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474 lines
14 KiB
474 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause |
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/* |
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* Copyright (C) 2017 Intel Deutschland GmbH |
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* Copyright (C) 2018-2021 Intel Corporation |
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*/ |
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#include "rs.h" |
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#include "fw-api.h" |
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#include "sta.h" |
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#include "iwl-op-mode.h" |
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#include "mvm.h" |
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|
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static u8 rs_fw_bw_from_sta_bw(struct ieee80211_sta *sta) |
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{ |
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switch (sta->bandwidth) { |
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case IEEE80211_STA_RX_BW_160: |
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return IWL_TLC_MNG_CH_WIDTH_160MHZ; |
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case IEEE80211_STA_RX_BW_80: |
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return IWL_TLC_MNG_CH_WIDTH_80MHZ; |
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case IEEE80211_STA_RX_BW_40: |
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return IWL_TLC_MNG_CH_WIDTH_40MHZ; |
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case IEEE80211_STA_RX_BW_20: |
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default: |
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return IWL_TLC_MNG_CH_WIDTH_20MHZ; |
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} |
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} |
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static u8 rs_fw_set_active_chains(u8 chains) |
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{ |
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u8 fw_chains = 0; |
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if (chains & ANT_A) |
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fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK; |
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if (chains & ANT_B) |
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fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK; |
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if (chains & ANT_C) |
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WARN(false, |
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"tlc offload doesn't support antenna C. chains: 0x%x\n", |
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chains); |
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return fw_chains; |
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} |
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static u8 rs_fw_sgi_cw_support(struct ieee80211_sta *sta) |
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{ |
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struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
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struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; |
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struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; |
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u8 supp = 0; |
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if (he_cap->has_he) |
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return 0; |
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if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20) |
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supp |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ); |
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if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40) |
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supp |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ); |
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if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80) |
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supp |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ); |
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if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160) |
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supp |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ); |
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return supp; |
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} |
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static u16 rs_fw_get_config_flags(struct iwl_mvm *mvm, |
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struct ieee80211_sta *sta, |
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struct ieee80211_supported_band *sband) |
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{ |
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struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
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struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; |
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struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; |
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bool vht_ena = vht_cap->vht_supported; |
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u16 flags = 0; |
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/* get STBC flags */ |
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if (mvm->cfg->ht_params->stbc && |
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(num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1)) { |
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if (he_cap->has_he && he_cap->he_cap_elem.phy_cap_info[2] & |
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IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ) |
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flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; |
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else if (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK) |
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flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; |
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else if (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC) |
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flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; |
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} |
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if (mvm->cfg->ht_params->ldpc && |
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((ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING) || |
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(vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)))) |
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flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; |
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|
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/* consider LDPC support in case of HE */ |
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if (he_cap->has_he && (he_cap->he_cap_elem.phy_cap_info[1] & |
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IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD)) |
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flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; |
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if (sband->iftype_data && sband->iftype_data->he_cap.has_he && |
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!(sband->iftype_data->he_cap.he_cap_elem.phy_cap_info[1] & |
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IEEE80211_HE_PHY_CAP1_LDPC_CODING_IN_PAYLOAD)) |
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flags &= ~IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; |
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if (he_cap->has_he && |
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(he_cap->he_cap_elem.phy_cap_info[3] & |
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IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_MASK)) |
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flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK; |
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return flags; |
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} |
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static |
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int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap, |
