xref: /freebsd/sys/dev/iavf/iavf_txrx_common.h (revision ca853dee3b8f26f53d48d685f32ec0b8396369e8)
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
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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 /*$FreeBSD$*/
32*ca853deeSEric Joyner 
33*ca853deeSEric Joyner /**
34*ca853deeSEric Joyner  * @file iavf_txrx_common.h
35*ca853deeSEric Joyner  * @brief Tx/Rx hotpath functions common to legacy and iflib
36*ca853deeSEric Joyner  *
37*ca853deeSEric Joyner  * Contains implementations for functions used in the hotpath for both the
38*ca853deeSEric Joyner  * legacy and iflib driver implementations.
39*ca853deeSEric Joyner  */
40*ca853deeSEric Joyner #ifndef _IAVF_TXRX_COMMON_H_
41*ca853deeSEric Joyner #define _IAVF_TXRX_COMMON_H_
42*ca853deeSEric Joyner 
43*ca853deeSEric Joyner #include "iavf_iflib.h"
44*ca853deeSEric Joyner 
45*ca853deeSEric Joyner static inline int iavf_ptype_to_hash(u8 ptype);
46*ca853deeSEric Joyner 
47*ca853deeSEric Joyner /**
48*ca853deeSEric Joyner  * iavf_ptype_to_hash - parse the packet type
49*ca853deeSEric Joyner  * @ptype: packet type
50*ca853deeSEric Joyner  *
51*ca853deeSEric Joyner  * Determine the appropriate hash for a given packet type
52*ca853deeSEric Joyner  *
53*ca853deeSEric Joyner  * @returns the M_HASHTYPE_* value for the given packet type.
54*ca853deeSEric Joyner  */
55*ca853deeSEric Joyner static inline int
56*ca853deeSEric Joyner iavf_ptype_to_hash(u8 ptype)
57*ca853deeSEric Joyner {
58*ca853deeSEric Joyner         struct iavf_rx_ptype_decoded decoded;
59*ca853deeSEric Joyner 
60*ca853deeSEric Joyner 	decoded = decode_rx_desc_ptype(ptype);
61*ca853deeSEric Joyner 
62*ca853deeSEric Joyner 	if (!decoded.known)
63*ca853deeSEric Joyner 		return M_HASHTYPE_OPAQUE;
64*ca853deeSEric Joyner 
65*ca853deeSEric Joyner 	if (decoded.outer_ip == IAVF_RX_PTYPE_OUTER_L2)
66*ca853deeSEric Joyner 		return M_HASHTYPE_OPAQUE;
67*ca853deeSEric Joyner 
68*ca853deeSEric Joyner 	/* Note: anything that gets to this point is IP */
69*ca853deeSEric Joyner         if (decoded.outer_ip_ver == IAVF_RX_PTYPE_OUTER_IPV6) {
70*ca853deeSEric Joyner 		switch (decoded.inner_prot) {
71*ca853deeSEric Joyner 		case IAVF_RX_PTYPE_INNER_PROT_TCP:
72*ca853deeSEric Joyner 			return M_HASHTYPE_RSS_TCP_IPV6;
73*ca853deeSEric Joyner 		case IAVF_RX_PTYPE_INNER_PROT_UDP:
74*ca853deeSEric Joyner 			return M_HASHTYPE_RSS_UDP_IPV6;
75*ca853deeSEric Joyner 		default:
76*ca853deeSEric Joyner 			return M_HASHTYPE_RSS_IPV6;
77*ca853deeSEric Joyner 		}
78*ca853deeSEric Joyner 	}
79*ca853deeSEric Joyner         if (decoded.outer_ip_ver == IAVF_RX_PTYPE_OUTER_IPV4) {
80*ca853deeSEric Joyner 		switch (decoded.inner_prot) {
81*ca853deeSEric Joyner 		case IAVF_RX_PTYPE_INNER_PROT_TCP:
82*ca853deeSEric Joyner 			return M_HASHTYPE_RSS_TCP_IPV4;
83*ca853deeSEric Joyner 		case IAVF_RX_PTYPE_INNER_PROT_UDP:
84*ca853deeSEric Joyner 			return M_HASHTYPE_RSS_UDP_IPV4;
85*ca853deeSEric Joyner 		default:
86*ca853deeSEric Joyner 			return M_HASHTYPE_RSS_IPV4;
87*ca853deeSEric Joyner 		}
88*ca853deeSEric Joyner 	}
89*ca853deeSEric Joyner 	/* We should never get here! */
90*ca853deeSEric Joyner 	return M_HASHTYPE_OPAQUE;
91*ca853deeSEric Joyner }
92*ca853deeSEric Joyner 
93*ca853deeSEric Joyner #endif /* _IAVF_TXRX_COMMON_H_ */
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