1// SPDX-License-Identifier: GPL-2.0-only
   2/******************************************************************************
   3 *
   4 * Copyright(c) 2003 - 2014, 2022 Intel Corporation. All rights reserved.
   5 *
   6 * Portions of this file are derived from the ipw3945 project, as well
   7 * as portions of the ieee80211 subsystem header files.
   8 *****************************************************************************/
   9#include <linux/etherdevice.h>
  10#include <net/mac80211.h>
  11#include "iwl-trans.h"
  12#include "dev.h"
  13#include "agn.h"
  14
  15const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
  16
  17static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id)
  18{
  19	lockdep_assert_held(&priv->sta_lock);
  20
  21	if (sta_id >= IWLAGN_STATION_COUNT) {
  22		IWL_ERR(priv, "invalid sta_id %u\n", sta_id);
  23		return -EINVAL;
  24	}
  25	if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE))
  26		IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u "
  27			"addr %pM\n",
  28			sta_id, priv->stations[sta_id].sta.sta.addr);
  29
  30	if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) {
  31		IWL_DEBUG_ASSOC(priv,
  32				"STA id %u addr %pM already present in uCode "
  33				"(according to driver)\n",
  34				sta_id, priv->stations[sta_id].sta.sta.addr);
  35	} else {
  36		priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE;
  37		IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n",
  38				sta_id, priv->stations[sta_id].sta.sta.addr);
  39	}
  40	return 0;
  41}
  42
  43static void iwl_process_add_sta_resp(struct iwl_priv *priv,
  44				     struct iwl_rx_packet *pkt)
  45{
  46	struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data;
  47
  48	IWL_DEBUG_INFO(priv, "Processing response for adding station\n");
  49
  50	spin_lock_bh(&priv->sta_lock);
  51
  52	switch (add_sta_resp->status) {
  53	case ADD_STA_SUCCESS_MSK:
  54		IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n");
  55		break;
  56	case ADD_STA_NO_ROOM_IN_TABLE:
  57		IWL_ERR(priv, "Adding station failed, no room in table.\n");
  58		break;
  59	case ADD_STA_NO_BLOCK_ACK_RESOURCE:
  60		IWL_ERR(priv,
  61			"Adding station failed, no block ack resource.\n");
  62		break;
  63	case ADD_STA_MODIFY_NON_EXIST_STA:
  64		IWL_ERR(priv, "Attempting to modify non-existing station\n");
  65		break;
  66	default:
  67		IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n",
  68				add_sta_resp->status);
  69		break;
  70	}
  71
  72	spin_unlock_bh(&priv->sta_lock);
  73}
  74
  75void iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
  76{
  77	struct iwl_rx_packet *pkt = rxb_addr(rxb);
  78
  79	iwl_process_add_sta_resp(priv, pkt);
  80}
  81
  82int iwl_send_add_sta(struct iwl_priv *priv,
  83		     struct iwl_addsta_cmd *sta, u8 flags)
  84{
  85	int ret = 0;
  86	struct iwl_host_cmd cmd = {
  87		.id = REPLY_ADD_STA,
  88		.flags = flags,
  89		.data = { sta, },
  90		.len = { sizeof(*sta), },
  91	};
  92	u8 sta_id __maybe_unused = sta->sta.sta_id;
  93	struct iwl_rx_packet *pkt;
  94	struct iwl_add_sta_resp *add_sta_resp;
  95
  96	IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n",
  97		       sta_id, sta->sta.addr, flags & CMD_ASYNC ?  "a" : "");
  98
  99	if (!(flags & CMD_ASYNC)) {
 100		cmd.flags |= CMD_WANT_SKB;
 101		might_sleep();
 102	}
 103
 104	ret = iwl_dvm_send_cmd(priv, &cmd);
 105
 106	if (ret || (flags & CMD_ASYNC))
 107		return ret;
 108
 109	pkt = cmd.resp_pkt;
 110	add_sta_resp = (void *)pkt->data;
 111
 112	/* debug messages are printed in the handler */
 113	if (add_sta_resp->status == ADD_STA_SUCCESS_MSK) {
 114		spin_lock_bh(&priv->sta_lock);
 115		ret = iwl_sta_ucode_activate(priv, sta_id);
 116		spin_unlock_bh(&priv->sta_lock);
 117	} else {
 118		ret = -EIO;
 119	}
 120
 121	iwl_free_resp(&cmd);
 122
 123	return ret;
 124}
 125
 126bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 127			    struct iwl_rxon_context *ctx,
 128			    struct ieee80211_sta *sta)
 129{
 130	if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
 131		return false;
 132
 133#ifdef CONFIG_IWLWIFI_DEBUGFS
 134	if (priv->disable_ht40)
 135		return false;
 136#endif
 137
 138	/* special case for RXON */
 139	if (!sta)
 140		return true;
 141
 142	return sta->deflink.bandwidth >= IEEE80211_STA_RX_BW_40;
 143}
 144
 145static void iwl_sta_calc_ht_flags(struct iwl_priv *priv,
 146				  struct ieee80211_sta *sta,
 147				  struct iwl_rxon_context *ctx,
 148				  __le32 *flags, __le32 *mask)
 149{
 150	struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->deflink.ht_cap;
 151
 152	*mask = STA_FLG_RTS_MIMO_PROT_MSK |
 153		STA_FLG_MIMO_DIS_MSK |
 154		STA_FLG_HT40_EN_MSK |
 155		STA_FLG_MAX_AGG_SIZE_MSK |
 156		STA_FLG_AGG_MPDU_DENSITY_MSK;
 157	*flags = 0;
 158
 159	if (!sta || !sta_ht_inf->ht_supported)
 160		return;
 161
 162	IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n",
 163			sta->addr,
 164			(sta->deflink.smps_mode == IEEE80211_SMPS_STATIC) ?
 165			"static" :
 166			(sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC) ?
