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967 lines
25 KiB
967 lines
25 KiB
/* |
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* Copyright(c) 2015 - 2020 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 <linux/err.h> |
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#include <linux/vmalloc.h> |
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#include <linux/hash.h> |
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#include <linux/module.h> |
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#include <linux/seq_file.h> |
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#include <rdma/rdma_vt.h> |
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#include <rdma/rdmavt_qp.h> |
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#include <rdma/ib_verbs.h> |
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|
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#include "hfi.h" |
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#include "qp.h" |
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#include "trace.h" |
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#include "verbs_txreq.h" |
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|
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unsigned int hfi1_qp_table_size = 256; |
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module_param_named(qp_table_size, hfi1_qp_table_size, uint, S_IRUGO); |
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MODULE_PARM_DESC(qp_table_size, "QP table size"); |
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|
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static void flush_tx_list(struct rvt_qp *qp); |
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static int iowait_sleep( |
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struct sdma_engine *sde, |
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struct iowait_work *wait, |
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struct sdma_txreq *stx, |
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unsigned int seq, |
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bool pkts_sent); |
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static void iowait_wakeup(struct iowait *wait, int reason); |
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static void iowait_sdma_drained(struct iowait *wait); |
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static void qp_pio_drain(struct rvt_qp *qp); |
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|
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const struct rvt_operation_params hfi1_post_parms[RVT_OPERATION_MAX] = { |
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[IB_WR_RDMA_WRITE] = { |
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.length = sizeof(struct ib_rdma_wr), |
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.qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC), |
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}, |
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[IB_WR_RDMA_READ] = { |
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.length = sizeof(struct ib_rdma_wr), |
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.qpt_support = BIT(IB_QPT_RC), |
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.flags = RVT_OPERATION_ATOMIC, |
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}, |
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[IB_WR_ATOMIC_CMP_AND_SWP] = { |
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.length = sizeof(struct ib_atomic_wr), |
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.qpt_support = BIT(IB_QPT_RC), |
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.flags = RVT_OPERATION_ATOMIC | RVT_OPERATION_ATOMIC_SGE, |
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}, |
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[IB_WR_ATOMIC_FETCH_AND_ADD] = { |
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.length = sizeof(struct ib_atomic_wr), |
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.qpt_support = BIT(IB_QPT_RC), |
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.flags = RVT_OPERATION_ATOMIC | RVT_OPERATION_ATOMIC_SGE, |
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}, |
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[IB_WR_RDMA_WRITE_WITH_IMM] = { |
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.length = sizeof(struct ib_rdma_wr), |
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.qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC), |
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}, |
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[IB_WR_SEND] = { |
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.length = sizeof(struct ib_send_wr), |
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.qpt_support = BIT(IB_QPT_UD) | BIT(IB_QPT_SMI) | BIT(IB_QPT_GSI) | |
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BIT(IB_QPT_UC) | BIT(IB_QPT_RC), |
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}, |
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[IB_WR_SEND_WITH_IMM] = { |
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.length = sizeof(struct ib_send_wr), |
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.qpt_support = BIT(IB_QPT_UD) | BIT(IB_QPT_SMI) | BIT(IB_QPT_GSI) | |
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BIT(IB_QPT_UC) | BIT(IB_QPT_RC), |
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}, |
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[IB_WR_REG_MR] = { |
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.length = sizeof(struct ib_reg_wr), |
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.qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC), |
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.flags = RVT_OPERATION_LOCAL, |
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}, |
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[IB_WR_LOCAL_INV] = { |
