32 *rhf_addr)
 211 {
 212         u32 offset = rhf_hdrq_offset(rhf_to_cpu(rhf_addr));
 213
 214         return (void *)(rhf_addr - rcd->rhf_offset + offset);
 215 }
 216
 217 static inline struct ib_header *hfi1_get_msgheader(struct hfi1_ctxtdata *rcd,
 218                                                    __le32 *rhf_addr)
 219 {
 220         return (struct ib_header *)hfi1_get_header(rcd, rhf_addr);
 221 }
 222
 223 static inline struct hfi1_16b_header
 224                 *hfi1_get_16B_header(struct hfi1_ctxtdata *rcd,
 225                                      __le32 *rhf_addr)
 226 {
 227         return (struct hfi1_16b_header *)hfi1_get_header(rcd, rhf_addr);
 228 }
 229
 230 /*
 231  * Validate and encode the a given RcvArray Buffer size.
 232  * The function will check whether the given size falls within
 233  * allowed size ranges for the respective type and, optionally,
 234  * return the proper encoding.
 235  */
 236 int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encoded)
 237 {
 238         if (unlikely(!PAGE_ALIGNED(size)))
 239                 return 0;
 240         if (unlikely(size < MIN_EAGER_BUFFER))
 241                 return 0;
 242         if (size >
 243             (type == PT_EAGER ? MAX_EAGER_BUFFER : MAX_EXPECTED_BUFFER))
 244                 return 0;
 245         if (encoded)
 246                 *encoded = ilog2(size / PAGE_SIZE) + 1;
 247         return 1;
 248 }
 249
 250 static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
 251                        struct hfi1_packet *packet)
 252 {
 253         struct ib_header *rhdr = packet->hdr;
 254         u32 rte = rhf_rcv_type_err(packet->rhf);
 255         u32 mlid_base;
 256         struct hfi1_ibport *ibp = rcd_to_iport(rcd);
 257         struct hfi1_devdata *dd = ppd->dd;
 258         struct hfi1_ibdev *verbs_dev = &dd->verbs_dev;
 259         struct rvt_dev_info *rdi = &verbs_dev->rdi;
 260
 261         if ((packet->rhf & RHF_DC_ERR) &&
 262             hfi1_dbg_fault_suppress_err(verbs_dev))
 263                 return;
 264
 265         if (packet->rhf & RHF_ICRC_ERR)
 266                 return;
 267
 268         if (packet->etype == RHF_RCV_TYPE_BYPASS) {
 269                 goto drop;
 270         } else {
 271                 u8 lnh = ib_get_lnh(rhdr);
 272
 273                 mlid_base = be16_to_cpu(IB_MULTICAST_LID_BASE);
 274                 if (lnh == HFI1_LRH_BTH) {
 275                         packet->ohdr = &rhdr->u.oth;
 276                 } else if (lnh == HFI1_LRH_GRH) {
 277                         packet->ohdr = &rhdr->u.l.oth;
 278                         packet->grh = &rhdr->u.l.grh;
 279                 } else {
 280                         goto drop;
 281                 }
 282         }
 283
 284         if (packet->rhf & RHF_TID_ERR) {
 285                 /* For TIDERR and RC QPs preemptively schedule a NAK */
 286                 u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */
 287                 u32 dlid = ib_get_dlid(rhdr);
 288                 u32 qp_num;
 289
 290                 /* Sanity check packet */
 291                 if (tlen < 24)
 292                         goto drop;
 293
 294                 /* Check for GRH */
 295                 if (packet->grh) {
 296                         u32 vtf;
 297                         struct ib_grh *grh = packet->grh;
 298
 299                         if (grh->next_hdr != IB_GRH_NEXT_HDR)
 300                                 goto drop;
 301                         vtf = be32_to_cpu(grh->version_tclass_flow);
 302                         if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
 303                                 goto drop;
 304                 }
 305
 306                 /* Get the destination QP number. */
 307                 qp_num = ib_bth_get_qpn(packet->ohdr);
 308                 if (dlid < mlid_base) {
 309                         struct rvt_qp *qp;
 310                         unsigned long flags;
 311
 312                         rcu_read_lock();
 313                         qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
 314                         if (!qp) {
 315                                 rcu_read_unlock();
 316                                 goto drop;
 317                         }
 318
 319                         /*
 320                          * Handle only RC QPs - for other QP types drop error
 321                          * packet.
 322                          */
 323                         spin_lock_irqsave(&qp->r_lock, flags);
 324
 325                         /* Check for valid receive state. */
 326                         if (!(ib_rvt_state_ops[qp->state] &
 327                               RVT_PROCESS_RECV_OK)) {
 328                                 ibp->rvp.n_pkt_drops++;
 329                         }
 330
 331                         switch (qp->ibqp.qp_type) {
 332                         case IB_QPT_RC:
 333                                 hfi1_rc_hdrerr(rcd, packet, qp);
 334                                 break;
 335                         default:
 336                                 /* For now don't handle any other QP types */
 337                                 break;
 338                         }
 339
 340                         spin_unlock_irqrestore(&qp->r_lock, flags);
 341                         rcu_read_unlock();
 342                 } /* Unicast QP */
 343         } /* Valid packet with TIDErr */
 344
 345         /* handle "RcvTypeErr" flags */
 346         switch (rte) {
 347         case RHF_RTE_ERROR_OP_CODE_ERR:
 348         {
 349                 void *ebuf = NULL;
 350                 u8 opcode;
 351
 352                 if (rhf_use_egr_bfr(packet->rhf))
 353                         ebuf = packet->ebuf;
 354
 355                 if (!ebuf)
 356                         goto drop; /* this should never happen */
 357
 358                 opcode = ib_bth_get_opcode(packet->ohdr);
 359                 if (opcode == IB_OPCODE_CNP) {
 360                         /*
 361                          * Only in pre-B0 h/w is the CNP_OPCODE handled
 362                          * via this code path.
 363                          */
 364                         struct rvt_qp *qp = NULL;
 365                         u32 lqpn, rqpn;
 366                         u16 rlid;
 367                         u8 svc_type, sl, sc5;
 368
 369                         sc5 = hfi1_9B_get_sc5(rhdr, packet->rhf);
 370                         sl = ibp->sc_to_sl[sc5];
 371
 372                         lqpn = ib_bth_get_qpn(packet->ohdr);
 373                         rcu_read_lock();
 374                         qp = rvt_lookup_qpn(rdi, &ibp->rvp, lqpn);
 375                         if (!qp) {
 376                                 rcu_read_unlock();
 377                                 goto drop;
 378                         }
 379
 380                         switch (qp->ibqp.qp_type) {
 381                         case IB_QPT_UD:
 382                                 rlid = 0;
 383                                 rqpn = 0;
 384                                 svc_type = IB_CC_SVCTYPE_UD;
 385                                 break;
 386                         case IB_QPT_UC:
 387                                 rlid = ib_get_slid(rhdr);
 388                                 rqpn = qp->remote_qpn;
 389                                 svc_type = IB_CC_SVCTYPE_UC;
 390                                 break;
 391                         default:
 392                                 rcu_read_unlock();
 393                                 goto drop;
 394                         }
 395
 396                         process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
 397                         rcu_read_unlock();
 398                 }
 399
 400                 packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK;
 401                 break;
 402         }
 403         default:
 404                 break;
 405         }
 406
 407 drop:
 408         return;
 409 }
 410
 411 static inline void init_packet(struct hfi1_ctxtdata *rcd,
 412                                struct hfi1_packet *packet)
 413 {
 414         packet->rsize = get_hdrqentsize(rcd); /* words */
 415         packet->maxcnt = get_hdrq_cnt(rcd) * packet->rsize; /* words */
 416         packet->rcd = rcd;
 417         packet->updegr = 0;
 418         packet->etail = -1;
 419         packet->rhf_addr = get_rhf_addr(rcd);
 420         packet->rhf = rhf_to_cpu(packet->rhf_addr);
 421         packet->rhqoff = hfi1_rcd_head(rcd);
 422         packet->numpkt = 0;
 423 }
 424
 425 /* We support only two types - 9B and 16B for now */
 426 static const hfi1_handle_cnp hfi1_handle_cnp_tbl[2] = {
 427         [HFI1_PKT_TYPE_9B] = &return_cnp,
 428         [HFI1_PKT_TYPE_16B] = &return_cnp_16B
 429 };
 430
 431 /**
 432  * hfi1_process_ecn_slowpath - Process FECN or BECN bits
 433  * @qp: The packet's destination QP
 434  * @pkt: The packet itself.
