drivers/staging/rdma/hfi1/driver.c

   1 /*
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2015 Intel Corporation.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * BSD LICENSE
  20  *
  21  * Copyright(c) 2015 Intel Corporation.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  *
  27  *  - Redistributions of source code must retain the above copyright
  28  *    notice, this list of conditions and the following disclaimer.
  29  *  - Redistributions in binary form must reproduce the above copyright
  30  *    notice, this list of conditions and the following disclaimer in
  31  *    the documentation and/or other materials provided with the
  32  *    distribution.
  33  *  - Neither the name of Intel Corporation nor the names of its
  34  *    contributors may be used to endorse or promote products derived
  35  *    from this software without specific prior written permission.
  36  *
  37  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  38  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  39  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  40  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  41  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  44  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  45  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  46  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  47  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  48  *
  49  */
  50
  51 #include <linux/spinlock.h>
  52 #include <linux/pci.h>
  53 #include <linux/io.h>
  54 #include <linux/delay.h>
  55 #include <linux/netdevice.h>
  56 #include <linux/vmalloc.h>
  57 #include <linux/module.h>
  58 #include <linux/prefetch.h>
  59
  60 #include "hfi.h"
  61 #include "trace.h"
  62 #include "qp.h"
  63 #include "sdma.h"
  64
  65 #undef pr_fmt
  66 #define pr_fmt(fmt) DRIVER_NAME ": " fmt
  67
  68 /*
  69  * The size has to be longer than this string, so we can append
  70  * board/chip information to it in the initialization code.
  71  */
  72 const char ib_hfi1_version[] = HFI1_DRIVER_VERSION "\n";
  73
  74 DEFINE_SPINLOCK(hfi1_devs_lock);
  75 LIST_HEAD(hfi1_dev_list);
  76 DEFINE_MUTEX(hfi1_mutex);       /* general driver use */
  77
  78 unsigned int hfi1_max_mtu = HFI1_DEFAULT_MAX_MTU;
  79 module_param_named(max_mtu, hfi1_max_mtu, uint, S_IRUGO);
  80 MODULE_PARM_DESC(max_mtu, "Set max MTU bytes, default is 8192");
  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 *, const struct kernel_param *);
  88 static int hfi1_caps_get(char *, const struct kernel_param *);
  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 MODULE_VERSION(HFI1_DRIVER_VERSION);
  99
 100 /*
 101  * MAX_PKT_RCV is the max # if packets processed per receive interrupt.
 102  */
 103 #define MAX_PKT_RECV 64
 104 #define EGR_HEAD_UPDATE_THRESHOLD 16
 105
 106 struct hfi1_ib_stats hfi1_stats;
 107
 108 static int hfi1_caps_set(const char *val, const struct kernel_param *kp)
 109 {
 110         int ret = 0;
 111         unsigned long *cap_mask_ptr = (unsigned long *)kp->arg,
 112                 cap_mask = *cap_mask_ptr, value, diff,
 113                 write_mask = ((HFI1_CAP_WRITABLE_MASK << HFI1_CAP_USER_SHIFT) |
 114                               HFI1_CAP_WRITABLE_MASK);
 115
 116         ret = kstrtoul(val, 0, &value);
 117         if (ret) {
 118                 pr_warn("Invalid module parameter value for 'cap_mask'\n");
 119                 goto done;
 120         }
 121         /* Get the changed bits (except the locked bit) */
 122         diff = value ^ (cap_mask & ~HFI1_CAP_LOCKED_SMASK);
 123
 124         /* Remove any bits that are not allowed to change after driver load */
 125         if (HFI1_CAP_LOCKED() && (diff & ~write_mask)) {
 126                 pr_warn("Ignoring non-writable capability bits %#lx\n",
 127                         diff & ~write_mask);
 128                 diff &= write_mask;
 129         }
 130
 131         /* Mask off any reserved bits */
 132         diff &= ~HFI1_CAP_RESERVED_MASK;
 133         /* Clear any previously set and changing bits */
 134         cap_mask &= ~diff;
 135         /* Update the bits with the new capability */
 136         cap_mask |= (value & diff);
 137         /* Check for any kernel/user restrictions */
 138         diff = (cap_mask & (HFI1_CAP_MUST_HAVE_KERN << HFI1_CAP_USER_SHIFT)) ^
 139                 ((cap_mask & HFI1_CAP_MUST_HAVE_KERN) << HFI1_CAP_USER_SHIFT);
 140         cap_mask &= ~diff;
 141         /* Set the bitmask to the final set */
 142         *cap_mask_ptr = cap_mask;
 143 done:
 144         return ret;
 145 }
 146
 147 static int hfi1_caps_get(char *buffer, const struct kernel_param *kp)
 148 {
 149         unsigned long cap_mask = *(unsigned long *)kp->arg;
 150
 151         cap_mask &= ~HFI1_CAP_LOCKED_SMASK;
 152         cap_mask |= ((cap_mask & HFI1_CAP_K2U) << HFI1_CAP_USER_SHIFT);
 153
 154         return scnprintf(buffer, PAGE_SIZE, "0x%lx", cap_mask);
 155 }
 156
 157 const char *get_unit_name(int unit)
 158 {
 159         static char iname[16];
 160
 161         snprintf(iname, sizeof(iname), DRIVER_NAME"_%u", unit);
 162         return iname;
 163 }
 164
 165 /*
 166  * Return count of units with at least one port ACTIVE.
 167  */
 168 int hfi1_count_active_units(void)
 169 {
 170         struct hfi1_devdata *dd;
 171         struct hfi1_pportdata *ppd;
 172         unsigned long flags;
 173         int pidx, nunits_active = 0;
 174
 175         spin_lock_irqsave(&hfi1_devs_lock, flags);
 176         list_for_each_entry(dd, &hfi1_dev_list, list) {
 177                 if (!(dd->flags & HFI1_PRESENT) || !dd->kregbase)
 178                         continue;
 179                 for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 180                         ppd = dd->pport + pidx;
 181                         if (ppd->lid && ppd->linkup) {
 182                                 nunits_active++;
 183                                 break;
 184                         }
 185                 }
 186         }
 187         spin_unlock_irqrestore(&hfi1_devs_lock, flags);
 188         return nunits_active;
 189 }
 190
 191 /*
 192  * Return count of all units, optionally return in arguments
 193  * the number of usable (present) units, and the number of
 194  * ports that are up.
