drivers/infiniband/hw/hfi1/driver.c

   1 /*
   2  * Copyright(c) 2015-2017 Intel Corporation.
   3  *
   4  * This file is provided under a dual BSD/GPLv2 license.  When using or
   5  * redistributing this file, you may do so under either license.
   6  *
   7  * GPL LICENSE SUMMARY
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * BSD LICENSE
  19  *
  20  * Redistribution and use in source and binary forms, with or without
  21  * modification, are permitted provided that the following conditions
  22  * are met:
  23  *
  24  *  - Redistributions of source code must retain the above copyright
  25  *    notice, this list of conditions and the following disclaimer.
  26  *  - Redistributions in binary form must reproduce the above copyright
  27  *    notice, this list of conditions and the following disclaimer in
  28  *    the documentation and/or other materials provided with the
  29  *    distribution.
  30  *  - Neither the name of Intel Corporation nor the names of its
  31  *    contributors may be used to endorse or promote products derived
  32  *    from this software without specific prior written permission.
  33  *
  34  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  35  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  36  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  37  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  38  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  39  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  40  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  41  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  42  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  43  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  44  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  45  *
  46  */
  47
  48 #include <linux/spinlock.h>
  49 #include <linux/pci.h>
  50 #include <linux/io.h>
  51 #include <linux/delay.h>
  52 #include <linux/netdevice.h>
  53 #include <linux/vmalloc.h>
  54 #include <linux/module.h>
  55 #include <linux/prefetch.h>
  56 #include <rdma/ib_verbs.h>
  57
  58 #include "hfi.h"
  59 #include "trace.h"
  60 #include "qp.h"
  61 #include "sdma.h"
  62 #include "debugfs.h"
  63 #include "vnic.h"
  64
  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 " __stringify(
  81                  HFI1_DEFAULT_MAX_MTU));
  82
  83 unsigned int hfi1_cu = 1;
  84 module_param_named(cu, hfi1_cu, uint, S_IRUGO);
  85 MODULE_PARM_DESC(cu, "Credit return units");
  86
  87 unsigned long hfi1_cap_mask = HFI1_CAP_MASK_DEFAULT;
  88 static int hfi1_caps_set(const char *val, const struct kernel_param *kp);
  89 static int hfi1_caps_get(char *buffer, const struct kernel_param *kp);
  90 static const struct kernel_param_ops cap_ops = {
  91         .set = hfi1_caps_set,
  92         .get = hfi1_caps_get
  93 };
  94 module_param_cb(cap_mask, &cap_ops, &hfi1_cap_mask, S_IWUSR | S_IRUGO);
  95 MODULE_PARM_DESC(cap_mask, "Bit mask of enabled/disabled HW features");
  96
  97 MODULE_LICENSE("Dual BSD/GPL");
  98 MODULE_DESCRIPTION("Intel Omni-Path Architecture driver");
  99
 100 /*
 101  * MAX_PKT_RCV is the max # if packets processed per receive interrupt.
 102  */
 103 #define MAX_PKT_RECV 64
 104 /*
 105  * MAX_PKT_THREAD_RCV is the max # of packets processed before
 106  * the qp_wait_list queue is flushed.
 107  */
 108 #define MAX_PKT_RECV_THREAD (MAX_PKT_RECV * 4)
 109 #define EGR_HEAD_UPDATE_THRESHOLD 16
 110
 111 struct hfi1_ib_stats hfi1_stats;
 112
 113 static int hfi1_caps_set(const char *val, const struct kernel_param *kp)
 114 {
 115         int ret = 0;
 116         unsigned long *cap_mask_ptr = (unsigned long *)kp->arg,
 117                 cap_mask = *cap_mask_ptr, value, diff,
 118                 write_mask = ((HFI1_CAP_WRITABLE_MASK << HFI1_CAP_USER_SHIFT) |
 119                               HFI1_CAP_WRITABLE_MASK);
 120
 121         ret = kstrtoul(val, 0, &value);
 122         if (ret) {
 123                 pr_warn("Invalid module parameter value for 'cap_mask'\n");
 124                 goto done;
 125         }
 126         /* Get the changed bits (except the locked bit) */
 127         diff = value ^ (cap_mask & ~HFI1_CAP_LOCKED_SMASK);
 128
 129         /* Remove any bits that are not allowed to change after driver load */
 130         if (HFI1_CAP_LOCKED() && (diff & ~write_mask)) {
 131                 pr_warn("Ignoring non-writable capability bits %#lx\n",
 132                         diff & ~write_mask);
 133                 diff &= write_mask;
 134         }
 135
 136         /* Mask off any reserved bits */
 137         diff &= ~HFI1_CAP_RESERVED_MASK;
 138         /* Clear any previously set and changing bits */
 139         cap_mask &= ~diff;
 140         /* Update the bits with the new capability */
 141         cap_mask |= (value & diff);
 142         /* Check for any kernel/user restrictions */
 143         diff = (cap_mask & (HFI1_CAP_MUST_HAVE_KERN << HFI1_CAP_USER_SHIFT)) ^
 144                 ((cap_mask & HFI1_CAP_MUST_HAVE_KERN) << HFI1_CAP_USER_SHIFT);
 145         cap_mask &= ~diff;
 146         /* Set the bitmask to the final set */
 147         *cap_mask_ptr = cap_mask;
 148 done:
 149         return ret;
 150 }
 151
 152 static int hfi1_caps_get(char *buffer, const struct kernel_param *kp)
 153 {
 154         unsigned long cap_mask = *(unsigned long *)kp->arg;
 155
 156         cap_mask &= ~HFI1_CAP_LOCKED_SMASK;
 157         cap_mask |= ((cap_mask & HFI1_CAP_K2U) << HFI1_CAP_USER_SHIFT);
 158
 159         return scnprintf(buffer, PAGE_SIZE, "0x%lx", cap_mask);
 160 }
 161
 162 const char *get_unit_name(int unit)
 163 {
 164         static char iname[16];
 165
 166         snprintf(iname, sizeof(iname), DRIVER_NAME "_%u", unit);
 167         return iname;
 168 }
 169
 170 const char *get_card_name(struct rvt_dev_info *rdi)
 171 {
 172         struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi);
 173         struct hfi1_devdata *dd = container_of(ibdev,
 174                                                struct hfi1_devdata, verbs_dev);
 175         return get_unit_name(dd->unit);
 176 }
 177
 178 struct pci_dev *get_pci_dev(struct rvt_dev_info *rdi)
 179 {
 180         struct hfi1_ibdev *ibdev = container_of(rdi, struct hfi1_ibdev, rdi);
 181         struct hfi1_devdata *dd = container_of(ibdev,
 182                                                struct hfi1_devdata, verbs_dev);
 183         return dd->pcidev;
 184 }
 185
 186 /*
 187  * Return count of units with at least one port ACTIVE.
 188  */
 189 int hfi1_count_active_units(void)
 190 {
 191         struct hfi1_devdata *dd;
 192         struct hfi1_pportdata *ppd;
 193         unsigned long flags;
 194         int pidx, nunits_active = 0;
 195
 196         spin_lock_irqsave(&hfi1_devs_lock, flags);
 197         list_for_each_entry(dd, &hfi1_dev_list, list) {
 198                 if (!(dd->flags & HFI1_PRESENT) || !dd->kregbase1)
 199                         continue;
 200                 for (pidx = 0; pidx < dd->num_pports; ++pidx) {
 201                         ppd = dd->pport + pidx;
 202                         if (ppd->lid && ppd->linkup) {
 203                                 nunits_active++;
 204                                 break;
 205                         }
 206                 }
 207         }
 208         spin_unlock_irqrestore(&hfi1_devs_lock, flags);
 209         return nunits_active;
 210 }
 211
 212 /*
 213  * Get address of eager buffer from it's index (allocated in chunks, not
 214  * contiguous).
 215  */
 216 static inline void *get_egrbuf(const struct hfi1_ctxtdata *rcd, u64 rhf,
 217                                u8 *update)
 218 {
 219         u32 idx = rhf_egr_index(rhf), offset = rhf_egr_buf_offset(rhf);
 220
 221         *update |= !(idx & (rcd->egrbufs.threshold - 1)) && !offset;
 222         return (void *)(((u64)(rcd->egrbufs.rcvtids[idx].addr)) +
 223                         (offset * RCV_BUF_BLOCK_SIZE));
 224 }
 225
 226 static inline void *hfi1_get_header(struct hfi1_devdata *dd,
 227                                     __le32 *rhf_addr)
 228 {
 229         u32 offset = rhf_hdrq_offset(rhf_to_cpu(rhf_addr));
 230
 231         return (void *)(rhf_addr - dd->rhf_offset + offset);
 232 }
 233
 234 static inline struct ib_header *hfi1_get_msgheader(struct hfi1_devdata *dd,
 235                                                    __le32 *rhf_addr)
 236 {
 237         return (struct ib_header *)hfi1_get_header(dd, rhf_addr);
 238 }
 239
 240 static inline struct hfi1_16b_header
 241                 *hfi1_get_16B_header(struct hfi1_devdata *dd,
 242                                      __le32 *rhf_addr)
 243 {
 244         return (struct hfi1_16b_header *)hfi1_get_header(dd, rhf_addr);
 245 }
 246
 247 /*
 248  * Validate and encode the a given RcvArray Buffer size.
