1 /****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 4 * 5 * Portions of this file are derived from the ipw3945 project, as well 6 * as portions of the ieee80211 subsystem header files. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of version 2 of the GNU General Public License as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * The full GNU General Public License is included in this distribution in the 18 * file called LICENSE. 19 * 20 * Contact Information: 21 * Intel Linux Wireless <linuxwifi@intel.com> 22 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 23 * 24 *****************************************************************************/ 25 #include <linux/etherdevice.h> 26 #include <net/mac80211.h> 27 #include "iwl-trans.h" 28 #include "dev.h" 29 #include "agn.h" 30 31 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 32 33 static int iwl_sta_ucode_activate(struct iwl_priv *priv, u8 sta_id) 34 { 35 lockdep_assert_held(&priv->sta_lock); 36 37 if (sta_id >= IWLAGN_STATION_COUNT) { 38 IWL_ERR(priv, "invalid sta_id %u\n", sta_id); 39 return -EINVAL; 40 } 41 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) 42 IWL_ERR(priv, "ACTIVATE a non DRIVER active station id %u " 43 "addr %pM\n", 44 sta_id, priv->stations[sta_id].sta.sta.addr); 45 46 if (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) { 47 IWL_DEBUG_ASSOC(priv, 48 "STA id %u addr %pM already present in uCode " 49 "(according to driver)\n", 50 sta_id, priv->stations[sta_id].sta.sta.addr); 51 } else { 52 priv->stations[sta_id].used |= IWL_STA_UCODE_ACTIVE; 53 IWL_DEBUG_ASSOC(priv, "Added STA id %u addr %pM to uCode\n", 54 sta_id, priv->stations[sta_id].sta.sta.addr); 55 } 56 return 0; 57 } 58 59 static void iwl_process_add_sta_resp(struct iwl_priv *priv, 60 struct iwl_rx_packet *pkt) 61 { 62 struct iwl_add_sta_resp *add_sta_resp = (void *)pkt->data; 63 64 IWL_DEBUG_INFO(priv, "Processing response for adding station\n"); 65 66 spin_lock_bh(&priv->sta_lock); 67 68 switch (add_sta_resp->status) { 69 case ADD_STA_SUCCESS_MSK: 70 IWL_DEBUG_INFO(priv, "REPLY_ADD_STA PASSED\n"); 71 break; 72 case ADD_STA_NO_ROOM_IN_TABLE: 73 IWL_ERR(priv, "Adding station failed, no room in table.\n"); 74 break; 75 case ADD_STA_NO_BLOCK_ACK_RESOURCE: 76 IWL_ERR(priv, 77 "Adding station failed, no block ack resource.\n"); 78 break; 79 case ADD_STA_MODIFY_NON_EXIST_STA: 80 IWL_ERR(priv, "Attempting to modify non-existing station\n"); 81 break; 82 default: 83 IWL_DEBUG_ASSOC(priv, "Received REPLY_ADD_STA:(0x%08X)\n", 84 add_sta_resp->status); 85 break; 86 } 87 88 spin_unlock_bh(&priv->sta_lock); 89 } 90 91 void iwl_add_sta_callback(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb) 92 { 93 struct iwl_rx_packet *pkt = rxb_addr(rxb); 94 95 iwl_process_add_sta_resp(priv, pkt); 96 } 97 98 int iwl_send_add_sta(struct iwl_priv *priv, 99 struct iwl_addsta_cmd *sta, u8 flags) 100 { 101 int ret = 0; 102 struct iwl_host_cmd cmd = { 103 .id = REPLY_ADD_STA, 104 .flags = flags, 105 .data = { sta, }, 106 .len = { sizeof(*sta), }, 107 }; 108 u8 sta_id __maybe_unused = sta->sta.sta_id; 109 struct iwl_rx_packet *pkt; 110 struct iwl_add_sta_resp *add_sta_resp; 111 112 IWL_DEBUG_INFO(priv, "Adding sta %u (%pM) %ssynchronously\n", 113 sta_id, sta->sta.addr, flags & CMD_ASYNC ? "a" : ""); 114 115 if (!(flags & CMD_ASYNC)) { 116 cmd.flags |= CMD_WANT_SKB; 117 might_sleep(); 118 } 119 120 ret = iwl_dvm_send_cmd(priv, &cmd); 121 122 if (ret || (flags & CMD_ASYNC)) 123 return ret; 124 125 pkt = cmd.resp_pkt; 126 add_sta_resp = (void *)pkt->data; 127 128 /* debug messages are printed in the handler */ 129 if (add_sta_resp->status == ADD_STA_SUCCESS_MSK) { 130 spin_lock_bh(&priv->sta_lock); 131 ret = iwl_sta_ucode_activate(priv, sta_id); 132 spin_unlock_bh(&priv->sta_lock); 133 } else { 134 ret = -EIO; 135 } 136 137 iwl_free_resp(&cmd); 138 139 return ret; 140 } 141 142 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv, 143 struct iwl_rxon_context *ctx, 144 struct ieee80211_sta *sta) 145 { 146 if (!ctx->ht.enabled || !ctx->ht.is_40mhz) 147 return false; 148 149 #ifdef CONFIG_IWLWIFI_DEBUGFS 150 if (priv->disable_ht40) 151 return false; 152 #endif 153 154 /* special case for RXON */ 155 if (!sta) 156 return true; 157 158 return sta->bandwidth >= IEEE80211_STA_RX_BW_40; 159 } 160 161 static void iwl_sta_calc_ht_flags(struct iwl_priv *priv, 162 struct ieee80211_sta *sta, 163 struct iwl_rxon_context *ctx, 164 __le32 *flags, __le32 *mask) 165 { 166 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap; 167 168 *mask = STA_FLG_RTS_MIMO_PROT_MSK | 169 STA_FLG_MIMO_DIS_MSK | 170 STA_FLG_HT40_EN_MSK | 171 STA_FLG_MAX_AGG_SIZE_MSK | 172 STA_FLG_AGG_MPDU_DENSITY_MSK; 173 *flags = 0; 174 175 if (!sta || !sta_ht_inf->ht_supported) 176 return; 177 178 IWL_DEBUG_INFO(priv, "STA %pM SM PS mode: %s\n", 179 sta->addr, 180 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? 181 "static" : 182 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? 