 195  */
 196 int hfi1_count_units(int *npresentp, int *nupp)
 197 {
 198         int nunits = 0, npresent = 0, nup = 0;
 199         struct hfi1_devdata *dd;
 200         unsigned long flags;
 201         int pidx;
 202         struct hfi1_pportdata *ppd;
 203
 204         spin_lock_irqsave(&hfi1_devs_lock, flags);
 205
 206         list_for_each_entry(dd, &hfi1_dev_list, list) {
 207                 nunits++;
 208                 if ((dd->flags & HFI1_PRESENT) && dd->kregbase)
 209                         npresent++;
 210                 for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 211                         ppd = dd->pport + pidx;
 212                         if (ppd->lid && ppd->linkup)
 213                                 nup++;
 214                 }
 215         }
 216
 217         spin_unlock_irqrestore(&hfi1_devs_lock, flags);
 218
 219         if (npresentp)
 220                 *npresentp = npresent;
 221         if (nupp)
 222                 *nupp = nup;
 223
 224         return nunits;
 225 }
 226
 227 /*
 228  * Get address of eager buffer from it's index (allocated in chunks, not
 229  * contiguous).
 230  */
 231 static inline void *get_egrbuf(const struct hfi1_ctxtdata *rcd, u64 rhf,
 232                                u8 *update)
 233 {
 234         u32 idx = rhf_egr_index(rhf), offset = rhf_egr_buf_offset(rhf);
 235
 236         *update |= !(idx & (rcd->egrbufs.threshold - 1)) && !offset;
 237         return (void *)(((u64)(rcd->egrbufs.rcvtids[idx].addr)) +
 238                         (offset * RCV_BUF_BLOCK_SIZE));
 239 }
 240
 241 /*
 242  * Validate and encode the a given RcvArray Buffer size.
 243  * The function will check whether the given size falls within
 244  * allowed size ranges for the respective type and, optionally,
 245  * return the proper encoding.
 246  */
 247 inline int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encoded)
 248 {
 249         if (unlikely(!IS_ALIGNED(size, PAGE_SIZE)))
 250                 return 0;
 251         if (unlikely(size < MIN_EAGER_BUFFER))
 252                 return 0;
 253         if (size >
 254             (type == PT_EAGER ? MAX_EAGER_BUFFER : MAX_EXPECTED_BUFFER))
 255                 return 0;
 256         if (encoded)
 257                 *encoded = ilog2(size / PAGE_SIZE) + 1;
 258         return 1;
 259 }
 260
 261 static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
 262                        struct hfi1_packet *packet)
 263 {
 264         struct hfi1_message_header *rhdr = packet->hdr;
 265         u32 rte = rhf_rcv_type_err(packet->rhf);
 266         int lnh = be16_to_cpu(rhdr->lrh[0]) & 3;
 267         struct hfi1_ibport *ibp = &ppd->ibport_data;
 268
 269         if (packet->rhf & (RHF_VCRC_ERR | RHF_ICRC_ERR))
 270                 return;
 271
 272         if (packet->rhf & RHF_TID_ERR) {
 273                 /* For TIDERR and RC QPs preemptively schedule a NAK */
 274                 struct hfi1_ib_header *hdr = (struct hfi1_ib_header *)rhdr;
 275                 struct hfi1_other_headers *ohdr = NULL;
 276                 u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */
 277                 u16 lid  = be16_to_cpu(hdr->lrh[1]);
 278                 u32 qp_num;
 279                 u32 rcv_flags = 0;
 280
 281                 /* Sanity check packet */
 282                 if (tlen < 24)
 283                         goto drop;
 284
 285                 /* Check for GRH */
 286                 if (lnh == HFI1_LRH_BTH)
 287                         ohdr = &hdr->u.oth;
 288                 else if (lnh == HFI1_LRH_GRH) {
 289                         u32 vtf;
 290
 291                         ohdr = &hdr->u.l.oth;
 292                         if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR)
 293                                 goto drop;
 294                         vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow);
 295                         if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
 296                                 goto drop;
 297                         rcv_flags |= HFI1_HAS_GRH;
 298                 } else
 299                         goto drop;
 300
 301                 /* Get the destination QP number. */
 302                 qp_num = be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
 303                 if (lid < HFI1_MULTICAST_LID_BASE) {
 304                         struct hfi1_qp *qp;
 305
 306                         rcu_read_lock();
 307                         qp = hfi1_lookup_qpn(ibp, qp_num);
 308                         if (!qp) {
 309                                 rcu_read_unlock();
 310                                 goto drop;
 311                         }
 312
 313                         /*
 314                          * Handle only RC QPs - for other QP types drop error
 315                          * packet.
