1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2015-2017 Intel Deutschland GmbH 4 * Copyright (C) 2018-2022 Intel Corporation 5 */ 6 #include <net/cfg80211.h> 7 #include <linux/etherdevice.h> 8 #include "mvm.h" 9 #include "constants.h" 10 11 struct iwl_mvm_pasn_sta { 12 struct list_head list; 13 struct iwl_mvm_int_sta int_sta; 14 u8 addr[ETH_ALEN]; 15 }; 16 17 struct iwl_mvm_pasn_hltk_data { 18 u8 *addr; 19 u8 cipher; 20 u8 *hltk; 21 }; 22 23 static int iwl_mvm_ftm_responder_set_bw_v1(struct cfg80211_chan_def *chandef, 24 u8 *bw, u8 *ctrl_ch_position) 25 { 26 switch (chandef->width) { 27 case NL80211_CHAN_WIDTH_20_NOHT: 28 *bw = IWL_TOF_BW_20_LEGACY; 29 break; 30 case NL80211_CHAN_WIDTH_20: 31 *bw = IWL_TOF_BW_20_HT; 32 break; 33 case NL80211_CHAN_WIDTH_40: 34 *bw = IWL_TOF_BW_40; 35 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef); 36 break; 37 case NL80211_CHAN_WIDTH_80: 38 *bw = IWL_TOF_BW_80; 39 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef); 40 break; 41 default: 42 return -ENOTSUPP; 43 } 44 45 return 0; 46 } 47 48 static int iwl_mvm_ftm_responder_set_bw_v2(struct cfg80211_chan_def *chandef, 49 u8 *format_bw, u8 *ctrl_ch_position, 50 u8 cmd_ver) 51 { 52 switch (chandef->width) { 53 case NL80211_CHAN_WIDTH_20_NOHT: 54 *format_bw = IWL_LOCATION_FRAME_FORMAT_LEGACY; 55 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS; 56 break; 57 case NL80211_CHAN_WIDTH_20: 58 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT; 59 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS; 60 break; 61 case NL80211_CHAN_WIDTH_40: 62 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT; 63 *format_bw |= IWL_LOCATION_BW_40MHZ << LOCATION_BW_POS; 64 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef); 65 break; 66 case NL80211_CHAN_WIDTH_80: 67 *format_bw = IWL_LOCATION_FRAME_FORMAT_VHT; 68 *format_bw |= IWL_LOCATION_BW_80MHZ << LOCATION_BW_POS; 69 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef); 70 break; 71 case NL80211_CHAN_WIDTH_160: 72 if (cmd_ver >= 9) { 73 *format_bw = IWL_LOCATION_FRAME_FORMAT_HE; 74 *format_bw |= IWL_LOCATION_BW_160MHZ << LOCATION_BW_POS; 75 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef); 76 break; 77 } 78 fallthrough; 79 default: 80 return -ENOTSUPP; 81 } 82 83 return 0; 84 } 85 86 static void 87 iwl_mvm_ftm_responder_set_ndp(struct iwl_mvm *mvm, 88 struct iwl_tof_responder_config_cmd_v9 *cmd) 89 { 90 /* Up to 2 R2I STS are allowed on the responder */ 91 u32 r2i_max_sts = IWL_MVM_FTM_R2I_MAX_STS < 2 ? 92 IWL_MVM_FTM_R2I_MAX_STS : 1; 93 94 cmd->r2i_ndp_params = IWL_MVM_FTM_R2I_MAX_REP | 95 (r2i_max_sts << IWL_RESPONDER_STS_POS) | 96 (IWL_MVM_FTM_R2I_MAX_TOTAL_LTF << IWL_RESPONDER_TOTAL_LTF_POS); 97 cmd->i2r_ndp_params = IWL_MVM_FTM_I2R_MAX_REP | 98 (IWL_MVM_FTM_I2R_MAX_STS << IWL_RESPONDER_STS_POS) | 99 (IWL_MVM_FTM_I2R_MAX_TOTAL_LTF << IWL_RESPONDER_TOTAL_LTF_POS); 100 cmd->cmd_valid_fields |= 101 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_NDP_PARAMS); 102 } 103 104 static int 105 iwl_mvm_ftm_responder_cmd(struct iwl_mvm *mvm, 106 struct ieee80211_vif *vif, 107 struct cfg80211_chan_def *chandef) 108 { 109 u32 cmd_id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_CONFIG_CMD); 110 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 111 /* 112 * The command structure is the same for versions 6, 7 and 8 (only the 113 * field interpretation is different), so the same struct can be use 114 * for all cases. 