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584 lines
16 KiB
584 lines
16 KiB
/* |
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* Copyright(c) 2015 - 2018 Intel Corporation. |
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* |
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* This file is provided under a dual BSD/GPLv2 license. When using or |
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* redistributing this file, you may do so under either license. |
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* |
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* GPL LICENSE SUMMARY |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of version 2 of the GNU General Public License as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* BSD LICENSE |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* - Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* - Neither the name of Intel Corporation nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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|
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#include "hfi.h" |
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#include "verbs_txreq.h" |
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#include "qp.h" |
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|
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/* cut down ridiculously long IB macro names */ |
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#define OP(x) UC_OP(x) |
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|
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/** |
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* hfi1_make_uc_req - construct a request packet (SEND, RDMA write) |
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* @qp: a pointer to the QP |
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* @ps: the current packet state |
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* |
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* Assume s_lock is held. |
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* |
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* Return 1 if constructed; otherwise, return 0. |
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*/ |
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int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps) |
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{ |
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struct hfi1_qp_priv *priv = qp->priv; |
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struct ib_other_headers *ohdr; |
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struct rvt_swqe *wqe; |
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u32 hwords; |
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u32 bth0 = 0; |
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u32 len; |
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u32 pmtu = qp->pmtu; |
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int middle = 0; |
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|
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ps->s_txreq = get_txreq(ps->dev, qp); |
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if (!ps->s_txreq) |
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goto bail_no_tx; |
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|
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if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_SEND_OK)) { |
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if (!(ib_rvt_state_ops[qp->state] & RVT_FLUSH_SEND)) |
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goto bail; |
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/* We are in the error state, flush the work request. */ |
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if (qp->s_last == READ_ONCE(qp->s_head)) |
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goto bail; |
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/* If DMAs are in progress, we can't flush immediately. */ |
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if (iowait_sdma_pending(&priv->s_iowait)) { |
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qp->s_flags |= RVT_S_WAIT_DMA; |
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goto bail; |
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} |
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clear_ahg(qp); |
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wqe = rvt_get_swqe_ptr(qp, qp->s_last); |
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rvt_send_complete(qp, wqe, IB_WC_WR_FLUSH_ERR); |
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goto done_free_tx; |
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} |
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|
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if (priv->hdr_type == HFI1_PKT_TYPE_9B) { |
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/* header size in 32-bit words LRH+BTH = (8+12)/4. */ |
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hwords = 5; |
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if (rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) |
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ohdr = &ps->s_txreq->phdr.hdr.ibh.u.l.oth; |
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else |
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ohdr = &ps->s_txreq->phdr.hdr.ibh.u.oth; |
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} else { |
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/* header size in 32-bit words 16B LRH+BTH = (16+12)/4. */ |
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hwords = 7; |
