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                         unsigned long flags;
 306
 307                         rcu_read_lock();
 308                         qp = hfi1_lookup_qpn(ibp, qp_num);
 309                         if (!qp) {
 310                                 rcu_read_unlock();
 311                                 goto drop;
 312                         }
 313
 314                         /*
 315                          * Handle only RC QPs - for other QP types drop error
 316                          * packet.
 317                          */
 318                         spin_lock_irqsave(&qp->r_lock, flags);
 319
 320                         /* Check for valid receive state. */
 321                         if (!(ib_hfi1_state_ops[qp->state] &
 322                               HFI1_PROCESS_RECV_OK)) {
 323                                 ibp->n_pkt_drops++;
 324                         }
 325
 326                         switch (qp->ibqp.qp_type) {
 327                         case IB_QPT_RC:
 328                                 hfi1_rc_hdrerr(
 329                                         rcd,
 330                                         hdr,
 331                                         rcv_flags,
 332                                         qp);
 333                                 break;
 334                         default:
 335                                 /* For now don't handle any other QP types */
 336                                 break;
 337                         }
 338
 339                         spin_unlock_irqrestore(&qp->r_lock, flags);
 340                         rcu_read_unlock();
 341                 } /* Unicast QP */
 342         } /* Valid packet with TIDErr */
 343
 344         /* handle "RcvTypeErr" flags */
 345         switch (rte) {
 346         case RHF_RTE_ERROR_OP_CODE_ERR:
 347         {
 348                 u32 opcode;
 349                 void *ebuf = NULL;
 350                 __be32 *bth = NULL;
 351
 352                 if (rhf_use_egr_bfr(packet->rhf))
 353                         ebuf = packet->ebuf;
 354
 355                 if (ebuf == NULL)
 356                         goto drop; /* this should never happen */
 357
 358                 if (lnh == HFI1_LRH_BTH)
 359                         bth = (__be32 *)ebuf;
 360                 else if (lnh == HFI1_LRH_GRH)
 361                         bth = (__be32 *)((char *)ebuf + sizeof(struct ib_grh));
 362                 else
 363                         goto drop;
 364
 365                 opcode = be32_to_cpu(bth[0]) >> 24;
 366                 opcode &= 0xff;
 367
 368                 if (opcode == IB_OPCODE_CNP) {
 369                         /*
 370                          * Only in pre-B0 h/w is the CNP_OPCODE handled
 371                          * via this code path (errata 291394).
 372                          */
 373                         struct hfi1_qp *qp = NULL;
 374                         u32 lqpn, rqpn;
 375                         u16 rlid;
 376                         u8 svc_type, sl, sc5;
 377
 378                         sc5  = (be16_to_cpu(rhdr->lrh[0]) >> 12) & 0xf;
 379                         if (rhf_dc_info(packet->rhf))
 380                                 sc5 |= 0x10;
 381                         sl = ibp->sc_to_sl[sc5];
 382
 383                         lqpn = be32_to_cpu(bth[1]) & HFI1_QPN_MASK;
 384                         rcu_read_lock();
 385                         qp = hfi1_lookup_qpn(ibp, lqpn);
 386                         if (qp == NULL) {
 387                                 rcu_read_unlock();
 388                                 goto drop;
 389                         }
 390
 391                         switch (qp->ibqp.qp_type) {
 392                         case IB_QPT_UD:
 393                                 rlid = 0;
 394                                 rqpn = 0;
 395                                 svc_type = IB_CC_SVCTYPE_UD;
 396                                 break;
 397                         case IB_QPT_UC:
 398                                 rlid = be16_to_cpu(rhdr->lrh[3]);
 399                                 rqpn = qp->remote_qpn;
 400                                 svc_type = IB_CC_SVCTYPE_UC;
 401                                 break;
 402                         default:
 403                                 goto drop;
 404                         }
 405
