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 #define pr_fmt(fmt) "MFA2: " fmt 35 36 #include "mlxfw_mfa2_tlv_multi.h" 37 38 #define MLXFW_MFA2_TLV_TOTAL_SIZE(tlv) \ 39 NLA_ALIGN(sizeof(*(tlv)) + be16_to_cpu((tlv)->len)) 40 41 const struct mlxfw_mfa2_tlv * 42 mlxfw_mfa2_tlv_multi_child(const struct mlxfw_mfa2_file *mfa2_file, 43 const struct mlxfw_mfa2_tlv_multi *multi) 44 { 45 size_t multi_len; 46 47 multi_len = NLA_ALIGN(sizeof(struct mlxfw_mfa2_tlv_multi)); 48 return mlxfw_mfa2_tlv_get(mfa2_file, (const u8 *) multi + multi_len); 49 } 50 51 const struct mlxfw_mfa2_tlv * 52 mlxfw_mfa2_tlv_next(const struct mlxfw_mfa2_file *mfa2_file, 53 const struct mlxfw_mfa2_tlv *tlv) 54 { 55 const struct mlxfw_mfa2_tlv_multi *multi; 56 u16 tlv_len; 57 const u8 *next; 58 59 tlv_len = MLXFW_MFA2_TLV_TOTAL_SIZE(tlv); 60 61 if (tlv->type == MLXFW_MFA2_TLV_MULTI_PART) { 62 multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, tlv); 63 if (!multi) 64 return NULL; 65 tlv_len = NLA_ALIGN(tlv_len + be16_to_cpu(multi->total_len)); 66 } 67 68 next = (const u8 *) tlv + tlv_len; 69 return mlxfw_mfa2_tlv_get(mfa2_file, next); 70 } 71 72 const struct mlxfw_mfa2_tlv * 73 mlxfw_mfa2_tlv_advance(const struct mlxfw_mfa2_file *mfa2_file, 74 const struct mlxfw_mfa2_tlv *from_tlv, u16 count) 75 { 76 const struct mlxfw_mfa2_tlv *tlv; 77 u16 idx; 78 79 mlxfw_mfa2_tlv_foreach(mfa2_file, tlv, idx, from_tlv, count) 80 if (!tlv) 81 return NULL; 82 return tlv; 83 } 84 85 const struct mlxfw_mfa2_tlv * 86 mlxfw_mfa2_tlv_multi_child_find(const struct mlxfw_mfa2_file *mfa2_file, 87 const struct mlxfw_mfa2_tlv_multi *multi, 88 enum mlxfw_mfa2_tlv_type type, u16 index) 89 { 90 const struct mlxfw_mfa2_tlv *tlv; 91 u16 skip = 0; 92 u16 idx; 93 94 mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) { 95 if (!tlv) { 96 pr_err("TLV parsing error\n"); 97 return NULL; 98 } 99 if (tlv->type == type) 100 if (skip++ == index) 101 return tlv; 102 } 103 return NULL; 104 } 105 106 int mlxfw_mfa2_tlv_multi_child_count(const struct mlxfw_mfa2_file *mfa2_file, 107 const struct mlxfw_mfa2_tlv_multi *multi, 108 enum mlxfw_mfa2_tlv_type type, 109 u16 *p_count) 110 { 111 const struct mlxfw_mfa2_tlv *tlv; 112 u16 count = 0; 113 u16 idx; 114 115 mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) { 116 if (!tlv) { 117 pr_err("TLV parsing error\n"); 118 return -EINVAL; 119 } 120 121 if (tlv->type == type) 122 count++; 123 } 124 *p_count = count; 125 return 0; 126 } 127