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		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
41const struct mlxfw_mfa2_tlv *
42mlxfw_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
54const struct mlxfw_mfa2_tlv *
55mlxfw_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
75int 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}