 406                         process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
 407                         rcu_read_unlock();
 408                 }
 409
 410                 packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK;
 411                 break;
 412         }
 413         default:
 414                 break;
 415         }
 416
 417 drop:
 418         return;
 419 }
 420
 421 static inline void init_packet(struct hfi1_ctxtdata *rcd,
 422                               struct hfi1_packet *packet)
 423 {
 424
 425         packet->rsize = rcd->rcvhdrqentsize; /* words */
 426         packet->maxcnt = rcd->rcvhdrq_cnt * packet->rsize; /* words */
 427         packet->rcd = rcd;
 428         packet->updegr = 0;
 429         packet->etail = -1;
 430         packet->rhf_addr = get_rhf_addr(rcd);
 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, u32 bth1, struct ib_grh *grh)
 445 {
 446         struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
 447         u32 rqpn = 0;
 448         u16 rlid;
 449         u8 sc5, svc_type;
 450
 451         switch (qp->ibqp.qp_type) {
 452         case IB_QPT_SMI:
 453         case IB_QPT_GSI:
 454         case IB_QPT_UD:
 455                 rlid = be16_to_cpu(hdr->lrh[3]);
 456                 rqpn = be32_to_cpu(ohdr->u.ud.deth[1]) & HFI1_QPN_MASK;
 457                 svc_type = IB_CC_SVCTYPE_UD;
 458                 break;
 459         case IB_QPT_UC:
 460                 rlid = qp->remote_ah_attr.dlid;
 461                 rqpn = qp->remote_qpn;
 462                 svc_type = IB_CC_SVCTYPE_UC;
 463                 break;
 464         case IB_QPT_RC:
 465                 rlid = qp->remote_ah_attr.dlid;
 466                 rqpn = qp->remote_qpn;
 467                 svc_type = IB_CC_SVCTYPE_RC;
 468                 break;
 469         default:
 470                 return;
 471         }
 472
 473         sc5 = (be16_to_cpu(hdr->lrh[0]) >> 12) & 0xf;
 474         if (rhf_dc_info(rhf))
 475                 sc5 |= 0x10;
 476
 477         if (bth1 & HFI1_FECN_SMASK) {
 478                 u16 pkey = (u16)be32_to_cpu(ohdr->bth[0]);
 479                 u16 dlid = be16_to_cpu(hdr->lrh[1]);
 480
 481                 return_cnp(ibp, qp, rqpn, pkey, dlid, rlid, sc5, grh);
 482         }
 483
 484         if (bth1 & HFI1_BECN_SMASK) {
 485                 struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
 486                 u32 lqpn = bth1 & HFI1_QPN_MASK;
 487                 u8 sl = ibp->sc_to_sl[sc5];
 488
 489                 process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
 490         }
 491 }
 492
 493 struct ps_mdata {
 494         struct hfi1_ctxtdata *rcd;
 495         u32 rsize;
 496         u32 maxcnt;
 497         u32 ps_head;
 498         u32 ps_tail;
 499         u32 ps_seq;
 500 };
 501
 502 static inline void init_ps_mdata(struct ps_mdata *mdata,
 503                                  struct hfi1_packet *packet)
 504 {
 505         struct hfi1_ctxtdata *rcd = packet->rcd;
 506
 507         mdata->rcd = rcd;
 508         mdata->rsize = packet->rsize;
 509         mdata->maxcnt = packet->maxcnt;
 510         mdata->ps_head = packet->rhqoff;
 511
 512         if (HFI1_CAP_IS_KSET(DMA_RTAIL)) {
 513                 mdata->ps_tail = get_rcvhdrtail(rcd);
 514                 mdata->ps_seq = 0; /* not used with DMA_RTAIL */
 515         } else {
 516                 mdata->ps_tail = 0; /* used only with DMA_RTAIL*/
 517                 mdata->ps_seq = rcd->seq_cnt;
 518         }
 519 }
 520
 521 static inline int ps_done(struct ps_mdata *mdata, u64 rhf)
 522 {
 523         if (HFI1_CAP_IS_KSET(DMA_RTAIL))
 524                 return mdata->ps_head == mdata->ps_tail;
 525         return mdata->ps_seq != rhf_rcv_seq(rhf);
 526 }
 527
 528 static inline void update_ps_mdata(struct ps_mdata *mdata)
 529 {
 530         mdata->ps_head += mdata->rsize;
 531         if (mdata->ps_head >= mdata->maxcnt)
 532                 mdata->ps_head = 0;
 533         if (!HFI1_CAP_IS_KSET(DMA_RTAIL)) {
 534                 if (++mdata->ps_seq > 13)
 535                         mdata->ps_seq = 1;
 536         }
 537 }
 538
 539 /*
 540  * prescan_rxq - search through the receive queue looking for packets
 541  * containing Excplicit Congestion Notifications (FECNs, or BECNs).
 542  * When an ECN is found, process the Congestion Notification, and toggle
 543  * it off.
