1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 #include <linux/kernel.h> 68 #include <linux/slab.h> 69 #include <linux/skbuff.h> 70 #include <linux/netdevice.h> 71 #include <linux/etherdevice.h> 72 #include <linux/ip.h> 73 #include <linux/if_arp.h> 74 #include <linux/time.h> 75 #include <net/mac80211.h> 76 #include <net/ieee80211_radiotap.h> 77 #include <net/tcp.h> 78 79 #include "iwl-op-mode.h" 80 #include "iwl-io.h" 81 #include "mvm.h" 82 #include "sta.h" 83 #include "time-event.h" 84 #include "iwl-eeprom-parse.h" 85 #include "iwl-phy-db.h" 86 #include "testmode.h" 87 #include "fw/error-dump.h" 88 #include "iwl-prph.h" 89 #include "iwl-nvm-parse.h" 90 91 static const struct ieee80211_iface_limit iwl_mvm_limits[] = { 92 { 93 .max = 1, 94 .types = BIT(NL80211_IFTYPE_STATION), 95 }, 96 { 97 .max = 1, 98 .types = BIT(NL80211_IFTYPE_AP) | 99 BIT(NL80211_IFTYPE_P2P_CLIENT) | 100 BIT(NL80211_IFTYPE_P2P_GO), 101 }, 102 { 103 .max = 1, 104 .types = BIT(NL80211_IFTYPE_P2P_DEVICE), 105 }, 106 }; 107 108 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = { 109 { 110 .num_different_channels = 2, 111 .max_interfaces = 3, 112 .limits = iwl_mvm_limits, 113 .n_limits = ARRAY_SIZE(iwl_mvm_limits), 114 }, 115 }; 116 117 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING 118 /* 119 * Use the reserved field to indicate magic values. 120 * these values will only be used internally by the driver, 121 * and won't make it to the fw (reserved will be 0). 122 * BC_FILTER_MAGIC_IP - configure the val of this attribute to 123 * be the vif's ip address. in case there is not a single 124 * ip address (0, or more than 1), this attribute will 125 * be skipped. 126 * BC_FILTER_MAGIC_MAC - set the val of this attribute to 127 * the LSB bytes of the vif's mac address 128 */ 129 enum { 130 BC_FILTER_MAGIC_NONE = 0, 131 BC_FILTER_MAGIC_IP, 132 BC_FILTER_MAGIC_MAC, 133 }; 134 135 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = { 136 { 137 /* arp */ 138 .discard = 0, 139 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL, 140 .attrs = { 141 { 142 /* frame type - arp, hw type - ethernet */ 143 .offset_type = 144 BCAST_FILTER_OFFSET_PAYLOAD_START, 145 .offset = sizeof(rfc1042_header), 146 .val = cpu_to_be32(0x08060001), 147 .mask = cpu_to_be32(0xffffffff), 148 }, 149 { 150 /* arp dest ip */ 151 .offset_type = 152 BCAST_FILTER_OFFSET_PAYLOAD_START, 153 .offset = sizeof(rfc1042_header) + 2 + 154 sizeof(struct arphdr) + 155 ETH_ALEN + sizeof(__be32) + 156 ETH_ALEN, 157 .mask = cpu_to_be32(0xffffffff), 158 /* mark it as special field */ 159 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP), 160 }, 161 }, 162 }, 163 { 164 /* dhcp offer bcast */ 165 .discard = 0, 166 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4, 167 .attrs = { 168 { 169 /* udp dest port - 68 (bootp client)*/ 170 .offset_type = BCAST_FILTER_OFFSET_IP_END, 171 .offset = offsetof(struct udphdr, dest), 172 .val = cpu_to_be32(0x00440000), 173 .mask = cpu_to_be32(0xffff0000), 174 }, 175 { 176 /* dhcp - lsb bytes of client hw address */ 177 .offset_type = BCAST_FILTER_OFFSET_IP_END, 178 .offset = 38, 179 .mask = cpu_to_be32(0xffffffff), 180 /* mark it as special field */ 181 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC), 182 }, 183 }, 184 }, 185 /* last filter must be empty */ 186 {}, 187 }; 188 #endif 189 190 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type) 191 { 192 if (!iwl_mvm_is_d0i3_supported(mvm)) 193 return; 194 195 IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type); 196 spin_lock_bh(&mvm->refs_lock); 197 mvm->refs[ref_type]++; 198 spin_unlock_bh(&mvm->refs_lock); 199 iwl_trans_ref(mvm->trans); 200 } 201 202 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type) 203 { 204 if (!iwl_mvm_is_d0i3_supported(mvm)) 205 return; 206 207 IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type); 208 spin_lock_bh(&mvm->refs_lock); 209 if (WARN_ON(!mvm->refs[ref_type])) { 210 spin_unlock_bh(&mvm->refs_lock); 211 return; 212 } 213 mvm->refs[ref_type]--; 214 spin_unlock_bh(&mvm->refs_lock); 215 iwl_trans_unref(mvm->trans); 216 } 217 218 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm, 219 enum iwl_mvm_ref_type except_ref) 220 { 221 int i, j; 222 223 if (!iwl_mvm_is_d0i3_supported(mvm)) 224 return; 225 226 spin_lock_bh(&mvm->refs_lock); 227 for (i = 0; i < IWL_MVM_REF_COUNT; i++) { 228 if (except_ref == i || !mvm->refs[i]) 229 continue; 230 231 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n", 232 i, mvm->refs[i]); 233 for (j = 0; j < mvm->refs[i]; j++) 234 iwl_trans_unref(mvm->trans); 235 mvm->refs[i] = 0; 236 } 237 spin_unlock_bh(&mvm->refs_lock); 238 } 239 240 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm) 241 { 242 int i; 243 bool taken = false; 244 245 if (!iwl_mvm_is_d0i3_supported(mvm)) 246 return true; 247 248 spin_lock_bh(&mvm->refs_lock); 249 for (i = 0; i < IWL_MVM_REF_COUNT; i++) { 250 if (mvm->refs[i]) { 251 taken = true; 252 break; 253 } 254 } 255 spin_unlock_bh(&mvm->refs_lock); 256 257 return taken; 258 } 259 260 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type) 261 { 262 iwl_mvm_ref(mvm, ref_type); 263 264 if (!wait_event_timeout(mvm->d0i3_exit_waitq, 265 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status), 266 HZ)) { 267 WARN_ON_ONCE(1); 268 iwl_mvm_unref(mvm, ref_type); 269 return -EIO; 270 } 271 272 return 0; 273 } 274 275 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm) 276 { 277 int i; 278 279 memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts)); 280 for (i = 0; i < NUM_PHY_CTX; i++) { 281 mvm->phy_ctxts[i].id = i; 282 mvm->phy_ctxts[i].ref = 0; 283 } 284 } 285 286 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy, 287 const char *alpha2, 288 enum iwl_mcc_source src_id, 289 bool *changed) 290 { 291 struct ieee80211_regdomain *regd = NULL; 292 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); 293 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 294 struct iwl_mcc_update_resp *resp; 295 296 IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2); 297 298 lockdep_assert_held(&mvm->mutex); 299 300 resp = iwl_mvm_update_mcc(mvm, alpha2, src_id); 301 if (IS_ERR_OR_NULL(resp)) { 302 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n", 303 PTR_ERR_OR_ZERO(resp)); 304 goto out; 305 } 306 307 if (changed) 308 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE); 309 310 regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg, 311 __le32_to_cpu(resp->n_channels), 312 resp->channels, 313 __le16_to_cpu(resp->mcc)); 314 /* Store the return source id */ 315 src_id = resp->source_id; 316 kfree(resp); 317 if (IS_ERR_OR_NULL(regd)) { 318 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n", 319 PTR_ERR_OR_ZERO(regd)); 320 goto out; 321 } 322 323 IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n", 324 regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id); 325 mvm->lar_regdom_set = true; 326 mvm->mcc_src = src_id; 327 328 out: 329 return regd; 330 } 331 332 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm) 333 { 334 bool changed; 335 struct ieee80211_regdomain *regd; 336 337 if (!iwl_mvm_is_lar_supported(mvm)) 338 return; 339 340 regd = iwl_mvm_get_current_regdomain(mvm, &changed); 341 if (!IS_ERR_OR_NULL(regd)) { 342 /* only update the regulatory core if changed */ 343 if (changed) 344 regulatory_set_wiphy_regd(mvm->hw->wiphy, regd); 345 346 kfree(regd); 347 } 348 } 349 350 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm, 351 bool *changed) 352 { 353 return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ", 354 iwl_mvm_is_wifi_mcc_supported(mvm) ? 