1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2015-2017 Intel Deutschland GmbH 4 * Copyright (C) 2018-2021 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 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 110 /* 111 * The command structure is the same for versions 6, 7 and 8 (only the 112 * field interpretation is different), so the same struct can be use 113 * for all cases. 114 */ 115 struct iwl_tof_responder_config_cmd_v9 cmd = { 116 .channel_num = chandef->chan->hw_value, 117 .cmd_valid_fields = 118 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_CHAN_INFO | 119 IWL_TOF_RESPONDER_CMD_VALID_BSSID | 120 IWL_TOF_RESPONDER_CMD_VALID_STA_ID), 121 .sta_id = mvmvif->bcast_sta.sta_id, 122 }; 123 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP, 124 TOF_RESPONDER_CONFIG_CMD, 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, iwl_cmd_id(TOF_RESPONDER_CONFIG_CMD, 165 LOCATION_GROUP, 0), 166 0, cmd_size, &cmd); 167 } 168 169 static int 170 iwl_mvm_ftm_responder_dyn_cfg_v2(struct iwl_mvm *mvm, 171 struct ieee80211_vif *vif, 172 struct ieee80211_ftm_responder_params *params) 173 { 174 struct iwl_tof_responder_dyn_config_cmd_v2 cmd = { 175 .lci_len = cpu_to_le32(params->lci_len + 2), 176 .civic_len = cpu_to_le32(params->civicloc_len + 2), 177 }; 178 u8 data[IWL_LCI_CIVIC_IE_MAX_SIZE] = {0}; 179 struct iwl_host_cmd hcmd = { 180 .id = iwl_cmd_id(TOF_RESPONDER_DYN_CONFIG_CMD, 181 LOCATION_GROUP, 0), 182 .data[0] = &cmd, 183 .len[0] = sizeof(cmd), 184 .data[1] = &data, 185 /* .len[1] set later */ 186 /* may not be able to DMA from stack */ 187 .dataflags[1] = IWL_HCMD_DFL_DUP, 188 }; 189 u32 aligned_lci_len = ALIGN(params->lci_len + 2, 4); 190 u32 aligned_civicloc_len = ALIGN(params->civicloc_len + 2, 4); 191 u8 *pos = data; 192 193 lockdep_assert_held(&mvm->mutex); 194 195 if (aligned_lci_len + aligned_civicloc_len > sizeof(data)) { 196 IWL_ERR(mvm, "LCI/civicloc data too big (%zd + %zd)\n", 197 params->lci_len, params->civicloc_len); 198 return -ENOBUFS; 199 } 200 201 pos[0] = WLAN_EID_MEASURE_REPORT; 202 pos[1] = params->lci_len; 203 memcpy(pos + 2, params->lci, params->lci_len); 204 205 pos += aligned_lci_len; 206 pos[0] = WLAN_EID_MEASURE_REPORT; 207 pos[1] = params->civicloc_len; 208 memcpy(pos + 2, params->civicloc, params->civicloc_len); 209 210 hcmd.len[1] = aligned_lci_len + aligned_civicloc_len; 211 212 return iwl_mvm_send_cmd(mvm, &hcmd); 213 } 214 215 static int 216 iwl_mvm_ftm_responder_dyn_cfg_v3(struct iwl_mvm *mvm, 217 struct ieee80211_vif *vif, 218 struct ieee80211_ftm_responder_params *params, 219 struct iwl_mvm_pasn_hltk_data *hltk_data) 220 { 221 struct iwl_tof_responder_dyn_config_cmd cmd; 222 struct iwl_host_cmd hcmd = { 223 .id = iwl_cmd_id(TOF_RESPONDER_DYN_CONFIG_CMD, 224 LOCATION_GROUP, 0), 225 .data[0] = &cmd, 226 .len[0] = sizeof(cmd), 227 /* may not be able to DMA from stack */ 228 .dataflags[0] = IWL_HCMD_DFL_DUP, 229 }; 230 231 lockdep_assert_held(&mvm->mutex); 232 233 cmd.valid_flags = 0; 234 235 if (params) { 236 if (params->lci_len + 2 > sizeof(cmd.lci_buf) || 237 params->civicloc_len + 2 > sizeof(cmd.civic_buf)) { 238 IWL_ERR(mvm, 239 "LCI/civic data too big (lci=%zd, civic=%zd)\n", 240 params->lci_len, params->civicloc_len); 241 return -ENOBUFS; 242 } 243 244 cmd.lci_buf[0] = WLAN_EID_MEASURE_REPORT; 245 cmd.lci_buf[1] = params->lci_len; 