1 /****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 4 * Copyright(c) 2015 Intel Deutschland GmbH 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of version 2 of the GNU General Public License as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13 * more details. 14 * 15 * You should have received a copy of the GNU General Public License along with 16 * this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 18 * 19 * The full GNU General Public License is included in this distribution in the 20 * file called LICENSE. 21 * 22 * Contact Information: 23 * Intel Linux Wireless <linuxwifi@intel.com> 24 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 25 * 26 *****************************************************************************/ 27 28 #include <linux/etherdevice.h> 29 #include "iwl-trans.h" 30 #include "iwl-modparams.h" 31 #include "dev.h" 32 #include "agn.h" 33 #include "calib.h" 34 35 /* 36 * initialize rxon structure with default values from eeprom 37 */ 38 void iwl_connection_init_rx_config(struct iwl_priv *priv, 39 struct iwl_rxon_context *ctx) 40 { 41 memset(&ctx->staging, 0, sizeof(ctx->staging)); 42 43 if (!ctx->vif) { 44 ctx->staging.dev_type = ctx->unused_devtype; 45 } else 46 switch (ctx->vif->type) { 47 case NL80211_IFTYPE_AP: 48 ctx->staging.dev_type = ctx->ap_devtype; 49 break; 50 51 case NL80211_IFTYPE_STATION: 52 ctx->staging.dev_type = ctx->station_devtype; 53 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK; 54 break; 55 56 case NL80211_IFTYPE_ADHOC: 57 ctx->staging.dev_type = ctx->ibss_devtype; 58 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK; 59 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK | 60 RXON_FILTER_ACCEPT_GRP_MSK; 61 break; 62 63 case NL80211_IFTYPE_MONITOR: 64 ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER; 65 break; 66 67 default: 68 IWL_ERR(priv, "Unsupported interface type %d\n", 69 ctx->vif->type); 70 break; 71 } 72 73 #if 0 74 /* TODO: Figure out when short_preamble would be set and cache from 75 * that */ 76 if (!hw_to_local(priv->hw)->short_preamble) 77 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; 78 else 79 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; 80 #endif 81 82 ctx->staging.channel = 83 cpu_to_le16(priv->hw->conf.chandef.chan->hw_value); 84 priv->band = priv->hw->conf.chandef.chan->band; 85 86 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif); 87 88 /* clear both MIX and PURE40 mode flag */ 89 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED | 90 RXON_FLG_CHANNEL_MODE_PURE_40); 91 if (ctx->vif) 92 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN); 93 94 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff; 95 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff; 96 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff; 97 } 98 99 static int iwlagn_disable_bss(struct iwl_priv *priv, 100 struct iwl_rxon_context *ctx, 101 struct iwl_rxon_cmd *send) 102 { 103 __le32 old_filter = send->filter_flags; 104 int ret; 105 106 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK; 107 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 108 0, sizeof(*send), send); 109 110 send->filter_flags = old_filter; 111 112 if (ret) 113 IWL_DEBUG_QUIET_RFKILL(priv, 114 "Error clearing ASSOC_MSK on BSS (%d)\n", ret); 115 116 return ret; 117 } 118 119 static int iwlagn_disable_pan(struct iwl_priv *priv, 120 struct iwl_rxon_context *ctx, 121 struct iwl_rxon_cmd *send) 122 { 123 struct iwl_notification_wait disable_wait; 124 __le32 old_filter = send->filter_flags; 125 u8 old_dev_type = send->dev_type; 126 int ret; 127 static const u16 deactivate_cmd[] = { 128 REPLY_WIPAN_DEACTIVATION_COMPLETE 129 }; 130 131 iwl_init_notification_wait(&priv->notif_wait, &disable_wait, 132 deactivate_cmd, ARRAY_SIZE(deactivate_cmd), 133 NULL, NULL); 134 135 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK; 136 send->dev_type = RXON_DEV_TYPE_P2P; 137 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 138 0, sizeof(*send), send); 139 140 send->filter_flags = old_filter; 141 send->dev_type = old_dev_type; 142 143 if (ret) { 144 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret); 145 iwl_remove_notification(&priv->notif_wait, &disable_wait); 146 } else { 147 ret = iwl_wait_notification(&priv->notif_wait, 148 &disable_wait, HZ); 149 if (ret) 150 IWL_ERR(priv, "Timed out waiting for PAN disable\n"); 151 } 152 153 return ret; 154 } 155 156 static int iwlagn_disconn_pan(struct iwl_priv *priv, 157 struct iwl_rxon_context *ctx, 158 struct iwl_rxon_cmd *send) 159 { 160 __le32 old_filter = send->filter_flags; 161 int ret; 162 163 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK; 164 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0, 165 sizeof(*send), send); 166 167 send->filter_flags = old_filter; 168 169 return ret; 170 } 171 172 static void iwlagn_update_qos(struct iwl_priv *priv, 173 struct iwl_rxon_context *ctx) 174 { 175 int ret; 176 177 if (!ctx->is_active) 178 return; 179 180 ctx->qos_data.def_qos_parm.qos_flags = 0; 181 182 if (ctx->qos_data.qos_active) 183 ctx->qos_data.def_qos_parm.qos_flags |= 184 QOS_PARAM_FLG_UPDATE_EDCA_MSK; 185 186 if (ctx->ht.enabled) 187 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK; 188 189 IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n", 190 ctx->qos_data.qos_active, 191 ctx->qos_data.def_qos_parm.qos_flags); 192 193 ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, 0, 194 sizeof(struct iwl_qosparam_cmd), 195 &ctx->qos_data.def_qos_parm); 196 if (ret) 197 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n"); 198 } 199 200 static int iwlagn_update_beacon(struct iwl_priv *priv, 201 struct ieee80211_vif *vif) 202 { 203 lockdep_assert_held(&priv->mutex); 204 205 dev_kfree_skb(priv->beacon_skb); 206 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif); 207 if (!priv->beacon_skb) 208 return -ENOMEM; 209 return iwlagn_send_beacon_cmd(priv); 210 } 211 212 static int iwlagn_send_rxon_assoc(struct iwl_priv *priv, 213 struct iwl_rxon_context *ctx) 214 { 215 int ret = 0; 216 struct iwl_rxon_assoc_cmd rxon_assoc; 217 const struct iwl_rxon_cmd *rxon1 = &ctx->staging; 218 const struct iwl_rxon_cmd *rxon2 = &ctx->active; 219 220 if ((rxon1->flags == rxon2->flags) && 221 (rxon1->filter_flags == rxon2->filter_flags) && 222 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) && 223 (rxon1->ofdm_ht_single_stream_basic_rates == 224 rxon2->ofdm_ht_single_stream_basic_rates) && 225 (rxon1->ofdm_ht_dual_stream_basic_rates == 226 rxon2->ofdm_ht_dual_stream_basic_rates) && 227 (rxon1->ofdm_ht_triple_stream_basic_rates == 228 rxon2->ofdm_ht_triple_stream_basic_rates) && 229 (rxon1->acquisition_data == rxon2->acquisition_data) && 230 (rxon1->rx_chain == rxon2->rx_chain) && 231 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) { 232 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n"); 233 return 0; 234 } 235 236 rxon_assoc.flags = ctx->staging.flags; 237 rxon_assoc.filter_flags = ctx->staging.filter_flags; 238 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates; 239 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates; 240 rxon_assoc.reserved1 = 0; 241 rxon_assoc.reserved2 = 0; 242 rxon_assoc.reserved3 = 0; 243 rxon_assoc.ofdm_ht_single_stream_basic_rates = 244 ctx->staging.ofdm_ht_single_stream_basic_rates; 245 rxon_assoc.ofdm_ht_dual_stream_basic_rates = 246 ctx->staging.ofdm_ht_dual_stream_basic_rates; 247 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain; 248 rxon_assoc.ofdm_ht_triple_stream_basic_rates = 249 ctx->staging.ofdm_ht_triple_stream_basic_rates; 250 rxon_assoc.acquisition_data = ctx->staging.acquisition_data; 251 252 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd, 253 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc); 254 return ret; 255 } 256 257 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val) 258 { 259 u16 new_val; 260 u16 beacon_factor; 261 262 /* 263 * If mac80211 hasn't given us a beacon interval, program 264 * the default into the device (not checking this here 265 * would cause the adjustment below to return the maximum 266 * value, which may break PAN.) 267 */ 268 if (!beacon_val) 269 return DEFAULT_BEACON_INTERVAL; 270 271 /* 272 * If the beacon interval we obtained from the peer 273 * is too large, we'll have to wake up more often 274 * (and in IBSS case, we'll beacon too much) 275 * 276 * For example, if max_beacon_val is 4096, and the 277 * requested beacon interval is 7000, we'll have to 278 * use 3500 to be able to wake up on the beacons. 279 * 280 * This could badly influence beacon detection stats. 281 */ 282 283 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val; 284 new_val = beacon_val / beacon_factor; 285 286 if (!new_val) 287 new_val = max_beacon_val; 288 289 return new_val; 290 } 291 292 static int iwl_send_rxon_timing(struct iwl_priv *priv, 293 struct iwl_rxon_context *ctx) 294 { 295 u64 tsf; 296 s32 interval_tm, rem; 297 struct ieee80211_conf *conf = NULL; 298 u16 beacon_int; 299 struct ieee80211_vif *vif = ctx->vif; 300 301 conf = &priv->hw->conf; 302 303 lockdep_assert_held(&priv->mutex); 304 305 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd)); 306 307 ctx->timing.timestamp = cpu_to_le64(priv->timestamp); 308 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval); 309 310 beacon_int = vif ? vif->bss_conf.beacon_int : 0; 311 312 /* 313 * TODO: For IBSS we need to get atim_window from mac80211, 314 * for now just always use 0 315 */ 316 ctx->timing.atim_window = 0; 317 318 if (ctx->ctxid == IWL_RXON_CTX_PAN && 319 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) && 320 iwl_is_associated(priv, IWL_RXON_CTX_BSS) && 321 priv->contexts[IWL_RXON_CTX_BSS].vif && 322 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) { 323 ctx->timing.beacon_interval = 324 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval; 325 beacon_int = le16_to_cpu(ctx->timing.beacon_interval); 326 } else if (ctx->ctxid == IWL_RXON_CTX_BSS && 327 iwl_is_associated(priv, IWL_RXON_CTX_PAN) && 328 priv->contexts[IWL_RXON_CTX_PAN].vif && 329 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int && 330 (!iwl_is_associated_ctx(ctx) || !ctx->vif || 331 !ctx->vif->bss_conf.beacon_int)) { 332 ctx->timing.beacon_interval = 333 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval; 334 beacon_int = le16_to_cpu(ctx->timing.beacon_interval); 335 } else { 336 beacon_int = iwl_adjust_beacon_interval(beacon_int, 337 IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT); 338 ctx->timing.beacon_interval = cpu_to_le16(beacon_int); 339 } 340 341 ctx->beacon_int = beacon_int; 342 343 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */ 344 interval_tm = beacon_int * TIME_UNIT; 345 rem = do_div(tsf, interval_tm); 346 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem); 347 348 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1; 349 350 IWL_DEBUG_ASSOC(priv, 351 "beacon interval %d beacon timer %d beacon tim %d\n", 352 le16_to_cpu(ctx->timing.beacon_interval), 353 le32_to_cpu(ctx->timing.beacon_init_val), 354 le16_to_cpu(ctx->timing.atim_window)); 355 356 return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd, 357 0, sizeof(ctx->timing), &ctx->timing); 358 } 359 360 static int iwlagn_rxon_disconn(struct iwl_priv *priv, 361 struct iwl_rxon_context *ctx) 362 { 363 int ret; 364 struct iwl_rxon_cmd *active = (void *)&ctx->active; 365 366 if (ctx->ctxid == IWL_RXON_CTX_BSS) { 367 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging); 368 } else { 369 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging); 370 if (ret) 371 return ret; 372 if (ctx->vif) { 373 ret = iwl_send_rxon_timing(priv, ctx); 374 if (ret) { 375 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret); 376 return ret; 377 } 378 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging); 379 } 380 } 381 if (ret) 382 return ret; 383 384 /* 385 * Un-assoc RXON clears the station table and WEP 386 * keys, so we have to restore those afterwards. 