183 "dynamic" : "disabled"); 184 185 switch (sta->smps_mode) { 186 case IEEE80211_SMPS_STATIC: 187 *flags |= STA_FLG_MIMO_DIS_MSK; 188 break; 189 case IEEE80211_SMPS_DYNAMIC: 190 *flags |= STA_FLG_RTS_MIMO_PROT_MSK; 191 break; 192 case IEEE80211_SMPS_OFF: 193 break; 194 default: 195 IWL_WARN(priv, "Invalid MIMO PS mode %d\n", sta->smps_mode); 196 break; 197 } 198 199 *flags |= cpu_to_le32( 200 (u32)sta_ht_inf->ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS); 201 202 *flags |= cpu_to_le32( 203 (u32)sta_ht_inf->ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS); 204 205 if (iwl_is_ht40_tx_allowed(priv, ctx, sta)) 206 *flags |= STA_FLG_HT40_EN_MSK; 207 } 208 209 int iwl_sta_update_ht(struct iwl_priv *priv, struct iwl_rxon_context *ctx, 210 struct ieee80211_sta *sta) 211 { 212 u8 sta_id = iwl_sta_id(sta); 213 __le32 flags, mask; 214 struct iwl_addsta_cmd cmd; 215 216 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION)) 217 return -EINVAL; 218 219 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask); 220 221 spin_lock_bh(&priv->sta_lock); 222 priv->stations[sta_id].sta.station_flags &= ~mask; 223 priv->stations[sta_id].sta.station_flags |= flags; 224 spin_unlock_bh(&priv->sta_lock); 225 226 memset(&cmd, 0, sizeof(cmd)); 227 cmd.mode = STA_CONTROL_MODIFY_MSK; 228 cmd.station_flags_msk = mask; 229 cmd.station_flags = flags; 230 cmd.sta.sta_id = sta_id; 231 232 return iwl_send_add_sta(priv, &cmd, 0); 233 } 234 235 static void iwl_set_ht_add_station(struct iwl_priv *priv, u8 index, 236 struct ieee80211_sta *sta, 237 struct iwl_rxon_context *ctx) 238 { 239 __le32 flags, mask; 240 241 iwl_sta_calc_ht_flags(priv, sta, ctx, &flags, &mask); 242 243 lockdep_assert_held(&priv->sta_lock); 244 priv->stations[index].sta.station_flags &= ~mask; 245 priv->stations[index].sta.station_flags |= flags; 246 } 247 248 /** 249 * iwl_prep_station - Prepare station information for addition 250 * 251 * should be called with sta_lock held 252 */ 253 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx, 254 const u8 *addr, bool is_ap, struct ieee80211_sta *sta) 255 { 256 struct iwl_station_entry *station; 257 int i; 258 u8 sta_id = IWL_INVALID_STATION; 259 260 if (is_ap) 261 sta_id = ctx->ap_sta_id; 262 else if (is_broadcast_ether_addr(addr)) 263 sta_id = ctx->bcast_sta_id; 264 else 265 for (i = IWL_STA_ID; i < IWLAGN_STATION_COUNT; i++) { 266 if (ether_addr_equal(priv->stations[i].sta.sta.addr, 267 addr)) { 268 sta_id = i; 269 break; 270 } 271 272 if (!priv->stations[i].used && 273 sta_id == IWL_INVALID_STATION) 274 sta_id = i; 275 } 276 277 /* 278 * These two conditions have the same outcome, but keep them 279 * separate 280 */ 281 if (unlikely(sta_id == IWL_INVALID_STATION)) 282 return sta_id; 283 284 /* 285 * uCode is not able to deal with multiple requests to add a 286 * station. Keep track if one is in progress so that we do not send 287 * another. 288 */ 289 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { 290 IWL_DEBUG_INFO(priv, "STA %d already in process of being " 291 "added.\n", sta_id); 292 return sta_id; 293 } 294 295 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && 296 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE) && 297 ether_addr_equal(priv->stations[sta_id].sta.sta.addr, addr)) { 298 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not " 299 "adding again.\n", sta_id, addr); 300 return sta_id; 301 } 302 303 station = &priv->stations[sta_id]; 304 station->used = IWL_STA_DRIVER_ACTIVE; 305 IWL_DEBUG_ASSOC(priv, "Add STA to driver ID %d: %pM\n", 306 sta_id, addr); 307 priv->num_stations++; 308 309 /* Set up the REPLY_ADD_STA command to send to device */ 310 memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd)); 311 memcpy(station->sta.sta.addr, addr, ETH_ALEN); 312 station->sta.mode = 0; 313 station->sta.sta.sta_id = sta_id; 314 station->sta.station_flags = ctx->station_flags; 315 station->ctxid = ctx->ctxid; 316 317 if (sta) { 318 struct iwl_station_priv *sta_priv; 319 320 sta_priv = (void *)sta->drv_priv; 321 sta_priv->ctx = ctx; 322 } 323 324 /* 325 * OK to call unconditionally, since local stations (IBSS BSSID 326 * STA and broadcast STA) pass in a NULL sta, and mac80211 327 * doesn't allow HT IBSS. 328 */ 329 iwl_set_ht_add_station(priv, sta_id, sta, ctx); 330 331 return sta_id; 332 333 } 334 335 #define STA_WAIT_TIMEOUT (HZ/2) 336 337 /** 338 * iwl_add_station_common - 339 */ 340 int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx, 341 const u8 *addr, bool is_ap, 342 struct ieee80211_sta *sta, u8 *sta_id_r) 343 { 344 int ret = 0; 345 u8 sta_id; 346 struct iwl_addsta_cmd sta_cmd; 347 348 *sta_id_r = 0; 349 spin_lock_bh(&priv->sta_lock); 350 sta_id = iwl_prep_station(priv, ctx, addr, is_ap, sta); 351 if (sta_id == IWL_INVALID_STATION) { 352 IWL_ERR(priv, "Unable to prepare station %pM for addition\n", 353 addr); 354 spin_unlock_bh(&priv->sta_lock); 355 return -EINVAL; 356 } 357 358 /* 359 * uCode is not able to deal with multiple requests to add a 360 * station. Keep track if one is in progress so that we do not send 361 * another. 362 */ 363 if (priv->stations[sta_id].used & IWL_STA_UCODE_INPROGRESS) { 364 IWL_DEBUG_INFO(priv, "STA %d already in process of being " 365 "added.\n", sta_id); 366 spin_unlock_bh(&priv->sta_lock); 367 return -EEXIST; 368 } 369 370 if ((priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE) && 371 (priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { 372 IWL_DEBUG_ASSOC(priv, "STA %d (%pM) already added, not " 373 "adding again.