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.length = sizeof(struct ib_send_wr), |
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.qpt_support = BIT(IB_QPT_UC) | BIT(IB_QPT_RC), |
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.flags = RVT_OPERATION_LOCAL, |
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}, |
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[IB_WR_SEND_WITH_INV] = { |
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.length = sizeof(struct ib_send_wr), |
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.qpt_support = BIT(IB_QPT_RC), |
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}, |
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[IB_WR_OPFN] = { |
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.length = sizeof(struct ib_atomic_wr), |
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.qpt_support = BIT(IB_QPT_RC), |
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.flags = RVT_OPERATION_USE_RESERVE, |
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}, |
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[IB_WR_TID_RDMA_WRITE] = { |
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.length = sizeof(struct ib_rdma_wr), |
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.qpt_support = BIT(IB_QPT_RC), |
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.flags = RVT_OPERATION_IGN_RNR_CNT, |
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}, |
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}; |
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static void flush_list_head(struct list_head *l) |
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{ |
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while (!list_empty(l)) { |
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struct sdma_txreq *tx; |
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tx = list_first_entry( |
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l, |
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struct sdma_txreq, |
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list); |
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list_del_init(&tx->list); |
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hfi1_put_txreq( |
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container_of(tx, struct verbs_txreq, txreq)); |
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} |
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} |
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static void flush_tx_list(struct rvt_qp *qp) |
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{ |
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struct hfi1_qp_priv *priv = qp->priv; |
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flush_list_head(&iowait_get_ib_work(&priv->s_iowait)->tx_head); |
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flush_list_head(&iowait_get_tid_work(&priv->s_iowait)->tx_head); |
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} |
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static void flush_iowait(struct rvt_qp *qp) |
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{ |
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struct hfi1_qp_priv *priv = qp->priv; |
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unsigned long flags; |
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seqlock_t *lock = priv->s_iowait.lock; |
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if (!lock) |
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return; |
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write_seqlock_irqsave(lock, flags); |
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if (!list_empty(&priv->s_iowait.list)) { |
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list_del_init(&priv->s_iowait.list); |
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priv->s_iowait.lock = NULL; |
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rvt_put_qp(qp); |
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} |
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write_sequnlock_irqrestore(lock, flags); |
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} |
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/* |
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* This function is what we would push to the core layer if we wanted to be a |
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* "first class citizen". Instead we hide this here and rely on Verbs ULPs |
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* to blindly pass the MTU enum value from the PathRecord to us. |
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*/ |
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static inline int verbs_mtu_enum_to_int(struct ib_device *dev, enum ib_mtu mtu) |
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{ |
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/* Constraining 10KB packets to 8KB packets */ |
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if (mtu == (enum ib_mtu)OPA_MTU_10240) |
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mtu = (enum ib_mtu)OPA_MTU_8192; |
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return opa_mtu_enum_to_int((enum opa_mtu)mtu); |
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} |
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int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, |
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int attr_mask, struct ib_udata *udata) |
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{ |
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struct ib_qp *ibqp = &qp->ibqp; |
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struct hfi1_ibdev *dev = to_idev(ibqp->device); |
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struct hfi1_devdata *dd = dd_from_dev(dev); |
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u8 sc; |
