1 /* 2 * Copyright(c) 2015, 2016 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 "hfi.h" 49 #include "verbs_txreq.h" 50 #include "qp.h" 51 52 /* cut down ridiculously long IB macro names */ 53 #define OP(x) UC_OP(x) 54 55 /** 56 * hfi1_make_uc_req - construct a request packet (SEND, RDMA write) 57 * @qp: a pointer to the QP 58 * 59 * Assume s_lock is held. 60 * 61 * Return 1 if constructed; otherwise, return 0. 62 */ 63 int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps) 64 { 65 struct hfi1_qp_priv *priv = qp->priv; 66 struct ib_other_headers *ohdr; 67 struct rvt_swqe *wqe; 68 u32 hwords; 69 u32 bth0 = 0; 70 u32 len; 71 u32 pmtu = qp->pmtu; 72 int middle = 0; 73 74 ps->s_txreq = get_txreq(ps->dev, qp); 75 if (IS_ERR(ps->s_txreq)) 76 goto bail_no_tx; 77 78 if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_SEND_OK)) { 79 if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND)) 80 goto bail; 81 /* We are in the error state, flush the work request. */ 82 smp_read_barrier_depends(); /* see post_one_send() */ 83 if (qp->s_last == ACCESS_ONCE(qp->s_head)) 84 goto bail; 85 /* If DMAs are in progress, we can't flush immediately. */ 86 if (iowait_sdma_pending(&priv->s_iowait)) { 87 qp->s_flags |= RVT_S_WAIT_DMA; 88 goto bail; 89 } 90 clear_ahg(qp); 91 wqe = rvt_get_swqe_ptr(qp, qp->s_last); 92 hfi1_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); 93 goto done_free_tx; 94 } 95 96 ps->s_txreq->phdr.hdr.hdr_type = priv->hdr_type; 97 if (priv->hdr_type == HFI1_PKT_TYPE_9B) { 98 /* header size in 32-bit words LRH+BTH = (8+12)/4. */ 99 hwords = 5; 100 if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) 101 ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth; 102 else 103 ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth; 104 } else { 105 /* header size in 32-bit words 16B LRH+BTH = (16+12)/4. */ 106 hwords = 7; 107 if ((rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) && 108 (hfi1_check_mcast(rdma_ah_get_dlid(&qp->remote_ah_attr)))) 109 ohdr = &ps->s_txreq->phdr.hdr.opah.u.l.oth; 110 else 111 ohdr = &ps->s_txreq->phdr.hdr.opah.u.oth; 112 } 113 114 /* Get the next send request. */ 115 wqe = rvt_get_swqe_ptr(qp, qp->s_cur); 116 qp->s_wqe = NULL; 117 switch (qp->s_state) { 118 default: 119 if (!(ib_rvt_state_ops[qp->state] & 120 RVT_PROCESS_NEXT_SEND_OK)) 121 goto bail; 122 /* Check if send work queue is empty. */ 123 smp_read_barrier_depends(); /* see post_one_send() */ 124 if (qp->s_cur == ACCESS_ONCE(qp->s_head)) { 125 clear_ahg(qp); 126 goto bail; 127 } 128 /* 129 * Local operations are processed immediately 130 * after all prior requests have completed. 131 */ 132 if (wqe->wr.opcode == IB_WR_REG_MR || 133 wqe->wr.opcode == IB_WR_LOCAL_INV) { 134 int local_ops = 0; 135 int err = 0; 136 137 if (qp->s_last != qp->s_cur) 138 goto bail; 139 if (++qp->s_cur == qp->s_size) 140 qp->s_cur = 0; 141 if (!(wqe->wr.send_flags & RVT_SEND_COMPLETION_ONLY)) { 142 err = rvt_invalidate_rkey( 143 qp, wqe->wr.ex.invalidate_rkey); 144 local_ops = 1; 145 } 146 hfi1_send_complete(qp, wqe, err ? IB_WC_LOC_PROT_ERR 147 : IB_WC_SUCCESS); 148 if (local_ops) 149 atomic_dec(&qp->local_ops_pending); 150 qp->s_hdrwords = 0; 151 goto done_free_tx; 152 } 153 /* 154 * Start a new request. 