\n", sta_id, addr); 374 spin_unlock_bh(&priv->sta_lock); 375 return -EEXIST; 376 } 377 378 priv->stations[sta_id].used |= IWL_STA_UCODE_INPROGRESS; 379 memcpy(&sta_cmd, &priv->stations[sta_id].sta, 380 sizeof(struct iwl_addsta_cmd)); 381 spin_unlock_bh(&priv->sta_lock); 382 383 /* Add station to device's station table */ 384 ret = iwl_send_add_sta(priv, &sta_cmd, 0); 385 if (ret) { 386 spin_lock_bh(&priv->sta_lock); 387 IWL_ERR(priv, "Adding station %pM failed.\n", 388 priv->stations[sta_id].sta.sta.addr); 389 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; 390 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; 391 spin_unlock_bh(&priv->sta_lock); 392 } 393 *sta_id_r = sta_id; 394 return ret; 395 } 396 397 /** 398 * iwl_sta_ucode_deactivate - deactivate ucode status for a station 399 */ 400 static void iwl_sta_ucode_deactivate(struct iwl_priv *priv, u8 sta_id) 401 { 402 lockdep_assert_held(&priv->sta_lock); 403 404 /* Ucode must be active and driver must be non active */ 405 if ((priv->stations[sta_id].used & 406 (IWL_STA_UCODE_ACTIVE | IWL_STA_DRIVER_ACTIVE)) != 407 IWL_STA_UCODE_ACTIVE) 408 IWL_ERR(priv, "removed non active STA %u\n", sta_id); 409 410 priv->stations[sta_id].used &= ~IWL_STA_UCODE_ACTIVE; 411 412 memset(&priv->stations[sta_id], 0, sizeof(struct iwl_station_entry)); 413 IWL_DEBUG_ASSOC(priv, "Removed STA %u\n", sta_id); 414 } 415 416 static int iwl_send_remove_station(struct iwl_priv *priv, 417 const u8 *addr, int sta_id, 418 bool temporary) 419 { 420 struct iwl_rx_packet *pkt; 421 int ret; 422 struct iwl_rem_sta_cmd rm_sta_cmd; 423 struct iwl_rem_sta_resp *rem_sta_resp; 424 425 struct iwl_host_cmd cmd = { 426 .id = REPLY_REMOVE_STA, 427 .len = { sizeof(struct iwl_rem_sta_cmd), }, 428 .data = { &rm_sta_cmd, }, 429 }; 430 431 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd)); 432 rm_sta_cmd.num_sta = 1; 433 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN); 434 435 cmd.flags |= CMD_WANT_SKB; 436 437 ret = iwl_dvm_send_cmd(priv, &cmd); 438 439 if (ret) 440 return ret; 441 442 pkt = cmd.resp_pkt; 443 rem_sta_resp = (void *)pkt->data; 444 445 switch (rem_sta_resp->status) { 446 case REM_STA_SUCCESS_MSK: 447 if (!temporary) { 448 spin_lock_bh(&priv->sta_lock); 449 iwl_sta_ucode_deactivate(priv, sta_id); 450 spin_unlock_bh(&priv->sta_lock); 451 } 452 IWL_DEBUG_ASSOC(priv, "REPLY_REMOVE_STA PASSED\n"); 453 break; 454 default: 455 ret = -EIO; 456 IWL_ERR(priv, "REPLY_REMOVE_STA failed\n"); 457 break; 458 } 459 460 iwl_free_resp(&cmd); 461 462 return ret; 463 } 464 465 /** 466 * iwl_remove_station - Remove driver's knowledge of station. 467 */ 468 int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id, 469 const u8 *addr) 470 { 471 u8 tid; 472 473 if (!iwl_is_ready(priv)) { 474 IWL_DEBUG_INFO(priv, 475 "Unable to remove station %pM, device not ready.\n", 476 addr); 477 /* 478 * It is typical for stations to be removed when we are 479 * going down. Return success since device will be down 480 * soon anyway 481 */ 482 return 0; 483 } 484 485 IWL_DEBUG_ASSOC(priv, "Removing STA from driver:%d %pM\n", 486 sta_id, addr); 487 488 if (WARN_ON(sta_id == IWL_INVALID_STATION)) 489 return -EINVAL; 490 491 spin_lock_bh(&priv->sta_lock); 492 493 if (!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)) { 494 IWL_DEBUG_INFO(priv, "Removing %pM but non DRIVER active\n", 495 addr); 496 goto out_err; 497 } 498 499 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) { 500 IWL_DEBUG_INFO(priv, "Removing %pM but non UCODE active\n", 501 addr); 502 goto out_err; 503 } 504 505 if (priv->stations[sta_id].used & IWL_STA_LOCAL) { 506 kfree(priv->stations[sta_id].lq); 507 priv->stations[sta_id].lq = NULL; 508 } 509 510 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) 511 memset(&priv->tid_data[sta_id][tid], 0, 512 sizeof(priv->tid_data[sta_id][tid])); 513 514 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; 515 516 priv->num_stations--; 517 518 if (WARN_ON(priv->num_stations < 0)) 519 priv->num_stations = 0; 520 521 spin_unlock_bh(&priv->sta_lock); 522 523 return iwl_send_remove_station(priv, addr, sta_id, false); 524 out_err: 525 spin_unlock_bh(&priv->sta_lock); 526 return -EINVAL; 527 } 528 529 void iwl_deactivate_station(struct iwl_priv *priv, const u8 sta_id, 530 const u8 *addr) 531 { 532 u8 tid; 533 534 if (!iwl_is_ready(priv)) { 535 IWL_DEBUG_INFO(priv, 536 "Unable to remove station %pM, device not ready.\n", 537 addr); 538 return; 539 } 540 541 IWL_DEBUG_ASSOC(priv, "Deactivating STA: %pM (%d)\n", addr, sta_id); 542 543 if (WARN_ON_ONCE(sta_id == IWL_INVALID_STATION)) 544 return; 545 546 spin_lock_bh(&priv->sta_lock); 547 548 WARN_ON_ONCE(!