1548 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/******************************************************************************3 *4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.5 * Copyright(c) 2015 Intel Deutschland GmbH6 *****************************************************************************/7 8#include <linux/etherdevice.h>9#include "iwl-trans.h"10#include "iwl-modparams.h"11#include "dev.h"12#include "agn.h"13#include "calib.h"14 15/*16 * initialize rxon structure with default values from eeprom17 */18void iwl_connection_init_rx_config(struct iwl_priv *priv,19 struct iwl_rxon_context *ctx)20{21 memset(&ctx->staging, 0, sizeof(ctx->staging));22 23 if (!ctx->vif) {24 ctx->staging.dev_type = ctx->unused_devtype;25 } else26 switch (ctx->vif->type) {27 case NL80211_IFTYPE_AP:28 ctx->staging.dev_type = ctx->ap_devtype;29 break;30 31 case NL80211_IFTYPE_STATION:32 ctx->staging.dev_type = ctx->station_devtype;33 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;34 break;35 36 case NL80211_IFTYPE_ADHOC:37 ctx->staging.dev_type = ctx->ibss_devtype;38 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;39 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |40 RXON_FILTER_ACCEPT_GRP_MSK;41 break;42 43 case NL80211_IFTYPE_MONITOR:44 ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;45 break;46 47 default:48 IWL_ERR(priv, "Unsupported interface type %d\n",49 ctx->vif->type);50 break;51 }52 53#if 054 /* TODO: Figure out when short_preamble would be set and cache from55 * that */56 if (!hw_to_local(priv->hw)->short_preamble)57 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;58 else59 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;60#endif61 62 ctx->staging.channel =63 cpu_to_le16(priv->hw->conf.chandef.chan->hw_value);64 priv->band = priv->hw->conf.chandef.chan->band;65 66 iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);67 68 /* clear both MIX and PURE40 mode flag */69 ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |70 RXON_FLG_CHANNEL_MODE_PURE_40);71 if (ctx->vif)72 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);73 74 ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;75 ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;76 ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;77}78 79static int iwlagn_disable_bss(struct iwl_priv *priv,80 struct iwl_rxon_context *ctx,81 struct iwl_rxon_cmd *send)82{83 __le32 old_filter = send->filter_flags;84 int ret;85 86 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;87 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,88 0, sizeof(*send), send);89 90 send->filter_flags = old_filter;91 92 if (ret)93 IWL_DEBUG_QUIET_RFKILL(priv,94 "Error clearing ASSOC_MSK on BSS (%d)\n", ret);95 96 return ret;97}98 99static int iwlagn_disable_pan(struct iwl_priv *priv,100 struct iwl_rxon_context *ctx,101 struct iwl_rxon_cmd *send)102{103 struct iwl_notification_wait disable_wait;104 __le32 old_filter = send->filter_flags;105 u8 old_dev_type = send->dev_type;106 int ret;107 static const u16 deactivate_cmd[] = {108 REPLY_WIPAN_DEACTIVATION_COMPLETE109 };110 111 iwl_init_notification_wait(&priv->notif_wait, &disable_wait,112 deactivate_cmd, ARRAY_SIZE(deactivate_cmd),113 NULL, NULL);114 115 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;116 send->dev_type = RXON_DEV_TYPE_P2P;117 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd,118 0, sizeof(*send), send);119 120 send->filter_flags = old_filter;121 send->dev_type = old_dev_type;122 123 if (ret) {124 IWL_ERR(priv, "Error disabling PAN (%d)\n", ret);125 iwl_remove_notification(&priv->notif_wait, &disable_wait);126 } else {127 ret = iwl_wait_notification(&priv->notif_wait,128 &disable_wait, HZ);129 if (ret)130 IWL_ERR(priv, "Timed out waiting for PAN disable\n");131 }132 133 return ret;134}135 136static int iwlagn_disconn_pan(struct iwl_priv *priv,137 struct iwl_rxon_context *ctx,138 struct iwl_rxon_cmd *send)139{140 __le32 old_filter = send->filter_flags;141 int ret;142 143 send->filter_flags &= ~RXON_FILTER_ASSOC_MSK;144 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,145 sizeof(*send), send);146 147 send->filter_flags = old_filter;148 149 return ret;150}151 152static void iwlagn_update_qos(struct iwl_priv *priv,153 struct iwl_rxon_context *ctx)154{155 int ret;156 157 if (!ctx->is_active)158 return;159 160 ctx->qos_data.def_qos_parm.qos_flags = 0;161 162 if (ctx->qos_data.qos_active)163 ctx->qos_data.def_qos_parm.qos_flags |=164 QOS_PARAM_FLG_UPDATE_EDCA_MSK;165 166 if (ctx->ht.enabled)167 ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;168 169 IWL_DEBUG_INFO(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",170 ctx->qos_data.qos_active,171 ctx->qos_data.def_qos_parm.qos_flags);172 173 ret = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, 0,174 sizeof(struct iwl_qosparam_cmd),175 &ctx->qos_data.def_qos_parm);176 if (ret)177 IWL_DEBUG_QUIET_RFKILL(priv, "Failed to update QoS\n");178}179 180static int iwlagn_update_beacon(struct iwl_priv *priv,181 struct ieee80211_vif *vif)182{183 lockdep_assert_held(&priv->mutex);184 185 dev_kfree_skb(priv->beacon_skb);186 priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif, 0);187 if (!priv->beacon_skb)188 return -ENOMEM;189 return iwlagn_send_beacon_cmd(priv);190}191 192static int iwlagn_send_rxon_assoc(struct iwl_priv *priv,193 struct iwl_rxon_context *ctx)194{195 int ret = 0;196 struct iwl_rxon_assoc_cmd rxon_assoc;197 const struct iwl_rxon_cmd *rxon1 = &ctx->staging;198 const struct iwl_rxon_cmd *rxon2 = &ctx->active;199 200 if ((rxon1->flags == rxon2->flags) &&201 (rxon1->filter_flags == rxon2->filter_flags) &&202 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&203 (rxon1->ofdm_ht_single_stream_basic_rates ==204 rxon2->ofdm_ht_single_stream_basic_rates) &&205 (rxon1->ofdm_ht_dual_stream_basic_rates ==206 rxon2->ofdm_ht_dual_stream_basic_rates) &&207 (rxon1->ofdm_ht_triple_stream_basic_rates ==208 