246 memcpy(cmd.lci_buf + 2, params->lci, params->lci_len); 247 cmd.lci_len = params->lci_len + 2; 248 249 cmd.civic_buf[0] = WLAN_EID_MEASURE_REPORT; 250 cmd.civic_buf[1] = params->civicloc_len; 251 memcpy(cmd.civic_buf + 2, params->civicloc, 252 params->civicloc_len); 253 cmd.civic_len = params->civicloc_len + 2; 254 255 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_LCI | 256 IWL_RESPONDER_DYN_CFG_VALID_CIVIC; 257 } 258 259 if (hltk_data) { 260 if (hltk_data->cipher > IWL_LOCATION_CIPHER_GCMP_256) { 261 IWL_ERR(mvm, "invalid cipher: %u\n", 262 hltk_data->cipher); 263 return -EINVAL; 264 } 265 266 cmd.cipher = hltk_data->cipher; 267 memcpy(cmd.addr, hltk_data->addr, sizeof(cmd.addr)); 268 memcpy(cmd.hltk_buf, hltk_data->hltk, sizeof(cmd.hltk_buf)); 269 cmd.valid_flags |= IWL_RESPONDER_DYN_CFG_VALID_PASN_STA; 270 } 271 272 return iwl_mvm_send_cmd(mvm, &hcmd); 273 } 274 275 static int 276 iwl_mvm_ftm_responder_dyn_cfg_cmd(struct iwl_mvm *mvm, 277 struct ieee80211_vif *vif, 278 struct ieee80211_ftm_responder_params *params) 279 { 280 int ret; 281 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP, 282 TOF_RESPONDER_DYN_CONFIG_CMD, 2); 283 284 switch (cmd_ver) { 285 case 2: 286 ret = iwl_mvm_ftm_responder_dyn_cfg_v2(mvm, vif, 287 params); 288 break; 289 case 3: 290 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif, 291 params, NULL); 292 break; 293 default: 294 IWL_ERR(mvm, "Unsupported DYN_CONFIG_CMD version %u\n", 295 cmd_ver); 296 ret = -ENOTSUPP; 297 } 298 299 return ret; 300 } 301 302 static void iwl_mvm_resp_del_pasn_sta(struct iwl_mvm *mvm, 303 struct ieee80211_vif *vif, 304 struct iwl_mvm_pasn_sta *sta) 305 { 306 list_del(&sta->list); 307 iwl_mvm_rm_sta_id(mvm, vif, sta->int_sta.sta_id); 308 iwl_mvm_dealloc_int_sta(mvm, &sta->int_sta); 309 kfree(sta); 310 } 311 312 int iwl_mvm_ftm_respoder_add_pasn_sta(struct iwl_mvm *mvm, 313 struct ieee80211_vif *vif, 314 u8 *addr, u32 cipher, u8 *tk, u32 tk_len, 315 u8 *hltk, u32 hltk_len) 316 { 317 int ret; 318 struct iwl_mvm_pasn_sta *sta = NULL; 319 struct iwl_mvm_pasn_hltk_data hltk_data = { 320 .addr = addr, 321 .hltk = hltk, 322 }; 323 u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, LOCATION_GROUP, 324 TOF_RESPONDER_DYN_CONFIG_CMD, 2); 325 326 lockdep_assert_held(&mvm->mutex); 327 328 if (cmd_ver < 3) { 329 IWL_ERR(mvm, "Adding PASN station not supported by FW\n"); 330 return -ENOTSUPP; 331 } 332 333 hltk_data.cipher = iwl_mvm_cipher_to_location_cipher(cipher); 334 if (hltk_data.cipher == IWL_LOCATION_CIPHER_INVALID) { 335 IWL_ERR(mvm, "invalid cipher: %u\n", cipher); 336 return -EINVAL; 337 } 338 339 if (tk && tk_len) { 340 sta = kzalloc(sizeof(*sta), GFP_KERNEL); 341 if (!sta) 342 return -ENOBUFS; 343 344 ret = iwl_mvm_add_pasn_sta(mvm, vif, &sta->int_sta, addr, 345 cipher, tk, tk_len); 346 if (ret) { 347 kfree(sta); 348 return ret; 349 } 350 351 memcpy(sta->addr, addr, ETH_ALEN); 352 list_add_tail(&sta->list, &mvm->resp_pasn_list); 353 } 354 355 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif, NULL, &hltk_data); 356 if (ret && sta) 357 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta); 358 359 return ret; 360 } 361 362 int iwl_mvm_ftm_resp_remove_pasn_sta(struct iwl_mvm *mvm, 363 struct ieee80211_vif *vif, u8 *addr) 364 { 365 struct iwl_mvm_pasn_sta *sta, *prev; 366 367 