 167			"dynamic" : "disabled");
 168
 169	switch (sta->deflink.smps_mode) {
 170	case IEEE80211_SMPS_STATIC:
 171		*flags |= STA_FLG_MIMO_DIS_MSK;
 172		break;
 173	case IEEE80211_SMPS_DYNAMIC:
 174		*flags |= STA_FLG_RTS_MIMO_PROT_MSK;
 175		break;
 176	case IEEE80211_SMPS_OFF:
 177		break;
 178	default:
 179		IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->deflink.smps_mode);
 180		break;
 181	}
 182
 183	*flags |= cpu_to_le32(
 184		(u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
 185
 186	*flags |= cpu_to_le32(
 187		(u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
 188
 189	if (iwl_is_ht40_tx_allowed(priv, ctx, sta))
 190		*flags |= STA_FLG_HT40_EN_MSK;
 191}
 192
 193int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 194		      struct ieee80211_sta *sta)
 195{
 196	u8 sta_id = iwl_sta_id(sta);
 197	__le32 flags, mask;
 198	struct iwl_addsta_cmd cmd;
 199
 200	if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
 201		return -EINVAL;
 202
 203	iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
 204
 205	spin_lock_bh(&priv->sta_lock);
 206	priv->stations[sta_id].sta.station_flags &= ~mask;
 207	priv->stations[sta_id].sta.station_flags |= flags;
 208	spin_unlock_bh(&priv->sta_lock);
 209
 210	memset(&cmd, 0, sizeof(cmd));
 211	cmd.mode = STA_CONTROL_MODIFY_MSK;
 212	cmd.station_flags_msk = mask;
 213	cmd.station_flags = flags;
 214	cmd.sta.sta_id = sta_id;
 215
 216	return iwl_send_add_sta(priv, &cmd, 0);
 217}
 218
 219static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index,
 220				   struct ieee80211_sta *sta,
 221				   struct iwl_rxon_context *ctx)
 222{
 223	__le32 flags, mask;
 224
 225	iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask);
 226
 227	lockdep_assert_held(&priv->sta_lock);
 228	priv->stations[index].sta.station_flags &= ~mask;
 229	priv->stations[index].sta.station_flags |= flags;
 230}
 231
 232/*
 233 * iwl_prep_station - Prepare station information for addition
 234 *
 235 * should be called with sta_lock held
 236 */
 237u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 238		    const u8 *addr, bool is_ap, struct ieee80211_sta *sta)
 239{
 240	struct iwl_station_entry *station;
 241	int i;
 242	u8 sta_id = IWL_INVALID_STATION;
 243
 244	if (is_ap)
 245		sta_id = ctx->ap_sta_id;
 246	else if (is_broadcast_ether_addr(addr))
 247		sta_id = ctx->bcast_sta_id;
 248	else
 249		for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) {
 250			if (ether_addr_equal(priv->stations[i].sta.sta.addr,
 251					     addr)) {
 252				sta_id = i;
 253				break;
 254			}
 255
 256			if (!priv->stations[i].used &&
 257			    sta_id == IWL_INVALID_STATION)
 258				sta_id = i;
 259		}
 260
 261	/*
 262	 * These two conditions have the same outcome, but keep them
 263	 * separate
 264	 */
 265	if (unlikely(sta_id == IWL_INVALID_STATION))
 266		return sta_id;
 267
 268	/*
 269	 * uCode is not able to deal with multiple requests to add a
 270	 * station. Keep track if one is in progress so that we do not send
 271	 * another.
 272	 */
 273	if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 274		IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 275			       "added.\n", sta_id);
 276		return sta_id;
 277	}
 278
 279	if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 280	    (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) &&
 281	    ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) {
 282		IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 283				"adding again.\n", sta_id, addr);
 284		return sta_id;
 285	}
 286
 287	station = &priv->stations[sta_id];
 288	station->used = IWL_STA_DRIVER_ACTIVE;
 289	IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n",
 290			sta_id, addr);
 291	priv->num_stations++;
 292
 293	/* Set up the REPLY_ADD_STA command to send to device */
 294	memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 295	memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 296	station->sta.mode = 0;
 297	station->sta.sta.sta_id = sta_id;
 298	station->sta.station_flags = ctx->station_flags;
 299	station->ctxid = ctx->ctxid;
 300
 301	if (sta) {
 302		struct iwl_station_priv *sta_priv;
 303
 304		sta_priv = (void *)sta->drv_priv;
 305		sta_priv->ctx = ctx;
 306	}
 307
 308	/*
 309	 * OK to call unconditionally, since local stations (IBSS BSSID
 310	 * STA and broadcast STA) pass in a NULL sta, and mac80211
 311	 * doesn't allow HT IBSS.
 312	 */
 313	iwl_set_ht_add_station(priv, sta_id, sta, ctx);
 314
 315	return sta_id;
 316
 317}
 318
 319#define STA_WAIT_TIMEOUT (HZ/2)
 320
 321/*
 322 * iwl_add_station_common -
 323 */
 324int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 325			   const u8 *addr, bool is_ap,
 326			   struct ieee80211_sta *sta, u8 *sta_id_r)
 327{
 328	int ret = 0;
 329	u8 sta_id;
 330	struct iwl_addsta_cmd sta_cmd;
 331
 332	*sta_id_r = 0;
 333	spin_lock_bh(&priv->sta_lock);
 334	sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta);
 335	if (sta_id == IWL_INVALID_STATION) {
 336		IWL_ERR(priv, "Unable to prepare station %pM for addition\n",
 337			addr);
 338		spin_unlock_bh(&priv->sta_lock);
 339		return -EINVAL;
 340	}
 341
 342	/*
 343	 * uCode is not able to deal with multiple requests to add a
 344	 * station. Keep track if one is in progress so that we do not send
 345	 * another.