rxon2->ofdm_ht_triple_stream_basic_rates) &&209 (rxon1->acquisition_data == rxon2->acquisition_data) &&210 (rxon1->rx_chain == rxon2->rx_chain) &&211 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {212 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");213 return 0;214 }215 216 rxon_assoc.flags = ctx->staging.flags;217 rxon_assoc.filter_flags = ctx->staging.filter_flags;218 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;219 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;220 rxon_assoc.reserved1 = 0;221 rxon_assoc.reserved2 = 0;222 rxon_assoc.reserved3 = 0;223 rxon_assoc.ofdm_ht_single_stream_basic_rates =224 ctx->staging.ofdm_ht_single_stream_basic_rates;225 rxon_assoc.ofdm_ht_dual_stream_basic_rates =226 ctx->staging.ofdm_ht_dual_stream_basic_rates;227 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;228 rxon_assoc.ofdm_ht_triple_stream_basic_rates =229 ctx->staging.ofdm_ht_triple_stream_basic_rates;230 rxon_assoc.acquisition_data = ctx->staging.acquisition_data;231 232 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_assoc_cmd,233 CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc);234 return ret;235}236 237static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)238{239 u16 new_val;240 u16 beacon_factor;241 242 /*243 * If mac80211 hasn't given us a beacon interval, program244 * the default into the device (not checking this here245 * would cause the adjustment below to return the maximum246 * value, which may break PAN.)247 */248 if (!beacon_val)249 return DEFAULT_BEACON_INTERVAL;250 251 /*252 * If the beacon interval we obtained from the peer253 * is too large, we'll have to wake up more often254 * (and in IBSS case, we'll beacon too much)255 *256 * For example, if max_beacon_val is 4096, and the257 * requested beacon interval is 7000, we'll have to258 * use 3500 to be able to wake up on the beacons.259 *260 * This could badly influence beacon detection stats.261 */262 263 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;264 new_val = beacon_val / beacon_factor;265 266 if (!new_val)267 new_val = max_beacon_val;268 269 return new_val;270}271 272static int iwl_send_rxon_timing(struct iwl_priv *priv,273 struct iwl_rxon_context *ctx)274{275 u64 tsf;276 s32 interval_tm, rem;277 struct ieee80211_conf *conf = NULL;278 u16 beacon_int;279 struct ieee80211_vif *vif = ctx->vif;280 281 conf = &priv->hw->conf;282 283 lockdep_assert_held(&priv->mutex);284 285 memset(&ctx->timing, 0, sizeof(struct iwl_rxon_time_cmd));286 287 ctx->timing.timestamp = cpu_to_le64(priv->timestamp);288 ctx->timing.listen_interval = cpu_to_le16(conf->listen_interval);289 290 beacon_int = vif ? vif->bss_conf.beacon_int : 0;291 292 /*293 * TODO: For IBSS we need to get atim_window from mac80211,294 * for now just always use 0295 */296 ctx->timing.atim_window = 0;297 298 if (ctx->ctxid == IWL_RXON_CTX_PAN &&299 (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION) &&300 iwl_is_associated(priv, IWL_RXON_CTX_BSS) &&301 priv->contexts[IWL_RXON_CTX_BSS].vif &&302 priv->contexts[IWL_RXON_CTX_BSS].vif->bss_conf.beacon_int) {303 ctx->timing.beacon_interval =304 priv->contexts[IWL_RXON_CTX_BSS].timing.beacon_interval;305 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);306 } else if (ctx->ctxid == IWL_RXON_CTX_BSS &&307 iwl_is_associated(priv, IWL_RXON_CTX_PAN) &&308 priv->contexts[IWL_RXON_CTX_PAN].vif &&309 priv->contexts[IWL_RXON_CTX_PAN].vif->bss_conf.beacon_int &&310 (!iwl_is_associated_ctx(ctx) || !ctx->vif ||311 !ctx->vif->bss_conf.beacon_int)) {312 ctx->timing.beacon_interval =313 priv->contexts[IWL_RXON_CTX_PAN].timing.beacon_interval;314 beacon_int = le16_to_cpu(ctx->timing.beacon_interval);315 } else {316 beacon_int = iwl_adjust_beacon_interval(beacon_int,317 IWL_MAX_UCODE_BEACON_INTERVAL * TIME_UNIT);318 ctx->timing.beacon_interval = cpu_to_le16(beacon_int);319 }320 321 ctx->beacon_int = beacon_int;322 323 tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */324 interval_tm = beacon_int * TIME_UNIT;325 rem = do_div(tsf, interval_tm);326 ctx->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);327 328 ctx->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ?: 1) : 1;329 330 IWL_DEBUG_ASSOC(priv,331 "beacon interval %d beacon timer %d beacon tim %d\n",332 le16_to_cpu(ctx->timing.beacon_interval),333 le32_to_cpu(ctx->timing.beacon_init_val),334 le16_to_cpu(ctx->timing.atim_window));335 336 return iwl_dvm_send_cmd_pdu(priv, ctx->rxon_timing_cmd,337 0, sizeof(ctx->timing), &ctx->timing);338}339 340static int iwlagn_rxon_disconn(struct iwl_priv *priv,341 struct iwl_rxon_context *ctx)342{343 int ret;344 struct iwl_rxon_cmd *active = (void *)&ctx->active;345 346 if (ctx->ctxid == IWL_RXON_CTX_BSS) {347 ret = iwlagn_disable_bss(priv, ctx, &ctx->staging);348 } else {349 ret = iwlagn_disable_pan(priv, ctx, &ctx->staging);350 if (ret)351 return ret;352 if (ctx->vif) {353 ret = iwl_send_rxon_timing(priv, ctx);354 if (ret) {355 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);356 return ret;357 }358 ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging);359 }360 }361 if (ret)362 return ret;363 364 /*365 * Un-assoc RXON clears the station table and WEP366 * keys, so we have to restore those afterwards.367 */368 iwl_clear_ucode_stations(priv, ctx);369 /* update -- might need P2P now */370 iwl_update_bcast_station(priv, ctx);371 iwl_restore_stations(priv, ctx);372 ret = iwl_restore_default_wep_keys(priv, ctx);373 if (ret) {374 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);375 return ret;376 }377 378 memcpy(active, &ctx->staging, sizeof(*active));379 return 0;380}381 382static int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)383{384 int ret;385 s8 prev_tx_power;386 bool defer;387 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];388 389 if (priv->calib_disabled & IWL_TX_POWER_CALIB_DISABLED)390 return 0;391 392 lockdep_assert_held(&priv->mutex);393 394 if (priv->tx_power_user_lmt == tx_power && !force)395 return 0;396 397 if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {398 IWL_WARN(priv,399 "Requested user TXPOWER %d below lower limit %d.