 249  * The function will check whether the given size falls within
 250  * allowed size ranges for the respective type and, optionally,
 251  * return the proper encoding.
 252  */
 253 int hfi1_rcvbuf_validate(u32 size, u8 type, u16 *encoded)
 254 {
 255         if (unlikely(!PAGE_ALIGNED(size)))
 256                 return 0;
 257         if (unlikely(size < MIN_EAGER_BUFFER))
 258                 return 0;
 259         if (size >
 260             (type == PT_EAGER ? MAX_EAGER_BUFFER : MAX_EXPECTED_BUFFER))
 261                 return 0;
 262         if (encoded)
 263                 *encoded = ilog2(size / PAGE_SIZE) + 1;
 264         return 1;
 265 }
 266
 267 static void rcv_hdrerr(struct hfi1_ctxtdata *rcd, struct hfi1_pportdata *ppd,
 268                        struct hfi1_packet *packet)
 269 {
 270         struct ib_header *rhdr = packet->hdr;
 271         u32 rte = rhf_rcv_type_err(packet->rhf);
 272         u32 mlid_base;
 273         struct hfi1_ibport *ibp = rcd_to_iport(rcd);
 274         struct hfi1_devdata *dd = ppd->dd;
 275         struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
 276
 277         if (packet->rhf & (RHF_VCRC_ERR | RHF_ICRC_ERR))
 278                 return;
 279
 280         if (packet->etype == RHF_RCV_TYPE_BYPASS) {
 281                 goto drop;
 282         } else {
 283                 u8 lnh = ib_get_lnh(rhdr);
 284
 285                 mlid_base = be16_to_cpu(IB_MULTICAST_LID_BASE);
 286                 if (lnh == HFI1_LRH_BTH) {
 287                         packet->ohdr = &rhdr->u.oth;
 288                 } else if (lnh == HFI1_LRH_GRH) {
 289                         packet->ohdr = &rhdr->u.l.oth;
 290                         packet->grh = &rhdr->u.l.grh;
 291                 } else {
 292                         goto drop;
 293                 }
 294         }
 295
 296         if (packet->rhf & RHF_TID_ERR) {
 297                 /* For TIDERR and RC QPs preemptively schedule a NAK */
 298                 u32 tlen = rhf_pkt_len(packet->rhf); /* in bytes */
 299                 u32 dlid = ib_get_dlid(rhdr);
 300                 u32 qp_num;
 301
 302                 /* Sanity check packet */
 303                 if (tlen < 24)
 304                         goto drop;
 305
 306                 /* Check for GRH */
 307                 if (packet->grh) {
 308                         u32 vtf;
 309                         struct ib_grh *grh = packet->grh;
 310
 311                         if (grh->next_hdr != IB_GRH_NEXT_HDR)
 312                                 goto drop;
 313                         vtf = be32_to_cpu(grh->version_tclass_flow);
 314                         if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
 315                                 goto drop;
 316                 }
 317
 318                 /* Get the destination QP number. */
 319                 qp_num = ib_bth_get_qpn(packet->ohdr);
 320                 if (dlid < mlid_base) {
 321                         struct rvt_qp *qp;
 322                         unsigned long flags;
 323
 324                         rcu_read_lock();
 325                         qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num);
 326                         if (!qp) {
 327                                 rcu_read_unlock();
 328                                 goto drop;
 329                         }
 330
 331                         /*
 332                          * Handle only RC QPs - for other QP types drop error
 333                          * packet.
 334                          */
 335                         spin_lock_irqsave(&qp->r_lock, flags);
 336
 337                         /* Check for valid receive state. */
 338                         if (!(ib_rvt_state_ops[qp->state] &
 339                               RVT_PROCESS_RECV_OK)) {
 340                                 ibp->rvp.n_pkt_drops++;
 341                         }
 342
 343                         switch (qp->ibqp.qp_type) {
 344                         case IB_QPT_RC:
 345                                 hfi1_rc_hdrerr(rcd, packet, qp);
 346                                 break;
 347                         default:
 348                                 /* For now don't handle any other QP types */
 349                                 break;
 350                         }
 351
 352                         spin_unlock_irqrestore(&qp->r_lock, flags);
 353                         rcu_read_unlock();
 354                 } /* Unicast QP */
 355         } /* Valid packet with TIDErr */
 356
 357         /* handle "RcvTypeErr" flags */
 358         switch (rte) {
 359         case RHF_RTE_ERROR_OP_CODE_ERR:
 360         {
 361                 void *ebuf = NULL;
 362                 u8 opcode;
 363
 364                 if (rhf_use_egr_bfr(packet->rhf))
 365                         ebuf = packet->ebuf;
 366
 367                 if (!ebuf)
 368                         goto drop; /* this should never happen */
 369
 370                 opcode = ib_bth_get_opcode(packet->ohdr);
 371                 if (opcode == IB_OPCODE_CNP) {
 372                         /*
 373                          * Only in pre-B0 h/w is the CNP_OPCODE handled
 374                          * via this code path.
 375                          */
 376                         struct rvt_qp *qp = NULL;
 377                         u32 lqpn, rqpn;
 378                         u16 rlid;
 379                         u8 svc_type, sl, sc5;
 380
 381                         sc5 = hfi1_9B_get_sc5(rhdr, packet->rhf);
 382                         sl = ibp->sc_to_sl[sc5];
 383
 384                         lqpn = ib_bth_get_qpn(packet->ohdr);
 385                         rcu_read_lock();
 386                         qp = rvt_lookup_qpn(rdi, &ibp->rvp, lqpn);
 387                         if (!qp) {
 388                                 rcu_read_unlock();
 389                                 goto drop;
 390                         }
 391
 392                         switch (qp->ibqp.qp_type) {
 393                         case IB_QPT_UD:
 394                                 rlid = 0;
 395                                 rqpn = 0;
 396                                 svc_type = IB_CC_SVCTYPE_UD;
 397                                 break;
 398                         case IB_QPT_UC:
 399                                 rlid = ib_get_slid(rhdr);
 400                                 rqpn = qp->remote_qpn;
 401                                 svc_type = IB_CC_SVCTYPE_UC;
 402                                 break;
 403                         default:
 404                                 goto drop;
 405                         }
 406
 407                         process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
 408                         rcu_read_unlock();
 409                 }
 410
 411                 packet->rhf &= ~RHF_RCV_TYPE_ERR_SMASK;
 412                 break;
 413         }
 414         default:
 415                 break;
 416         }
 417
 418 drop:
 419         return;
 420 }
 421
 422 static inline void init_packet(struct hfi1_ctxtdata *rcd,
 423                                struct hfi1_packet *packet)
 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 }
 435
 436 void hfi1_process_ecn_slowpath(struct rvt_qp *qp, struct hfi1_packet *pkt,
 437                                bool do_cnp)
 438 {
 439         struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num);
 440         struct hfi1_pportdata *ppd = ppd_from_ibp(ibp);
 441         struct ib_other_headers *ohdr = pkt->ohdr;
 442         struct ib_grh *grh = pkt->grh;
 443         u32 rqpn = 0, bth1;
 444         u16 pkey;
 445         u32 rlid, slid, dlid = 0;
 446         u8 hdr_type, sc, svc_type;
 447         bool is_mcast = false;
 448
 449         /* can be called from prescan */
 450         if (pkt->etype == RHF_RCV_TYPE_BYPASS) {
 451                 is_mcast = hfi1_is_16B_mcast(dlid);
 452                 pkey = hfi1_16B_get_pkey(pkt->hdr);
 453                 sc = hfi1_16B_get_sc(pkt->hdr);