 316                          */
 317                         spin_lock(&qp->r_lock);
 318
 319                         /* Check for valid receive state. */
 320                         if (!(ib_hfi1_state_ops[qp->state] &
 321                               HFI1_PROCESS_RECV_OK)) {
 322                                 ibp->n_pkt_drops++;
 323                         }
 324
 325                         switch (qp->ibqp.qp_type) {
 326                         case IB_QPT_RC:
 327                                 hfi1_rc_hdrerr(
 328                                         rcd,
 329                                         hdr,
 330                                         rcv_flags,
 331                                         qp);
 332                                 break;
 333                         default:
 334                                 /* For now don't handle any other QP types */
 335                                 break;
 336                         }
 337
 338                         spin_unlock(&qp->r_lock);
 339                         rcu_read_unlock();
 340                 } /* Unicast QP */
 341         } /* Valid packet with TIDErr */
 342
 343         /* handle "RcvTypeErr" flags */
 344         switch (rte) {
 345         case RHF_RTE_ERROR_OP_CODE_ERR:
 346         {
 347                 u32 opcode;
 348                 void *ebuf = NULL;
 349                 __be32 *bth = NULL;
 350
 351                 if (rhf_use_egr_bfr(packet->rhf))
 352                         ebuf = packet->ebuf;
 353
 354                 if (ebuf == NULL)
 355                         goto drop; /* this should never happen */
 356
 357                 if (lnh == HFI1_LRH_BTH)
 358                         bth = (__be32 *)ebuf;
 359                 else if (lnh == HFI1_LRH_GRH)
 360                         bth = (__be32 *)((char *)ebuf + sizeof(struct ib_grh));
 361                 else
 362                         goto drop;
 363
 364                 opcode = be32_to_cpu(bth[0]) >> 24;
 365                 opcode &= 0xff;
 366
 367                 if (opcode == IB_OPCODE_CNP) {
 368                         /*
 369                          * Only in pre-B0 h/w is the CNP_OPCODE handled
 370                          * via this code path (errata 291394).
 371                          */
 372                         struct hfi1_qp *qp = NULL;
 373                         u32 lqpn, rqpn;
 374                         u16 rlid;
 375                         u8 svc_type, sl, sc5;
 376
 377                         sc5  = (be16_to_cpu(rhdr->lrh[0]) >> 12) & 0xf;
 378                         if (rhf_dc_info(packet->rhf))
 379                                 sc5 |= 0x10;
 380                         sl = ibp->sc_to_sl[sc5];
 381
 382                         lqpn = be32_to_cpu(bth[1]) & HFI1_QPN_MASK;
 383                         rcu_read_lock();
 384                         qp = hfi1_lookup_qpn(ibp, lqpn);
 385                         if (qp == NULL) {
 386                                 rcu_read_unlock();
 387                                 goto drop;
 388                         }
 389
 390                         switch (qp->ibqp.qp_type) {
 391                         case IB_QPT_UD:
 392                                 rlid = 0;
 393                                 rqpn = 0;
 394                                 svc_type = IB_CC_SVCTYPE_UD;
 395                                 break;
 396                         case IB_QPT_UC:
 397                                 rlid = be16_to_cpu(rhdr->lrh[3]);
 398                                 rqpn = qp->remote_qpn;
 399                                 svc_type = IB_CC_SVCTYPE_UC;
 400                                 break;
 401                         default:
 402                                 goto drop;
 403                         }
 404
 405                         process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
 406                         rcu_read_unlock();
 407                 }
 408
 409                 packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK;
 410                 break;
 411         }
 412         default:
 413                 break;
 414         }
 415
 416 drop:
 417         return;
 418 }
 419
 420 static inline void init_packet(struct hfi1_ctxtdata *rcd,
 421                               struct hfi1_packet *packet)
 422 {
 423
 424         packet->rsize = rcd->rcvhdrqentsize; /* words */
 425         packet->maxcnt = rcd->rcvhdrq_cnt * packet->rsize; /* words */
 426         packet->rcd = rcd;
 427         packet->updegr = 0;
 428         packet->etail = -1;
 429         packet->rhf_addr = (__le32 *) rcd->rcvhdrq + rcd->head +
 430                            rcd->dd->rhf_offset;
 431         packet->rhf = rhf_to_cpu(packet->rhf_addr);
 432         packet->rhqoff = rcd->head;
 433         packet->numpkt = 0;
 434         packet->rcv_flags = 0;
 435 }
 436
 437 #ifndef CONFIG_PRESCAN_RXQ
 438 static void prescan_rxq(struct hfi1_packet *packet) {}
 439 #else /* CONFIG_PRESCAN_RXQ */
 440 static int prescan_receive_queue;
 441
 442 static void process_ecn(struct hfi1_qp *qp, struct hfi1_ib_header *hdr,
 443                         struct hfi1_other_headers *ohdr,
 444                         u64 rhf, struct ib_grh *grh)
 445 {
 446         struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
 447         u32 bth1;
 448         u8 sc5, svc_type;
 449         int is_fecn, is_becn;
 450
 451         switch (qp->ibqp.qp_type) {
 452         case IB_QPT_UD:
 453                 svc_type = IB_CC_SVCTYPE_UD;
 454                 break;
 455         case IB_QPT_UC: /* LATER */
 456         case IB_QPT_RC: /* LATER */
 457         default:
 458                 return;
 459         }
 460
 461         is_fecn = (be32_to_cpu(ohdr->bth[1]) >> HFI1_FECN_SHIFT) &
 462                         HFI1_FECN_MASK;
 463         is_becn = (be32_to_cpu(ohdr->bth[1]) >> HFI1_BECN_SHIFT) &
 464                         HFI1_BECN_MASK;
 465
 466         sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf;
 467         if (rhf_dc_info(rhf))
 468                 sc5 |= 0x10;
 469
 470         if (is_fecn) {
 471                 u32 src_qpn = be32_to_cpu(ohdr->u.ud.deth[1]) & HFI1_QPN_MASK;
 472                 u16 pkey = (u16)be32_to_cpu(ohdr->bth[0]);
 473                 u16 dlid = be16_to_cpu(hdr->lrh[1]);
