xref: /freebsd/sys/dev/ena/ena_rss.h (revision bd66c1b43e33540205dbc1187c2f2a15c58b57ba)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2015-2024 Amazon.com, Inc. or its affiliates.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  *
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  *
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  *
30  */
31 
32 #ifndef ENA_RSS_H
33 #define ENA_RSS_H
34 
35 #include "opt_rss.h"
36 
37 #include <sys/types.h>
38 
39 #ifdef RSS
40 #include <net/rss_config.h>
41 #endif
42 
43 #include "ena.h"
44 
45 #define ENA_RX_RSS_MSG_RECORD_SZ 8
46 
47 struct ena_indir {
48 	uint32_t table[ENA_RX_RSS_TABLE_SIZE];
49 	/* This is the buffer wired to `rss.indir_table` sysctl. */
50 	char sysctl_buf[ENA_RX_RSS_TABLE_SIZE * ENA_RX_RSS_MSG_RECORD_SZ];
51 };
52 
53 int ena_rss_set_hash(struct ena_com_dev *ena_dev, const u8 *key);
54 int ena_rss_get_hash_key(struct ena_com_dev *ena_dev, u8 *key);
55 int ena_rss_configure(struct ena_adapter *);
56 int ena_rss_indir_get(struct ena_adapter *adapter, uint32_t *table);
57 int ena_rss_indir_set(struct ena_adapter *adapter, uint32_t *table);
58 int ena_rss_indir_init(struct ena_adapter *adapter);
59 
60 static inline void
61 ena_rss_copy_indir_buf(char *buf, uint32_t *table)
62 {
63 	int i;
64 
65 	for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; ++i) {
66 		buf += snprintf(buf, ENA_RX_RSS_MSG_RECORD_SZ + 1, "%s%d:%d",
67 		    i == 0 ? "" : " ", i, table[i]);
68 	}
69 }
70 
71 #endif /* !(ENA_RSS_H) */
72