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if (attr_mask & IB_QP_AV) { |
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sc = ah_to_sc(ibqp->device, &attr->ah_attr); |
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if (sc == 0xf) |
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return -EINVAL; |
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if (!qp_to_sdma_engine(qp, sc) && |
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dd->flags & HFI1_HAS_SEND_DMA) |
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return -EINVAL; |
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if (!qp_to_send_context(qp, sc)) |
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return -EINVAL; |
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} |
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if (attr_mask & IB_QP_ALT_PATH) { |
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sc = ah_to_sc(ibqp->device, &attr->alt_ah_attr); |
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if (sc == 0xf) |
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return -EINVAL; |
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if (!qp_to_sdma_engine(qp, sc) && |
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dd->flags & HFI1_HAS_SEND_DMA) |
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return -EINVAL; |
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if (!qp_to_send_context(qp, sc)) |
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return -EINVAL; |
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} |
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return 0; |
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} |
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/* |
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* qp_set_16b - Set the hdr_type based on whether the slid or the |
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* dlid in the connection is extended. Only applicable for RC and UC |
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* QPs. UD QPs determine this on the fly from the ah in the wqe |
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*/ |
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static inline void qp_set_16b(struct rvt_qp *qp) |
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{ |
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struct hfi1_pportdata *ppd; |
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struct hfi1_ibport *ibp; |
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struct hfi1_qp_priv *priv = qp->priv; |
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|
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/* Update ah_attr to account for extended LIDs */ |
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hfi1_update_ah_attr(qp->ibqp.device, &qp->remote_ah_attr); |
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|
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/* Create 32 bit LIDs */ |
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hfi1_make_opa_lid(&qp->remote_ah_attr); |
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if (!(rdma_ah_get_ah_flags(&qp->remote_ah_attr) & IB_AH_GRH)) |
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return; |
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ibp = to_iport(qp->ibqp.device, qp->port_num); |
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ppd = ppd_from_ibp(ibp); |
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priv->hdr_type = hfi1_get_hdr_type(ppd->lid, &qp->remote_ah_attr); |
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} |
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void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr, |
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int attr_mask, struct ib_udata *udata) |
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{ |
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struct ib_qp *ibqp = &qp->ibqp; |
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struct hfi1_qp_priv *priv = qp->priv; |
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if (attr_mask & IB_QP_AV) { |
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priv->s_sc = ah_to_sc(ibqp->device, &qp->remote_ah_attr); |
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priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); |
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priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); |
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qp_set_16b(qp); |
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} |
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if (attr_mask & IB_QP_PATH_MIG_STATE && |
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attr->path_mig_state == IB_MIG_MIGRATED && |
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qp->s_mig_state == IB_MIG_ARMED) { |
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qp->s_flags |= HFI1_S_AHG_CLEAR; |
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priv->s_sc = ah_to_sc(ibqp->device, &qp->remote_ah_attr); |
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priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); |
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priv->s_sendcontext = qp_to_send_context(qp, priv->s_sc); |
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qp_set_16b(qp); |
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} |
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opfn_qp_init(qp, attr, attr_mask); |
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} |
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/** |
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* hfi1_setup_wqe - set up the wqe |
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* @qp: The qp |
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* @wqe: The built wqe |