\n",400 tx_power,401 IWLAGN_TX_POWER_TARGET_POWER_MIN);402 return -EINVAL;403 }404 405 if (tx_power > DIV_ROUND_UP(priv->nvm_data->max_tx_pwr_half_dbm, 2)) {406 IWL_WARN(priv,407 "Requested user TXPOWER %d above upper limit %d.\n",408 tx_power, priv->nvm_data->max_tx_pwr_half_dbm);409 return -EINVAL;410 }411 412 if (!iwl_is_ready_rf(priv))413 return -EIO;414 415 /* scan complete and commit_rxon use tx_power_next value,416 * it always need to be updated for newest request */417 priv->tx_power_next = tx_power;418 419 /* do not set tx power when scanning or channel changing */420 defer = test_bit(STATUS_SCANNING, &priv->status) ||421 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));422 if (defer && !force) {423 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");424 return 0;425 }426 427 prev_tx_power = priv->tx_power_user_lmt;428 priv->tx_power_user_lmt = tx_power;429 430 ret = iwlagn_send_tx_power(priv);431 432 /* if fail to set tx_power, restore the orig. tx power */433 if (ret) {434 priv->tx_power_user_lmt = prev_tx_power;435 priv->tx_power_next = prev_tx_power;436 }437 return ret;438}439 440static int iwlagn_rxon_connect(struct iwl_priv *priv,441 struct iwl_rxon_context *ctx)442{443 int ret;444 struct iwl_rxon_cmd *active = (void *)&ctx->active;445 446 /* RXON timing must be before associated RXON */447 if (ctx->ctxid == IWL_RXON_CTX_BSS) {448 ret = iwl_send_rxon_timing(priv, ctx);449 if (ret) {450 IWL_ERR(priv, "Failed to send timing (%d)!\n", ret);451 return ret;452 }453 }454 /* QoS info may be cleared by previous un-assoc RXON */455 iwlagn_update_qos(priv, ctx);456 457 /*458 * We'll run into this code path when beaconing is459 * enabled, but then we also need to send the beacon460 * to the device.461 */462 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) {463 ret = iwlagn_update_beacon(priv, ctx->vif);464 if (ret) {465 IWL_ERR(priv,466 "Error sending required beacon (%d)!\n",467 ret);468 return ret;469 }470 }471 472 priv->start_calib = 0;473 /*474 * Apply the new configuration.475 *476 * Associated RXON doesn't clear the station table in uCode,477 * so we don't need to restore stations etc. after this.478 */479 ret = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, 0,480 sizeof(struct iwl_rxon_cmd), &ctx->staging);481 if (ret) {482 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);483 return ret;484 }485 memcpy(active, &ctx->staging, sizeof(*active));486 487 /* IBSS beacon needs to be sent after setting assoc */488 if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC))489 if (iwlagn_update_beacon(priv, ctx->vif))490 IWL_ERR(priv, "Error sending IBSS beacon\n");491 iwl_init_sensitivity(priv);492 493 /*494 * If we issue a new RXON command which required a tune then495 * we must send a new TXPOWER command or we won't be able to496 * Tx any frames.497 *498 * It's expected we set power here if channel is changing.499 */500 ret = iwl_set_tx_power(priv, priv->tx_power_next, true);501 if (ret) {502 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);503 return ret;504 }505 506 return 0;507}508 509int iwlagn_set_pan_params(struct iwl_priv *priv)510{511 struct iwl_wipan_params_cmd cmd;512 struct iwl_rxon_context *ctx_bss, *ctx_pan;513 int slot0 = 300, slot1 = 0;514 int ret;515 516 if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))517 return 0;518 519 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);520 521 lockdep_assert_held(&priv->mutex);522 523 ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];524 ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];525 526 /*527 * If the PAN context is inactive, then we don't need528 * to update the PAN parameters, the last thing we'll529 * have done before it goes inactive is making the PAN530 * parameters be WLAN-only.531 */532 if (!ctx_pan->is_active)533 return 0;534 535 memset(&cmd, 0, sizeof(cmd));536 537 /* only 2 slots are currently allowed */538 cmd.num_slots = 2;539 540 cmd.slots[0].type = 0; /* BSS */541 cmd.slots[1].type = 1; /* PAN */542 543 if (ctx_bss->vif && ctx_pan->vif) {544 int bcnint = ctx_pan->beacon_int;545 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;546 547 /* should be set, but seems unused?? */548 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);549 550 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&551 bcnint &&552 bcnint != ctx_bss->beacon_int) {553 IWL_ERR(priv,554 "beacon intervals don't match (%d, %d)\n",555 ctx_bss->beacon_int, ctx_pan->beacon_int);556 } else557 bcnint = max_t(int, bcnint,558 ctx_bss->beacon_int);559 if (!bcnint)560 bcnint = DEFAULT_BEACON_INTERVAL;561 slot0 = bcnint / 2;562 slot1 = bcnint - slot0;563 564 if (test_bit(STATUS_SCAN_HW, &priv->status) ||565 (!ctx_bss->vif->cfg.idle &&566 !ctx_bss->vif->cfg.assoc)) {567 slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;568 slot1 = IWL_MIN_SLOT_TIME;569 } else if (!ctx_pan->vif->cfg.idle &&570 !ctx_pan->vif->cfg.assoc) {571 slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;572 slot0 = IWL_MIN_SLOT_TIME;573 }574 } else if (ctx_pan->vif) {575 slot0 = 0;576 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *577 ctx_pan->beacon_int;578 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);579 580 if (test_bit(STATUS_SCAN_HW, &priv->status)) {581 slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;582 slot1 = IWL_MIN_SLOT_TIME;583 }584 }585 586 cmd.slots[0].width = cpu_to_le16(slot0);587 cmd.slots[1].width = cpu_to_le16(slot1);588 589 ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, 0,590 sizeof(cmd), &cmd);591 if (ret)592 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);593 594 return ret;595}596 597static void _iwl_set_rxon_ht(struct iwl_priv *priv,598 struct iwl_ht_config *ht_conf,599 struct iwl_rxon_context *ctx)600{601 struct