115 */ 116 struct iwl_tof_responder_config_cmd_v9 cmd = { 117 .channel_num = chandef->chan->hw_value, 118 .cmd_valid_fields = 119 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_CHAN_INFO | 120 IWL_TOF_RESPONDER_CMD_VALID_BSSID | 121 IWL_TOF_RESPONDER_CMD_VALID_STA_ID), 122 .sta_id = mvmvif->bcast_sta.sta_id, 123 }; 124 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 6); 125 int err; 126 int cmd_size; 127 128 lockdep_assert_held(&mvm->mutex); 129 130 /* Use a default of bss_color=1 for now */ 131 if (cmd_ver == 9) { 132 cmd.cmd_valid_fields |= 133 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_BSS_COLOR | 134 IWL_TOF_RESPONDER_CMD_VALID_MIN_MAX_TIME_BETWEEN_MSR); 135 cmd.bss_color = 1; 136 cmd.min_time_between_msr = 137 cpu_to_le16(IWL_MVM_FTM_NON_TB_MIN_TIME_BETWEEN_MSR); 138 cmd.max_time_between_msr = 139 cpu_to_le16(IWL_MVM_FTM_NON_TB_MAX_TIME_BETWEEN_MSR); 140 cmd_size = sizeof(struct iwl_tof_responder_config_cmd_v9); 141 } else { 142 /* All versions up to version 8 have the same size */ 143 cmd_size = sizeof(struct iwl_tof_responder_config_cmd_v8); 144 } 145 146 if (cmd_ver >= 8) 147 iwl_mvm_ftm_responder_set_ndp(mvm, &cmd); 148 149 if (cmd_ver >= 7) 150 err = iwl_mvm_ftm_responder_set_bw_v2(chandef, &cmd.format_bw, 151 &cmd.ctrl_ch_position, 152 cmd_ver); 153 else 154 err = iwl_mvm_ftm_responder_set_bw_v1(chandef, &cmd.format_bw, 155 &cmd.ctrl_ch_position); 156 157 if (err) { 158 IWL_ERR(mvm, "Failed to set responder bandwidth\n"); 159 return err; 160 } 161 162 memcpy(cmd.bssid, vif->addr, ETH_ALEN); 163 164 return iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, cmd_size, &cmd); 165 } 166 167 static int 168 iwl_mvm_ftm_responder_dyn_cfg_v2(struct iwl_mvm *mvm, 169 struct ieee80211_vif *vif, 170 struct ieee80211_ftm_responder_params *params) 171 { 172 struct iwl_tof_responder_dyn_config_cmd_v2 cmd = { 173 .lci_len = cpu_to_le32(params->lci_len + 2), 174 .civic_len = cpu_to_le32(params->civicloc_len + 2), 175 }; 176 u8 data[IWL_LCI_CIVIC_IE_MAX_SIZE] = {0}; 177 struct iwl_host_cmd hcmd = { 178 .id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD), 179 .data[0] = &cmd, 180 .len[0] = sizeof(cmd), 181 .data[1] = &data, 182 /* .len[1] set later */ 183 /* may not be able to DMA from stack */ 184 .dataflags[1] = IWL_HCMD_DFL_DUP, 185 }; 186 u32 aligned_lci_len = ALIGN(params->lci_len + 2, 4); 187 u32 aligned_civicloc_len = ALIGN(params->civicloc_len + 2, 4); 188 u8 *pos = data; 189 190 lockdep_assert_held(&mvm->mutex); 191 192 if (aligned_lci_len + aligned_civicloc_len > sizeof(data)) { 193 IWL_ERR(mvm, "LCI/civicloc data too big (%zd + %zd)\n", 194 params->lci_len, params->civicloc_len); 195 return -ENOBUFS; 196 } 197 198 pos[0] = WLAN_EID_MEASURE_REPORT; 199 pos[1] = params->lci_len; 200 memcpy(pos + 2, params->lci, params->lci_len); 201 202 pos += aligned_lci_len; 203 pos[0] = WLAN_EID_MEASURE_REPORT; 204 pos[1] = params->civicloc_len; 205 memcpy(pos + 2, params->civicloc, params->civicloc_len); 206 207 hcmd.len[1] = aligned_lci_len + aligned_civicloc_len; 208 209 return iwl_mvm_send_cmd(mvm, &hcmd); 210 } 211 212 static int 213 iwl_mvm_ftm_responder_dyn_cfg_v3(struct iwl_mvm *mvm, 214 struct ieee80211_vif *vif, 215 struct ieee80211_ftm_responder_params *params, 216 struct iwl_mvm_pasn_hltk_data *hltk_data) 217 { 218 struct iwl_tof_responder_dyn_config_cmd cmd; 219 struct iwl_host_cmd hcmd = { 220 .id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD), 221 .data[0] = &cmd, 222 .len[0] = sizeof(cmd), 223 /* may not be able to DMA from stack */ 224 .dataflags[0] = IWL_HCMD_DFL_DUP, 225 }; 226 227 lockdep_assert_held(&mvm->mutex); 228 229 cmd.valid_flags = 0; 230 231 if (params) { 232 if (params->lci_len + 2 > sizeof(cmd.lci_buf) || 233 params->civicloc_len + 2 > sizeof(cmd.civic_buf)) { 234 IWL_ERR(mvm, 235 "LCI/civic data too big (lci=%zd, civic=%zd)\n", 236 params->lci_len, params->civicloc_len); 237 return -ENOBUFS; 238 } 239 240 cmd.lci_buf[0] = WLAN_EID_MEASURE_REPORT; 241 cmd.lci_buf[1] = params->lci_len; 242 memcpy(cmd.lci_buf + 2, params->lci, params->lci_len); 243 cmd.lci_len = params->lci_len + 2; 244 245 cmd.civic_buf[0] = WLAN_EID_MEASURE_REPORT; 246 cmd.civic_buf[1] = params->civicloc_len; 247 memcpy(cmd.civic_buf + 2, params->civicloc, 248 params->civicloc_len); 249 cmd.civic_len = params->civicloc_len + 2; 250 251 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_LCI | 252 IWL_RESPONDER_DYN_CFG_VALID_CIVIC; 253 } 254 255 if (hltk_data) { 256 if (hltk_data->cipher > IWL_LOCATION_CIPHER_GCMP_256) { 257 IWL_ERR(mvm, "invalid cipher: %u\n", 258 hltk_data->cipher); 259 return -EINVAL; 260 } 261 262 cmd.cipher = hltk_data->cipher; 263 memcpy(cmd.addr, hltk_data->addr, sizeof(cmd.addr)); 264 memcpy(cmd.hltk_buf, hltk_data->hltk, sizeof(cmd.hltk_buf)); 265 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_PASN_STA; 266 } 267 268 return iwl_mvm_send_cmd(mvm, &hcmd); 269 } 270 271 static int 272 iwl_mvm_ftm_responder_dyn_cfg_cmd(struct iwl_mvm *mvm, 273 struct ieee80211_vif *vif, 274 struct ieee80211_ftm_responder_params *params) 275 { 276 int ret; 277 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, 278 WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD), 279 2); 280 281 switch (cmd_ver) { 282 case 2: 283 ret = iwl_mvm_ftm_responder_dyn_cfg_v2(mvm, vif, 284 params); 285 break; 286 case 3: 287 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif, 288 params, NULL); 289 break; 290 default: 291 IWL_ERR(mvm, "Unsupported DYN_CONFIG_CMD version %u\n", 292 cmd_ver); 293 ret = -ENOTSUPP; 294 } 295 296 return ret; 297 } 298 299 static void iwl_mvm_resp_del_pasn_sta(struct iwl_mvm *mvm, 300 struct ieee80211_vif *vif, 301 struct iwl_mvm_pasn_sta *sta) 302 { 303 list_del(&sta->list); 304 iwl_mvm_rm_sta_id(mvm, vif, sta->int_sta.sta_id); 305 iwl_mvm_dealloc_int_sta(mvm, &sta->int_sta); 306 kfree(sta); 307 } 308 309 int iwl_mvm_ftm_respoder_add_pasn_sta(struct iwl_mvm *mvm, 310 struct ieee80211_vif *vif, 311 u8 *addr, u32 cipher, u8 *tk, u32 tk_len, 312 u8 *hltk, u32 hltk_len) 313 { 314 int ret; 315 struct iwl_mvm_pasn_sta *sta = NULL; 316 struct iwl_mvm_pasn_hltk_data hltk_data = { 317 .addr = addr, 318 .hltk = hltk, 319 }; 320 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, 321 WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD), 322 2); 323 324 lockdep_assert_held(&mvm->mutex); 325 326 if (cmd_ver < 3) { 327 IWL_ERR(mvm, "Adding PASN station not supported by FW\n"); 328 return -ENOTSUPP; 329 } 330 331 hltk_data.cipher = iwl_mvm_cipher_to_location_cipher(cipher); 332 if (hltk_data.cipher == IWL_LOCATION_CIPHER_INVALID) { 333 IWL_ERR(mvm, "invalid cipher: %u\n", cipher); 334 return -EINVAL; 335 } 336 337 if (tk && tk_len) { 338 sta = kzalloc(sizeof(*sta), GFP_KERNEL); 339 if (!sta) 340 return -ENOBUFS; 341 342 ret = iwl_mvm_add_pasn_sta(mvm, vif, &sta->int_sta, addr, 343 cipher, tk, tk_len); 344 if (ret) { 345 kfree(sta); 346 return ret; 347 } 348 349 memcpy(sta->addr, addr, ETH_ALEN); 350 list_add_tail(&sta->list, &mvm->resp_pasn_list); 351 } 352 353 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif, NULL, &hltk_data); 354 if (ret && sta) 355 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta); 