 454                 dlid = hfi1_16B_get_dlid(pkt->hdr);
 455                 slid = hfi1_16B_get_slid(pkt->hdr);
 456                 hdr_type = HFI1_PKT_TYPE_16B;
 457         } else {
 458                 is_mcast = (dlid > be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
 459                            (dlid != be16_to_cpu(IB_LID_PERMISSIVE));
 460                 pkey = ib_bth_get_pkey(ohdr);
 461                 sc = hfi1_9B_get_sc5(pkt->hdr, pkt->rhf);
 462                 dlid = ib_get_dlid(pkt->hdr);
 463                 slid = ib_get_slid(pkt->hdr);
 464                 hdr_type = HFI1_PKT_TYPE_9B;
 465         }
 466
 467         switch (qp->ibqp.qp_type) {
 468         case IB_QPT_UD:
 469                 dlid = ppd->lid;
 470                 rlid = slid;
 471                 rqpn = ib_get_sqpn(pkt->ohdr);
 472                 svc_type = IB_CC_SVCTYPE_UD;
 473                 break;
 474         case IB_QPT_SMI:
 475         case IB_QPT_GSI:
 476                 rlid = slid;
 477                 rqpn = ib_get_sqpn(pkt->ohdr);
 478                 svc_type = IB_CC_SVCTYPE_UD;
 479                 break;
 480         case IB_QPT_UC:
 481                 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
 482                 rqpn = qp->remote_qpn;
 483                 svc_type = IB_CC_SVCTYPE_UC;
 484                 break;
 485         case IB_QPT_RC:
 486                 rlid = rdma_ah_get_dlid(&qp->remote_ah_attr);
 487                 rqpn = qp->remote_qpn;
 488                 svc_type = IB_CC_SVCTYPE_RC;
 489                 break;
 490         default:
 491                 return;
 492         }
 493
 494         bth1 = be32_to_cpu(ohdr->bth[1]);
 495         /* Call appropriate CNP handler */
 496         if (do_cnp && (bth1 & IB_FECN_SMASK))
 497                 hfi1_handle_cnp_tbl[hdr_type](ibp, qp, rqpn, pkey,
 498                                               dlid, rlid, sc, grh);
 499
 500         if (!is_mcast && (bth1 & IB_BECN_SMASK)) {
 501                 u32 lqpn = bth1 & RVT_QPN_MASK;
 502                 u8 sl = ibp->sc_to_sl[sc];
 503
 504                 process_becn(ppd, sl, rlid, lqpn, rqpn, svc_type);
 505         }
 506
 507 }
 508
 509 struct ps_mdata {
 510         struct hfi1_ctxtdata *rcd;
 511         u32 rsize;
 512         u32 maxcnt;
 513         u32 ps_head;
 514         u32 ps_tail;
 515         u32 ps_seq;
 516 };
 517
 518 static inline void init_ps_mdata(struct ps_mdata *mdata,
 519                                  struct hfi1_packet *packet)
 520 {
 521         struct hfi1_ctxtdata *rcd = packet->rcd;
 522
 523         mdata->rcd = rcd;
 524         mdata->rsize = packet->rsize;
 525         mdata->maxcnt = packet->maxcnt;
 526         mdata->ps_head = packet->rhqoff;
 527
 528         if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) {
 529                 mdata->ps_tail = get_rcvhdrtail(rcd);
 530                 if (rcd->ctxt == HFI1_CTRL_CTXT)
 531                         mdata->ps_seq = rcd->seq_cnt;
 532                 else
 533                         mdata->ps_seq = 0; /* not used with DMA_RTAIL */
 534         } else {
 535                 mdata->ps_tail = 0; /* used only with DMA_RTAIL*/
 536                 mdata->ps_seq = rcd->seq_cnt;
 537         }
 538 }
 539
 540 static inline int ps_done(struct ps_mdata *mdata, u64 rhf,
 541                           struct hfi1_ctxtdata *rcd)
 542 {
 543         if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL))
 544                 return mdata->ps_head == mdata->ps_tail;
 545         return mdata->ps_seq != rhf_rcv_seq(rhf);
 546 }
 547
 548 static inline int ps_skip(struct ps_mdata *mdata, u64 rhf,
 549                           struct hfi1_ctxtdata *rcd)
 550 {
 551         /*
 552          * Control context can potentially receive an invalid rhf.
 553          * Drop such packets.
 554          */
 555         if ((rcd->ctxt == HFI1_CTRL_CTXT) && (mdata->ps_head != mdata->ps_tail))
 556                 return mdata->ps_seq != rhf_rcv_seq(rhf);
 557
 558         return 0;
 559 }
 560
 561 static inline void update_ps_mdata(struct ps_mdata *mdata,
 562                                    struct hfi1_ctxtdata *rcd)
 563 {
 564         mdata->ps_head += mdata->rsize;
 565         if (mdata->ps_head >= mdata->maxcnt)
 566                 mdata->ps_head = 0;
 567
 568         /* Control context must do seq counting */
 569         if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL) ||
 570             (rcd->ctxt == HFI1_CTRL_CTXT)) {
 571                 if (++mdata->ps_seq > 13)
 572                         mdata->ps_seq = 1;
 573         }
 574 }
 575
 576 /*
 577  * prescan_rxq - search through the receive queue looking for packets
 578  * containing Excplicit Congestion Notifications (FECNs, or BECNs).
 579  * When an ECN is found, process the Congestion Notification, and toggle
 580  * it off.
 581  * This is declared as a macro to allow quick checking of the port to avoid
 582  * the overhead of a function call if not enabled.
 583  */
 584 #define prescan_rxq(rcd, packet) \
 585         do { \
 586                 if (rcd->ppd->cc_prescan) \
 587                         __prescan_rxq(packet); \
 588         } while (0)
 589 static void __prescan_rxq(struct hfi1_packet *packet)
 590 {
 591         struct hfi1_ctxtdata *rcd = packet->rcd;
 592         struct ps_mdata mdata;
 593
 594         init_ps_mdata(&mdata, packet);
 595
 596         while (1) {
 597                 struct hfi1_devdata *dd = rcd->dd;
 598                 struct hfi1_ibport *ibp = rcd_to_iport(rcd);
 599                 __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +
 600                                          dd->rhf_offset;
 601                 struct rvt_qp *qp;
 602                 struct ib_header *hdr;
 603                 struct rvt_dev_info *rdi = &dd->verbs_dev.rdi;
 604                 u64 rhf = rhf_to_cpu(rhf_addr);
 605                 u32 etype = rhf_rcv_type(rhf), qpn, bth1;
 606                 int is_ecn = 0;
 607                 u8 lnh;
 608
 609                 if (ps_done(&mdata, rhf, rcd))
 610                         break;
 611
 612                 if (ps_skip(&mdata, rhf, rcd))
 613                         goto next;
 614
 615                 if (etype != RHF_RCV_TYPE_IB)
 616                         goto next;
 617
 618                 packet->hdr = hfi1_get_msgheader(dd, rhf_addr);
 619                 hdr = packet->hdr;
 620                 lnh = ib_get_lnh(hdr);
 621
 622                 if (lnh == HFI1_LRH_BTH) {
 623                         packet->ohdr = &hdr->u.oth;
 624                         packet->grh = NULL;
 625                 } else if (lnh == HFI1_LRH_GRH) {
 626                         packet->ohdr = &hdr->u.l.oth;
 627                         packet->grh = &hdr->u.l.grh;
 628                 } else {
 629                         goto next; /* just in case */
 630                 }
 631
 632                 bth1 = be32_to_cpu(packet->ohdr->bth[1]);
 633                 is_ecn = !!(bth1 & (IB_FECN_SMASK | IB_BECN_SMASK));
 634
 635                 if (!is_ecn)
 636                         goto next;
 637
 638                 qpn = bth1 & RVT_QPN_MASK;
 639                 rcu_read_lock();
 640                 qp = rvt_lookup_qpn(rdi, &ibp->rvp, qpn);
 641
 642                 if (!qp) {
 643                         rcu_read_unlock();
 644                         goto next;
 645                 }
 646
 647                 process_ecn(qp, packet, true);
 648                 rcu_read_unlock();
 649
 650                 /* turn off BECN, FECN */
 651                 bth1 &= ~(IB_FECN_SMASK | IB_BECN_SMASK);
 652                 packet->ohdr->bth[1] = cpu_to_be32(bth1);
 653 next:
 654                 update_ps_mdata(&mdata, rcd);
 655         }
 656 }
 657
 658 static void process_rcv_qp_work(struct hfi1_ctxtdata *rcd)
 659 {
 660         struct rvt_qp *qp, *nqp;
 661
 662         /*
 663          * Iterate over all QPs waiting to respond.
 664          * The list won't change since the IRQ is only run on one CPU.