(priv->stations[sta_id].used & IWL_STA_DRIVER_ACTIVE)); 549 550 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) 551 memset(&priv->tid_data[sta_id][tid], 0, 552 sizeof(priv->tid_data[sta_id][tid])); 553 554 priv->stations[sta_id].used &= ~IWL_STA_DRIVER_ACTIVE; 555 priv->stations[sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; 556 557 priv->num_stations--; 558 559 if (WARN_ON_ONCE(priv->num_stations < 0)) 560 priv->num_stations = 0; 561 562 spin_unlock_bh(&priv->sta_lock); 563 } 564 565 static void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, 566 u8 sta_id, struct iwl_link_quality_cmd *link_cmd) 567 { 568 int i, r; 569 u32 rate_flags = 0; 570 __le32 rate_n_flags; 571 572 lockdep_assert_held(&priv->mutex); 573 574 memset(link_cmd, 0, sizeof(*link_cmd)); 575 576 /* Set up the rate scaling to start at selected rate, fall back 577 * all the way down to 1M in IEEE order, and then spin on 1M */ 578 if (priv->band == NL80211_BAND_5GHZ) 579 r = IWL_RATE_6M_INDEX; 580 else if (ctx && ctx->vif && ctx->vif->p2p) 581 r = IWL_RATE_6M_INDEX; 582 else 583 r = IWL_RATE_1M_INDEX; 584 585 if (r >= IWL_FIRST_CCK_RATE && r <= IWL_LAST_CCK_RATE) 586 rate_flags |= RATE_MCS_CCK_MSK; 587 588 rate_flags |= first_antenna(priv->nvm_data->valid_tx_ant) << 589 RATE_MCS_ANT_POS; 590 rate_n_flags = iwl_hw_set_rate_n_flags(iwl_rates[r].plcp, rate_flags); 591 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) 592 link_cmd->rs_table[i].rate_n_flags = rate_n_flags; 593 594 link_cmd->general_params.single_stream_ant_msk = 595 first_antenna(priv->nvm_data->valid_tx_ant); 596 597 link_cmd->general_params.dual_stream_ant_msk = 598 priv->nvm_data->valid_tx_ant & 599 ~first_antenna(priv->nvm_data->valid_tx_ant); 600 if (!link_cmd->general_params.dual_stream_ant_msk) { 601 link_cmd->general_params.dual_stream_ant_msk = ANT_AB; 602 } else if (num_of_ant(priv->nvm_data->valid_tx_ant) == 2) { 603 link_cmd->general_params.dual_stream_ant_msk = 604 priv->nvm_data->valid_tx_ant; 605 } 606 607 link_cmd->agg_params.agg_dis_start_th = 608 LINK_QUAL_AGG_DISABLE_START_DEF; 609 link_cmd->agg_params.agg_time_limit = 610 cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF); 611 612 link_cmd->sta_id = sta_id; 613 } 614 615 /** 616 * iwl_clear_ucode_stations - clear ucode station table bits 617 * 618 * This function clears all the bits in the driver indicating 619 * which stations are active in the ucode. Call when something 620 * other than explicit station management would cause this in 621 * the ucode, e.g. unassociated RXON. 622 */ 623 void iwl_clear_ucode_stations(struct iwl_priv *priv, 624 struct iwl_rxon_context *ctx) 625 { 626 int i; 627 bool cleared = false; 628 629 IWL_DEBUG_INFO(priv, "Clearing ucode stations in driver\n"); 630 631 spin_lock_bh(&priv->sta_lock); 632 for (i = 0; i < IWLAGN_STATION_COUNT; i++) { 633 if (ctx && ctx->ctxid != priv->stations[i].ctxid) 634 continue; 635 636 if (priv->stations[i].used & IWL_STA_UCODE_ACTIVE) { 637 IWL_DEBUG_INFO(priv, 638 "Clearing ucode active for station %d\n", i); 639 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; 640 cleared = true; 641 } 642 } 643 spin_unlock_bh(&priv->sta_lock); 644 645 if (!cleared) 646 IWL_DEBUG_INFO(priv, 647 "No active stations found to be cleared\n"); 648 } 649 650 /** 651 * iwl_restore_stations() - Restore driver known stations to device 652 * 653 * All stations considered active by driver, but not present in ucode, is 654 * restored. 655 * 656 * Function sleeps. 657 */ 658 void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 659 { 660 struct iwl_addsta_cmd sta_cmd; 661 static const struct iwl_link_quality_cmd zero_lq = {}; 662 struct iwl_link_quality_cmd lq; 663 int i; 664 bool found = false; 665 int ret; 666 bool send_lq; 667 668 if (!iwl_is_ready(priv)) { 669 IWL_DEBUG_INFO(priv, 670 "Not ready yet, not restoring any stations.\n"); 671 return; 672 } 673 674 IWL_DEBUG_ASSOC(priv, "Restoring all known stations ... start.\n"); 675 spin_lock_bh(&priv->sta_lock); 676 for (i = 0; i < IWLAGN_STATION_COUNT; i++) { 677 if (ctx->ctxid != priv->stations[i].ctxid) 678 continue; 679 if ((priv->stations[i].used & IWL_STA_DRIVER_ACTIVE) && 680 !(priv->stations[i].used & IWL_STA_UCODE_ACTIVE)) { 681 IWL_DEBUG_ASSOC(priv, "Restoring sta %pM\n", 682 priv->stations[i].sta.sta.addr); 683 priv->stations[i].sta.mode = 0; 684 priv->stations[i].used |= IWL_STA_UCODE_INPROGRESS; 685 found = true; 686 } 687 } 688 689 for (i = 0; i < IWLAGN_STATION_COUNT; i++) { 690 if ((priv->stations[i].used & IWL_STA_UCODE_INPROGRESS)) { 691 memcpy(&sta_cmd, &priv->stations[i].sta, 692 sizeof(struct iwl_addsta_cmd)); 693 send_lq = false; 694 if (priv->stations[i].lq) { 695 if (priv->wowlan) 696 iwl_sta_fill_lq(priv, ctx, i, &lq); 697 else 698 memcpy(&lq, priv->stations[i].lq, 699 sizeof(struct iwl_link_quality_cmd)); 700 701 if (memcmp(&lq, &zero_lq, sizeof(lq))) 702 send_lq = true; 703 } 704 spin_unlock_bh(&priv->sta_lock); 705 ret = iwl_send_add_sta(priv, &sta_cmd, 0); 706 if (ret) { 707 spin_lock_bh(&priv->sta_lock); 708 IWL_ERR(priv, "Adding station %pM failed.\n", 709 priv->stations[i].sta.sta.addr); 710 priv->stations[i].used &= 711 ~IWL_STA_DRIVER_ACTIVE; 712 priv->stations[i].used &= 713 ~IWL_STA_UCODE_INPROGRESS; 714 continue; 715 } 716 /* 717 * Rate scaling has already been initialized, send 718 * current LQ command 719 */ 720 if (send_lq) 721 iwl_send_lq_cmd(priv, ctx, &lq, 0, true); 722 spin_lock_bh(&priv->sta_lock); 723 priv->stations[i].used &= ~IWL_STA_UCODE_INPROGRESS; 724 } 725 } 726 727 spin_unlock_bh(&priv->sta_lock); 728 if (!found) 729 IWL_DEBUG_INFO(priv, "Restoring all known stations .... " 730 "no stations to be restored.\n"); 731 else 732 IWL_DEBUG_INFO(priv, "Restoring all known stations .... " 733 "complete.