drivers/net/wireless/intel/iwlwifi/mvm/ftm-responder.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2015-2017 Intel Deutschland GmbH
   4  * Copyright (C) 2018-2023 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         /* must be last as it followed by buffer holding the key */
  17         struct ieee80211_key_conf keyconf;
  18 };
  19
  20 struct iwl_mvm_pasn_hltk_data {
  21         u8 *addr;
  22         u8 cipher;
  23         u8 *hltk;
  24 };
  25
  26 static int iwl_mvm_ftm_responder_set_bw_v1(struct cfg80211_chan_def *chandef,
  27                                            u8 *bw, u8 *ctrl_ch_position)
  28 {
  29         switch (chandef->width) {
  30         case NL80211_CHAN_WIDTH_20_NOHT:
  31                 *bw = IWL_TOF_BW_20_LEGACY;
  32                 break;
  33         case NL80211_CHAN_WIDTH_20:
  34                 *bw = IWL_TOF_BW_20_HT;
  35                 break;
  36         case NL80211_CHAN_WIDTH_40:
  37                 *bw = IWL_TOF_BW_40;
  38                 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
  39                 break;
  40         case NL80211_CHAN_WIDTH_80:
  41                 *bw = IWL_TOF_BW_80;
  42                 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
  43                 break;
  44         default:
  45                 return -EOPNOTSUPP;
  46         }
  47
  48         return 0;
  49 }
  50
  51 static int iwl_mvm_ftm_responder_set_bw_v2(struct cfg80211_chan_def *chandef,
  52                                            u8 *format_bw, u8 *ctrl_ch_position,
  53                                            u8 cmd_ver)
  54 {
  55         switch (chandef->width) {
  56         case NL80211_CHAN_WIDTH_20_NOHT:
  57                 *format_bw = IWL_LOCATION_FRAME_FORMAT_LEGACY;
  58                 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
  59                 break;
  60         case NL80211_CHAN_WIDTH_20:
  61                 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
  62                 *format_bw |= IWL_LOCATION_BW_20MHZ << LOCATION_BW_POS;
  63                 break;
  64         case NL80211_CHAN_WIDTH_40:
  65                 *format_bw = IWL_LOCATION_FRAME_FORMAT_HT;
  66                 *format_bw |= IWL_LOCATION_BW_40MHZ << LOCATION_BW_POS;
  67                 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
  68                 break;
  69         case NL80211_CHAN_WIDTH_80:
  70                 *format_bw = IWL_LOCATION_FRAME_FORMAT_VHT;
  71                 *format_bw |= IWL_LOCATION_BW_80MHZ << LOCATION_BW_POS;
  72                 *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
  73                 break;
  74         case NL80211_CHAN_WIDTH_160:
  75                 if (cmd_ver >= 9) {
  76                         *format_bw = IWL_LOCATION_FRAME_FORMAT_HE;
  77                         *format_bw |= IWL_LOCATION_BW_160MHZ << LOCATION_BW_POS;
  78                         *ctrl_ch_position = iwl_mvm_get_ctrl_pos(chandef);
  79                         break;
  80                 }
  81                 fallthrough;
  82         default:
  83                 return -EOPNOTSUPP;
  84         }
  85
  86         return 0;
  87 }
  88
  89 static void
  90 iwl_mvm_ftm_responder_set_ndp(struct iwl_mvm *mvm,
  91                               struct iwl_tof_responder_config_cmd_v9 *cmd)
  92 {
  93         /* Up to 2 R2I STS are allowed on the responder */
  94         u32 r2i_max_sts = IWL_MVM_FTM_R2I_MAX_STS < 2 ?