355 MCC_SOURCE_GET_CURRENT : 356 MCC_SOURCE_OLD_FW, changed); 357 } 358 359 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm) 360 { 361 enum iwl_mcc_source used_src; 362 struct ieee80211_regdomain *regd; 363 int ret; 364 bool changed; 365 const struct ieee80211_regdomain *r = 366 rtnl_dereference(mvm->hw->wiphy->regd); 367 368 if (!r) 369 return -ENOENT; 370 371 /* save the last source in case we overwrite it below */ 372 used_src = mvm->mcc_src; 373 if (iwl_mvm_is_wifi_mcc_supported(mvm)) { 374 /* Notify the firmware we support wifi location updates */ 375 regd = iwl_mvm_get_current_regdomain(mvm, NULL); 376 if (!IS_ERR_OR_NULL(regd)) 377 kfree(regd); 378 } 379 380 /* Now set our last stored MCC and source */ 381 regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src, 382 &changed); 383 if (IS_ERR_OR_NULL(regd)) 384 return -EIO; 385 386 /* update cfg80211 if the regdomain was changed */ 387 if (changed) 388 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd); 389 else 390 ret = 0; 391 392 kfree(regd); 393 return ret; 394 } 395 396 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm) 397 { 398 struct ieee80211_hw *hw = mvm->hw; 399 int num_mac, ret, i; 400 static const u32 mvm_ciphers[] = { 401 WLAN_CIPHER_SUITE_WEP40, 402 WLAN_CIPHER_SUITE_WEP104, 403 WLAN_CIPHER_SUITE_TKIP, 404 WLAN_CIPHER_SUITE_CCMP, 405 }; 406 407 /* Tell mac80211 our characteristics */ 408 ieee80211_hw_set(hw, SIGNAL_DBM); 409 ieee80211_hw_set(hw, SPECTRUM_MGMT); 410 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 411 ieee80211_hw_set(hw, QUEUE_CONTROL); 412 ieee80211_hw_set(hw, WANT_MONITOR_VIF); 413 ieee80211_hw_set(hw, SUPPORTS_PS); 414 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 415 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 416 ieee80211_hw_set(hw, TIMING_BEACON_ONLY); 417 ieee80211_hw_set(hw, CONNECTION_MONITOR); 418 ieee80211_hw_set(hw, CHANCTX_STA_CSA); 419 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 420 ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS); 421 ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU); 422 ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR); 423 424 if (iwl_mvm_has_tlc_offload(mvm)) { 425 ieee80211_hw_set(hw, TX_AMPDU_SETUP_IN_HW); 426 ieee80211_hw_set(hw, HAS_RATE_CONTROL); 427 } 428 429 if (iwl_mvm_has_new_rx_api(mvm)) 430 ieee80211_hw_set(hw, SUPPORTS_REORDERING_BUFFER); 431 432 if (fw_has_capa(&mvm->fw->ucode_capa, 433 IWL_UCODE_TLV_CAPA_STA_PM_NOTIF)) { 434 ieee80211_hw_set(hw, AP_LINK_PS); 435 } else if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) { 436 /* 437 * we absolutely need this for the new TX API since that comes 438 * with many more queues than the current code can deal with 439 * for station powersave 440 */ 441 return -EINVAL; 442 } 443 444 if (mvm->trans->num_rx_queues > 1) 445 ieee80211_hw_set(hw, USES_RSS); 446 447 if (mvm->trans->max_skb_frags) 448 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG; 449 450 hw->queues = IEEE80211_MAX_QUEUES; 451 hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE; 452 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC | 453 IEEE80211_RADIOTAP_MCS_HAVE_STBC; 454 hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC | 455 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED; 456 457 hw->radiotap_timestamp.units_pos = 458 IEEE80211_RADIOTAP_TIMESTAMP_UNIT_US | 459 IEEE80211_RADIOTAP_TIMESTAMP_SPOS_PLCP_SIG_ACQ; 460 /* this is the case for CCK frames, it's better (only 8) for OFDM */ 461 hw->radiotap_timestamp.accuracy = 22; 462 463 if (!iwl_mvm_has_tlc_offload(mvm)) 464 hw->rate_control_algorithm = RS_NAME; 465 466 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES; 467 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP; 468 469 BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 6); 470 memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers)); 471 hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers); 472 hw->wiphy->cipher_suites = mvm->ciphers; 473 474 if (iwl_mvm_has_new_rx_api(mvm)) { 475 mvm->ciphers[hw->wiphy->n_cipher_suites] = 476 WLAN_CIPHER_SUITE_GCMP; 477 hw->wiphy->n_cipher_suites++; 478 mvm->ciphers[hw->wiphy->n_cipher_suites] = 479 WLAN_CIPHER_SUITE_GCMP_256; 480 hw->wiphy->n_cipher_suites++; 481 } 482 483 /* Enable 11w if software crypto is not enabled (as the 484 * firmware will interpret some mgmt packets, so enabling it 485 * with software crypto isn't safe). 486 */ 487 if (!iwlwifi_mod_params.swcrypto) { 488 ieee80211_hw_set(hw, MFP_CAPABLE); 489 mvm->ciphers[hw->wiphy->n_cipher_suites] = 490 WLAN_CIPHER_SUITE_AES_CMAC; 491 hw->wiphy->n_cipher_suites++; 492 if (iwl_mvm_has_new_rx_api(mvm)) { 493 mvm->ciphers[hw->wiphy->n_cipher_suites] = 494 WLAN_CIPHER_SUITE_BIP_GMAC_128; 495 hw->wiphy->n_cipher_suites++; 496 mvm->ciphers[hw->wiphy->n_cipher_suites] = 497 WLAN_CIPHER_SUITE_BIP_GMAC_256; 498 hw->wiphy->n_cipher_suites++; 499 } 500 } 501 502 /* currently FW API supports only one optional cipher scheme */ 503 if (mvm->fw->cs[0].cipher) { 504 const struct iwl_fw_cipher_scheme *fwcs = &mvm->fw->cs[0]; 505 struct ieee80211_cipher_scheme *cs = &mvm->cs[0]; 506 507 mvm->hw->n_cipher_schemes = 1; 508 509 cs->cipher = le32_to_cpu(fwcs->cipher); 510 cs->iftype = BIT(NL80211_IFTYPE_STATION); 511 cs->hdr_len = fwcs->hdr_len; 512 cs->pn_len = fwcs->pn_len; 513 cs->pn_off = fwcs->pn_off; 514 cs->key_idx_off = fwcs->key_idx_off; 515 cs->key_idx_mask = fwcs->key_idx_mask; 516 cs->key_idx_shift = fwcs->key_idx_shift; 517 cs->mic_len = fwcs->mic_len; 518 519 mvm->hw->cipher_schemes = mvm->cs; 520 mvm->ciphers[hw->wiphy->n_cipher_suites] = cs->cipher; 521 hw->wiphy->n_cipher_suites++; 522 } 523 524 ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS); 525 hw->wiphy->features |= 526 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR | 527 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR | 528 NL80211_FEATURE_ND_RANDOM_MAC_ADDR; 529 530 hw->sta_data_size = sizeof(struct iwl_mvm_sta); 531 hw->vif_data_size = sizeof(struct iwl_mvm_vif); 532 hw->chanctx_data_size = sizeof(u16); 533 534 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | 535 BIT(NL80211_IFTYPE_P2P_CLIENT) | 536 BIT(NL80211_IFTYPE_AP) | 537 BIT(NL80211_IFTYPE_P2P_GO) | 538 BIT(NL80211_IFTYPE_P2P_DEVICE) | 539 BIT(NL80211_IFTYPE_ADHOC); 540 541 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 542 hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR; 543 if (iwl_mvm_is_lar_supported(mvm)) 544 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED; 545 else 546 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 547 REGULATORY_DISABLE_BEACON_HINTS; 548 549 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD; 550 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH; 551 552 hw->wiphy->iface_combinations = iwl_mvm_iface_combinations; 553 hw->wiphy->n_iface_combinations = 554 ARRAY_SIZE(iwl_mvm_iface_combinations); 555 556 hw->wiphy->max_remain_on_channel_duration = 10000; 557 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 558 /* we can compensate an offset of up to 3 channels = 15 MHz */ 559 hw->wiphy->max_adj_channel_rssi_comp = 3 * 5; 560 561 /* Extract MAC address */ 562 memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN); 563 hw->wiphy->addresses = mvm->addresses; 564 hw->wiphy->n_addresses = 1; 565 566 /* Extract additional MAC addresses if available */ 567 num_mac = (mvm->nvm_data->n_hw_addrs > 1) ? 