 346	 */
 347	if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) {
 348		IWL_DEBUG_INFO(priv, "STA %d already in process of being "
 349			       "added.\n", sta_id);
 350		spin_unlock_bh(&priv->sta_lock);
 351		return -EEXIST;
 352	}
 353
 354	if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) &&
 355	    (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 356		IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not "
 357				"adding again.\n", sta_id, addr);
 358		spin_unlock_bh(&priv->sta_lock);
 359		return -EEXIST;
 360	}
 361
 362	priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS;
 363	memcpy(&sta_cmd, &priv->stations[sta_id].sta,
 364	       sizeof(struct iwl_addsta_cmd));
 365	spin_unlock_bh(&priv->sta_lock);
 366
 367	/* Add station to device's station table */
 368	ret = iwl_send_add_sta(priv, &sta_cmd, 0);
 369	if (ret) {
 370		spin_lock_bh(&priv->sta_lock);
 371		IWL_ERR(priv, "Adding station %pM failed.\n",
 372			priv->stations[sta_id].sta.sta.addr);
 373		priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 374		priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 375		spin_unlock_bh(&priv->sta_lock);
 376	}
 377	*sta_id_r = sta_id;
 378	return ret;
 379}
 380
 381/*
 382 * iwl_sta_ucode_deactivate - deactivate ucode status for a station
 383 */
 384static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id)
 385{
 386	lockdep_assert_held(&priv->sta_lock);
 387
 388	/* Ucode must be active and driver must be non active */
 389	if ((priv->stations[sta_id].used &
 390	     (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) !=
 391	      IWL_STA_UCODE_ACTIVE)
 392		IWL_ERR(priv, "removed non active STA %u\n", sta_id);
 393
 394	priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE;
 395
 396	memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry));
 397	IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id);
 398}
 399
 400static int iwl_send_remove_station(struct iwl_priv *priv,
 401				   const u8 *addr, int sta_id,
 402				   bool temporary)
 403{
 404	struct iwl_rx_packet *pkt;
 405	int ret;
 406	struct iwl_rem_sta_cmd rm_sta_cmd;
 407	struct iwl_rem_sta_resp *rem_sta_resp;
 408
 409	struct iwl_host_cmd cmd = {
 410		.id = REPLY_REMOVE_STA,
 411		.len = { sizeof(struct iwl_rem_sta_cmd), },
 412		.data = { &rm_sta_cmd, },
 413	};
 414
 415	memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
 416	rm_sta_cmd.num_sta = 1;
 417	memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
 418
 419	cmd.flags |= CMD_WANT_SKB;
 420
 421	ret = iwl_dvm_send_cmd(priv, &cmd);
 422
 423	if (ret)
 424		return ret;
 425
 426	pkt = cmd.resp_pkt;
 427	rem_sta_resp = (void *)pkt->data;
 428
 429	switch (rem_sta_resp->status) {
 430	case REM_STA_SUCCESS_MSK:
 431		if (!temporary) {
 432			spin_lock_bh(&priv->sta_lock);
 433			iwl_sta_ucode_deactivate(priv, sta_id);
 434			spin_unlock_bh(&priv->sta_lock);
 435		}
 436		IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n");
 437		break;
 438	default:
 439		ret = -EIO;
 440		IWL_ERR(priv, "REPLY_REMOVE_STA failed\n");
 441		break;
 442	}
 443
 444	iwl_free_resp(&cmd);
 445
 446	return ret;
 447}
 448
 449/*
 450 * iwl_remove_station - Remove driver's knowledge of station.
 451 */
 452int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
 453		       const u8 *addr)
 454{
 455	u8 tid;
 456
 457	if (!iwl_is_ready(priv)) {
 458		IWL_DEBUG_INFO(priv,
 459			"Unable to remove station %pM, device not ready.\n",
 460			addr);
 461		/*
 462		 * It is typical for stations to be removed when we are
 463		 * going down. Return success since device will be down
 464		 * soon anyway
 465		 */
 466		return 0;
 467	}
 468
 469	IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d  %pM\n",
 470			sta_id, addr);
 471
 472	if (WARN_ON(sta_id == IWL_INVALID_STATION))
 473		return -EINVAL;
 474
 475	spin_lock_bh(&priv->sta_lock);
 476
 477	if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 478		IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n",
 479				addr);
 480		goto out_err;
 481	}
 482
 483	if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) {
 484		IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n",
 485				addr);
 486		goto out_err;
 487	}
 488
 489	if (priv->stations[sta_id].used & IWL_STA_LOCAL) {
 490		kfree(priv->stations[sta_id].lq);
 491		priv->stations[sta_id].lq = NULL;
 492	}
 493
 494	for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
 495		memset(&priv->tid_data[sta_id][tid], 0,
 496			sizeof(priv->tid_data[sta_id][tid]));
 497
 498	priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 499
 500	priv->num_stations--;
 501
 502	if (WARN_ON(priv->num_stations < 0))
 503		priv->num_stations = 0;
 504
 505	spin_unlock_bh(&priv->sta_lock);
 506
 507	return iwl_send_remove_station(priv, addr, sta_id, false);
 508out_err:
 509	spin_unlock_bh(&priv->sta_lock);
 510	return -EINVAL;
 511}
 512
 513void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id,
 514			    const u8 *addr)
 515{
 516	u8 tid;
 517
 518	if (!iwl_is_ready(priv)) {
 519		IWL_DEBUG_INFO(priv,
 520			"Unable to remove station %pM, device not ready.\n",
 521			addr);
 522		return;
 523	}
 524
 525	IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id);
 526
 527	if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION))
 528		return;
 529
 530	spin_lock_bh(&priv->sta_lock);
 531
 532	WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE));
 533
 534	for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++)