iwl_rxon_cmd *rxon = &ctx->staging;602 603 if (!ctx->ht.enabled) {604 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |605 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |606 RXON_FLG_HT40_PROT_MSK |607 RXON_FLG_HT_PROT_MSK);608 return;609 }610 611 /* FIXME: if the definition of ht.protection changed, the "translation"612 * will be needed for rxon->flags613 */614 rxon->flags |= cpu_to_le32(ctx->ht.protection <<615 RXON_FLG_HT_OPERATING_MODE_POS);616 617 /* Set up channel bandwidth:618 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */619 /* clear the HT channel mode before set the mode */620 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |621 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);622 if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {623 /* pure ht40 */624 if (ctx->ht.protection ==625 IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {626 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;627 /*628 * Note: control channel is opposite of extension629 * channel630 */631 switch (ctx->ht.extension_chan_offset) {632 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:633 rxon->flags &=634 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;635 break;636 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:637 rxon->flags |=638 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;639 break;640 }641 } else {642 /*643 * Note: control channel is opposite of extension644 * channel645 */646 switch (ctx->ht.extension_chan_offset) {647 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:648 rxon->flags &=649 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);650 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;651 break;652 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:653 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;654 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;655 break;656 case IEEE80211_HT_PARAM_CHA_SEC_NONE:657 default:658 /*659 * channel location only valid if in Mixed660 * mode661 */662 IWL_ERR(priv,663 "invalid extension channel offset\n");664 break;665 }666 }667 } else {668 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;669 }670 671 iwlagn_set_rxon_chain(priv, ctx);672 673 IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "674 "extension channel offset 0x%x\n",675 le32_to_cpu(rxon->flags), ctx->ht.protection,676 ctx->ht.extension_chan_offset);677}678 679void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)680{681 struct iwl_rxon_context *ctx;682 683 for_each_context(priv, ctx)684 _iwl_set_rxon_ht(priv, ht_conf, ctx);685}686 687/*688 * iwl_set_rxon_channel - Set the band and channel values in staging RXON689 * @ch: requested channel as a pointer to struct ieee80211_channel690 691 * NOTE: Does not commit to the hardware; it sets appropriate bit fields692 * in the staging RXON flag structure based on the ch->band693 */694void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,695 struct iwl_rxon_context *ctx)696{697 enum nl80211_band band = ch->band;698 u16 channel = ch->hw_value;699 700 if ((le16_to_cpu(ctx->staging.channel) == channel) &&701 (priv->band == band))702 return;703 704 ctx->staging.channel = cpu_to_le16(channel);705 if (band == NL80211_BAND_5GHZ)706 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;707 else708 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;709 710 priv->band = band;711 712 IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);713 714}715 716void iwl_set_flags_for_band(struct iwl_priv *priv,717 struct iwl_rxon_context *ctx,718 enum nl80211_band band,719 struct ieee80211_vif *vif)720{721 if (band == NL80211_BAND_5GHZ) {722 ctx->staging.flags &=723 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK724 | RXON_FLG_CCK_MSK);725 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;726 } else {727 /* Copied from iwl_post_associate() */728 if (vif && vif->bss_conf.use_short_slot)729 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;730 else731 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;732 733 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;734 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;735 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;736 }737}738 739static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv,740 struct iwl_rxon_context *ctx, int hw_decrypt)741{742 struct iwl_rxon_cmd *rxon = &ctx->staging;743 744 if (hw_decrypt)745 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;746 else747 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;748 749}750 751/* validate RXON structure is valid */752static int iwl_check_rxon_cmd(struct iwl_priv *priv,753 struct iwl_rxon_context *ctx)754{755 struct iwl_rxon_cmd *rxon = &ctx->staging;756 u32 errors = 0;757 758 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {759 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {760 IWL_WARN(priv, "check 2.4G: wrong narrow\n");761 errors |= BIT(0);762 }763 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {764 IWL_WARN(priv, "check 2.4G: wrong radar\n");765 errors |= BIT(1);766 }767 } else {768 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {769 IWL_WARN(priv, "check 5.2G: not short slot!\n");770 errors |= BIT(2);771 }772 if (rxon->flags & RXON_FLG_CCK_MSK) {773 IWL_WARN(priv, "check 5.2G: CCK!\n");774 errors |= BIT(3);775 }776 }777 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {778 IWL_WARN(priv, "mac/bssid mcast!