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if ((rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH) && |
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(hfi1_check_mcast(rdma_ah_get_dlid(&qp->remote_ah_attr)))) |
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ohdr = &ps->s_txreq->phdr.hdr.opah.u.l.oth; |
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else |
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ohdr = &ps->s_txreq->phdr.hdr.opah.u.oth; |
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} |
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|
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/* Get the next send request. */ |
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wqe = rvt_get_swqe_ptr(qp, qp->s_cur); |
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qp->s_wqe = NULL; |
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switch (qp->s_state) { |
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default: |
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if (!(ib_rvt_state_ops[qp->state] & |
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RVT_PROCESS_NEXT_SEND_OK)) |
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goto bail; |
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/* Check if send work queue is empty. */ |
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if (qp->s_cur == READ_ONCE(qp->s_head)) { |
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clear_ahg(qp); |
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goto bail; |
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} |
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/* |
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* Local operations are processed immediately |
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* after all prior requests have completed. |
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*/ |
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if (wqe->wr.opcode == IB_WR_REG_MR || |
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wqe->wr.opcode == IB_WR_LOCAL_INV) { |
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int local_ops = 0; |
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int err = 0; |
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|
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if (qp->s_last != qp->s_cur) |
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goto bail; |
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if (++qp->s_cur == qp->s_size) |
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qp->s_cur = 0; |
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if (!(wqe->wr.send_flags & RVT_SEND_COMPLETION_ONLY)) { |
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err = rvt_invalidate_rkey( |
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qp, wqe->wr.ex.invalidate_rkey); |
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local_ops = 1; |
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} |
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rvt_send_complete(qp, wqe, err ? IB_WC_LOC_PROT_ERR |
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: IB_WC_SUCCESS); |
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if (local_ops) |
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atomic_dec(&qp->local_ops_pending); |
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goto done_free_tx; |
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} |
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/* |
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* Start a new request. |
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*/ |
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qp->s_psn = wqe->psn; |
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qp->s_sge.sge = wqe->sg_list[0]; |
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qp->s_sge.sg_list = wqe->sg_list + 1; |
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qp->s_sge.num_sge = wqe->wr.num_sge; |
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qp->s_sge.total_len = wqe->length; |
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len = wqe->length; |
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qp->s_len = len; |
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switch (wqe->wr.opcode) { |
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case IB_WR_SEND: |
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case IB_WR_SEND_WITH_IMM: |
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if (len > pmtu) { |
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qp->s_state = OP(SEND_FIRST); |
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len = pmtu; |
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break; |
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} |
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if (wqe->wr.opcode == IB_WR_SEND) { |
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qp->s_state = OP(SEND_ONLY); |
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} else { |
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qp->s_state = |
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OP(SEND_ONLY_WITH_IMMEDIATE); |
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/* Immediate data comes after the BTH */ |
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ohdr->u.imm_data = wqe->wr.ex.imm_data; |
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hwords += 1; |
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} |
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if (wqe->wr.send_flags & IB_SEND_SOLICITED) |
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bth0 |= IB_BTH_SOLICITED; |
