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1/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
2/*
3 * Copyright(c) 2016 - 2018 Intel Corporation.
4 */
5
6#ifndef HFI1_VERBS_TXREQ_H
7#define HFI1_VERBS_TXREQ_H
8
9#include <linux/types.h>
10#include <linux/slab.h>
11
12#include "verbs.h"
13#include "sdma_txreq.h"
14#include "iowait.h"
15
16struct verbs_txreq {
17 struct hfi1_sdma_header phdr;
18 struct sdma_txreq txreq;
19 struct rvt_qp *qp;
20 struct rvt_swqe *wqe;
21 struct rvt_mregion *mr;
22 struct rvt_sge_state *ss;
23 struct sdma_engine *sde;
24 struct send_context *psc;
25 u16 hdr_dwords;
26 u16 s_cur_size;
27};
28
29struct hfi1_ibdev;
30struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
31 struct rvt_qp *qp);
32
33#define VERBS_TXREQ_GFP (GFP_ATOMIC | __GFP_NOWARN)
34static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev,
35 struct rvt_qp *qp)
36 __must_hold(&qp->slock)
37{
38 struct verbs_txreq *tx;
39 struct hfi1_qp_priv *priv = qp->priv;
40
41 tx = kmem_cache_alloc(dev->verbs_txreq_cache, VERBS_TXREQ_GFP);
42 if (unlikely(!tx)) {
43 /* call slow path to get the lock */
44 tx = __get_txreq(dev, qp);
45 if (!tx)
46 return tx;
47 }
48 tx->qp = qp;
49 tx->mr = NULL;
50 tx->sde = priv->s_sde;
51 tx->psc = priv->s_sendcontext;
52 /* so that we can test if the sdma descriptors are there */
53 tx->txreq.num_desc = 0;
54 /* Set the header type */
55 tx->phdr.hdr.hdr_type = priv->hdr_type;
56 tx->txreq.flags = 0;
57 return tx;
58}
59
60static inline struct verbs_txreq *get_waiting_verbs_txreq(struct iowait_work *w)
61{
62 struct sdma_txreq *stx;
63
64 stx = iowait_get_txhead(w);
65 if (stx)
66 return container_of(stx, struct verbs_txreq, txreq);
67 return NULL;
68}
69
70static inline bool verbs_txreq_queued(struct iowait_work *w)
71{
72 return iowait_packet_queued(w);
73}
74
75void hfi1_put_txreq(struct verbs_txreq *tx);
76int verbs_txreq_init(struct hfi1_ibdev *dev);
77void verbs_txreq_exit(struct hfi1_ibdev *dev);
78
79#endif /* HFI1_VERBS_TXREQ_H */
1/*
2 * Copyright(c) 2016 - 2018 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
58struct 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
71struct hfi1_ibdev;
72struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
73 struct rvt_qp *qp);
74
75#define VERBS_TXREQ_GFP (GFP_ATOMIC | __GFP_NOWARN)
76static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev,
77 struct rvt_qp *qp)
78 __must_hold(&qp->slock)
79{
80 struct verbs_txreq *tx;
81 struct hfi1_qp_priv *priv = qp->priv;
82
83 tx = kmem_cache_alloc(dev->verbs_txreq_cache, VERBS_TXREQ_GFP);
84 if (unlikely(!tx)) {
85 /* call slow path to get the lock */
86 tx = __get_txreq(dev, qp);
87 if (!tx)
88 return tx;
89 }
90 tx->qp = qp;
91 tx->mr = NULL;
92 tx->sde = priv->s_sde;
93 tx->psc = priv->s_sendcontext;
94 /* so that we can test if the sdma decriptors are there */
95 tx->txreq.num_desc = 0;
96 /* Set the header type */
97 tx->phdr.hdr.hdr_type = priv->hdr_type;
98 tx->txreq.flags = 0;
99 return tx;
100}
101
102static inline struct sdma_txreq *get_sdma_txreq(struct verbs_txreq *tx)
103{
104 return &tx->txreq;
105}
106
107static inline struct verbs_txreq *get_waiting_verbs_txreq(struct iowait_work *w)
108{
109 struct sdma_txreq *stx;
110
111 stx = iowait_get_txhead(w);
112 if (stx)
113 return container_of(stx, struct verbs_txreq, txreq);
114 return NULL;
115}
116
117static inline bool verbs_txreq_queued(struct iowait_work *w)
118{
119 return iowait_packet_queued(w);
120}
121
122void hfi1_put_txreq(struct verbs_txreq *tx);
123int verbs_txreq_init(struct hfi1_ibdev *dev);
124void verbs_txreq_exit(struct hfi1_ibdev *dev);
125
126#endif /* HFI1_VERBS_TXREQ_H */