 435  * @prescan: Is the caller the RXQ prescan
 436  *
 437  * Process the packet's FECN or BECN bits. By now, the packet
 438  * has already been evaluated whether processing of those bit should
 439  * be done.
 440  * The significance of the @prescan argument is that if the caller
 441  * is the RXQ prescan, a CNP will be send out instead of waiting for the
 442  * normal packet processing to send an ACK with BECN set (or a CNP).
 443  */
 444 bool hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt,
 445                                bool prescan)
 446 {
 447         struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
 448         struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
 449         struct ib_other_headers *ohdr = pkt->ohdr;
 450         struct ib_grh *grh = pkt->grh;
 451         u32 rqpn = 0;
 452         u16 pkey;
 453         u32 rlid, slid, dlid = 0;
 454         u8 hdr_type, sc, svc_type, opcode;
 455         bool is_mcast = false, ignore_fecn = false, do_cnp = false,
 456                 fecn, becn;
 457
 458         /* can be called from prescan */
 459         if (pkt->etype == RHF_RCV_TYPE_BYPASS) {
 460                 pkey = hfi1_16B_get_pkey(pkt->hdr);
 461                 sc = hfi1_16B_get_sc(pkt->hdr);
 462                 dlid = hfi1_16B_get_dlid(pkt->hdr);
 463                 slid = hfi1_16B_get_slid(pkt->hdr);
 464                 is_mcast = hfi1_is_16B_mcast(dlid);
 465                 opcode = ib_bth_get_opcode(ohdr);
 466                 hdr_type = HFI1_PKT_TYPE_16B;
 467                 fecn = hfi1_16B_get_fecn(pkt->hdr);
 468                 becn = hfi1_16B_get_becn(pkt->hdr);
 469         } else {
 470                 pkey = ib_bth_get_pkey(ohdr);
 471                 sc = hfi1_9B_get_sc5(pkt->hdr, pkt->rhf);
 472                 dlid = qp->ibqp.qp_type != IB_QPT_UD ? ib_get_dlid(pkt->hdr) :
 473                         ppd->lid;
 474                 slid = ib_get_slid(pkt->hdr);
 475                 is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
 476                            (dlid != be16_to_cpu(IB_LID_PERMISSIVE));
 477                 opcode = ib_bth_get_opcode(ohdr);
 478                 hdr_type = HFI1_PKT_TYPE_9B;
 479                 fecn = ib_bth_get_fecn(ohdr);
 480                 becn = ib_bth_get_becn(ohdr);
 481         }
 482
 483         switch (qp->ibqp.qp_type) {
 484         case IB_QPT_UD:
 485                 rlid = slid;
 486                 rqpn = ib_get_sqpn(pkt->ohdr);
 487                 svc_type = IB_CC_SVCTYPE_UD;
 488                 break;
 489         case IB_QPT_SMI:
 490         case IB_QPT_GSI:
 491                 rlid = slid;
 492                 rqpn = ib_get_sqpn(pkt->ohdr);
 493                 svc_type = IB_CC_SVCTYPE_UD;
 494                 break;
 495         case IB_QPT_UC:
 496                 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
 497                 rqpn = qp->remote_qpn;
 498                 svc_type = IB_CC_SVCTYPE_UC;
 499                 break;
 500         case IB_QPT_RC:
 501                 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
 502                 rqpn = qp->remote_qpn;
 503                 svc_type = IB_CC_SVCTYPE_RC;
 504                 break;
 505         default:
 506                 return false;
 507         }
 508
 509         ignore_fecn = is_mcast || (opcode == IB_OPCODE_CNP) ||
 510                 (opcode == IB_OPCODE_RC_ACKNOWLEDGE);
 511         /*
 512          * ACKNOWLEDGE packets do not get a CNP but this will be
 513          * guarded by ignore_fecn above.
 514          */
 515         do_cnp = prescan ||
 516                 (opcode >= IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST &&
 517                  opcode <= IB_OPCODE_RC_ATOMIC_ACKNOWLEDGE) ||
 518                 opcode == TID_OP(READ_RESP) ||
 519                 opcode == TID_OP(ACK);
 520
 521         /* Call appropriate CNP handler */
 522         if (!ignore_fecn && do_cnp && fecn)
 523                 hfi1_handle_cnp_tbl[hdr_type](ibp, qp, rqpn, pkey,
 524                                               dlid, rlid, sc, grh);
 525
 526         if (becn) {
 527                 u32 lqpn = be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK;
 528                 u8 sl = ibp->sc_to_sl[sc];
 529
 530                 process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
 531         }
 532         return !ignore_fecn && fecn;
 533 }
 534
 535 struct ps_mdata {
 536         struct hfi1_ctxtdata *rcd;
 537         u32 rsize;
 538         u32 maxcnt;
 539         u32 ps_head;
 540         u32 ps_tail;
 541         u32 ps_seq;
 542 };
 543
 544 static inline void init_ps_mdata(struct ps_mdata *mdata,
 545                                  struct hfi1_packet *packet)
 546 {
 547         struct hfi1_ctxtdata *rcd = packet->rcd;
 548
 549         mdata->rcd = rcd;
 550         mdata->rsize = packet->rsize;
 551         mdata->maxcnt = packet->maxcnt;
 552         mdata->ps_head = packet->rhqoff;
 553
 554         if (get_dma_rtail_setting(rcd)) {
 555                 mdata->ps_tail = get_rcvhdrtail(rcd);
 556                 if (rcd->ctxt == HFI1_CTRL_CTXT)
 557                         mdata->ps_seq = hfi1_seq_cnt(rcd);
 558                 else
 559                         mdata->ps_seq = 0; /* not used with DMA_RTAIL */
 560         } else {
 561                 mdata->ps_tail = 0; /* used only with DMA_RTAIL*/
 562                 mdata->ps_seq = hfi1_seq_cnt(rcd);
 563         }
 564 }
 565
 566 static inline int ps_done(struct ps_mdata *mdata, u64 rhf,
 567                           struct hfi1_ctxtdata *rcd)
 568 {
 569         if (get_dma_rtail_setting(rcd))
 570                 return mdata->ps_head == mdata->ps_tail;
 571         return mdata->ps_seq != rhf_rcv_seq(rhf);
 572 }
 573
 574 static inline int ps_skip(struct ps_mdata *mdata, u64 rhf,
 575                           struct hfi1_ctxtdata *rcd)
 576 {
 577         /*
 578          * Control context can potentially receive an invalid rhf.
 579          * Drop such packets.
 580          */
 581         if ((rcd->ctxt == HFI1_CTRL_CTXT) && (mdata->ps_head != mdata->ps_tail))
 582                 return mdata->ps_seq != rhf_rcv_seq(rhf);
 583
 584         return 0;
 585 }
 586
 587 static inline void update_ps_mdata(struct ps_mdata *mdata,
 588                                    struct hfi1_ctxtdata *rcd)
 589 {
 590         mdata->ps_head += mdata->rsize;
 591         if (mdata->ps_head >= mdata->maxcnt)
 592                 mdata->ps_head = 0;
 593
 594         /* Control context must do seq counting */
 595         if (!get_dma_rtail_setting(rcd) ||
 596             rcd->ctxt == HFI1_CTRL_CTXT)
 597                 mdata->ps_seq = hfi1_seq_incr_wrap(mdata->ps_seq);
 598 }
 599
 600 /*
 601  * prescan_rxq - search through the receive queue looking for packets
 602  * containing Excplicit Congestion Notifications (FECNs, or BECNs).