 544  */
 545 static void prescan_rxq(struct hfi1_packet *packet)
 546 {
 547         struct hfi1_ctxtdata *rcd = packet->rcd;
 548         struct ps_mdata mdata;
 549
 550         if (!prescan_receive_queue)
 551                 return;
 552
 553         init_ps_mdata(&mdata, packet);
 554
 555         while (1) {
 556                 struct hfi1_devdata *dd = rcd->dd;
 557                 struct hfi1_ibport *ibp = &rcd->ppd->ibport_data;
 558                 __le32 *rhf_addr = (__le32 *) rcd->rcvhdrq + mdata.ps_head +
 559                                          dd->rhf_offset;
 560                 struct hfi1_qp *qp;
 561                 struct hfi1_ib_header *hdr;
 562                 struct hfi1_other_headers *ohdr;
 563                 struct ib_grh *grh = NULL;
 564                 u64 rhf = rhf_to_cpu(rhf_addr);
 565                 u32 etype = rhf_rcv_type(rhf), qpn, bth1;
 566                 int is_ecn = 0;
 567                 u8 lnh;
 568
 569                 if (ps_done(&mdata, rhf))
 570                         break;
 571
 572                 if (etype != RHF_RCV_TYPE_IB)
 573                         goto next;
 574
 575                 hdr = (struct hfi1_ib_header *)
 576                         hfi1_get_msgheader(dd, rhf_addr);
 577                 lnh = be16_to_cpu(hdr->lrh[0]) & 3;
 578
 579                 if (lnh == HFI1_LRH_BTH)
 580                         ohdr = &hdr->u.oth;
 581                 else if (lnh == HFI1_LRH_GRH) {
 582                         ohdr = &hdr->u.l.oth;
 583                         grh = &hdr->u.l.grh;
 584                 } else
 585                         goto next; /* just in case */
 586
 587                 bth1 = be32_to_cpu(ohdr->bth[1]);
 588                 is_ecn = !!(bth1 & (HFI1_FECN_SMASK | HFI1_BECN_SMASK));
 589
 590                 if (!is_ecn)
 591                         goto next;
 592
 593                 qpn = bth1 & HFI1_QPN_MASK;
 594                 rcu_read_lock();
 595                 qp = hfi1_lookup_qpn(ibp, qpn);
 596
 597                 if (qp == NULL) {
 598                         rcu_read_unlock();
 599                         goto next;
 600                 }
 601
 602                 process_ecn(qp, hdr, ohdr, rhf, bth1, grh);
 603                 rcu_read_unlock();
 604
 605                 /* turn off BECN, FECN */
 606                 bth1 &= ~(HFI1_FECN_SMASK | HFI1_BECN_SMASK);
 607                 ohdr->bth[1] = cpu_to_be32(bth1);
 608 next:
 609                 update_ps_mdata(&mdata);
 610         }
 611 }
 612 #endif /* CONFIG_PRESCAN_RXQ */
 613
 614 static inline int process_rcv_packet(struct hfi1_packet *packet, int thread)
 615 {
 616         int ret = RCV_PKT_OK;
 617
 618         packet->hdr = hfi1_get_msgheader(packet->rcd->dd,
 619                                          packet->rhf_addr);
 620         packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
 621         packet->etype = rhf_rcv_type(packet->rhf);
 622         /* total length */
 623         packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */
 624         /* retrieve eager buffer details */
 625         packet->ebuf = NULL;
 626         if (rhf_use_egr_bfr(packet->rhf)) {
 627                 packet->etail = rhf_egr_index(packet->rhf);
 628                 packet->ebuf = get_egrbuf(packet->rcd, packet->rhf,
 629                                  &packet->updegr);
 630                 /*
 631                  * Prefetch the contents of the eager buffer.  It is
 632                  * OK to send a negative length to prefetch_range().
 633                  * The +2 is the size of the RHF.
 634                  */
 635                 prefetch_range(packet->ebuf,
 636                         packet->tlen - ((packet->rcd->rcvhdrqentsize -
 637                                   (rhf_hdrq_offset(packet->rhf)+2)) * 4));
 638         }
 639
 640         /*
 641          * Call a type specific handler for the packet. We
 642          * should be able to trust that etype won't be beyond
 643          * the range of valid indexes. If so something is really
 644          * wrong and we can probably just let things come
 645          * crashing down. There is no need to eat another
 646          * comparison in this performance critical code.
