119 lines · c
1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause2/*3 * Copyright (C) 2005-2014, 2018-2021, 2023 Intel Corporation4 * Copyright (C) 2015 Intel Mobile Communications GmbH5 */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 13int 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}34IWL_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 39void 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 else52 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}118IWL_EXPORT_SYMBOL(iwl_init_ht_hw_capab);119