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 /*$FreeBSD$*/ 32 33 /** 34 * @file iavf_txrx_common.h 35 * @brief Tx/Rx hotpath functions common to legacy and iflib 36 * 37 * Contains implementations for functions used in the hotpath for both the 38 * legacy and iflib driver implementations. 39 */ 40 #ifndef _IAVF_TXRX_COMMON_H_ 41 #define _IAVF_TXRX_COMMON_H_ 42 43 #include "iavf_iflib.h" 44 45 static inline int iavf_ptype_to_hash(u8 ptype); 46 47 /** 48 * iavf_ptype_to_hash - parse the packet type 49 * @ptype: packet type 50 * 51 * Determine the appropriate hash for a given packet type 52 * 53 * @returns the M_HASHTYPE_* value for the given packet type. 54 */ 55 static inline int 56 iavf_ptype_to_hash(u8 ptype) 57 { 58 struct iavf_rx_ptype_decoded decoded; 59 60 decoded = decode_rx_desc_ptype(ptype); 61 62 if (!decoded.known) 63 return M_HASHTYPE_OPAQUE; 64 65 if (decoded.outer_ip == IAVF_RX_PTYPE_OUTER_L2) 66 return M_HASHTYPE_OPAQUE; 67 68 /* Note: anything that gets to this point is IP */ 69 if (decoded.outer_ip_ver == IAVF_RX_PTYPE_OUTER_IPV6) { 70 switch (decoded.inner_prot) { 71 case IAVF_RX_PTYPE_INNER_PROT_TCP: 72 return M_HASHTYPE_RSS_TCP_IPV6; 73 case IAVF_RX_PTYPE_INNER_PROT_UDP: 74 return M_HASHTYPE_RSS_UDP_IPV6; 75 default: 76 return M_HASHTYPE_RSS_IPV6; 77 } 78 } 79 if (decoded.outer_ip_ver == IAVF_RX_PTYPE_OUTER_IPV4) { 80 switch (decoded.inner_prot) { 81 case IAVF_RX_PTYPE_INNER_PROT_TCP: 82 return M_HASHTYPE_RSS_TCP_IPV4; 83 case IAVF_RX_PTYPE_INNER_PROT_UDP: 84 return M_HASHTYPE_RSS_UDP_IPV4; 85 default: 86 return M_HASHTYPE_RSS_IPV4; 87 } 88 } 89 /* We should never get here! */ 90 return M_HASHTYPE_OPAQUE; 91 } 92 93 #endif /* _IAVF_TXRX_COMMON_H_ */ 94