 647          */
 648         packet->rcd->dd->rhf_rcv_function_map[packet->etype](packet);
 649         packet->numpkt++;
 650
 651         /* Set up for the next packet */
 652         packet->rhqoff += packet->rsize;
 653         if (packet->rhqoff >= packet->maxcnt)
 654                 packet->rhqoff = 0;
 655
 656         if (unlikely((packet->numpkt & (MAX_PKT_RECV - 1)) == 0)) {
 657                 if (thread) {
 658                         cond_resched();
 659                 } else {
 660                         ret = RCV_PKT_LIMIT;
 661                         this_cpu_inc(*packet->rcd->dd->rcv_limit);
 662                 }
 663         }
 664
 665         packet->rhf_addr = (__le32 *) packet->rcd->rcvhdrq + packet->rhqoff +
 666                                       packet->rcd->dd->rhf_offset;
 667         packet->rhf = rhf_to_cpu(packet->rhf_addr);
 668
 669         return ret;
 670 }
 671
 672 static inline void process_rcv_update(int last, struct hfi1_packet *packet)
 673 {
 674         /*
 675          * Update head regs etc., every 16 packets, if not last pkt,
 676          * to help prevent rcvhdrq overflows, when many packets
 677          * are processed and queue is nearly full.
 678          * Don't request an interrupt for intermediate updates.
 679          */
 680         if (!last && !(packet->numpkt & 0xf)) {
 681                 update_usrhead(packet->rcd, packet->rhqoff, packet->updegr,
 682                                packet->etail, 0, 0);
 683                 packet->updegr = 0;
 684         }
 685         packet->rcv_flags = 0;
 686 }
 687
 688 static inline void finish_packet(struct hfi1_packet *packet)
 689 {
 690
 691         /*
 692          * Nothing we need to free for the packet.
 693          *
 694          * The only thing we need to do is a final update and call for an
 695          * interrupt
 696          */
 697         update_usrhead(packet->rcd, packet->rcd->head, packet->updegr,
 698                        packet->etail, rcv_intr_dynamic, packet->numpkt);
 699
 700 }
 701
 702 static inline void process_rcv_qp_work(struct hfi1_packet *packet)
 703 {
 704
 705         struct hfi1_ctxtdata *rcd;
 706         struct hfi1_qp *qp, *nqp;
 707
 708         rcd = packet->rcd;
 709         rcd->head = packet->rhqoff;
 710
 711         /*
 712          * Iterate over all QPs waiting to respond.
 713          * The list won't change since the IRQ is only run on one CPU.
 714          */
 715         list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) {
 716                 list_del_init(&qp->rspwait);
 717                 if (qp->r_flags & HFI1_R_RSP_DEFERED_ACK) {
 718                         qp->r_flags &= ~HFI1_R_RSP_DEFERED_ACK;
 719                         hfi1_send_rc_ack(rcd, qp, 0);
 720                 }
 721                 if (qp->r_flags & HFI1_R_RSP_SEND) {
 722                         unsigned long flags;
 723
 724                         qp->r_flags &= ~HFI1_R_RSP_SEND;
 725                         spin_lock_irqsave(&qp->s_lock, flags);
 726                         if (ib_hfi1_state_ops[qp->state] &
 727                                         HFI1_PROCESS_OR_FLUSH_SEND)
 728                                 hfi1_schedule_send(qp);
 729                         spin_unlock_irqrestore(&qp->s_lock, flags);
 730                 }
 731                 if (atomic_dec_and_test(&qp->refcount))
 732                         wake_up(&qp->wait);
 733         }
 734 }
 735
 736 /*
 737  * Handle receive interrupts when using the no dma rtail option.