 474                 u16 slid = be16_to_cpu(hdr->lrh[3]);
 475
 476                 return_cnp(ibp, qp, src_qpn, pkey, dlid, slid, sc5, grh);
 477         }
 478
 479         if (is_becn) {
 480                 struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
 481                 u32 lqpn =  be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
 482                 u8 sl = ibp->sc_to_sl[sc5];
 483
 484                 process_becn(ppd, sl, 0, lqpn, 0, svc_type);
 485         }
 486
 487         /* turn off BECN, or FECN */
 488         bth1 = be32_to_cpu(ohdr->bth[1]);
 489         bth1 &= ~(HFI1_FECN_MASK << HFI1_FECN_SHIFT);
 490         bth1 &= ~(HFI1_BECN_MASK << HFI1_BECN_SHIFT);
 491         ohdr->bth[1] = cpu_to_be32(bth1);
 492 }
 493
 494 struct ps_mdata {
 495         struct hfi1_ctxtdata *rcd;
 496         u32 rsize;
 497         u32 maxcnt;
 498         u32 ps_head;
 499         u32 ps_tail;
 500         u32 ps_seq;
 501 };
 502
 503 static inline void init_ps_mdata(struct ps_mdata *mdata,
 504                                  struct hfi1_packet *packet)
 505 {
 506         struct hfi1_ctxtdata *rcd = packet->rcd;
 507
 508         mdata->rcd = rcd;
 509         mdata->rsize = packet->rsize;
 510         mdata->maxcnt = packet->maxcnt;
 511
 512         if (rcd->ps_state.initialized == 0) {
 513                 mdata->ps_head = packet->rhqoff;
 514                 rcd->ps_state.initialized++;
 515         } else
 516                 mdata->ps_head = rcd->ps_state.ps_head;
 517
 518         if (HFI1_CAP_IS_KSET(DMA_RTAIL)) {
 519                 mdata->ps_tail = packet->hdrqtail;
 520                 mdata->ps_seq = 0; /* not used with DMA_RTAIL */
 521         } else {
 522                 mdata->ps_tail = 0; /* used only with DMA_RTAIL*/
 523                 mdata->ps_seq = rcd->seq_cnt;
 524         }
 525 }
 526
 527 static inline int ps_done(struct ps_mdata *mdata, u64 rhf)
 528 {
 529         if (HFI1_CAP_IS_KSET(DMA_RTAIL))
 530                 return mdata->ps_head == mdata->ps_tail;
 531         return mdata->ps_seq != rhf_rcv_seq(rhf);
 532 }
 533
 534 static inline void update_ps_mdata(struct ps_mdata *mdata)
 535 {
 536         struct hfi1_ctxtdata *rcd = mdata->rcd;
 537
 538         mdata->ps_head += mdata->rsize;
 539         if (mdata->ps_head > mdata->maxcnt)
 540                 mdata->ps_head = 0;
 541         rcd->ps_state.ps_head = mdata->ps_head;
 542         if (!HFI1_CAP_IS_KSET(DMA_RTAIL)) {
 543                 if (++mdata->ps_seq > 13)
 544                         mdata->ps_seq = 1;
 545         }
 546 }
 547
 548 /*
 549  * prescan_rxq - search through the receive queue looking for packets
 550  * containing Excplicit Congestion Notifications (FECNs, or BECNs).
 551  * When an ECN is found, process the Congestion Notification, and toggle
 552  * it off.
 553  */
 554 static void prescan_rxq(struct hfi1_packet *packet)
 555 {
 556         struct hfi1_ctxtdata *rcd = packet->rcd;
 557         struct ps_mdata mdata;
 558
 559         if (!prescan_receive_queue)
 560                 return;
 561
 562         init_ps_mdata(&mdata, packet);
 563
 564         while (1) {
 565                 struct hfi1_devdata *dd = rcd->dd;
 566                 struct hfi1_ibport *ibp = &rcd->ppd->ibport_data;
 567                 __le32 *rhf_addr = (__le32 *) rcd->rcvhdrq + mdata.ps_head +
 568                                          dd->rhf_offset;
 569                 struct hfi1_qp *qp;
 570                 struct hfi1_ib_header *hdr;
 571                 struct hfi1_other_headers *ohdr;
 572                 struct ib_grh *grh = NULL;
 573                 u64 rhf = rhf_to_cpu(rhf_addr);
 574                 u32 etype = rhf_rcv_type(rhf), qpn;
 575                 int is_ecn = 0;
 576                 u8 lnh;
 577
 578                 if (ps_done(&mdata, rhf))
 579                         break;
 580
 581                 if (etype != RHF_RCV_TYPE_IB)
 582                         goto next;
 583
 584                 hdr = (struct hfi1_ib_header *)
 585                         hfi1_get_msgheader(dd, rhf_addr);
 586                 lnh = be16_to_cpu(hdr->lrh[0]) & 3;
 587
 588                 if (lnh == HFI1_LRH_BTH)
 589                         ohdr = &hdr->u.oth;
 590                 else if (lnh == HFI1_LRH_GRH) {
 591                         ohdr = &hdr->u.l.oth;
 592                         grh = &hdr->u.l.grh;
 593                 } else
 594                         goto next; /* just in case */
 595
 596                 is_ecn |= be32_to_cpu(ohdr->bth[1]) &
 597                         (HFI1_FECN_MASK << HFI1_FECN_SHIFT);
 598                 is_ecn |= be32_to_cpu(ohdr->bth[1]) &
 599                         (HFI1_BECN_MASK << HFI1_BECN_SHIFT);
 600
 601                 if (!is_ecn)
 602                         goto next;
 603
 604                 qpn = be32_to_cpu(ohdr->bth[1]) & HFI1_QPN_MASK;
 605                 rcu_read_lock();
 606                 qp = hfi1_lookup_qpn(ibp, qpn);
 607
 608                 if (qp == NULL) {
 609                         rcu_read_unlock();
 610                         goto next;
 611                 }
 612
 613                 process_ecn(qp, hdr, ohdr, rhf, grh);
 614                 rcu_read_unlock();
 615 next:
 616                 update_ps_mdata(&mdata);
 617         }
 618 }
 619 #endif /* CONFIG_PRESCAN_RXQ */
 620
 621 #define RCV_PKT_OK 0x0
 622 #define RCV_PKT_MAX 0x1
 623
 624 static inline int process_rcv_packet(struct hfi1_packet *packet)
 625 {
 626         int ret = RCV_PKT_OK;
 627
 628         packet->hdr = hfi1_get_msgheader(packet->rcd->dd,
 629                                          packet->rhf_addr);
 630         packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
 631         packet->etype = rhf_rcv_type(packet->rhf);
 632         /* total length */
 633         packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */
 634         /* retrieve eager buffer details */
 635         packet->ebuf = NULL;
 636         if (rhf_use_egr_bfr(packet->rhf)) {
 637                 packet->etail = rhf_egr_index(packet->rhf);
 638                 packet->ebuf = get_egrbuf(packet->rcd, packet->rhf,
 639                                  &packet->updegr);
 640                 /*
 641                  * Prefetch the contents of the eager buffer.  It is
 642                  * OK to send a negative length to prefetch_range().