 603  * When an ECN is found, process the Congestion Notification, and toggle
 604  * it off.
 605  * This is declared as a macro to allow quick checking of the port to avoid
 606  * the overhead of a function call if not enabled.
 607  */
 608 #define prescan_rxq(rcd, packet) \
 609         do { \
 610                 if (rcd->ppd->cc_prescan) \
 611                         __prescan_rxq(packet); \
 612         } while (0)
 613 static void __prescan_rxq(struct hfi1_packet *packet)
 614 {
 615         struct hfi1_ctxtdata *rcd = packet->rcd;
 616         struct ps_mdata mdata;
 617
 618         init_ps_mdata(&mdata, packet);
 619
 620         while (1) {
 621                 struct hfi1_ibport *ibp = rcd_to_iport(rcd);
 622                 __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +
 623                                          packet->rcd->rhf_offset;
 624                 struct rvt_qp *qp;
 625                 struct ib_header *hdr;
 626                 struct rvt_dev_info *rdi = &rcd->dd->verbs_dev.rdi;
 627                 u64 rhf = rhf_to_cpu(rhf_addr);
 628                 u32 etype = rhf_rcv_type(rhf), qpn, bth1;
 629                 u8 lnh;
 630
 631                 if (ps_done(&mdata, rhf, rcd))
 632                         break;
 633
 634                 if (ps_skip(&mdata, rhf, rcd))
 635                         goto next;
 636
 637                 if (etype != RHF_RCV_TYPE_IB)
 638                         goto next;
 639
 640                 packet->hdr = hfi1_get_msgheader(packet->rcd, rhf_addr);
 641                 hdr = packet->hdr;
 642                 lnh = ib_get_lnh(hdr);
 643
 644                 if (lnh == HFI1_LRH_BTH) {
 645                         packet->ohdr = &hdr->u.oth;
 646                         packet->grh = NULL;
 647                 } else if (lnh == HFI1_LRH_GRH) {
 648                         packet->ohdr = &hdr->u.l.oth;
 649                         packet->grh = &hdr->u.l.grh;
 650                 } else {
 651                         goto next; /* just in case */
 652                 }
 653
 654                 if (!hfi1_may_ecn(packet))
 655                         goto next;
 656
 657                 bth1 = be32_to_cpu(packet->ohdr->bth[1]);
 658                 qpn = bth1 & RVT_QPN_MASK;
 659                 rcu_read_lock();
 660                 qp = rvt_lookup_qpn(rdi, &ibp->rvp, qpn);
 661
 662                 if (!qp) {
 663                         rcu_read_unlock();
 664                         goto next;
 665                 }
 666
 667                 hfi1_process_ecn_slowpath(qp, packet, true);
 668                 rcu_read_unlock();
 669
 670                 /* turn off BECN, FECN */
 671                 bth1 &= ~(IB_FECN_SMASK | IB_BECN_SMASK);
 672                 packet->ohdr->bth[1] = cpu_to_be32(bth1);
 673 next:
 674                 update_ps_mdata(&mdata, rcd);
 675         }
 676 }
 677
 678 static void process_rcv_qp_work(struct hfi1_packet *packet)
 679 {
 680         struct rvt_qp *qp, *nqp;
 681         struct hfi1_ctxtdata *rcd = packet->rcd;
 682
 683         /*
 684          * Iterate over all QPs waiting to respond.
 685          * The list won't change since the IRQ is only run on one CPU.
 686          */
 687         list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) {
 688                 list_del_init(&qp->rspwait);
 689                 if (qp->r_flags & RVT_R_RSP_NAK) {
 690                         qp->r_flags &= ~RVT_R_RSP_NAK;
 691                         packet->qp = qp;
 692                         hfi1_send_rc_ack(packet, 0);
 693                 }
 694                 if (qp->r_flags & RVT_R_RSP_SEND) {
 695                         unsigned long flags;
 696
 697                         qp->r_flags &= ~RVT_R_RSP_SEND;
 698                         spin_lock_irqsave(&qp->s_lock, flags);
 699                         if (ib_rvt_state_ops[qp->state] &
 700                                         RVT_PROCESS_OR_FLUSH_SEND)
 701                                 hfi1_schedule_send(qp);
 702                         spin_unlock_irqrestore(&qp->s_lock, flags);
 703                 }
 704                 rvt_put_qp(qp);
 705         }
 706 }
 707
 708 static noinline int max_packet_exceeded(struct hfi1_packet *packet, int thread)
 709 {
 710         if (thread) {
 711                 if ((packet->numpkt & (MAX_PKT_RECV_THREAD - 1)) == 0)
 712                         /* allow defered processing */
 713                         process_rcv_qp_work(packet);
 714                 cond_resched();
 715                 return RCV_PKT_OK;
 716         } else {
 717                 this_cpu_inc(*packet->rcd->dd->rcv_limit);
 718                 return RCV_PKT_LIMIT;
 719         }
 720 }
 721
 722 static inline int check_max_packet(struct hfi1_packet *packet, int thread)
 723 {
 724         int ret = RCV_PKT_OK;
 725
 726         if (unlikely((packet->numpkt & (MAX_PKT_RECV - 1)) == 0))
 727                 ret = max_packet_exceeded(packet, thread);
 728         return ret;
 729 }
 730
 731 static noinline int skip_rcv_packet(struct hfi1_packet *packet, int thread)
 732 {
 733         int ret;
 734
 735         packet->rcd->dd->ctx0_seq_drop++;
 736         /* Set up for the next packet */
 737         packet->rhqoff += packet->rsize;
 738         if (packet->rhqoff >= packet->maxcnt)
 739                 packet->rhqoff = 0;
 740
 741         packet->numpkt++;
 742         ret = check_max_packet(packet, thread);
 743
 744         packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff +
 745                                      packet->rcd->rhf_offset;
 746         packet->rhf = rhf_to_cpu(packet->rhf_addr);
 747
 748         return ret;
 749 }
 750
 751 static inline int process_rcv_packet(struct hfi1_packet *packet, int thread)
 752 {
 753         int ret;
 754
 755         packet->etype = rhf_rcv_type(packet->rhf);
 756
 757         /* total length */
 758         packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */
 759         /* retrieve eager buffer details */
 760         packet->ebuf = NULL;
 761         if (rhf_use_egr_bfr(packet->rhf)) {
 762                 packet->etail = rhf_egr_index(packet->rhf);
 763                 packet->ebuf = get_egrbuf(packet->rcd, packet->rhf,
 764                                  &packet->updegr);
 765                 /*
 766                  * Prefetch the contents of the eager buffer.  It is
 767                  * OK to send a negative length to prefetch_range().
 768                  * The +2 is the size of the RHF.
 769                  */
 770                 prefetch_range(packet->ebuf,
 771                                packet->tlen - ((get_hdrqentsize(packet->rcd) -
 772                                                (rhf_hdrq_offset(packet->rhf)
 773                                                 + 2)) * 4));
 774         }
 775
 776         /*
 777          * Call a type specific handler for the packet. We
 778          * should be able to trust that etype won't be beyond
 779          * the range of valid indexes. If so something is really
 780          * wrong and we can probably just let things come
 781          * crashing down. There is no need to eat another
 782          * comparison in this performance critical code.