568 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1; 569 570 for (i = 1; i < num_mac; i++) { 571 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr, 572 ETH_ALEN); 573 mvm->addresses[i].addr[5]++; 574 hw->wiphy->n_addresses++; 575 } 576 577 iwl_mvm_reset_phy_ctxts(mvm); 578 579 hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm); 580 581 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 582 583 BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK); 584 BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) || 585 IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK)); 586 587 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 588 mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS; 589 else 590 mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS; 591 592 if (mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels) 593 hw->wiphy->bands[NL80211_BAND_2GHZ] = 594 &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 595 if (mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) { 596 hw->wiphy->bands[NL80211_BAND_5GHZ] = 597 &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 598 599 if (fw_has_capa(&mvm->fw->ucode_capa, 600 IWL_UCODE_TLV_CAPA_BEAMFORMER) && 601 fw_has_api(&mvm->fw->ucode_capa, 602 IWL_UCODE_TLV_API_LQ_SS_PARAMS)) 603 hw->wiphy->bands[NL80211_BAND_5GHZ]->vht_cap.cap |= 604 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE; 605 } 606 607 hw->wiphy->hw_version = mvm->trans->hw_id; 608 609 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM) 610 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 611 else 612 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 613 614 hw->wiphy->max_sched_scan_reqs = 1; 615 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX; 616 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES; 617 /* we create the 802.11 header and zero length SSID IE. */ 618 hw->wiphy->max_sched_scan_ie_len = 619 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2; 620 hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS; 621 hw->wiphy->max_sched_scan_plan_interval = U16_MAX; 622 623 /* 624 * the firmware uses u8 for num of iterations, but 0xff is saved for 625 * infinite loop, so the maximum number of iterations is actually 254. 626 */ 627 hw->wiphy->max_sched_scan_plan_iterations = 254; 628 629 hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN | 630 NL80211_FEATURE_LOW_PRIORITY_SCAN | 631 NL80211_FEATURE_P2P_GO_OPPPS | 632 NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE | 633 NL80211_FEATURE_DYNAMIC_SMPS | 634 NL80211_FEATURE_STATIC_SMPS | 635 NL80211_FEATURE_SUPPORTS_WMM_ADMISSION; 636 637 if (fw_has_capa(&mvm->fw->ucode_capa, 638 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)) 639 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION; 640 if (fw_has_capa(&mvm->fw->ucode_capa, 641 IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)) 642 hw->wiphy->features |= NL80211_FEATURE_QUIET; 643 644 if (fw_has_capa(&mvm->fw->ucode_capa, 645 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)) 646 hw->wiphy->features |= 647 NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES; 648 649 if (fw_has_capa(&mvm->fw->ucode_capa, 650 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 651 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES; 652 653 if (fw_has_api(&mvm->fw->ucode_capa, 654 IWL_UCODE_TLV_API_SCAN_TSF_REPORT)) { 655 wiphy_ext_feature_set(hw->wiphy, 656 NL80211_EXT_FEATURE_SCAN_START_TIME); 657 wiphy_ext_feature_set(hw->wiphy, 658 NL80211_EXT_FEATURE_BSS_PARENT_TSF); 659 wiphy_ext_feature_set(hw->wiphy, 660 NL80211_EXT_FEATURE_SET_SCAN_DWELL); 661 } 662 663 mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; 664 665 #ifdef CONFIG_PM_SLEEP 666 if (iwl_mvm_is_d0i3_supported(mvm) && 667 device_can_wakeup(mvm->trans->dev)) { 668 mvm->wowlan.flags = WIPHY_WOWLAN_ANY; 669 hw->wiphy->wowlan = &mvm->wowlan; 670 } 671 672 if (mvm->fw->img[IWL_UCODE_WOWLAN].num_sec && 673 mvm->trans->ops->d3_suspend && 674 mvm->trans->ops->d3_resume && 675 device_can_wakeup(mvm->trans->dev)) { 676 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT | 677 WIPHY_WOWLAN_DISCONNECT | 678 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 679 WIPHY_WOWLAN_RFKILL_RELEASE | 680 WIPHY_WOWLAN_NET_DETECT; 681 if (!iwlwifi_mod_params.swcrypto) 682 mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 683 WIPHY_WOWLAN_GTK_REKEY_FAILURE | 684 WIPHY_WOWLAN_4WAY_HANDSHAKE; 685 686 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS; 687 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN; 688 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN; 689 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES; 690 hw->wiphy->wowlan = &mvm->wowlan; 691 } 692 #endif 693 694 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING 695 /* assign default bcast filtering configuration */ 696 mvm->bcast_filters = iwl_mvm_default_bcast_filters; 697 #endif 698 699 ret = iwl_mvm_leds_init(mvm); 700 if (ret) 701 return ret; 702 703 if (fw_has_capa(&mvm->fw->ucode_capa, 704 IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) { 705 IWL_DEBUG_TDLS(mvm, "TDLS supported\n"); 706 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS; 707 ieee80211_hw_set(hw, TDLS_WIDER_BW); 708 } 709 710 if (fw_has_capa(&mvm->fw->ucode_capa, 711 IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) { 712 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n"); 713 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH; 714 } 715 716 hw->netdev_features |= mvm->cfg->features; 717 if (!iwl_mvm_is_csum_supported(mvm)) { 718 hw->netdev_features &= ~(IWL_TX_CSUM_NETIF_FLAGS | 719 NETIF_F_RXCSUM); 720 /* We may support SW TX CSUM */ 721 if (IWL_MVM_SW_TX_CSUM_OFFLOAD) 722 hw->netdev_features |= IWL_TX_CSUM_NETIF_FLAGS; 723 } 724 725 ret = ieee80211_register_hw(mvm->hw); 726 if (ret) 727 iwl_mvm_leds_exit(mvm); 728 mvm->init_status |= IWL_MVM_INIT_STATUS_REG_HW_INIT_COMPLETE; 729 730 if (mvm->cfg->vht_mu_mimo_supported) 731 wiphy_ext_feature_set(hw->wiphy, 732 NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER); 733 734 return ret; 735 } 736 737 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm, 738 struct ieee80211_sta *sta, 739 struct sk_buff *skb) 740 { 741 struct iwl_mvm_sta *mvmsta; 742 bool defer = false; 743 744 /* 745 * double check the IN_D0I3 flag both before and after 746 * taking the spinlock, in order to prevent taking 747 * the spinlock when not needed. 748 */ 749 if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))) 750 return false; 751 752 spin_lock(&mvm->d0i3_tx_lock); 753 /* 754 * testing the flag again ensures the skb dequeue 755 * loop (on d0i3 exit) hasn't run yet. 756 */ 757 if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)) 758 goto out; 759 760 mvmsta = iwl_mvm_sta_from_mac80211(sta); 761 if (mvmsta->sta_id == IWL_MVM_INVALID_STA || 762 mvmsta->sta_id != mvm->d0i3_ap_sta_id) 763 goto out; 764 765 __skb_queue_tail(&mvm->d0i3_tx, skb); 766 ieee80211_stop_queues(mvm->hw); 767 768 /* trigger wakeup */ 769 iwl_mvm_ref(mvm, IWL_MVM_REF_TX); 770 iwl_mvm_unref(mvm, IWL_MVM_REF_TX); 771 772 defer = true; 773 out: 774 spin_unlock(&mvm->d0i3_tx_lock); 775 return defer; 776 } 777 778 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw, 779 struct ieee80211_tx_control *control, 780 struct sk_buff *skb) 781 { 782 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 783 struct ieee80211_sta *sta = control->sta; 784 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 785 struct ieee80211_hdr *hdr = (void *)skb->data; 786 787 if (iwl_mvm_is_radio_killed(mvm)) { 788 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n"); 789 goto drop; 790 } 791 792 if (info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && 793 !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) && 794 !