387 */ 388 iwl_clear_ucode_stations(priv, ctx); 389 /* update -- might need P2P now */ 390 iwl_update_bcast_station(priv, ctx); 391 iwl_restore_stations(priv, ctx); 392 ret = iwl_restore_default_wep_keys(priv, ctx); 393 if (ret) { 394 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret); 395 return ret; 396 } 397 398 memcpy(active, &ctx->staging, sizeof(*active)); 399 return 0; 400 } 401 402 static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force) 403 { 404 int ret; 405 s8 prev_tx_power; 406 bool defer; 407 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 408 409 if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED) 410 return 0; 411 412 lockdep_assert_held(&priv->mutex); 413 414 if (priv->tx_power_user_lmt == tx_power && !force) 415 return 0; 416 417 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) { 418 IWL_WARN(priv, 419 "Requested user TXPOWER %d below lower limit %d.\n", 420 tx_power, 421 IWLAGN_TX_POWER_TARGET_POWER_MIN); 422 return -EINVAL; 423 } 424 425 if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) { 426 IWL_WARN(priv, 427 "Requested user TXPOWER %d above upper limit %d.\n", 428 tx_power, priv->nvm_data->max_tx_pwr_half_dbm); 429 return -EINVAL; 430 } 431 432 if (!iwl_is_ready_rf(priv)) 433 return -EIO; 434 435 /* scan complete and commit_rxon use tx_power_next value, 436 * it always need to be updated for newest request */ 437 priv->tx_power_next = tx_power; 438 439 /* do not set tx power when scanning or channel changing */ 440 defer = test_bit(STATUS_SCANNING, &priv->status) || 441 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging)); 442 if (defer && !force) { 443 IWL_DEBUG_INFO(priv, "Deferring tx power set\n"); 444 return 0; 445 } 446 447 prev_tx_power = priv->tx_power_user_lmt; 448 priv->tx_power_user_lmt = tx_power; 449 450 ret = iwlagn_send_tx_power(priv); 451 452 /* if fail to set tx_power, restore the orig. tx power */ 453 if (ret) { 454 priv->tx_power_user_lmt = prev_tx_power; 455 priv->tx_power_next = prev_tx_power; 456 } 457 return ret; 458 } 459 460 static int iwlagn_rxon_connect(struct iwl_priv *priv, 461 struct iwl_rxon_context *ctx) 462 { 463 int ret; 464 struct iwl_rxon_cmd *active = (void *)&ctx->active; 465 466 /* RXON timing must be before associated RXON */ 467 if (ctx->ctxid == IWL_RXON_CTX_BSS) { 468 ret = iwl_send_rxon_timing(priv, ctx); 469 if (ret) { 470 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret); 471 return ret; 472 } 473 } 474 /* QoS info may be cleared by previous un-assoc RXON */ 475 iwlagn_update_qos(priv, ctx); 476 477 /* 478 * We'll run into this code path when beaconing is 479 * enabled, but then we also need to send the beacon 480 * to the device. 481 */ 482 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) { 483 ret = iwlagn_update_beacon(priv, ctx->vif); 484 if (ret) { 485 IWL_ERR(priv, 486 "Error sending required beacon (%d)!\n", 487 ret); 488 return ret; 489 } 490 } 491 492 priv->start_calib = 0; 493 /* 494 * Apply the new configuration. 495 * 496 * Associated RXON doesn't clear the station table in uCode, 497 * so we don't need to restore stations etc. after this. 498 */ 499 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0, 500 sizeof(struct iwl_rxon_cmd), &ctx->staging); 501 if (ret) { 502 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret); 503 return ret; 504 } 505 memcpy(active, &ctx->staging, sizeof(*active)); 506 507 /* IBSS beacon needs to be sent after setting assoc */ 508 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC)) 509 if (iwlagn_update_beacon(priv, ctx->vif)) 510 IWL_ERR(priv, "Error sending IBSS beacon\n"); 511 iwl_init_sensitivity(priv); 512 513 /* 514 * If we issue a new RXON command which required a tune then 515 * we must send a new TXPOWER command or we won't be able to 516 * Tx any frames. 517 * 518 * It's expected we set power here if channel is changing. 519 */ 520 ret = iwl_set_tx_power(priv, priv->tx_power_next, true); 521 if (ret) { 522 IWL_ERR(priv, "Error sending TX power (%d)\n", ret); 523 return ret; 524 } 525 526 return 0; 527 } 528 529 int iwlagn_set_pan_params(struct iwl_priv *priv) 530 { 531 struct iwl_wipan_params_cmd cmd; 532 struct iwl_rxon_context *ctx_bss, *ctx_pan; 533 int slot0 = 300, slot1 = 0; 534 int ret; 535 536 if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS)) 537 return 0; 538 539 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 540 541 lockdep_assert_held(&priv->mutex); 542 543 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS]; 544 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN]; 545 546 /* 547 * If the PAN context is inactive, then we don't need 548 * to update the PAN parameters, the last thing we'll 549 * have done before it goes inactive is making the PAN 550 * parameters be WLAN-only. 551 */ 552 if (!ctx_pan->is_active) 553 return 0; 554 555 memset(&cmd, 0, sizeof(cmd)); 556 557 /* only 2 slots are currently allowed */ 558 cmd.num_slots = 2; 559 560 cmd.slots[0].type = 0; /* BSS */ 561 cmd.slots[1].type = 1; /* PAN */ 562 563 if (ctx_bss->vif && ctx_pan->vif) { 564 int bcnint = ctx_pan->beacon_int; 565 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1; 566 567 /* should be set, but seems unused?? */ 568 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE); 569 570 if (ctx_pan->vif->type == NL80211_IFTYPE_AP && 571 bcnint && 572 bcnint != ctx_bss->beacon_int) { 573 IWL_ERR(priv, 574 "beacon intervals don't match (%d, %d)\n", 575 ctx_bss->beacon_int, ctx_pan->beacon_int); 576 } else 577 bcnint = max_t(int, bcnint, 578 ctx_bss->beacon_int); 579 if (!bcnint) 580 bcnint = DEFAULT_BEACON_INTERVAL; 581 slot0 = bcnint / 2; 582 slot1 = bcnint - slot0; 583 584 if (test_bit(STATUS_SCAN_HW, &priv->status) || 585 (!ctx_bss->vif->bss_conf.idle && 586 !ctx_bss->vif->bss_conf.assoc)) { 587 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME; 588 slot1 = IWL_MIN_SLOT_TIME; 589 } else if (!ctx_pan->vif->bss_conf.idle && 590 !ctx_pan->vif->bss_conf.assoc) { 591 slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME; 592 slot0 = IWL_MIN_SLOT_TIME; 593 } 594 } else if (ctx_pan->vif) { 595 slot0 = 0; 596 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) * 597 ctx_pan->beacon_int; 598 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1); 599 600 if (test_bit(STATUS_SCAN_HW, &priv->status)) { 601 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME; 602 slot1 = IWL_MIN_SLOT_TIME; 603 } 604 } 605 606 cmd.slots[0].width = cpu_to_le16(slot0); 607 cmd.slots[1].width = cpu_to_le16(slot1); 608 609 