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/*
* drivers/net/ethernet/mellanox/mlxfw/mlxfw_mfa2_tlv_multi.c
* Copyright (c) 2017 Mellanox Technologies. All rights reserved.
* Copyright (c) 2017 Yotam Gigi <yotamg@mellanox.com>
*
* 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 names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
*/
#define pr_fmt(fmt) "MFA2: " fmt
#include "mlxfw_mfa2_tlv_multi.h"
#include <uapi/linux/netlink.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, (void *) 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;
void *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 = (void *) 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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