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qp->s_wqe = wqe; |
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if (++qp->s_cur >= qp->s_size) |
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qp->s_cur = 0; |
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break; |
|
|
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case IB_WR_RDMA_WRITE: |
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case IB_WR_RDMA_WRITE_WITH_IMM: |
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ohdr->u.rc.reth.vaddr = |
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cpu_to_be64(wqe->rdma_wr.remote_addr); |
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ohdr->u.rc.reth.rkey = |
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cpu_to_be32(wqe->rdma_wr.rkey); |
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ohdr->u.rc.reth.length = cpu_to_be32(len); |
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hwords += sizeof(struct ib_reth) / 4; |
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if (len > pmtu) { |
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qp->s_state = OP(RDMA_WRITE_FIRST); |
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len = pmtu; |
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break; |
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} |
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if (wqe->wr.opcode == IB_WR_RDMA_WRITE) { |
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qp->s_state = OP(RDMA_WRITE_ONLY); |
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} else { |
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qp->s_state = |
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OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE); |
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/* Immediate data comes after the RETH */ |
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ohdr->u.rc.imm_data = wqe->wr.ex.imm_data; |
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hwords += 1; |
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if (wqe->wr.send_flags & IB_SEND_SOLICITED) |
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bth0 |= IB_BTH_SOLICITED; |
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} |
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qp->s_wqe = wqe; |
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if (++qp->s_cur >= qp->s_size) |
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qp->s_cur = 0; |
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break; |
|
|
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default: |
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goto bail; |
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} |
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break; |
|
|
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case OP(SEND_FIRST): |
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qp->s_state = OP(SEND_MIDDLE); |
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fallthrough; |
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case OP(SEND_MIDDLE): |
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len = qp->s_len; |
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if (len > pmtu) { |
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len = pmtu; |
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middle = HFI1_CAP_IS_KSET(SDMA_AHG); |
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break; |
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} |
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if (wqe->wr.opcode == IB_WR_SEND) { |
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qp->s_state = OP(SEND_LAST); |
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} else { |
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qp->s_state = OP(SEND_LAST_WITH_IMMEDIATE); |
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/* Immediate data comes after the BTH */ |
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ohdr->u.imm_data = wqe->wr.ex.imm_data; |
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hwords += 1; |
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} |
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if (wqe->wr.send_flags & IB_SEND_SOLICITED) |
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bth0 |= IB_BTH_SOLICITED; |
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qp->s_wqe = wqe; |
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if (++qp->s_cur >= qp->s_size) |
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qp->s_cur = 0; |
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break; |
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|
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case OP(RDMA_WRITE_FIRST): |
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qp->s_state = OP(RDMA_WRITE_MIDDLE); |
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fallthrough; |
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case OP(RDMA_WRITE_MIDDLE): |
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len = qp->s_len; |
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if (len > pmtu) { |
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len = pmtu; |
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middle = HFI1_CAP_IS_KSET(SDMA_AHG); |
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break; |
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} |
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if (wqe->wr.opcode == IB_WR_RDMA_WRITE) { |
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qp->s_state = OP(RDMA_WRITE_LAST); |
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} else { |
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qp->s_state = |