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int nss) |
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{ |
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u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & |
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(0x3 << (2 * (nss - 1))); |
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rx_mcs >>= (2 * (nss - 1)); |
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switch (rx_mcs) { |
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case IEEE80211_VHT_MCS_SUPPORT_0_7: |
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return IWL_TLC_MNG_HT_RATE_MCS7; |
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case IEEE80211_VHT_MCS_SUPPORT_0_8: |
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return IWL_TLC_MNG_HT_RATE_MCS8; |
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case IEEE80211_VHT_MCS_SUPPORT_0_9: |
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return IWL_TLC_MNG_HT_RATE_MCS9; |
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default: |
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WARN_ON_ONCE(1); |
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break; |
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} |
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return 0; |
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} |
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static void |
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rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta, |
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const struct ieee80211_sta_vht_cap *vht_cap, |
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struct iwl_tlc_config_cmd *cmd) |
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{ |
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u16 supp; |
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int i, highest_mcs; |
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u8 max_nss = sta->rx_nss; |
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struct ieee80211_vht_cap ieee_vht_cap = { |
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.vht_cap_info = cpu_to_le32(vht_cap->cap), |
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.supp_mcs = vht_cap->vht_mcs, |
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}; |
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/* the station support only a single receive chain */ |
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if (sta->smps_mode == IEEE80211_SMPS_STATIC) |
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max_nss = 1; |
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for (i = 0; i < max_nss && i < IWL_TLC_NSS_MAX; i++) { |
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int nss = i + 1; |
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highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, nss); |
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if (!highest_mcs) |
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continue; |
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supp = BIT(highest_mcs + 1) - 1; |
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if (sta->bandwidth == IEEE80211_STA_RX_BW_20) |
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supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9); |
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cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160] = cpu_to_le16(supp); |
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/* |
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* Check if VHT extended NSS indicates that the bandwidth/NSS |
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* configuration is supported - only for MCS 0 since we already |
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* decoded the MCS bits anyway ourselves. |
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*/ |
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if (sta->bandwidth == IEEE80211_STA_RX_BW_160 && |
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ieee80211_get_vht_max_nss(&ieee_vht_cap, |
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IEEE80211_VHT_CHANWIDTH_160MHZ, |
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0, true, nss) >= nss) |
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cmd->ht_rates[i][IWL_TLC_HT_BW_160] = |
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cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160]; |
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} |
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} |
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static u16 rs_fw_he_ieee80211_mcs_to_rs_mcs(u16 mcs) |
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{ |
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switch (mcs) { |
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case IEEE80211_HE_MCS_SUPPORT_0_7: |
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return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1; |
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case IEEE80211_HE_MCS_SUPPORT_0_9: |
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return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1; |
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case IEEE80211_HE_MCS_SUPPORT_0_11: |
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return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1; |
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case IEEE80211_HE_MCS_NOT_SUPPORTED: |
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return 0; |
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} |
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WARN(1, "invalid HE MCS %d\n", mcs); |
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return 0; |
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} |
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static void |
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rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta, |
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struct ieee80211_supported_band *sband, |
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struct iwl_tlc_config_cmd *cmd) |
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{ |
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const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; |
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u16 mcs_160 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); |
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u16 mcs_80 = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); |
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u16 tx_mcs_80 = |
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le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_80); |
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u16 tx_mcs_160 = |
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le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_160); |
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int i; |
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u8 nss = sta->rx_nss; |
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/* the station support only a single receive chain */ |
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if (sta->smps_mode == IEEE80211_SMPS_STATIC) |
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nss = 1; |
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for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) { |
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u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3; |
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u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3; |
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u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3; |
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u16 _tx_mcs_80 = (tx_mcs_80 >> (2 * i)) & 0x3; |
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/* If one side doesn't support - mark both as not supporting */ |
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if (_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED || |
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_tx_mcs_80 == IEEE80211_HE_MCS_NOT_SUPPORTED) { |
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_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED; |
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_tx_mcs_80 = IEEE80211_HE_MCS_NOT_SUPPORTED; |
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} |
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if (_mcs_80 > _tx_mcs_80) |
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_mcs_80 = _tx_mcs_80; |
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cmd->ht_rates[i][IWL_TLC_HT_BW_NONE_160] = |