155 */ 156 qp->s_psn = wqe->psn; 157 qp->s_sge.sge = wqe->sg_list[0]; 158 qp->s_sge.sg_list = wqe->sg_list + 1; 159 qp->s_sge.num_sge = wqe->wr.num_sge; 160 qp->s_sge.total_len = wqe->length; 161 len = wqe->length; 162 qp->s_len = len; 163 switch (wqe->wr.opcode) { 164 case IB_WR_SEND: 165 case IB_WR_SEND_WITH_IMM: 166 if (len > pmtu) { 167 qp->s_state = OP(SEND_FIRST); 168 len = pmtu; 169 break; 170 } 171 if (wqe->wr.opcode == IB_WR_SEND) { 172 qp->s_state = OP(SEND_ONLY); 173 } else { 174 qp->s_state = 175 OP(SEND_ONLY_WITH_IMMEDIATE); 176 /* Immediate data comes after the BTH */ 177 ohdr->u.imm_data = wqe->wr.ex.imm_data; 178 hwords += 1; 179 } 180 if (wqe->wr.send_flags & IB_SEND_SOLICITED) 181 bth0 |= IB_BTH_SOLICITED; 182 qp->s_wqe = wqe; 183 if (++qp->s_cur >= qp->s_size) 184 qp->s_cur = 0; 185 break; 186 187 case IB_WR_RDMA_WRITE: 188 case IB_WR_RDMA_WRITE_WITH_IMM: 189 ohdr->u.rc.reth.vaddr = 190 cpu_to_be64(wqe->rdma_wr.remote_addr); 191 ohdr->u.rc.reth.rkey = 192 cpu_to_be32(wqe->rdma_wr.rkey); 193 ohdr->u.rc.reth.length = cpu_to_be32(len); 194 hwords += sizeof(struct ib_reth) / 4; 195 if (len > pmtu) { 196 qp->s_state = OP(RDMA_WRITE_FIRST); 197 len = pmtu; 198 break; 199 } 200 if (wqe->wr.opcode == IB_WR_RDMA_WRITE) { 201 qp->s_state = OP(RDMA_WRITE_ONLY); 202 } else { 203 qp->s_state = 204 OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE); 205 /* Immediate data comes after the RETH */ 206 ohdr->u.rc.imm_data = wqe->wr.ex.imm_data; 207 hwords += 1; 208 if (wqe->wr.send_flags & IB_SEND_SOLICITED) 209 bth0 |= IB_BTH_SOLICITED; 210 } 211 qp->s_wqe = wqe; 212 if (++qp->s_cur >= qp->s_size) 213 qp->s_cur = 0; 214 break; 215 216 default: 217 goto bail; 218 } 219 break; 220 221 case OP(SEND_FIRST): 222 qp->s_state = OP(SEND_MIDDLE); 223 /* FALLTHROUGH */ 224 case OP(SEND_MIDDLE): 225 len = qp->s_len; 226 if (len > pmtu) { 227 len = pmtu; 228 middle = HFI1_CAP_IS_KSET(SDMA_AHG); 229 break; 230 } 231 if (wqe->wr.opcode == IB_WR_SEND) { 232 qp->s_state = OP(SEND_LAST); 233 } else { 234 qp->s_state = OP(SEND_LAST_WITH_IMMEDIATE); 235 /* Immediate data comes after the BTH */ 236 ohdr->u.imm_data = wqe->wr.ex.imm_data; 237 hwords += 1; 238 } 239 if (wqe->wr.send_flags & IB_SEND_SOLICITED) 240 bth0 |= IB_BTH_SOLICITED; 241 qp->s_wqe = wqe; 242 if (++qp->s_cur >= qp->s_size) 243 qp->s_cur = 0; 244 break; 245 246 case OP(RDMA_WRITE_FIRST): 247 qp->s_state = OP(RDMA_WRITE_MIDDLE); 248 /* FALLTHROUGH */ 249 case OP(RDMA_WRITE_MIDDLE): 250 len = qp->s_len; 251 if (len > pmtu) { 252 len = pmtu; 253 middle = HFI1_CAP_IS_KSET(SDMA_AHG); 254 break; 255 } 256 if (wqe->wr.opcode == IB_WR_RDMA_WRITE) { 257 qp->s_state = OP(RDMA_WRITE_LAST); 258 } else { 259 qp->s_state = 260 OP(RDMA_WRITE_LAST_WITH_IMMEDIATE); 261 /* Immediate data comes after the BTH */ 262 ohdr->u.imm_data = wqe->wr.ex.imm_data; 263 hwords += 1; 264 if (wqe->wr.send_flags & IB_SEND_SOLICITED) 265 bth0 |= IB_BTH_SOLICITED; 266 } 267 qp->s_wqe = wqe; 268 if (++qp->s_cur >= qp->s_size) 269 qp->s_cur = 0; 270 break; 271 } 272 qp->s_len -= len; 273 qp->s_hdrwords = hwords; 274 ps->s_txreq->sde = priv->s_sde; 275 ps->s_txreq->ss = &qp->s_sge; 276 ps->s_txreq->s_cur_size = len; 277 hfi1_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24), 278 mask_psn(qp->s_psn++), middle, ps); 279 /* pbc */ 280 ps->s_txreq->hdr_dwords = qp->s_hdrwords + 2; 281 return 1; 282 283 done_free_tx: 284 hfi1_put_txreq(ps->s_txreq); 285 ps->s_txreq = NULL; 286 return 1; 287 288 bail: 289 hfi1_put_txreq(ps->s_txreq); 290 291 bail_no_tx: 292 ps->s_txreq = NULL; 293 qp->s_flags &= ~RVT_S_BUSY; 294 qp->s_hdrwords = 0; 295 return 0; 296 } 297 298 /** 299 * hfi1_uc_rcv - handle an incoming UC packet 300 * @ibp: the port the packet came in on 301 * @hdr: the header of the packet 302 * @rcv_flags: flags relevant to rcv processing 303 * @data: the packet data 304 * @tlen: the length of the packet 305 * @qp: the QP for this packet. 306 * 307 * This is called from qp_rcv() to process an incoming UC packet 308 * for the given QP. 309 * Called at interrupt level. 310 */ 311 void hfi1_uc_rcv(struct hfi1_packet *packet) 312 { 313 struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd); 314 void *data = packet->payload; 315 u32 tlen = packet->tlen; 316 struct rvt_qp *qp = packet->qp; 317 struct ib_other_headers *ohdr = packet->ohdr; 318 u32 opcode = packet->opcode; 319 u32 hdrsize = packet->hlen; 320 u32 psn; 321 u32 pad = packet->pad; 322 struct ib_wc wc; 323 u32 pmtu = qp->pmtu; 324 struct ib_reth *reth; 325 int ret; 326 u8 extra_bytes = pad + packet->extra_byte + (SIZE_OF_CRC << 2); 327 328 if (hfi1_ruc_check_hdr(ibp, packet)) 329 return; 330 331 process_ecn(qp, packet, true); 332 333 psn = ib_bth_get_psn(ohdr); 334 /* Compare the PSN verses the expected PSN. */ 335 if (unlikely(cmp_psn(psn, qp->r_psn) != 0)) { 336 /* 337 * Handle a sequence error. 338 * Silently drop any current message. 339 */ 340 qp->r_psn = psn; 341 inv: 342 if (qp->r_state == OP(SEND_FIRST) || 343 qp->r_state == OP(SEND_MIDDLE)) { 344 set_bit(RVT_R_REWIND_SGE, &qp->r_aflags); 345 qp->r_sge.num_sge = 0; 346 } else { 347 rvt_put_ss(&qp->r_sge); 348 } 349 qp->r_state = OP(SEND_LAST); 350 switch (opcode) { 351 case OP(SEND_FIRST): 352 case OP(SEND_ONLY): 353 case OP(SEND_ONLY_WITH_IMMEDIATE): 354 goto send_first; 355 356 case OP(RDMA_WRITE_FIRST): 357 case OP(RDMA_WRITE_ONLY): 358 case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE): 359 goto rdma_first; 360 361 default: 362 goto drop; 363 } 364 } 365 366 /* Check for opcode sequence errors. */ 367 switch (qp->r_state) { 368 case OP(SEND_FIRST): 369 case OP(SEND_MIDDLE): 370 if (opcode == OP(SEND_MIDDLE) || 371 opcode == OP(SEND_LAST) || 372 opcode == OP(SEND_LAST_WITH_IMMEDIATE)) 373 break; 374 goto inv; 375 376 case OP(RDMA_WRITE_FIRST): 377 case OP(RDMA_WRITE_MIDDLE): 378 if (opcode == OP(RDMA_WRITE_MIDDLE) || 379 opcode == OP(RDMA_WRITE_LAST) || 380 opcode == OP(RDMA_WRITE_LAST_WITH_IMMEDIATE)) 381 break; 382 goto inv; 383 384 default: 385 if (opcode == OP(SEND_FIRST) || 386 opcode == OP(SEND_ONLY) || 387 opcode == OP(SEND_ONLY_WITH_IMMEDIATE) || 388 opcode == OP(RDMA_WRITE_FIRST) || 389 opcode == OP(RDMA_WRITE_ONLY) || 390 opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE)) 391 break; 392 goto inv; 393 } 394 395 if (qp->state == IB_QPS_RTR && !