589 lines
16 KiB
C
589 lines
16 KiB
C
/*
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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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#include "hfi.h"
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#include "verbs_txreq.h"
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#include "qp.h"
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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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* 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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*
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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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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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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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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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/* 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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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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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);
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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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* @ibp: the port the packet came in on
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* @hdr: the header of the packet
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* @rcv_flags: flags relevant to rcv processing
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* @data: the packet data
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* @tlen: the length of the packet
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* @qp: the QP for this packet.
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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;
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struct ib_other_headers *ohdr = packet->ohdr;
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u32 opcode = packet->opcode;
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u32 hdrsize = packet->hlen;
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u32 psn;
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u32 pad = packet->pad;
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struct ib_wc wc;
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u32 pmtu = qp->pmtu;
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struct ib_reth *reth;
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int ret;
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u8 extra_bytes = pad + packet->extra_byte + (SIZE_OF_CRC << 2);
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if (hfi1_ruc_check_hdr(ibp, packet))
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return;
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process_ecn(qp, packet);
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psn = ib_bth_get_psn(ohdr);
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/* Compare the PSN verses the expected PSN. */
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if (unlikely(cmp_psn(psn, qp->r_psn) != 0)) {
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/*
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* Handle a sequence error.
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* Silently drop any current message.
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*/
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qp->r_psn = psn;
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inv:
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if (qp->r_state == OP(SEND_FIRST) ||
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qp->r_state == OP(SEND_MIDDLE)) {
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set_bit(RVT_R_REWIND_SGE, &qp->r_aflags);
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qp->r_sge.num_sge = 0;
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} else {
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rvt_put_ss(&qp->r_sge);
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}
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qp->r_state = OP(SEND_LAST);
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switch (opcode) {
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case OP(SEND_FIRST):
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case OP(SEND_ONLY):
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case OP(SEND_ONLY_WITH_IMMEDIATE):
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goto send_first;
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case OP(RDMA_WRITE_FIRST):
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case OP(RDMA_WRITE_ONLY):
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case OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE):
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goto rdma_first;
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default:
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goto drop;
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}
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}
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/* Check for opcode sequence errors. */
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switch (qp->r_state) {
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case OP(SEND_FIRST):
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case OP(SEND_MIDDLE):
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if (opcode == OP(SEND_MIDDLE) ||
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opcode == OP(SEND_LAST) ||
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opcode == OP(SEND_LAST_WITH_IMMEDIATE))
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break;
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goto inv;
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case OP(RDMA_WRITE_FIRST):
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case OP(RDMA_WRITE_MIDDLE):
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if (opcode == OP(RDMA_WRITE_MIDDLE) ||
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opcode == OP(RDMA_WRITE_LAST) ||
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opcode == OP(RDMA_WRITE_LAST_WITH_IMMEDIATE))
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break;
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goto inv;
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default:
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if (opcode == OP(SEND_FIRST) ||
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opcode == OP(SEND_ONLY) ||
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opcode == OP(SEND_ONLY_WITH_IMMEDIATE) ||
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opcode == OP(RDMA_WRITE_FIRST) ||
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opcode == OP(RDMA_WRITE_ONLY) ||
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opcode == OP(RDMA_WRITE_ONLY_WITH_IMMEDIATE))
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break;
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goto inv;
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}
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if (qp->state == IB_QPS_RTR && !(qp->r_flags & RVT_R_COMM_EST))
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rvt_comm_est(qp);
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/* OK, process the packet. */
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switch (opcode) {
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case OP(SEND_FIRST):
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case OP(SEND_ONLY):
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case OP(SEND_ONLY_WITH_IMMEDIATE):
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send_first:
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if (test_and_clear_bit(RVT_R_REWIND_SGE, &qp->r_aflags)) {
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qp->r_sge = qp->s_rdma_read_sge;
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} else {
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ret = rvt_get_rwqe(qp, false);
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if (ret < 0)
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goto op_err;
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if (!ret)
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goto drop;
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/*
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* qp->s_rdma_read_sge will be the owner
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* of the mr references.
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*/
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qp->s_rdma_read_sge = qp->r_sge;
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}
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qp->r_rcv_len = 0;
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if (opcode == OP(SEND_ONLY))
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goto no_immediate_data;
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else if (opcode == OP(SEND_ONLY_WITH_IMMEDIATE))
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goto send_last_imm;
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fallthrough;
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case OP(SEND_MIDDLE):
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/* Check for invalid length PMTU or posted rwqe len. */
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/*
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* There will be no padding for 9B packet but 16B packets
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* will come in with some padding since we always add
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* CRC and LT bytes which will need to be flit aligned
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*/
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if (unlikely(tlen != (hdrsize + pmtu + extra_bytes)))
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goto rewind;
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qp->r_rcv_len += pmtu;
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if (unlikely(qp->r_rcv_len > qp->r_len))
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goto rewind;
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rvt_copy_sge(qp, &qp->r_sge, data, pmtu, false, false);
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break;
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case OP(SEND_LAST_WITH_IMMEDIATE):
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send_last_imm:
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wc.ex.imm_data = ohdr->u.imm_data;
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wc.wc_flags = IB_WC_WITH_IMM;
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goto send_last;
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case OP(SEND_LAST):
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no_immediate_data:
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wc.ex.imm_data = 0;
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wc.wc_flags = 0;
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send_last:
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/* Check for invalid length. */
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/* LAST len should be >= 1 */
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if (unlikely(tlen < (hdrsize + extra_bytes)))
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goto rewind;
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/* Don't count the CRC. */
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tlen -= (hdrsize + extra_bytes);
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wc.byte_len = tlen + qp->r_rcv_len;
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if (unlikely(wc.byte_len > qp->r_len))
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goto rewind;
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wc.opcode = IB_WC_RECV;
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rvt_copy_sge(qp, &qp->r_sge, data, tlen, false, false);
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rvt_put_ss(&qp->s_rdma_read_sge);
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last_imm:
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wc.wr_id = qp->r_wr_id;
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wc.status = IB_WC_SUCCESS;
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wc.qp = &qp->ibqp;
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wc.src_qp = qp->remote_qpn;
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wc.slid = rdma_ah_get_dlid(&qp->remote_ah_attr) & U16_MAX;
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/*
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|
* 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);
|
|
}
|