  95                 IWL_MVM_FTM_R2I_MAX_STS : 1;
  96
  97         cmd->r2i_ndp_params = IWL_MVM_FTM_R2I_MAX_REP |
  98                 (r2i_max_sts << IWL_RESPONDER_STS_POS) |
  99                 (IWL_MVM_FTM_R2I_MAX_TOTAL_LTF << IWL_RESPONDER_TOTAL_LTF_POS);
 100         cmd->i2r_ndp_params = IWL_MVM_FTM_I2R_MAX_REP |
 101                 (IWL_MVM_FTM_I2R_MAX_STS << IWL_RESPONDER_STS_POS) |
 102                 (IWL_MVM_FTM_I2R_MAX_TOTAL_LTF << IWL_RESPONDER_TOTAL_LTF_POS);
 103         cmd->cmd_valid_fields |=
 104                 cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_NDP_PARAMS);
 105 }
 106
 107 static int
 108 iwl_mvm_ftm_responder_cmd(struct iwl_mvm *mvm,
 109                           struct ieee80211_vif *vif,
 110                           struct cfg80211_chan_def *chandef,
 111                           struct ieee80211_bss_conf *link_conf)
 112 {
 113         u32 cmd_id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_CONFIG_CMD);
 114         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 115         /*
 116          * The command structure is the same for versions 6, 7 and 8 (only the
 117          * field interpretation is different), so the same struct can be use
 118          * for all cases.
 119          */
 120         struct iwl_tof_responder_config_cmd_v9 cmd = {
 121                 .channel_num = chandef->chan->hw_value,
 122                 .cmd_valid_fields =
 123                         cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_CHAN_INFO |
 124                                     IWL_TOF_RESPONDER_CMD_VALID_BSSID |
 125                                     IWL_TOF_RESPONDER_CMD_VALID_STA_ID),
 126                 .sta_id = mvmvif->link[link_conf->link_id]->bcast_sta.sta_id,
 127         };
 128         u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw, cmd_id, 6);
 129         int err;
 130         int cmd_size;
 131
 132         lockdep_assert_held(&mvm->mutex);
 133
 134         /* Use a default of bss_color=1 for now */
 135         if (cmd_ver == 9) {
 136                 cmd.cmd_valid_fields |=
 137                         cpu_to_le32(IWL_TOF_RESPONDER_CMD_VALID_BSS_COLOR |
 138                                     IWL_TOF_RESPONDER_CMD_VALID_MIN_MAX_TIME_BETWEEN_MSR);
 139                 cmd.bss_color = 1;
 140                 cmd.min_time_between_msr =
 141                         cpu_to_le16(IWL_MVM_FTM_NON_TB_MIN_TIME_BETWEEN_MSR);
 142                 cmd.max_time_between_msr =
 143                         cpu_to_le16(IWL_MVM_FTM_NON_TB_MAX_TIME_BETWEEN_MSR);
 144                 cmd_size = sizeof(struct iwl_tof_responder_config_cmd_v9);
 145         } else {
 146                 /* All versions up to version 8 have the same size */
 147                 cmd_size = sizeof(struct iwl_tof_responder_config_cmd_v8);
 148         }
 149
 150         if (cmd_ver >= 8)
 151                 iwl_mvm_ftm_responder_set_ndp(mvm, &cmd);
 152
 153         if (cmd_ver >= 7)
 154                 err = iwl_mvm_ftm_responder_set_bw_v2(chandef, &cmd.format_bw,
 155                                                       &cmd.ctrl_ch_position,
 156                                                       cmd_ver);
 157         else
 158                 err = iwl_mvm_ftm_responder_set_bw_v1(chandef, &cmd.format_bw,
 159                                                       &cmd.ctrl_ch_position);
 160
 161         if (err) {
 162                 IWL_ERR(mvm, "Failed to set responder bandwidth\n");
 163                 return err;
 164         }
 165
 166         memcpy(cmd.bssid, vif->addr, ETH_ALEN);
 167
 168         return iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, cmd_size, &cmd);
 169 }
 170
 171 static int
 172 iwl_mvm_ftm_responder_dyn_cfg_v2(struct iwl_mvm *mvm,
