1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Copyright(c) 2016 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "hfi.h"
#include "verbs_txreq.h"
#include "qp.h"
#include "trace.h"
#define TXREQ_LEN 24
void hfi1_put_txreq(struct verbs_txreq *tx)
{
struct hfi1_ibdev *dev;
struct rvt_qp *qp;
unsigned long flags;
unsigned int seq;
struct hfi1_qp_priv *priv;
qp = tx->qp;
dev = to_idev(qp->ibqp.device);
if (tx->mr)
rvt_put_mr(tx->mr);
sdma_txclean(dd_from_dev(dev), &tx->txreq);
/* Free verbs_txreq and return to slab cache */
kmem_cache_free(dev->verbs_txreq_cache, tx);
do {
seq = read_seqbegin(&dev->iowait_lock);
if (!list_empty(&dev->txwait)) {
struct iowait *wait;
write_seqlock_irqsave(&dev->iowait_lock, flags);
wait = list_first_entry(&dev->txwait, struct iowait,
list);
qp = iowait_to_qp(wait);
priv = qp->priv;
list_del_init(&priv->s_iowait.list);
/* refcount held until actual wake up */
write_sequnlock_irqrestore(&dev->iowait_lock, flags);
hfi1_qp_wakeup(qp, RVT_S_WAIT_TX);
break;
}
} while (read_seqretry(&dev->iowait_lock, seq));
}
struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
struct rvt_qp *qp)
__must_hold(&qp->s_lock)
{
struct verbs_txreq *tx = ERR_PTR(-EBUSY);
write_seqlock(&dev->iowait_lock);
if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) {
struct hfi1_qp_priv *priv;
tx = kmem_cache_alloc(dev->verbs_txreq_cache, GFP_ATOMIC);
if (tx)
goto out;
priv = qp->priv;
if (list_empty(&priv->s_iowait.list)) {
dev->n_txwait++;
qp->s_flags |= RVT_S_WAIT_TX;
list_add_tail(&priv->s_iowait.list, &dev->txwait);
trace_hfi1_qpsleep(qp, RVT_S_WAIT_TX);
atomic_inc(&qp->refcount);
}
qp->s_flags &= ~RVT_S_BUSY;
}
out:
write_sequnlock(&dev->iowait_lock);
return tx;
}
static void verbs_txreq_kmem_cache_ctor(void *obj)
{
struct verbs_txreq *tx = (struct verbs_txreq *)obj;
memset(tx, 0, sizeof(*tx));
}
int verbs_txreq_init(struct hfi1_ibdev *dev)
{
char buf[TXREQ_LEN];
struct hfi1_devdata *dd = dd_from_dev(dev);
snprintf(buf, sizeof(buf), "hfi1_%u_vtxreq_cache", dd->unit);
dev->verbs_txreq_cache = kmem_cache_create(buf,
sizeof(struct verbs_txreq),
0, SLAB_HWCACHE_ALIGN,
verbs_txreq_kmem_cache_ctor);
if (!dev->verbs_txreq_cache)
return -ENOMEM;
return 0;
}
void verbs_txreq_exit(struct hfi1_ibdev *dev)
{
kmem_cache_destroy(dev->verbs_txreq_cache);
dev->verbs_txreq_cache = NULL;
}
|