 643                  * The +2 is the size of the RHF.
 644                  */
 645                 prefetch_range(packet->ebuf,
 646                         packet->tlen - ((packet->rcd->rcvhdrqentsize -
 647                                   (rhf_hdrq_offset(packet->rhf)+2)) * 4));
 648         }
 649
 650         /*
 651          * Call a type specific handler for the packet. We
 652          * should be able to trust that etype won't be beyond
 653          * the range of valid indexes. If so something is really
 654          * wrong and we can probably just let things come
 655          * crashing down. There is no need to eat another
 656          * comparison in this performance critical code.
 657          */
 658         packet->rcd->dd->rhf_rcv_function_map[packet->etype](packet);
 659         packet->numpkt++;
 660
 661         /* Set up for the next packet */
 662         packet->rhqoff += packet->rsize;
 663         if (packet->rhqoff >= packet->maxcnt)
 664                 packet->rhqoff = 0;
 665
 666         if (packet->numpkt == MAX_PKT_RECV) {
 667                 ret = RCV_PKT_MAX;
 668                 this_cpu_inc(*packet->rcd->dd->rcv_limit);
 669         }
 670
 671         packet->rhf_addr = (__le32 *) packet->rcd->rcvhdrq + packet->rhqoff +
 672                                       packet->rcd->dd->rhf_offset;
 673         packet->rhf = rhf_to_cpu(packet->rhf_addr);
 674
 675         return ret;
 676 }
 677
 678 static inline void process_rcv_update(int last, struct hfi1_packet *packet)
 679 {
 680         /*
 681          * Update head regs etc., every 16 packets, if not last pkt,
 682          * to help prevent rcvhdrq overflows, when many packets
 683          * are processed and queue is nearly full.
 684          * Don't request an interrupt for intermediate updates.
 685          */
 686         if (!last && !(packet->numpkt & 0xf)) {
 687                 update_usrhead(packet->rcd, packet->rhqoff, packet->updegr,
 688                                packet->etail, 0, 0);
 689                 packet->updegr = 0;
 690         }
 691         packet->rcv_flags = 0;
 692 }
 693
 694 static inline void finish_packet(struct hfi1_packet *packet)
 695 {
 696
 697         /*
 698          * Nothing we need to free for the packet.
 699          *
 700          * The only thing we need to do is a final update and call for an
 701          * interrupt
 702          */
 703         update_usrhead(packet->rcd, packet->rcd->head, packet->updegr,
 704                        packet->etail, rcv_intr_dynamic, packet->numpkt);
 705
 706 }
 707
 708 static inline void process_rcv_qp_work(struct hfi1_packet *packet)
 709 {
 710
 711         struct hfi1_ctxtdata *rcd;
 712         struct hfi1_qp *qp, *nqp;
 713
 714         rcd = packet->rcd;
 715         rcd->head = packet->rhqoff;
 716
 717         /*
 718          * Iterate over all QPs waiting to respond.
 719          * The list won't change since the IRQ is only run on one CPU.
 720          */
 721         list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) {
 722                 list_del_init(&qp->rspwait);
 723                 if (qp->r_flags & HFI1_R_RSP_NAK) {
 724                         qp->r_flags &= ~HFI1_R_RSP_NAK;
 725                         hfi1_send_rc_ack(rcd, qp, 0);
 726                 }
 727                 if (qp->r_flags & HFI1_R_RSP_SEND) {
 728                         unsigned long flags;
 729
 730                         qp->r_flags &= ~HFI1_R_RSP_SEND;
 731                         spin_lock_irqsave(&qp->s_lock, flags);
 732                         if (ib_hfi1_state_ops[qp->state] &
 733                                         HFI1_PROCESS_OR_FLUSH_SEND)
 734                                 hfi1_schedule_send(qp);
 735                         spin_unlock_irqrestore(&qp->s_lock, flags);
 736                 }
 737                 if (atomic_dec_and_test(&qp->refcount))
 738                         wake_up(&qp->wait);
 739         }
 740 }
 741
 742 /*
 743  * Handle receive interrupts when using the no dma rtail option.