 783          */
 784         packet->rcd->rhf_rcv_function_map[packet->etype](packet);
 785         packet->numpkt++;
 786
 787         /* Set up for the next packet */
 788         packet->rhqoff += packet->rsize;
 789         if (packet->rhqoff >= packet->maxcnt)
 790                 packet->rhqoff = 0;
 791
 792         ret = check_max_packet(packet, thread);
 793
 794         packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff +
 795                                       packet->rcd->rhf_offset;
 796         packet->rhf = rhf_to_cpu(packet->rhf_addr);
 797
 798         return ret;
 799 }
 800
 801 static inline void process_rcv_update(int last, struct hfi1_packet *packet)
 802 {
 803         /*
 804          * Update head regs etc., every 16 packets, if not last pkt,
 805          * to help prevent rcvhdrq overflows, when many packets
 806          * are processed and queue is nearly full.
 807          * Don't request an interrupt for intermediate updates.
 808          */
 809         if (!last && !(packet->numpkt & 0xf)) {
 810                 update_usrhead(packet->rcd, packet->rhqoff, packet->updegr,
 811                                packet->etail, 0, 0);
 812                 packet->updegr = 0;
 813         }
 814         packet->grh = NULL;
 815 }
 816
 817 static inline void finish_packet(struct hfi1_packet *packet)
 818 {
 819         /*
 820          * Nothing we need to free for the packet.
 821          *
 822          * The only thing we need to do is a final update and call for an
 823          * interrupt
 824          */
 825         update_usrhead(packet->rcd, hfi1_rcd_head(packet->rcd), packet->updegr,
 826                        packet->etail, rcv_intr_dynamic, packet->numpkt);
 827 }
 828
 829 /*
 830  * Handle receive interrupts when using the no dma rtail option.
 831  */
 832 int handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd, int thread)
 833 {
 834         int last = RCV_PKT_OK;
 835         struct hfi1_packet packet;
 836
 837         init_packet(rcd, &packet);
 838         if (last_rcv_seq(rcd, rhf_rcv_seq(packet.rhf))) {
 839                 last = RCV_PKT_DONE;
 840                 goto bail;
 841         }
 842
 843         prescan_rxq(rcd, &packet);
 844
 845         while (last == RCV_PKT_OK) {
 846                 last = process_rcv_packet(&packet, thread);
 847                 if (hfi1_seq_incr(rcd, rhf_rcv_seq(packet.rhf)))
 848                         last = RCV_PKT_DONE;
 849                 process_rcv_update(last, &packet);
 850         }
 851         process_rcv_qp_work(&packet);
 852         hfi1_set_rcd_head(rcd, packet.rhqoff);
 853 bail:
 854         finish_packet(&packet);
 855         return last;
 856 }
 857
 858 int handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd, int thread)
 859 {
 860         u32 hdrqtail;
 861         int last = RCV_PKT_OK;
 862         struct hfi1_packet packet;
 863
 864         init_packet(rcd, &packet);
 865         hdrqtail = get_rcvhdrtail(rcd);
 866         if (packet.rhqoff == hdrqtail) {
 867                 last = RCV_PKT_DONE;
 868                 goto bail;
 869         }
 870         smp_rmb();  /* prevent speculative reads of dma'ed hdrq */
 871
 872         prescan_rxq(rcd, &packet);
 873
 874         while (last == RCV_PKT_OK) {
 875                 last = process_rcv_packet(&packet, thread);
 876                 if (packet.rhqoff == hdrqtail)
 877                         last = RCV_PKT_DONE;
 878                 process_rcv_update(last, &packet);
 879         }
 880         process_rcv_qp_work(&packet);
 881         hfi1_set_rcd_head(rcd, packet.rhqoff);
 882 bail:
 883         finish_packet(&packet);
 884         return last;
 885 }
 886
 887 static void set_all_fastpath(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd)
 888 {
 889         u16 i;
 890
 891         /*
 892          * For dynamically allocated kernel contexts (like vnic) switch
 893          * interrupt handler only for that context. Otherwise, switch
 894          * interrupt handler for all statically allocated kernel contexts.
 895          */
 896         if (rcd->ctxt >= dd->first_dyn_alloc_ctxt && !rcd->is_vnic) {
 897                 hfi1_rcd_get(rcd);
 898                 hfi1_set_fast(rcd);
 899                 hfi1_rcd_put(rcd);
 900                 return;
 901         }
 902
 903         for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) {
 904                 rcd = hfi1_rcd_get_by_index(dd, i);
 905                 if (rcd && (i < dd->first_dyn_alloc_ctxt || rcd->is_vnic))
 906                         hfi1_set_fast(rcd);
 907                 hfi1_rcd_put(rcd);
 908         }
 909 }
 910
 911 void set_all_slowpath(struct hfi1_devdata *dd)
 912 {
 913         struct hfi1_ctxtdata *rcd;
 914         u16 i;
 915
 916         /* HFI1_CTRL_CTXT must always use the slow path interrupt handler */
 917         for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) {
 918                 rcd = hfi1_rcd_get_by_index(dd, i);
 919                 if (!rcd)
 920                         continue;
 921                 if (i < dd->first_dyn_alloc_ctxt || rcd->is_vnic)
 922                         rcd->do_interrupt = rcd->slow_handler;
 923
 924                 hfi1_rcd_put(rcd);
 925         }
 926 }
 927
 928 static bool __set_armed_to_active(struct hfi1_packet *packet)
 929 {
 930         u8 etype = rhf_rcv_type(packet->rhf);
 931         u8 sc = SC15_PACKET;
 932
 933         if (etype == RHF_RCV_TYPE_IB) {
 934                 struct ib_header *hdr = hfi1_get_msgheader(packet->rcd,
 935                                                            packet->rhf_addr);
 936                 sc = hfi1_9B_get_sc5(hdr, packet->rhf);
 937         } else if (etype == RHF_RCV_TYPE_BYPASS) {
 938                 struct hfi1_16b_header *hdr = hfi1_get_16B_header(
 939                                                 packet->rcd,
 940                                                 packet->rhf_addr);
 941                 sc = hfi1_16B_get_sc(hdr);
 942         }
 943         if (sc != SC15_PACKET) {
 944                 int hwstate = driver_lstate(packet->rcd->ppd);
 945                 struct work_struct *lsaw =
 946                                 &packet->rcd->ppd->linkstate_active_work;
 947
 948                 if (hwstate != IB_PORT_ACTIVE) {
 949                         dd_dev_info(packet->rcd->dd,
 950                                     "Unexpected link state %s\n",
 951                                     opa_lstate_name(hwstate));
 952                         return false;
 953                 }
 954
 955                 queue_work(packet->rcd->ppd->link_wq, lsaw);
 956                 return true;
 957         }
 958         return false;
 959 }
 960
 961 /**
 962  * armed to active - the fast path for armed to active
 963  * @packet: the packet structure
 964  *
 965  * Return true if packet processing needs to bail.
 966  */
 967 static bool set_armed_to_active(struct hfi1_packet *packet)
 968 {
 969         if (likely(packet->rcd->ppd->host_link_state != HLS_UP_ARMED))
 970                 return false;
 971         return __set_armed_to_active(packet);
 972 }
 973
 974 /*
 975  * handle_receive_interrupt - receive a packet
 976  * @rcd: the context
 977  *
 978  * Called from interrupt handler for errors or receive interrupt.
 979  * This is the slow path interrupt handler.
 980  */
 981 int handle_receive_interrupt(struct hfi1_ctxtdata *rcd, int thread)
 982 {
 983         struct hfi1_devdata *dd = rcd->dd;
 984         u32 hdrqtail;
 985         int needset, last = RCV_PKT_OK;
 986         struct hfi1_packet packet;
 987         int skip_pkt = 0;
 988
 989         /* Control context will always use the slow path interrupt handler */
 990         needset = (rcd->ctxt == HFI1_CTRL_CTXT) ? 0 : 1;
 991
 992         init_packet(rcd, &packet);
 993
 994         if (!get_dma_rtail_setting(rcd)) {
 995                 if (last_rcv_seq(rcd, rhf_rcv_seq(packet.rhf))) {
 996                         last = RCV_PKT_DONE;
 997                         goto bail;
 998                 }
 999                 hdrqtail = 0;
1000         } else {
1001                 hdrqtail = get_rcvhdrtail(rcd);
1002                 if (packet.rhqoff == hdrqtail) {
1003                         last = RCV_PKT_DONE;
1004                         goto bail;
1005                 }
1006                 smp_rmb();  /* prevent speculative reads of dma'ed hdrq */
1007
1008                 /*
1009                  * Control context can potentially receive an invalid
1010                  * rhf. Drop such packets.