\n"); 734 } 735 736 int iwl_get_free_ucode_key_offset(struct iwl_priv *priv) 737 { 738 int i; 739 740 for (i = 0; i < priv->sta_key_max_num; i++) 741 if (!test_and_set_bit(i, &priv->ucode_key_table)) 742 return i; 743 744 return WEP_INVALID_OFFSET; 745 } 746 747 void iwl_dealloc_bcast_stations(struct iwl_priv *priv) 748 { 749 int i; 750 751 spin_lock_bh(&priv->sta_lock); 752 for (i = 0; i < IWLAGN_STATION_COUNT; i++) { 753 if (!(priv->stations[i].used & IWL_STA_BCAST)) 754 continue; 755 756 priv->stations[i].used &= ~IWL_STA_UCODE_ACTIVE; 757 priv->num_stations--; 758 if (WARN_ON(priv->num_stations < 0)) 759 priv->num_stations = 0; 760 kfree(priv->stations[i].lq); 761 priv->stations[i].lq = NULL; 762 } 763 spin_unlock_bh(&priv->sta_lock); 764 } 765 766 #ifdef CONFIG_IWLWIFI_DEBUG 767 static void iwl_dump_lq_cmd(struct iwl_priv *priv, 768 struct iwl_link_quality_cmd *lq) 769 { 770 int i; 771 IWL_DEBUG_RATE(priv, "lq station id 0x%x\n", lq->sta_id); 772 IWL_DEBUG_RATE(priv, "lq ant 0x%X 0x%X\n", 773 lq->general_params.single_stream_ant_msk, 774 lq->general_params.dual_stream_ant_msk); 775 776 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) 777 IWL_DEBUG_RATE(priv, "lq index %d 0x%X\n", 778 i, lq->rs_table[i].rate_n_flags); 779 } 780 #else 781 static inline void iwl_dump_lq_cmd(struct iwl_priv *priv, 782 struct iwl_link_quality_cmd *lq) 783 { 784 } 785 #endif 786 787 /** 788 * is_lq_table_valid() - Test one aspect of LQ cmd for validity 789 * 790 * It sometimes happens when a HT rate has been in use and we 791 * loose connectivity with AP then mac80211 will first tell us that the 792 * current channel is not HT anymore before removing the station. In such a 793 * scenario the RXON flags will be updated to indicate we are not 794 * communicating HT anymore, but the LQ command may still contain HT rates. 795 * Test for this to prevent driver from sending LQ command between the time 796 * RXON flags are updated and when LQ command is updated. 797 */ 798 static bool is_lq_table_valid(struct iwl_priv *priv, 799 struct iwl_rxon_context *ctx, 800 struct iwl_link_quality_cmd *lq) 801 { 802 int i; 803 804 if (ctx->ht.enabled) 805 return true; 806 807 IWL_DEBUG_INFO(priv, "Channel %u is not an HT channel\n", 808 ctx->active.channel); 809 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) { 810 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & 811 RATE_MCS_HT_MSK) { 812 IWL_DEBUG_INFO(priv, 813 "index %d of LQ expects HT channel\n", 814 i); 815 return false; 816 } 817 } 818 return true; 819 } 820 821 /** 822 * iwl_send_lq_cmd() - Send link quality command 823 * @init: This command is sent as part of station initialization right 824 * after station has been added. 825 * 826 * The link quality command is sent as the last step of station creation. 827 * This is the special case in which init is set and we call a callback in 828 * this case to clear the state indicating that station creation is in 829 * progress. 830 */ 831 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx, 832 struct iwl_link_quality_cmd *lq, u8 flags, bool init) 833 { 834 int ret = 0; 835 struct iwl_host_cmd cmd = { 836 .id = REPLY_TX_LINK_QUALITY_CMD, 837 .len = { sizeof(struct iwl_link_quality_cmd), }, 838 .flags = flags, 839 .data = { lq, }, 840 }; 841 842 if (WARN_ON(lq->sta_id == IWL_INVALID_STATION)) 843 return -EINVAL; 844 845 846 spin_lock_bh(&priv->sta_lock); 847 if (!(priv->stations[lq->sta_id].used & IWL_STA_DRIVER_ACTIVE)) { 848 spin_unlock_bh(&priv->sta_lock); 849 return -EINVAL; 850 } 851 spin_unlock_bh(&priv->sta_lock); 852 853 iwl_dump_lq_cmd(priv, lq); 854 if (WARN_ON(init && (cmd.flags & CMD_ASYNC))) 855 return -EINVAL; 856 857 if (is_lq_table_valid(priv, ctx, lq)) 858 ret = iwl_dvm_send_cmd(priv, &cmd); 859 else 860 ret = -EINVAL; 861 862 if (cmd.flags & CMD_ASYNC) 863 return ret; 864 865 if (init) { 866 IWL_DEBUG_INFO(priv, "init LQ command complete, " 867 "clearing sta addition status for sta %d\n", 868 lq->sta_id); 869 spin_lock_bh(&priv->sta_lock); 870 priv->stations[lq->sta_id].used &= ~IWL_STA_UCODE_INPROGRESS; 871 spin_unlock_bh(&priv->sta_lock); 872 } 873 return ret; 874 } 875 876 877 static struct iwl_link_quality_cmd * 878 iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, 879 u8 sta_id) 880 { 881 struct iwl_link_quality_cmd *link_cmd; 882 883 link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL); 884 if (!link_cmd) { 885 IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n"); 886 return NULL; 887 } 888 889 iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd); 890 891 return link_cmd; 892 } 893 894 /* 895 * iwlagn_add_bssid_station - Add the special IBSS BSSID station 896 * 897 * Function sleeps. 898 */ 899 int iwlagn_add_bssid_station(struct iwl_priv *priv, 900 struct iwl_rxon_context *ctx, 901 const u8 *addr, u8 *sta_id_r) 902 { 903 int ret; 904 u8 sta_id; 905 struct iwl_link_quality_cmd *link_cmd; 906 907 if (sta_id_r) 908 *sta_id_r = IWL_INVALID_STATION; 909 910 ret = iwl_add_station_common(priv, ctx, addr, 0, NULL, &sta_id); 911 if (ret) { 912 IWL_ERR(priv, "Unable to add station %pM\n", addr); 913 return ret; 914 } 915 916 if (sta_id_r) 917 *sta_id_r = sta_id; 918 919 spin_lock_bh(&priv->sta_lock); 920 priv->stations[sta_id].used |= IWL_STA_LOCAL; 921 spin_unlock_bh(&priv->sta_lock); 922 923 /* Set up default rate scaling table in device's station table */ 924 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); 925 if (!link_cmd) { 926 IWL_ERR(priv, 927 "Unable to initialize rate scaling for station %pM.