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 struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 102 u8 supp = 0; 103 104 if (he_cap && he_cap->has_he) 105 return 0; 106 107 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20) 108 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_20MHZ); 109 if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40) 110 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_40MHZ); 111 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80) 112 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_80MHZ); 113 if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160) 114 supp |= BIT(IWL_TLC_MNG_CH_WIDTH_160MHZ); 115 116 return supp; 117 } 118 119 static u16 rs_fw_set_config_flags(struct iwl_mvm *mvm, 120 struct ieee80211_sta *sta) 121 { 122 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 123 struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 124 struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 125 bool vht_ena = vht_cap && vht_cap->vht_supported; 126 u16 flags = 0; 127 128 if (mvm->cfg->ht_params->stbc && 129 (num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1)) { 130 if (he_cap && he_cap->has_he) { 131 if (he_cap->he_cap_elem.phy_cap_info[2] & 132 IEEE80211_HE_PHY_CAP2_STBC_RX_UNDER_80MHZ) 133 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 134 135 if (he_cap->he_cap_elem.phy_cap_info[7] & 136 IEEE80211_HE_PHY_CAP7_STBC_RX_ABOVE_80MHZ) 137 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_STBC_160MHZ_MSK; 138 } else if ((ht_cap && 139 (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)) || 140 (vht_ena && 141 (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))) 142 flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK; 143 } 144 145 if (mvm->cfg->ht_params->ldpc && 146 ((ht_cap && (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING)) || 147 (vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC)))) 148 flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK; 149 150 if (he_cap && he_cap->has_he && 151 (he_cap->he_cap_elem.phy_cap_info[3] & 152 IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_MASK)) 153 flags |= IWL_TLC_MNG_CFG_FLAGS_HE_DCM_NSS_1_MSK; 154 155 return flags; 156 } 157 158 static 159 int rs_fw_vht_highest_rx_mcs_index(const struct ieee80211_sta_vht_cap *vht_cap, 160 int nss) 161 { 162 u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) & 163 (0x3 << (2 * (nss - 1))); 164 rx_mcs >>= (2 * (nss - 1)); 165 166 switch (rx_mcs) { 167 case IEEE80211_VHT_MCS_SUPPORT_0_7: 168 return IWL_TLC_MNG_HT_RATE_MCS7; 169 case IEEE80211_VHT_MCS_SUPPORT_0_8: 170 return IWL_TLC_MNG_HT_RATE_MCS8; 171 case IEEE80211_VHT_MCS_SUPPORT_0_9: 172 return IWL_TLC_MNG_HT_RATE_MCS9; 173 default: 174 WARN_ON_ONCE(1); 175 break; 176 } 177 178 return 0; 179 } 180 181 static void 182 rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta, 183 const struct ieee80211_sta_vht_cap *vht_cap, 184 struct iwl_tlc_config_cmd *cmd) 185 { 186 u16 supp; 187 int i, highest_mcs; 188 189 for (i = 0; i < sta->rx_nss; i++) { 190 if (i == MAX_NSS) 191 break; 192 193 highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1); 194 if (!highest_mcs) 195 continue; 196 197 supp = BIT(highest_mcs + 1) - 1; 198 if (sta->bandwidth == IEEE80211_STA_RX_BW_20) 199 supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9); 200 201 cmd->ht_rates[i][0] = cpu_to_le16(supp); 202 if (sta->bandwidth == IEEE80211_STA_RX_BW_160) 203 cmd->ht_rates[i][1] = cmd->ht_rates[i][0]; 204 } 205 } 206 207 static u16 rs_fw_he_ieee80211_mcs_to_rs_mcs(u16 mcs) 208 { 209 switch (mcs) { 210 case IEEE80211_HE_MCS_SUPPORT_0_7: 211 return BIT(IWL_TLC_MNG_HT_RATE_MCS7 + 1) - 1; 212 case IEEE80211_HE_MCS_SUPPORT_0_9: 213 return BIT(IWL_TLC_MNG_HT_RATE_MCS9 + 1) - 1; 214 case IEEE80211_HE_MCS_SUPPORT_0_11: 215 return BIT(IWL_TLC_MNG_HT_RATE_MCS11 + 1) - 1; 216 case IEEE80211_HE_MCS_NOT_SUPPORTED: 217 return 0; 218 } 219 220 WARN(1, "invalid HE MCS %d\n", mcs); 221 return 0; 222 } 223 224 static void 225 rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta, 226 const struct ieee80211_sta_he_cap *he_cap, 227 struct iwl_tlc_config_cmd *cmd) 228 { 229 u16 mcs_160 = le16_to_cpu(sta->he_cap.he_mcs_nss_supp.rx_mcs_160); 230 u16 mcs_80 = le16_to_cpu(sta->he_cap.he_mcs_nss_supp.rx_mcs_80); 231 int i; 232 233 for (i = 0; i < sta->rx_nss && i < MAX_NSS; i++) { 234 u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3; 235 u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3; 236 237 cmd->ht_rates[i][0] = 238 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_80)); 239 cmd->ht_rates[i][1] = 240 cpu_to_le16(rs_fw_he_ieee80211_mcs_to_rs_mcs(_mcs_160)); 241 } 242 } 243 244 static void rs_fw_set_supp_rates(struct ieee80211_sta *sta, 245 struct ieee80211_supported_band *sband, 246 struct iwl_tlc_config_cmd *cmd) 247 { 248 int i; 249 unsigned long tmp; 250 unsigned long supp; /* must