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
12const struct mlxfw_mfa2_tlv *
13mlxfw_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
22const struct mlxfw_mfa2_tlv *
23mlxfw_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		if (!multi)
35			return NULL;
36		tlv_len = NLA_ALIGN(tlv_len + be16_to_cpu(multi->total_len));
37	}
38
39	next = (void *) tlv + tlv_len;
40	return mlxfw_mfa2_tlv_get(mfa2_file, next);
41}
42
43const struct mlxfw_mfa2_tlv *
44mlxfw_mfa2_tlv_advance(const struct mlxfw_mfa2_file *mfa2_file,
45		       const struct mlxfw_mfa2_tlv *from_tlv, u16 count)
46{
47	const struct mlxfw_mfa2_tlv *tlv;
48	u16 idx;
49
50	mlxfw_mfa2_tlv_foreach(mfa2_file, tlv, idx, from_tlv, count)
51		if (!tlv)
52			return NULL;
53	return tlv;
54}
55
56const struct mlxfw_mfa2_tlv *
57mlxfw_mfa2_tlv_multi_child_find(const struct mlxfw_mfa2_file *mfa2_file,
58				const struct mlxfw_mfa2_tlv_multi *multi,
59				enum mlxfw_mfa2_tlv_type type, u16 index)
60{
61	const struct mlxfw_mfa2_tlv *tlv;
62	u16 skip = 0;
63	u16 idx;
64
65	mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) {
66		if (!tlv) {
67			pr_err("TLV parsing error\n");
68			return NULL;
69		}
70		if (tlv->type == type)
71			if (skip++ == index)
72				return tlv;
73	}
74	return NULL;
75}
76
77int mlxfw_mfa2_tlv_multi_child_count(const struct mlxfw_mfa2_file *mfa2_file,
78				     const struct mlxfw_mfa2_tlv_multi *multi,
79				     enum mlxfw_mfa2_tlv_type type,
80				     u16 *p_count)
81{
82	const struct mlxfw_mfa2_tlv *tlv;
83	u16 count = 0;
84	u16 idx;
85
86	mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) {
87		if (!tlv) {
88			pr_err("TLV parsing error\n");
89			return -EINVAL;
90		}
91
92		if (tlv->type == type)
93			count++;
94	}
95	*p_count = count;
96	return 0;
97}
98