 738  */
 739 int handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd, int thread)
 740 {
 741         u32 seq;
 742         int last = RCV_PKT_OK;
 743         struct hfi1_packet packet;
 744
 745         init_packet(rcd, &packet);
 746         seq = rhf_rcv_seq(packet.rhf);
 747         if (seq != rcd->seq_cnt) {
 748                 last = RCV_PKT_DONE;
 749                 goto bail;
 750         }
 751
 752         prescan_rxq(&packet);
 753
 754         while (last == RCV_PKT_OK) {
 755                 last = process_rcv_packet(&packet, thread);
 756                 seq = rhf_rcv_seq(packet.rhf);
 757                 if (++rcd->seq_cnt > 13)
 758                         rcd->seq_cnt = 1;
 759                 if (seq != rcd->seq_cnt)
 760                         last = RCV_PKT_DONE;
 761                 process_rcv_update(last, &packet);
 762         }
 763         process_rcv_qp_work(&packet);
 764 bail:
 765         finish_packet(&packet);
 766         return last;
 767 }
 768
 769 int handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd, int thread)
 770 {
 771         u32 hdrqtail;
 772         int last = RCV_PKT_OK;
 773         struct hfi1_packet packet;
 774
 775         init_packet(rcd, &packet);
 776         hdrqtail = get_rcvhdrtail(rcd);
 777         if (packet.rhqoff == hdrqtail) {
 778                 last = RCV_PKT_DONE;
 779                 goto bail;
 780         }
 781         smp_rmb();  /* prevent speculative reads of dma'ed hdrq */
 782
 783         prescan_rxq(&packet);
 784
 785         while (last == RCV_PKT_OK) {
 786                 last = process_rcv_packet(&packet, thread);
 787                 hdrqtail = get_rcvhdrtail(rcd);
 788                 if (packet.rhqoff == hdrqtail)
 789                         last = RCV_PKT_DONE;
 790                 process_rcv_update(last, &packet);
 791         }
 792         process_rcv_qp_work(&packet);
 793 bail:
 794         finish_packet(&packet);
 795         return last;
 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 int handle_receive_interrupt(struct hfi1_ctxtdata *rcd, int thread)
 824 {
 825         struct hfi1_devdata *dd = rcd->dd;
 826         u32 hdrqtail;
 827         int last = RCV_PKT_OK, needset = 1;
 828         struct hfi1_packet packet;
 829
 830         init_packet(rcd, &packet);
 831
 832         if (!HFI1_CAP_IS_KSET(DMA_RTAIL)) {
 833                 u32 seq = rhf_rcv_seq(packet.rhf);
 834
 835                 if (seq != rcd->seq_cnt) {
 836                         last = RCV_PKT_DONE;
 837                         goto bail;
 838                 }
 839                 hdrqtail = 0;
 840         } else {
 841                 hdrqtail = get_rcvhdrtail(rcd);
 842                 if (packet.rhqoff == hdrqtail) {
 843                         last = RCV_PKT_DONE;
 844                         goto bail;
 845                 }
 846                 smp_rmb();  /* prevent speculative reads of dma'ed hdrq */
 847         }
 848
 849         prescan_rxq(&packet);
 850
 851         while (last == RCV_PKT_OK) {
 852
 853                 if (unlikely(dd->do_drop && atomic_xchg(&dd->drop_packet,
 854                         DROP_PACKET_OFF) == DROP_PACKET_ON)) {
 855                         dd->do_drop = 0;
 856
 857                         /* On to the next packet */
 858                         packet.rhqoff += packet.rsize;
 859                         packet.rhf_addr = (__le32 *) rcd->rcvhdrq +
 860                                           packet.rhqoff +
 861                                           dd->rhf_offset;
 862                         packet.rhf = rhf_to_cpu(packet.rhf_addr);
 863
 864                 } else {
 865                         last = process_rcv_packet(&packet, thread);
 866                 }
 867
 868                 if (!HFI1_CAP_IS_KSET(DMA_RTAIL)) {
 869                         u32 seq = rhf_rcv_seq(packet.rhf);
 870
 871                         if (++rcd->seq_cnt > 13)
 872                                 rcd->seq_cnt = 1;
 873                         if (seq != rcd->seq_cnt)
 874                                 last = RCV_PKT_DONE;
 875                         if (needset) {
 876                                 dd_dev_info(dd,
 877                                         "Switching to NO_DMA_RTAIL\n");
 878                                 set_all_nodma_rtail(dd);
 879                                 needset = 0;
 880                         }
 881                 } else {
 882                         if (packet.rhqoff == hdrqtail)
 883                                 last = RCV_PKT_DONE;
 884                         if (needset) {
 885                                 dd_dev_info(dd,
 886                                             "Switching to DMA_RTAIL\n");
 887                                 set_all_dma_rtail(dd);
 888                                 needset = 0;
 889                         }
 890                 }
 891
 892                 process_rcv_update(last, &packet);
 893         }
 894
 895         process_rcv_qp_work(&packet);
 896
 897 bail:
 898         /*
 899          * Always write head at end, and setup rcv interrupt, even
 900          * if no packets were processed.
 901          */
 902         finish_packet(&packet);
 903         return last;
 904 }
 905
 906 /*
 907  * Convert a given MTU size to the on-wire MAD packet enumeration.
 908  * Return -1 if the size is invalid.