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status)) 795 goto drop; 796 797 /* treat non-bufferable MMPDUs on AP interfaces as broadcast */ 798 if ((info->control.vif->type == NL80211_IFTYPE_AP || 799 info->control.vif->type == NL80211_IFTYPE_ADHOC) && 800 ieee80211_is_mgmt(hdr->frame_control) && 801 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) 802 sta = NULL; 803 804 if (sta) { 805 if (iwl_mvm_defer_tx(mvm, sta, skb)) 806 return; 807 if (iwl_mvm_tx_skb(mvm, skb, sta)) 808 goto drop; 809 return; 810 } 811 812 if (iwl_mvm_tx_skb_non_sta(mvm, skb)) 813 goto drop; 814 return; 815 drop: 816 ieee80211_free_txskb(hw, skb); 817 } 818 819 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg) 820 { 821 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 822 return false; 823 return true; 824 } 825 826 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg) 827 { 828 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) 829 return false; 830 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG) 831 return true; 832 833 /* enabled by default */ 834 return true; 835 } 836 837 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...) \ 838 do { \ 839 if (!(le16_to_cpu(_tid_bm) & BIT(_tid))) \ 840 break; \ 841 iwl_fw_dbg_collect_trig(&(_mvm)->fwrt, _trig, _fmt); \ 842 } while (0) 843 844 static void 845 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 846 struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn, 847 enum ieee80211_ampdu_mlme_action action) 848 { 849 struct iwl_fw_dbg_trigger_tlv *trig; 850 struct iwl_fw_dbg_trigger_ba *ba_trig; 851 852 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) 853 return; 854 855 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); 856 ba_trig = (void *)trig->data; 857 858 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 859 ieee80211_vif_to_wdev(vif), trig)) 860 return; 861 862 switch (action) { 863 case IEEE80211_AMPDU_TX_OPERATIONAL: { 864 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 865 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 866 867 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid, 868 "TX AGG START: MAC %pM tid %d ssn %d\n", 869 sta->addr, tid, tid_data->ssn); 870 break; 871 } 872 case IEEE80211_AMPDU_TX_STOP_CONT: 873 CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid, 874 "TX AGG STOP: MAC %pM tid %d\n", 875 sta->addr, tid); 876 break; 877 case IEEE80211_AMPDU_RX_START: 878 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid, 879 "RX AGG START: MAC %pM tid %d ssn %d\n", 880 sta->addr, tid, rx_ba_ssn); 881 break; 882 case IEEE80211_AMPDU_RX_STOP: 883 CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid, 884 "RX AGG STOP: MAC %pM tid %d\n", 885 sta->addr, tid); 886 break; 887 default: 888 break; 889 } 890 } 891 892 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw, 893 struct ieee80211_vif *vif, 894 struct ieee80211_ampdu_params *params) 895 { 896 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 897 int ret; 898 bool tx_agg_ref = false; 899 struct ieee80211_sta *sta = params->sta; 900 enum ieee80211_ampdu_mlme_action action = params->action; 901 u16 tid = params->tid; 902 u16 *ssn = ¶ms->ssn; 903 u8 buf_size = params->buf_size; 904 bool amsdu = params->amsdu; 905 u16 timeout = params->timeout; 906 907 IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n", 908 sta->addr, tid, action); 909 910 if (!(mvm->nvm_data->sku_cap_11n_enable)) 911 return -EACCES; 912 913 /* return from D0i3 before starting a new Tx aggregation */ 914 switch (action) { 915 case IEEE80211_AMPDU_TX_START: 916 case IEEE80211_AMPDU_TX_STOP_CONT: 917 case IEEE80211_AMPDU_TX_STOP_FLUSH: 918 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 919 case IEEE80211_AMPDU_TX_OPERATIONAL: 920 /* 921 * for tx start, wait synchronously until D0i3 exit to 922 * get the correct sequence number for the tid. 923 * additionally, some other ampdu actions use direct 924 * target access, which is not handled automatically 925 * by the trans layer (unlike commands), so wait for 926 * d0i3 exit in these cases as well. 927 */ 928 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG); 929 if (ret) 930 return ret; 931 932 tx_agg_ref = true; 933 break; 934 default: 935 break; 936 } 937 938 mutex_lock(&mvm->mutex); 939 940 switch (action) { 941 case IEEE80211_AMPDU_RX_START: 942 if (!iwl_enable_rx_ampdu(mvm->cfg)) { 943 ret = -EINVAL; 944 break; 945 } 946 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size, 947 timeout); 948 break; 949 case IEEE80211_AMPDU_RX_STOP: 950 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size, 951 timeout); 952 break; 953 case IEEE80211_AMPDU_TX_START: 954 if (!iwl_enable_tx_ampdu(mvm->cfg)) { 955 ret = -EINVAL; 956 break; 957 } 958 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn); 959 break; 960 case IEEE80211_AMPDU_TX_STOP_CONT: 961 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid); 962 break; 963 case IEEE80211_AMPDU_TX_STOP_FLUSH: 964 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 965 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid); 966 break; 967 case IEEE80211_AMPDU_TX_OPERATIONAL: 968 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, 969 buf_size, amsdu); 970 break; 971 default: 972 WARN_ON_ONCE(1); 973 ret = -EINVAL; 974 break; 975 } 976 977 if (!ret) { 978 u16 rx_ba_ssn = 0; 979 980 if (action == IEEE80211_AMPDU_RX_START) 981 rx_ba_ssn = *ssn; 982 983 iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid, 984 rx_ba_ssn, action); 985 } 986 mutex_unlock(&mvm->mutex); 987 988 /* 989 * If the tid is marked as started, we won't use it for offloaded 990 * traffic on the next D0i3 entry. It's safe to unref. 991 */ 992 if (tx_agg_ref) 993 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG); 994 995 return ret; 996 } 997 998 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac, 999 struct ieee80211_vif *vif) 1000 { 1001 struct iwl_mvm *mvm = data; 1002 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1003 1004 mvmvif->uploaded = false; 1005 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1006 1007 spin_lock_bh(&mvm->time_event_lock); 1008 iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data); 1009 spin_unlock_bh(&mvm->time_event_lock); 1010 1011 mvmvif->phy_ctxt = NULL; 1012 memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data)); 1013 } 1014 1015 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm) 1016 { 1017 /* clear the D3 reconfig, we only need it to avoid dumping a 1018 * firmware coredump on reconfiguration, we shouldn't do that 1019 * on D3->D0 transition 1020 */ 1021 if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) { 1022 mvm->fwrt.dump.desc = &iwl_dump_desc_assert; 1023 iwl_fw_error_dump(&mvm->fwrt); 1024 } 1025 1026 /* cleanup all stale references (scan, roc), but keep the 1027 * ucode_down ref until reconfig is complete 1028 */ 1029 iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN); 1030 1031 iwl_mvm_stop_device(mvm); 1032 1033 mvm->scan_status = 0; 1034 mvm->ps_disabled = false; 1035 mvm->calibrating = false; 1036 1037 /* just in case one was running */ 1038 iwl_mvm_cleanup_roc_te(mvm); 1039 ieee80211_remain_on_channel_expired(mvm->hw); 1040 1041 /* 1042 * cleanup all interfaces, even inactive ones, as some might have 1043 * gone down during the HW restart 1044 */ 1045 ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm); 1046 1047 mvm->p2p_device_vif = NULL; 1048 mvm->d0i3_ap_sta_id = IWL_MVM_INVALID_STA; 1049 1050 iwl_mvm_reset_phy_ctxts(mvm); 1051 memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table)); 1052 memset(mvm->sta_deferred_frames, 0, sizeof(mvm->sta_deferred_frames)); 1053 memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif)); 1054 memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd)); 1055 1056 ieee80211_wake_queues(mvm->hw); 1057 1058 /* clear any stale d0i3 state */ 1059 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status); 1060 1061 mvm->vif_count = 0; 1062 mvm->rx_ba_sessions = 0; 1063 mvm->fwrt.dump.conf = FW_DBG_INVALID; 1064 mvm->monitor_on = false; 1065 1066 /* keep statistics ticking */ 1067 iwl_mvm_accu_radio_stats(mvm); 1068 } 1069 1070 int __iwl_mvm_mac_start(struct iwl_mvm *mvm) 1071 { 1072 int ret; 1073 1074 lockdep_assert_held(&mvm->mutex); 1075 1076 if (test_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status)) { 1077 /* 1078 * Now convert the HW_RESTART_REQUESTED flag to IN_HW_RESTART 1079 * so later code will - from now on - see that we're doing it. 1080 */ 1081 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status); 1082 clear_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status); 1083 /* Clean up some internal and mac80211 state on restart */ 1084 iwl_mvm_restart_cleanup(mvm); 1085 } else { 1086 /* Hold the reference to prevent runtime suspend while 1087 * the start procedure runs. It's a bit confusing 1088 * that the UCODE_DOWN reference is taken, but it just 1089 * means "UCODE is not UP yet". ( TODO: rename this 1090 * reference). 