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* @call_send: Determine if the send should be posted or scheduled. |
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* |
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* Perform setup of the wqe. This is called |
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* prior to inserting the wqe into the ring but after |
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* the wqe has been setup by RDMAVT. This function |
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* allows the driver the opportunity to perform |
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* validation and additional setup of the wqe. |
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* |
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* Returns 0 on success, -EINVAL on failure |
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* |
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*/ |
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int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe, bool *call_send) |
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{ |
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struct hfi1_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); |
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struct rvt_ah *ah; |
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struct hfi1_pportdata *ppd; |
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struct hfi1_devdata *dd; |
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switch (qp->ibqp.qp_type) { |
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case IB_QPT_RC: |
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hfi1_setup_tid_rdma_wqe(qp, wqe); |
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fallthrough; |
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case IB_QPT_UC: |
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if (wqe->length > 0x80000000U) |
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return -EINVAL; |
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if (wqe->length > qp->pmtu) |
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*call_send = false; |
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break; |
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case IB_QPT_SMI: |
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/* |
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* SM packets should exclusively use VL15 and their SL is |
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* ignored (IBTA v1.3, Section 3.5.8.2). Therefore, when ah |
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* is created, SL is 0 in most cases and as a result some |
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* fields (vl and pmtu) in ah may not be set correctly, |
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* depending on the SL2SC and SC2VL tables at the time. |
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*/ |
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ppd = ppd_from_ibp(ibp); |
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dd = dd_from_ppd(ppd); |
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if (wqe->length > dd->vld[15].mtu) |
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return -EINVAL; |
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break; |
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case IB_QPT_GSI: |
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case IB_QPT_UD: |
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ah = rvt_get_swqe_ah(wqe); |
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if (wqe->length > (1 << ah->log_pmtu)) |
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return -EINVAL; |
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if (ibp->sl_to_sc[rdma_ah_get_sl(&ah->attr)] == 0xf) |
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return -EINVAL; |
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break; |
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default: |
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break; |
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} |
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|
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/* |
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* System latency between send and schedule is large enough that |
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* forcing call_send to true for piothreshold packets is necessary. |
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*/ |
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if (wqe->length <= piothreshold) |
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*call_send = true; |
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return 0; |
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} |
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|
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/** |
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* _hfi1_schedule_send - schedule progress |
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* @qp: the QP |
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* |
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* This schedules qp progress w/o regard to the s_flags. |
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* |
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* It is only used in the post send, which doesn't hold |
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* the s_lock. |
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*/ |
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bool _hfi1_schedule_send(struct rvt_qp *qp) |
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{ |
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struct hfi1_qp_priv *priv = qp->priv; |
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struct hfi1_ibport *ibp = |