 909  */
 910 int mtu_to_enum(u32 mtu, int default_if_bad)
 911 {
 912         switch (mtu) {
 913         case     0: return OPA_MTU_0;
 914         case   256: return OPA_MTU_256;
 915         case   512: return OPA_MTU_512;
 916         case  1024: return OPA_MTU_1024;
 917         case  2048: return OPA_MTU_2048;
 918         case  4096: return OPA_MTU_4096;
 919         case  8192: return OPA_MTU_8192;
 920         case 10240: return OPA_MTU_10240;
 921         }
 922         return default_if_bad;
 923 }
 924
 925 u16 enum_to_mtu(int mtu)
 926 {
 927         switch (mtu) {
 928         case OPA_MTU_0:     return 0;
 929         case OPA_MTU_256:   return 256;
 930         case OPA_MTU_512:   return 512;
 931         case OPA_MTU_1024:  return 1024;
 932         case OPA_MTU_2048:  return 2048;
 933         case OPA_MTU_4096:  return 4096;
 934         case OPA_MTU_8192:  return 8192;
 935         case OPA_MTU_10240: return 10240;
 936         default: return 0xffff;
 937         }
 938 }
 939
 940 /*
 941  * set_mtu - set the MTU
 942  * @ppd: the per port data
 943  *
 944  * We can handle "any" incoming size, the issue here is whether we
 945  * need to restrict our outgoing size.  We do not deal with what happens
 946  * to programs that are already running when the size changes.
 947  */
 948 int set_mtu(struct hfi1_pportdata *ppd)
 949 {
 950         struct hfi1_devdata *dd = ppd->dd;
 951         int i, drain, ret = 0, is_up = 0;
 952
 953         ppd->ibmtu = 0;
 954         for (i = 0; i < ppd->vls_supported; i++)
 955                 if (ppd->ibmtu < dd->vld[i].mtu)
 956                         ppd->ibmtu = dd->vld[i].mtu;
 957         ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd);
 958
 959         mutex_lock(&ppd->hls_lock);
 960         if (ppd->host_link_state == HLS_UP_INIT
 961                         || ppd->host_link_state == HLS_UP_ARMED
 962                         || ppd->host_link_state == HLS_UP_ACTIVE)
 963                 is_up = 1;
 964
 965         drain = !is_ax(dd) && is_up;
 966
 967         if (drain)
 968                 /*
 969                  * MTU is specified per-VL. To ensure that no packet gets
 970                  * stuck (due, e.g., to the MTU for the packet's VL being
 971                  * reduced), empty the per-VL FIFOs before adjusting MTU.
 972                  */
 973                 ret = stop_drain_data_vls(dd);
 974
 975         if (ret) {
 976                 dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n",
 977                            __func__);
 978                 goto err;
 979         }
 980
 981         hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0);
 982
 983         if (drain)
 984                 open_fill_data_vls(dd); /* reopen all VLs */
 985
 986 err:
 987         mutex_unlock(&ppd->hls_lock);
 988
 989         return ret;
 990 }
 991
 992 int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc)
 993 {
 994         struct hfi1_devdata *dd = ppd->dd;
 995
 996         ppd->lid = lid;
 997         ppd->lmc = lmc;
 998         hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0);
 999
1000         dd_dev_info(dd, "IB%u:%u got a lid: 0x%x\n", dd->unit, ppd->port, lid);
1001
1002         return 0;
1003 }
1004
1005 /*
1006  * Following deal with the "obviously simple" task of overriding the state
1007  * of the LEDs, which normally indicate link physical and logical status.
1008  * The complications arise in dealing with different hardware mappings
1009  * and the board-dependent routine being called from interrupts.
1010  * and then there's the requirement to _flash_ them.