 744  */
 745 void handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd)
 746 {
 747         u32 seq;
 748         int last = 0;
 749         struct hfi1_packet packet;
 750
 751         init_packet(rcd, &packet);
 752         seq = rhf_rcv_seq(packet.rhf);
 753         if (seq != rcd->seq_cnt)
 754                 goto bail;
 755
 756         prescan_rxq(&packet);
 757
 758         while (!last) {
 759                 last = process_rcv_packet(&packet);
 760                 seq = rhf_rcv_seq(packet.rhf);
 761                 if (++rcd->seq_cnt > 13)
 762                         rcd->seq_cnt = 1;
 763                 if (seq != rcd->seq_cnt)
 764                         last = 1;
 765                 process_rcv_update(last, &packet);
 766         }
 767         process_rcv_qp_work(&packet);
 768 bail:
 769         finish_packet(&packet);
 770 }
 771
 772 void handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd)
 773 {
 774         u32 hdrqtail;
 775         int last = 0;
 776         struct hfi1_packet packet;
 777
 778         init_packet(rcd, &packet);
 779         hdrqtail = get_rcvhdrtail(rcd);
 780         if (packet.rhqoff == hdrqtail)
 781                 goto bail;
 782         smp_rmb();  /* prevent speculative reads of dma'ed hdrq */
 783
 784         prescan_rxq(&packet);
 785
 786         while (!last) {
 787                 last = process_rcv_packet(&packet);
 788                 if (packet.rhqoff == hdrqtail)
 789                         last = 1;
 790                 process_rcv_update(last, &packet);
 791         }
 792         process_rcv_qp_work(&packet);
 793 bail:
 794         finish_packet(&packet);
 795
 796 }
 797
 798 static inline void set_all_nodma_rtail(struct hfi1_devdata *dd)
 799 {
 800         int i;
 801
 802         for (i = 0; i < dd->first_user_ctxt; i++)
 803                 dd->rcd[i]->do_interrupt =
 804                         &handle_receive_interrupt_nodma_rtail;
 805 }
 806
 807 static inline void set_all_dma_rtail(struct hfi1_devdata *dd)
 808 {
 809         int i;
 810
 811         for (i = 0; i < dd->first_user_ctxt; i++)
 812                 dd->rcd[i]->do_interrupt =
 813                         &handle_receive_interrupt_dma_rtail;
 814 }
 815
 816 /*
 817  * handle_receive_interrupt - receive a packet
 818  * @rcd: the context
 819  *
 820  * Called from interrupt handler for errors or receive interrupt.
 821  * This is the slow path interrupt handler.
 822  */
 823 void handle_receive_interrupt(struct hfi1_ctxtdata *rcd)
 824 {
 825
 826         struct hfi1_devdata *dd = rcd->dd;
 827         u32 hdrqtail;
 828         int last = 0, needset = 1;
 829         struct hfi1_packet packet;
 830
 831         init_packet(rcd, &packet);
 832
 833         if (!HFI1_CAP_IS_KSET(DMA_RTAIL)) {
 834                 u32 seq = rhf_rcv_seq(packet.rhf);
 835
 836                 if (seq != rcd->seq_cnt)
 837                         goto bail;
 838                 hdrqtail = 0;
 839         } else {
 840                 hdrqtail = get_rcvhdrtail(rcd);
 841                 if (packet.rhqoff == hdrqtail)
 842                         goto bail;
 843                 smp_rmb();  /* prevent speculative reads of dma'ed hdrq */
 844         }
 845
 846         prescan_rxq(&packet);
 847
 848         while (!last) {
 849
 850                 if (unlikely(dd->do_drop && atomic_xchg(&dd->drop_packet,
 851                         DROP_PACKET_OFF) == DROP_PACKET_ON)) {
 852                         dd->do_drop = 0;
 853
 854                         /* On to the next packet */
 855                         packet.rhqoff += packet.rsize;
 856                         packet.rhf_addr = (__le32 *) rcd->rcvhdrq +
 857                                           packet.rhqoff +
 858                                           dd->rhf_offset;
 859                         packet.rhf = rhf_to_cpu(packet.rhf_addr);
 860
 861                 } else {
 862                         last = process_rcv_packet(&packet);
 863                 }
 864
 865                 if (!HFI1_CAP_IS_KSET(DMA_RTAIL)) {
 866                         u32 seq = rhf_rcv_seq(packet.rhf);
 867
 868                         if (++rcd->seq_cnt > 13)
 869                                 rcd->seq_cnt = 1;
 870                         if (seq != rcd->seq_cnt)
 871                                 last = 1;
 872                         if (needset) {
 873                                 dd_dev_info(dd,
 874                                         "Switching to NO_DMA_RTAIL\n");
 875                                 set_all_nodma_rtail(dd);
 876                                 needset = 0;
 877                         }
 878                 } else {
 879                         if (packet.rhqoff == hdrqtail)
 880                                 last = 1;
 881                         if (needset) {
 882                                 dd_dev_info(dd,
 883                                             "Switching to DMA_RTAIL\n");
 884                                 set_all_dma_rtail(dd);
 885                                 needset = 0;
 886                         }
 887                 }
 888
 889                 process_rcv_update(last, &packet);
 890         }
 891
 892         process_rcv_qp_work(&packet);
 893
 894 bail:
 895         /*
 896          * Always write head at end, and setup rcv interrupt, even
 897          * if no packets were processed.
 898          */
 899         finish_packet(&packet);
 900 }
 901
 902 /*
 903  * Convert a given MTU size to the on-wire MAD packet enumeration.
 904  * Return -1 if the size is invalid.
 905  */
 906 int mtu_to_enum(u32 mtu, int default_if_bad)
 907 {
 908         switch (mtu) {
 909         case     0: return OPA_MTU_0;
 910         case   256: return OPA_MTU_256;
 911         case   512: return OPA_MTU_512;
 912         case  1024: return OPA_MTU_1024;
 913         case  2048: return OPA_MTU_2048;
 914         case  4096: return OPA_MTU_4096;
 915         case  8192: return OPA_MTU_8192;
 916         case 10240: return OPA_MTU_10240;
 917         }
 918         return default_if_bad;
 919 }
 920
 921 u16 enum_to_mtu(int mtu)
 922 {
 923         switch (mtu) {
 924         case OPA_MTU_0:     return 0;
 925         case OPA_MTU_256:   return 256;
 926         case OPA_MTU_512:   return 512;
 927         case OPA_MTU_1024:  return 1024;
 928         case OPA_MTU_2048:  return 2048;
 929         case OPA_MTU_4096:  return 4096;
 930         case OPA_MTU_8192:  return 8192;
 931         case OPA_MTU_10240: return 10240;
 932         default: return 0xffff;
 933         }
 934 }
 935
 936 /*
 937  * set_mtu - set the MTU
 938  * @ppd: the per port data
 939  *
 940  * We can handle "any" incoming size, the issue here is whether we
 941  * need to restrict our outgoing size.  We do not deal with what happens
 942  * to programs that are already running when the size changes.
