drivers/net/wireless/intel/iwlwifi/iwl-nvm-utils.c

   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
  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
  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);