 535		memset(&priv->tid_data[sta_id][tid], 0,
 536			sizeof(priv->tid_data[sta_id][tid]));
 537
 538	priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE;
 539	priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 540
 541	priv->num_stations--;
 542
 543	if (WARN_ON_ONCE(priv->num_stations < 0))
 544		priv->num_stations = 0;
 545
 546	spin_unlock_bh(&priv->sta_lock);
 547}
 548
 549static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 550			    u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
 551{
 552	int i, r;
 553	u32 rate_flags = 0;
 554	__le32 rate_n_flags;
 555
 556	lockdep_assert_held(&priv->mutex);
 557
 558	memset(link_cmd, 0, sizeof(*link_cmd));
 559
 560	/* Set up the rate scaling to start at selected rate, fall back
 561	 * all the way down to 1M in IEEE order, and then spin on 1M */
 562	if (priv->band == NL80211_BAND_5GHZ)
 563		r = IWL_RATE_6M_INDEX;
 564	else if (ctx && ctx->vif && ctx->vif->p2p)
 565		r = IWL_RATE_6M_INDEX;
 566	else
 567		r = IWL_RATE_1M_INDEX;
 568
 569	if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE)
 570		rate_flags |= RATE_MCS_CCK_MSK;
 571
 572	rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) <<
 573				RATE_MCS_ANT_POS;
 574	rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags);
 575	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 576		link_cmd->rs_table[i].rate_n_flags = rate_n_flags;
 577
 578	link_cmd->general_params.single_stream_ant_msk =
 579			first_antenna(priv->nvm_data->valid_tx_ant);
 580
 581	link_cmd->general_params.dual_stream_ant_msk =
 582		priv->nvm_data->valid_tx_ant &
 583		~first_antenna(priv->nvm_data->valid_tx_ant);
 584	if (!link_cmd->general_params.dual_stream_ant_msk) {
 585		link_cmd->general_params.dual_stream_ant_msk = ANT_AB;
 586	} else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) {
 587		link_cmd->general_params.dual_stream_ant_msk =
 588			priv->nvm_data->valid_tx_ant;
 589	}
 590
 591	link_cmd->agg_params.agg_dis_start_th =
 592		LINK_QUAL_AGG_DISABLE_START_DEF;
 593	link_cmd->agg_params.agg_time_limit =
 594		cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 595
 596	link_cmd->sta_id = sta_id;
 597}
 598
 599/*
 600 * iwl_clear_ucode_stations - clear ucode station table bits
 601 *
 602 * This function clears all the bits in the driver indicating
 603 * which stations are active in the ucode. Call when something
 604 * other than explicit station management would cause this in
 605 * the ucode, e.g. unassociated RXON.
 606 */
 607void iwl_clear_ucode_stations(struct iwl_priv *priv,
 608			      struct iwl_rxon_context *ctx)
 609{
 610	int i;
 611	bool cleared = false;
 612
 613	IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n");
 614
 615	spin_lock_bh(&priv->sta_lock);
 616	for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 617		if (ctx && ctx->ctxid != priv->stations[i].ctxid)
 618			continue;
 619
 620		if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) {
 621			IWL_DEBUG_INFO(priv,
 622				"Clearing ucode active for station %d\n", i);
 623			priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 624			cleared = true;
 625		}
 626	}
 627	spin_unlock_bh(&priv->sta_lock);
 628
 629	if (!cleared)
 630		IWL_DEBUG_INFO(priv,
 631			       "No active stations found to be cleared\n");
 632}
 633
 634/*
 635 * iwl_restore_stations() - Restore driver known stations to device
 636 *
 637 * All stations considered active by driver, but not present in ucode, is
 638 * restored.
 639 *
 640 * Function sleeps.
 641 */
 642void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 643{
 644	struct iwl_addsta_cmd sta_cmd;
 645	static const struct iwl_link_quality_cmd zero_lq = {};
 646	struct iwl_link_quality_cmd lq;
 647	int i;
 648	bool found = false;
 649	int ret;
 650	bool send_lq;
 651
 652	if (!iwl_is_ready(priv)) {
 653		IWL_DEBUG_INFO(priv,
 654			       "Not ready yet, not restoring any stations.\n");
 655		return;
 656	}
 657
 658	IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n");
 659	spin_lock_bh(&priv->sta_lock);
 660	for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 661		if (ctx->ctxid != priv->stations[i].ctxid)
 662			continue;
 663		if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) &&
 664			    !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) {
 665			IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n",
 666					priv->stations[i].sta.sta.addr);
 667			priv->stations[i].sta.mode = 0;
 668			priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS;
 669			found = true;
 670		}
 671	}
 672
 673	for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 674		if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) {
 675			memcpy(&sta_cmd, &priv->stations[i].sta,
 676			       sizeof(struct iwl_addsta_cmd));
 677			send_lq = false;
 678			if (priv->stations[i].lq) {
 679				if (priv->wowlan)
 680					iwl_sta_fill_lq(priv, ctx, i, &lq);
 681				else
 682					memcpy(&lq, priv->stations[i].lq,
 683					       sizeof(struct iwl_link_quality_cmd));
 684
 685				if (memcmp(&lq, &zero_lq, sizeof(lq)))
 686					send_lq = true;
 687			}
 688			spin_unlock_bh(&priv->sta_lock);
 689			ret = iwl_send_add_sta(priv, &sta_cmd, 0);
 690			if (ret) {
 691				spin_lock_bh(&priv->sta_lock);
 692				IWL_ERR(priv, "Adding station %pM failed.\n",
 693					priv->stations[i].sta.sta.addr);
 694				priv->stations[i].used &=
 695						~IWL_STA_DRIVER_ACTIVE;
 696				priv->stations[i].used &=
 697						~IWL_STA_UCODE_INPROGRESS;
 698				continue;
 699			}
 700			/*