 173                                  struct ieee80211_vif *vif,
 174                                  struct ieee80211_ftm_responder_params *params)
 175 {
 176         struct iwl_tof_responder_dyn_config_cmd_v2 cmd = {
 177                 .lci_len = cpu_to_le32(params->lci_len + 2),
 178                 .civic_len = cpu_to_le32(params->civicloc_len + 2),
 179         };
 180         u8 data[IWL_LCI_CIVIC_IE_MAX_SIZE] = {0};
 181         struct iwl_host_cmd hcmd = {
 182                 .id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
 183                 .data[0] = &cmd,
 184                 .len[0] = sizeof(cmd),
 185                 .data[1] = &data,
 186                 /* .len[1] set later */
 187                 /* may not be able to DMA from stack */
 188                 .dataflags[1] = IWL_HCMD_DFL_DUP,
 189         };
 190         u32 aligned_lci_len = ALIGN(params->lci_len + 2, 4);
 191         u32 aligned_civicloc_len = ALIGN(params->civicloc_len + 2, 4);
 192         u8 *pos = data;
 193
 194         lockdep_assert_held(&mvm->mutex);
 195
 196         if (aligned_lci_len + aligned_civicloc_len > sizeof(data)) {
 197                 IWL_ERR(mvm, "LCI/civicloc data too big (%zd + %zd)\n",
 198                         params->lci_len, params->civicloc_len);
 199                 return -ENOBUFS;
 200         }
 201
 202         pos[0] = WLAN_EID_MEASURE_REPORT;
 203         pos[1] = params->lci_len;
 204         memcpy(pos + 2, params->lci, params->lci_len);
 205
 206         pos += aligned_lci_len;
 207         pos[0] = WLAN_EID_MEASURE_REPORT;
 208         pos[1] = params->civicloc_len;
 209         memcpy(pos + 2, params->civicloc, params->civicloc_len);
 210
 211         hcmd.len[1] = aligned_lci_len + aligned_civicloc_len;
 212
 213         return iwl_mvm_send_cmd(mvm, &hcmd);
 214 }
 215
 216 static int
 217 iwl_mvm_ftm_responder_dyn_cfg_v3(struct iwl_mvm *mvm,
 218                                  struct ieee80211_vif *vif,
 219                                  struct ieee80211_ftm_responder_params *params,
 220                                  struct iwl_mvm_pasn_hltk_data *hltk_data)
 221 {
 222         struct iwl_tof_responder_dyn_config_cmd cmd;
 223         struct iwl_host_cmd hcmd = {
 224                 .id = WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
 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,
 282                                            WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
 283                                            2);
 284
 285         switch (cmd_ver) {
 286         case 2:
 287                 ret = iwl_mvm_ftm_responder_dyn_cfg_v2(mvm, vif,
 288                                                        params);
 289                 break;
 290         case 3:
 291                 ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif,
 292                                                        params, NULL);
 293                 break;
 294         default:
 295                 IWL_ERR(mvm, "Unsupported DYN_CONFIG_CMD version %u\n",
 296                         cmd_ver);
 297                 ret = -EOPNOTSUPP;
 298         }
 299
 300         return ret;
 301 }
 302
 303 static void iwl_mvm_resp_del_pasn_sta(struct iwl_mvm *mvm,
 304                                       struct ieee80211_vif *vif,
 305                                       struct iwl_mvm_pasn_sta *sta)
 306 {
 307         list_del(&sta->list);
 308
 309         if (sta->keyconf.keylen)
 310                 iwl_mvm_sec_key_del_pasn(mvm, vif, BIT(sta->int_sta.sta_id),
 311                                          &sta->keyconf);
 312
 313         if (iwl_mvm_has_mld_api(mvm->fw))
 314                 iwl_mvm_mld_rm_sta_id(mvm, sta->int_sta.sta_id);
 315         else
 316                 iwl_mvm_rm_sta_id(mvm, vif, sta->int_sta.sta_id);