\n");779 errors |= BIT(4);780 }781 782 /* make sure basic rates 6Mbps and 1Mbps are supported */783 if ((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0 &&784 (rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0) {785 IWL_WARN(priv, "neither 1 nor 6 are basic\n");786 errors |= BIT(5);787 }788 789 if (le16_to_cpu(rxon->assoc_id) > 2007) {790 IWL_WARN(priv, "aid > 2007\n");791 errors |= BIT(6);792 }793 794 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))795 == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {796 IWL_WARN(priv, "CCK and short slot\n");797 errors |= BIT(7);798 }799 800 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))801 == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {802 IWL_WARN(priv, "CCK and auto detect\n");803 errors |= BIT(8);804 }805 806 if ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |807 RXON_FLG_TGG_PROTECT_MSK)) ==808 RXON_FLG_TGG_PROTECT_MSK) {809 IWL_WARN(priv, "TGg but no auto-detect\n");810 errors |= BIT(9);811 }812 813 if (rxon->channel == 0) {814 IWL_WARN(priv, "zero channel is invalid\n");815 errors |= BIT(10);816 }817 818 WARN(errors, "Invalid RXON (%#x), channel %d",819 errors, le16_to_cpu(rxon->channel));820 821 return errors ? -EINVAL : 0;822}823 824/*825 * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed826 * @priv: staging_rxon is compared to active_rxon827 *828 * If the RXON structure is changing enough to require a new tune,829 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that830 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.831 */832static int iwl_full_rxon_required(struct iwl_priv *priv,833 struct iwl_rxon_context *ctx)834{835 const struct iwl_rxon_cmd *staging = &ctx->staging;836 const struct iwl_rxon_cmd *active = &ctx->active;837 838#define CHK(cond) \839 if ((cond)) { \840 IWL_DEBUG_INFO(priv, "need full RXON - " #cond "\n"); \841 return 1; \842 }843 844#define CHK_NEQ(c1, c2) \845 if ((c1) != (c2)) { \846 IWL_DEBUG_INFO(priv, "need full RXON - " \847 #c1 " != " #c2 " - %d != %d\n", \848 (c1), (c2)); \849 return 1; \850 }851 852 /* These items are only settable from the full RXON command */853 CHK(!iwl_is_associated_ctx(ctx));854 CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));855 CHK(!ether_addr_equal(staging->node_addr, active->node_addr));856 CHK(!ether_addr_equal(staging->wlap_bssid_addr,857 active->wlap_bssid_addr));858 CHK_NEQ(staging->dev_type, active->dev_type);859 CHK_NEQ(staging->channel, active->channel);860 CHK_NEQ(staging->air_propagation, active->air_propagation);861 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,862 active->ofdm_ht_single_stream_basic_rates);863 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,864 active->ofdm_ht_dual_stream_basic_rates);865 CHK_NEQ(staging->ofdm_ht_triple_stream_basic_rates,866 active->ofdm_ht_triple_stream_basic_rates);867 CHK_NEQ(staging->assoc_id, active->assoc_id);868 869 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can870 * be updated with the RXON_ASSOC command -- however only some871 * flag transitions are allowed using RXON_ASSOC */872 873 /* Check if we are not switching bands */874 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,875 active->flags & RXON_FLG_BAND_24G_MSK);876 877 /* Check if we are switching association toggle */878 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,879 active->filter_flags & RXON_FILTER_ASSOC_MSK);880 881#undef CHK882#undef CHK_NEQ883 884 return 0;885}886 887#ifdef CONFIG_IWLWIFI_DEBUG888void iwl_print_rx_config_cmd(struct iwl_priv *priv,889 enum iwl_rxon_context_id ctxid)890{891 struct iwl_rxon_context *ctx = &priv->contexts[ctxid];892 struct iwl_rxon_cmd *rxon = &ctx->staging;893 894 IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");895 iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));896 IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n",897 le16_to_cpu(rxon->channel));898 IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n",899 le32_to_cpu(rxon->flags));900 IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",901 le32_to_cpu(rxon->filter_flags));902 IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);903 IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",904 rxon->ofdm_basic_rates);905 IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n",906 rxon->cck_basic_rates);907 IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);908 IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);909 IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n",910 le16_to_cpu(rxon->assoc_id));911}912#endif913 914static void iwl_calc_basic_rates(struct iwl_priv *priv,915 struct iwl_rxon_context *ctx)916{917 int lowest_present_ofdm = 100;918 int lowest_present_cck = 100;919 u8 cck = 0;920 u8 ofdm = 0;921 922 if (ctx->vif) {923 struct ieee80211_supported_band *sband;924 unsigned long basic = ctx->vif->bss_conf.basic_rates;925 int i;926 927 sband = priv->hw->wiphy->bands[priv->hw->conf.chandef.chan->band];928 929 for_each_set_bit(i, &basic, BITS_PER_LONG) {930 int hw = sband->bitrates[i].hw_value;931 if (hw >= IWL_FIRST_OFDM_RATE) {932 ofdm |= BIT(hw - IWL_FIRST_OFDM_RATE);933 if (lowest_present_ofdm > hw)934 lowest_present_ofdm = hw;935 } else {936 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);937 938 cck |= BIT(hw);939 if (lowest_present_cck > hw)940 lowest_present_cck = hw;941 }942 }943 }944 945 /*946 * Now we've got the basic rates as bitmaps in the ofdm and cck947 * variables. This isn't sufficient though, as there might not948 * be all the right rates in the bitmap. E.g. if the only basic949 * rates are 5.5 Mbps and 11 Mbps, we still need to add 1 Mbps950 * and 6 Mbps because the 802.11-2007 standard says in 9.6:951 *952 * [...] a STA responding to a received frame shall transmit953 * its Control Response frame [...] at the highest rate in the954 * BSSBasicRateSet parameter that is less than or equal to the955 * rate of the immediately previous frame in the frame exchange956 * sequence ([...]) and that is of the same modulation class957 * ([...]) as the received frame. If no rate contained in the958 * BSSBasicRateSet parameter meets these conditions, then the959 * control frame sent in response to a received frame shall be960 * transmitted at the highest mandatory rate of the PHY that is961 * less than or equal to the rate of the received frame, and962 * that is of the same modulation class as the received frame.963 *964 * As a consequence, we need to add all