 701			 * Rate scaling has already been initialized, send
 702			 * current LQ command
 703			 */
 704			if (send_lq)
 705				iwl_send_lq_cmd(priv, ctx, &lq, 0, true);
 706			spin_lock_bh(&priv->sta_lock);
 707			priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS;
 708		}
 709	}
 710
 711	spin_unlock_bh(&priv->sta_lock);
 712	if (!found)
 713		IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 714			"no stations to be restored.\n");
 715	else
 716		IWL_DEBUG_INFO(priv, "Restoring all known stations .... "
 717			"complete.\n");
 718}
 719
 720int iwl_get_free_ucode_key_offset(struct iwl_priv *priv)
 721{
 722	int i;
 723
 724	for (i = 0; i < priv->sta_key_max_num; i++)
 725		if (!test_and_set_bit(i, &priv->ucode_key_table))
 726			return i;
 727
 728	return WEP_INVALID_OFFSET;
 729}
 730
 731void iwl_dealloc_bcast_stations(struct iwl_priv *priv)
 732{
 733	int i;
 734
 735	spin_lock_bh(&priv->sta_lock);
 736	for (i = 0; i < IWLAGN_STATION_COUNT; i++) {
 737		if (!(priv->stations[i].used & IWL_STA_BCAST))
 738			continue;
 739
 740		priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE;
 741		priv->num_stations--;
 742		if (WARN_ON(priv->num_stations < 0))
 743			priv->num_stations = 0;
 744		kfree(priv->stations[i].lq);
 745		priv->stations[i].lq = NULL;
 746	}
 747	spin_unlock_bh(&priv->sta_lock);
 748}
 749
 750#ifdef CONFIG_IWLWIFI_DEBUG
 751static void iwl_dump_lq_cmd(struct iwl_priv *priv,
 752			   struct iwl_link_quality_cmd *lq)
 753{
 754	int i;
 755	IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id);
 756	IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n",
 757		       lq->general_params.single_stream_ant_msk,
 758		       lq->general_params.dual_stream_ant_msk);
 759
 760	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
 761		IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n",
 762			       i, lq->rs_table[i].rate_n_flags);
 763}
 764#else
 765static inline void iwl_dump_lq_cmd(struct iwl_priv *priv,
 766				   struct iwl_link_quality_cmd *lq)
 767{
 768}
 769#endif
 770
 771/*
 772 * is_lq_table_valid() - Test one aspect of LQ cmd for validity
 773 *
 774 * It sometimes happens when a HT rate has been in use and we
 775 * loose connectivity with AP then mac80211 will first tell us that the
 776 * current channel is not HT anymore before removing the station. In such a
 777 * scenario the RXON flags will be updated to indicate we are not
 778 * communicating HT anymore, but the LQ command may still contain HT rates.
 779 * Test for this to prevent driver from sending LQ command between the time
 780 * RXON flags are updated and when LQ command is updated.
 781 */
 782static bool is_lq_table_valid(struct iwl_priv *priv,
 783			      struct iwl_rxon_context *ctx,
 784			      struct iwl_link_quality_cmd *lq)
 785{
 786	int i;
 787
 788	if (ctx->ht.enabled)
 789		return true;
 790
 791	IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n",
 792		       ctx->active.channel);
 793	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
 794		if (le32_to_cpu(lq->rs_table[i].rate_n_flags) &
 795		    RATE_MCS_HT_MSK) {
 796			IWL_DEBUG_INFO(priv,
 797				       "index %d of LQ expects HT channel\n",
 798				       i);
 799			return false;
 800		}
 801	}
 802	return true;
 803}
 804
 805/*
 806 * iwl_send_lq_cmd() - Send link quality command
 807 * @init: This command is sent as part of station initialization right
 808 *        after station has been added.
 809 *
 810 * The link quality command is sent as the last step of station creation.
 811 * This is the special case in which init is set and we call a callback in
 812 * this case to clear the state indicating that station creation is in
 813 * progress.
 814 */
 815int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 816		    struct iwl_link_quality_cmd *lq, u8 flags, bool init)
 817{
 818	int ret = 0;
 819	struct iwl_host_cmd cmd = {
 820		.id = REPLY_TX_LINK_QUALITY_CMD,
 821		.len = { sizeof(struct iwl_link_quality_cmd), },
 822		.flags = flags,
 823		.data = { lq, },
 824	};
 825
 826	if (WARN_ON(lq->sta_id == IWL_INVALID_STATION))
 827		return -EINVAL;
 828
 829
 830	spin_lock_bh(&priv->sta_lock);
 831	if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) {
 832		spin_unlock_bh(&priv->sta_lock);
 833		return -EINVAL;
 834	}
 835	spin_unlock_bh(&priv->sta_lock);
 836
 837	iwl_dump_lq_cmd(priv, lq);
 838	if (WARN_ON(init && (cmd.flags & CMD_ASYNC)))
 839		return -EINVAL;
 840
 841	if (is_lq_table_valid(priv, ctx, lq))
 842		ret = iwl_dvm_send_cmd(priv, &cmd);
 843	else
 844		ret = -EINVAL;
 845
 846	if (cmd.flags & CMD_ASYNC)
 847		return ret;
 848
 849	if (init) {
 850		IWL_DEBUG_INFO(priv, "init LQ command complete, "
 851			       "clearing sta addition status for sta %d\n",
 852			       lq->sta_id);
 853		spin_lock_bh(&priv->sta_lock);
 854		priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS;
 855		spin_unlock_bh(&priv->sta_lock);
 856	}
 857	return ret;
 858}
 859
 860
 861static struct iwl_link_quality_cmd *
 862iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 863		 u8 sta_id)
 864{
 865	struct iwl_link_quality_cmd *link_cmd;
 866
 867	link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
 868	if (!link_cmd) {
 869		IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
 870		return NULL;
 871	}
 872
 873	iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
 874
 875	return link_cmd;
 876}
 877
 878/*
 879 * iwlagn_add_bssid_station - Add the special IBSS BSSID station
 880 *
 881 * Function sleeps.
