1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2017 Intel Deutschland GmbH 9 * Copyright(c) 2018 Intel Corporation 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * The full GNU General Public License is included in this distribution 21 * in the file called COPYING. 22 * 23 * Contact Information: 24 * Intel Linux Wireless <linuxwifi@intel.com> 25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 26 * 27 * BSD LICENSE 28 * 29 * Copyright(c) 2017 Intel Deutschland GmbH 30 * Copyright(c) 2018 Intel Corporation 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 37 * * Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * * Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in 41 * the documentation and/or other materials provided with the 42 * distribution. 43 * * Neither the name Intel Corporation nor the names of its 44 * contributors may be used to endorse or promote products derived 45 * from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 48 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 49 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 50 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 51 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 53 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 54 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 55 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 56 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 58 * 59 *****************************************************************************/ 60 #include "rs.h" 61 #include "fw-api.h" 62 #include "sta.h" 63 #include "iwl-op-mode.h" 64 #include "mvm.h" 65 66 static u8 rs_fw_bw_from_sta_bw(struct ieee80211_sta *sta) 67 { 68 switch (sta->bandwidth) { 69 case IEEE80211_STA_RX_BW_160: 70 return IWL_TLC_MNG_CH_WIDTH_160MHZ; 71 case IEEE80211_STA_RX_BW_80: 72 return IWL_TLC_MNG_CH_WIDTH_80MHZ; 73 case IEEE80211_STA_RX_BW_40: 74 return IWL_TLC_MNG_CH_WIDTH_40MHZ; 75 case IEEE80211_STA_RX_BW_20: 76 default: 77 return IWL_TLC_MNG_CH_WIDTH_20MHZ; 78 } 79 } 80 81 static u8 rs_fw_set_active_chains(u8 chains) 82 { 83 u8 fw_chains = 0; 84 85 if (chains & ANT_A) 86 fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK; 87 if (chains & ANT_B) 88 fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK; 89 if (chains & ANT_C) 90 WARN(false, 91 "tlc offload doesn't support antenna C. chains: 0x%x\n", 92 chains); 93 94 return fw_chains; 95 } 96 97 static u8 rs_fw_sgi_cw_support(struct ieee80211_sta *sta) 98 { 99 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 100 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 101 u8 supp = 0; 102 103 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20) 104 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ); 105 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40) 106 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ); 107 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80) 108 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ); 109 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160) 110 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ); 111 112 return supp; 113 } 114 115 static u16 rs_fw_set_config_flags(struct iwl_mvm *mvm, 116 struct ieee80211_sta *sta) 117 { 118 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 119 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 120 bool vht_ena = vht_cap && vht_cap->vht_supported; 121 u16 flags = 0; 122 123 if (mvm->cfg->ht_params->stbc && 124 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) && 125 ((ht_cap && (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)) || 126 (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK)))) 127 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 128 129 if (mvm->cfg->ht_params->ldpc && 130 ((ht_cap && (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING)) || 131 (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)))) 132 flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; 133 134 return flags; 135 } 136 137 static 138 int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap, 139 int nss) 140 { 141 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & 142 (0x3 << (2 * (nss - 1))); 143 rx_mcs >>= (2 * (nss - 1)); 144 145 switch (rx_mcs) { 146 case IEEE80211_VHT_MCS_SUPPORT_0_7: 147 return IWL_TLC_MNG_HT_RATE_MCS7; 148 case IEEE80211_VHT_MCS_SUPPORT_0_8: 149 return IWL_TLC_MNG_HT_RATE_MCS8; 150 case IEEE80211_VHT_MCS_SUPPORT_0_9: 151 return IWL_TLC_MNG_HT_RATE_MCS9; 152 default: 153 WARN_ON_ONCE(1); 154 break; 155 } 156 157 return 0; 158 } 159 160 static void 161 rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta, 162 const struct ieee80211_sta_vht_cap *vht_cap, 163 struct iwl_tlc_config_cmd *cmd) 164 { 165 u16 supp; 166 int i, highest_mcs; 167 168 for (i = 0; i < sta->rx_nss; i++) { 169 if (i == MAX_NSS) 170 break; 