mandatory rates that are965 * lower than all of the basic rates to these bitmaps.966 */967 968 if (IWL_RATE_24M_INDEX < lowest_present_ofdm)969 ofdm |= IWL_RATE_24M_MASK >> IWL_FIRST_OFDM_RATE;970 if (IWL_RATE_12M_INDEX < lowest_present_ofdm)971 ofdm |= IWL_RATE_12M_MASK >> IWL_FIRST_OFDM_RATE;972 /* 6M already there or needed so always add */973 ofdm |= IWL_RATE_6M_MASK >> IWL_FIRST_OFDM_RATE;974 975 /*976 * CCK is a bit more complex with DSSS vs. HR/DSSS vs. ERP.977 * Note, however:978 * - if no CCK rates are basic, it must be ERP since there must979 * be some basic rates at all, so they're OFDM => ERP PHY980 * (or we're in 5 GHz, and the cck bitmap will never be used)981 * - if 11M is a basic rate, it must be ERP as well, so add 5.5M982 * - if 5.5M is basic, 1M and 2M are mandatory983 * - if 2M is basic, 1M is mandatory984 * - if 1M is basic, that's the only valid ACK rate.985 * As a consequence, it's not as complicated as it sounds, just add986 * any lower rates to the ACK rate bitmap.987 */988 if (IWL_RATE_11M_INDEX < lowest_present_cck)989 cck |= IWL_RATE_11M_MASK >> IWL_FIRST_CCK_RATE;990 if (IWL_RATE_5M_INDEX < lowest_present_cck)991 cck |= IWL_RATE_5M_MASK >> IWL_FIRST_CCK_RATE;992 if (IWL_RATE_2M_INDEX < lowest_present_cck)993 cck |= IWL_RATE_2M_MASK >> IWL_FIRST_CCK_RATE;994 /* 1M already there or needed so always add */995 cck |= IWL_RATE_1M_MASK >> IWL_FIRST_CCK_RATE;996 997 IWL_DEBUG_RATE(priv, "Set basic rates cck:0x%.2x ofdm:0x%.2x\n",998 cck, ofdm);999 1000 /* "basic_rates" is a misnomer here -- should be called ACK rates */1001 ctx->staging.cck_basic_rates = cck;1002 ctx->staging.ofdm_basic_rates = ofdm;1003}1004 1005/*1006 * iwlagn_commit_rxon - commit staging_rxon to hardware1007 *1008 * The RXON command in staging_rxon is committed to the hardware and1009 * the active_rxon structure is updated with the new data. This1010 * function correctly transitions out of the RXON_ASSOC_MSK state if1011 * a HW tune is required based on the RXON structure changes.1012 *1013 * The connect/disconnect flow should be as the following:1014 *1015 * 1. make sure send RXON command with association bit unset if not connect1016 * this should include the channel and the band for the candidate1017 * to be connected to1018 * 2. Add Station before RXON association with the AP1019 * 3. RXON_timing has to send before RXON for connection1020 * 4. full RXON command - associated bit set1021 * 5. use RXON_ASSOC command to update any flags changes1022 */1023int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)1024{1025 /* cast away the const for active_rxon in this function */1026 struct iwl_rxon_cmd *active = (void *)&ctx->active;1027 bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);1028 int ret;1029 1030 lockdep_assert_held(&priv->mutex);1031 1032 if (!iwl_is_alive(priv))1033 return -EBUSY;1034 1035 /* This function hardcodes a bunch of dual-mode assumptions */1036 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);1037 1038 if (!ctx->is_active)1039 return 0;1040 1041 /* always get timestamp with Rx frame */1042 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;1043 1044 /* recalculate basic rates */1045 iwl_calc_basic_rates(priv, ctx);1046 1047 /*1048 * force CTS-to-self frames protection if RTS-CTS is not preferred1049 * one aggregation protection method1050 */1051 if (!priv->hw_params.use_rts_for_aggregation)1052 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;1053 1054 if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) ||1055 !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK))1056 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;1057 else1058 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;1059 1060 iwl_print_rx_config_cmd(priv, ctx->ctxid);1061 ret = iwl_check_rxon_cmd(priv, ctx);1062 if (ret) {1063 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");1064 return -EINVAL;1065 }1066 1067 /*1068 * receive commit_rxon request1069 * abort any previous channel switch if still in process1070 */1071 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&1072 (priv->switch_channel != ctx->staging.channel)) {1073 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",1074 le16_to_cpu(priv->switch_channel));1075 iwl_chswitch_done(priv, false);1076 }1077 1078 /*1079 * If we don't need to send a full RXON, we can use1080 * iwl_rxon_assoc_cmd which is used to reconfigure filter1081 * and other flags for the current radio configuration.1082 */1083 if (!iwl_full_rxon_required(priv, ctx)) {1084 ret = iwlagn_send_rxon_assoc(priv, ctx);1085 if (ret) {1086 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);1087 return ret;1088 }1089 1090 memcpy(active, &ctx->staging, sizeof(*active));1091 /*1092 * We do not commit tx power settings while channel changing,1093 * do it now if after settings changed.1094 */1095 iwl_set_tx_power(priv, priv->tx_power_next, false);1096 1097 /* make sure we are in the right PS state */1098 iwl_power_update_mode(priv, true);1099 1100 return 0;1101 }1102 1103 iwl_set_rxon_hwcrypto(priv, ctx, !iwlwifi_mod_params.swcrypto);1104 1105 IWL_DEBUG_INFO(priv,1106 "Going to commit RXON\n"1107 " * with%s RXON_FILTER_ASSOC_MSK\n"1108 " * channel = %d\n"1109 " * bssid = %pM\n",1110 (new_assoc ? "" : "out"),1111 le16_to_cpu(ctx->staging.channel),1112 ctx->staging.bssid_addr);1113 1114 /*1115 * Always clear associated first, but with the correct config.1116 * This is required as for example station addition for the1117 * AP station must be done after the BSSID is set to correctly1118 * set up filters in the device.1119 */1120 ret = iwlagn_rxon_disconn(priv, ctx);1121 if (ret)1122 return ret;1123 1124 ret = iwlagn_set_pan_params(priv);1125 if (ret)1126 return ret;1127 1128 if (new_assoc)1129 return iwlagn_rxon_connect(priv, ctx);1130 1131 return 0;1132}1133 1134void iwlagn_config_ht40(struct ieee80211_conf *conf,1135 struct iwl_rxon_context *ctx)1136{1137 if (conf_is_ht40_minus(conf)) {1138 