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, 0, 610 sizeof(cmd), &cmd); 611 if (ret) 612 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret); 613 614 return ret; 615 } 616 617 static void _iwl_set_rxon_ht(struct iwl_priv *priv, 618 struct iwl_ht_config *ht_conf, 619 struct iwl_rxon_context *ctx) 620 { 621 struct iwl_rxon_cmd *rxon = &ctx->staging; 622 623 if (!ctx->ht.enabled) { 624 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK | 625 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | 626 RXON_FLG_HT40_PROT_MSK | 627 RXON_FLG_HT_PROT_MSK); 628 return; 629 } 630 631 /* FIXME: if the definition of ht.protection changed, the "translation" 632 * will be needed for rxon->flags 633 */ 634 rxon->flags |= cpu_to_le32(ctx->ht.protection << 635 RXON_FLG_HT_OPERATING_MODE_POS); 636 637 /* Set up channel bandwidth: 638 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */ 639 /* clear the HT channel mode before set the mode */ 640 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK | 641 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); 642 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) { 643 /* pure ht40 */ 644 if (ctx->ht.protection == 645 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) { 646 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40; 647 /* 648 * Note: control channel is opposite of extension 649 * channel 650 */ 651 switch (ctx->ht.extension_chan_offset) { 652 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 653 rxon->flags &= 654 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; 655 break; 656 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 657 rxon->flags |= 658 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; 659 break; 660 } 661 } else { 662 /* 663 * Note: control channel is opposite of extension 664 * channel 665 */ 666 switch (ctx->ht.extension_chan_offset) { 667 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 668 rxon->flags &= 669 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK); 670 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED; 671 break; 672 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 673 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK; 674 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED; 675 break; 676 case IEEE80211_HT_PARAM_CHA_SEC_NONE: 677 default: 678 /* 679 * channel location only valid if in Mixed 680 * mode 681 */ 682 IWL_ERR(priv, 683 "invalid extension channel offset\n"); 684 break; 685 } 686 } 687 } else { 688 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY; 689 } 690 691 iwlagn_set_rxon_chain(priv, ctx); 692 693 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X " 694 "extension channel offset 0x%x\n", 695 le32_to_cpu(rxon->flags), ctx->ht.protection, 696 ctx->ht.extension_chan_offset); 697 } 698 699 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf) 700 { 701 struct iwl_rxon_context *ctx; 702 703 for_each_context(priv, ctx) 704 _iwl_set_rxon_ht(priv, ht_conf, ctx); 705 } 706 707 /** 708 * iwl_set_rxon_channel - Set the band and channel values in staging RXON 709 * @ch: requested channel as a pointer to struct ieee80211_channel 710 711 * NOTE: Does not commit to the hardware; it sets appropriate bit fields 712 * in the staging RXON flag structure based on the ch->band 713 */ 714 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch, 715 struct iwl_rxon_context *ctx) 716 { 717 enum nl80211_band band = ch->band; 718 u16 channel = ch->hw_value; 719 720 if ((le16_to_cpu(ctx->staging.channel) == channel) && 721 (priv->band == band)) 722 return; 723 724 ctx->staging.channel = cpu_to_le16(channel); 725 if (band == NL80211_BAND_5GHZ) 726 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK; 727 else 728 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK; 729 730 priv->band = band; 731 732 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band); 733 734 } 735 736 void iwl_set_flags_for_band(struct iwl_priv *priv, 737 struct iwl_rxon_context *ctx, 738 enum nl80211_band band, 739 struct ieee80211_vif *vif) 740 { 741 if (band == NL80211_BAND_5GHZ) { 742 ctx->staging.flags &= 743 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK 744 | RXON_FLG_CCK_MSK); 745 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; 746 } else { 747 /* Copied from iwl_post_associate() */ 748 if (vif && vif->bss_conf.use_short_slot) 749 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; 750 else 751 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK; 752 753 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK; 754 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK; 755 ctx->staging.flags &= ~RXON_FLG_CCK_MSK; 756 } 757 } 758 759 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, 760 struct iwl_rxon_context *ctx, int hw_decrypt) 761 { 762 struct iwl_rxon_cmd *rxon = &ctx->staging; 763 764 if (hw_decrypt) 765 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK; 766 else 767 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK; 768 769 } 770 771 /* validate RXON structure is valid */ 772 static int iwl_check_rxon_cmd(struct iwl_priv *priv, 773 struct iwl_rxon_context *ctx) 774 { 775 struct iwl_rxon_cmd *rxon = &ctx->staging; 776 u32 errors = 0; 777 778 if (rxon->flags & RXON_FLG_BAND_24G_MSK) { 779 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) { 780 IWL_WARN(priv, "check 2.4G: wrong narrow\n"); 781 errors |= BIT(0); 782 } 783 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) { 784 IWL_WARN(priv, "check 2.4G: wrong radar\n"); 785 errors |= BIT(1); 786 } 787 } else { 788 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) { 789 IWL_WARN(priv, "check 5.2G: not short slot!\n"); 790 errors |= BIT(2); 791 } 792 if (rxon->flags & RXON_FLG_CCK_MSK) { 793 IWL_WARN(priv, "check 5.2G: CCK!\n"); 794 errors |= BIT(3); 795 } 796 } 797 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) { 798 IWL_WARN(priv, "mac/bssid mcast!