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 descriptors 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 */
127