ctx->ht.extension_chan_offset =1139 IEEE80211_HT_PARAM_CHA_SEC_BELOW;1140 ctx->ht.is_40mhz = true;1141 } else if (conf_is_ht40_plus(conf)) {1142 ctx->ht.extension_chan_offset =1143 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;1144 ctx->ht.is_40mhz = true;1145 } else {1146 ctx->ht.extension_chan_offset =1147 IEEE80211_HT_PARAM_CHA_SEC_NONE;1148 ctx->ht.is_40mhz = false;1149 }1150}1151 1152int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed)1153{1154 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1155 struct iwl_rxon_context *ctx;1156 struct ieee80211_conf *conf = &hw->conf;1157 struct ieee80211_channel *channel = conf->chandef.chan;1158 int ret = 0;1159 1160 IWL_DEBUG_MAC80211(priv, "enter: changed %#x\n", changed);1161 1162 mutex_lock(&priv->mutex);1163 1164 if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {1165 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");1166 goto out;1167 }1168 1169 if (!iwl_is_ready(priv)) {1170 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");1171 goto out;1172 }1173 1174 if (changed & (IEEE80211_CONF_CHANGE_SMPS |1175 IEEE80211_CONF_CHANGE_CHANNEL)) {1176 /* mac80211 uses static for non-HT which is what we want */1177 priv->current_ht_config.smps = conf->smps_mode;1178 1179 /*1180 * Recalculate chain counts.1181 *1182 * If monitor mode is enabled then mac80211 will1183 * set up the SM PS mode to OFF if an HT channel is1184 * configured.1185 */1186 for_each_context(priv, ctx)1187 iwlagn_set_rxon_chain(priv, ctx);1188 }1189 1190 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {1191 for_each_context(priv, ctx) {1192 /* Configure HT40 channels */1193 if (ctx->ht.enabled != conf_is_ht(conf))1194 ctx->ht.enabled = conf_is_ht(conf);1195 1196 if (ctx->ht.enabled) {1197 /* if HT40 is used, it should not change1198 * after associated except channel switch */1199 if (!ctx->ht.is_40mhz ||1200 !iwl_is_associated_ctx(ctx))1201 iwlagn_config_ht40(conf, ctx);1202 } else1203 ctx->ht.is_40mhz = false;1204 1205 /*1206 * Default to no protection. Protection mode will1207 * later be set from BSS config in iwl_ht_conf1208 */1209 ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;1210 1211 /* if we are switching from ht to 2.4 clear flags1212 * from any ht related info since 2.4 does not1213 * support ht */1214 if (le16_to_cpu(ctx->staging.channel) !=1215 channel->hw_value)1216 ctx->staging.flags = 0;1217 1218 iwl_set_rxon_channel(priv, channel, ctx);1219 iwl_set_rxon_ht(priv, &priv->current_ht_config);1220 1221 iwl_set_flags_for_band(priv, ctx, channel->band,1222 ctx->vif);1223 }1224 1225 iwl_update_bcast_stations(priv);1226 }1227 1228 if (changed & (IEEE80211_CONF_CHANGE_PS |1229 IEEE80211_CONF_CHANGE_IDLE)) {1230 ret = iwl_power_update_mode(priv, false);1231 if (ret)1232 IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");1233 }1234 1235 if (changed & IEEE80211_CONF_CHANGE_POWER) {1236 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",1237 priv->tx_power_user_lmt, conf->power_level);1238 1239 iwl_set_tx_power(priv, conf->power_level, false);1240 }1241 1242 for_each_context(priv, ctx) {1243 if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))1244 continue;1245 iwlagn_commit_rxon(priv, ctx);1246 }1247 out:1248 mutex_unlock(&priv->mutex);1249 IWL_DEBUG_MAC80211(priv, "leave\n");1250 1251 return ret;1252}1253 1254static void iwlagn_check_needed_chains(struct iwl_priv *priv,1255 struct iwl_rxon_context *ctx,1256 struct ieee80211_bss_conf *bss_conf)1257{1258 struct ieee80211_vif *vif = ctx->vif;1259 struct iwl_rxon_context *tmp;1260 struct ieee80211_sta *sta;1261 struct iwl_ht_config *ht_conf = &priv->current_ht_config;1262 struct ieee80211_sta_ht_cap *ht_cap;1263 bool need_multiple;1264 1265 lockdep_assert_held(&priv->mutex);1266 1267 switch (vif->type) {1268 case NL80211_IFTYPE_STATION:1269 rcu_read_lock();1270 sta = ieee80211_find_sta(vif, bss_conf->bssid);1271 if (!sta) {1272 /*1273 * If at all, this can only happen through a race1274 * when the AP disconnects us while we're still1275 * setting up the connection, in that case mac802111276 * will soon tell us about that.1277 */1278 need_multiple = false;1279 rcu_read_unlock();1280 break;1281 }1282 1283 ht_cap = &sta->deflink.ht_cap;1284 1285 need_multiple = true;1286 1287 /*1288 * If the peer advertises no support for receiving 2 and 31289 * stream MCS rates, it can't be transmitting them either.1290 */1291 if (ht_cap->mcs.rx_mask[1] == 0 &&1292 ht_cap->mcs.rx_mask[2] == 0) {1293 need_multiple = false;1294 } else if (!(ht_cap->mcs.tx_params &1295 IEEE80211_HT_MCS_TX_DEFINED)) {1296 /* If it can't TX MCS at all ... */1297 need_multiple = false;1298 } else if (ht_cap->mcs.tx_params &1299 IEEE80211_HT_MCS_TX_RX_DIFF) {1300 int maxstreams;1301 1302 /*1303 * But if it can receive them, it might still not1304 * be able to transmit them, which is what we need1305 * to check here -- so check the number of streams1306 * it advertises for TX (if different from RX).1307 */1308 1309 maxstreams = (ht_cap->mcs.tx_params &1310 IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK);1311 maxstreams >>=1312 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;1313 maxstreams += 1;1314 1315 if (maxstreams <= 1)1316 need_multiple = false;1317 }1318 1319 rcu_read_unlock();1320 break;1321 case NL80211_IFTYPE_ADHOC:1322 /* currently */1323 need_multiple = false;1324 break;1325 default:1326 /* only AP really */1327 need_multiple = true;1328 break;1329 }1330 1331 ctx->ht_need_multiple_chains = need_multiple;1332 1333 if (!need_multiple) {1334 /* check all contexts */1335 for_each_context(priv, tmp) {1336 if (!tmp->vif)1337 continue;1338 if (tmp->ht_need_multiple_chains) {1339 need_multiple = true;1340 break;1341 }1342 }1343 }1344 1345 ht_conf->single_chain_sufficient = !need_multiple;1346}1347 1348static void iwlagn_chain_noise_reset(struct iwl_priv *priv)1349{1350 struct iwl_chain_noise_data *data = &priv->chain_noise_data;1351 