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OP(RDMA_WRITE_LAST_WITH_IMMEDIATE); |
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/* Immediate data comes after the BTH */ |
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ohdr->u.imm_data = wqe->wr.ex.imm_data; |
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hwords += 1; |
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if (wqe->wr.send_flags & IB_SEND_SOLICITED) |
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bth0 |= IB_BTH_SOLICITED; |
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} |
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qp->s_wqe = wqe; |
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if (++qp->s_cur >= qp->s_size) |
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qp->s_cur = 0; |
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break; |
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} |
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qp->s_len -= len; |
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ps->s_txreq->hdr_dwords = hwords; |
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ps->s_txreq->sde = priv->s_sde; |
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ps->s_txreq->ss = &qp->s_sge; |
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ps->s_txreq->s_cur_size = len; |
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hfi1_make_ruc_header(qp, ohdr, bth0 | (qp->s_state << 24), |
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qp->remote_qpn, mask_psn(qp->s_psn++), |
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middle, ps); |
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return 1; |
|
|
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done_free_tx: |
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hfi1_put_txreq(ps->s_txreq); |
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ps->s_txreq = NULL; |
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return 1; |
|
|
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bail: |
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hfi1_put_txreq(ps->s_txreq); |
|
|
|
bail_no_tx: |
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ps->s_txreq = NULL; |
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qp->s_flags &= ~RVT_S_BUSY; |
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return 0; |
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} |
|
|
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/** |
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* hfi1_uc_rcv - handle an incoming UC packet |
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* @packet: the packet structure |
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* |
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* This is called from qp_rcv() to process an incoming UC packet |
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* for the given QP. |
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* Called at interrupt level. |
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*/ |
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void hfi1_uc_rcv(struct hfi1_packet *packet) |
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{ |
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struct hfi1_ibport *ibp = rcd_to_iport(packet->rcd); |
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void *data = packet->payload; |
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u32 tlen = packet->tlen; |
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struct rvt_qp *qp = packet->qp; |
|
struct ib_other_headers *ohdr = packet->ohdr; |
|
u32 opcode = packet->opcode; |
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u32 hdrsize = packet->hlen; |
|
u32 psn; |
|
u32 pad = packet->pad; |
|
struct ib_wc wc; |
|
u32 pmtu = qp->pmtu; |
|
struct ib_reth *reth; |
|
int ret; |
|
u8 extra_bytes = pad + packet->extra_byte + (SIZE_OF_CRC << 2); |
|
|
|
if (hfi1_ruc_check_hdr(ibp, packet)) |
|
return; |
|
|
|
process_ecn(qp, packet); |
|
|
|
psn = ib_bth_get_psn(ohdr); |
|
/* Compare the PSN verses the expected PSN. */ |
|
if (unlikely(cmp_psn(psn, qp->r_psn) != 0)) { |
|
/* |
|
* Handle a sequence error. |
|
* Silently drop any current message. |
|
*/ |
|
qp->r_psn = psn; |
|
inv: |
|
if (qp->r_state == OP(SEND_FIRST) || |
|
qp->r_state == OP(SEND_MIDDLE)) { |
|
set_bit(RVT_R_REWIND_SGE, &qp->r_aflags); |
|
qp->r_sge.num_sge = 0; |
|
} else { |
|
rvt_put_ss(&qp->r_sge); |
|
} |
|
qp->r_state = OP(SEND_LAST); |
|
switch (opcode) { |
|
case OP(SEND_FIRST): |
|
case OP(SEND_ONLY): |
|
case OP(SEND_ONLY_WITH_IMMEDIATE): |
|
goto send_first; |
|
|
|
case OP(RDMA_WRITE_FIRST): |
|
case OP(RDMA_WRITE_ONLY): |
|
case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE): |
|
goto rdma_first; |
|
|
|
default: |
|
goto drop; |
|
} |
|
} |
|
|
|
/* Check for opcode sequence errors. */ |
|
switch (qp->r_state) { |
|
case OP(SEND_FIRST): |
|
case OP(SEND_MIDDLE): |
|
if (opcode == OP(SEND_MIDDLE) || |
|
opcode == OP(SEND_LAST) || |
|
opcode == OP(SEND_LAST_WITH_IMMEDIATE)) |
|
break; |
|
goto inv; |
|
|
|
case OP(RDMA_WRITE_FIRST): |
|
case OP(RDMA_WRITE_MIDDLE): |
|
if (opcode == OP(RDMA_WRITE_MIDDLE) || |
|
opcode == OP(RDMA_WRITE_LAST) || |
|
opcode == OP(RDMA_WRITE_LAST_WITH_IMMEDIATE)) |
|
break; |
|
goto inv; |
|
|
|
default: |
|
if (opcode == OP(SEND_FIRST) || |
|
opcode == OP(SEND_ONLY) || |
|
opcode == OP(SEND_ONLY_WITH_IMMEDIATE) || |
|
opcode == OP(RDMA_WRITE_FIRST) || |
|
opcode == OP(RDMA_WRITE_ONLY) || |
|
opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE)) |
|
break; |
|
goto inv; |
|
} |
|
|
|
if (qp->state == IB_QPS_RTR && !(qp->r_flags & RVT_R_COMM_EST)) |
|