 665          */
 666         list_for_each_entry_safe(qp, nqp, &rcd->qp_wait_list, rspwait) {
 667                 list_del_init(&qp->rspwait);
 668                 if (qp->r_flags & RVT_R_RSP_NAK) {
 669                         qp->r_flags &= ~RVT_R_RSP_NAK;
 670                         hfi1_send_rc_ack(rcd, qp, 0);
 671                 }
 672                 if (qp->r_flags & RVT_R_RSP_SEND) {
 673                         unsigned long flags;
 674
 675                         qp->r_flags &= ~RVT_R_RSP_SEND;
 676                         spin_lock_irqsave(&qp->s_lock, flags);
 677                         if (ib_rvt_state_ops[qp->state] &
 678                                         RVT_PROCESS_OR_FLUSH_SEND)
 679                                 hfi1_schedule_send(qp);
 680                         spin_unlock_irqrestore(&qp->s_lock, flags);
 681                 }
 682                 rvt_put_qp(qp);
 683         }
 684 }
 685
 686 static noinline int max_packet_exceeded(struct hfi1_packet *packet, int thread)
 687 {
 688         if (thread) {
 689                 if ((packet->numpkt & (MAX_PKT_RECV_THREAD - 1)) == 0)
 690                         /* allow defered processing */
 691                         process_rcv_qp_work(packet->rcd);
 692                 cond_resched();
 693                 return RCV_PKT_OK;
 694         } else {
 695                 this_cpu_inc(*packet->rcd->dd->rcv_limit);
 696                 return RCV_PKT_LIMIT;
 697         }
 698 }
 699
 700 static inline int check_max_packet(struct hfi1_packet *packet, int thread)
 701 {
 702         int ret = RCV_PKT_OK;
 703
 704         if (unlikely((packet->numpkt & (MAX_PKT_RECV - 1)) == 0))
 705                 ret = max_packet_exceeded(packet, thread);
 706         return ret;
 707 }
 708
 709 static noinline int skip_rcv_packet(struct hfi1_packet *packet, int thread)
 710 {
 711         int ret;
 712
 713         packet->rcd->dd->ctx0_seq_drop++;
 714         /* Set up for the next packet */
 715         packet->rhqoff += packet->rsize;
 716         if (packet->rhqoff >= packet->maxcnt)
 717                 packet->rhqoff = 0;
 718
 719         packet->numpkt++;
 720         ret = check_max_packet(packet, thread);
 721
 722         packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff +
 723                                      packet->rcd->dd->rhf_offset;
 724         packet->rhf = rhf_to_cpu(packet->rhf_addr);
 725
 726         return ret;
 727 }
 728
 729 static inline int process_rcv_packet(struct hfi1_packet *packet, int thread)
 730 {
 731         int ret;
 732
 733         packet->etype = rhf_rcv_type(packet->rhf);
 734
 735         /* total length */
 736         packet->tlen = rhf_pkt_len(packet->rhf); /* in bytes */
 737         /* retrieve eager buffer details */
 738         packet->ebuf = NULL;
 739         if (rhf_use_egr_bfr(packet->rhf)) {
 740                 packet->etail = rhf_egr_index(packet->rhf);
 741                 packet->ebuf = get_egrbuf(packet->rcd, packet->rhf,
 742                                  &packet->updegr);
 743                 /*
 744                  * Prefetch the contents of the eager buffer.  It is
 745                  * OK to send a negative length to prefetch_range().
 746                  * The +2 is the size of the RHF.
 747                  */
 748                 prefetch_range(packet->ebuf,
 749                                packet->tlen - ((packet->rcd->rcvhdrqentsize -
 750                                                (rhf_hdrq_offset(packet->rhf)
 751                                                 + 2)) * 4));
 752         }
 753
 754         /*
 755          * Call a type specific handler for the packet. We
 756          * should be able to trust that etype won't be beyond
 757          * the range of valid indexes. If so something is really
 758          * wrong and we can probably just let things come
 759          * crashing down. There is no need to eat another
 760          * comparison in this performance critical code.
 761          */
 762         packet->rcd->dd->rhf_rcv_function_map[packet->etype](packet);
 763         packet->numpkt++;
 764
 765         /* Set up for the next packet */
 766         packet->rhqoff += packet->rsize;
 767         if (packet->rhqoff >= packet->maxcnt)
 768                 packet->rhqoff = 0;
 769
 770         ret = check_max_packet(packet, thread);
 771
 772         packet->rhf_addr = (__le32 *)packet->rcd->rcvhdrq + packet->rhqoff +
 773                                       packet->rcd->dd->rhf_offset;
 774         packet->rhf = rhf_to_cpu(packet->rhf_addr);
 775
 776         return ret;
 777 }
 778
 779 static inline void process_rcv_update(int last, struct hfi1_packet *packet)
 780 {
 781         /*
 782          * Update head regs etc., every 16 packets, if not last pkt,
 783          * to help prevent rcvhdrq overflows, when many packets
 784          * are processed and queue is nearly full.
 785          * Don't request an interrupt for intermediate updates.
 786          */
 787         if (!last && !(packet->numpkt & 0xf)) {
 788                 update_usrhead(packet->rcd, packet->rhqoff, packet->updegr,
 789                                packet->etail, 0, 0);
 790                 packet->updegr = 0;
 791         }
 792         packet->grh = NULL;
 793 }
 794
 795 static inline void finish_packet(struct hfi1_packet *packet)
 796 {
 797         /*
 798          * Nothing we need to free for the packet.
 799          *
 800          * The only thing we need to do is a final update and call for an
 801          * interrupt
 802          */
 803         update_usrhead(packet->rcd, packet->rcd->head, packet->updegr,
 804                        packet->etail, rcv_intr_dynamic, packet->numpkt);
 805 }
 806
 807 /*
 808  * Handle receive interrupts when using the no dma rtail option.
 809  */
 810 int handle_receive_interrupt_nodma_rtail(struct hfi1_ctxtdata *rcd, int thread)
 811 {
 812         u32 seq;
 813         int last = RCV_PKT_OK;
 814         struct hfi1_packet packet;
 815
 816         init_packet(rcd, &packet);
 817         seq = rhf_rcv_seq(packet.rhf);
 818         if (seq != rcd->seq_cnt) {
 819                 last = RCV_PKT_DONE;
 820                 goto bail;
 821         }
 822
 823         prescan_rxq(rcd, &packet);
 824
 825         while (last == RCV_PKT_OK) {
 826                 last = process_rcv_packet(&packet, thread);
 827                 seq = rhf_rcv_seq(packet.rhf);
 828                 if (++rcd->seq_cnt > 13)
 829                         rcd->seq_cnt = 1;
 830                 if (seq != rcd->seq_cnt)
 831                         last = RCV_PKT_DONE;
 832                 process_rcv_update(last, &packet);
 833         }
 834         process_rcv_qp_work(rcd);
 835         rcd->head = packet.rhqoff;
 836 bail:
 837         finish_packet(&packet);
 838         return last;
 839 }
 840
 841 int handle_receive_interrupt_dma_rtail(struct hfi1_ctxtdata *rcd, int thread)
 842 {
 843         u32 hdrqtail;
 844         int last = RCV_PKT_OK;
 845         struct hfi1_packet packet;
 846
 847         init_packet(rcd, &packet);
 848         hdrqtail = get_rcvhdrtail(rcd);
 849         if (packet.rhqoff == hdrqtail) {
 850                 last = RCV_PKT_DONE;
 851                 goto bail;
 852         }
 853         smp_rmb();  /* prevent speculative reads of dma'ed hdrq */
 854
 855         prescan_rxq(rcd, &packet);
 856
 857         while (last == RCV_PKT_OK) {
 858                 last = process_rcv_packet(&packet, thread);
 859                 if (packet.rhqoff == hdrqtail)
 860                         last = RCV_PKT_DONE;
 861                 process_rcv_update(last, &packet);
 862         }
 863         process_rcv_qp_work(rcd);
 864         rcd->head = packet.rhqoff;
 865 bail:
 866         finish_packet(&packet);
 867         return last;
 868 }
 869
 870 static inline void set_nodma_rtail(struct hfi1_devdata *dd, u16 ctxt)
 871 {
 872         struct hfi1_ctxtdata *rcd;
 873         u16 i;
 874
 875         /*
 876          * For dynamically allocated kernel contexts (like vnic) switch
 877          * interrupt handler only for that context. Otherwise, switch
 878          * interrupt handler for all statically allocated kernel contexts.
 879          */
 880         if (ctxt >= dd->first_dyn_alloc_ctxt) {
 881                 rcd = hfi1_rcd_get_by_index(dd, ctxt);
 882                 if (rcd) {
 883                         rcd->do_interrupt =
 884                                 &handle_receive_interrupt_nodma_rtail;
 885                         hfi1_rcd_put(rcd);
 886                 }
 887                 return;
 888         }
 889
 890         for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) {
 891                 rcd = hfi1_rcd_get_by_index(dd, i);
 892                 if (rcd)
 893                         rcd->do_interrupt =
 894                                 &handle_receive_interrupt_nodma_rtail;
 895                 hfi1_rcd_put(rcd);
 896         }
 897 }
 898
 899 static inline void set_dma_rtail(struct hfi1_devdata *dd, u16 ctxt)
 900 {
 901         struct hfi1_ctxtdata *rcd;
 902         u16 i;
 903
 904         /*
 905          * For dynamically allocated kernel contexts (like vnic) switch
 906          * interrupt handler only for that context. Otherwise, switch
 907          * interrupt handler for all statically allocated kernel contexts.