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to_iport(qp->ibqp.device, qp->port_num); |
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struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); |
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struct hfi1_devdata *dd = ppd->dd; |
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|
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if (dd->flags & HFI1_SHUTDOWN) |
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return true; |
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|
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return iowait_schedule(&priv->s_iowait, ppd->hfi1_wq, |
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priv->s_sde ? |
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priv->s_sde->cpu : |
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cpumask_first(cpumask_of_node(dd->node))); |
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} |
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|
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static void qp_pio_drain(struct rvt_qp *qp) |
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{ |
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struct hfi1_qp_priv *priv = qp->priv; |
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|
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if (!priv->s_sendcontext) |
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return; |
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while (iowait_pio_pending(&priv->s_iowait)) { |
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write_seqlock_irq(&priv->s_sendcontext->waitlock); |
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hfi1_sc_wantpiobuf_intr(priv->s_sendcontext, 1); |
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write_sequnlock_irq(&priv->s_sendcontext->waitlock); |
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iowait_pio_drain(&priv->s_iowait); |
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write_seqlock_irq(&priv->s_sendcontext->waitlock); |
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hfi1_sc_wantpiobuf_intr(priv->s_sendcontext, 0); |
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write_sequnlock_irq(&priv->s_sendcontext->waitlock); |
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} |
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} |
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|
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/** |
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* hfi1_schedule_send - schedule progress |
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* @qp: the QP |
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* |
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* This schedules qp progress and caller should hold |
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* the s_lock. |
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* @return true if the first leg is scheduled; |
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* false if the first leg is not scheduled. |
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*/ |
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bool hfi1_schedule_send(struct rvt_qp *qp) |
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{ |
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lockdep_assert_held(&qp->s_lock); |
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if (hfi1_send_ok(qp)) { |
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_hfi1_schedule_send(qp); |
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return true; |
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} |
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if (qp->s_flags & HFI1_S_ANY_WAIT_IO) |
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iowait_set_flag(&((struct hfi1_qp_priv *)qp->priv)->s_iowait, |
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IOWAIT_PENDING_IB); |
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return false; |
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} |
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|
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static void hfi1_qp_schedule(struct rvt_qp *qp) |
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{ |
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struct hfi1_qp_priv *priv = qp->priv; |
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bool ret; |
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|
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if (iowait_flag_set(&priv->s_iowait, IOWAIT_PENDING_IB)) { |
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ret = hfi1_schedule_send(qp); |
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if (ret) |
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iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_IB); |
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} |
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if (iowait_flag_set(&priv->s_iowait, IOWAIT_PENDING_TID)) { |
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ret = hfi1_schedule_tid_send(qp); |
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if (ret) |
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iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_TID); |
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} |
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} |
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|
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void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag) |
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{ |
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unsigned long flags; |
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|
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spin_lock_irqsave(&qp->s_lock, flags); |
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if (qp->s_flags & flag) { |