356 357 return ret; 358 } 359 360 int iwl_mvm_ftm_resp_remove_pasn_sta(struct iwl_mvm *mvm, 361 struct ieee80211_vif *vif, u8 *addr) 362 { 363 struct iwl_mvm_pasn_sta *sta, *prev; 364 365 lockdep_assert_held(&mvm->mutex); 366 367 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list) { 368 if (!memcmp(sta->addr, addr, ETH_ALEN)) { 369 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta); 370 return 0; 371 } 372 } 373 374 IWL_ERR(mvm, "FTM: PASN station %pM not found\n", addr); 375 return -EINVAL; 376 } 377 378 int iwl_mvm_ftm_start_responder(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 379 { 380 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 381 struct ieee80211_ftm_responder_params *params; 382 struct ieee80211_chanctx_conf ctx, *pctx; 383 u16 *phy_ctxt_id; 384 struct iwl_mvm_phy_ctxt *phy_ctxt; 385 int ret; 386 387 params = vif->bss_conf.ftmr_params; 388 389 lockdep_assert_held(&mvm->mutex); 390 391 if (WARN_ON_ONCE(!vif->bss_conf.ftm_responder)) 392 return -EINVAL; 393 394 if (vif->p2p || vif->type != NL80211_IFTYPE_AP || 395 !mvmvif->ap_ibss_active) { 396 IWL_ERR(mvm, "Cannot start responder, not in AP mode\n"); 397 return -EIO; 398 } 399 400 rcu_read_lock(); 401 pctx = rcu_dereference(vif->bss_conf.chanctx_conf); 402 /* Copy the ctx to unlock the rcu and send the phy ctxt. We don't care 403 * about changes in the ctx after releasing the lock because the driver 404 * is still protected by the mutex. */ 405 ctx = *pctx; 406 phy_ctxt_id = (u16 *)pctx->drv_priv; 407 rcu_read_unlock(); 408 409 phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id]; 410 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx.def, 411 ctx.rx_chains_static, 412 ctx.rx_chains_dynamic); 413 if (ret) 414 return ret; 415 416 ret = iwl_mvm_ftm_responder_cmd(mvm, vif, &ctx.def); 417 if (ret) 418 return ret; 419 420 if (params) 421 ret = iwl_mvm_ftm_responder_dyn_cfg_cmd(mvm, vif, params); 422 423 return ret; 424 } 425 426 void iwl_mvm_ftm_responder_clear(struct iwl_mvm *mvm, 427 struct ieee80211_vif *vif) 428 { 429 struct iwl_mvm_pasn_sta *sta, *prev; 430 431 lockdep_assert_held(&mvm->mutex); 432 433 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list) 434 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta); 435 } 436 437 void iwl_mvm_ftm_restart_responder(struct iwl_mvm *mvm, 438 struct ieee80211_vif *vif) 439 { 440 if (!vif->bss_conf.ftm_responder) 441 return; 442 443 iwl_mvm_ftm_responder_clear(mvm, vif); 444 iwl_mvm_ftm_start_responder(mvm, vif); 445 } 446 447 void iwl_mvm_ftm_responder_stats(struct iwl_mvm *mvm, 448 struct iwl_rx_cmd_buffer *rxb) 449 { 450 struct iwl_rx_packet *pkt = rxb_addr(rxb); 451 struct iwl_ftm_responder_stats *resp = (void *)pkt->data; 452 struct cfg80211_ftm_responder_stats *stats = &mvm->ftm_resp_stats; 453 u32 flags = le32_to_cpu(resp->flags); 454 455 if (resp->success_ftm == resp->ftm_per_burst) 456 stats->success_num++; 457 else if (resp->success_ftm >= 2) 458 stats->partial_num++; 459 else 460 stats->failed_num++; 461 462 if ((flags & FTM_RESP_STAT_ASAP_REQ) && 463 (flags & FTM_RESP_STAT_ASAP_RESP)) 464 stats->asap_num++; 465 466 if (flags & FTM_RESP_STAT_NON_ASAP_RESP) 467 stats->non_asap_num++; 468 469 stats->total_duration_ms += le32_to_cpu(resp->duration) / USEC_PER_MSEC; 470 471 if (flags & FTM_RESP_STAT_TRIGGER_UNKNOWN) 472 stats->unknown_triggers_num++; 473 474 if (flags & FTM_RESP_STAT_DUP) 475 stats->reschedule_requests_num++; 476 477 if (flags & FTM_RESP_STAT_NON_ASAP_OUT_WIN) 478 stats->out_of_window_triggers_num++; 479 } 480