 908          */
 909         if (ctxt >= dd->first_dyn_alloc_ctxt) {
 910                 rcd = hfi1_rcd_get_by_index(dd, ctxt);
 911                 if (rcd) {
 912                         rcd->do_interrupt =
 913                                 &handle_receive_interrupt_dma_rtail;
 914                         hfi1_rcd_put(rcd);
 915                 }
 916                 return;
 917         }
 918
 919         for (i = HFI1_CTRL_CTXT + 1; i < dd->first_dyn_alloc_ctxt; i++) {
 920                 rcd = hfi1_rcd_get_by_index(dd, i);
 921                 if (rcd)
 922                         rcd->do_interrupt =
 923                                 &handle_receive_interrupt_dma_rtail;
 924                 hfi1_rcd_put(rcd);
 925         }
 926 }
 927
 928 void set_all_slowpath(struct hfi1_devdata *dd)
 929 {
 930         struct hfi1_ctxtdata *rcd;
 931         u16 i;
 932
 933         /* HFI1_CTRL_CTXT must always use the slow path interrupt handler */
 934         for (i = HFI1_CTRL_CTXT + 1; i < dd->num_rcv_contexts; i++) {
 935                 rcd = hfi1_rcd_get_by_index(dd, i);
 936                 if (!rcd)
 937                         continue;
 938                 if ((i < dd->first_dyn_alloc_ctxt) ||
 939                     (rcd->sc && (rcd->sc->type == SC_KERNEL))) {
 940                         rcd->do_interrupt = &handle_receive_interrupt;
 941                 }
 942                 hfi1_rcd_put(rcd);
 943         }
 944 }
 945
 946 static inline int set_armed_to_active(struct hfi1_ctxtdata *rcd,
 947                                       struct hfi1_packet *packet,
 948                                       struct hfi1_devdata *dd)
 949 {
 950         struct work_struct *lsaw = &rcd->ppd->linkstate_active_work;
 951         u8 etype = rhf_rcv_type(packet->rhf);
 952         u8 sc = SC15_PACKET;
 953
 954         if (etype == RHF_RCV_TYPE_IB) {
 955                 struct ib_header *hdr = hfi1_get_msgheader(packet->rcd->dd,
 956                                                            packet->rhf_addr);
 957                 sc = hfi1_9B_get_sc5(hdr, packet->rhf);
 958         } else if (etype == RHF_RCV_TYPE_BYPASS) {
 959                 struct hfi1_16b_header *hdr = hfi1_get_16B_header(
 960                                                 packet->rcd->dd,
 961                                                 packet->rhf_addr);
 962                 sc = hfi1_16B_get_sc(hdr);
 963         }
 964         if (sc != SC15_PACKET) {
 965                 int hwstate = driver_lstate(rcd->ppd);
 966
 967                 if (hwstate != IB_PORT_ACTIVE) {
 968                         dd_dev_info(dd,
 969                                     "Unexpected link state %s\n",
 970                                     opa_lstate_name(hwstate));
 971                         return 0;
 972                 }
 973
 974                 queue_work(rcd->ppd->link_wq, lsaw);
 975                 return 1;
 976         }
 977         return 0;
 978 }
 979
 980 /*
 981  * handle_receive_interrupt - receive a packet
 982  * @rcd: the context
 983  *
 984  * Called from interrupt handler for errors or receive interrupt.
 985  * This is the slow path interrupt handler.
 986  */
 987 int handle_receive_interrupt(struct hfi1_ctxtdata *rcd, int thread)
 988 {
 989         struct hfi1_devdata *dd = rcd->dd;
 990         u32 hdrqtail;
 991         int needset, last = RCV_PKT_OK;
 992         struct hfi1_packet packet;
 993         int skip_pkt = 0;
 994
 995         /* Control context will always use the slow path interrupt handler */
 996         needset = (rcd->ctxt == HFI1_CTRL_CTXT) ? 0 : 1;
 997
 998         init_packet(rcd, &packet);
 999
1000         if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) {
1001                 u32 seq = rhf_rcv_seq(packet.rhf);
1002
1003                 if (seq != rcd->seq_cnt) {
1004                         last = RCV_PKT_DONE;
1005                         goto bail;
1006                 }
1007                 hdrqtail = 0;
1008         } else {
1009                 hdrqtail = get_rcvhdrtail(rcd);
1010                 if (packet.rhqoff == hdrqtail) {
1011                         last = RCV_PKT_DONE;
1012                         goto bail;
1013                 }
1014                 smp_rmb();  /* prevent speculative reads of dma'ed hdrq */
1015
1016                 /*
1017                  * Control context can potentially receive an invalid
1018                  * rhf. Drop such packets.
1019                  */
1020                 if (rcd->ctxt == HFI1_CTRL_CTXT) {
1021                         u32 seq = rhf_rcv_seq(packet.rhf);
1022
1023                         if (seq != rcd->seq_cnt)
1024                                 skip_pkt = 1;
1025                 }
1026         }
1027
1028         prescan_rxq(rcd, &packet);
1029
1030         while (last == RCV_PKT_OK) {
1031                 if (unlikely(dd->do_drop &&
1032                              atomic_xchg(&dd->drop_packet, DROP_PACKET_OFF) ==
1033                              DROP_PACKET_ON)) {
1034                         dd->do_drop = 0;
1035
1036                         /* On to the next packet */
1037                         packet.rhqoff += packet.rsize;
1038                         packet.rhf_addr = (__le32 *)rcd->rcvhdrq +
1039                                           packet.rhqoff +
1040                                           dd->rhf_offset;
1041                         packet.rhf = rhf_to_cpu(packet.rhf_addr);
1042
1043                 } else if (skip_pkt) {
1044                         last = skip_rcv_packet(&packet, thread);
1045                         skip_pkt = 0;
1046                 } else {
1047                         /* Auto activate link on non-SC15 packet receive */
1048                         if (unlikely(rcd->ppd->host_link_state ==
1049                                      HLS_UP_ARMED) &&
1050                             set_armed_to_active(rcd, &packet, dd))
1051                                 goto bail;
1052                         last = process_rcv_packet(&packet, thread);
1053                 }
1054
1055                 if (!HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) {
1056                         u32 seq = rhf_rcv_seq(packet.rhf);
1057
1058                         if (++rcd->seq_cnt > 13)
1059                                 rcd->seq_cnt = 1;
1060                         if (seq != rcd->seq_cnt)
1061                                 last = RCV_PKT_DONE;
1062                         if (needset) {
1063                                 dd_dev_info(dd, "Switching to NO_DMA_RTAIL\n");
1064                                 set_nodma_rtail(dd, rcd->ctxt);
1065                                 needset = 0;
1066                         }
1067                 } else {
1068                         if (packet.rhqoff == hdrqtail)
1069                                 last = RCV_PKT_DONE;
1070                         /*
1071                          * Control context can potentially receive an invalid
1072                          * rhf. Drop such packets.
1073                          */
1074                         if (rcd->ctxt == HFI1_CTRL_CTXT) {
1075                                 u32 seq = rhf_rcv_seq(packet.rhf);
1076
1077                                 if (++rcd->seq_cnt > 13)
1078                                         rcd->seq_cnt = 1;
1079                                 if (!last && (seq != rcd->seq_cnt))
1080                                         skip_pkt = 1;
1081                         }
1082
1083                         if (needset) {
1084                                 dd_dev_info(dd,
1085                                             "Switching to DMA_RTAIL\n");
1086                                 set_dma_rtail(dd, rcd->ctxt);
1087                                 needset = 0;
1088                         }
1089                 }
1090
1091                 process_rcv_update(last, &packet);
1092         }
1093
1094         process_rcv_qp_work(rcd);
1095         rcd->head = packet.rhqoff;
1096
1097 bail:
1098         /*
1099          * Always write head at end, and setup rcv interrupt, even
1100          * if no packets were processed.
1101          */
1102         finish_packet(&packet);
1103         return last;
1104 }
1105
1106 /*
1107  * We may discover in the interrupt that the hardware link state has
1108  * changed from ARMED to ACTIVE (due to the arrival of a non-SC15 packet),
1109  * and we need to update the driver's notion of the link state.  We cannot
1110  * run set_link_state from interrupt context, so we queue this function on
1111  * a workqueue.
1112  *
1113  * We delay the regular interrupt processing until after the state changes
1114  * so that the link will be in the correct state by the time any application
1115  * we wake up attempts to send a reply to any message it received.
1116  * (Subsequent receive interrupts may possibly force the wakeup before we
1117  * update the link state.)
1118  *
1119  * The rcd is freed in hfi1_free_ctxtdata after hfi1_postinit_cleanup invokes
1120  * dd->f_cleanup(dd) to disable the interrupt handler and flush workqueues,
1121  * so we're safe from use-after-free of the rcd.