1011                  */
1012                 if (rcd->ctxt == HFI1_CTRL_CTXT)
1013                         if (last_rcv_seq(rcd, rhf_rcv_seq(packet.rhf)))
1014                                 skip_pkt = 1;
1015         }
1016
1017         prescan_rxq(rcd, &packet);
1018
1019         while (last == RCV_PKT_OK) {
1020                 if (hfi1_need_drop(dd)) {
1021                         /* On to the next packet */
1022                         packet.rhqoff += packet.rsize;
1023                         packet.rhf_addr = (__le32 *)rcd->rcvhdrq +
1024                                           packet.rhqoff +
1025                                           rcd->rhf_offset;
1026                         packet.rhf = rhf_to_cpu(packet.rhf_addr);
1027
1028                 } else if (skip_pkt) {
1029                         last = skip_rcv_packet(&packet, thread);
1030                         skip_pkt = 0;
1031                 } else {
1032                         if (set_armed_to_active(&packet))
1033                                 goto bail;
1034                         last = process_rcv_packet(&packet, thread);
1035                 }
1036
1037                 if (!get_dma_rtail_setting(rcd)) {
1038                         if (hfi1_seq_incr(rcd, rhf_rcv_seq(packet.rhf)))
1039                                 last = RCV_PKT_DONE;
1040                 } else {
1041                         if (packet.rhqoff == hdrqtail)
1042                                 last = RCV_PKT_DONE;
1043                         /*
1044                          * Control context can potentially receive an invalid
1045                          * rhf. Drop such packets.
1046                          */
1047                         if (rcd->ctxt == HFI1_CTRL_CTXT) {
1048                                 bool lseq;
1049
1050                                 lseq = hfi1_seq_incr(rcd,
1051                                                      rhf_rcv_seq(packet.rhf));
1052                                 if (!last && lseq)
1053                                         skip_pkt = 1;
1054                         }
1055                 }
1056
1057                 if (needset) {
1058                         needset = false;
1059                         set_all_fastpath(dd, rcd);
1060                 }
1061                 process_rcv_update(last, &packet);
1062         }
1063
1064         process_rcv_qp_work(&packet);
1065         hfi1_set_rcd_head(rcd, packet.rhqoff);
1066
1067 bail:
1068         /*
1069          * Always write head at end, and setup rcv interrupt, even
1070          * if no packets were processed.
1071          */
1072         finish_packet(&packet);
1073         return last;
1074 }
1075
1076 /*
1077  * We may discover in the interrupt that the hardware link state has
1078  * changed from ARMED to ACTIVE (due to the arrival of a non-SC15 packet),
1079  * and we need to update the driver's notion of the link state.  We cannot
1080  * run set_link_state from interrupt context, so we queue this function on
1081  * a workqueue.
1082  *
1083  * We delay the regular interrupt processing until after the state changes
1084  * so that the link will be in the correct state by the time any application
1085  * we wake up attempts to send a reply to any message it received.
1086  * (Subsequent receive interrupts may possibly force the wakeup before we
1087  * update the link state.)
1088  *
1089  * The rcd is freed in hfi1_free_ctxtdata after hfi1_postinit_cleanup invokes
1090  * dd->f_cleanup(dd) to disable the interrupt handler and flush workqueues,
1091  * so we're safe from use-after-free of the rcd.
1092  */
1093 void receive_interrupt_work(struct work_struct *work)
1094 {
1095         struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
1096                                                   linkstate_active_work);
1097         struct hfi1_devdata *dd = ppd->dd;
1098         struct hfi1_ctxtdata *rcd;
1099         u16 i;
1100
1101         /* Received non-SC15 packet implies neighbor_normal */
1102         ppd->neighbor_normal = 1;
1103         set_link_state(ppd, HLS_UP_ACTIVE);
1104
1105         /*
1106          * Interrupt all statically allocated kernel contexts that could
1107          * have had an interrupt during auto activation.
1108          */
1109         for (i = HFI1_CTRL_CTXT; i < dd->first_dyn_alloc_ctxt; i++) {
1110                 rcd = hfi1_rcd_get_by_index(dd, i);
1111                 if (rcd)
1112                         force_recv_intr(rcd);
1113                 hfi1_rcd_put(rcd);
1114         }
1115 }
1116
1117 /*
1118  * Convert a given MTU size to the on-wire MAD packet enumeration.
1119  * Return -1 if the size is invalid.
1120  */
1121 int mtu_to_enum(u32 mtu, int default_if_bad)
1122 {
1123         switch (mtu) {
1124         case     0: return OPA_MTU_0;
1125         case   256: return OPA_MTU_256;
1126         case   512: return OPA_MTU_512;
1127         case  1024: return OPA_MTU_1024;
1128         case  2048: return OPA_MTU_2048;
1129         case  4096: return OPA_MTU_4096;
1130         case  8192: return OPA_MTU_8192;
1131         case 10240: return OPA_MTU_10240;
1132         }
1133         return default_if_bad;
1134 }
1135
1136 u16 enum_to_mtu(int mtu)
1137 {
1138         switch (mtu) {
1139         case OPA_MTU_0:     return 0;
1140         case OPA_MTU_256:   return 256;
1141         case OPA_MTU_512:   return 512;
1142         case OPA_MTU_1024:  return 1024;
1143         case OPA_MTU_2048:  return 2048;
1144         case OPA_MTU_4096:  return 4096;
1145         case OPA_MTU_8192:  return 8192;
1146         case OPA_MTU_10240: return 10240;
1147         default: return 0xffff;
1148         }
1149 }
1150
1151 /*
1152  * set_mtu - set the MTU
1153  * @ppd: the per port data
1154  *
1155  * We can handle "any" incoming size, the issue here is whether we
1156  * need to restrict our outgoing size.  We do not deal with what happens
1157  * to programs that are already running when the size changes.
1158  */
1159 int set_mtu(struct hfi1_pportdata *ppd)
1160 {
1161         struct hfi1_devdata *dd = ppd->dd;
1162         int i, drain, ret = 0, is_up = 0;
1163
1164         ppd->ibmtu = 0;
1165         for (i = 0; i < ppd->vls_supported; i++)
1166                 if (ppd->ibmtu < dd->vld[i].mtu)
1167                         ppd->ibmtu = dd->vld[i].mtu;
1168         ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd);
1169
1170         mutex_lock(&ppd->hls_lock);
1171         if (ppd->host_link_state == HLS_UP_INIT ||
1172             ppd->host_link_state == HLS_UP_ARMED ||
1173             ppd->host_link_state == HLS_UP_ACTIVE)
1174                 is_up = 1;
1175
1176         drain = !is_ax(dd) && is_up;
1177
1178         if (drain)
1179                 /*
1180                  * MTU is specified per-VL. To ensure that no packet gets
1181                  * stuck (due, e.g., to the MTU for the packet's VL being
1182                  * reduced), empty the per-VL FIFOs before adjusting MTU.