\n"); 799 errors |= BIT(4); 800 } 801 802 /* make sure basic rates 6Mbps and 1Mbps are supported */ 803 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 && 804 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) { 805 IWL_WARN(priv, "neither 1 nor 6 are basic\n"); 806 errors |= BIT(5); 807 } 808 809 if (le16_to_cpu(rxon->assoc_id) > 2007) { 810 IWL_WARN(priv, "aid > 2007\n"); 811 errors |= BIT(6); 812 } 813 814 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) 815 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) { 816 IWL_WARN(priv, "CCK and short slot\n"); 817 errors |= BIT(7); 818 } 819 820 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) 821 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) { 822 IWL_WARN(priv, "CCK and auto detect\n"); 823 errors |= BIT(8); 824 } 825 826 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK | 827 RXON_FLG_TGG_PROTECT_MSK)) == 828 RXON_FLG_TGG_PROTECT_MSK) { 829 IWL_WARN(priv, "TGg but no auto-detect\n"); 830 errors |= BIT(9); 831 } 832 833 if (rxon->channel == 0) { 834 IWL_WARN(priv, "zero channel is invalid\n"); 835 errors |= BIT(10); 836 } 837 838 WARN(errors, "Invalid RXON (%#x), channel %d", 839 errors, le16_to_cpu(rxon->channel)); 840 841 return errors ? -EINVAL : 0; 842 } 843 844 /** 845 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed 846 * @priv: staging_rxon is compared to active_rxon 847 * 848 * If the RXON structure is changing enough to require a new tune, 849 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that 850 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required. 851 */ 852 static int iwl_full_rxon_required(struct iwl_priv *priv, 853 struct iwl_rxon_context *ctx) 854 { 855 const struct iwl_rxon_cmd *staging = &ctx->staging; 856 const struct iwl_rxon_cmd *active = &ctx->active; 857 858 #define CHK(cond) \ 859 if ((cond)) { \ 860 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \ 861 return 1; \ 862 } 863 864 #define CHK_NEQ(c1, c2) \ 865 if ((c1) != (c2)) { \ 866 IWL_DEBUG_INFO(priv, "need full RXON - " \ 867 #c1 " != " #c2 " - %d != %d\n", \ 868 (c1), (c2)); \ 869 return 1; \ 870 } 871 872 /* These items are only settable from the full RXON command */ 873 CHK(!iwl_is_associated_ctx(ctx)); 874 CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr)); 875 CHK(!ether_addr_equal(staging->node_addr, active->node_addr)); 876 CHK(!ether_addr_equal(staging->wlap_bssid_addr, 877 active->wlap_bssid_addr)); 878 CHK_NEQ(staging->dev_type, active->dev_type); 879 CHK_NEQ(staging->channel, active->channel); 880 CHK_NEQ(staging->air_propagation, active->air_propagation); 881 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates, 882 active->ofdm_ht_single_stream_basic_rates); 883 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates, 884 active->ofdm_ht_dual_stream_basic_rates); 885 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates, 886 active->ofdm_ht_triple_stream_basic_rates); 887 CHK_NEQ(staging->assoc_id, active->assoc_id); 888 889 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can 890 * be updated with the RXON_ASSOC command -- however only some 891 * flag transitions are allowed using RXON_ASSOC */ 892 893 /* Check if we are not switching bands */ 894 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK, 895 active->flags & RXON_FLG_BAND_24G_MSK); 896 897 /* Check if we are switching association toggle */ 898 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK, 899 active->filter_flags & RXON_FILTER_ASSOC_MSK); 900 901 #undef CHK 902 #undef CHK_NEQ 903 904 return 0; 905 } 906 907 #ifdef CONFIG_IWLWIFI_DEBUG 908 void iwl_print_rx_config_cmd(struct iwl_priv *priv, 909 enum iwl_rxon_context_id ctxid) 910 { 911 struct iwl_rxon_context *ctx = &priv->contexts[ctxid]; 912 struct iwl_rxon_cmd *rxon = &ctx->staging; 913 914 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n"); 915 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon)); 916 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", 917 le16_to_cpu(rxon->channel)); 918 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", 919 le32_to_cpu(rxon->flags)); 920 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n", 921 le32_to_cpu(rxon->filter_flags)); 922 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type); 923 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n", 924 rxon->ofdm_basic_rates); 925 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", 926 rxon->cck_basic_rates); 927 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr); 928 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr); 929 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", 930 le16_to_cpu(rxon->assoc_id)); 931 } 932 #endif 933 934 static void iwl_calc_basic_rates(struct iwl_priv *priv, 935 struct iwl_rxon_context *ctx) 936 { 937 int lowest_present_ofdm = 100; 938 int lowest_present_cck = 100; 939 u8 cck = 0; 940 u8 ofdm = 0; 941 942 if (ctx->vif) { 943 struct ieee80211_supported_band *sband; 944 unsigned long basic = ctx->vif->bss_conf.basic_rates; 945 int i; 946 947 sband = priv->hw->wiphy->bands[priv->hw->conf.chandef.chan->band]; 948 949 for_each_set_bit(i, &basic, BITS_PER_LONG) { 950 int hw = sband->bitrates[i].hw_value; 951 if (hw >= IWL_FIRST_OFDM_RATE) { 952 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE); 953 if (lowest_present_ofdm > hw) 954 lowest_present_ofdm = hw; 955 } else { 956 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); 957 958 cck |= BIT(hw); 959 if (lowest_present_cck > hw) 960 lowest_present_cck = hw; 961 } 962 } 963 } 964 965 /* 966 * Now we've got the basic rates as bitmaps in the ofdm and cck 967 * variables. This isn't sufficient though, as there might not 968 * be all the right rates in the bitmap. E.g. if the only basic 969 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps 970 * and 6 Mbps because the 802.11-2007 standard says in 9.6: 971 * 972 * [...] a STA responding to a received frame shall transmit 973 * its Control Response frame [...] at the highest rate in the 974 * BSSBasicRateSet parameter that is less than or equal to the 975 * rate of the immediately previous frame in the frame exchange 976 * sequence ([...]) and that is of the same modulation class 977 * ([...]) as the received frame. If no rate contained in the 978 * BSSBasicRateSet parameter meets these conditions, then the 979 * control frame sent in response to a received frame shall be 980 * transmitted at the highest mandatory rate of the PHY that is 981 * less than or equal to the rate of the received frame, and 982 * that is of the same modulation class as the received frame. 