1122  */
1123 void receive_interrupt_work(struct work_struct *work)
1124 {
1125         struct hfi1_pportdata *ppd = container_of(work, struct hfi1_pportdata,
1126                                                   linkstate_active_work);
1127         struct hfi1_devdata *dd = ppd->dd;
1128         struct hfi1_ctxtdata *rcd;
1129         u16 i;
1130
1131         /* Received non-SC15 packet implies neighbor_normal */
1132         ppd->neighbor_normal = 1;
1133         set_link_state(ppd, HLS_UP_ACTIVE);
1134
1135         /*
1136          * Interrupt all statically allocated kernel contexts that could
1137          * have had an interrupt during auto activation.
1138          */
1139         for (i = HFI1_CTRL_CTXT; i < dd->first_dyn_alloc_ctxt; i++) {
1140                 rcd = hfi1_rcd_get_by_index(dd, i);
1141                 if (rcd)
1142                         force_recv_intr(rcd);
1143                 hfi1_rcd_put(rcd);
1144         }
1145 }
1146
1147 /*
1148  * Convert a given MTU size to the on-wire MAD packet enumeration.
1149  * Return -1 if the size is invalid.
1150  */
1151 int mtu_to_enum(u32 mtu, int default_if_bad)
1152 {
1153         switch (mtu) {
1154         case     0: return OPA_MTU_0;
1155         case   256: return OPA_MTU_256;
1156         case   512: return OPA_MTU_512;
1157         case  1024: return OPA_MTU_1024;
1158         case  2048: return OPA_MTU_2048;
1159         case  4096: return OPA_MTU_4096;
1160         case  8192: return OPA_MTU_8192;
1161         case 10240: return OPA_MTU_10240;
1162         }
1163         return default_if_bad;
1164 }
1165
1166 u16 enum_to_mtu(int mtu)
1167 {
1168         switch (mtu) {
1169         case OPA_MTU_0:     return 0;
1170         case OPA_MTU_256:   return 256;
1171         case OPA_MTU_512:   return 512;
1172         case OPA_MTU_1024:  return 1024;
1173         case OPA_MTU_2048:  return 2048;
1174         case OPA_MTU_4096:  return 4096;
1175         case OPA_MTU_8192:  return 8192;
1176         case OPA_MTU_10240: return 10240;
1177         default: return 0xffff;
1178         }
1179 }
1180
1181 /*
1182  * set_mtu - set the MTU
1183  * @ppd: the per port data
1184  *
1185  * We can handle "any" incoming size, the issue here is whether we
1186  * need to restrict our outgoing size.  We do not deal with what happens
1187  * to programs that are already running when the size changes.
1188  */
1189 int set_mtu(struct hfi1_pportdata *ppd)
1190 {
1191         struct hfi1_devdata *dd = ppd->dd;
1192         int i, drain, ret = 0, is_up = 0;
1193
1194         ppd->ibmtu = 0;
1195         for (i = 0; i < ppd->vls_supported; i++)
1196                 if (ppd->ibmtu < dd->vld[i].mtu)
1197                         ppd->ibmtu = dd->vld[i].mtu;
1198         ppd->ibmaxlen = ppd->ibmtu + lrh_max_header_bytes(ppd->dd);
1199
1200         mutex_lock(&ppd->hls_lock);
1201         if (ppd->host_link_state == HLS_UP_INIT ||
1202             ppd->host_link_state == HLS_UP_ARMED ||
1203             ppd->host_link_state == HLS_UP_ACTIVE)
1204                 is_up = 1;
1205
1206         drain = !is_ax(dd) && is_up;
1207
1208         if (drain)
1209                 /*
1210                  * MTU is specified per-VL. To ensure that no packet gets
1211                  * stuck (due, e.g., to the MTU for the packet's VL being
1212                  * reduced), empty the per-VL FIFOs before adjusting MTU.
1213                  */
1214                 ret = stop_drain_data_vls(dd);
1215
1216         if (ret) {
1217                 dd_dev_err(dd, "%s: cannot stop/drain VLs - refusing to change per-VL MTUs\n",
1218                            __func__);
1219                 goto err;
1220         }
1221
1222         hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_MTU, 0);
1223
1224         if (drain)
1225                 open_fill_data_vls(dd); /* reopen all VLs */
1226
1227 err:
1228         mutex_unlock(&ppd->hls_lock);
1229
1230         return ret;
1231 }
1232
1233 int hfi1_set_lid(struct hfi1_pportdata *ppd, u32 lid, u8 lmc)
1234 {
1235         struct hfi1_devdata *dd = ppd->dd;
1236
1237         ppd->lid = lid;
1238         ppd->lmc = lmc;
1239         hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_LIDLMC, 0);
1240
1241         dd_dev_info(dd, "port %u: got a lid: 0x%x\n", ppd->port, lid);
1242
1243         return 0;
1244 }
1245
1246 void shutdown_led_override(struct hfi1_pportdata *ppd)
1247 {
1248         struct hfi1_devdata *dd = ppd->dd;
1249
1250         /*
1251          * This pairs with the memory barrier in hfi1_start_led_override to
1252          * ensure that we read the correct state of LED beaconing represented
1253          * by led_override_timer_active
1254          */
1255         smp_rmb();
1256         if (atomic_read(&ppd->led_override_timer_active)) {
1257                 del_timer_sync(&ppd->led_override_timer);
1258                 atomic_set(&ppd->led_override_timer_active, 0);
1259                 /* Ensure the atomic_set is visible to all CPUs */
1260                 smp_wmb();
1261         }
1262
1263         /* Hand control of the LED to the DC for normal operation */
1264         write_csr(dd, DCC_CFG_LED_CNTRL, 0);
1265 }
1266
1267 static void run_led_override(unsigned long opaque)
1268 {
1269         struct hfi1_pportdata *ppd = (struct hfi1_pportdata *)opaque;
1270         struct hfi1_devdata *dd = ppd->dd;
1271         unsigned long timeout;
1272         int phase_idx;
1273
1274         if (!(dd->flags & HFI1_INITTED))
1275                 return;
1276
1277         phase_idx = ppd->led_override_phase & 1;
1278
1279         setextled(dd, phase_idx);
1280
1281         timeout = ppd->led_override_vals[phase_idx];
1282
1283         /* Set up for next phase */
1284         ppd->led_override_phase = !ppd->led_override_phase;
1285
1286         mod_timer(&ppd->led_override_timer, jiffies + timeout);
1287 }
1288
1289 /*
1290  * To have the LED blink in a particular pattern, provide timeon and timeoff
1291  * in milliseconds.
1292  * To turn off custom blinking and return to normal operation, use
1293  * shutdown_led_override()
1294  */
1295 void hfi1_start_led_override(struct hfi1_pportdata *ppd, unsigned int timeon,
1296                              unsigned int timeoff)
1297 {
1298         if (!(ppd->dd->flags & HFI1_INITTED))
1299                 return;
1300
1301         /* Convert to jiffies for direct use in timer */
1302         ppd->led_override_vals[0] = msecs_to_jiffies(timeoff);
1303         ppd->led_override_vals[1] = msecs_to_jiffies(timeon);
1304
1305         /* Arbitrarily start from LED on phase */
1306         ppd->led_override_phase = 1;
1307
1308         /*
1309          * If the timer has not already been started, do so. Use a "quick"
1310          * timeout so the handler will be called soon to look at our request.
