1 /* SPDX-License-Identifier: BSD-3-Clause */
2 /* Copyright (c) 2021, Intel Corporation
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * 3. Neither the name of the Intel Corporation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /**
33 * @file iavf_txrx_common.h
34 * @brief Tx/Rx hotpath functions common to legacy and iflib
35 *
36 * Contains implementations for functions used in the hotpath for both the
37 * legacy and iflib driver implementations.
38 */
39 #ifndef _IAVF_TXRX_COMMON_H_
40 #define _IAVF_TXRX_COMMON_H_
41
42 #include "iavf_iflib.h"
43
44 static inline int iavf_ptype_to_hash(u8 ptype);
45
46 /**
47 * iavf_ptype_to_hash - parse the packet type
48 * @ptype: packet type
49 *
50 * Determine the appropriate hash for a given packet type
51 *
52 * @returns the M_HASHTYPE_* value for the given packet type.
53 */
54 static inline int
iavf_ptype_to_hash(u8 ptype)55 iavf_ptype_to_hash(u8 ptype)
56 {
57 struct iavf_rx_ptype_decoded decoded;
58
59 decoded = decode_rx_desc_ptype(ptype);
60
61 if (!decoded.known)
62 return M_HASHTYPE_OPAQUE;
63
64 if (decoded.outer_ip == IAVF_RX_PTYPE_OUTER_L2)
65 return M_HASHTYPE_OPAQUE;
66
67 /* Note: anything that gets to this point is IP */
68 if (decoded.outer_ip_ver == IAVF_RX_PTYPE_OUTER_IPV6) {
69 switch (decoded.inner_prot) {
70 case IAVF_RX_PTYPE_INNER_PROT_TCP:
71 return M_HASHTYPE_RSS_TCP_IPV6;
72 case IAVF_RX_PTYPE_INNER_PROT_UDP:
73 return M_HASHTYPE_RSS_UDP_IPV6;
74 default:
75 return M_HASHTYPE_RSS_IPV6;
76 }
77 }
78 if (decoded.outer_ip_ver == IAVF_RX_PTYPE_OUTER_IPV4) {
79 switch (decoded.inner_prot) {
80 case IAVF_RX_PTYPE_INNER_PROT_TCP:
81 return M_HASHTYPE_RSS_TCP_IPV4;
82 case IAVF_RX_PTYPE_INNER_PROT_UDP:
83 return M_HASHTYPE_RSS_UDP_IPV4;
84 default:
85 return M_HASHTYPE_RSS_IPV4;
86 }
87 }
88 /* We should never get here! */
89 return M_HASHTYPE_OPAQUE;
90 }
91
92 #endif /* _IAVF_TXRX_COMMON_H_ */
93