cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

mlxfw_mfa2_tlv_multi.c (2354B)

      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}