lockdep_assert_held(&mvm->mutex); 368 369 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list) { 370 if (!memcmp(sta->addr, addr, ETH_ALEN)) { 371 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta); 372 return 0; 373 } 374 } 375 376 IWL_ERR(mvm, "FTM: PASN station %pM not found\n", addr); 377 return -EINVAL; 378 } 379 380 int iwl_mvm_ftm_start_responder(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 381 { 382 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 383 struct ieee80211_ftm_responder_params *params; 384 struct ieee80211_chanctx_conf ctx, *pctx; 385 u16 *phy_ctxt_id; 386 struct iwl_mvm_phy_ctxt *phy_ctxt; 387 int ret; 388 389 params = vif->bss_conf.ftmr_params; 390 391 lockdep_assert_held(&mvm->mutex); 392 393 if (WARN_ON_ONCE(!vif->bss_conf.ftm_responder)) 394 return -EINVAL; 395 396 if (vif->p2p || vif->type != NL80211_IFTYPE_AP || 397 !mvmvif->ap_ibss_active) { 398 IWL_ERR(mvm, "Cannot start responder, not in AP mode\n"); 399 return -EIO; 400 } 401 402 rcu_read_lock(); 403 pctx = rcu_dereference(vif->chanctx_conf); 404 /* Copy the ctx to unlock the rcu and send the phy ctxt. We don't care 405 * about changes in the ctx after releasing the lock because the driver 406 * is still protected by the mutex. */ 407 ctx = *pctx; 408 phy_ctxt_id = (u16 *)pctx->drv_priv; 409 rcu_read_unlock(); 410 411 phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id]; 412 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx.def, 413 ctx.rx_chains_static, 414 ctx.rx_chains_dynamic); 415 if (ret) 416 return ret; 417 418 ret = iwl_mvm_ftm_responder_cmd(mvm, vif, &ctx.def); 419 if (ret) 420 return ret; 421 422 if (params) 423 ret = iwl_mvm_ftm_responder_dyn_cfg_cmd(mvm, vif, params); 424 425 return ret; 426 } 427 428 void iwl_mvm_ftm_responder_clear(struct iwl_mvm *mvm, 429 struct ieee80211_vif *vif) 430 { 431 struct iwl_mvm_pasn_sta *sta, *prev; 432 433 lockdep_assert_held(&mvm->mutex); 434 435 list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list) 436 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta); 437 } 438 439 void iwl_mvm_ftm_restart_responder(struct iwl_mvm *mvm, 440 struct ieee80211_vif *vif) 441 { 442 if (!vif->bss_conf.ftm_responder) 443 return; 444 445 iwl_mvm_ftm_responder_clear(mvm, vif); 446 iwl_mvm_ftm_start_responder(mvm, vif); 447 } 448 449 void iwl_mvm_ftm_responder_stats(struct iwl_mvm *mvm, 450 struct iwl_rx_cmd_buffer *rxb) 451 { 452 struct iwl_rx_packet *pkt = rxb_addr(rxb); 453 struct iwl_ftm_responder_stats *resp = (void *)pkt->data; 454 struct cfg80211_ftm_responder_stats *stats = &mvm->ftm_resp_stats; 455 u32 flags = le32_to_cpu(resp->flags); 456 457 if (resp->success_ftm == resp->ftm_per_burst) 458 stats->success_num++; 459 else if (resp->success_ftm >= 2) 460 stats->partial_num++; 461 else 462 stats->failed_num++; 463 464 if ((flags & FTM_RESP_STAT_ASAP_REQ) && 465 (flags & FTM_RESP_STAT_ASAP_RESP)) 466 stats->asap_num++; 467 468 if (flags & FTM_RESP_STAT_NON_ASAP_RESP) 469 stats->non_asap_num++; 470 471 stats->total_duration_ms += le32_to_cpu(resp->duration) / USEC_PER_MSEC; 472 473 if (flags & FTM_RESP_STAT_TRIGGER_UNKNOWN) 474 stats->unknown_triggers_num++; 475 476 if (flags & FTM_RESP_STAT_DUP) 477 stats->reschedule_requests_num++; 478 479 if (flags & FTM_RESP_STAT_NON_ASAP_OUT_WIN) 480 stats->out_of_window_triggers_num++; 481 } 482