1011  */
1012 #define LED_OVER_FREQ_SHIFT 8
1013 #define LED_OVER_FREQ_MASK (0xFF<<LED_OVER_FREQ_SHIFT)
1014 /* Below is "non-zero" to force override, but both actual LEDs are off */
1015 #define LED_OVER_BOTH_OFF (8)
1016
1017 static void run_led_override(unsigned long opaque)
1018 {
1019         struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)opaque;
1020         struct hfi1_devdata *dd = ppd->dd;
1021         int timeoff;
1022         int ph_idx;
1023
1024         if (!(dd->flags & HFI1_INITTED))
1025                 return;
1026
1027         ph_idx = ppd->led_override_phase++ & 1;
1028         ppd->led_override = ppd->led_override_vals[ph_idx];
1029         timeoff = ppd->led_override_timeoff;
1030
1031         /*
1032          * don't re-fire the timer if user asked for it to be off; we let
1033          * it fire one more time after they turn it off to simplify
1034          */
1035         if (ppd->led_override_vals[0] || ppd->led_override_vals[1])
1036                 mod_timer(&ppd->led_override_timer, jiffies + timeoff);
1037 }
1038
1039 void hfi1_set_led_override(struct hfi1_pportdata *ppd, unsigned int val)
1040 {
1041         struct hfi1_devdata *dd = ppd->dd;
1042         int timeoff, freq;
1043
1044         if (!(dd->flags & HFI1_INITTED))
1045                 return;
1046
1047         /* First check if we are blinking. If not, use 1HZ polling */
1048         timeoff = HZ;
1049         freq = (val & LED_OVER_FREQ_MASK) >> LED_OVER_FREQ_SHIFT;
1050
1051         if (freq) {
1052                 /* For blink, set each phase from one nybble of val */
1053                 ppd->led_override_vals[0] = val & 0xF;
1054                 ppd->led_override_vals[1] = (val >> 4) & 0xF;
1055                 timeoff = (HZ << 4)/freq;
1056         } else {
1057                 /* Non-blink set both phases the same. */
1058                 ppd->led_override_vals[0] = val & 0xF;
1059                 ppd->led_override_vals[1] = val & 0xF;
1060         }
1061         ppd->led_override_timeoff = timeoff;
1062
1063         /*
1064          * If the timer has not already been started, do so. Use a "quick"
1065          * timeout so the function will be called soon, to look at our request.
1066          */
1067         if (atomic_inc_return(&ppd->led_override_timer_active) == 1) {
1068                 /* Need to start timer */
1069                 setup_timer(&ppd->led_override_timer, run_led_override,
1070                                 (unsigned long)ppd);
1071
1072                 ppd->led_override_timer.expires = jiffies + 1;
1073                 add_timer(&ppd->led_override_timer);
1074         } else {
1075                 if (ppd->led_override_vals[0] || ppd->led_override_vals[1])
1076                         mod_timer(&ppd->led_override_timer, jiffies + 1);
1077                 atomic_dec(&ppd->led_override_timer_active);
1078         }
1079 }
1080
1081 /**
1082  * hfi1_reset_device - reset the chip if possible
1083  * @unit: the device to reset
1084  *
1085  * Whether or not reset is successful, we attempt to re-initialize the chip
1086  * (that is, much like a driver unload/reload).  We clear the INITTED flag
1087  * so that the various entry points will fail until we reinitialize.  For
1088  * now, we only allow this if no user contexts are open that use chip resources
1089  */
1090 int hfi1_reset_device(int unit)
1091 {
1092         int ret, i;
1093         struct hfi1_devdata *dd = hfi1_lookup(unit);
1094         struct hfi1_pportdata *ppd;
1095         unsigned long flags;
1096         int pidx;
1097
1098         if (!dd) {
1099                 ret = -ENODEV;
1100                 goto bail;
1101         }
1102
1103         dd_dev_info(dd, "Reset on unit %u requested\n", unit);
1104
1105         if (!dd->kregbase || !(dd->flags & HFI1_PRESENT)) {
1106                 dd_dev_info(dd,
1107                         "Invalid unit number %u or not initialized or not present\n",
1108                         unit);
1109                 ret = -ENXIO;
1110                 goto bail;
1111         }
1112
1113         spin_lock_irqsave(&dd->uctxt_lock, flags);
1114         if (dd->rcd)
1115                 for (i = dd->first_user_ctxt; i < dd->num_rcv_contexts; i++) {
1116                         if (!dd->rcd[i] || !dd->rcd[i]->cnt)
1117                                 continue;
1118                         spin_unlock_irqrestore(&dd->uctxt_lock, flags);
1119                         ret = -EBUSY;
1120                         goto bail;
1121                 }
1122         spin_unlock_irqrestore(&dd->uctxt_lock, flags);
1123
1124         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