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qp->s_flags &= ~flag; |
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trace_hfi1_qpwakeup(qp, flag); |
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hfi1_qp_schedule(qp); |
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} |
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spin_unlock_irqrestore(&qp->s_lock, flags); |
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/* Notify hfi1_destroy_qp() if it is waiting. */ |
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rvt_put_qp(qp); |
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} |
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|
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void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait) |
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{ |
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struct hfi1_qp_priv *priv = qp->priv; |
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|
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if (iowait_set_work_flag(wait) == IOWAIT_IB_SE) { |
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qp->s_flags &= ~RVT_S_BUSY; |
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/* |
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* If we are sending a first-leg packet from the second leg, |
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* we need to clear the busy flag from priv->s_flags to |
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* avoid a race condition when the qp wakes up before |
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* the call to hfi1_verbs_send() returns to the second |
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* leg. In that case, the second leg will terminate without |
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* being re-scheduled, resulting in failure to send TID RDMA |
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* WRITE DATA and TID RDMA ACK packets. |
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*/ |
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if (priv->s_flags & HFI1_S_TID_BUSY_SET) { |
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priv->s_flags &= ~(HFI1_S_TID_BUSY_SET | |
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RVT_S_BUSY); |
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iowait_set_flag(&priv->s_iowait, IOWAIT_PENDING_TID); |
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} |
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} else { |
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priv->s_flags &= ~RVT_S_BUSY; |
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} |
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} |
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|
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static int iowait_sleep( |
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struct sdma_engine *sde, |
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struct iowait_work *wait, |
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struct sdma_txreq *stx, |
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uint seq, |
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bool pkts_sent) |
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{ |
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struct verbs_txreq *tx = container_of(stx, struct verbs_txreq, txreq); |
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struct rvt_qp *qp; |
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struct hfi1_qp_priv *priv; |
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unsigned long flags; |
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int ret = 0; |
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|
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qp = tx->qp; |
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priv = qp->priv; |
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|
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spin_lock_irqsave(&qp->s_lock, flags); |
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if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) { |
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/* |
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* If we couldn't queue the DMA request, save the info |
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* and try again later rather than destroying the |
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* buffer and undoing the side effects of the copy. |
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*/ |
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/* Make a common routine? */ |
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list_add_tail(&stx->list, &wait->tx_head); |
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write_seqlock(&sde->waitlock); |
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if (sdma_progress(sde, seq, stx)) |
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goto eagain; |
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if (list_empty(&priv->s_iowait.list)) { |
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struct hfi1_ibport *ibp = |
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to_iport(qp->ibqp.device, qp->port_num); |
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|
|
ibp->rvp.n_dmawait++; |
|
qp->s_flags |= RVT_S_WAIT_DMA_DESC; |
|
iowait_get_priority(&priv->s_iowait); |
|
iowait_queue(pkts_sent, &priv->s_iowait, |
|
&sde->dmawait); |
|
priv->s_iowait.lock = &sde->waitlock; |
|
trace_hfi1_qpsleep(qp, RVT_S_WAIT_DMA_DESC); |
|
rvt_get_qp(qp); |
|
} |
|
write_sequnlock(&sde->waitlock); |
|
hfi1_qp_unbusy(qp, wait); |
|
spin_unlock_irqrestore(&qp->s_lock, flags); |
|
ret = -EBUSY; |
|
} else { |
|
spin_unlock_irqrestore(&qp->s_lock, flags); |
|
hfi1_put_txreq(tx); |
|
} |
|
return ret; |
|
eagain: |
|
write_sequnlock(&sde->waitlock); |
