srq.c

 1/*
 2 * This file is part of the Chelsio T6 Ethernet driver for Linux.
 3 *
 4 * Copyright (c) 2017-2018 Chelsio Communications, Inc. All rights reserved.
 5 *
 6 * This software is available to you under a choice of one of two
 7 * licenses.  You may choose to be licensed under the terms of the GNU
 8 * General Public License (GPL) Version 2, available from the file
 9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 *     Redistribution and use in source and binary forms, with or
13 *     without modification, are permitted provided that the following
14 *     conditions are met:
15 *
16 *      - Redistributions of source code must retain the above
17 *        copyright notice, this list of conditions and the following
18 *        disclaimer.
19 *
20 *      - Redistributions in binary form must reproduce the above
21 *        copyright notice, this list of conditions and the following
22 *        disclaimer in the documentation and/or other materials
23 *        provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 */
34
35#include "cxgb4.h"
36#include "t4_msg.h"
37#include "srq.h"
38
39struct srq_data *t4_init_srq(int srq_size)
40{
41	struct srq_data *s;
42
43	s = kvzalloc(sizeof(*s), GFP_KERNEL);
44	if (!s)
45		return NULL;
46
47	s->srq_size = srq_size;
48	init_completion(&s->comp);
49	mutex_init(&s->lock);
50
51	return s;
52}
53
54void do_srq_table_rpl(struct adapter *adap,
55		      const struct cpl_srq_table_rpl *rpl)
56{
57	unsigned int idx = TID_TID_G(GET_TID(rpl));
58	struct srq_data *s = adap->srq;
59	struct srq_entry *e;
60
61	if (unlikely(rpl->status != CPL_CONTAINS_READ_RPL)) {
62		dev_err(adap->pdev_dev,
63			"Unexpected SRQ_TABLE_RPL status %u for entry %u\n",
64				rpl->status, idx);
65		goto out;
66	}
67
68	/* Store the read entry */
69	e = s->entryp;
70	e->valid = 1;
71	e->idx = idx;
72	e->pdid = SRQT_PDID_G(be64_to_cpu(rpl->rsvd_pdid));
73	e->qlen = SRQT_QLEN_G(be32_to_cpu(rpl->qlen_qbase));
74	e->qbase = SRQT_QBASE_G(be32_to_cpu(rpl->qlen_qbase));
75	e->cur_msn = be16_to_cpu(rpl->cur_msn);
76	e->max_msn = be16_to_cpu(rpl->max_msn);
77out:
78	complete(&s->comp);
79}