iavf_txrx_common.h

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    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_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/iavf/iavf_txrx_common.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/iavf/iavf_txrx_common.h