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