 882 */
 883int iwlagn_add_bssid_station(struct iwl_priv *priv,
 884			     struct iwl_rxon_context *ctx,
 885			     const u8 *addr, u8 *sta_id_r)
 886{
 887	int ret;
 888	u8 sta_id;
 889	struct iwl_link_quality_cmd *link_cmd;
 890
 891	if (sta_id_r)
 892		*sta_id_r = IWL_INVALID_STATION;
 893
 894	ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id);
 895	if (ret) {
 896		IWL_ERR(priv, "Unable to add station %pM\n", addr);
 897		return ret;
 898	}
 899
 900	if (sta_id_r)
 901		*sta_id_r = sta_id;
 902
 903	spin_lock_bh(&priv->sta_lock);
 904	priv->stations[sta_id].used |= IWL_STA_LOCAL;
 905	spin_unlock_bh(&priv->sta_lock);
 906
 907	/* Set up default rate scaling table in device's station table */
 908	link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
 909	if (!link_cmd) {
 910		IWL_ERR(priv,
 911			"Unable to initialize rate scaling for station %pM.\n",
 912			addr);
 913		return -ENOMEM;
 914	}
 915
 916	ret = iwl_send_lq_cmd(priv, ctx, link_cmd, 0, true);
 917	if (ret)
 918		IWL_ERR(priv, "Link quality command failed (%d)\n", ret);
 919
 920	spin_lock_bh(&priv->sta_lock);
 921	priv->stations[sta_id].lq = link_cmd;
 922	spin_unlock_bh(&priv->sta_lock);
 923
 924	return 0;
 925}
 926
 927/*
 928 * static WEP keys
 929 *
 930 * For each context, the device has a table of 4 static WEP keys
 931 * (one for each key index) that is updated with the following
 932 * commands.
 933 */
 934
 935static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv,
 936				      struct iwl_rxon_context *ctx,
 937				      bool send_if_empty)
 938{
 939	int i, not_empty = 0;
 940	u8 buff[sizeof(struct iwl_wep_cmd) +
 941		sizeof(struct iwl_wep_key) * WEP_KEYS_MAX];
 942	struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff;
 943	size_t cmd_size  = sizeof(struct iwl_wep_cmd);
 944	struct iwl_host_cmd cmd = {
 945		.id = ctx->wep_key_cmd,
 946		.data = { wep_cmd, },
 947	};
 948
 949	might_sleep();
 950
 951	memset(wep_cmd, 0, cmd_size +
 952			(sizeof(struct iwl_wep_key) * WEP_KEYS_MAX));
 953
 954	for (i = 0; i < WEP_KEYS_MAX ; i++) {
 955		wep_cmd->key[i].key_index = i;
 956		if (ctx->wep_keys[i].key_size) {
 957			wep_cmd->key[i].key_offset = i;
 958			not_empty = 1;
 959		} else {
 960			wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET;
 961		}
 962
 963		wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size;
 964		memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key,
 965				ctx->wep_keys[i].key_size);
 966	}
 967
 968	wep_cmd->global_key_type = WEP_KEY_WEP_TYPE;
 969	wep_cmd->num_keys = WEP_KEYS_MAX;
 970
 971	cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX;
 972
 973	cmd.len[0] = cmd_size;
 974
 975	if (not_empty || send_if_empty)
 976		return iwl_dvm_send_cmd(priv, &cmd);
 977	else
 978		return 0;
 979}
 980
 981int iwl_restore_default_wep_keys(struct iwl_priv *priv,
 982				 struct iwl_rxon_context *ctx)
 983{
 984	lockdep_assert_held(&priv->mutex);
 985
 986	return iwl_send_static_wepkey_cmd(priv, ctx, false);
 987}
 988
 989int iwl_remove_default_wep_key(struct iwl_priv *priv,
 990			       struct iwl_rxon_context *ctx,
 991			       struct ieee80211_key_conf *keyconf)
 992{
 993	int ret;
 994
 995	lockdep_assert_held(&priv->mutex);
 996
 997	IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n",
 998		      keyconf->keyidx);
 999
1000	memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0]));
1001	if (iwl_is_rfkill(priv)) {
1002		IWL_DEBUG_WEP(priv,
1003			"Not sending REPLY_WEPKEY command due to RFKILL.\n");
1004		/* but keys in device are clear anyway so return success */
1005		return 0;
1006	}
1007	ret = iwl_send_static_wepkey_cmd(priv, ctx, 1);
1008	IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n",
1009		      keyconf->keyidx, ret);
1010
1011	return ret;
1012}
1013
1014int iwl_set_default_wep_key(struct iwl_priv *priv,
1015			    struct iwl_rxon_context *ctx,
1016			    struct ieee80211_key_conf *keyconf)
1017{
1018	int ret;
1019
1020	lockdep_assert_held(&priv->mutex);
1021
1022	if (keyconf->keylen != WEP_KEY_LEN_128 &&
1023	    keyconf->keylen != WEP_KEY_LEN_64) {
1024		IWL_DEBUG_WEP(priv,
1025			      "Bad WEP key length %d\n", keyconf->keylen);
1026		return -EINVAL;
1027	}
1028
1029	keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT;
1030
1031	ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen;
1032	memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key,
1033							keyconf->keylen);
1034
1035	ret = iwl_send_static_wepkey_cmd(priv, ctx, false);
1036	IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n",
1037		keyconf->keylen, keyconf->keyidx, ret);
1038
1039	return ret;
1040}
1041
1042/*
1043 * dynamic (per-station) keys
1044 *
1045 * The dynamic keys are a little more complicated. The device has
1046 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys.
1047 * These are linked to stations by a table that contains an index
1048 * into the key table for each station/key index/{mcast,unicast},
1049 * i.e. it's basically an array of pointers like this:
1050 *	key_offset_t key_mapping[NUM_STATIONS][4][2];
1051 * (it really works differently, but you can think of it as such)
1052 *
1053 * The key uploading and linking happens in the same command, the
1054 * add station command with STA_MODIFY_KEY_MASK.
1055 */
1056
1057static u8 iwlagn_key_sta_id(struct iwl_priv *priv,
1058			    struct ieee80211_vif *vif,
1059			    struct ieee80211_sta *sta)
1060{
1061	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1062
1063	if (sta)
1064		return iwl_sta_id(sta);
1065
1066	/*
1067	 * The device expects GTKs for station interfaces to be
1068	 * installed as GTKs for the AP station. If we have no
1069	 * station ID, then use the ap_sta_id in that case.