|
spin_unlock_irqrestore(&qp->s_lock, flags); |
|
list_del_init(&stx->list); |
|
return -EAGAIN; |
|
} |
|
|
|
static void iowait_wakeup(struct iowait *wait, int reason) |
|
{ |
|
struct rvt_qp *qp = iowait_to_qp(wait); |
|
|
|
WARN_ON(reason != SDMA_AVAIL_REASON); |
|
hfi1_qp_wakeup(qp, RVT_S_WAIT_DMA_DESC); |
|
} |
|
|
|
static void iowait_sdma_drained(struct iowait *wait) |
|
{ |
|
struct rvt_qp *qp = iowait_to_qp(wait); |
|
unsigned long flags; |
|
|
|
/* |
|
* This happens when the send engine notes |
|
* a QP in the error state and cannot |
|
* do the flush work until that QP's |
|
* sdma work has finished. |
|
*/ |
|
spin_lock_irqsave(&qp->s_lock, flags); |
|
if (qp->s_flags & RVT_S_WAIT_DMA) { |
|
qp->s_flags &= ~RVT_S_WAIT_DMA; |
|
hfi1_schedule_send(qp); |
|
} |
|
spin_unlock_irqrestore(&qp->s_lock, flags); |
|
} |
|
|
|
static void hfi1_init_priority(struct iowait *w) |
|
{ |
|
struct rvt_qp *qp = iowait_to_qp(w); |
|
struct hfi1_qp_priv *priv = qp->priv; |
|
|
|
if (qp->s_flags & RVT_S_ACK_PENDING) |
|
w->priority++; |
|
if (priv->s_flags & RVT_S_ACK_PENDING) |
|
w->priority++; |
|
} |
|
|
|
/** |
|
* qp_to_sdma_engine - map a qp to a send engine |
|
* @qp: the QP |
|
* @sc5: the 5 bit sc |
|
* |
|
* Return: |
|
* A send engine for the qp or NULL for SMI type qp. |
|
*/ |
|
struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5) |
|
{ |
|
struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device); |
|
struct sdma_engine *sde; |
|
|
|
if (!(dd->flags & HFI1_HAS_SEND_DMA)) |
|
return NULL; |
|
switch (qp->ibqp.qp_type) { |
|
case IB_QPT_SMI: |
|
return NULL; |
|
default: |
|
break; |
|
} |
|
sde = sdma_select_engine_sc(dd, qp->ibqp.qp_num >> dd->qos_shift, sc5); |
|
return sde; |
|
} |
|
|
|
/** |
|
* qp_to_send_context - map a qp to a send context |
|
* @qp: the QP |
|
* @sc5: the 5 bit sc |
|
* |
|
* Return: |
|
* A send context for the qp |
|
*/ |
|
struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5) |
|
{ |
|
struct hfi1_devdata *dd = dd_from_ibdev(qp->ibqp.device); |
|
|
|
switch (qp->ibqp.qp_type) { |
|
case IB_QPT_SMI: |
|
/* SMA packets to VL15 */ |
|
return dd->vld[15].sc; |
|
default: |
|
break; |
|
} |
|
|
|
return pio_select_send_context_sc(dd, qp->ibqp.qp_num >> dd->qos_shift, |
|
sc5); |
|
} |
|
|
|
static const char * const qp_type_str[] = { |
|
"SMI", "GSI", "RC", "UC", "UD", |
|
}; |
|
|
|
static int qp_idle(struct rvt_qp *qp) |
|
{ |
|
return |
|
qp->s_last == qp->s_acked && |
|
qp->s_acked == qp->s_cur && |
|
qp->s_cur == qp->s_tail && |
|
qp->s_tail == qp->s_head; |
|
} |
|
|
|
/** |
|
* qp_iter_print - print the qp information to seq_file |
|
* @s: the seq_file to emit the qp information on |
|
* @iter: the iterator for the qp hash list |
|
*/ |
|
void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter) |
|
{ |
|
struct rvt_swqe *wqe; |
|
struct rvt_qp *qp = iter->qp; |
|
struct hfi1_qp_priv *priv = qp->priv; |
|
struct sdma_engine *sde; |
|
struct send_context *send_context; |
|
struct rvt_ack_entry *e = NULL; |
|
struct rvt_srq *srq = qp->ibqp.srq ? |
|
ibsrq_to_rvtsrq(qp->ibqp.srq) : NULL; |
|
|
|
sde = qp_to_sdma_engine(qp, priv->s_sc); |
|
wqe = rvt_get_swqe_ptr(qp, qp->s_last); |
|
send_context = qp_to_send_context(qp, priv->s_sc); |
|
if (qp->s_ack_queue) |
|
e = &qp->s_ack_queue[qp->s_tail_ack_queue]; |
|
seq_printf(s, |
|
"N %d %s QP %x R %u %s %u %u f=%x %u %u %u %u %u %u SPSN %x %x %x %x %x RPSN %x S(%u %u %u %u %u %u %u) R(%u %u %u) RQP %x LID %x SL %u MTU %u %u %u %u %u SDE %p,%u SC %p,%u SCQ %u %u PID %d OS %x %x E %x %x %x RNR %d %s %d\n", |
|
iter->n, |
|
qp_idle(qp) ? "I" : "B", |
|
qp->ibqp.qp_num, |
|
atomic_read(&qp->refcount), |
|
qp_type_str[qp->ibqp.qp_type], |
|
qp->state, |
|
wqe ? wqe->wr.opcode : 0, |
|
qp->s_flags, |
|
iowait_sdma_pending(&priv->s_iowait), |
|
iowait_pio_pending(&priv->s_iowait), |
|
!list_empty(&priv->s_iowait.list), |
|
qp->timeout, |
|
wqe ? wqe->ssn : 0, |
|
qp->s_lsn, |
|
qp->s_last_psn, |
|
qp->s_psn, qp->s_next_psn, |
|
qp->s_sending_psn, qp->s_sending_hpsn, |
|
qp->r_psn, |
|
qp->s_last, qp->s_acked, qp->s_cur, |
|
qp->s_tail, qp->s_head, qp->s_size, |
|
qp->s_avail, |
|
/* ack_queue ring pointers, size */ |
|
qp->s_tail_ack_queue, qp->r_head_ack_queue, |
|
rvt_max_atomic(&to_idev(qp->ibqp.device)->rdi), |
|
/* remote QP info */ |
|
qp->remote_qpn, |
|
rdma_ah_get_dlid(&qp->remote_ah_attr), |
|
rdma_ah_get_sl(&qp->remote_ah_attr), |
|
qp->pmtu, |
|
qp->s_retry, |
|
qp->s_retry_cnt, |
|
qp->s_rnr_retry_cnt, |
|
qp->s_rnr_retry, |
|
sde, |
|
sde ? sde->this_idx : 0, |
|
send_context, |
|
send_context ? send_context->sw_index : 0, |
|
ib_cq_head(qp->ibqp.send_cq), |
|
ib_cq_tail(qp->ibqp.send_cq), |
|
qp->pid, |
|
qp->s_state, |
|
qp->s_ack_state, |
|
/* ack queue information */ |
|
e ? e->opcode : 0, |
|
e ? e->psn : 0, |
|
e ? e->lpsn : 0, |
|
qp->r_min_rnr_timer, |
|
srq ? "SRQ" : "RQ", |
|
srq ? srq->rq.size : qp->r_rq.size |
|
); |
|
} |
|
|
|
void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp) |
|
{ |
|
struct hfi1_qp_priv *priv; |
|
|
|
priv = kzalloc_node(sizeof(*priv), GFP_KERNEL, rdi->dparms.node); |
|
if (!priv) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
priv->owner = qp; |
|
|
|
priv->s_ahg = kzalloc_node(sizeof(*priv->s_ahg), GFP_KERNEL, |
|
rdi->dparms.node); |
|
if (!priv->s_ahg) { |
|
kfree(priv); |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
iowait_init( |
|
&priv->s_iowait, |
|
1, |
|
_hfi1_do_send, |
|
_hfi1_do_tid_send, |
|
iowait_sleep, |
|
iowait_wakeup, |
|
iowait_sdma_drained, |
|
hfi1_init_priority); |
|
/* Init to a value to start the running average correctly */ |
|
priv->s_running_pkt_size = piothreshold / 2; |
|
return priv; |
|
} |
|
|
|
void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp) |
|
{ |
|
struct hfi1_qp_priv *priv = qp->priv; |
|
|
|
hfi1_qp_priv_tid_free(rdi, qp); |
|
kfree(priv->s_ahg); |
|
kfree(priv); |
|
} |
|
|
|
unsigned free_all_qps(struct rvt_dev_info *rdi) |
|
{ |
|