1091 */ 1092 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN); 1093 } 1094 ret = iwl_mvm_up(mvm); 1095 1096 if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1097 /* Something went wrong - we need to finish some cleanup 1098 * that normally iwl_mvm_mac_restart_complete() below 1099 * would do. 1100 */ 1101 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status); 1102 iwl_mvm_d0i3_enable_tx(mvm, NULL); 1103 } 1104 1105 return ret; 1106 } 1107 1108 static int iwl_mvm_mac_start(struct ieee80211_hw *hw) 1109 { 1110 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1111 int ret; 1112 1113 /* Some hw restart cleanups must not hold the mutex */ 1114 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) { 1115 /* 1116 * Make sure we are out of d0i3. This is needed 1117 * to make sure the reference accounting is correct 1118 * (and there is no stale d0i3_exit_work). 1119 */ 1120 wait_event_timeout(mvm->d0i3_exit_waitq, 1121 !test_bit(IWL_MVM_STATUS_IN_D0I3, 1122 &mvm->status), 1123 HZ); 1124 } 1125 1126 mutex_lock(&mvm->mutex); 1127 ret = __iwl_mvm_mac_start(mvm); 1128 mutex_unlock(&mvm->mutex); 1129 1130 return ret; 1131 } 1132 1133 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm) 1134 { 1135 int ret; 1136 1137 mutex_lock(&mvm->mutex); 1138 1139 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status); 1140 iwl_mvm_d0i3_enable_tx(mvm, NULL); 1141 ret = iwl_mvm_update_quotas(mvm, true, NULL); 1142 if (ret) 1143 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n", 1144 ret); 1145 1146 /* allow transport/FW low power modes */ 1147 iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN); 1148 1149 /* 1150 * If we have TDLS peers, remove them. We don't know the last seqno/PN 1151 * of packets the FW sent out, so we must reconnect. 1152 */ 1153 iwl_mvm_teardown_tdls_peers(mvm); 1154 1155 mutex_unlock(&mvm->mutex); 1156 } 1157 1158 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm) 1159 { 1160 if (iwl_mvm_is_d0i3_supported(mvm) && 1161 iwl_mvm_enter_d0i3_on_suspend(mvm)) 1162 WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq, 1163 !test_bit(IWL_MVM_STATUS_IN_D0I3, 1164 &mvm->status), 1165 HZ), 1166 "D0i3 exit on resume timed out\n"); 1167 } 1168 1169 static void 1170 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw, 1171 enum ieee80211_reconfig_type reconfig_type) 1172 { 1173 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1174 1175 switch (reconfig_type) { 1176 case IEEE80211_RECONFIG_TYPE_RESTART: 1177 iwl_mvm_restart_complete(mvm); 1178 break; 1179 case IEEE80211_RECONFIG_TYPE_SUSPEND: 1180 iwl_mvm_resume_complete(mvm); 1181 break; 1182 } 1183 } 1184 1185 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm) 1186 { 1187 lockdep_assert_held(&mvm->mutex); 1188 1189 /* firmware counters are obviously reset now, but we shouldn't 1190 * partially track so also clear the fw_reset_accu counters. 1191 */ 1192 memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats)); 1193 1194 /* async_handlers_wk is now blocked */ 1195 1196 /* 1197 * The work item could be running or queued if the 1198 * ROC time event stops just as we get here. 1199 */ 1200 flush_work(&mvm->roc_done_wk); 1201 1202 iwl_mvm_stop_device(mvm); 1203 1204 iwl_mvm_async_handlers_purge(mvm); 1205 /* async_handlers_list is empty and will stay empty: HW is stopped */ 1206 1207 /* the fw is stopped, the aux sta is dead: clean up driver state */ 1208 iwl_mvm_del_aux_sta(mvm); 1209 1210 /* 1211 * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete() 1212 * won't be called in this case). 1213 * But make sure to cleanup interfaces that have gone down before/during 1214 * HW restart was requested. 1215 */ 1216 if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1217 ieee80211_iterate_interfaces(mvm->hw, 0, 1218 iwl_mvm_cleanup_iterator, mvm); 1219 1220 /* We shouldn't have any UIDs still set. Loop over all the UIDs to 1221 * make sure there's nothing left there and warn if any is found. 1222 */ 1223 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1224 int i; 1225 1226 for (i = 0; i < mvm->max_scans; i++) { 1227 if (WARN_ONCE(mvm->scan_uid_status[i], 1228 "UMAC scan UID %d status was not cleaned\n", 1229 i)) 1230 mvm->scan_uid_status[i] = 0; 1231 } 1232 } 1233 } 1234 1235 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw) 1236 { 1237 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1238 1239 flush_work(&mvm->d0i3_exit_work); 1240 flush_work(&mvm->async_handlers_wk); 1241 flush_work(&mvm->add_stream_wk); 1242 1243 /* 1244 * Lock and clear the firmware running bit here already, so that 1245 * new commands coming in elsewhere, e.g. from debugfs, will not 1246 * be able to proceed. This is important here because one of those 1247 * debugfs files causes the firmware dump to be triggered, and if we 1248 * don't stop debugfs accesses before canceling that it could be 1249 * retriggered after we flush it but before we've cleared the bit. 1250 */ 1251 clear_bit(IWL_MVM_STATUS_FIRMWARE_RUNNING, &mvm->status); 1252 1253 iwl_fw_cancel_dump(&mvm->fwrt); 1254 cancel_delayed_work_sync(&mvm->cs_tx_unblock_dwork); 1255 cancel_delayed_work_sync(&mvm->scan_timeout_dwork); 1256 iwl_fw_free_dump_desc(&mvm->fwrt); 1257 1258 mutex_lock(&mvm->mutex); 1259 __iwl_mvm_mac_stop(mvm); 1260 mutex_unlock(&mvm->mutex); 1261 1262 /* 1263 * The worker might have been waiting for the mutex, let it run and 1264 * discover that its list is now empty. 1265 */ 1266 cancel_work_sync(&mvm->async_handlers_wk); 1267 } 1268 1269 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm) 1270 { 1271 u16 i; 1272 1273 lockdep_assert_held(&mvm->mutex); 1274 1275 for (i = 0; i < NUM_PHY_CTX; i++) 1276 if (!mvm->phy_ctxts[i].ref) 1277 return &mvm->phy_ctxts[i]; 1278 1279 IWL_ERR(mvm, "No available PHY context\n"); 1280 return NULL; 1281 } 1282 1283 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1284 s16 tx_power) 1285 { 1286 struct iwl_dev_tx_power_cmd cmd = { 1287 .v3.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC), 1288 .v3.mac_context_id = 1289 cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id), 1290 .v3.pwr_restriction = cpu_to_le16(8 * tx_power), 1291 }; 1292 int len = sizeof(cmd); 1293 1294 if (tx_power == IWL_DEFAULT_MAX_TX_POWER) 1295 cmd.v3.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER); 1296 1297 if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_TX_POWER_ACK)) 1298 len = sizeof(cmd.v3); 1299 1300 return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd); 1301 } 1302 1303 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw, 1304 struct ieee80211_vif *vif) 1305 { 1306 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1307 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1308 int ret; 1309 1310 mvmvif->mvm = mvm; 1311 1312 /* 1313 * make sure D0i3 exit is completed, otherwise a target access 1314 * during tx queue configuration could be done when still in 1315 * D0i3 state. 