1311          */
1312         if (!timer_pending(&ppd->led_override_timer)) {
1313                 setup_timer(&ppd->led_override_timer, run_led_override,
1314                             (unsigned long)ppd);
1315                 ppd->led_override_timer.expires = jiffies + 1;
1316                 add_timer(&ppd->led_override_timer);
1317                 atomic_set(&ppd->led_override_timer_active, 1);
1318                 /* Ensure the atomic_set is visible to all CPUs */
1319                 smp_wmb();
1320         }
1321 }
1322
1323 /**
1324  * hfi1_reset_device - reset the chip if possible
1325  * @unit: the device to reset
1326  *
1327  * Whether or not reset is successful, we attempt to re-initialize the chip
1328  * (that is, much like a driver unload/reload).  We clear the INITTED flag
1329  * so that the various entry points will fail until we reinitialize.  For
1330  * now, we only allow this if no user contexts are open that use chip resources
1331  */
1332 int hfi1_reset_device(int unit)
1333 {
1334         int ret;
1335         struct hfi1_devdata *dd = hfi1_lookup(unit);
1336         struct hfi1_pportdata *ppd;
1337         int pidx;
1338
1339         if (!dd) {
1340                 ret = -ENODEV;
1341                 goto bail;
1342         }
1343
1344         dd_dev_info(dd, "Reset on unit %u requested\n", unit);
1345
1346         if (!dd->kregbase1 || !(dd->flags & HFI1_PRESENT)) {
1347                 dd_dev_info(dd,
1348                             "Invalid unit number %u or not initialized or not present\n",
1349                             unit);
1350                 ret = -ENXIO;
1351                 goto bail;
1352         }
1353
1354         /* If there are any user/vnic contexts, we cannot reset */
1355         mutex_lock(&hfi1_mutex);
1356         if (dd->rcd)
1357                 if (hfi1_stats.sps_ctxts) {
1358                         mutex_unlock(&hfi1_mutex);
1359                         ret = -EBUSY;
1360                         goto bail;
1361                 }
1362         mutex_unlock(&hfi1_mutex);
1363
1364         for (pidx = 0; pidx < dd->num_pports; ++pidx) {
1365                 ppd = dd->pport + pidx;
1366
1367                 shutdown_led_override(ppd);
1368         }
1369         if (dd->flags & HFI1_HAS_SEND_DMA)
1370                 sdma_exit(dd);
1371
1372         hfi1_reset_cpu_counters(dd);
1373
1374         ret = hfi1_init(dd, 1);
1375
1376         if (ret)
1377                 dd_dev_err(dd,
1378                            "Reinitialize unit %u after reset failed with %d\n",
1379                            unit, ret);
1380         else
1381                 dd_dev_info(dd, "Reinitialized unit %u after resetting\n",
1382                             unit);
1383
1384 bail:
1385         return ret;
1386 }
1387
1388 static inline void hfi1_setup_ib_header(struct hfi1_packet *packet)
1389 {
1390         packet->hdr = (struct hfi1_ib_message_header *)
1391                         hfi1_get_msgheader(packet->rcd->dd,
1392                                            packet->rhf_addr);
1393         packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
1394 }
1395
1396 static int hfi1_bypass_ingress_pkt_check(struct hfi1_packet *packet)
1397 {
1398         struct hfi1_pportdata *ppd = packet->rcd->ppd;
1399
1400         /* slid and dlid cannot be 0 */
1401         if ((!packet->slid) || (!packet->dlid))
1402                 return -EINVAL;
1403
1404         /* Compare port lid with incoming packet dlid */
1405         if ((!(hfi1_is_16B_mcast(packet->dlid))) &&
1406             (packet->dlid !=
1407                 opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE), 16B))) {
1408                 if (packet->dlid != ppd->lid)
1409                         return -EINVAL;
1410         }
1411
1412         /* No multicast packets with SC15 */
1413         if ((hfi1_is_16B_mcast(packet->dlid)) && (packet->sc == 0xF))
1414                 return -EINVAL;
1415
1416         /* Packets with permissive DLID always on SC15 */
1417         if ((packet->dlid == opa_get_lid(be32_to_cpu(OPA_LID_PERMISSIVE),
1418                                          16B)) &&
1419             (packet->sc != 0xF))
1420                 return -EINVAL;
1421
1422         return 0;
1423 }
1424
1425 static int hfi1_setup_9B_packet(struct hfi1_packet *packet)
1426 {
1427         struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd);
1428         struct ib_header *hdr;
1429         u8 lnh;
1430
1431         hfi1_setup_ib_header(packet);
1432         hdr = packet->hdr;
1433
1434         lnh = ib_get_lnh(hdr);
1435         if (lnh == HFI1_LRH_BTH) {
1436                 packet->ohdr = &hdr->u.oth;
1437                 packet->grh = NULL;
1438         } else if (lnh == HFI1_LRH_GRH) {
1439                 u32 vtf;
1440
1441                 packet->ohdr = &hdr->u.l.oth;
1442                 packet->grh = &hdr->u.l.grh;
1443                 if (packet->grh->next_hdr != IB_GRH_NEXT_HDR)
1444                         goto drop;
1445                 vtf = be32_to_cpu(packet->grh->version_tclass_flow);
1446                 if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
1447                         goto drop;
1448         } else {
1449                 goto drop;
1450         }
1451
1452         /* Query commonly used fields from packet header */
1453         packet->payload = packet->ebuf;
1454         packet->opcode = ib_bth_get_opcode(packet->ohdr);
1455         packet->slid = ib_get_slid(hdr);
1456         packet->dlid = ib_get_dlid(hdr);
1457         if (unlikely((packet->dlid >= be16_to_cpu(IB_MULTICAST_LID_BASE)) &&
1458                      (packet->dlid != be16_to_cpu(IB_LID_PERMISSIVE))))
1459                 packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
1460                                 be16_to_cpu(IB_MULTICAST_LID_BASE);
1461         packet->sl = ib_get_sl(hdr);
1462         packet->sc = hfi1_9B_get_sc5(hdr, packet->rhf);
1463         packet->pad = ib_bth_get_pad(packet->ohdr);
1464         packet->extra_byte = 0;
1465         packet->fecn = ib_bth_get_fecn(packet->ohdr);
1466         packet->becn = ib_bth_get_becn(packet->ohdr);
1467
1468         return 0;
1469 drop:
1470         ibp->rvp.n_pkt_drops++;
1471         return -EINVAL;
1472 }
1473
1474 static int hfi1_setup_bypass_packet(struct hfi1_packet *packet)
1475 {
1476         /*
1477          * Bypass packets have a different header/payload split
1478          * compared to an IB packet.
1479          * Current split is set such that 16 bytes of the actual
1480          * header is in the header buffer and the remining is in
1481          * the eager buffer. We chose 16 since hfi1 driver only
1482          * supports 16B bypass packets and we will be able to
1483          * receive the entire LRH with such a split.
1484          */
1485
1486         struct hfi1_ctxtdata *rcd = packet->rcd;
1487         struct hfi1_pportdata *ppd = rcd->ppd;
1488         struct hfi1_ibport *ibp = &ppd->ibport_data;
1489         u8 l4;
1490         u8 grh_len;
1491
1492         packet->hdr = (struct hfi1_16b_header *)
1493                         hfi1_get_16B_header(packet->rcd->dd,
1494                                             packet->rhf_addr);
1495         packet->hlen = (u8 *)packet->rhf_addr - (u8 *)packet->hdr;
1496
1497         l4 = hfi1_16B_get_l4(packet->hdr);
1498         if (l4 == OPA_16B_L4_IB_LOCAL) {
1499                 grh_len = 0;
1500                 packet->ohdr = packet->ebuf;
1501                 packet->grh = NULL;
1502         } else if (l4 == OPA_16B_L4_IB_GLOBAL) {
1503                 u32 vtf;
1504
1505                 grh_len = sizeof(struct ib_grh);
1506                 packet->ohdr = packet->ebuf + grh_len;
1507                 packet->grh = packet->ebuf;
1508                 if (packet->grh->next_hdr != IB_GRH_NEXT_HDR)
1509                         goto drop;
1510                 vtf = be32_to_cpu(packet->grh->version_tclass_flow);
1511                 if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION)
1512                         goto drop;
1513         } else {
1514                 goto drop;
1515         }
1516
1517         /* Query commonly used fields from packet header */
1518         packet->opcode = ib_bth_get_opcode(packet->ohdr);
1519         packet->hlen = hdr_len_by_opcode[packet->opcode] + 8 + grh_len;
1520         packet->payload = packet->ebuf + packet->hlen - (4 * sizeof(u32));
1521         packet->slid = hfi1_16B_get_slid(packet->hdr);
1522         packet->dlid = hfi1_16B_get_dlid(packet->hdr);
1523         if (unlikely(hfi1_is_16B_mcast(packet->dlid)))
1524                 packet->dlid += opa_get_mcast_base(OPA_MCAST_NR) -
1525                                 opa_get_lid(opa_get_mcast_base(OPA_MCAST_NR),
1526                                             16B);
1527         packet->sc = hfi1_16B_get_sc(packet->hdr);
1528         packet->sl = ibp->sc_to_sl[packet->sc];
1529         packet->pad = hfi1_16B_bth_get_pad(packet->ohdr);
1530         packet->extra_byte = SIZE_OF_LT;
1531         packet->fecn = hfi1_16B_get_fecn(packet->hdr);
1532         packet->becn = hfi1_16B_get_becn(packet->hdr);
1533
1534         if (hfi1_bypass_ingress_pkt_check(packet))
1535                 goto drop;
1536
1537         return 0;
1538 drop:
1539         hfi1_cdbg(PKT, "%s: packet dropped\n", __func__);
1540         ibp->rvp.n_pkt_drops++;
1541         return -EINVAL;
1542 }
1543
1544 void handle_eflags(struct hfi1_packet *packet)
1545 {
1546         struct hfi1_ctxtdata *rcd = packet->rcd;
1547         u32 rte = rhf_rcv_type_err(packet->rhf);
1548
1549         rcv_hdrerr(rcd, rcd->ppd, packet);
1550         if (rhf_err_flags(packet->rhf))
1551                 dd_dev_err(rcd->dd,
1552                            "receive context %d: rhf 0x%016llx, errs [ %s%s%s%s%s%s%s%s] rte 0x%x\n",
1553                            rcd->ctxt, packet->rhf,
1554                            packet->rhf & RHF_K_HDR_LEN_ERR ? "k_hdr_len " : "",
1555                            packet->rhf & RHF_DC_UNC_ERR ? "dc_unc " : "",
1556                            packet->rhf & RHF_DC_ERR ? "dc " : "",
1557                            packet->rhf & RHF_TID_ERR ? "tid " : "",
1558                            packet->rhf & RHF_LEN_ERR ? "len " : "",
1559                            packet->rhf & RHF_ECC_ERR ? "ecc " : "",
1560                            packet->rhf & RHF_VCRC_ERR ? "vcrc " : "",
1561                            packet->rhf & RHF_ICRC_ERR ? "icrc " : "",
1562                            rte);
1563 }
1564
1565 /*
1566  * The following functions are called by the interrupt handler. They are type
1567  * specific handlers for each packet type.