 943  */
 944 int set_mtu(struct hfi1_pportdata *ppd)
 945 {
 946         struct hfi1_devdata *dd = ppd->dd;
 947         int i, drain, ret = 0, is_up = 0;
 948
 949         ppd->ibmtu = 0;
 950         for (i = 0; i < ppd->vls_supported; i++)
 951                 if (ppd->ibmtu < dd->vld[i].mtu)
 952                         ppd->ibmtu = dd->vld[i].mtu;
 953         ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd);
 954
 955         mutex_lock(&ppd->hls_lock);
 956         if (ppd->host_link_state == HLS_UP_INIT
 957                         || ppd->host_link_state == HLS_UP_ARMED
 958                         || ppd->host_link_state == HLS_UP_ACTIVE)
 959                 is_up = 1;
 960
 961         drain = !is_ax(dd) && is_up;
 962
 963         if (drain)
 964                 /*
 965                  * MTU is specified per-VL. To ensure that no packet gets
 966                  * stuck (due, e.g., to the MTU for the packet's VL being
 967                  * reduced), empty the per-VL FIFOs before adjusting MTU.
 968                  */
 969                 ret = stop_drain_data_vls(dd);
 970
 971         if (ret) {
 972                 dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n",
 973                            __func__);
 974                 goto err;
 975         }
 976
 977         hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0);
 978
 979         if (drain)
 980                 open_fill_data_vls(dd); /* reopen all VLs */
 981
 982 err:
 983         mutex_unlock(&ppd->hls_lock);
 984
 985         return ret;
 986 }
 987
 988 int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc)
 989 {
 990         struct hfi1_devdata *dd = ppd->dd;
 991
 992         ppd->lid = lid;
 993         ppd->lmc = lmc;
 994         hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0);
 995
 996         dd_dev_info(dd, "IB%u:%u got a lid: 0x%x\n", dd->unit, ppd->port, lid);
 997
 998         return 0;
 999 }
1000
1001 /*
1002  * Following deal with the "obviously simple" task of overriding the state
1003  * of the LEDs, which normally indicate link physical and logical status.
1004  * The complications arise in dealing with different hardware mappings
1005  * and the board-dependent routine being called from interrupts.
1006  * and then there's the requirement to _flash_ them.
1007  */
1008 #define LED_OVER_FREQ_SHIFT 8
1009 #define LED_OVER_FREQ_MASK (0xFF<<LED_OVER_FREQ_SHIFT)
1010 /* Below is "non-zero" to force override, but both actual LEDs are off */
1011 #define LED_OVER_BOTH_OFF (8)
1012
1013 static void run_led_override(unsigned long opaque)
1014 {
1015         struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)opaque;
1016         struct hfi1_devdata *dd = ppd->dd;
1017         int timeoff;
1018         int ph_idx;
1019
1020         if (!(dd->flags & HFI1_INITTED))
1021                 return;
1022
1023         ph_idx = ppd->led_override_phase++ & 1;
1024         ppd->led_override = ppd->led_override_vals[ph_idx];
1025         timeoff = ppd->led_override_timeoff;
1026
1027         /*
1028          * don't re-fire the timer if user asked for it to be off; we let
1029          * it fire one more time after they turn it off to simplify
1030          */
1031         if (ppd->led_override_vals[0] || ppd->led_override_vals[1])
1032                 mod_timer(&ppd->led_override_timer, jiffies + timeoff);
1033 }
1034
1035 void hfi1_set_led_override(struct hfi1_pportdata *ppd, unsigned int val)
1036 {
1037         struct hfi1_devdata *dd = ppd->dd;
1038         int timeoff, freq;
1039
1040         if (!(dd->flags & HFI1_INITTED))
1041                 return;
1042
1043         /* First check if we are blinking. If not, use 1HZ polling */
1044         timeoff = HZ;
1045         freq = (val & LED_OVER_FREQ_MASK) >> LED_OVER_FREQ_SHIFT;
1046
1047         if (freq) {
1048                 /* For blink, set each phase from one nybble of val */
1049                 ppd->led_override_vals[0] = val & 0xF;
1050                 ppd->led_override_vals[1] = (val >> 4) & 0xF;
1051                 timeoff = (HZ << 4)/freq;
1052         } else {
1053                 /* Non-blink set both phases the same. */
1054                 ppd->led_override_vals[0] = val & 0xF;
1055                 ppd->led_override_vals[1] = val & 0xF;
1056         }
1057         ppd->led_override_timeoff = timeoff;
1058
1059         /*
1060          * If the timer has not already been started, do so. Use a "quick"
1061          * timeout so the function will be called soon, to look at our request.