 317
 318         iwl_mvm_dealloc_int_sta(mvm, &sta->int_sta);
 319         kfree(sta);
 320 }
 321
 322 int iwl_mvm_ftm_respoder_add_pasn_sta(struct iwl_mvm *mvm,
 323                                       struct ieee80211_vif *vif,
 324                                       u8 *addr, u32 cipher, u8 *tk, u32 tk_len,
 325                                       u8 *hltk, u32 hltk_len)
 326 {
 327         int ret;
 328         struct iwl_mvm_pasn_sta *sta = NULL;
 329         struct iwl_mvm_pasn_hltk_data hltk_data = {
 330                 .addr = addr,
 331                 .hltk = hltk,
 332         };
 333         struct iwl_mvm_pasn_hltk_data *hltk_data_ptr = NULL;
 334
 335         u8 cmd_ver = iwl_fw_lookup_cmd_ver(mvm->fw,
 336                                            WIDE_ID(LOCATION_GROUP, TOF_RESPONDER_DYN_CONFIG_CMD),
 337                                            2);
 338
 339         lockdep_assert_held(&mvm->mutex);
 340
 341         if (cmd_ver < 3) {
 342                 IWL_ERR(mvm, "Adding PASN station not supported by FW\n");
 343                 return -EOPNOTSUPP;
 344         }
 345
 346         if ((!hltk || !hltk_len) && (!tk || !tk_len)) {
 347                 IWL_ERR(mvm, "TK and HLTK not set\n");
 348                 return -EINVAL;
 349         }
 350
 351         if (hltk && hltk_len) {
 352                 if (!fw_has_capa(&mvm->fw->ucode_capa,
 353                                  IWL_UCODE_TLV_CAPA_SECURE_LTF_SUPPORT)) {
 354                         IWL_ERR(mvm, "No support for secure LTF measurement\n");
 355                         return -EINVAL;
 356                 }
 357
 358                 hltk_data.cipher = iwl_mvm_cipher_to_location_cipher(cipher);
 359                 if (hltk_data.cipher == IWL_LOCATION_CIPHER_INVALID) {
 360                         IWL_ERR(mvm, "invalid cipher: %u\n", cipher);
 361                         return -EINVAL;
 362                 }
 363
 364                 hltk_data_ptr = &hltk_data;
 365         }
 366
 367         if (tk && tk_len) {
 368                 sta = kzalloc(sizeof(*sta) + tk_len, GFP_KERNEL);
 369                 if (!sta)
 370                         return -ENOBUFS;
 371
 372                 ret = iwl_mvm_add_pasn_sta(mvm, vif, &sta->int_sta, addr,
 373                                            cipher, tk, tk_len, &sta->keyconf);
 374                 if (ret) {
 375                         kfree(sta);
 376                         return ret;
 377                 }
 378
 379                 memcpy(sta->addr, addr, ETH_ALEN);
 380                 list_add_tail(&sta->list, &mvm->resp_pasn_list);
 381         }
 382
 383         ret = iwl_mvm_ftm_responder_dyn_cfg_v3(mvm, vif, NULL, hltk_data_ptr);
 384         if (ret && sta)
 385                 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
 386
 387         return ret;
 388 }
 389
 390 int iwl_mvm_ftm_resp_remove_pasn_sta(struct iwl_mvm *mvm,
 391                                      struct ieee80211_vif *vif, u8 *addr)
 392 {
 393         struct iwl_mvm_pasn_sta *sta, *prev;
 394
 395         lockdep_assert_held(&mvm->mutex);
 396
 397         list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list) {
 398                 if (!memcmp(sta->addr, addr, ETH_ALEN)) {
 399                         iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
 400                         return 0;
 401                 }
 402         }
 403
 404         IWL_ERR(mvm, "FTM: PASN station %pM not found\n", addr);
 405         return -EINVAL;
 406 }
 407
 408 int iwl_mvm_ftm_start_responder(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 409                                 struct ieee80211_bss_conf *bss_conf)
 410 {
 411         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 412         struct ieee80211_ftm_responder_params *params;