be unsigned long for for_each_set_bit */ 251 const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; 252 const struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap; 253 const struct ieee80211_sta_he_cap *he_cap = &sta->he_cap; 254 255 /* non HT rates */ 256 supp = 0; 257 tmp = sta->supp_rates[sband->band]; 258 for_each_set_bit(i, &tmp, BITS_PER_LONG) 259 supp |= BIT(sband->bitrates[i].hw_value); 260 261 cmd->non_ht_rates = cpu_to_le16(supp); 262 cmd->mode = IWL_TLC_MNG_MODE_NON_HT; 263 264 /* HT/VHT rates */ 265 if (he_cap && he_cap->has_he) { 266 cmd->mode = IWL_TLC_MNG_MODE_HE; 267 rs_fw_he_set_enabled_rates(sta, he_cap, cmd); 268 } else if (vht_cap && vht_cap->vht_supported) { 269 cmd->mode = IWL_TLC_MNG_MODE_VHT; 270 rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd); 271 } else if (ht_cap && ht_cap->ht_supported) { 272 cmd->mode = IWL_TLC_MNG_MODE_HT; 273 cmd->ht_rates[0][0] = cpu_to_le16(ht_cap->mcs.rx_mask[0]); 274 cmd->ht_rates[1][0] = cpu_to_le16(ht_cap->mcs.rx_mask[1]); 275 } 276 } 277 278 void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, 279 struct iwl_rx_cmd_buffer *rxb) 280 { 281 struct iwl_rx_packet *pkt = rxb_addr(rxb); 282 struct iwl_tlc_update_notif *notif; 283 struct ieee80211_sta *sta; 284 struct iwl_mvm_sta *mvmsta; 285 struct iwl_lq_sta_rs_fw *lq_sta; 286 u32 flags; 287 288 rcu_read_lock(); 289 290 notif = (void *)pkt->data; 291 sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]); 292 if (IS_ERR_OR_NULL(sta)) { 293 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 294 notif->sta_id); 295 goto out; 296 } 297 298 mvmsta = iwl_mvm_sta_from_mac80211(sta); 299 300 if (!mvmsta) { 301 IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n", 302 notif->sta_id); 303 goto out; 304 } 305 306 flags = le32_to_cpu(notif->flags); 307 308 lq_sta = &mvmsta->lq_sta.rs_fw; 309 310 if (flags & IWL_TLC_NOTIF_FLAG_RATE) { 311 lq_sta->last_rate_n_flags = le32_to_cpu(notif->rate); 312 IWL_DEBUG_RATE(mvm, "new rate_n_flags: 0x%X\n", 313 lq_sta->last_rate_n_flags); 314 } 315 316 if (flags & IWL_TLC_NOTIF_FLAG_AMSDU) { 317 u16 size = le32_to_cpu(notif->amsdu_size); 318 int i; 319 320 if (WARN_ON(sta->max_amsdu_len < size)) 321 goto out; 322 323 mvmsta->amsdu_enabled = le32_to_cpu(notif->amsdu_enabled); 324 mvmsta->max_amsdu_len = size; 325 sta->max_rc_amsdu_len = mvmsta->max_amsdu_len; 326 327 for (i = 0; i < IWL_MAX_TID_COUNT; i++) { 328 if (mvmsta->amsdu_enabled & BIT(i)) 329 sta->max_tid_amsdu_len[i] = 330 iwl_mvm_max_amsdu_size(mvm, sta, i); 331 else 332 /* 333 * Not so elegant, but this will effectively 334 * prevent AMSDU on this TID 335 */ 336 sta->max_tid_amsdu_len[i] = 1; 337 } 338 339 IWL_DEBUG_RATE(mvm, 340 "AMSDU update. AMSDU size: %d, AMSDU selected size: %d, AMSDU TID bitmap 0x%X\n", 341 le32_to_cpu(notif->amsdu_size), size, 342 mvmsta->amsdu_enabled); 343 } 344 out: 345 rcu_read_unlock(); 346 } 347 348 void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta, 349 enum nl80211_band band, bool update) 350 { 351 struct ieee80211_hw *hw = mvm->hw; 352 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 353 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 354 u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0); 355 struct ieee80211_supported_band *sband; 356 struct iwl_tlc_config_cmd cfg_cmd = { 357 .sta_id = mvmsta->sta_id, 358 .max_ch_width = update ? 359 rs_fw_bw_from_sta_bw(sta) : RATE_MCS_CHAN_WIDTH_20, 360 .flags = cpu_to_le16(rs_fw_set_config_flags(mvm, sta)), 361 .chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)), 362 .max_mpdu_len = cpu_to_le16(sta->max_amsdu_len), 363 .sgi_ch_width_supp = rs_fw_sgi_cw_support(sta), 364 .amsdu = iwl_mvm_is_csum_supported(mvm), 365 }; 366 int ret; 367 368 memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers)); 369 370 #ifdef CONFIG_IWLWIFI_DEBUGFS 371 iwl_mvm_reset_frame_stats(mvm); 372 #endif 373 sband = hw->wiphy->bands[band]; 374 rs_fw_set_supp_rates(sta, sband, &cfg_cmd); 375 376 ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, sizeof(cfg_cmd), &cfg_cmd); 377 if (ret) 378 IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret); 379 } 380 381 int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, 382 bool enable) 383 { 384 /* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */ 385 IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n"); 386 return 0; 387 } 388 389 void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta) 390 { 391 struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw; 392 393 IWL_DEBUG_RATE(mvm, "create station rate scale window\n"); 394 395 lq_sta->pers.drv = mvm; 396 lq_sta->pers.sta_id = mvmsta->sta_id; 397 lq_sta->pers.chains = 0; 398 memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal)); 399 lq_sta->pers.last_rssi = S8_MIN; 400 lq_sta->last_rate_n_flags = 0; 401 402 #ifdef CONFIG_MAC80211_DEBUGFS 403 lq_sta->pers.dbg_fixed_rate = 0; 404 #endif 405 } 406