983 * 984 * As a consequence, we need to add all mandatory rates that are 985 * lower than all of the basic rates to these bitmaps. 986 */ 987 988 if (IWL_RATE_24M_INDEX < lowest_present_ofdm) 989 ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE; 990 if (IWL_RATE_12M_INDEX < lowest_present_ofdm) 991 ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE; 992 /* 6M already there or needed so always add */ 993 ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE; 994 995 /* 996 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP. 997 * Note, however: 998 * - if no CCK rates are basic, it must be ERP since there must 999 * be some basic rates at all, so they're OFDM => ERP PHY 1000 * (or we're in 5 GHz, and the cck bitmap will never be used) 1001 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M 1002 * - if 5.5M is basic, 1M and 2M are mandatory 1003 * - if 2M is basic, 1M is mandatory 1004 * - if 1M is basic, that's the only valid ACK rate. 1005 * As a consequence, it's not as complicated as it sounds, just add 1006 * any lower rates to the ACK rate bitmap. 1007 */ 1008 if (IWL_RATE_11M_INDEX < lowest_present_cck) 1009 cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE; 1010 if (IWL_RATE_5M_INDEX < lowest_present_cck) 1011 cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE; 1012 if (IWL_RATE_2M_INDEX < lowest_present_cck) 1013 cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE; 1014 /* 1M already there or needed so always add */ 1015 cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE; 1016 1017 IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n", 1018 cck, ofdm); 1019 1020 /* "basic_rates" is a misnomer here -- should be called ACK rates */ 1021 ctx->staging.cck_basic_rates = cck; 1022 ctx->staging.ofdm_basic_rates = ofdm; 1023 } 1024 1025 /** 1026 * iwlagn_commit_rxon - commit staging_rxon to hardware 1027 * 1028 * The RXON command in staging_rxon is committed to the hardware and 1029 * the active_rxon structure is updated with the new data. This 1030 * function correctly transitions out of the RXON_ASSOC_MSK state if 1031 * a HW tune is required based on the RXON structure changes. 1032 * 1033 * The connect/disconnect flow should be as the following: 1034 * 1035 * 1. make sure send RXON command with association bit unset if not connect 1036 * this should include the channel and the band for the candidate 1037 * to be connected to 1038 * 2. Add Station before RXON association with the AP 1039 * 3. RXON_timing has to send before RXON for connection 1040 * 4. full RXON command - associated bit set 1041 * 5. use RXON_ASSOC command to update any flags changes 1042 */ 1043 int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1044 { 1045 /* cast away the const for active_rxon in this function */ 1046 struct iwl_rxon_cmd *active = (void *)&ctx->active; 1047 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK); 1048 int ret; 1049 1050 lockdep_assert_held(&priv->mutex); 1051 1052 if (!iwl_is_alive(priv)) 1053 return -EBUSY; 1054 1055 /* This function hardcodes a bunch of dual-mode assumptions */ 1056 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 1057 1058 if (!ctx->is_active) 1059 return 0; 1060 1061 /* always get timestamp with Rx frame */ 1062 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK; 1063 1064 /* recalculate basic rates */ 1065 iwl_calc_basic_rates(priv, ctx); 1066 1067 /* 1068 * force CTS-to-self frames protection if RTS-CTS is not preferred 1069 * one aggregation protection method 1070 */ 1071 if (!priv->hw_params.use_rts_for_aggregation) 1072 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN; 1073 1074 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) || 1075 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK)) 1076 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; 1077 else 1078 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK; 1079 1080 iwl_print_rx_config_cmd(priv, ctx->ctxid); 1081 ret = iwl_check_rxon_cmd(priv, ctx); 1082 if (ret) { 1083 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n"); 1084 return -EINVAL; 1085 } 1086 1087 /* 1088 * receive commit_rxon request 1089 * abort any previous channel switch if still in process 1090 */ 1091 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) && 1092 (priv->switch_channel != ctx->staging.channel)) { 1093 IWL_DEBUG_11H(priv, "abort channel switch on %d\n", 1094 le16_to_cpu(priv->switch_channel)); 1095 iwl_chswitch_done(priv, false); 1096 } 1097 1098 /* 1099 * If we don't need to send a full RXON, we can use 1100 * iwl_rxon_assoc_cmd which is used to reconfigure filter 1101 * and other flags for the current radio configuration. 1102 */ 1103 if (!iwl_full_rxon_required(priv, ctx)) { 1104 ret = iwlagn_send_rxon_assoc(priv, ctx); 1105 if (ret) { 1106 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret); 1107 return ret; 1108 } 1109 1110 memcpy(active, &ctx->staging, sizeof(*active)); 1111 /* 1112 * We do not commit tx power settings while channel changing, 1113 * do it now if after settings changed. 1114 */ 1115 iwl_set_tx_power(priv, priv->tx_power_next, false); 1116 1117 /* make sure we are in the right PS state */ 1118 iwl_power_update_mode(priv, true); 1119 1120 return 0; 1121 } 1122 1123 iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.sw_crypto); 1124 1125 IWL_DEBUG_INFO(priv, 1126 "Going to commit RXON\n" 1127 " * with%s RXON_FILTER_ASSOC_MSK\n" 1128 " * channel = %d\n" 1129 " * bssid = %pM\n", 1130 (new_assoc ? "" : "out"), 1131 le16_to_cpu(ctx->staging.channel), 1132 ctx->staging.bssid_addr); 1133 1134 /* 1135 * Always clear associated first, but with the correct config. 1136 * This is required as for example station addition for the 1137 * AP station must be done after the BSSID is set to correctly 1138 * set up filters in the device. 