1070	 */
1071	if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx)
1072		return vif_priv->ctx->ap_sta_id;
1073
1074	return IWL_INVALID_STATION;
1075}
1076
1077static int iwlagn_send_sta_key(struct iwl_priv *priv,
1078			       struct ieee80211_key_conf *keyconf,
1079			       u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k,
1080			       u32 cmd_flags)
1081{
1082	__le16 key_flags;
1083	struct iwl_addsta_cmd sta_cmd;
1084	size_t to_copy;
1085	int i;
1086
1087	spin_lock_bh(&priv->sta_lock);
1088	memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1089	spin_unlock_bh(&priv->sta_lock);
1090
1091	key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1092	key_flags |= STA_KEY_FLG_MAP_KEY_MSK;
1093
1094	switch (keyconf->cipher) {
1095	case WLAN_CIPHER_SUITE_CCMP:
1096		key_flags |= STA_KEY_FLG_CCMP;
1097		memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen);
1098		break;
1099	case WLAN_CIPHER_SUITE_TKIP:
1100		key_flags |= STA_KEY_FLG_TKIP;
1101		sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32;
1102		for (i = 0; i < 5; i++)
1103			sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]);
1104		/* keyconf may contain MIC rx/tx keys which iwl does not use */
1105		to_copy = min_t(size_t, sizeof(sta_cmd.key.key), keyconf->keylen);
1106		memcpy(sta_cmd.key.key, keyconf->key, to_copy);
1107		break;
1108	case WLAN_CIPHER_SUITE_WEP104:
1109		key_flags |= STA_KEY_FLG_KEY_SIZE_MSK;
1110		fallthrough;
1111	case WLAN_CIPHER_SUITE_WEP40:
1112		key_flags |= STA_KEY_FLG_WEP;
1113		memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen);
1114		break;
1115	default:
1116		WARN_ON(1);
1117		return -EINVAL;
1118	}
1119
1120	if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1121		key_flags |= STA_KEY_MULTICAST_MSK;
1122
1123	/* key pointer (offset) */
1124	sta_cmd.key.key_offset = keyconf->hw_key_idx;
1125
1126	sta_cmd.key.key_flags = key_flags;
1127	sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1128	sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1129
1130	return iwl_send_add_sta(priv, &sta_cmd, cmd_flags);
1131}
1132
1133void iwl_update_tkip_key(struct iwl_priv *priv,
1134			 struct ieee80211_vif *vif,
1135			 struct ieee80211_key_conf *keyconf,
1136			 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key)
1137{
1138	u8 sta_id = iwlagn_key_sta_id(priv, vif, sta);
1139
1140	if (sta_id == IWL_INVALID_STATION)
1141		return;
1142
1143	if (iwl_scan_cancel(priv)) {
1144		/* cancel scan failed, just live w/ bad key and rely
1145		   briefly on SW decryption */
1146		return;
1147	}
1148
1149	iwlagn_send_sta_key(priv, keyconf, sta_id,
1150			    iv32, phase1key, CMD_ASYNC);
1151}
1152
1153int iwl_remove_dynamic_key(struct iwl_priv *priv,
1154			   struct iwl_rxon_context *ctx,
1155			   struct ieee80211_key_conf *keyconf,
1156			   struct ieee80211_sta *sta)
1157{
1158	struct iwl_addsta_cmd sta_cmd;
1159	u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1160	__le16 key_flags;
1161
1162	/* if station isn't there, neither is the key */
1163	if (sta_id == IWL_INVALID_STATION)
1164		return -ENOENT;
1165
1166	spin_lock_bh(&priv->sta_lock);
1167	memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd));
1168	if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE))
1169		sta_id = IWL_INVALID_STATION;
1170	spin_unlock_bh(&priv->sta_lock);
1171
1172	if (sta_id == IWL_INVALID_STATION)
1173		return 0;
1174
1175	lockdep_assert_held(&priv->mutex);
1176
1177	ctx->key_mapping_keys--;
1178
1179	IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n",
1180		      keyconf->keyidx, sta_id);
1181
1182	if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table))
1183		IWL_ERR(priv, "offset %d not used in uCode key table.\n",
1184			keyconf->hw_key_idx);
1185
1186	key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1187	key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC |
1188		     STA_KEY_FLG_INVALID;
1189
1190	if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE))
1191		key_flags |= STA_KEY_MULTICAST_MSK;
1192
1193	sta_cmd.key.key_flags = key_flags;
1194	sta_cmd.key.key_offset = keyconf->hw_key_idx;
1195	sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK;
1196	sta_cmd.mode = STA_CONTROL_MODIFY_MSK;
1197
1198	return iwl_send_add_sta(priv, &sta_cmd, 0);
1199}
1200
1201int iwl_set_dynamic_key(struct iwl_priv *priv,
1202			struct iwl_rxon_context *ctx,
1203			struct ieee80211_key_conf *keyconf,
1204			struct ieee80211_sta *sta)
1205{
1206	struct ieee80211_key_seq seq;
1207	u16 p1k[5];
1208	int ret;
1209	u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta);
1210	const u8 *addr;
1211
1212	if (sta_id == IWL_INVALID_STATION)
1213		return -EINVAL;
1214
1215	lockdep_assert_held(&priv->mutex);
1216
1217	keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv);
1218	if (keyconf->hw_key_idx == WEP_INVALID_OFFSET)
1219		return -ENOSPC;
1220
1221	ctx->key_mapping_keys++;
1222
1223	switch (keyconf->cipher) {
1224	case WLAN_CIPHER_SUITE_TKIP:
1225		if (sta)
1226			addr = sta->addr;
1227		else /* station mode case only */
1228			addr = ctx->active.bssid_addr;
1229
1230		/* pre-fill phase 1 key into device cache */
1231		ieee80211_get_key_rx_seq(keyconf, 0, &seq);
1232		ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k);
1233		ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1234					  seq.tkip.iv32, p1k, 0);
1235		break;
1236	case WLAN_CIPHER_SUITE_CCMP:
1237	case WLAN_CIPHER_SUITE_WEP40:
1238	case WLAN_CIPHER_SUITE_WEP104:
1239		ret = iwlagn_send_sta_key(priv, keyconf, sta_id,
1240					  0, NULL, 0);
1241		break;
1242	default:
1243		IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher);
1244		ret = -EINVAL;
1245	}
1246
1247	if (ret) {
1248		ctx->key_mapping_keys--;
1249		clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table);
1250	}
1251
1252	IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n",
1253		      keyconf->cipher, keyconf->keylen, keyconf->keyidx,
1254		      sta ? sta->addr : NULL, ret);
1255
1256	return ret;
1257}
1258
1259/*
1260 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table.