int ret;1352 1353 if (priv->calib_disabled & IWL_CHAIN_NOISE_CALIB_DISABLED)1354 return;1355 1356 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&1357 iwl_is_any_associated(priv)) {1358 struct iwl_calib_chain_noise_reset_cmd cmd;1359 1360 /* clear data for chain noise calibration algorithm */1361 data->chain_noise_a = 0;1362 data->chain_noise_b = 0;1363 data->chain_noise_c = 0;1364 data->chain_signal_a = 0;1365 data->chain_signal_b = 0;1366 data->chain_signal_c = 0;1367 data->beacon_count = 0;1368 1369 memset(&cmd, 0, sizeof(cmd));1370 iwl_set_calib_hdr(&cmd.hdr,1371 priv->phy_calib_chain_noise_reset_cmd);1372 ret = iwl_dvm_send_cmd_pdu(priv,1373 REPLY_PHY_CALIBRATION_CMD,1374 0, sizeof(cmd), &cmd);1375 if (ret)1376 IWL_ERR(priv,1377 "Could not send REPLY_PHY_CALIBRATION_CMD\n");1378 data->state = IWL_CHAIN_NOISE_ACCUMULATE;1379 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");1380 }1381}1382 1383void iwlagn_bss_info_changed(struct ieee80211_hw *hw,1384 struct ieee80211_vif *vif,1385 struct ieee80211_bss_conf *bss_conf,1386 u64 changes)1387{1388 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1389 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);1390 int ret;1391 bool force = false;1392 1393 mutex_lock(&priv->mutex);1394 1395 if (changes & BSS_CHANGED_IDLE && vif->cfg.idle) {1396 /*1397 * If we go idle, then clearly no "passive-no-rx"1398 * workaround is needed any more, this is a reset.1399 */1400 iwlagn_lift_passive_no_rx(priv);1401 }1402 1403 if (unlikely(!iwl_is_ready(priv))) {1404 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");1405 mutex_unlock(&priv->mutex);1406 return;1407 }1408 1409 if (unlikely(!ctx->vif)) {1410 IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n");1411 mutex_unlock(&priv->mutex);1412 return;1413 }1414 1415 if (changes & BSS_CHANGED_BEACON_INT)1416 force = true;1417 1418 if (changes & BSS_CHANGED_QOS) {1419 ctx->qos_data.qos_active = bss_conf->qos;1420 iwlagn_update_qos(priv, ctx);1421 }1422 1423 ctx->staging.assoc_id = cpu_to_le16(vif->cfg.aid);1424 if (vif->bss_conf.use_short_preamble)1425 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;1426 else1427 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;1428 1429 if (changes & BSS_CHANGED_ASSOC) {1430 if (vif->cfg.assoc) {1431 priv->timestamp = bss_conf->sync_tsf;1432 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;1433 } else {1434 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;1435 1436 if (ctx->ctxid == IWL_RXON_CTX_BSS)1437 priv->have_rekey_data = false;1438 }1439 1440 iwlagn_bt_coex_rssi_monitor(priv);1441 }1442 1443 if (ctx->ht.enabled) {1444 ctx->ht.protection = bss_conf->ht_operation_mode &1445 IEEE80211_HT_OP_MODE_PROTECTION;1446 ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode &1447 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);1448 iwlagn_check_needed_chains(priv, ctx, bss_conf);1449 iwl_set_rxon_ht(priv, &priv->current_ht_config);1450 }1451 1452 iwlagn_set_rxon_chain(priv, ctx);1453 1454 if (bss_conf->use_cts_prot && (priv->band != NL80211_BAND_5GHZ))1455 ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;1456 else1457 ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;1458 1459 if (bss_conf->use_cts_prot)1460 ctx->staging.flags |= RXON_FLG_SELF_CTS_EN;1461 else1462 ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN;1463 1464 memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);1465 1466 if (vif->type == NL80211_IFTYPE_AP ||1467 vif->type == NL80211_IFTYPE_ADHOC) {1468 if (vif->bss_conf.enable_beacon) {1469 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;1470 priv->beacon_ctx = ctx;1471 } else {1472 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;1473 priv->beacon_ctx = NULL;1474 }1475 }1476 1477 /*1478 * If the ucode decides to do beacon filtering before1479 * association, it will lose beacons that are needed1480 * before sending frames out on passive channels. This1481 * causes association failures on those channels. Enable1482 * receiving beacons in such cases.1483 */1484 1485 if (vif->type == NL80211_IFTYPE_STATION) {1486 if (!vif->cfg.assoc)1487 ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK;1488 else1489 ctx->staging.filter_flags &=1490 ~RXON_FILTER_BCON_AWARE_MSK;1491 }1492 1493 if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))1494 iwlagn_commit_rxon(priv, ctx);1495 1496 if (changes & BSS_CHANGED_ASSOC && vif->cfg.assoc) {1497 /*1498 * The chain noise calibration will enable PM upon1499 * completion. If calibration has already been run1500 * then we need to enable power management here.1501 */1502 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)1503 iwl_power_update_mode(priv, false);1504 1505 /* Enable RX differential gain and sensitivity calibrations */1506 iwlagn_chain_noise_reset(priv);1507 priv->start_calib = 1;1508 }1509 1510 if (changes & BSS_CHANGED_IBSS) {1511 ret = iwlagn_manage_ibss_station(priv, vif,1512 vif->cfg.ibss_joined);1513 if (ret)1514 IWL_ERR(priv, "failed to %s IBSS station %pM\n",1515 vif->cfg.ibss_joined ? "add" : "remove",1516 bss_conf->bssid);1517 }1518 1519 if (changes & BSS_CHANGED_BEACON && priv->beacon_ctx == ctx) {1520 if (iwlagn_update_beacon(priv, vif))1521 IWL_ERR(priv, "Error updating beacon\n");1522 }1523 1524 mutex_unlock(&priv->mutex);1525}1526 1527void iwlagn_post_scan(struct iwl_priv *priv)1528{1529 struct iwl_rxon_context *ctx;1530 1531 /*1532 * We do not commit power settings while scan is pending,1533 * do it now if the settings changed.1534 */1535 iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false);1536 iwl_set_tx_power(priv, priv->tx_power_next, false);1537 1538 /*1539 * Since setting the RXON may have been deferred while1540 * performing the scan, fire one off if needed1541 */1542 for_each_context(priv, ctx)1543 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))1544 iwlagn_commit_rxon(priv, ctx);1545 1546 iwlagn_set_pan_params(priv);1547}1548