1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /* Copyright (c) 2017-2019 Mellanox Technologies. All rights reserved */ 3 4 #define pr_fmt(fmt) "MFA2: " fmt 5 6 #include "mlxfw_mfa2_tlv_multi.h" 7 #include <uapi/linux/netlink.h> 8 9 #define MLXFW_MFA2_TLV_TOTAL_SIZE(tlv) \ 10 NLA_ALIGN(sizeof(*(tlv)) + be16_to_cpu((tlv)->len)) 11 12 const struct mlxfw_mfa2_tlv * 13 mlxfw_mfa2_tlv_multi_child(const struct mlxfw_mfa2_file *mfa2_file, 14 const struct mlxfw_mfa2_tlv_multi *multi) 15 { 16 size_t multi_len; 17 18 multi_len = NLA_ALIGN(sizeof(struct mlxfw_mfa2_tlv_multi)); 19 return mlxfw_mfa2_tlv_get(mfa2_file, (void *) multi + multi_len); 20 } 21 22 const struct mlxfw_mfa2_tlv * 23 mlxfw_mfa2_tlv_next(const struct mlxfw_mfa2_file *mfa2_file, 24 const struct mlxfw_mfa2_tlv *tlv) 25 { 26 const struct mlxfw_mfa2_tlv_multi *multi; 27 u16 tlv_len; 28 void *next; 29 30 tlv_len = MLXFW_MFA2_TLV_TOTAL_SIZE(tlv); 31 32 if (tlv->type == MLXFW_MFA2_TLV_MULTI_PART) { 33 multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, tlv); 34 tlv_len = NLA_ALIGN(tlv_len + be16_to_cpu(multi->total_len)); 35 } 36 37 next = (void *) tlv + tlv_len; 38 return mlxfw_mfa2_tlv_get(mfa2_file, next); 39 } 40 41 const struct mlxfw_mfa2_tlv * 42 mlxfw_mfa2_tlv_advance(const struct mlxfw_mfa2_file *mfa2_file, 43 const struct mlxfw_mfa2_tlv *from_tlv, u16 count) 44 { 45 const struct mlxfw_mfa2_tlv *tlv; 46 u16 idx; 47 48 mlxfw_mfa2_tlv_foreach(mfa2_file, tlv, idx, from_tlv, count) 49 if (!tlv) 50 return NULL; 51 return tlv; 52 } 53 54 const struct mlxfw_mfa2_tlv * 55 mlxfw_mfa2_tlv_multi_child_find(const struct mlxfw_mfa2_file *mfa2_file, 56 const struct mlxfw_mfa2_tlv_multi *multi, 57 enum mlxfw_mfa2_tlv_type type, u16 index) 58 { 59 const struct mlxfw_mfa2_tlv *tlv; 60 u16 skip = 0; 61 u16 idx; 62 63 mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) { 64 if (!tlv) { 65 pr_err("TLV parsing error\n"); 66 return NULL; 67 } 68 if (tlv->type == type) 69 if (skip++ == index) 70 return tlv; 71 } 72 return NULL; 73 } 74 75 int mlxfw_mfa2_tlv_multi_child_count(const struct mlxfw_mfa2_file *mfa2_file, 76 const struct mlxfw_mfa2_tlv_multi *multi, 77 enum mlxfw_mfa2_tlv_type type, 78 u16 *p_count) 79 { 80 const struct mlxfw_mfa2_tlv *tlv; 81 u16 count = 0; 82 u16 idx; 83 84 mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) { 85 if (!tlv) { 86 pr_err("TLV parsing error\n"); 87 return -EINVAL; 88 } 89 90 if (tlv->type == type) 91 count++; 92 } 93 *p_count = count; 94 return 0; 95 } 96