 413         struct ieee80211_chanctx_conf ctx, *pctx;
 414         u16 *phy_ctxt_id;
 415         struct iwl_mvm_phy_ctxt *phy_ctxt;
 416         int ret;
 417
 418         params = bss_conf->ftmr_params;
 419
 420         lockdep_assert_held(&mvm->mutex);
 421
 422         if (WARN_ON_ONCE(!bss_conf->ftm_responder))
 423                 return -EINVAL;
 424
 425         if (vif->p2p || vif->type != NL80211_IFTYPE_AP ||
 426             !mvmvif->ap_ibss_active) {
 427                 IWL_ERR(mvm, "Cannot start responder, not in AP mode\n");
 428                 return -EIO;
 429         }
 430
 431         rcu_read_lock();
 432         pctx = rcu_dereference(bss_conf->chanctx_conf);
 433         /* Copy the ctx to unlock the rcu and send the phy ctxt. We don't care
 434          * about changes in the ctx after releasing the lock because the driver
 435          * is still protected by the mutex. */
 436         ctx = *pctx;
 437         phy_ctxt_id  = (u16 *)pctx->drv_priv;
 438         rcu_read_unlock();
 439
 440         phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
 441         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx.def, &ctx.ap,
 442                                        ctx.rx_chains_static,
 443                                        ctx.rx_chains_dynamic);
 444         if (ret)
 445                 return ret;
 446
 447         ret = iwl_mvm_ftm_responder_cmd(mvm, vif, &ctx.def, bss_conf);
 448         if (ret)
 449                 return ret;
 450
 451         if (params)
 452                 ret = iwl_mvm_ftm_responder_dyn_cfg_cmd(mvm, vif, params);
 453
 454         return ret;
 455 }
 456
 457 void iwl_mvm_ftm_responder_clear(struct iwl_mvm *mvm,
 458                                  struct ieee80211_vif *vif)
 459 {
 460         struct iwl_mvm_pasn_sta *sta, *prev;
 461
 462         lockdep_assert_held(&mvm->mutex);
 463
 464         list_for_each_entry_safe(sta, prev, &mvm->resp_pasn_list, list)
 465                 iwl_mvm_resp_del_pasn_sta(mvm, vif, sta);
 466 }
 467
 468 void iwl_mvm_ftm_restart_responder(struct iwl_mvm *mvm,
 469                                    struct ieee80211_vif *vif,
 470                                    struct ieee80211_bss_conf *bss_conf)
 471 {
 472         if (!bss_conf->ftm_responder)
 473                 return;
 474
 475         iwl_mvm_ftm_responder_clear(mvm, vif);
 476         iwl_mvm_ftm_start_responder(mvm, vif, bss_conf);
 477 }
 478
 479 void iwl_mvm_ftm_responder_stats(struct iwl_mvm *mvm,
 480                                  struct iwl_rx_cmd_buffer *rxb)
 481 {
 482         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 483         struct iwl_ftm_responder_stats *resp = (void *)pkt->data;
 484         struct cfg80211_ftm_responder_stats *stats = &mvm->ftm_resp_stats;
 485         u32 flags = le32_to_cpu(resp->flags);
 486
 487         if (resp->success_ftm == resp->ftm_per_burst)
 488                 stats->success_num++;
 489         else if (resp->success_ftm >= 2)
 490                 stats->partial_num++;
 491         else
 492                 stats->failed_num++;
 493
 494         if ((flags & FTM_RESP_STAT_ASAP_REQ) &&
 495             (flags & FTM_RESP_STAT_ASAP_RESP))
 496                 stats->asap_num++;
 497
 498         if (flags & FTM_RESP_STAT_NON_ASAP_RESP)
 499                 stats->non_asap_num++;
 500
 501         stats->total_duration_ms += le32_to_cpu(resp->duration) / USEC_PER_MSEC;
 502
 503         if (flags & FTM_RESP_STAT_TRIGGER_UNKNOWN)
 504                 stats->unknown_triggers_num++;
 505
 506         if (flags & FTM_RESP_STAT_DUP)
 507                 stats->reschedule_requests_num++;
 508
 509         if (flags & FTM_RESP_STAT_NON_ASAP_OUT_WIN)
 510                 stats->out_of_window_triggers_num++;
 511 }