\n", 928 addr); 929 return -ENOMEM; 930 } 931 932 ret = iwl_send_lq_cmd(priv, ctx, link_cmd, 0, true); 933 if (ret) 934 IWL_ERR(priv, "Link quality command failed (%d)\n", ret); 935 936 spin_lock_bh(&priv->sta_lock); 937 priv->stations[sta_id].lq = link_cmd; 938 spin_unlock_bh(&priv->sta_lock); 939 940 return 0; 941 } 942 943 /* 944 * static WEP keys 945 * 946 * For each context, the device has a table of 4 static WEP keys 947 * (one for each key index) that is updated with the following 948 * commands. 949 */ 950 951 static int iwl_send_static_wepkey_cmd(struct iwl_priv *priv, 952 struct iwl_rxon_context *ctx, 953 bool send_if_empty) 954 { 955 int i, not_empty = 0; 956 u8 buff[sizeof(struct iwl_wep_cmd) + 957 sizeof(struct iwl_wep_key) * WEP_KEYS_MAX]; 958 struct iwl_wep_cmd *wep_cmd = (struct iwl_wep_cmd *)buff; 959 size_t cmd_size = sizeof(struct iwl_wep_cmd); 960 struct iwl_host_cmd cmd = { 961 .id = ctx->wep_key_cmd, 962 .data = { wep_cmd, }, 963 }; 964 965 might_sleep(); 966 967 memset(wep_cmd, 0, cmd_size + 968 (sizeof(struct iwl_wep_key) * WEP_KEYS_MAX)); 969 970 for (i = 0; i < WEP_KEYS_MAX ; i++) { 971 wep_cmd->key[i].key_index = i; 972 if (ctx->wep_keys[i].key_size) { 973 wep_cmd->key[i].key_offset = i; 974 not_empty = 1; 975 } else { 976 wep_cmd->key[i].key_offset = WEP_INVALID_OFFSET; 977 } 978 979 wep_cmd->key[i].key_size = ctx->wep_keys[i].key_size; 980 memcpy(&wep_cmd->key[i].key[3], ctx->wep_keys[i].key, 981 ctx->wep_keys[i].key_size); 982 } 983 984 wep_cmd->global_key_type = WEP_KEY_WEP_TYPE; 985 wep_cmd->num_keys = WEP_KEYS_MAX; 986 987 cmd_size += sizeof(struct iwl_wep_key) * WEP_KEYS_MAX; 988 989 cmd.len[0] = cmd_size; 990 991 if (not_empty || send_if_empty) 992 return iwl_dvm_send_cmd(priv, &cmd); 993 else 994 return 0; 995 } 996 997 int iwl_restore_default_wep_keys(struct iwl_priv *priv, 998 struct iwl_rxon_context *ctx) 999 { 1000 lockdep_assert_held(&priv->mutex); 1001 1002 return iwl_send_static_wepkey_cmd(priv, ctx, false); 1003 } 1004 1005 int iwl_remove_default_wep_key(struct iwl_priv *priv, 1006 struct iwl_rxon_context *ctx, 1007 struct ieee80211_key_conf *keyconf) 1008 { 1009 int ret; 1010 1011 lockdep_assert_held(&priv->mutex); 1012 1013 IWL_DEBUG_WEP(priv, "Removing default WEP key: idx=%d\n", 1014 keyconf->keyidx); 1015 1016 memset(&ctx->wep_keys[keyconf->keyidx], 0, sizeof(ctx->wep_keys[0])); 1017 if (iwl_is_rfkill(priv)) { 1018 IWL_DEBUG_WEP(priv, 1019 "Not sending REPLY_WEPKEY command due to RFKILL.\n"); 1020 /* but keys in device are clear anyway so return success */ 1021 return 0; 1022 } 1023 ret = iwl_send_static_wepkey_cmd(priv, ctx, 1); 1024 IWL_DEBUG_WEP(priv, "Remove default WEP key: idx=%d ret=%d\n", 1025 keyconf->keyidx, ret); 1026 1027 return ret; 1028 } 1029 1030 int iwl_set_default_wep_key(struct iwl_priv *priv, 1031 struct iwl_rxon_context *ctx, 1032 struct ieee80211_key_conf *keyconf) 1033 { 1034 int ret; 1035 1036 lockdep_assert_held(&priv->mutex); 1037 1038 if (keyconf->keylen != WEP_KEY_LEN_128 && 1039 keyconf->keylen != WEP_KEY_LEN_64) { 1040 IWL_DEBUG_WEP(priv, 1041 "Bad WEP key length %d\n", keyconf->keylen); 1042 return -EINVAL; 1043 } 1044 1045 keyconf->hw_key_idx = IWLAGN_HW_KEY_DEFAULT; 1046 1047 ctx->wep_keys[keyconf->keyidx].key_size = keyconf->keylen; 1048 memcpy(&ctx->wep_keys[keyconf->keyidx].key, &keyconf->key, 1049 keyconf->keylen); 1050 1051 ret = iwl_send_static_wepkey_cmd(priv, ctx, false); 1052 IWL_DEBUG_WEP(priv, "Set default WEP key: len=%d idx=%d ret=%d\n", 1053 keyconf->keylen, keyconf->keyidx, ret); 1054 1055 return ret; 1056 } 1057 1058 /* 1059 * dynamic (per-station) keys 1060 * 1061 * The dynamic keys are a little more complicated. The device has 1062 * a key cache of up to STA_KEY_MAX_NUM/STA_KEY_MAX_NUM_PAN keys. 1063 * These are linked to stations by a table that contains an index 1064 * into the key table for each station/key index/{mcast,unicast}, 1065 * i.e. it's basically an array of pointers like this: 1066 * key_offset_t key_mapping[NUM_STATIONS][4][2]; 1067 * (it really works differently, but you can think of it as such) 1068 * 1069 * The key uploading and linking happens in the same command, the 1070 * add station command with STA_MODIFY_KEY_MASK. 1071 */ 1072 1073 static u8 iwlagn_key_sta_id(struct iwl_priv *priv, 1074 struct ieee80211_vif *vif, 1075 struct ieee80211_sta *sta) 1076 { 1077 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1078 1079 if (sta) 1080 return iwl_sta_id(sta); 1081 1082 /* 1083 * The device expects GTKs for station interfaces to be 1084 * installed as GTKs for the AP station. If we have no 1085 * station ID, then use the ap_sta_id in that case. 1086 */ 1087 if (vif->type == NL80211_IFTYPE_STATION && vif_priv->ctx) 1088 return vif_priv->ctx->ap_sta_id; 1089 1090 return IWL_INVALID_STATION; 1091 } 1092 1093 static int iwlagn_send_sta_key(struct iwl_priv *priv, 1094 struct ieee80211_key_conf *keyconf, 1095 u8 sta_id, u32 tkip_iv32, u16 *tkip_p1k, 1096 u32 cmd_flags) 1097 { 1098 __le16 key_flags; 1099 struct iwl_addsta_cmd sta_cmd; 1100 int i; 1101 1102 spin_lock_bh(&priv->sta_lock); 1103 