1*ca853deeSEric Joyner /* SPDX-License-Identifier: BSD-3-Clause */
2*ca853deeSEric Joyner /* Copyright (c) 2021, Intel Corporation
3*ca853deeSEric Joyner * All rights reserved.
4*ca853deeSEric Joyner *
5*ca853deeSEric Joyner * Redistribution and use in source and binary forms, with or without
6*ca853deeSEric Joyner * modification, are permitted provided that the following conditions are met:
7*ca853deeSEric Joyner *
8*ca853deeSEric Joyner * 1. Redistributions of source code must retain the above copyright notice,
9*ca853deeSEric Joyner * this list of conditions and the following disclaimer.
10*ca853deeSEric Joyner *
11*ca853deeSEric Joyner * 2. Redistributions in binary form must reproduce the above copyright
12*ca853deeSEric Joyner * notice, this list of conditions and the following disclaimer in the
13*ca853deeSEric Joyner * documentation and/or other materials provided with the distribution.
14*ca853deeSEric Joyner *
15*ca853deeSEric Joyner * 3. Neither the name of the Intel Corporation nor the names of its
16*ca853deeSEric Joyner * contributors may be used to endorse or promote products derived from
17*ca853deeSEric Joyner * this software without specific prior written permission.
18*ca853deeSEric Joyner *
19*ca853deeSEric Joyner * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20*ca853deeSEric Joyner * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21*ca853deeSEric Joyner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22*ca853deeSEric Joyner * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23*ca853deeSEric Joyner * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24*ca853deeSEric Joyner * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25*ca853deeSEric Joyner * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26*ca853deeSEric Joyner * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27*ca853deeSEric Joyner * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28*ca853deeSEric Joyner * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29*ca853deeSEric Joyner * POSSIBILITY OF SUCH DAMAGE.
30*ca853deeSEric Joyner */
31*ca853deeSEric Joyner
32*ca853deeSEric Joyner /**
33*ca853deeSEric Joyner * @file iavf_txrx_common.h
34*ca853deeSEric Joyner * @brief Tx/Rx hotpath functions common to legacy and iflib
35*ca853deeSEric Joyner *
36*ca853deeSEric Joyner * Contains implementations for functions used in the hotpath for both the
37*ca853deeSEric Joyner * legacy and iflib driver implementations.
38*ca853deeSEric Joyner */
39*ca853deeSEric Joyner #ifndef _IAVF_TXRX_COMMON_H_
40*ca853deeSEric Joyner #define _IAVF_TXRX_COMMON_H_
41*ca853deeSEric Joyner
42*ca853deeSEric Joyner #include "iavf_iflib.h"
43*ca853deeSEric Joyner
44*ca853deeSEric Joyner static inline int iavf_ptype_to_hash(u8 ptype);
45*ca853deeSEric Joyner
46*ca853deeSEric Joyner /**
47*ca853deeSEric Joyner * iavf_ptype_to_hash - parse the packet type
48*ca853deeSEric Joyner * @ptype: packet type
49*ca853deeSEric Joyner *
50*ca853deeSEric Joyner * Determine the appropriate hash for a given packet type
51*ca853deeSEric Joyner *
52*ca853deeSEric Joyner * @returns the M_HASHTYPE_* value for the given packet type.
53*ca853deeSEric Joyner */
54*ca853deeSEric Joyner static inline int
iavf_ptype_to_hash(u8 ptype)55*ca853deeSEric Joyner iavf_ptype_to_hash(u8 ptype)
56*ca853deeSEric Joyner {
57*ca853deeSEric Joyner struct iavf_rx_ptype_decoded decoded;
58*ca853deeSEric Joyner
59*ca853deeSEric Joyner decoded = decode_rx_desc_ptype(ptype);
60*ca853deeSEric Joyner
61*ca853deeSEric Joyner if (!decoded.known)
62*ca853deeSEric Joyner return M_HASHTYPE_OPAQUE;
63*ca853deeSEric Joyner
64*ca853deeSEric Joyner if (decoded.outer_ip == IAVF_RX_PTYPE_OUTER_L2)
65*ca853deeSEric Joyner return M_HASHTYPE_OPAQUE;
66*ca853deeSEric Joyner
67*ca853deeSEric Joyner /* Note: anything that gets to this point is IP */
68*ca853deeSEric Joyner if (decoded.outer_ip_ver == IAVF_RX_PTYPE_OUTER_IPV6) {
69*ca853deeSEric Joyner switch (decoded.inner_prot) {
70*ca853deeSEric Joyner case IAVF_RX_PTYPE_INNER_PROT_TCP:
71*ca853deeSEric Joyner return M_HASHTYPE_RSS_TCP_IPV6;
72*ca853deeSEric Joyner case IAVF_RX_PTYPE_INNER_PROT_UDP:
73*ca853deeSEric Joyner return M_HASHTYPE_RSS_UDP_IPV6;
74*ca853deeSEric Joyner default:
75*ca853deeSEric Joyner return M_HASHTYPE_RSS_IPV6;
76*ca853deeSEric Joyner }
77*ca853deeSEric Joyner }
78*ca853deeSEric Joyner if (decoded.outer_ip_ver == IAVF_RX_PTYPE_OUTER_IPV4) {
79*ca853deeSEric Joyner switch (decoded.inner_prot) {
80*ca853deeSEric Joyner case IAVF_RX_PTYPE_INNER_PROT_TCP:
81*ca853deeSEric Joyner return M_HASHTYPE_RSS_TCP_IPV4;
82*ca853deeSEric Joyner case IAVF_RX_PTYPE_INNER_PROT_UDP:
83*ca853deeSEric Joyner return M_HASHTYPE_RSS_UDP_IPV4;
84*ca853deeSEric Joyner default:
85*ca853deeSEric Joyner return M_HASHTYPE_RSS_IPV4;
86*ca853deeSEric Joyner }
87*ca853deeSEric Joyner }
88*ca853deeSEric Joyner /* We should never get here! */
89*ca853deeSEric Joyner return M_HASHTYPE_OPAQUE;
90*ca853deeSEric Joyner }
91*ca853deeSEric Joyner
92*ca853deeSEric Joyner #endif /* _IAVF_TXRX_COMMON_H_ */
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