1183                  */
1184                 ret = stop_drain_data_vls(dd);
1185
1186         if (ret) {
1187                 dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n",
1188                            __func__);
1189                 goto err;
1190         }
1191
1192         hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0);
1193
1194         if (drain)
1195                 open_fill_data_vls(dd); /* reopen all VLs */
1196
1197 err:
1198         mutex_unlock(&ppd->hls_lock);
1199
1200         return ret;
1201 }
1202
1203 int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc)
1204 {
1205         struct hfi1_devdata *dd = ppd->dd;
1206
1207         ppd->lid = lid;
1208         ppd->lmc = lmc;
1209         hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0);
1210
1211         dd_dev_info(dd, "port %u: got a lid: 0x%x\n", ppd->port, lid);
1212
1213         return 0;
1214 }
1215
1216 void shutdown_led_override(struct hfi1_pportdata *ppd)
1217 {
1218         struct hfi1_devdata *dd = ppd->dd;
1219
1220         /*
1221          * This pairs with the memory barrier in hfi1_start_led_override to
1222          * ensure that we read the correct state of LED beaconing represented
1223          * by led_override_timer_active
1224          */
1225         smp_rmb();
1226         if (atomic_read(&ppd->led_override_timer_active)) {
1227                 del_timer_sync(&ppd->led_override_timer);
1228                 atomic_set(&ppd->led_override_timer_active, 0);
1229                 /* Ensure the atomic_set is visible to all CPUs */
1230                 smp_wmb();
1231         }
1232
1233         /* Hand control of the LED to the DC for normal operation */
1234         write_csr(dd, DCC_CFG_LED_CNTRL, 0);
1235 }
1236
1237 static void run_led_override(struct timer_list *t)
1238 {
1239         struct hfi1_pportdata *ppd = from_timer(ppd, t, led_override_timer);
1240         struct hfi1_devdata *dd = ppd->dd;
1241         unsigned long timeout;
1242         int phase_idx;
1243
1244         if (!(dd->flags & HFI1_INITTED))
1245                 return;
1246
1247         phase_idx = ppd->led_override_phase & 1;
1248
1249         setextled(dd, phase_idx);
1250
1251         timeout = ppd->led_override_vals[phase_idx];
1252
1253         /* Set up for next phase */
1254         ppd->led_override_phase = !ppd->led_override_phase;
1255
1256         mod_timer(&ppd->led_override_timer, jiffies + timeout);
1257 }
1258
1259 /*
1260  * To have the LED blink in a particular pattern, provide timeon and timeoff
1261  * in milliseconds.
1262  * To turn off custom blinking and return to normal operation, use
1263  * shutdown_led_override()
1264  */
1265 void hfi1_start_led_override(struct hfi1_pportdata *ppd, unsigned int timeon,
1266                              unsigned int timeoff)
1267 {
1268         if (!(ppd->dd->flags & HFI1_INITTED))
1269                 return;
1270
1271         /* Convert to jiffies for direct use in timer */
1272         ppd->led_override_vals[0] = msecs_to_jiffies(timeoff);
1273         ppd->led_override_vals[1] = msecs_to_jiffies(timeon);
1274
1275         /* Arbitrarily start from LED on phase */
1276         ppd->led_override_phase = 1;
1277
1278         /*
1279          * If the timer has not already been started, do so. Use a "quick"
1280          * timeout so the handler will be called soon to look at our request.
1281          */
1282         if (!timer_pending(&ppd->led_override_timer)) {
1283                 timer_setup(&ppd->led_override_timer, run_led_override, 0);
1284                 ppd->led_override_timer.expires = jiffies + 1;
1285                 add_timer(&ppd->led_override_timer);
1286                 atomic_set(&ppd->led_override_timer_active, 1);
1287                 /* Ensure the atomic_set is visible to all CPUs */
1288                 smp_wmb();
1289         }
1290 }
1291
1292 /**
1293  * hfi1_reset_device - reset the chip if possible
1294  * @unit: the device to reset
1295  *
1296  * Whether or not reset is successful, we attempt to re-initialize the chip
1297  * (that is, much like a driver unload/reload).  We clear the INITTED flag
1298  * so that the various entry points will fail until we reinitialize.  For
1299  * now, we only allow this if no user contexts are open that use chip resources
1300  */
1301 int hfi1_reset_device(int unit)
1302 {
1303         int ret;
1304         struct hfi1_devdata *dd = hfi1_lookup(unit);
1305         struct hfi1_pportdata *ppd;
1306         int pidx;
1307
1308         if (!dd) {
1309                 ret = -ENODEV;
1310                 goto bail;
1311         }
1312
1313         dd_dev_info(dd, "Reset on unit %u requested\n", unit);
1314
1315         if (!dd->kregbase1 || !(dd->flags & HFI1_PRESENT)) {
1316                 dd_dev_info(dd,
1317                             "Invalid unit number %u or not initialized or not present\n",
1318                             unit);
1319                 ret = -ENXIO;
1320                 goto bail;
1321         }
1322
1323         /* If there are any user/vnic contexts, we cannot reset */
1324         mutex_lock(&hfi1_mutex);
1325         if (dd->rcd)
1326                 if (hfi1_stats.sps_ctxts) {
1327                         mutex_unlock(&hfi1_mutex);
1328                         ret = -EBUSY;
1329                         goto bail;
1330                 }
1331         mutex_unlock(&hfi1_mutex);
1332
1333         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
1334                 ppd = dd->pport + pidx;
1335
1336                 shutdown_led_override(ppd);
1337         }
1338         if (dd->flags & HFI1_HAS_SEND_DMA)
1339                 sdma_exit(dd);
1340
1341         hfi1_reset_cpu_counters(dd);
1342
1343         ret = hfi1_init(dd, 1);
1344
1345         if (ret)
1346                 dd_dev_err(dd,
1347                            "Reinitialize unit %u after reset failed with %d\n",
1348                            unit, ret);
1349         else
1350                 dd_dev_info(dd, "Reinitialized unit %u after resetting\n",
1351                             unit);
1352
1353 bail:
1354         return ret;
1355 }
1356
1357 static inline void hfi1_setup_ib_header(struct hfi1_packet *packet)
1358 {
1359         packet->hdr = (struct hfi1_ib_message_header *)
1360                         hfi1_get_msgheader(packet->rcd,
1361                                            packet->rhf_addr);
1362         packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
1363 }
1364
1365 static int hfi1_bypass_ingress_pkt_check(struct hfi1_packet *packet)
1366 {
1367         struct hfi1_pportdata *ppd = packet->rcd->ppd;
1368
1369         /* slid and dlid cannot be 0 */
1370         if ((!packet->slid) || (!packet->dlid))
1371                 return -EINVAL;
1372
1373         /* Compare port lid with incoming packet dlid */
1374         if ((!(hfi1_is_16B_mcast(packet->dlid))) &&
1375             (packet->dlid !=
1376                 opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B))) {
1377                 if ((packet->dlid & ~((1 << ppd->lmc) - 1)) != ppd->lid)
1378                         return -EINVAL;
1379         }
1380
1381         /* No multicast packets with SC15 */
1382         if ((hfi1_is_16B_mcast(packet->dlid)) && (packet->sc == 0xF))
1383                 return -EINVAL;
1384
1385         /* Packets with permissive DLID always on SC15 */
1386         if ((packet->dlid == opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE),
1387                                          16B)) &&
1388             (packet->sc != 0xF))
1389                 return -EINVAL;
1390
1391         return 0;
1392 }
1393
1394 static int hfi1_setup_9B_packet(struct hfi1_packet *packet)
1395 {
1396         struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
1397         struct ib_header *hdr;
1398         u8 lnh;
1399
1400         hfi1_setup_ib_header(packet);
1401         hdr = packet->hdr;
1402
1403         lnh = ib_get_lnh(hdr);
1404         if (lnh == HFI1_LRH_BTH) {
1405                 packet->ohdr = &hdr->u.oth;
1406                 packet->grh = NULL;
1407         } else if (lnh == HFI1_LRH_GRH) {
1408                 u32 vtf;
1409
1410                 packet->ohdr = &hdr->u.l.oth;
1411                 packet->grh = &hdr->u.l.grh;
1412                 if (packet->grh->next_hdr != IB_GRH_NEXT_HDR)
1413                         goto drop;
1414                 vtf = be32_to_cpu(packet->grh->version_tclass_flow);
1415                 if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
1416                         goto drop;
1417         } else {
1418                 goto drop;
1419         }
1420
1421         /* Query commonly used fields from packet header */
1422         packet->payload = packet->ebuf;
1423         packet->opcode = ib_bth_get_opcode(packet->ohdr);
1424         packet->slid = ib_get_slid(hdr);
1425         packet->dlid = ib_get_dlid(hdr);
1426         if (unlikely((packet->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
1427                      (packet->dlid != be16_to_cpu(IB_LID_PERMISSIVE))))
1428                 packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
1429                                 be16_to_cpu(IB_MULTICAST_LID_BASE);
1430         packet->sl = ib_get_sl(hdr);
1431         packet->sc = hfi1_9B_get_sc5(hdr, packet->rhf);
1432         packet->pad = ib_bth_get_pad(packet->ohdr);
1433         packet->extra_byte = 0;
1434         packet->pkey = ib_bth_get_pkey(packet->ohdr);
1435         packet->migrated = ib_bth_is_migration(packet->ohdr);
1436
1437         return 0;
1438 drop:
1439         ibp->rvp.n_pkt_drops++;
1440         return -EINVAL;
1441 }
1442
1443 static int hfi1_setup_bypass_packet(struct hfi1_packet *packet)
1444 {
1445         /*
1446          * Bypass packets have a different header/payload split
1447          * compared to an IB packet.
