iwl-utils.h

 1/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
 2/*
 3 * Copyright (C) 2024-2025 Intel Corporation
 4 */
 5#ifndef __iwl_utils_h__
 6#define __iwl_utils_h__
 7
 8#include <net/cfg80211.h>
 9
10#ifdef CONFIG_INET
11/**
12 * iwl_tx_tso_segment - Segments a TSO packet into subframes for A-MSDU.
13 * @skb: buffer to segment.
14 * @num_subframes: number of subframes to create.
15 * @netdev_flags: netdev feature flags.
16 * @mpdus_skbs: list to hold the segmented subframes.
17 *
18 * This function segments a large TCP packet into subframes.
19 * subframes are added to the mpdus_skbs list
20 *
21 * Returns: 0 on success and negative value on failure.
22 */
23int iwl_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
24		       netdev_features_t netdev_flags,
25		       struct sk_buff_head *mpdus_skbs);
26#else
27static inline
28int iwl_tx_tso_segment(struct sk_buff *skb, unsigned int num_subframes,
29		       netdev_features_t netdev_flags,
30		       struct sk_buff_head *mpdus_skbs)
31{
32	WARN_ON(1);
33
34	return -1;
35}
36#endif /* CONFIG_INET */
37
38static inline
39u32 iwl_find_ie_offset(u8 *beacon, u8 eid, u32 frame_size)
40{
41	struct ieee80211_mgmt *mgmt = (void *)beacon;
42	const u8 *ie;
43
44	if (WARN_ON_ONCE(frame_size <= (mgmt->u.beacon.variable - beacon)))
45		return 0;
46
47	frame_size -= mgmt->u.beacon.variable - beacon;
48
49	ie = cfg80211_find_ie(eid, mgmt->u.beacon.variable, frame_size);
50	if (!ie)
51		return 0;
52
53	return ie - beacon;
54}
55
56s8 iwl_average_neg_dbm(const u8 *neg_dbm_values, u8 len);
57
58#endif /* __iwl_utils_h__ */