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); 1104 spin_unlock_bh(&priv->sta_lock); 1105 1106 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 1107 key_flags |= STA_KEY_FLG_MAP_KEY_MSK; 1108 1109 switch (keyconf->cipher) { 1110 case WLAN_CIPHER_SUITE_CCMP: 1111 key_flags |= STA_KEY_FLG_CCMP; 1112 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen); 1113 break; 1114 case WLAN_CIPHER_SUITE_TKIP: 1115 key_flags |= STA_KEY_FLG_TKIP; 1116 sta_cmd.key.tkip_rx_tsc_byte2 = tkip_iv32; 1117 for (i = 0; i < 5; i++) 1118 sta_cmd.key.tkip_rx_ttak[i] = cpu_to_le16(tkip_p1k[i]); 1119 memcpy(sta_cmd.key.key, keyconf->key, keyconf->keylen); 1120 break; 1121 case WLAN_CIPHER_SUITE_WEP104: 1122 key_flags |= STA_KEY_FLG_KEY_SIZE_MSK; 1123 /* fall through */ 1124 case WLAN_CIPHER_SUITE_WEP40: 1125 key_flags |= STA_KEY_FLG_WEP; 1126 memcpy(&sta_cmd.key.key[3], keyconf->key, keyconf->keylen); 1127 break; 1128 default: 1129 WARN_ON(1); 1130 return -EINVAL; 1131 } 1132 1133 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) 1134 key_flags |= STA_KEY_MULTICAST_MSK; 1135 1136 /* key pointer (offset) */ 1137 sta_cmd.key.key_offset = keyconf->hw_key_idx; 1138 1139 sta_cmd.key.key_flags = key_flags; 1140 sta_cmd.mode = STA_CONTROL_MODIFY_MSK; 1141 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK; 1142 1143 return iwl_send_add_sta(priv, &sta_cmd, cmd_flags); 1144 } 1145 1146 void iwl_update_tkip_key(struct iwl_priv *priv, 1147 struct ieee80211_vif *vif, 1148 struct ieee80211_key_conf *keyconf, 1149 struct ieee80211_sta *sta, u32 iv32, u16 *phase1key) 1150 { 1151 u8 sta_id = iwlagn_key_sta_id(priv, vif, sta); 1152 1153 if (sta_id == IWL_INVALID_STATION) 1154 return; 1155 1156 if (iwl_scan_cancel(priv)) { 1157 /* cancel scan failed, just live w/ bad key and rely 1158 briefly on SW decryption */ 1159 return; 1160 } 1161 1162 iwlagn_send_sta_key(priv, keyconf, sta_id, 1163 iv32, phase1key, CMD_ASYNC); 1164 } 1165 1166 int iwl_remove_dynamic_key(struct iwl_priv *priv, 1167 struct iwl_rxon_context *ctx, 1168 struct ieee80211_key_conf *keyconf, 1169 struct ieee80211_sta *sta) 1170 { 1171 struct iwl_addsta_cmd sta_cmd; 1172 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta); 1173 __le16 key_flags; 1174 1175 /* if station isn't there, neither is the key */ 1176 if (sta_id == IWL_INVALID_STATION) 1177 return -ENOENT; 1178 1179 spin_lock_bh(&priv->sta_lock); 1180 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(sta_cmd)); 1181 if (!(priv->stations[sta_id].used & IWL_STA_UCODE_ACTIVE)) 1182 sta_id = IWL_INVALID_STATION; 1183 spin_unlock_bh(&priv->sta_lock); 1184 1185 if (sta_id == IWL_INVALID_STATION) 1186 return 0; 1187 1188 lockdep_assert_held(&priv->mutex); 1189 1190 ctx->key_mapping_keys--; 1191 1192 IWL_DEBUG_WEP(priv, "Remove dynamic key: idx=%d sta=%d\n", 1193 keyconf->keyidx, sta_id); 1194 1195 if (!test_and_clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table)) 1196 IWL_ERR(priv, "offset %d not used in uCode key table.\n", 1197 keyconf->hw_key_idx); 1198 1199 key_flags = cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS); 1200 key_flags |= STA_KEY_FLG_MAP_KEY_MSK | STA_KEY_FLG_NO_ENC | 1201 STA_KEY_FLG_INVALID; 1202 1203 if (!(keyconf->flags & IEEE80211_KEY_FLAG_PAIRWISE)) 1204 key_flags |= STA_KEY_MULTICAST_MSK; 1205 1206 sta_cmd.key.key_flags = key_flags; 1207 sta_cmd.key.key_offset = keyconf->hw_key_idx; 1208 sta_cmd.sta.modify_mask = STA_MODIFY_KEY_MASK; 1209 sta_cmd.mode = STA_CONTROL_MODIFY_MSK; 1210 1211 return iwl_send_add_sta(priv, &sta_cmd, 0); 1212 } 1213 1214 int iwl_set_dynamic_key(struct iwl_priv *priv, 1215 struct iwl_rxon_context *ctx, 1216 struct ieee80211_key_conf *keyconf, 1217 struct ieee80211_sta *sta) 1218 { 1219 struct ieee80211_key_seq seq; 1220 u16 p1k[5]; 1221 int ret; 1222 u8 sta_id = iwlagn_key_sta_id(priv, ctx->vif, sta); 1223 const u8 *addr; 1224 1225 if (sta_id == IWL_INVALID_STATION) 1226 return -EINVAL; 1227 1228 lockdep_assert_held(&priv->mutex); 1229 1230 keyconf->hw_key_idx = iwl_get_free_ucode_key_offset(priv); 1231 if (keyconf->hw_key_idx == WEP_INVALID_OFFSET) 1232 return -ENOSPC; 1233 1234 ctx->key_mapping_keys++; 1235 1236 switch (keyconf->cipher) { 1237 case WLAN_CIPHER_SUITE_TKIP: 1238 if (sta) 1239 addr = sta->addr; 1240 else /* station mode case only */ 1241 addr = ctx->active.bssid_addr; 1242 1243 /* pre-fill phase 1 key into device cache */ 1244 ieee80211_get_key_rx_seq(keyconf, 0, &seq); 1245 ieee80211_get_tkip_rx_p1k(keyconf, addr, seq.tkip.iv32, p1k); 1246 ret = iwlagn_send_sta_key(priv, keyconf, sta_id, 1247 seq.tkip.iv32, p1k, 0); 1248 break; 1249 case WLAN_CIPHER_SUITE_CCMP: 1250 case WLAN_CIPHER_SUITE_WEP40: 1251 case WLAN_CIPHER_SUITE_WEP104: 1252 ret = iwlagn_send_sta_key(priv, keyconf, sta_id, 1253 0, NULL, 0); 1254 break; 1255 default: 1256 IWL_ERR(priv, "Unknown cipher %x\n", keyconf->cipher); 1257 ret = -EINVAL; 1258 } 1259 1260 if (ret) { 1261 ctx->key_mapping_keys--; 1262 clear_bit(keyconf->hw_key_idx, &priv->ucode_key_table); 1263 } 1264 1265 IWL_DEBUG_WEP(priv, "Set dynamic key: cipher=%x len=%d idx=%d sta=%pM ret=%d\n", 1266 keyconf->cipher, keyconf->keylen, keyconf->keyidx, 1267 sta ? sta->addr : NULL, ret); 1268 1269 return ret; 1270 } 1271 1272 /** 1273 * iwlagn_alloc_bcast_station - add broadcast station into driver's station table. 