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cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_80)); |
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/* If one side doesn't support - mark both as not supporting */ |
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if (_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED || |
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_tx_mcs_160 == IEEE80211_HE_MCS_NOT_SUPPORTED) { |
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_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED; |
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_tx_mcs_160 = IEEE80211_HE_MCS_NOT_SUPPORTED; |
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} |
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if (_mcs_160 > _tx_mcs_160) |
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_mcs_160 = _tx_mcs_160; |
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cmd->ht_rates[i][IWL_TLC_HT_BW_160] = |
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cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_160)); |
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} |
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} |
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static void rs_fw_set_supp_rates(struct ieee80211_sta *sta, |
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struct ieee80211_supported_band *sband, |
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struct iwl_tlc_config_cmd *cmd) |
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{ |
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int i; |
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u16 supp = 0; |
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unsigned long tmp; /* must be unsigned long for for_each_set_bit */ |
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const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
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const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; |
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const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; |
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/* non HT rates */ |
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tmp = sta->supp_rates[sband->band]; |
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for_each_set_bit(i, &tmp, BITS_PER_LONG) |
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supp |= BIT(sband->bitrates[i].hw_value); |
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cmd->non_ht_rates = cpu_to_le16(supp); |
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cmd->mode = IWL_TLC_MNG_MODE_NON_HT; |
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/* HT/VHT rates */ |
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if (he_cap->has_he) { |
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cmd->mode = IWL_TLC_MNG_MODE_HE; |
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rs_fw_he_set_enabled_rates(sta, sband, cmd); |
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} else if (vht_cap->vht_supported) { |
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cmd->mode = IWL_TLC_MNG_MODE_VHT; |
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rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd); |
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} else if (ht_cap->ht_supported) { |
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cmd->mode = IWL_TLC_MNG_MODE_HT; |
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cmd->ht_rates[IWL_TLC_NSS_1][IWL_TLC_HT_BW_NONE_160] = |
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cpu_to_le16(ht_cap->mcs.rx_mask[0]); |
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/* the station support only a single receive chain */ |
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if (sta->smps_mode == IEEE80211_SMPS_STATIC) |
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cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] = |
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0; |
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else |
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cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] = |
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cpu_to_le16(ht_cap->mcs.rx_mask[1]); |
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} |
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} |
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void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, |
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struct iwl_rx_cmd_buffer *rxb) |
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{ |
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struct iwl_rx_packet *pkt = rxb_addr(rxb); |
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struct iwl_tlc_update_notif *notif; |
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struct ieee80211_sta *sta; |
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struct iwl_mvm_sta *mvmsta; |
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struct iwl_lq_sta_rs_fw *lq_sta; |
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u32 flags; |
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rcu_read_lock(); |
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notif = (void *)pkt->data; |
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sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]); |
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if (IS_ERR_OR_NULL(sta)) { |
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IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", |
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notif->sta_id); |
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goto out; |
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} |
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mvmsta = iwl_mvm_sta_from_mac80211(sta); |
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if (!mvmsta) { |
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IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", |
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notif->sta_id); |
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goto out; |
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} |
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flags = le32_to_cpu(notif->flags); |
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lq_sta = &mvmsta->lq_sta.rs_fw; |
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if (flags & IWL_TLC_NOTIF_FLAG_RATE) { |
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char pretty_rate[100]; |
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lq_sta->last_rate_n_flags = le32_to_cpu(notif->rate); |
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rs_pretty_print_rate(pretty_rate, sizeof(pretty_rate), |
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lq_sta->last_rate_n_flags); |
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IWL_DEBUG_RATE(mvm, "new rate: %s\n", pretty_rate); |
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} |
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if (flags & IWL_TLC_NOTIF_FLAG_AMSDU && !mvmsta->orig_amsdu_len) { |
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u16 size = le32_to_cpu(notif->amsdu_size); |
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int i; |
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if (sta->max_amsdu_len < size) { |
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/* |
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* In debug sta->max_amsdu_len < size |
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* so also check with orig_amsdu_len which holds the |
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* original data before debugfs changed the value |
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*/ |
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WARN_ON(mvmsta->orig_amsdu_len < size); |
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goto out; |
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} |
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mvmsta->amsdu_enabled = le32_to_cpu(notif->amsdu_enabled); |
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mvmsta->max_amsdu_len = size; |
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sta->max_rc_amsdu_len = mvmsta->max_amsdu_len; |
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for (i = 0; i < IWL_MAX_TID_COUNT; i++) { |
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if (mvmsta->amsdu_enabled & BIT(i)) |
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sta->max_tid_amsdu_len[i] = |
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iwl_mvm_max_amsdu_size(mvm, sta, i); |
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else |