1125                 ppd = dd->pport + pidx;
1126                 if (atomic_read(&ppd->led_override_timer_active)) {
1127                         /* Need to stop LED timer, _then_ shut off LEDs */
1128                         del_timer_sync(&ppd->led_override_timer);
1129                         atomic_set(&ppd->led_override_timer_active, 0);
1130                 }
1131
1132                 /* Shut off LEDs after we are sure timer is not running */
1133                 ppd->led_override = LED_OVER_BOTH_OFF;
1134         }
1135         if (dd->flags & HFI1_HAS_SEND_DMA)
1136                 sdma_exit(dd);
1137
1138         hfi1_reset_cpu_counters(dd);
1139
1140         ret = hfi1_init(dd, 1);
1141
1142         if (ret)
1143                 dd_dev_err(dd,
1144                         "Reinitialize unit %u after reset failed with %d\n",
1145                         unit, ret);
1146         else
1147                 dd_dev_info(dd, "Reinitialized unit %u after resetting\n",
1148                         unit);
1149
1150 bail:
1151         return ret;
1152 }
1153
1154 void handle_eflags(struct hfi1_packet *packet)
1155 {
1156         struct hfi1_ctxtdata *rcd = packet->rcd;
1157         u32 rte = rhf_rcv_type_err(packet->rhf);
1158
1159         rcv_hdrerr(rcd, rcd->ppd, packet);
1160         if (rhf_err_flags(packet->rhf))
1161                 dd_dev_err(rcd->dd,
1162                            "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n",
1163                            rcd->ctxt, packet->rhf,
1164                            packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "",
1165                            packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "",
1166                            packet->rhf & RHF_DC_ERR ? "dc " : "",
1167                            packet->rhf & RHF_TID_ERR ? "tid " : "",
1168                            packet->rhf & RHF_LEN_ERR ? "len " : "",
1169                            packet->rhf & RHF_ECC_ERR ? "ecc " : "",
1170                            packet->rhf & RHF_VCRC_ERR ? "vcrc " : "",
1171                            packet->rhf & RHF_ICRC_ERR ? "icrc " : "",
1172                            rte);
1173 }
1174
1175 /*
1176  * The following functions are called by the interrupt handler. They are type
1177  * specific handlers for each packet type.
1178  */
1179 int process_receive_ib(struct hfi1_packet *packet)
1180 {
1181         trace_hfi1_rcvhdr(packet->rcd->ppd->dd,
1182                           packet->rcd->ctxt,
1183                           rhf_err_flags(packet->rhf),
1184                           RHF_RCV_TYPE_IB,
1185                           packet->hlen,
1186                           packet->tlen,
1187                           packet->updegr,
1188                           rhf_egr_index(packet->rhf));
1189
1190         if (unlikely(rhf_err_flags(packet->rhf))) {
1191                 handle_eflags(packet);
1192                 return RHF_RCV_CONTINUE;
1193         }
1194
1195         hfi1_ib_rcv(packet);
1196         return RHF_RCV_CONTINUE;
1197 }
1198
1199 int process_receive_bypass(struct hfi1_packet *packet)
1200 {
1201         if (unlikely(rhf_err_flags(packet->rhf)))
1202                 handle_eflags(packet);
1203
1204         dd_dev_err(packet->rcd->dd,
1205            "Bypass packets are not supported in normal operation. Dropping\n");
1206         return RHF_RCV_CONTINUE;
1207 }
1208
1209 int process_receive_error(struct hfi1_packet *packet)
1210 {
1211         handle_eflags(packet);
1212
1213         if (unlikely(rhf_err_flags(packet->rhf)))
1214                 dd_dev_err(packet->rcd->dd,
1215                            "Unhandled error packet received. Dropping.\n");
1216
1217         return RHF_RCV_CONTINUE;
1218 }
1219
1220 int kdeth_process_expected(struct hfi1_packet *packet)
1221 {
1222         if (unlikely(rhf_err_flags(packet->rhf)))
1223                 handle_eflags(packet);
1224
1225         dd_dev_err(packet->rcd->dd,
1226                    "Unhandled expected packet received. Dropping.\n");
1227         return RHF_RCV_CONTINUE;
1228 }
1229
1230 int kdeth_process_eager(struct hfi1_packet *packet)
1231 {
1232         if (unlikely(rhf_err_flags(packet->rhf)))
1233                 handle_eflags(packet);
1234
1235         dd_dev_err(packet->rcd->dd,
1236                    "Unhandled eager packet received. Dropping.\n");
1237         return RHF_RCV_CONTINUE;
1238 }
1239
1240 int process_receive_invalid(struct hfi1_packet *packet)
1241 {
1242         dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n",
1243                 rhf_rcv_type(packet->rhf));
1244         return RHF_RCV_CONTINUE;
1245 }