1139 */ 1140 ret = iwlagn_rxon_disconn(priv, ctx); 1141 if (ret) 1142 return ret; 1143 1144 ret = iwlagn_set_pan_params(priv); 1145 if (ret) 1146 return ret; 1147 1148 if (new_assoc) 1149 return iwlagn_rxon_connect(priv, ctx); 1150 1151 return 0; 1152 } 1153 1154 void iwlagn_config_ht40(struct ieee80211_conf *conf, 1155 struct iwl_rxon_context *ctx) 1156 { 1157 if (conf_is_ht40_minus(conf)) { 1158 ctx->ht.extension_chan_offset = 1159 IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1160 ctx->ht.is_40mhz = true; 1161 } else if (conf_is_ht40_plus(conf)) { 1162 ctx->ht.extension_chan_offset = 1163 IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1164 ctx->ht.is_40mhz = true; 1165 } else { 1166 ctx->ht.extension_chan_offset = 1167 IEEE80211_HT_PARAM_CHA_SEC_NONE; 1168 ctx->ht.is_40mhz = false; 1169 } 1170 } 1171 1172 int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed) 1173 { 1174 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1175 struct iwl_rxon_context *ctx; 1176 struct ieee80211_conf *conf = &hw->conf; 1177 struct ieee80211_channel *channel = conf->chandef.chan; 1178 int ret = 0; 1179 1180 IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed); 1181 1182 mutex_lock(&priv->mutex); 1183 1184 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) { 1185 IWL_DEBUG_MAC80211(priv, "leave - scanning\n"); 1186 goto out; 1187 } 1188 1189 if (!iwl_is_ready(priv)) { 1190 IWL_DEBUG_MAC80211(priv, "leave - not ready\n"); 1191 goto out; 1192 } 1193 1194 if (changed & (IEEE80211_CONF_CHANGE_SMPS | 1195 IEEE80211_CONF_CHANGE_CHANNEL)) { 1196 /* mac80211 uses static for non-HT which is what we want */ 1197 priv->current_ht_config.smps = conf->smps_mode; 1198 1199 /* 1200 * Recalculate chain counts. 1201 * 1202 * If monitor mode is enabled then mac80211 will 1203 * set up the SM PS mode to OFF if an HT channel is 1204 * configured. 1205 */ 1206 for_each_context(priv, ctx) 1207 iwlagn_set_rxon_chain(priv, ctx); 1208 } 1209 1210 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { 1211 for_each_context(priv, ctx) { 1212 /* Configure HT40 channels */ 1213 if (ctx->ht.enabled != conf_is_ht(conf)) 1214 ctx->ht.enabled = conf_is_ht(conf); 1215 1216 if (ctx->ht.enabled) { 1217 /* if HT40 is used, it should not change 1218 * after associated except channel switch */ 1219 if (!ctx->ht.is_40mhz || 1220 !iwl_is_associated_ctx(ctx)) 1221 iwlagn_config_ht40(conf, ctx); 1222 } else 1223 ctx->ht.is_40mhz = false; 1224 1225 /* 1226 * Default to no protection. Protection mode will 1227 * later be set from BSS config in iwl_ht_conf 1228 */ 1229 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE; 1230 1231 /* if we are switching from ht to 2.4 clear flags 1232 * from any ht related info since 2.4 does not 1233 * support ht */ 1234 if (le16_to_cpu(ctx->staging.channel) != 1235 channel->hw_value) 1236 ctx->staging.flags = 0; 1237 1238 iwl_set_rxon_channel(priv, channel, ctx); 1239 iwl_set_rxon_ht(priv, &priv->current_ht_config); 1240 1241 iwl_set_flags_for_band(priv, ctx, channel->band, 1242 ctx->vif); 1243 } 1244 1245 iwl_update_bcast_stations(priv); 1246 } 1247 1248 if (changed & (IEEE80211_CONF_CHANGE_PS | 1249 IEEE80211_CONF_CHANGE_IDLE)) { 1250 ret = iwl_power_update_mode(priv, false); 1251 if (ret) 1252 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n"); 1253 } 1254 1255 if (changed & IEEE80211_CONF_CHANGE_POWER) { 1256 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n", 1257 priv->tx_power_user_lmt, conf->power_level); 1258 1259 iwl_set_tx_power(priv, conf->power_level, false); 1260 } 1261 1262 for_each_context(priv, ctx) { 1263 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging))) 1264 continue; 1265 iwlagn_commit_rxon(priv, ctx); 1266 } 1267 out: 1268 mutex_unlock(&priv->mutex); 1269 IWL_DEBUG_MAC80211(priv, "leave\n"); 1270 1271 return ret; 1272 } 1273 1274 static void iwlagn_check_needed_chains(struct iwl_priv *priv, 1275 struct iwl_rxon_context *ctx, 1276 struct ieee80211_bss_conf *bss_conf) 1277 { 1278 struct ieee80211_vif *vif = ctx->vif; 1279 struct iwl_rxon_context *tmp; 1280 struct ieee80211_sta *sta; 1281 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 1282 struct ieee80211_sta_ht_cap *ht_cap; 1283 bool need_multiple; 1284 1285 lockdep_assert_held(&priv->mutex); 1286 1287 switch (vif->type) { 1288 case NL80211_IFTYPE_STATION: 1289 rcu_read_lock(); 1290 sta = ieee80211_find_sta(vif, bss_conf->bssid); 1291 if (!sta) { 1292 /* 1293 * If at all, this can only happen through a race 1294 * when the AP disconnects us while we're still 1295 * setting up the connection, in that case mac80211 1296 * will soon tell us about that. 1297 */ 1298 need_multiple = false; 1299 rcu_read_unlock(); 1300 break; 1301 } 1302 1303 ht_cap = &sta->ht_cap; 1304 1305 need_multiple = true; 1306 1307 /* 1308 * If the peer advertises no support for receiving 2 and 3 1309 * stream MCS rates, it can't be transmitting them either. 1310 */ 1311 if (ht_cap->mcs.rx_mask[1] == 0 && 1312 ht_cap->mcs.rx_mask[2] == 0) { 1313 need_multiple = false; 1314 } else if (!(ht_cap->mcs.tx_params & 1315 IEEE80211_HT_MCS_TX_DEFINED)) { 1316 /* If it can't TX MCS at all ... */ 1317 need_multiple = false; 1318 } else if (ht_cap->mcs.tx_params & 1319 IEEE80211_HT_MCS_TX_RX_DIFF) { 1320 int maxstreams; 1321 1322 /* 1323 * But if it can receive them, it might still not 1324 * be able to transmit them, which is what we need 1325 * to check here -- so check the number of streams 1326 * it advertises for TX (if different from RX). 1327 */ 1328 1329 maxstreams = (ht_cap->mcs.tx_params & 1330 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK); 1331 maxstreams >>= 1332 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; 1333 maxstreams += 1; 1334 1335 if (maxstreams <= 1) 1336 need_multiple = false; 1337 } 1338 1339 rcu_read_unlock(); 1340 break; 1341 case NL80211_IFTYPE_ADHOC: 1342 /* currently */ 1343 need_multiple = false; 1344 break; 1345 default: 1346 /* only AP really */ 1347 need_multiple = true; 1348 break; 1349 } 1350 1351 ctx->ht_need_multiple_chains = need_multiple; 1352 1353 if (!need_multiple) { 1354 /* check all contexts */ 1355 for_each_context(priv, tmp) { 1356 if (!tmp->vif) 1357 continue; 1358 if (tmp->ht_need_multiple_chains) { 1359 need_multiple = true; 1360 break; 1361 } 1362 } 1363 } 1364 1365 ht_conf->single_chain_sufficient = !need_multiple; 1366 } 1367 1368 static void iwlagn_chain_noise_reset(struct iwl_priv *priv) 1369 { 