1261 *
1262 * This adds the broadcast station into the driver's station table
1263 * and marks it driver active, so that it will be restored to the
1264 * device at the next best time.
1265 */
1266int iwlagn_alloc_bcast_station(struct iwl_priv *priv,
1267			       struct iwl_rxon_context *ctx)
1268{
1269	struct iwl_link_quality_cmd *link_cmd;
1270	u8 sta_id;
1271
1272	spin_lock_bh(&priv->sta_lock);
1273	sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL);
1274	if (sta_id == IWL_INVALID_STATION) {
1275		IWL_ERR(priv, "Unable to prepare broadcast station\n");
1276		spin_unlock_bh(&priv->sta_lock);
1277
1278		return -EINVAL;
1279	}
1280
1281	priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE;
1282	priv->stations[sta_id].used |= IWL_STA_BCAST;
1283	spin_unlock_bh(&priv->sta_lock);
1284
1285	link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1286	if (!link_cmd) {
1287		IWL_ERR(priv,
1288			"Unable to initialize rate scaling for bcast station.\n");
1289		return -ENOMEM;
1290	}
1291
1292	spin_lock_bh(&priv->sta_lock);
1293	priv->stations[sta_id].lq = link_cmd;
1294	spin_unlock_bh(&priv->sta_lock);
1295
1296	return 0;
1297}
1298
1299/*
1300 * iwl_update_bcast_station - update broadcast station's LQ command
1301 *
1302 * Only used by iwlagn. Placed here to have all bcast station management
1303 * code together.
1304 */
1305int iwl_update_bcast_station(struct iwl_priv *priv,
1306			     struct iwl_rxon_context *ctx)
1307{
1308	struct iwl_link_quality_cmd *link_cmd;
1309	u8 sta_id = ctx->bcast_sta_id;
1310
1311	link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id);
1312	if (!link_cmd) {
1313		IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n");
1314		return -ENOMEM;
1315	}
1316
1317	spin_lock_bh(&priv->sta_lock);
1318	if (priv->stations[sta_id].lq)
1319		kfree(priv->stations[sta_id].lq);
1320	else
1321		IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n");
1322	priv->stations[sta_id].lq = link_cmd;
1323	spin_unlock_bh(&priv->sta_lock);
1324
1325	return 0;
1326}
1327
1328int iwl_update_bcast_stations(struct iwl_priv *priv)
1329{
1330	struct iwl_rxon_context *ctx;
1331	int ret = 0;
1332
1333	for_each_context(priv, ctx) {
1334		ret = iwl_update_bcast_station(priv, ctx);
1335		if (ret)
1336			break;
1337	}
1338
1339	return ret;
1340}
1341
1342/*
1343 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table
1344 */
1345int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid)
1346{
1347	struct iwl_addsta_cmd sta_cmd;
1348
1349	lockdep_assert_held(&priv->mutex);
1350
1351	/* Remove "disable" flag, to enable Tx for this TID */
1352	spin_lock_bh(&priv->sta_lock);
1353	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX;
1354	priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid));
1355	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1356	memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1357	spin_unlock_bh(&priv->sta_lock);
1358
1359	return iwl_send_add_sta(priv, &sta_cmd, 0);
1360}
1361
1362int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta,
1363			 int tid, u16 ssn)
1364{
1365	int sta_id;
1366	struct iwl_addsta_cmd sta_cmd;
1367
1368	lockdep_assert_held(&priv->mutex);
1369
1370	sta_id = iwl_sta_id(sta);
1371	if (sta_id == IWL_INVALID_STATION)
1372		return -ENXIO;
1373
1374	spin_lock_bh(&priv->sta_lock);
1375	priv->stations[sta_id].sta.station_flags_msk = 0;
1376	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK;
1377	priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid;
1378	priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn);
1379	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1380	memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1381	spin_unlock_bh(&priv->sta_lock);
1382
1383	return iwl_send_add_sta(priv, &sta_cmd, 0);
1384}
1385
1386int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta,
1387			int tid)
1388{
1389	int sta_id;
1390	struct iwl_addsta_cmd sta_cmd;
1391
1392	lockdep_assert_held(&priv->mutex);
1393
1394	sta_id = iwl_sta_id(sta);
1395	if (sta_id == IWL_INVALID_STATION) {
1396		IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid);
1397		return -ENXIO;
1398	}
1399
1400	spin_lock_bh(&priv->sta_lock);
1401	priv->stations[sta_id].sta.station_flags_msk = 0;
1402	priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK;
1403	priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid;
1404	priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1405	memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd));
1406	spin_unlock_bh(&priv->sta_lock);
1407
1408	return iwl_send_add_sta(priv, &sta_cmd, 0);
1409}
1410
1411
1412
1413void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt)
1414{
1415	struct iwl_addsta_cmd cmd = {
1416		.mode = STA_CONTROL_MODIFY_MSK,
1417		.station_flags = STA_FLG_PWR_SAVE_MSK,
1418		.station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1419		.sta.sta_id = sta_id,
1420		.sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK,
1421		.sleep_tx_count = cpu_to_le16(cnt),
1422	};
1423
1424	iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1425}