1 /* 2 * Copyright(c) 2016 Intel Corporation. 3 * 4 * This file is provided under a dual BSD/GPLv2 license. When using or 5 * redistributing this file, you may do so under either license. 6 * 7 * GPL LICENSE SUMMARY 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of version 2 of the GNU General Public License as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * BSD LICENSE 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 24 * - Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * - Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in 28 * the documentation and/or other materials provided with the 29 * distribution. 30 * - Neither the name of Intel Corporation nor the names of its 31 * contributors may be used to endorse or promote products derived 32 * from this software without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 35 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 36 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 38 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 39 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 40 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 41 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 42 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 43 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 44 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 45 * 46 */ 47 48 #ifndef HFI1_VERBS_TXREQ_H 49 #define HFI1_VERBS_TXREQ_H 50 51 #include <linux/types.h> 52 #include <linux/slab.h> 53 54 #include "verbs.h" 55 #include "sdma_txreq.h" 56 #include "iowait.h" 57 58 struct verbs_txreq { 59 struct hfi1_sdma_header phdr; 60 struct sdma_txreq txreq; 61 struct rvt_qp *qp; 62 struct rvt_swqe *wqe; 63 struct rvt_mregion *mr; 64 struct rvt_sge_state *ss; 65 struct sdma_engine *sde; 66 struct send_context *psc; 67 u16 hdr_dwords; 68 u16 s_cur_size; 69 }; 70 71 struct hfi1_ibdev; 72 struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev, 73 struct rvt_qp *qp); 74 75 static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev, 76 struct rvt_qp *qp) 77 __must_hold(&qp->slock) 78 { 79 struct verbs_txreq *tx; 80 struct hfi1_qp_priv *priv = qp->priv; 81 82 tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC); 83 if (unlikely(!tx)) { 84 /* call slow path to get the lock */ 85 tx = __get_txreq(dev, qp); 86 if (IS_ERR(tx)) 87 return tx; 88 } 89 tx->qp = qp; 90 tx->mr = NULL; 91 tx->sde = priv->s_sde; 92 tx->psc = priv->s_sendcontext; 93 /* so that we can test if the sdma decriptors are there */ 94 tx->txreq.num_desc = 0; 95 /* Set the header type */ 96 tx->phdr.hdr.hdr_type = priv->hdr_type; 97 return tx; 98 } 99 100 static inline struct sdma_txreq *get_sdma_txreq(struct verbs_txreq *tx) 101 { 102 return &tx->txreq; 103 } 104 105 static inline struct verbs_txreq *get_waiting_verbs_txreq(struct rvt_qp *qp) 106 { 107 struct sdma_txreq *stx; 108 struct hfi1_qp_priv *priv = qp->priv; 109 110 stx = iowait_get_txhead(&priv->s_iowait); 111 if (stx) 112 return container_of(stx, struct verbs_txreq, txreq); 113 return NULL; 114 } 115 116 static inline bool verbs_txreq_queued(struct rvt_qp *qp) 117 { 118 struct hfi1_qp_priv *priv = qp->priv; 119 120 return iowait_packet_queued(&priv->s_iowait); 121 } 122 123 void hfi1_put_txreq(struct verbs_txreq *tx); 124 int verbs_txreq_init(struct hfi1_ibdev *dev); 125 void verbs_txreq_exit(struct hfi1_ibdev *dev); 126 127 #endif /* HFI1_VERBS_TXREQ_H */ 128