1448          * Current split is set such that 16 bytes of the actual
1449          * header is in the header buffer and the remining is in
1450          * the eager buffer. We chose 16 since hfi1 driver only
1451          * supports 16B bypass packets and we will be able to
1452          * receive the entire LRH with such a split.
1453          */
1454
1455         struct hfi1_ctxtdata *rcd = packet->rcd;
1456         struct hfi1_pportdata *ppd = rcd->ppd;
1457         struct hfi1_ibport *ibp = &ppd->ibport_data;
1458         u8 l4;
1459
1460         packet->hdr = (struct hfi1_16b_header *)
1461                         hfi1_get_16B_header(packet->rcd,
1462                                             packet->rhf_addr);
1463         l4 = hfi1_16B_get_l4(packet->hdr);
1464         if (l4 == OPA_16B_L4_IB_LOCAL) {
1465                 packet->ohdr = packet->ebuf;
1466                 packet->grh = NULL;
1467                 packet->opcode = ib_bth_get_opcode(packet->ohdr);
1468                 packet->pad = hfi1_16B_bth_get_pad(packet->ohdr);
1469                 /* hdr_len_by_opcode already has an IB LRH factored in */
1470                 packet->hlen = hdr_len_by_opcode[packet->opcode] +
1471                         (LRH_16B_BYTES - LRH_9B_BYTES);
1472                 packet->migrated = opa_bth_is_migration(packet->ohdr);
1473         } else if (l4 == OPA_16B_L4_IB_GLOBAL) {
1474                 u32 vtf;
1475                 u8 grh_len = sizeof(struct ib_grh);
1476
1477                 packet->ohdr = packet->ebuf + grh_len;
1478                 packet->grh = packet->ebuf;
1479                 packet->opcode = ib_bth_get_opcode(packet->ohdr);
1480                 packet->pad = hfi1_16B_bth_get_pad(packet->ohdr);
1481                 /* hdr_len_by_opcode already has an IB LRH factored in */
1482                 packet->hlen = hdr_len_by_opcode[packet->opcode] +
1483                         (LRH_16B_BYTES - LRH_9B_BYTES) + grh_len;
1484                 packet->migrated = opa_bth_is_migration(packet->ohdr);
1485
1486                 if (packet->grh->next_hdr != IB_GRH_NEXT_HDR)
1487                         goto drop;
1488                 vtf = be32_to_cpu(packet->grh->version_tclass_flow);
1489                 if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
1490                         goto drop;
1491         } else if (l4 == OPA_16B_L4_FM) {
1492                 packet->mgmt = packet->ebuf;
1493                 packet->ohdr = NULL;
1494                 packet->grh = NULL;
1495                 packet->opcode = IB_OPCODE_UD_SEND_ONLY;
1496                 packet->pad = OPA_16B_L4_FM_PAD;
1497                 packet->hlen = OPA_16B_L4_FM_HLEN;
1498                 packet->migrated = false;
1499         } else {
1500                 goto drop;
1501         }
1502
1503         /* Query commonly used fields from packet header */
1504         packet->payload = packet->ebuf + packet->hlen - LRH_16B_BYTES;
1505         packet->slid = hfi1_16B_get_slid(packet->hdr);
1506         packet->dlid = hfi1_16B_get_dlid(packet->hdr);
1507         if (unlikely(hfi1_is_16B_mcast(packet->dlid)))
1508                 packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
1509                                 opa_get_lid(opa_get_mcast_base(OPA_MCAST_NR),
1510                                             16B);
1511         packet->sc = hfi1_16B_get_sc(packet->hdr);
1512         packet->sl = ibp->sc_to_sl[packet->sc];
1513         packet->extra_byte = SIZE_OF_LT;
1514         packet->pkey = hfi1_16B_get_pkey(packet->hdr);
1515
1516         if (hfi1_bypass_ingress_pkt_check(packet))
1517                 goto drop;
1518
1519         return 0;
1520 drop:
1521         hfi1_cdbg(PKT, "%s: packet dropped\n", __func__);
1522         ibp->rvp.n_pkt_drops++;
1523         return -EINVAL;
1524 }
1525
1526 static void show_eflags_errs(struct hfi1_packet *packet)
1527 {
1528         struct hfi1_ctxtdata *rcd = packet->rcd;
1529         u32 rte = rhf_rcv_type_err(packet->rhf);
1530
1531         dd_dev_err(rcd->dd,
1532                    "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s] rte 0x%x\n",
1533                    rcd->ctxt, packet->rhf,
1534                    packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "",
1535                    packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "",
1536                    packet->rhf & RHF_DC_ERR ? "dc " : "",
1537                    packet->rhf & RHF_TID_ERR ? "tid " : "",
1538                    packet->rhf & RHF_LEN_ERR ? "len " : "",
1539                    packet->rhf & RHF_ECC_ERR ? "ecc " : "",
1540                    packet->rhf & RHF_ICRC_ERR ? "icrc " : "",
1541                    rte);
1542 }
1543
1544 void handle_eflags(struct hfi1_packet *packet)
1545 {
1546         struct hfi1_ctxtdata *rcd = packet->rcd;
1547
1548         rcv_hdrerr(rcd, rcd->ppd, packet);
1549         if (rhf_err_flags(packet->rhf))
1550                 show_eflags_errs(packet);
1551 }
1552
1553 /*
1554  * The following functions are called by the interrupt handler. They are type
1555  * specific handlers for each packet type.