(qp->r_flags & RVT_R_COMM_EST)) 396 rvt_comm_est(qp); 397 398 /* OK, process the packet. */ 399 switch (opcode) { 400 case OP(SEND_FIRST): 401 case OP(SEND_ONLY): 402 case OP(SEND_ONLY_WITH_IMMEDIATE): 403 send_first: 404 if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) { 405 qp->r_sge = qp->s_rdma_read_sge; 406 } else { 407 ret = hfi1_rvt_get_rwqe(qp, 0); 408 if (ret < 0) 409 goto op_err; 410 if (!ret) 411 goto drop; 412 /* 413 * qp->s_rdma_read_sge will be the owner 414 * of the mr references. 415 */ 416 qp->s_rdma_read_sge = qp->r_sge; 417 } 418 qp->r_rcv_len = 0; 419 if (opcode == OP(SEND_ONLY)) 420 goto no_immediate_data; 421 else if (opcode == OP(SEND_ONLY_WITH_IMMEDIATE)) 422 goto send_last_imm; 423 /* FALLTHROUGH */ 424 case OP(SEND_MIDDLE): 425 /* Check for invalid length PMTU or posted rwqe len. */ 426 /* 427 * There will be no padding for 9B packet but 16B packets 428 * will come in with some padding since we always add 429 * CRC and LT bytes which will need to be flit aligned 430 */ 431 if (unlikely(tlen != (hdrsize + pmtu + extra_bytes))) 432 goto rewind; 433 qp->r_rcv_len += pmtu; 434 if (unlikely(qp->r_rcv_len > qp->r_len)) 435 goto rewind; 436 hfi1_copy_sge(&qp->r_sge, data, pmtu, false, false); 437 break; 438 439 case OP(SEND_LAST_WITH_IMMEDIATE): 440 send_last_imm: 441 wc.ex.imm_data = ohdr->u.imm_data; 442 wc.wc_flags = IB_WC_WITH_IMM; 443 goto send_last; 444 case OP(SEND_LAST): 445 no_immediate_data: 446 wc.ex.imm_data = 0; 447 wc.wc_flags = 0; 448 send_last: 449 /* Check for invalid length. */ 450 /* LAST len should be >= 1 */ 451 if (unlikely(tlen < (hdrsize + extra_bytes))) 452 goto rewind; 453 /* Don't count the CRC. */ 454 tlen -= (hdrsize + extra_bytes); 455 wc.byte_len = tlen + qp->r_rcv_len; 456 if (unlikely(wc.byte_len > qp->r_len)) 457 goto rewind; 458 wc.opcode = IB_WC_RECV; 459 hfi1_copy_sge(&qp->r_sge, data, tlen, false, false); 460 rvt_put_ss(&qp->s_rdma_read_sge); 461 last_imm: 462 wc.wr_id = qp->r_wr_id; 463 wc.status = IB_WC_SUCCESS; 464 wc.qp = &qp->ibqp; 465 wc.src_qp = qp->remote_qpn; 466 wc.slid = rdma_ah_get_dlid(&qp->remote_ah_attr); 467 /* 468 * It seems that IB mandates the presence of an SL in a 469 * work completion only for the UD transport (see section 470 * 11.4.2 of IBTA Vol. 1). 471 * 472 * However, the way the SL is chosen below is consistent 473 * with the way that IB/qib works and is trying avoid 474 * introducing incompatibilities. 475 * 476 * See also OPA Vol. 1, section 9.7.6, and table 9-17. 