171 172 highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1); 173 if (!highest_mcs) 174 continue; 175 176 supp = BIT(highest_mcs + 1) - 1; 177 if (sta->bandwidth == IEEE80211_STA_RX_BW_20) 178 supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9); 179 180 cmd->ht_rates[i][0] = cpu_to_le16(supp); 181 if (sta->bandwidth == IEEE80211_STA_RX_BW_160) 182 cmd->ht_rates[i][1] = cmd->ht_rates[i][0]; 183 } 184 } 185 186 static void rs_fw_set_supp_rates(struct ieee80211_sta *sta, 187 struct ieee80211_supported_band *sband, 188 struct iwl_tlc_config_cmd *cmd) 189 { 190 int i; 191 unsigned long tmp; 192 unsigned long supp; /* must be unsigned long for for_each_set_bit */ 193 const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 194 const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 195 196 /* non HT rates */ 197 supp = 0; 198 tmp = sta->supp_rates[sband->band]; 199 for_each_set_bit(i, &tmp, BITS_PER_LONG) 200 supp |= BIT(sband->bitrates[i].hw_value); 201 202 cmd->non_ht_rates = cpu_to_le16(supp); 203 cmd->mode = IWL_TLC_MNG_MODE_NON_HT; 204 205 if (vht_cap && vht_cap->vht_supported) { 206 cmd->mode = IWL_TLC_MNG_MODE_VHT; 207 rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd); 208 } else if (ht_cap && ht_cap->ht_supported) { 209 cmd->mode = IWL_TLC_MNG_MODE_HT; 210 cmd->ht_rates[0][0] = cpu_to_le16(ht_cap->mcs.rx_mask[0]); 211 cmd->ht_rates[1][0] = cpu_to_le16(ht_cap->mcs.rx_mask[1]); 212 } 213 } 214 215 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, 216 struct iwl_rx_cmd_buffer *rxb) 217 { 218 struct iwl_rx_packet *pkt = rxb_addr(rxb); 219 struct iwl_tlc_update_notif *notif; 220 struct ieee80211_sta *sta; 221 struct iwl_mvm_sta *mvmsta; 222 struct iwl_lq_sta_rs_fw *lq_sta; 223 u32 flags; 224 225 rcu_read_lock(); 226 227 notif = (void *)pkt->data; 228 sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]); 229 if (IS_ERR_OR_NULL(sta)) { 230 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 231 notif->sta_id); 232 goto out; 233 } 234 235 mvmsta = iwl_mvm_sta_from_mac80211(sta); 236 237 if (!mvmsta) { 238 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 239 notif->sta_id); 240 goto out; 241 } 242 243 flags = le32_to_cpu(notif->flags); 244 245 lq_sta = &mvmsta->lq_sta.rs_fw; 246 247 if (flags & IWL_TLC_NOTIF_FLAG_RATE) { 248 lq_sta->last_rate_n_flags = le32_to_cpu(notif->rate); 249 IWL_DEBUG_RATE(mvm, "new rate_n_flags: 0x%X\n", 250 lq_sta->last_rate_n_flags); 251 } 252 253 if (flags & IWL_TLC_NOTIF_FLAG_AMSDU) { 254 u16 size = le32_to_cpu(notif->amsdu_size); 255 256 if (WARN_ON(sta->max_amsdu_len < size)) 257 goto out; 258 259 mvmsta->amsdu_enabled = le32_to_cpu(notif->amsdu_enabled); 260 mvmsta->max_amsdu_len = size; 261 262 IWL_DEBUG_RATE(mvm, 263 "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n", 264 le32_to_cpu(notif->amsdu_size), size, 265 mvmsta->amsdu_enabled); 266 } 267 out: 268 rcu_read_unlock(); 269 } 270 271 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 272 enum nl80211_band band) 273 { 274 struct ieee80211_hw *hw = mvm->hw; 275 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 276 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 277 u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0); 278 struct ieee80211_supported_band *sband; 279 struct iwl_tlc_config_cmd cfg_cmd = { 280 .sta_id = mvmsta->sta_id, 281 .max_ch_width = rs_fw_bw_from_sta_bw(sta), 282 .flags = cpu_to_le16(rs_fw_set_config_flags(mvm, sta)), 283 .chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)), 284 .max_mpdu_len = cpu_to_le16(sta->max_amsdu_len), 285 .sgi_ch_width_supp = rs_fw_sgi_cw_support(sta), 286 .amsdu = iwl_mvm_is_csum_supported(mvm), 287 }; 288 int ret; 289 290 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); 291 292 #ifdef CONFIG_IWLWIFI_DEBUGFS 293 iwl_mvm_reset_frame_stats(mvm); 294 #endif 295 sband = hw->wiphy->bands[band]; 296 rs_fw_set_supp_rates(sta, sband, &cfg_cmd); 297 298 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, sizeof(cfg_cmd), &cfg_cmd); 299 if (ret) 300 IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret); 301 } 302 303 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 304 bool enable) 305 { 306 /* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */ 307 IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n"); 308 return 0; 309 } 310 311 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta) 312 { 313 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 314 315 IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); 316 317 lq_sta->pers.drv = mvm; 318 lq_sta->pers.sta_id = mvmsta->sta_id; 319 lq_sta->pers.chains = 0; 320 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); 321 lq_sta->pers.last_rssi = S8_MIN; 322 lq_sta->last_rate_n_flags = 0; 323 324 #ifdef CONFIG_MAC80211_DEBUGFS 325 lq_sta->pers.dbg_fixed_rate = 0; 326 #endif 327 } 328