1568  */
1569 int process_receive_ib(struct hfi1_packet *packet)
1570 {
1571         if (unlikely(hfi1_dbg_fault_packet(packet)))
1572                 return RHF_RCV_CONTINUE;
1573
1574         if (hfi1_setup_9B_packet(packet))
1575                 return RHF_RCV_CONTINUE;
1576
1577         trace_hfi1_rcvhdr(packet->rcd->ppd->dd,
1578                           packet->rcd->ctxt,
1579                           rhf_err_flags(packet->rhf),
1580                           RHF_RCV_TYPE_IB,
1581                           packet->hlen,
1582                           packet->tlen,
1583                           packet->updegr,
1584                           rhf_egr_index(packet->rhf));
1585
1586         if (unlikely(
1587                  (hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) &&
1588                  (packet->rhf & RHF_DC_ERR))))
1589                 return RHF_RCV_CONTINUE;
1590
1591         if (unlikely(rhf_err_flags(packet->rhf))) {
1592                 handle_eflags(packet);
1593                 return RHF_RCV_CONTINUE;
1594         }
1595
1596         hfi1_ib_rcv(packet);
1597         return RHF_RCV_CONTINUE;
1598 }
1599
1600 static inline bool hfi1_is_vnic_packet(struct hfi1_packet *packet)
1601 {
1602         /* Packet received in VNIC context via RSM */
1603         if (packet->rcd->is_vnic)
1604                 return true;
1605
1606         if ((hfi1_16B_get_l2(packet->ebuf) == OPA_16B_L2_TYPE) &&
1607             (hfi1_16B_get_l4(packet->ebuf) == OPA_16B_L4_ETHR))
1608                 return true;
1609
1610         return false;
1611 }
1612
1613 int process_receive_bypass(struct hfi1_packet *packet)
1614 {
1615         struct hfi1_devdata *dd = packet->rcd->dd;
1616
1617         if (hfi1_is_vnic_packet(packet)) {
1618                 hfi1_vnic_bypass_rcv(packet);
1619                 return RHF_RCV_CONTINUE;
1620         }
1621
1622         if (hfi1_setup_bypass_packet(packet))
1623                 return RHF_RCV_CONTINUE;
1624
1625         if (unlikely(rhf_err_flags(packet->rhf))) {
1626                 handle_eflags(packet);
1627                 return RHF_RCV_CONTINUE;
1628         }
1629
1630         if (hfi1_16B_get_l2(packet->hdr) == 0x2) {
1631                 hfi1_16B_rcv(packet);
1632         } else {
1633                 dd_dev_err(dd,
1634                            "Bypass packets other than 16B are not supported in normal operation. Dropping\n");
1635                 incr_cntr64(&dd->sw_rcv_bypass_packet_errors);
1636                 if (!(dd->err_info_rcvport.status_and_code &
1637                       OPA_EI_STATUS_SMASK)) {
1638                         u64 *flits = packet->ebuf;
1639
1640                         if (flits && !(packet->rhf & RHF_LEN_ERR)) {
1641                                 dd->err_info_rcvport.packet_flit1 = flits[0];
1642                                 dd->err_info_rcvport.packet_flit2 =
1643                                         packet->tlen > sizeof(flits[0]) ?
1644                                         flits[1] : 0;
1645                         }
1646                         dd->err_info_rcvport.status_and_code |=
1647                                 (OPA_EI_STATUS_SMASK | BAD_L2_ERR);
1648                 }
1649         }
1650         return RHF_RCV_CONTINUE;
1651 }
1652
1653 int process_receive_error(struct hfi1_packet *packet)
1654 {
1655         /* KHdrHCRCErr -- KDETH packet with a bad HCRC */
1656         if (unlikely(
1657                  hfi1_dbg_fault_suppress_err(&packet->rcd->dd->verbs_dev) &&
1658                  rhf_rcv_type_err(packet->rhf) == 3))
1659                 return RHF_RCV_CONTINUE;
1660
1661         hfi1_setup_ib_header(packet);
1662         handle_eflags(packet);
1663
1664         if (unlikely(rhf_err_flags(packet->rhf)))
1665                 dd_dev_err(packet->rcd->dd,
1666                            "Unhandled error packet received. Dropping.\n");
1667
1668         return RHF_RCV_CONTINUE;
1669 }
1670
1671 int kdeth_process_expected(struct hfi1_packet *packet)
1672 {
1673         if (unlikely(hfi1_dbg_fault_packet(packet)))
1674                 return RHF_RCV_CONTINUE;
1675
1676         hfi1_setup_ib_header(packet);
1677         if (unlikely(rhf_err_flags(packet->rhf)))
1678                 handle_eflags(packet);
1679
1680         dd_dev_err(packet->rcd->dd,
1681                    "Unhandled expected packet received. Dropping.\n");
1682         return RHF_RCV_CONTINUE;
1683 }
1684
1685 int kdeth_process_eager(struct hfi1_packet *packet)
1686 {
1687         hfi1_setup_ib_header(packet);
1688         if (unlikely(rhf_err_flags(packet->rhf)))
1689                 handle_eflags(packet);
1690         if (unlikely(hfi1_dbg_fault_packet(packet)))
1691                 return RHF_RCV_CONTINUE;
1692
1693         dd_dev_err(packet->rcd->dd,
1694                    "Unhandled eager packet received. Dropping.\n");
1695         return RHF_RCV_CONTINUE;
1696 }
1697
1698 int process_receive_invalid(struct hfi1_packet *packet)
1699 {
1700         dd_dev_err(packet->rcd->dd, "Invalid packet type %d. Dropping\n",
1701                    rhf_rcv_type(packet->rhf));
1702         return RHF_RCV_CONTINUE;
1703 }
1704
1705 void seqfile_dump_rcd(struct seq_file *s, struct hfi1_ctxtdata *rcd)
1706 {
1707         struct hfi1_packet packet;
1708         struct ps_mdata mdata;
1709
1710         seq_printf(s, "Rcd %u: RcvHdr cnt %u entsize %u %s head %llu tail %llu\n",
1711                    rcd->ctxt, rcd->rcvhdrq_cnt, rcd->rcvhdrqentsize,
1712                    HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL) ?
1713                    "dma_rtail" : "nodma_rtail",
1714                    read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD) &
1715                    RCV_HDR_HEAD_HEAD_MASK,
1716                    read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_TAIL));
1717
1718         init_packet(rcd, &packet);
1719         init_ps_mdata(&mdata, &packet);
1720
1721         while (1) {
1722                 struct hfi1_devdata *dd = rcd->dd;
1723                 __le32 *rhf_addr = (__le32 *)rcd->rcvhdrq + mdata.ps_head +
1724                                          dd->rhf_offset;
1725                 struct ib_header *hdr;
1726                 u64 rhf = rhf_to_cpu(rhf_addr);
1727                 u32 etype = rhf_rcv_type(rhf), qpn;
1728                 u8 opcode;
1729                 u32 psn;
1730                 u8 lnh;
1731
1732                 if (ps_done(&mdata, rhf, rcd))
1733                         break;
1734
1735                 if (ps_skip(&mdata, rhf, rcd))
1736                         goto next;
1737
1738                 if (etype > RHF_RCV_TYPE_IB)
1739                         goto next;
1740
1741                 packet.hdr = hfi1_get_msgheader(dd, rhf_addr);
1742                 hdr = packet.hdr;
1743
1744                 lnh = be16_to_cpu(hdr->lrh[0]) & 3;
1745
1746                 if (lnh == HFI1_LRH_BTH)
1747                         packet.ohdr = &hdr->u.oth;
1748                 else if (lnh == HFI1_LRH_GRH)
1749                         packet.ohdr = &hdr->u.l.oth;
1750                 else
1751                         goto next; /* just in case */
1752
1753                 opcode = (be32_to_cpu(packet.ohdr->bth[0]) >> 24);
1754                 qpn = be32_to_cpu(packet.ohdr->bth[1]) & RVT_QPN_MASK;
1755                 psn = mask_psn(be32_to_cpu(packet.ohdr->bth[2]));
1756
1757                 seq_printf(s, "\tEnt %u: opcode 0x%x, qpn 0x%x, psn 0x%x\n",
1758                            mdata.ps_head, opcode, qpn, psn);
1759 next:
1760                 update_ps_mdata(&mdata, rcd);
1761         }
1762 }