1556  */
1557 static void process_receive_ib(struct hfi1_packet *packet)
1558 {
1559         if (hfi1_setup_9B_packet(packet))
1560                 return;
1561
1562         if (unlikely(hfi1_dbg_should_fault_rx(packet)))
1563                 return;
1564
1565         trace_hfi1_rcvhdr(packet);
1566
1567         if (unlikely(rhf_err_flags(packet->rhf))) {
1568                 handle_eflags(packet);
1569                 return;
1570         }
1571
1572         hfi1_ib_rcv(packet);
1573 }
1574
1575 static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet)
1576 {
1577         /* Packet received in VNIC context via RSM */
1578         if (packet->rcd->is_vnic)
1579                 return true;
1580
1581         if ((hfi1_16B_get_l2(packet->ebuf) == OPA_16B_L2_TYPE) &&
1582             (hfi1_16B_get_l4(packet->ebuf) == OPA_16B_L4_ETHR))
1583                 return true;
1584
1585         return false;
1586 }
1587
1588 static void process_receive_bypass(struct hfi1_packet *packet)
1589 {
1590         struct hfi1_devdata *dd = packet->rcd->dd;
1591
1592         if (hfi1_is_vnic_packet(packet)) {
1593                 hfi1_vnic_bypass_rcv(packet);
1594                 return;
1595         }
1596
1597         if (hfi1_setup_bypass_packet(packet))
1598                 return;
1599
1600         trace_hfi1_rcvhdr(packet);
1601
1602         if (unlikely(rhf_err_flags(packet->rhf))) {
1603                 handle_eflags(packet);
1604                 return;
1605         }
1606
1607         if (hfi1_16B_get_l2(packet->hdr) == 0x2) {
1608                 hfi1_16B_rcv(packet);
1609         } else {
1610                 dd_dev_err(dd,
1611                            "Bypass packets other than 16B are not supported in normal operation. Dropping\n");
1612                 incr_cntr64(&dd->sw_rcv_bypass_packet_errors);
1613                 if (!(dd->err_info_rcvport.status_and_code &
1614                       OPA_EI_STATUS_SMASK)) {
1615                         u64 *flits = packet->ebuf;
1616
1617                         if (flits && !(packet->rhf & RHF_LEN_ERR)) {
1618                                 dd->err_info_rcvport.packet_flit1 = flits[0];
1619                                 dd->err_info_rcvport.packet_flit2 =
1620                                         packet->tlen > sizeof(flits[0]) ?
1621                                         flits[1] : 0;
1622                         }
1623                         dd->err_info_rcvport.status_and_code |=
1624                                 (OPA_EI_STATUS_SMASK | BAD_L2_ERR);
1625                 }
1626         }
1627 }
1628
1629 static void process_receive_error(struct hfi1_packet *packet)
1630 {
1631         /* KHdrHCRCErr -- KDETH packet with a bad HCRC */
1632         if (unlikely(
1633                  hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) &&
1634                  (rhf_rcv_type_err(packet->rhf) == RHF_RCV_TYPE_ERROR ||
1635                   packet->rhf & RHF_DC_ERR)))
1636                 return;
1637
1638         hfi1_setup_ib_header(packet);
1639         handle_eflags(packet);
1640
1641         if (unlikely(rhf_err_flags(packet->rhf)))
1642                 dd_dev_err(packet->rcd->dd,
1643                            "Unhandled error packet received. Dropping.\n");
1644 }
1645
1646 static void kdeth_process_expected(struct hfi1_packet *packet)
1647 {
1648         hfi1_setup_9B_packet(packet);
1649         if (unlikely(hfi1_dbg_should_fault_rx(packet)))
1650                 return;
1651
1652         if (unlikely(rhf_err_flags(packet->rhf))) {
1653                 struct hfi1_ctxtdata *rcd = packet->rcd;
1654
1655                 if (hfi1_handle_kdeth_eflags(rcd, rcd->ppd, packet))
1656                         return;
1657         }
1658
1659         hfi1_kdeth_expected_rcv(packet);
1660 }
1661
1662 static void kdeth_process_eager(struct hfi1_packet *packet)
1663 {
1664         hfi1_setup_9B_packet(packet);
1665         if (unlikely(hfi1_dbg_should_fault_rx(packet)))
1666                 return;
1667
1668         trace_hfi1_rcvhdr(packet);
1669         if (unlikely(rhf_err_flags(packet->rhf))) {
1670                 struct hfi1_ctxtdata *rcd = packet->rcd;
1671
1672                 show_eflags_errs(packet);
1673                 if (hfi1_handle_kdeth_eflags(rcd, rcd->ppd, packet))
1674                         return;
1675         }
1676
1677         hfi1_kdeth_eager_rcv(packet);
1678 }
1679
1680 static void process_receive_invalid(struct hfi1_packet *packet)
1681 {
1682         dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n",
1683                    rhf_rcv_type(packet->rhf));
1684 }
1685
1686 #define HFI1_RCVHDR_DUMP_MAX    5
1687
1688 void seqfile_dump_rcd(struct seq_file *s, struct hfi1_ctxtdata *rcd)
1689 {
1690         struct hfi1_packet packet;
1691         struct ps_mdata mdata;
1692         int i;
1693
1694         seq_printf(s, "Rcd %u: RcvHdr cnt %u entsize %u %s ctrl 0x%08llx status 0x%08llx, head %llu tail %llu  sw head %u\n",
1695                    rcd->ctxt, get_hdrq_cnt(rcd), get_hdrqentsize(rcd),
1696                    get_dma_rtail_setting(rcd) ?
1697                    "dma_rtail" : "nodma_rtail",
1698                    read_kctxt_csr(rcd->dd, rcd->ctxt, RCV_CTXT_CTRL),
1699                    read_kctxt_csr(rcd->dd, rcd->ctxt, RCV_CTXT_STATUS),
1700                    read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD) &
1701                    RCV_HDR_HEAD_HEAD_MASK,
1702                    read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL),
1703                    rcd->head);
1704
1705         init_packet(rcd, &packet);
1706         init_ps_mdata(&mdata, &packet);
1707
1708         for (i = 0; i < HFI1_RCVHDR_DUMP_MAX; i++) {
1709                 __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +
1710                                          rcd->rhf_offset;
1711                 struct ib_header *hdr;
1712                 u64 rhf = rhf_to_cpu(rhf_addr);
1713                 u32 etype = rhf_rcv_type(rhf), qpn;
1714                 u8 opcode;
1715                 u32 psn;
1716                 u8 lnh;
1717
1718                 if (ps_done(&mdata, rhf, rcd))
1719                         break;
1720
1721                 if (ps_skip(&mdata, rhf, rcd))
1722                         goto next;
1723
1724                 if (etype > RHF_RCV_TYPE_IB)
1725                         goto next;
1726
1727                 packet.hdr = hfi1_get_msgheader(rcd, rhf_addr);
1728                 hdr = packet.hdr;
1729
1730                 lnh = be16_to_cpu(hdr->lrh[0]) & 3;
1731
1732                 if (lnh == HFI1_LRH_BTH)
1733                         packet.ohdr = &hdr->u.oth;
1734                 else if (lnh == HFI1_LRH_GRH)
1735                         packet.ohdr = &hdr->u.l.oth;
1736                 else
1737                         goto next; /* just in case */
1738
1739                 opcode = (be32_to_cpu(packet.ohdr->bth[0]) >> 24);
1740                 qpn = be32_to_cpu(packet.ohdr->bth[1]) & RVT_QPN_MASK;
1741                 psn = mask_psn(be32_to_cpu(packet.ohdr->bth[2]));
1742
1743                 seq_printf(s, "\tEnt %u: opcode 0x%x, qpn 0x%x, psn 0x%x\n",
1744                            mdata.ps_head, opcode, qpn, psn);
1745 next:
1746                 update_ps_mdata(&mdata, rcd);
1747         }
1748 }
1749
1750 const rhf_rcv_function_ptr normal_rhf_rcv_functions[] = {
1751         [RHF_RCV_TYPE_EXPECTED] = kdeth_process_expected,
1752         [RHF_RCV_TYPE_EAGER] = kdeth_process_eager,
1753         [RHF_RCV_TYPE_IB] = process_receive_ib,
1754         [RHF_RCV_TYPE_ERROR] = process_receive_error,
1755         [RHF_RCV_TYPE_BYPASS] = process_receive_bypass,
1756         [RHF_RCV_TYPE_INVALID5] = process_receive_invalid,
1757         [RHF_RCV_TYPE_INVALID6] = process_receive_invalid,
1758         [RHF_RCV_TYPE_INVALID7] = process_receive_invalid,
1759 };