mlxfw_mfa2_tlv.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 2017-2019 Mellanox Technologies.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of Mellanox nor the names of contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * 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 AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * $FreeBSD$
   32  */
   33 
   34 #ifndef _MLXFW_MFA2_TLV_H
   35 #define _MLXFW_MFA2_TLV_H
   36 
   37 #include <linux/kernel.h>
   38 #include "mlxfw_mfa2_file.h"
   39 
   40 struct mlxfw_mfa2_tlv {
   41         u8 version;
   42         u8 type;
   43         __be16 len;
   44         u8 data[0];
   45 } __packed;
   46 
   47 static inline const struct mlxfw_mfa2_tlv *
   48 mlxfw_mfa2_tlv_get(const struct mlxfw_mfa2_file *mfa2_file, const u8 *ptr)
   49 {
   50         if (!mlxfw_mfa2_valid_ptr(mfa2_file, ptr) ||
   51             !mlxfw_mfa2_valid_ptr(mfa2_file, ptr + sizeof(struct mlxfw_mfa2_tlv)))
   52                 return NULL;
   53         return (const struct mlxfw_mfa2_tlv *) ptr;
   54 }
   55 
   56 static inline const void *
   57 mlxfw_mfa2_tlv_payload_get(const struct mlxfw_mfa2_file *mfa2_file,
   58                            const struct mlxfw_mfa2_tlv *tlv, u8 payload_type,
   59                            size_t payload_size, bool varsize)
   60 {
   61         const u8 *tlv_top;
   62 
   63         tlv_top = (const u8 *) tlv + be16_to_cpu(tlv->len) - 1;
   64         if (!mlxfw_mfa2_valid_ptr(mfa2_file, (const u8 *) tlv) ||
   65             !mlxfw_mfa2_valid_ptr(mfa2_file, tlv_top))
   66                 return NULL;
   67         if (tlv->type != payload_type)
   68                 return NULL;
   69         if (varsize && (be16_to_cpu(tlv->len) < payload_size))
   70                 return NULL;
   71         if (!varsize && (be16_to_cpu(tlv->len) != payload_size))
   72                 return NULL;
   73 
   74         return tlv->data;
   75 }
   76 
   77 #define MLXFW_MFA2_TLV(name, payload_type, tlv_type)                           \
   78 static inline const payload_type *                                             \
   79 mlxfw_mfa2_tlv_ ## name ## _get(const struct mlxfw_mfa2_file *mfa2_file,       \
   80                                 const struct mlxfw_mfa2_tlv *tlv)              \
   81 {                                                                              \
   82         return mlxfw_mfa2_tlv_payload_get(mfa2_file, tlv,                      \
   83                                           tlv_type, sizeof(payload_type),      \
   84                                           false);                              \
   85 }
   86 
   87 #define MLXFW_MFA2_TLV_VARSIZE(name, payload_type, tlv_type)                   \
   88 static inline const payload_type *                                             \
   89 mlxfw_mfa2_tlv_ ## name ## _get(const struct mlxfw_mfa2_file *mfa2_file,       \
   90                                 const struct mlxfw_mfa2_tlv *tlv)              \
   91 {                                                                              \
   92         return mlxfw_mfa2_tlv_payload_get(mfa2_file, tlv,                      \
   93                                           tlv_type, sizeof(payload_type),      \
   94                                           true);                               \
   95 }
   96 
   97 #endif

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FreeBSD/Linux Kernel Cross Reference sys/dev/mlxfw/mlxfw_mfa2_tlv.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/mlxfw/mlxfw_mfa2_tlv.h