1370 struct iwl_chain_noise_data *data = &priv->chain_noise_data; 1371 int ret; 1372 1373 if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED) 1374 return; 1375 1376 if ((data->state == IWL_CHAIN_NOISE_ALIVE) && 1377 iwl_is_any_associated(priv)) { 1378 struct iwl_calib_chain_noise_reset_cmd cmd; 1379 1380 /* clear data for chain noise calibration algorithm */ 1381 data->chain_noise_a = 0; 1382 data->chain_noise_b = 0; 1383 data->chain_noise_c = 0; 1384 data->chain_signal_a = 0; 1385 data->chain_signal_b = 0; 1386 data->chain_signal_c = 0; 1387 data->beacon_count = 0; 1388 1389 memset(&cmd, 0, sizeof(cmd)); 1390 iwl_set_calib_hdr(&cmd.hdr, 1391 priv->phy_calib_chain_noise_reset_cmd); 1392 ret = iwl_dvm_send_cmd_pdu(priv, 1393 REPLY_PHY_CALIBRATION_CMD, 1394 0, sizeof(cmd), &cmd); 1395 if (ret) 1396 IWL_ERR(priv, 1397 "Could not send REPLY_PHY_CALIBRATION_CMD\n"); 1398 data->state = IWL_CHAIN_NOISE_ACCUMULATE; 1399 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n"); 1400 } 1401 } 1402 1403 void iwlagn_bss_info_changed(struct ieee80211_hw *hw, 1404 struct ieee80211_vif *vif, 1405 struct ieee80211_bss_conf *bss_conf, 1406 u32 changes) 1407 { 1408 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1409 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1410 int ret; 1411 bool force = false; 1412 1413 mutex_lock(&priv->mutex); 1414 1415 if (changes & BSS_CHANGED_IDLE && bss_conf->idle) { 1416 /* 1417 * If we go idle, then clearly no "passive-no-rx" 1418 * workaround is needed any more, this is a reset. 1419 */ 1420 iwlagn_lift_passive_no_rx(priv); 1421 } 1422 1423 if (unlikely(!iwl_is_ready(priv))) { 1424 IWL_DEBUG_MAC80211(priv, "leave - not ready\n"); 1425 mutex_unlock(&priv->mutex); 1426 return; 1427 } 1428 1429 if (unlikely(!ctx->vif)) { 1430 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n"); 1431 mutex_unlock(&priv->mutex); 1432 return; 1433 } 1434 1435 if (changes & BSS_CHANGED_BEACON_INT) 1436 force = true; 1437 1438 if (changes & BSS_CHANGED_QOS) { 1439 ctx->qos_data.qos_active = bss_conf->qos; 1440 iwlagn_update_qos(priv, ctx); 1441 } 1442 1443 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid); 1444 if (vif->bss_conf.use_short_preamble) 1445 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; 1446 else 1447 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; 1448 1449 if (changes & BSS_CHANGED_ASSOC) { 1450 if (bss_conf->assoc) { 1451 priv->timestamp = bss_conf->sync_tsf; 1452 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; 1453 } else { 1454 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; 1455 1456 if (ctx->ctxid == IWL_RXON_CTX_BSS) 1457 priv->have_rekey_data = false; 1458 } 1459 1460 iwlagn_bt_coex_rssi_monitor(priv); 1461 } 1462 1463 if (ctx->ht.enabled) { 1464 ctx->ht.protection = bss_conf->ht_operation_mode & 1465 IEEE80211_HT_OP_MODE_PROTECTION; 1466 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode & 1467 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT); 1468 iwlagn_check_needed_chains(priv, ctx, bss_conf); 1469 iwl_set_rxon_ht(priv, &priv->current_ht_config); 1470 } 1471 1472 iwlagn_set_rxon_chain(priv, ctx); 1473 1474 if (bss_conf->use_cts_prot && (priv->band != NL80211_BAND_5GHZ)) 1475 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK; 1476 else 1477 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK; 1478 1479 if (bss_conf->use_cts_prot) 1480 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN; 1481 else 1482 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN; 1483 1484 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN); 1485 1486 if (vif->type == NL80211_IFTYPE_AP || 1487 vif->type == NL80211_IFTYPE_ADHOC) { 1488 if (vif->bss_conf.enable_beacon) { 1489 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; 1490 priv->beacon_ctx = ctx; 1491 } else { 1492 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; 1493 priv->beacon_ctx = NULL; 1494 } 1495 } 1496 1497 /* 1498 * If the ucode decides to do beacon filtering before 1499 * association, it will lose beacons that are needed 1500 * before sending frames out on passive channels. This 1501 * causes association failures on those channels. Enable 1502 * receiving beacons in such cases. 1503 */ 1504 1505 if (vif->type == NL80211_IFTYPE_STATION) { 1506 if (!bss_conf->assoc) 1507 ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK; 1508 else 1509 ctx->staging.filter_flags &= 1510 ~RXON_FILTER_BCON_AWARE_MSK; 1511 } 1512 1513 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging))) 1514 iwlagn_commit_rxon(priv, ctx); 1515 1516 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) { 1517 /* 1518 * The chain noise calibration will enable PM upon 1519 * completion. If calibration has already been run 1520 * then we need to enable power management here. 1521 */ 1522 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE) 1523 iwl_power_update_mode(priv, false); 1524 1525 /* Enable RX differential gain and sensitivity calibrations */ 1526 iwlagn_chain_noise_reset(priv); 1527 priv->start_calib = 1; 1528 } 1529 1530 if (changes & BSS_CHANGED_IBSS) { 1531 ret = iwlagn_manage_ibss_station(priv, vif, 1532 bss_conf->ibss_joined); 1533 if (ret) 1534 IWL_ERR(priv, "failed to %s IBSS station %pM\n", 1535 bss_conf->ibss_joined ? "add" : "remove", 1536 bss_conf->bssid); 1537 } 1538 1539 if (changes & BSS_CHANGED_BEACON && priv->beacon_ctx == ctx) { 1540 if (iwlagn_update_beacon(priv, vif)) 1541 IWL_ERR(priv, "Error updating beacon\n"); 1542 } 1543 1544 mutex_unlock(&priv->mutex); 1545 } 1546 1547 void iwlagn_post_scan(struct iwl_priv *priv) 1548 { 1549 struct iwl_rxon_context *ctx; 1550 1551 /* 1552 * We do not commit power settings while scan is pending, 1553 * do it now if the settings changed. 1554 */ 1555 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false); 1556 iwl_set_tx_power(priv, priv->tx_power_next, false); 1557 1558 /* 1559 * Since setting the RXON may have been deferred while 1560 * performing the scan, fire one off if needed 1561 */ 1562 for_each_context(priv, ctx) 1563 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging))) 1564 iwlagn_commit_rxon(priv, ctx); 1565 1566 iwlagn_set_pan_params(priv); 1567 } 1568