struct hfi1_ibdev *verbs_dev = container_of(rdi, |
|
struct hfi1_ibdev, |
|
rdi); |
|
struct hfi1_devdata *dd = container_of(verbs_dev, |
|
struct hfi1_devdata, |
|
verbs_dev); |
|
int n; |
|
unsigned qp_inuse = 0; |
|
|
|
for (n = 0; n < dd->num_pports; n++) { |
|
struct hfi1_ibport *ibp = &dd->pport[n].ibport_data; |
|
|
|
rcu_read_lock(); |
|
if (rcu_dereference(ibp->rvp.qp[0])) |
|
qp_inuse++; |
|
if (rcu_dereference(ibp->rvp.qp[1])) |
|
qp_inuse++; |
|
rcu_read_unlock(); |
|
} |
|
|
|
return qp_inuse; |
|
} |
|
|
|
void flush_qp_waiters(struct rvt_qp *qp) |
|
{ |
|
lockdep_assert_held(&qp->s_lock); |
|
flush_iowait(qp); |
|
hfi1_tid_rdma_flush_wait(qp); |
|
} |
|
|
|
void stop_send_queue(struct rvt_qp *qp) |
|
{ |
|
struct hfi1_qp_priv *priv = qp->priv; |
|
|
|
iowait_cancel_work(&priv->s_iowait); |
|
if (cancel_work_sync(&priv->tid_rdma.trigger_work)) |
|
rvt_put_qp(qp); |
|
} |
|
|
|
void quiesce_qp(struct rvt_qp *qp) |
|
{ |
|
struct hfi1_qp_priv *priv = qp->priv; |
|
|
|
hfi1_del_tid_reap_timer(qp); |
|
hfi1_del_tid_retry_timer(qp); |
|
iowait_sdma_drain(&priv->s_iowait); |
|
qp_pio_drain(qp); |
|
flush_tx_list(qp); |
|
} |
|
|
|
void notify_qp_reset(struct rvt_qp *qp) |
|
{ |
|
hfi1_qp_kern_exp_rcv_clear_all(qp); |
|
qp->r_adefered = 0; |
|
clear_ahg(qp); |
|
|
|
/* Clear any OPFN state */ |
|
if (qp->ibqp.qp_type == IB_QPT_RC) |
|
opfn_conn_error(qp); |
|
} |
|
|
|
/* |
|
* Switch to alternate path. |
|
* The QP s_lock should be held and interrupts disabled. |
|
*/ |
|
void hfi1_migrate_qp(struct rvt_qp *qp) |
|
{ |
|
struct hfi1_qp_priv *priv = qp->priv; |
|
struct ib_event ev; |
|
|
|
qp->s_mig_state = IB_MIG_MIGRATED; |
|
qp->remote_ah_attr = qp->alt_ah_attr; |
|
qp->port_num = rdma_ah_get_port_num(&qp->alt_ah_attr); |
|
qp->s_pkey_index = qp->s_alt_pkey_index; |
|
qp->s_flags |= HFI1_S_AHG_CLEAR; |
|
priv->s_sc = ah_to_sc(qp->ibqp.device, &qp->remote_ah_attr); |
|
priv->s_sde = qp_to_sdma_engine(qp, priv->s_sc); |
|
qp_set_16b(qp); |
|
|
|
ev.device = qp->ibqp.device; |
|
ev.element.qp = &qp->ibqp; |
|
ev.event = IB_EVENT_PATH_MIG; |
|
qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); |
|
} |
|
|
|
int mtu_to_path_mtu(u32 mtu) |
|
{ |
|
return mtu_to_enum(mtu, OPA_MTU_8192); |
|
} |
|
|
|
u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu) |
|
{ |
|
u32 mtu; |
|
struct hfi1_ibdev *verbs_dev = container_of(rdi, |
|
struct hfi1_ibdev, |
|
rdi); |
|
struct hfi1_devdata *dd = container_of(verbs_dev, |
|
struct hfi1_devdata, |
|
verbs_dev); |
|
struct hfi1_ibport *ibp; |
|
u8 sc, vl; |
|
|
|
ibp = &dd->pport[qp->port_num - 1].ibport_data; |
|
sc = ibp->sl_to_sc[rdma_ah_get_sl(&qp->remote_ah_attr)]; |
|
vl = sc_to_vlt(dd, sc); |
|
|
|
mtu = verbs_mtu_enum_to_int(qp->ibqp.device, pmtu); |
|
if (vl < PER_VL_SEND_CONTEXTS) |
|
mtu = min_t(u32, mtu, dd->vld[vl].mtu); |
|
return mtu; |
|
} |
|
|
|
int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp, |
|
struct ib_qp_attr *attr) |
|
{ |
|
int mtu, pidx = qp->port_num - 1; |
|
struct hfi1_ibdev *verbs_dev = container_of(rdi, |
|
struct hfi1_ibdev, |
|
rdi); |
|
struct hfi1_devdata *dd = container_of(verbs_dev, |
|
struct hfi1_devdata, |
|
verbs_dev); |
|
mtu = verbs_mtu_enum_to_int(qp->ibqp.device, attr->path_mtu); |
|
if (mtu == -1) |
|
return -1; /* values less than 0 are error */ |
|
|
|
if (mtu > dd->pport[pidx].ibmtu) |
|
return mtu_to_enum(dd->pport[pidx].ibmtu, IB_MTU_2048); |
|
else |
|
return attr->path_mtu; |
|
} |
|
|
|
void notify_error_qp(struct rvt_qp *qp) |
|
{ |
|
struct hfi1_qp_priv *priv = qp->priv; |
|
seqlock_t *lock = priv->s_iowait.lock; |
|
|
|
if (lock) { |
|
write_seqlock(lock); |
|
if (!list_empty(&priv->s_iowait.list) && |
|
!(qp->s_flags & RVT_S_BUSY) && |
|
!(priv->s_flags & RVT_S_BUSY)) { |
|
qp->s_flags &= ~HFI1_S_ANY_WAIT_IO; |
|
iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_IB); |
|
iowait_clear_flag(&priv->s_iowait, IOWAIT_PENDING_TID); |
|
list_del_init(&priv->s_iowait.list); |
|
priv->s_iowait.lock = NULL; |
|
rvt_put_qp(qp); |
|
} |
|
write_sequnlock(lock); |
|
} |
|
|
|
if (!(qp->s_flags & RVT_S_BUSY) && !(priv->s_flags & RVT_S_BUSY)) { |
|
qp->s_hdrwords = 0; |
|
if (qp->s_rdma_mr) { |
|
rvt_put_mr(qp->s_rdma_mr); |
|
qp->s_rdma_mr = NULL; |
|
} |
|
flush_tx_list(qp); |
|
} |
|
} |
|
|
|
/** |
|
* hfi1_qp_iter_cb - callback for iterator |
|
* @qp: the qp |
|
* @v: the sl in low bits of v |
|
* |
|
* This is called from the iterator callback to work |
|
* on an individual qp. |
|
*/ |
|
static void hfi1_qp_iter_cb(struct rvt_qp *qp, u64 v) |
|
{ |
|
int lastwqe; |
|
struct ib_event ev; |
|
struct hfi1_ibport *ibp = |
|
to_iport(qp->ibqp.device, qp->port_num); |
|
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); |
|
u8 sl = (u8)v; |
|
|
|
if (qp->port_num != ppd->port || |
|
(qp->ibqp.qp_type != IB_QPT_UC && |
|
qp->ibqp.qp_type != IB_QPT_RC) || |
|
rdma_ah_get_sl(&qp->remote_ah_attr) != sl || |
|
!(ib_rvt_state_ops[qp->state] & RVT_POST_SEND_OK)) |
|
return; |
|
|
|
spin_lock_irq(&qp->r_lock); |
|
spin_lock(&qp->s_hlock); |
|
spin_lock(&qp->s_lock); |
|
lastwqe = rvt_error_qp(qp, IB_WC_WR_FLUSH_ERR); |
|
spin_unlock(&qp->s_lock); |
|
spin_unlock(&qp->s_hlock); |
|
spin_unlock_irq(&qp->r_lock); |
|
if (lastwqe) { |
|
ev.device = qp->ibqp.device; |
|
ev.element.qp = &qp->ibqp; |
|
ev.event = IB_EVENT_QP_LAST_WQE_REACHED; |
|
qp->ibqp.event_handler(&ev, qp->ibqp.qp_context); |
|
} |
|
} |
|
|
|
/** |
|
* hfi1_error_port_qps - put a port's RC/UC qps into error state |
|
* @ibp: the ibport. |
|
* @sl: the service level. |
|
* |
|
* This function places all RC/UC qps with a given service level into error |
|
* state. It is generally called to force upper lay apps to abandon stale qps |
|
* after an sl->sc mapping change. |
|
*/ |
|
void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl) |
|
{ |
|
struct hfi1_pportdata *ppd = ppd_from_ibp(ibp); |
|
struct hfi1_ibdev *dev = &ppd->dd->verbs_dev; |
|
|
|
rvt_qp_iter(&dev->rdi, sl, hfi1_qp_iter_cb); |
|
}
|
|
|