1316 */ 1317 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF); 1318 if (ret) 1319 return ret; 1320 1321 /* 1322 * Not much to do here. The stack will not allow interface 1323 * types or combinations that we didn't advertise, so we 1324 * don't really have to check the types. 1325 */ 1326 1327 mutex_lock(&mvm->mutex); 1328 1329 /* make sure that beacon statistics don't go backwards with FW reset */ 1330 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 1331 mvmvif->beacon_stats.accu_num_beacons += 1332 mvmvif->beacon_stats.num_beacons; 1333 1334 /* Allocate resources for the MAC context, and add it to the fw */ 1335 ret = iwl_mvm_mac_ctxt_init(mvm, vif); 1336 if (ret) 1337 goto out_unlock; 1338 1339 /* Counting number of interfaces is needed for legacy PM */ 1340 if (vif->type != NL80211_IFTYPE_P2P_DEVICE) 1341 mvm->vif_count++; 1342 1343 /* 1344 * The AP binding flow can be done only after the beacon 1345 * template is configured (which happens only in the mac80211 1346 * start_ap() flow), and adding the broadcast station can happen 1347 * only after the binding. 1348 * In addition, since modifying the MAC before adding a bcast 1349 * station is not allowed by the FW, delay the adding of MAC context to 1350 * the point where we can also add the bcast station. 1351 * In short: there's not much we can do at this point, other than 1352 * allocating resources :) 1353 */ 1354 if (vif->type == NL80211_IFTYPE_AP || 1355 vif->type == NL80211_IFTYPE_ADHOC) { 1356 ret = iwl_mvm_alloc_bcast_sta(mvm, vif); 1357 if (ret) { 1358 IWL_ERR(mvm, "Failed to allocate bcast sta\n"); 1359 goto out_release; 1360 } 1361 1362 /* 1363 * Only queue for this station is the mcast queue, 1364 * which shouldn't be in TFD mask anyway 1365 */ 1366 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->mcast_sta, 1367 0, vif->type, 1368 IWL_STA_MULTICAST); 1369 if (ret) 1370 goto out_release; 1371 1372 iwl_mvm_vif_dbgfs_register(mvm, vif); 1373 goto out_unlock; 1374 } 1375 1376 mvmvif->features |= hw->netdev_features; 1377 1378 ret = iwl_mvm_mac_ctxt_add(mvm, vif); 1379 if (ret) 1380 goto out_release; 1381 1382 ret = iwl_mvm_power_update_mac(mvm); 1383 if (ret) 1384 goto out_remove_mac; 1385 1386 /* beacon filtering */ 1387 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0); 1388 if (ret) 1389 goto out_remove_mac; 1390 1391 if (!mvm->bf_allowed_vif && 1392 vif->type == NL80211_IFTYPE_STATION && !vif->p2p) { 1393 mvm->bf_allowed_vif = mvmvif; 1394 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER | 1395 IEEE80211_VIF_SUPPORTS_CQM_RSSI; 1396 } 1397 1398 /* 1399 * P2P_DEVICE interface does not have a channel context assigned to it, 1400 * so a dedicated PHY context is allocated to it and the corresponding 1401 * MAC context is bound to it at this stage. 1402 */ 1403 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 1404 1405 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm); 1406 if (!mvmvif->phy_ctxt) { 1407 ret = -ENOSPC; 1408 goto out_free_bf; 1409 } 1410 1411 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt); 1412 ret = iwl_mvm_binding_add_vif(mvm, vif); 1413 if (ret) 1414 goto out_unref_phy; 1415 1416 ret = iwl_mvm_add_p2p_bcast_sta(mvm, vif); 1417 if (ret) 1418 goto out_unbind; 1419 1420 /* Save a pointer to p2p device vif, so it can later be used to 1421 * update the p2p device MAC when a GO is started/stopped */ 1422 mvm->p2p_device_vif = vif; 1423 } 1424 1425 if (vif->type == NL80211_IFTYPE_MONITOR) 1426 mvm->monitor_on = true; 1427 1428 iwl_mvm_vif_dbgfs_register(mvm, vif); 1429 goto out_unlock; 1430 1431 out_unbind: 1432 iwl_mvm_binding_remove_vif(mvm, vif); 1433 out_unref_phy: 1434 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt); 1435 out_free_bf: 1436 if (mvm->bf_allowed_vif == mvmvif) { 1437 mvm->bf_allowed_vif = NULL; 1438 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER | 1439 IEEE80211_VIF_SUPPORTS_CQM_RSSI); 1440 } 1441 out_remove_mac: 1442 mvmvif->phy_ctxt = NULL; 1443 iwl_mvm_mac_ctxt_remove(mvm, vif); 1444 out_release: 1445 if (vif->type != NL80211_IFTYPE_P2P_DEVICE) 1446 mvm->vif_count--; 1447 out_unlock: 1448 mutex_unlock(&mvm->mutex); 1449 1450 iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF); 1451 1452 return ret; 1453 } 1454 1455 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm, 1456 struct ieee80211_vif *vif) 1457 { 1458 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 1459 /* 1460 * Flush the ROC worker which will flush the OFFCHANNEL queue. 1461 * We assume here that all the packets sent to the OFFCHANNEL 1462 * queue are sent in ROC session. 1463 */ 1464 flush_work(&mvm->roc_done_wk); 1465 } 1466 } 1467 1468 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw, 1469 struct ieee80211_vif *vif) 1470 { 1471 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1472 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1473 1474 iwl_mvm_prepare_mac_removal(mvm, vif); 1475 1476 mutex_lock(&mvm->mutex); 1477 1478 if (mvm->bf_allowed_vif == mvmvif) { 1479 mvm->bf_allowed_vif = NULL; 1480 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER | 1481 IEEE80211_VIF_SUPPORTS_CQM_RSSI); 1482 } 1483 1484 iwl_mvm_vif_dbgfs_clean(mvm, vif); 1485 1486 /* 1487 * For AP/GO interface, the tear down of the resources allocated to the 1488 * interface is be handled as part of the stop_ap flow. 1489 */ 1490 if (vif->type == NL80211_IFTYPE_AP || 1491 vif->type == NL80211_IFTYPE_ADHOC) { 1492 #ifdef CONFIG_NL80211_TESTMODE 1493 if (vif == mvm->noa_vif) { 1494 mvm->noa_vif = NULL; 1495 mvm->noa_duration = 0; 1496 } 1497 #endif 1498 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->mcast_sta); 1499 iwl_mvm_dealloc_bcast_sta(mvm, vif); 1500 goto out_release; 1501 } 1502 1503 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 1504 mvm->p2p_device_vif = NULL; 1505 iwl_mvm_rm_p2p_bcast_sta(mvm, vif); 1506 iwl_mvm_binding_remove_vif(mvm, vif); 1507 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt); 1508 mvmvif->phy_ctxt = NULL; 1509 } 1510 1511 if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE) 1512 mvm->vif_count--; 1513 1514 iwl_mvm_power_update_mac(mvm); 1515 iwl_mvm_mac_ctxt_remove(mvm, vif); 1516 1517 if (vif->type == NL80211_IFTYPE_MONITOR) 1518 mvm->monitor_on = false; 1519 1520 out_release: 1521 mutex_unlock(&mvm->mutex); 1522 } 1523 1524 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed) 1525 { 1526 return 0; 1527 } 1528 1529 struct iwl_mvm_mc_iter_data { 1530 struct iwl_mvm *mvm; 1531 int port_id; 1532 }; 1533 1534 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac, 1535 struct ieee80211_vif *vif) 1536 { 1537 struct iwl_mvm_mc_iter_data *data = _data; 1538 struct iwl_mvm *mvm = data->mvm; 1539 struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd; 1540 struct iwl_host_cmd hcmd = { 1541 .id = MCAST_FILTER_CMD, 1542 .flags = CMD_ASYNC, 1543 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 1544 }; 1545 int ret, len; 1546 1547 /* if we don't have free ports, mcast frames will be dropped */ 1548 if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM)) 1549 return; 1550 1551 if (vif->type != NL80211_IFTYPE_STATION || 1552 !vif->bss_conf.assoc) 1553 return; 1554 1555 cmd->port_id = data->port_id++; 1556 memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN); 1557 len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4); 1558 1559 hcmd.len[0] = len; 1560 hcmd.data[0] = cmd; 1561 1562 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1563 if (ret) 1564 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret); 1565 } 1566 1567 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm) 