1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright(c) 2016 - 2018 Intel Corporation.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * This file is provided under a dual BSD/GPLv2 license. When using or
5*4882a593Smuzhiyun * redistributing this file, you may do so under either license.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * GPL LICENSE SUMMARY
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or modify
10*4882a593Smuzhiyun * it under the terms of version 2 of the GNU General Public License as
11*4882a593Smuzhiyun * published by the Free Software Foundation.
12*4882a593Smuzhiyun *
13*4882a593Smuzhiyun * This program is distributed in the hope that it will be useful, but
14*4882a593Smuzhiyun * WITHOUT ANY WARRANTY; without even the implied warranty of
15*4882a593Smuzhiyun * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16*4882a593Smuzhiyun * General Public License for more details.
17*4882a593Smuzhiyun *
18*4882a593Smuzhiyun * BSD LICENSE
19*4882a593Smuzhiyun *
20*4882a593Smuzhiyun * Redistribution and use in source and binary forms, with or without
21*4882a593Smuzhiyun * modification, are permitted provided that the following conditions
22*4882a593Smuzhiyun * are met:
23*4882a593Smuzhiyun *
24*4882a593Smuzhiyun * - Redistributions of source code must retain the above copyright
25*4882a593Smuzhiyun * notice, this list of conditions and the following disclaimer.
26*4882a593Smuzhiyun * - Redistributions in binary form must reproduce the above copyright
27*4882a593Smuzhiyun * notice, this list of conditions and the following disclaimer in
28*4882a593Smuzhiyun * the documentation and/or other materials provided with the
29*4882a593Smuzhiyun * distribution.
30*4882a593Smuzhiyun * - Neither the name of Intel Corporation nor the names of its
31*4882a593Smuzhiyun * contributors may be used to endorse or promote products derived
32*4882a593Smuzhiyun * from this software without specific prior written permission.
33*4882a593Smuzhiyun *
34*4882a593Smuzhiyun * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
35*4882a593Smuzhiyun * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
36*4882a593Smuzhiyun * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
37*4882a593Smuzhiyun * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
38*4882a593Smuzhiyun * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39*4882a593Smuzhiyun * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
40*4882a593Smuzhiyun * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
41*4882a593Smuzhiyun * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
42*4882a593Smuzhiyun * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
43*4882a593Smuzhiyun * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
44*4882a593Smuzhiyun * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45*4882a593Smuzhiyun *
46*4882a593Smuzhiyun */
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun #ifndef HFI1_VERBS_TXREQ_H
49*4882a593Smuzhiyun #define HFI1_VERBS_TXREQ_H
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun #include <linux/types.h>
52*4882a593Smuzhiyun #include <linux/slab.h>
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun #include "verbs.h"
55*4882a593Smuzhiyun #include "sdma_txreq.h"
56*4882a593Smuzhiyun #include "iowait.h"
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun struct verbs_txreq {
59*4882a593Smuzhiyun struct hfi1_sdma_header phdr;
60*4882a593Smuzhiyun struct sdma_txreq txreq;
61*4882a593Smuzhiyun struct rvt_qp *qp;
62*4882a593Smuzhiyun struct rvt_swqe *wqe;
63*4882a593Smuzhiyun struct rvt_mregion *mr;
64*4882a593Smuzhiyun struct rvt_sge_state *ss;
65*4882a593Smuzhiyun struct sdma_engine *sde;
66*4882a593Smuzhiyun struct send_context *psc;
67*4882a593Smuzhiyun u16 hdr_dwords;
68*4882a593Smuzhiyun u16 s_cur_size;
69*4882a593Smuzhiyun };
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun struct hfi1_ibdev;
72*4882a593Smuzhiyun struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev,
73*4882a593Smuzhiyun struct rvt_qp *qp);
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun #define VERBS_TXREQ_GFP (GFP_ATOMIC | __GFP_NOWARN)
get_txreq(struct hfi1_ibdev * dev,struct rvt_qp * qp)76*4882a593Smuzhiyun static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev,
77*4882a593Smuzhiyun struct rvt_qp *qp)
78*4882a593Smuzhiyun __must_hold(&qp->slock)
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun struct verbs_txreq *tx;
81*4882a593Smuzhiyun struct hfi1_qp_priv *priv = qp->priv;
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun tx = kmem_cache_alloc(dev->verbs_txreq_cache, VERBS_TXREQ_GFP);
84*4882a593Smuzhiyun if (unlikely(!tx)) {
85*4882a593Smuzhiyun /* call slow path to get the lock */
86*4882a593Smuzhiyun tx = __get_txreq(dev, qp);
87*4882a593Smuzhiyun if (!tx)
88*4882a593Smuzhiyun return tx;
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun tx->qp = qp;
91*4882a593Smuzhiyun tx->mr = NULL;
92*4882a593Smuzhiyun tx->sde = priv->s_sde;
93*4882a593Smuzhiyun tx->psc = priv->s_sendcontext;
94*4882a593Smuzhiyun /* so that we can test if the sdma descriptors are there */
95*4882a593Smuzhiyun tx->txreq.num_desc = 0;
96*4882a593Smuzhiyun /* Set the header type */
97*4882a593Smuzhiyun tx->phdr.hdr.hdr_type = priv->hdr_type;
98*4882a593Smuzhiyun tx->txreq.flags = 0;
99*4882a593Smuzhiyun return tx;
100*4882a593Smuzhiyun }
101*4882a593Smuzhiyun
get_sdma_txreq(struct verbs_txreq * tx)102*4882a593Smuzhiyun static inline struct sdma_txreq *get_sdma_txreq(struct verbs_txreq *tx)
103*4882a593Smuzhiyun {
104*4882a593Smuzhiyun return &tx->txreq;
105*4882a593Smuzhiyun }
106*4882a593Smuzhiyun
get_waiting_verbs_txreq(struct iowait_work * w)107*4882a593Smuzhiyun static inline struct verbs_txreq *get_waiting_verbs_txreq(struct iowait_work *w)
108*4882a593Smuzhiyun {
109*4882a593Smuzhiyun struct sdma_txreq *stx;
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun stx = iowait_get_txhead(w);
112*4882a593Smuzhiyun if (stx)
113*4882a593Smuzhiyun return container_of(stx, struct verbs_txreq, txreq);
114*4882a593Smuzhiyun return NULL;
115*4882a593Smuzhiyun }
116*4882a593Smuzhiyun
verbs_txreq_queued(struct iowait_work * w)117*4882a593Smuzhiyun static inline bool verbs_txreq_queued(struct iowait_work *w)
118*4882a593Smuzhiyun {
119*4882a593Smuzhiyun return iowait_packet_queued(w);
120*4882a593Smuzhiyun }
121*4882a593Smuzhiyun
122*4882a593Smuzhiyun void hfi1_put_txreq(struct verbs_txreq *tx);
123*4882a593Smuzhiyun int verbs_txreq_init(struct hfi1_ibdev *dev);
124*4882a593Smuzhiyun void verbs_txreq_exit(struct hfi1_ibdev *dev);
125*4882a593Smuzhiyun
126*4882a593Smuzhiyun #endif /* HFI1_VERBS_TXREQ_H */
127