1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2005-2014, 2018-2021, 2023 Intel Corporation
4 * Copyright (C) 2015 Intel Mobile Communications GmbH
5 */
6 #include <linux/types.h>
7 #include <linux/slab.h>
8 #include <linux/export.h>
9 #include "iwl-drv.h"
10 #include "iwl-modparams.h"
11 #include "iwl-nvm-utils.h"
12
iwl_init_sband_channels(struct iwl_nvm_data * data,struct ieee80211_supported_band * sband,int n_channels,enum nl80211_band band)13 int iwl_init_sband_channels(struct iwl_nvm_data *data,
14 struct ieee80211_supported_band *sband,
15 int n_channels, enum nl80211_band band)
16 {
17 struct ieee80211_channel *chan = &data->channels[0];
18 int n = 0, idx = 0;
19
20 while (idx < n_channels && chan->band != band)
21 chan = &data->channels[++idx];
22
23 sband->channels = &data->channels[idx];
24
25 while (idx < n_channels && chan->band == band) {
26 chan = &data->channels[++idx];
27 n++;
28 }
29
30 sband->n_channels = n;
31
32 return n;
33 }
34 IWL_EXPORT_SYMBOL(iwl_init_sband_channels);
35
36 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
37 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
38
iwl_init_ht_hw_capab(struct iwl_trans * trans,struct iwl_nvm_data * data,struct ieee80211_sta_ht_cap * ht_info,enum nl80211_band band,u8 tx_chains,u8 rx_chains)39 void iwl_init_ht_hw_capab(struct iwl_trans *trans,
40 struct iwl_nvm_data *data,
41 struct ieee80211_sta_ht_cap *ht_info,
42 enum nl80211_band band,
43 u8 tx_chains, u8 rx_chains)
44 {
45 const struct iwl_cfg *cfg = trans->cfg;
46 int max_bit_rate = 0;
47
48 tx_chains = hweight8(tx_chains);
49 if (cfg->rx_with_siso_diversity)
50 rx_chains = 1;
51 else
52 rx_chains = hweight8(rx_chains);
53
54 if (!(data->sku_cap_11n_enable) ||
55 (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_ALL) ||
56 !cfg->ht_params) {
57 ht_info->ht_supported = false;
58 return;
59 }
60
61 if (data->sku_cap_mimo_disabled)
62 rx_chains = 1;
63
64 ht_info->ht_supported = true;
65 ht_info->cap = IEEE80211_HT_CAP_DSSSCCK40;
66
67 if (cfg->ht_params->stbc) {
68 ht_info->cap |= (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
69
70 if (tx_chains > 1)
71 ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
72 }
73
74 if (cfg->ht_params->ldpc)
75 ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;
76
77 if (trans->trans_cfg->mq_rx_supported ||
78 iwlwifi_mod_params.amsdu_size >= IWL_AMSDU_8K)
79 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
80
81 ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
82 ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
83
84 ht_info->mcs.rx_mask[0] = 0xFF;
85 ht_info->mcs.rx_mask[1] = 0x00;
86 ht_info->mcs.rx_mask[2] = 0x00;
87
88 if (rx_chains >= 2)
89 ht_info->mcs.rx_mask[1] = 0xFF;
90 if (rx_chains >= 3)
91 ht_info->mcs.rx_mask[2] = 0xFF;
92
93 if (cfg->ht_params->ht_greenfield_support)
94 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
95 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
96
97 max_bit_rate = MAX_BIT_RATE_20_MHZ;
98
99 if (cfg->ht_params->ht40_bands & BIT(band)) {
100 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
101 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
102 max_bit_rate = MAX_BIT_RATE_40_MHZ;
103 }
104
105 /* Highest supported Rx data rate */
106 max_bit_rate *= rx_chains;
107 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
108 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
109
110 /* Tx MCS capabilities */
111 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
112 if (tx_chains != rx_chains) {
113 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
114 ht_info->mcs.tx_params |= ((tx_chains - 1) <<
115 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
116 }
117 }
118 IWL_EXPORT_SYMBOL(iwl_init_ht_hw_capab);
119