1568 { 1569 struct iwl_mvm_mc_iter_data iter_data = { 1570 .mvm = mvm, 1571 }; 1572 1573 lockdep_assert_held(&mvm->mutex); 1574 1575 if (WARN_ON_ONCE(!mvm->mcast_filter_cmd)) 1576 return; 1577 1578 ieee80211_iterate_active_interfaces_atomic( 1579 mvm->hw, IEEE80211_IFACE_ITER_NORMAL, 1580 iwl_mvm_mc_iface_iterator, &iter_data); 1581 } 1582 1583 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw, 1584 struct netdev_hw_addr_list *mc_list) 1585 { 1586 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1587 struct iwl_mcast_filter_cmd *cmd; 1588 struct netdev_hw_addr *addr; 1589 int addr_count; 1590 bool pass_all; 1591 int len; 1592 1593 addr_count = netdev_hw_addr_list_count(mc_list); 1594 pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES || 1595 IWL_MVM_FW_MCAST_FILTER_PASS_ALL; 1596 if (pass_all) 1597 addr_count = 0; 1598 1599 len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4); 1600 cmd = kzalloc(len, GFP_ATOMIC); 1601 if (!cmd) 1602 return 0; 1603 1604 if (pass_all) { 1605 cmd->pass_all = 1; 1606 return (u64)(unsigned long)cmd; 1607 } 1608 1609 netdev_hw_addr_list_for_each(addr, mc_list) { 1610 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n", 1611 cmd->count, addr->addr); 1612 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN], 1613 addr->addr, ETH_ALEN); 1614 cmd->count++; 1615 } 1616 1617 return (u64)(unsigned long)cmd; 1618 } 1619 1620 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw, 1621 unsigned int changed_flags, 1622 unsigned int *total_flags, 1623 u64 multicast) 1624 { 1625 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1626 struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast; 1627 1628 mutex_lock(&mvm->mutex); 1629 1630 /* replace previous configuration */ 1631 kfree(mvm->mcast_filter_cmd); 1632 mvm->mcast_filter_cmd = cmd; 1633 1634 if (!cmd) 1635 goto out; 1636 1637 if (changed_flags & FIF_ALLMULTI) 1638 cmd->pass_all = !!(*total_flags & FIF_ALLMULTI); 1639 1640 if (cmd->pass_all) 1641 cmd->count = 0; 1642 1643 iwl_mvm_recalc_multicast(mvm); 1644 out: 1645 mutex_unlock(&mvm->mutex); 1646 *total_flags = 0; 1647 } 1648 1649 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw, 1650 struct ieee80211_vif *vif, 1651 unsigned int filter_flags, 1652 unsigned int changed_flags) 1653 { 1654 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1655 1656 /* We support only filter for probe requests */ 1657 if (!(changed_flags & FIF_PROBE_REQ)) 1658 return; 1659 1660 /* Supported only for p2p client interfaces */ 1661 if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc || 1662 !vif->p2p) 1663 return; 1664 1665 mutex_lock(&mvm->mutex); 1666 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL); 1667 mutex_unlock(&mvm->mutex); 1668 } 1669 1670 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING 1671 struct iwl_bcast_iter_data { 1672 struct iwl_mvm *mvm; 1673 struct iwl_bcast_filter_cmd *cmd; 1674 u8 current_filter; 1675 }; 1676 1677 static void 1678 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif, 1679 const struct iwl_fw_bcast_filter *in_filter, 1680 struct iwl_fw_bcast_filter *out_filter) 1681 { 1682 struct iwl_fw_bcast_filter_attr *attr; 1683 int i; 1684 1685 memcpy(out_filter, in_filter, sizeof(*out_filter)); 1686 1687 for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) { 1688 attr = &out_filter->attrs[i]; 1689 1690 if (!attr->mask) 1691 break; 1692 1693 switch (attr->reserved1) { 1694 case cpu_to_le16(BC_FILTER_MAGIC_IP): 1695 if (vif->bss_conf.arp_addr_cnt != 1) { 1696 attr->mask = 0; 1697 continue; 1698 } 1699 1700 attr->val = vif->bss_conf.arp_addr_list[0]; 1701 break; 1702 case cpu_to_le16(BC_FILTER_MAGIC_MAC): 1703 attr->val = *(__be32 *)&vif->addr[2]; 1704 break; 1705 default: 1706 break; 1707 } 1708 attr->reserved1 = 0; 1709 out_filter->num_attrs++; 1710 } 1711 } 1712 1713 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac, 1714 struct ieee80211_vif *vif) 1715 { 1716 struct iwl_bcast_iter_data *data = _data; 1717 struct iwl_mvm *mvm = data->mvm; 1718 struct iwl_bcast_filter_cmd *cmd = data->cmd; 1719 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1720 struct iwl_fw_bcast_mac *bcast_mac; 1721 int i; 1722 1723 if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs))) 1724 return; 1725 1726 bcast_mac = &cmd->macs[mvmvif->id]; 1727 1728 /* 1729 * enable filtering only for associated stations, but not for P2P 1730 * Clients 1731 */ 1732 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p || 1733 !vif->bss_conf.assoc) 1734 return; 1735 1736 bcast_mac->default_discard = 1; 1737 1738 /* copy all configured filters */ 1739 for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) { 1740 /* 1741 * Make sure we don't exceed our filters limit. 1742 * if there is still a valid filter to be configured, 1743 * be on the safe side and just allow bcast for this mac. 1744 */ 1745 if (WARN_ON_ONCE(data->current_filter >= 1746 ARRAY_SIZE(cmd->filters))) { 1747 bcast_mac->default_discard = 0; 1748 bcast_mac->attached_filters = 0; 1749 break; 1750 } 1751 1752 iwl_mvm_set_bcast_filter(vif, 1753 &mvm->bcast_filters[i], 1754 &cmd->filters[data->current_filter]); 1755 1756 /* skip current filter if it contains no attributes */ 1757 if (!cmd->filters[data->current_filter].num_attrs) 1758 continue; 1759 1760 /* attach the filter to current mac */ 1761 bcast_mac->attached_filters |= 1762 cpu_to_le16(BIT(data->current_filter)); 1763 1764 data->current_filter++; 1765 } 1766 } 1767 1768 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm, 1769 struct iwl_bcast_filter_cmd *cmd) 1770 { 1771 struct iwl_bcast_iter_data iter_data = { 1772 .mvm = mvm, 1773 .cmd = cmd, 1774 }; 1775 1776 if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL) 1777 return false; 1778 1779 memset(cmd, 0, sizeof(*cmd)); 1780 cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters); 1781 cmd->max_macs = ARRAY_SIZE(cmd->macs); 1782 1783 #ifdef CONFIG_IWLWIFI_DEBUGFS 1784 /* use debugfs filters/macs if override is configured */ 1785 if (mvm->dbgfs_bcast_filtering.override) { 1786 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters, 1787 sizeof(cmd->filters)); 1788 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs, 1789 sizeof(cmd->macs)); 1790 return true; 1791 } 1792 #endif 1793 1794 /* if no filters are configured, do nothing */ 1795 if (!mvm->bcast_filters) 1796 return false; 1797 1798 /* configure and attach these filters for each associated sta vif */ 1799 ieee80211_iterate_active_interfaces( 1800 mvm->hw, IEEE80211_IFACE_ITER_NORMAL, 1801 iwl_mvm_bcast_filter_iterator, &iter_data); 1802 1803 return true; 1804 } 1805 1806 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm) 1807 { 1808 struct iwl_bcast_filter_cmd cmd; 1809 1810 if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING)) 1811 return 0; 1812 1813 if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd)) 1814 return 0; 1815 1816 return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0, 1817 sizeof(cmd), &cmd); 1818 } 1819 #else 1820 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm) 1821 { 1822 return 0; 1823 } 1824 #endif 1825 1826 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm, 1827 struct ieee80211_vif *vif) 1828 { 1829 struct iwl_mu_group_mgmt_cmd cmd = {}; 1830 1831 memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership, 1832 WLAN_MEMBERSHIP_LEN); 1833 memcpy(cmd.user_position, vif->bss_conf.mu_group.position, 1834 WLAN_USER_POSITION_LEN); 1835 1836 return iwl_mvm_send_cmd_pdu(mvm, 1837 WIDE_ID(DATA_PATH_GROUP, 1838 UPDATE_MU_GROUPS_CMD), 1839 0, sizeof(cmd), &cmd); 1840 } 1841 1842 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac, 1843 struct ieee80211_vif *vif) 1844 { 1845 if (vif->mu_mimo_owner) { 1846 struct iwl_mu_group_mgmt_notif *notif = _data; 1847 1848 /* 1849 * MU-MIMO Group Id action frame is little endian. We treat 1850 * the data received from firmware as if it came from the 1851 * action frame, so no conversion is needed. 