FreeBSD/Linux Kernel Cross Reference
sys/dev/mlxfw/mlxfw_mfa2_tlv_multi.c

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 2017-2019 Mellanox Technologies.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of Mellanox nor the names of contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #define pr_fmt(fmt) "MFA2: " fmt
    
    #include "mlxfw_mfa2_tlv_multi.h"
    
    #define MLXFW_MFA2_TLV_TOTAL_SIZE(tlv) \
            NLA_ALIGN(sizeof(*(tlv)) + be16_to_cpu((tlv)->len))
    
    const struct mlxfw_mfa2_tlv *
    mlxfw_mfa2_tlv_multi_child(const struct mlxfw_mfa2_file *mfa2_file,
                               const struct mlxfw_mfa2_tlv_multi *multi)
    {
            size_t multi_len;
    
            multi_len = NLA_ALIGN(sizeof(struct mlxfw_mfa2_tlv_multi));
            return mlxfw_mfa2_tlv_get(mfa2_file, (const u8 *) multi + multi_len);
    }
    
    const struct mlxfw_mfa2_tlv *
    mlxfw_mfa2_tlv_next(const struct mlxfw_mfa2_file *mfa2_file,
                        const struct mlxfw_mfa2_tlv *tlv)
    {
            const struct mlxfw_mfa2_tlv_multi *multi;
            u16 tlv_len;
            const u8 *next;
    
            tlv_len = MLXFW_MFA2_TLV_TOTAL_SIZE(tlv);
    
            if (tlv->type == MLXFW_MFA2_TLV_MULTI_PART) {
                    multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, tlv);
                    tlv_len = NLA_ALIGN(tlv_len + be16_to_cpu(multi->total_len));
            }
    
            next = (const u8 *) tlv + tlv_len;
            return mlxfw_mfa2_tlv_get(mfa2_file, next);
    }
    
    const struct mlxfw_mfa2_tlv *
    mlxfw_mfa2_tlv_advance(const struct mlxfw_mfa2_file *mfa2_file,
                           const struct mlxfw_mfa2_tlv *from_tlv, u16 count)
    {
            const struct mlxfw_mfa2_tlv *tlv;
            u16 idx;
    
            mlxfw_mfa2_tlv_foreach(mfa2_file, tlv, idx, from_tlv, count)
                    if (!tlv)
                            return NULL;
            return tlv;
    }
    
    const struct mlxfw_mfa2_tlv *
    mlxfw_mfa2_tlv_multi_child_find(const struct mlxfw_mfa2_file *mfa2_file,
                                    const struct mlxfw_mfa2_tlv_multi *multi,
                                    enum mlxfw_mfa2_tlv_type type, u16 index)
    {
            const struct mlxfw_mfa2_tlv *tlv;
            u16 skip = 0;
            u16 idx;
    
            mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) {
                    if (!tlv) {
                            pr_err("TLV parsing error\n");
                            return NULL;
                    }
                    if (tlv->type == type)
                            if (skip++ == index)
                                    return tlv;
           }
           return NULL;
   }
   
   int mlxfw_mfa2_tlv_multi_child_count(const struct mlxfw_mfa2_file *mfa2_file,
                                        const struct mlxfw_mfa2_tlv_multi *multi,
                                        enum mlxfw_mfa2_tlv_type type,
                                        u16 *p_count)
   {
           const struct mlxfw_mfa2_tlv *tlv;
           u16 count = 0;
           u16 idx;
   
           mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) {
                   if (!tlv) {
                           pr_err("TLV parsing error\n");
                           return -EINVAL;
                   }
   
                   if (tlv->type == type)
                           count++;
           }
           *p_count = count;
           return 0;
   }

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