rvt_comm_est(qp); |
|
|
|
/* OK, process the packet. */ |
|
switch (opcode) { |
|
case OP(SEND_FIRST): |
|
case OP(SEND_ONLY): |
|
case OP(SEND_ONLY_WITH_IMMEDIATE): |
|
send_first: |
|
if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) { |
|
qp->r_sge = qp->s_rdma_read_sge; |
|
} else { |
|
ret = rvt_get_rwqe(qp, false); |
|
if (ret < 0) |
|
goto op_err; |
|
if (!ret) |
|
goto drop; |
|
/* |
|
* qp->s_rdma_read_sge will be the owner |
|
* of the mr references. |
|
*/ |
|
qp->s_rdma_read_sge = qp->r_sge; |
|
} |
|
qp->r_rcv_len = 0; |
|
if (opcode == OP(SEND_ONLY)) |
|
goto no_immediate_data; |
|
else if (opcode == OP(SEND_ONLY_WITH_IMMEDIATE)) |
|
goto send_last_imm; |
|
fallthrough; |
|
case OP(SEND_MIDDLE): |
|
/* Check for invalid length PMTU or posted rwqe len. */ |
|
/* |
|
* There will be no padding for 9B packet but 16B packets |
|
* will come in with some padding since we always add |
|
* CRC and LT bytes which will need to be flit aligned |
|
*/ |
|
if (unlikely(tlen != (hdrsize + pmtu + extra_bytes))) |
|
goto rewind; |
|
qp->r_rcv_len += pmtu; |
|
if (unlikely(qp->r_rcv_len > qp->r_len)) |
|
goto rewind; |
|
rvt_copy_sge(qp, &qp->r_sge, data, pmtu, false, false); |
|
break; |
|
|
|
case OP(SEND_LAST_WITH_IMMEDIATE): |
|
send_last_imm: |
|
wc.ex.imm_data = ohdr->u.imm_data; |
|
wc.wc_flags = IB_WC_WITH_IMM; |
|
goto send_last; |
|
case OP(SEND_LAST): |
|
no_immediate_data: |
|
wc.ex.imm_data = 0; |
|
wc.wc_flags = 0; |
|
send_last: |
|
/* Check for invalid length. */ |
|
/* LAST len should be >= 1 */ |
|
if (unlikely(tlen < (hdrsize + extra_bytes))) |
|
goto rewind; |
|
/* Don't count the CRC. */ |
|
tlen -= (hdrsize + extra_bytes); |
|
wc.byte_len = tlen + qp->r_rcv_len; |
|
if (unlikely(wc.byte_len > qp->r_len)) |
|
goto rewind; |
|
wc.opcode = IB_WC_RECV; |
|
rvt_copy_sge(qp, &qp->r_sge, data, tlen, false, false); |
|
rvt_put_ss(&qp->s_rdma_read_sge); |
|
last_imm: |
|
wc.wr_id = qp->r_wr_id; |
|
wc.status = IB_WC_SUCCESS; |
|
wc.qp = &qp->ibqp; |
|
wc.src_qp = qp->remote_qpn; |
|
wc.slid = rdma_ah_get_dlid(&qp->remote_ah_attr) & U16_MAX; |
|
/* |
|
* It seems that IB mandates the presence of an SL in a |
|
* work completion only for the UD transport (see section |
|
* 11.4.2 of IBTA Vol. 1). |
|
* |
|
* However, the way the SL is chosen below is consistent |
|
* with the way that IB/qib works and is trying avoid |
|
* introducing incompatibilities. |
|
* |
|
* See also OPA Vol. 1, section 9.7.6, and table 9-17. |
|
*/ |
|
wc.sl = rdma_ah_get_sl(&qp->remote_ah_attr); |
|
/* zero fields that are N/A */ |
|
wc.vendor_err = 0; |
|
wc.pkey_index = 0; |
|
wc.dlid_path_bits = 0; |
|
wc.port_num = 0; |
|
/* Signal completion event if the solicited bit is set. */ |
|
rvt_recv_cq(qp, &wc, ib_bth_is_solicited(ohdr)); |
|
break; |
|
|
|
case OP(RDMA_WRITE_FIRST): |
|
case OP(RDMA_WRITE_ONLY): |
|
case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE): /* consume RWQE */ |
|
rdma_first: |
|
if (unlikely(!(qp->qp_access_flags & |
|
IB_ACCESS_REMOTE_WRITE))) { |
|
goto drop; |
|
} |
|
reth = &ohdr->u.rc.reth; |
|
qp->r_len = be32_to_cpu(reth->length); |
|
qp->r_rcv_len = 0; |
|
qp->r_sge.sg_list = NULL; |
|
if (qp->r_len != 0) { |
|
u32 rkey = be32_to_cpu(reth->rkey); |
|
u64 vaddr = be64_to_cpu(reth->vaddr); |
|
int ok; |
|
|
|
/* Check rkey */ |
|
ok = rvt_rkey_ok(qp, &qp->r_sge.sge, qp->r_len, |
|
vaddr, rkey, IB_ACCESS_REMOTE_WRITE); |
|
if (unlikely(!ok)) |
|
goto drop; |
|
qp->r_sge.num_sge = 1; |
|
} else { |
|
qp->r_sge.num_sge = 0; |
|
qp->r_sge.sge.mr = NULL; |
|
qp->r_sge.sge.vaddr = NULL; |
|
qp->r_sge.sge.length = 0; |
|
qp->r_sge.sge.sge_length = 0; |
|
} |
|
if (opcode == OP(RDMA_WRITE_ONLY)) { |
|
goto rdma_last; |
|
} else if (opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE)) { |
|
wc.ex.imm_data = ohdr->u.rc.imm_data; |
|
goto rdma_last_imm; |
|
} |
|
fallthrough; |
|
case OP(RDMA_WRITE_MIDDLE): |
|
/* Check for invalid length PMTU or posted rwqe len. */ |
|
if (unlikely(tlen != (hdrsize + pmtu + 4))) |
|
goto drop; |
|
qp->r_rcv_len += pmtu; |
|
if (unlikely(qp->r_rcv_len > qp->r_len)) |
|
goto drop; |
|
rvt_copy_sge(qp, &qp->r_sge, data, pmtu, true, false); |
|
break; |
|
|
|
case OP(RDMA_WRITE_LAST_WITH_IMMEDIATE): |
|
wc.ex.imm_data = ohdr->u.imm_data; |
|
rdma_last_imm: |
|
wc.wc_flags = IB_WC_WITH_IMM; |
|
|
|
/* Check for invalid length. */ |
|
/* LAST len should be >= 1 */ |
|
if (unlikely(tlen < (hdrsize + pad + 4))) |
|
goto drop; |
|
/* Don't count the CRC. */ |
|
tlen -= (hdrsize + extra_bytes); |
|
if (unlikely(tlen + qp->r_rcv_len != qp->r_len)) |
|
goto drop; |
|
if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) { |
|
rvt_put_ss(&qp->s_rdma_read_sge); |
|
} else { |
|
ret = rvt_get_rwqe(qp, true); |
|
if (ret < 0) |
|
goto op_err; |
|
if (!ret) |
|
goto drop; |
|
} |
|
wc.byte_len = qp->r_len; |
|
wc.opcode = IB_WC_RECV_RDMA_WITH_IMM; |
|
rvt_copy_sge(qp, &qp->r_sge, data, tlen, true, false); |
|
rvt_put_ss(&qp->r_sge); |
|
goto last_imm; |
|
|
|
case OP(RDMA_WRITE_LAST): |
|
rdma_last: |
|
/* Check for invalid length. */ |
|
/* LAST len should be >= 1 */ |
|
if (unlikely(tlen < (hdrsize + pad + 4))) |
|
goto drop; |
|
/* Don't count the CRC. */ |
|
tlen -= (hdrsize + extra_bytes); |
|
if (unlikely(tlen + qp->r_rcv_len != qp->r_len)) |
|
goto drop; |
|
rvt_copy_sge(qp, &qp->r_sge, data, tlen, true, false); |
|
rvt_put_ss(&qp->r_sge); |
|
break; |
|
|
|
default: |
|
/* Drop packet for unknown opcodes. */ |
|
goto drop; |
|
} |
|
qp->r_psn++; |
|
qp->r_state = opcode; |
|
return; |
|
|
|
rewind: |
|
set_bit(RVT_R_REWIND_SGE, &qp->r_aflags); |
|
qp->r_sge.num_sge = 0; |
|
drop: |
|
ibp->rvp.n_pkt_drops++; |
|
return; |
|
|
|
op_err: |
|
rvt_rc_error(qp, IB_WC_LOC_QP_OP_ERR); |
|
}
|
|
|