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/* |
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* Not so elegant, but this will effectively |
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* prevent AMSDU on this TID |
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*/ |
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sta->max_tid_amsdu_len[i] = 1; |
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} |
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IWL_DEBUG_RATE(mvm, |
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"AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n", |
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le32_to_cpu(notif->amsdu_size), size, |
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mvmsta->amsdu_enabled); |
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} |
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out: |
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rcu_read_unlock(); |
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} |
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u16 rs_fw_get_max_amsdu_len(struct ieee80211_sta *sta) |
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{ |
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struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
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const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; |
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const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; |
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if (mvmsta->vif->bss_conf.chandef.chan->band == NL80211_BAND_6GHZ) { |
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switch (le16_get_bits(sta->he_6ghz_capa.capa, |
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IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) { |
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: |
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return IEEE80211_MAX_MPDU_LEN_VHT_11454; |
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: |
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return IEEE80211_MAX_MPDU_LEN_VHT_7991; |
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default: |
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return IEEE80211_MAX_MPDU_LEN_VHT_3895; |
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} |
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} else |
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if (vht_cap->vht_supported) { |
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switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) { |
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: |
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return IEEE80211_MAX_MPDU_LEN_VHT_11454; |
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: |
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return IEEE80211_MAX_MPDU_LEN_VHT_7991; |
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default: |
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return IEEE80211_MAX_MPDU_LEN_VHT_3895; |
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} |
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} else if (ht_cap->ht_supported) { |
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if (ht_cap->cap & IEEE80211_HT_CAP_MAX_AMSDU) |
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/* |
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* agg is offloaded so we need to assume that agg |
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* are enabled and max mpdu in ampdu is 4095 |
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* (spec 802.11-2016 9.3.2.1) |
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*/ |
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return IEEE80211_MAX_MPDU_LEN_HT_BA; |
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else |
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return IEEE80211_MAX_MPDU_LEN_HT_3839; |
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} |
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|
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/* in legacy mode no amsdu is enabled so return zero */ |
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return 0; |
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} |
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|
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void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, |
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enum nl80211_band band, bool update) |
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{ |
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struct ieee80211_hw *hw = mvm->hw; |
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struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
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struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; |
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u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0); |
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struct ieee80211_supported_band *sband = hw->wiphy->bands[band]; |
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u16 max_amsdu_len = rs_fw_get_max_amsdu_len(sta); |
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struct iwl_tlc_config_cmd cfg_cmd = { |
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.sta_id = mvmsta->sta_id, |
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.max_ch_width = update ? |
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rs_fw_bw_from_sta_bw(sta) : RATE_MCS_CHAN_WIDTH_20, |
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.flags = cpu_to_le16(rs_fw_get_config_flags(mvm, sta, sband)), |
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.chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)), |
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.sgi_ch_width_supp = rs_fw_sgi_cw_support(sta), |
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.max_mpdu_len = cpu_to_le16(max_amsdu_len), |
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.amsdu = iwl_mvm_is_csum_supported(mvm), |
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}; |
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int ret; |
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u16 cmd_size = sizeof(cfg_cmd); |
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|
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/* In old versions of the API the struct is 4 bytes smaller */ |
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if (iwl_fw_lookup_cmd_ver(mvm->fw, DATA_PATH_GROUP, |
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TLC_MNG_CONFIG_CMD, 0) < 3) |
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cmd_size -= 4; |
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|
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memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); |
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|
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#ifdef CONFIG_IWLWIFI_DEBUGFS |
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iwl_mvm_reset_frame_stats(mvm); |
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#endif |
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rs_fw_set_supp_rates(sta, sband, &cfg_cmd); |
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|
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/* |
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* since TLC offload works with one mode we can assume |
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* that only vht/ht is used and also set it as station max amsdu |
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*/ |
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sta->max_amsdu_len = max_amsdu_len; |
|
|
|
ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, CMD_ASYNC, cmd_size, |
|
&cfg_cmd); |
|
if (ret) |
|
IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret); |
|
} |
|
|
|
int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, |
|
bool enable) |
|
{ |
|
/* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */ |
|
IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n"); |
|
return 0; |
|
} |
|
|
|
void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta) |
|
{ |
|
struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; |
|
|
|
IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); |
|
|
|
lq_sta->pers.drv = mvm; |
|
lq_sta->pers.sta_id = mvmsta->sta_id; |
|
lq_sta->pers.chains = 0; |
|
memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); |
|
lq_sta->pers.last_rssi = S8_MIN; |
|
lq_sta->last_rate_n_flags = 0; |
|
|
|
#ifdef CONFIG_MAC80211_DEBUGFS |
|
lq_sta->pers.dbg_fixed_rate = 0; |
|
#endif |
|
}
|
|
|