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 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