1062          */
1063         if (atomic_inc_return(&ppd->led_override_timer_active) == 1) {
1064                 /* Need to start timer */
1065                 init_timer(&ppd->led_override_timer);
1066                 ppd->led_override_timer.function = run_led_override;
1067                 ppd->led_override_timer.data = (unsigned long) ppd;
1068                 ppd->led_override_timer.expires = jiffies + 1;
1069                 add_timer(&ppd->led_override_timer);
1070         } else {
1071                 if (ppd->led_override_vals[0] || ppd->led_override_vals[1])
1072                         mod_timer(&ppd->led_override_timer, jiffies + 1);
1073                 atomic_dec(&ppd->led_override_timer_active);
1074         }
1075 }
1076
1077 /**
1078  * hfi1_reset_device - reset the chip if possible
1079  * @unit: the device to reset
1080  *
1081  * Whether or not reset is successful, we attempt to re-initialize the chip
1082  * (that is, much like a driver unload/reload).  We clear the INITTED flag
1083  * so that the various entry points will fail until we reinitialize.  For
1084  * now, we only allow this if no user contexts are open that use chip resources
1085  */
1086 int hfi1_reset_device(int unit)
1087 {
1088         int ret, i;
1089         struct hfi1_devdata *dd = hfi1_lookup(unit);
1090         struct hfi1_pportdata *ppd;
1091         unsigned long flags;
1092         int pidx;
1093
1094         if (!dd) {
1095                 ret = -ENODEV;
1096                 goto bail;
1097         }
1098
1099         dd_dev_info(dd, "Reset on unit %u requested\n", unit);
1100
1101         if (!dd->kregbase || !(dd->flags & HFI1_PRESENT)) {
1102                 dd_dev_info(dd,
1103                         "Invalid unit number %u or not initialized or not present\n",
1104                         unit);
1105                 ret = -ENXIO;
1106                 goto bail;
1107         }
1108
1109         spin_lock_irqsave(&dd->uctxt_lock, flags);
1110         if (dd->rcd)
1111                 for (i = dd->first_user_ctxt; i < dd->num_rcv_contexts; i++) {
1112                         if (!dd->rcd[i] || !dd->rcd[i]->cnt)
1113                                 continue;
1114                         spin_unlock_irqrestore(&dd->uctxt_lock, flags);
1115                         ret = -EBUSY;
1116                         goto bail;
1117                 }
1118         spin_unlock_irqrestore(&dd->uctxt_lock, flags);
1119
1120         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
1121                 ppd = dd->pport + pidx;
1122                 if (atomic_read(&ppd->led_override_timer_active)) {
1123                         /* Need to stop LED timer, _then_ shut off LEDs */
1124                         del_timer_sync(&ppd->led_override_timer);
1125                         atomic_set(&ppd->led_override_timer_active, 0);
1126                 }
1127
1128                 /* Shut off LEDs after we are sure timer is not running */
1129                 ppd->led_override = LED_OVER_BOTH_OFF;
1130         }
1131         if (dd->flags & HFI1_HAS_SEND_DMA)
1132                 sdma_exit(dd);
1133
1134         hfi1_reset_cpu_counters(dd);
1135
1136         ret = hfi1_init(dd, 1);
1137
1138         if (ret)
1139                 dd_dev_err(dd,
1140                         "Reinitialize unit %u after reset failed with %d\n",
1141                         unit, ret);
1142         else
1143                 dd_dev_info(dd, "Reinitialized unit %u after resetting\n",
1144                         unit);
1145
1146 bail:
1147         return ret;
1148 }
1149
1150 void handle_eflags(struct hfi1_packet *packet)
1151 {
1152         struct hfi1_ctxtdata *rcd = packet->rcd;
1153         u32 rte = rhf_rcv_type_err(packet->rhf);
1154
1155         dd_dev_err(rcd->dd,
1156                 "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n",
1157                 rcd->ctxt, packet->rhf,
1158                 packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "",
1159                 packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "",
1160                 packet->rhf & RHF_DC_ERR ? "dc " : "",
1161                 packet->rhf & RHF_TID_ERR ? "tid " : "",
1162                 packet->rhf & RHF_LEN_ERR ? "len " : "",
1163                 packet->rhf & RHF_ECC_ERR ? "ecc " : "",
1164                 packet->rhf & RHF_VCRC_ERR ? "vcrc " : "",
1165                 packet->rhf & RHF_ICRC_ERR ? "icrc " : "",
1166                 rte);
1167
1168         rcv_hdrerr(rcd, rcd->ppd, packet);
1169 }
1170
1171 /*
1172  * The following functions are called by the interrupt handler. They are type
1173  * specific handlers for each packet type.
1174  */
1175 int process_receive_ib(struct hfi1_packet *packet)
1176 {
1177         trace_hfi1_rcvhdr(packet->rcd->ppd->dd,
1178                           packet->rcd->ctxt,
1179                           rhf_err_flags(packet->rhf),
1180                           RHF_RCV_TYPE_IB,
1181                           packet->hlen,
1182                           packet->tlen,
1183                           packet->updegr,
1184                           rhf_egr_index(packet->rhf));
1185
1186         if (unlikely(rhf_err_flags(packet->rhf))) {
1187                 handle_eflags(packet);
1188                 return RHF_RCV_CONTINUE;
1189         }
1190
1191         hfi1_ib_rcv(packet);
1192         return RHF_RCV_CONTINUE;
1193 }
1194
1195 int process_receive_bypass(struct hfi1_packet *packet)
1196 {
1197         if (unlikely(rhf_err_flags(packet->rhf)))
1198                 handle_eflags(packet);
1199
1200         dd_dev_err(packet->rcd->dd,
1201            "Bypass packets are not supported in normal operation. Dropping\n");
1202         return RHF_RCV_CONTINUE;
1203 }
1204
1205 int process_receive_error(struct hfi1_packet *packet)
1206 {
1207         handle_eflags(packet);
1208
1209         if (unlikely(rhf_err_flags(packet->rhf)))
1210                 dd_dev_err(packet->rcd->dd,
1211                            "Unhandled error packet received. Dropping.\n");
1212
1213         return RHF_RCV_CONTINUE;
1214 }
1215
1216 int kdeth_process_expected(struct hfi1_packet *packet)
1217 {
1218         if (unlikely(rhf_err_flags(packet->rhf)))
1219                 handle_eflags(packet);
1220
1221         dd_dev_err(packet->rcd->dd,
1222                    "Unhandled expected packet received. Dropping.\n");
1223         return RHF_RCV_CONTINUE;
1224 }
1225
1226 int kdeth_process_eager(struct hfi1_packet *packet)
1227 {
1228         if (unlikely(rhf_err_flags(packet->rhf)))
1229                 handle_eflags(packet);
1230
1231         dd_dev_err(packet->rcd->dd,
1232                    "Unhandled eager packet received. Dropping.\n");
1233         return RHF_RCV_CONTINUE;
1234 }
1235
1236 int process_receive_invalid(struct hfi1_packet *packet)
1237 {
1238         dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n",
1239                 rhf_rcv_type(packet->rhf));
1240         return RHF_RCV_CONTINUE;
1241 }