1274 * 1275 * This adds the broadcast station into the driver's station table 1276 * and marks it driver active, so that it will be restored to the 1277 * device at the next best time. 1278 */ 1279 int iwlagn_alloc_bcast_station(struct iwl_priv *priv, 1280 struct iwl_rxon_context *ctx) 1281 { 1282 struct iwl_link_quality_cmd *link_cmd; 1283 u8 sta_id; 1284 1285 spin_lock_bh(&priv->sta_lock); 1286 sta_id = iwl_prep_station(priv, ctx, iwl_bcast_addr, false, NULL); 1287 if (sta_id == IWL_INVALID_STATION) { 1288 IWL_ERR(priv, "Unable to prepare broadcast station\n"); 1289 spin_unlock_bh(&priv->sta_lock); 1290 1291 return -EINVAL; 1292 } 1293 1294 priv->stations[sta_id].used |= IWL_STA_DRIVER_ACTIVE; 1295 priv->stations[sta_id].used |= IWL_STA_BCAST; 1296 spin_unlock_bh(&priv->sta_lock); 1297 1298 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); 1299 if (!link_cmd) { 1300 IWL_ERR(priv, 1301 "Unable to initialize rate scaling for bcast station.\n"); 1302 return -ENOMEM; 1303 } 1304 1305 spin_lock_bh(&priv->sta_lock); 1306 priv->stations[sta_id].lq = link_cmd; 1307 spin_unlock_bh(&priv->sta_lock); 1308 1309 return 0; 1310 } 1311 1312 /** 1313 * iwl_update_bcast_station - update broadcast station's LQ command 1314 * 1315 * Only used by iwlagn. Placed here to have all bcast station management 1316 * code together. 1317 */ 1318 int iwl_update_bcast_station(struct iwl_priv *priv, 1319 struct iwl_rxon_context *ctx) 1320 { 1321 struct iwl_link_quality_cmd *link_cmd; 1322 u8 sta_id = ctx->bcast_sta_id; 1323 1324 link_cmd = iwl_sta_alloc_lq(priv, ctx, sta_id); 1325 if (!link_cmd) { 1326 IWL_ERR(priv, "Unable to initialize rate scaling for bcast station.\n"); 1327 return -ENOMEM; 1328 } 1329 1330 spin_lock_bh(&priv->sta_lock); 1331 if (priv->stations[sta_id].lq) 1332 kfree(priv->stations[sta_id].lq); 1333 else 1334 IWL_DEBUG_INFO(priv, "Bcast station rate scaling has not been initialized yet.\n"); 1335 priv->stations[sta_id].lq = link_cmd; 1336 spin_unlock_bh(&priv->sta_lock); 1337 1338 return 0; 1339 } 1340 1341 int iwl_update_bcast_stations(struct iwl_priv *priv) 1342 { 1343 struct iwl_rxon_context *ctx; 1344 int ret = 0; 1345 1346 for_each_context(priv, ctx) { 1347 ret = iwl_update_bcast_station(priv, ctx); 1348 if (ret) 1349 break; 1350 } 1351 1352 return ret; 1353 } 1354 1355 /** 1356 * iwl_sta_tx_modify_enable_tid - Enable Tx for this TID in station table 1357 */ 1358 int iwl_sta_tx_modify_enable_tid(struct iwl_priv *priv, int sta_id, int tid) 1359 { 1360 struct iwl_addsta_cmd sta_cmd; 1361 1362 lockdep_assert_held(&priv->mutex); 1363 1364 /* Remove "disable" flag, to enable Tx for this TID */ 1365 spin_lock_bh(&priv->sta_lock); 1366 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_TID_DISABLE_TX; 1367 priv->stations[sta_id].sta.tid_disable_tx &= cpu_to_le16(~(1 << tid)); 1368 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 1369 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); 1370 spin_unlock_bh(&priv->sta_lock); 1371 1372 return iwl_send_add_sta(priv, &sta_cmd, 0); 1373 } 1374 1375 int iwl_sta_rx_agg_start(struct iwl_priv *priv, struct ieee80211_sta *sta, 1376 int tid, u16 ssn) 1377 { 1378 int sta_id; 1379 struct iwl_addsta_cmd sta_cmd; 1380 1381 lockdep_assert_held(&priv->mutex); 1382 1383 sta_id = iwl_sta_id(sta); 1384 if (sta_id == IWL_INVALID_STATION) 1385 return -ENXIO; 1386 1387 spin_lock_bh(&priv->sta_lock); 1388 priv->stations[sta_id].sta.station_flags_msk = 0; 1389 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_ADDBA_TID_MSK; 1390 priv->stations[sta_id].sta.add_immediate_ba_tid = (u8)tid; 1391 priv->stations[sta_id].sta.add_immediate_ba_ssn = cpu_to_le16(ssn); 1392 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 1393 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); 1394 spin_unlock_bh(&priv->sta_lock); 1395 1396 return iwl_send_add_sta(priv, &sta_cmd, 0); 1397 } 1398 1399 int iwl_sta_rx_agg_stop(struct iwl_priv *priv, struct ieee80211_sta *sta, 1400 int tid) 1401 { 1402 int sta_id; 1403 struct iwl_addsta_cmd sta_cmd; 1404 1405 lockdep_assert_held(&priv->mutex); 1406 1407 sta_id = iwl_sta_id(sta); 1408 if (sta_id == IWL_INVALID_STATION) { 1409 IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); 1410 return -ENXIO; 1411 } 1412 1413 spin_lock_bh(&priv->sta_lock); 1414 priv->stations[sta_id].sta.station_flags_msk = 0; 1415 priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_DELBA_TID_MSK; 1416 priv->stations[sta_id].sta.remove_immediate_ba_tid = (u8)tid; 1417 priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK; 1418 memcpy(&sta_cmd, &priv->stations[sta_id].sta, sizeof(struct iwl_addsta_cmd)); 1419 spin_unlock_bh(&priv->sta_lock); 1420 1421 return iwl_send_add_sta(priv, &sta_cmd, 0); 1422 } 1423 1424 1425 1426 void iwl_sta_modify_sleep_tx_count(struct iwl_priv *priv, int sta_id, int cnt) 1427 { 1428 struct iwl_addsta_cmd cmd = { 1429 .mode = STA_CONTROL_MODIFY_MSK, 1430 .station_flags = STA_FLG_PWR_SAVE_MSK, 1431 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1432 .sta.sta_id = sta_id, 1433 .sta.modify_mask = STA_MODIFY_SLEEP_TX_COUNT_MSK, 1434 .sleep_tx_count = cpu_to_le16(cnt), 1435 }; 1436 1437 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1438 } 1439