477 */ 478 wc.sl = rdma_ah_get_sl(&qp->remote_ah_attr); 479 /* zero fields that are N/A */ 480 wc.vendor_err = 0; 481 wc.pkey_index = 0; 482 wc.dlid_path_bits = 0; 483 wc.port_num = 0; 484 /* Signal completion event if the solicited bit is set. */ 485 rvt_cq_enter(ibcq_to_rvtcq(qp->ibqp.recv_cq), &wc, 486 (ohdr->bth[0] & 487 cpu_to_be32(IB_BTH_SOLICITED)) != 0); 488 break; 489 490 case OP(RDMA_WRITE_FIRST): 491 case OP(RDMA_WRITE_ONLY): 492 case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE): /* consume RWQE */ 493 rdma_first: 494 if (unlikely(!(qp->qp_access_flags & 495 IB_ACCESS_REMOTE_WRITE))) { 496 goto drop; 497 } 498 reth = &ohdr->u.rc.reth; 499 qp->r_len = be32_to_cpu(reth->length); 500 qp->r_rcv_len = 0; 501 qp->r_sge.sg_list = NULL; 502 if (qp->r_len != 0) { 503 u32 rkey = be32_to_cpu(reth->rkey); 504 u64 vaddr = be64_to_cpu(reth->vaddr); 505 int ok; 506 507 /* Check rkey */ 508 ok = rvt_rkey_ok(qp, &qp->r_sge.sge, qp->r_len, 509 vaddr, rkey, IB_ACCESS_REMOTE_WRITE); 510 if (unlikely(!ok)) 511 goto drop; 512 qp->r_sge.num_sge = 1; 513 } else { 514 qp->r_sge.num_sge = 0; 515 qp->r_sge.sge.mr = NULL; 516 qp->r_sge.sge.vaddr = NULL; 517 qp->r_sge.sge.length = 0; 518 qp->r_sge.sge.sge_length = 0; 519 } 520 if (opcode == OP(RDMA_WRITE_ONLY)) { 521 goto rdma_last; 522 } else if (opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE)) { 523 wc.ex.imm_data = ohdr->u.rc.imm_data; 524 goto rdma_last_imm; 525 } 526 /* FALLTHROUGH */ 527 case OP(RDMA_WRITE_MIDDLE): 528 /* Check for invalid length PMTU or posted rwqe len. */ 529 if (unlikely(tlen != (hdrsize + pmtu + 4))) 530 goto drop; 531 qp->r_rcv_len += pmtu; 532 if (unlikely(qp->r_rcv_len > qp->r_len)) 533 goto drop; 534 hfi1_copy_sge(&qp->r_sge, data, pmtu, true, false); 535 break; 536 537 case OP(RDMA_WRITE_LAST_WITH_IMMEDIATE): 538 wc.ex.imm_data = ohdr->u.imm_data; 539 rdma_last_imm: 540 wc.wc_flags = IB_WC_WITH_IMM; 541 542 /* Check for invalid length. */ 543 /* LAST len should be >= 1 */ 544 if (unlikely(tlen < (hdrsize + pad + 4))) 545 goto drop; 546 /* Don't count the CRC. */ 547 tlen -= (hdrsize + extra_bytes); 548 if (unlikely(tlen + qp->r_rcv_len != qp->r_len)) 549 goto drop; 550 if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) { 551 rvt_put_ss(&qp->s_rdma_read_sge); 552 } else { 553 ret = hfi1_rvt_get_rwqe(qp, 1); 554 if (ret < 0) 555 goto op_err; 556 if (!ret) 557 goto drop; 558 } 559 wc.byte_len = qp->r_len; 560 wc.opcode = IB_WC_RECV_RDMA_WITH_IMM; 561 hfi1_copy_sge(&qp->r_sge, data, tlen, true, false); 562 rvt_put_ss(&qp->r_sge); 563 goto last_imm; 564 565 case OP(RDMA_WRITE_LAST): 566 rdma_last: 567 /* Check for invalid length. */ 568 /* LAST len should be >= 1 */ 569 if (unlikely(tlen < (hdrsize + pad + 4))) 570 goto drop; 571 /* Don't count the CRC. */ 572 tlen -= (hdrsize + extra_bytes); 573 if (unlikely(tlen + qp->r_rcv_len != qp->r_len)) 574 goto drop; 575 hfi1_copy_sge(&qp->r_sge, data, tlen, true, false); 576 rvt_put_ss(&qp->r_sge); 577 break; 578 579 default: 580 /* Drop packet for unknown opcodes. */ 581 goto drop; 582 } 583 qp->r_psn++; 584 qp->r_state = opcode; 585 return; 586 587 rewind: 588 set_bit(RVT_R_REWIND_SGE, &qp->r_aflags); 589 qp->r_sge.num_sge = 0; 590 drop: 591 ibp->rvp.n_pkt_drops++; 592 return; 593 594 op_err: 595 rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR); 596 } 597