1852 */ 1853 ieee80211_update_mu_groups(vif, 1854 (u8 *)¬if->membership_status, 1855 (u8 *)¬if->user_position); 1856 } 1857 } 1858 1859 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm, 1860 struct iwl_rx_cmd_buffer *rxb) 1861 { 1862 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1863 struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data; 1864 1865 ieee80211_iterate_active_interfaces_atomic( 1866 mvm->hw, IEEE80211_IFACE_ITER_NORMAL, 1867 iwl_mvm_mu_mimo_iface_iterator, notif); 1868 } 1869 1870 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm, 1871 struct ieee80211_vif *vif, 1872 struct ieee80211_bss_conf *bss_conf, 1873 u32 changes) 1874 { 1875 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1876 int ret; 1877 1878 /* 1879 * Re-calculate the tsf id, as the master-slave relations depend on the 1880 * beacon interval, which was not known when the station interface was 1881 * added. 1882 */ 1883 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) 1884 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif); 1885 1886 /* 1887 * If we're not associated yet, take the (new) BSSID before associating 1888 * so the firmware knows. If we're already associated, then use the old 1889 * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC 1890 * branch for disassociation below. 1891 */ 1892 if (changes & BSS_CHANGED_BSSID && !mvmvif->associated) 1893 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN); 1894 1895 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid); 1896 if (ret) 1897 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr); 1898 1899 /* after sending it once, adopt mac80211 data */ 1900 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN); 1901 mvmvif->associated = bss_conf->assoc; 1902 1903 if (changes & BSS_CHANGED_ASSOC) { 1904 if (bss_conf->assoc) { 1905 /* clear statistics to get clean beacon counter */ 1906 iwl_mvm_request_statistics(mvm, true); 1907 memset(&mvmvif->beacon_stats, 0, 1908 sizeof(mvmvif->beacon_stats)); 1909 1910 /* add quota for this interface */ 1911 ret = iwl_mvm_update_quotas(mvm, true, NULL); 1912 if (ret) { 1913 IWL_ERR(mvm, "failed to update quotas\n"); 1914 return; 1915 } 1916 1917 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, 1918 &mvm->status)) { 1919 /* 1920 * If we're restarting then the firmware will 1921 * obviously have lost synchronisation with 1922 * the AP. It will attempt to synchronise by 1923 * itself, but we can make it more reliable by 1924 * scheduling a session protection time event. 1925 * 1926 * The firmware needs to receive a beacon to 1927 * catch up with synchronisation, use 110% of 1928 * the beacon interval. 1929 * 1930 * Set a large maximum delay to allow for more 1931 * than a single interface. 1932 */ 1933 u32 dur = (11 * vif->bss_conf.beacon_int) / 10; 1934 iwl_mvm_protect_session(mvm, vif, dur, dur, 1935 5 * dur, false); 1936 } 1937 1938 iwl_mvm_sf_update(mvm, vif, false); 1939 iwl_mvm_power_vif_assoc(mvm, vif); 1940 if (vif->p2p) { 1941 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT); 1942 iwl_mvm_update_smps(mvm, vif, 1943 IWL_MVM_SMPS_REQ_PROT, 1944 IEEE80211_SMPS_DYNAMIC); 1945 } 1946 } else if (mvmvif->ap_sta_id != IWL_MVM_INVALID_STA) { 1947 /* 1948 * If update fails - SF might be running in associated 1949 * mode while disassociated - which is forbidden. 1950 */ 1951 WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false), 1952 "Failed to update SF upon disassociation\n"); 1953 1954 /* 1955 * If we get an assert during the connection (after the 1956 * station has been added, but before the vif is set 1957 * to associated), mac80211 will re-add the station and 1958 * then configure the vif. Since the vif is not 1959 * associated, we would remove the station here and 1960 * this would fail the recovery. 1961 */ 1962 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, 1963 &mvm->status)) { 1964 /* 1965 * Remove AP station now that 1966 * the MAC is unassoc 1967 */ 1968 ret = iwl_mvm_rm_sta_id(mvm, vif, 1969 mvmvif->ap_sta_id); 1970 if (ret) 1971 IWL_ERR(mvm, 1972 "failed to remove AP station\n"); 1973 1974 if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id) 1975 mvm->d0i3_ap_sta_id = 1976 IWL_MVM_INVALID_STA; 1977 mvmvif->ap_sta_id = IWL_MVM_INVALID_STA; 1978 } 1979 1980 /* remove quota for this interface */ 1981 ret = iwl_mvm_update_quotas(mvm, false, NULL); 1982 if (ret) 1983 IWL_ERR(mvm, "failed to update quotas\n"); 1984 1985 if (vif->p2p) 1986 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT); 1987 1988 /* this will take the cleared BSSID from bss_conf */ 1989 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL); 1990 if (ret) 1991 IWL_ERR(mvm, 1992 "failed to update MAC %pM (clear after unassoc)\n", 1993 vif->addr); 1994 } 1995 1996 /* 1997 * The firmware tracks the MU-MIMO group on its own. 1998 * However, on HW restart we should restore this data. 1999 */ 2000 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 2001 (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) { 2002 ret = iwl_mvm_update_mu_groups(mvm, vif); 2003 if (ret) 2004 IWL_ERR(mvm, 2005 "failed to update VHT MU_MIMO groups\n"); 2006 } 2007 2008 iwl_mvm_recalc_multicast(mvm); 2009 iwl_mvm_configure_bcast_filter(mvm); 2010 2011 /* reset rssi values */ 2012 mvmvif->bf_data.ave_beacon_signal = 0; 2013 2014 iwl_mvm_bt_coex_vif_change(mvm); 2015 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT, 2016 IEEE80211_SMPS_AUTOMATIC); 2017 if (fw_has_capa(&mvm->fw->ucode_capa, 2018 IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 2019 iwl_mvm_config_scan(mvm); 2020 } 2021 2022 if (changes & BSS_CHANGED_BEACON_INFO) { 2023 /* 2024 * We received a beacon from the associated AP so 2025 * remove the session protection. 2026 */ 2027 iwl_mvm_stop_session_protection(mvm, vif); 2028 2029 iwl_mvm_sf_update(mvm, vif, false); 2030 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0)); 2031 } 2032 2033 if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS | 2034 /* 2035 * Send power command on every beacon change, 2036 * because we may have not enabled beacon abort yet. 2037 */ 2038 BSS_CHANGED_BEACON_INFO)) { 2039 ret = iwl_mvm_power_update_mac(mvm); 2040 if (ret) 2041 IWL_ERR(mvm, "failed to update power mode\n"); 2042 } 2043 2044 if (changes & BSS_CHANGED_TXPOWER) { 2045 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n", 2046 bss_conf->txpower); 2047 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower); 2048 } 2049 2050 if (changes & BSS_CHANGED_CQM) { 2051 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n"); 2052 /* reset cqm events tracking */ 2053 mvmvif->bf_data.last_cqm_event = 0; 2054 if (mvmvif->bf_data.bf_enabled) { 2055 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0); 2056 if (ret) 2057 IWL_ERR(mvm, 2058 "failed to update CQM thresholds\n"); 2059 } 2060 } 2061 2062 if (changes & BSS_CHANGED_ARP_FILTER) { 2063 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n"); 2064 iwl_mvm_configure_bcast_filter(mvm); 2065 } 2066 } 2067 2068 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw, 2069 struct ieee80211_vif *vif) 2070 { 2071 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2072 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2073 int ret; 2074 2075 /* 2076 * iwl_mvm_mac_ctxt_add() might read directly from the device 2077 * (the system time), so make sure it is available. 2078 */ 2079 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP); 2080 if (ret) 2081 return ret; 2082 2083 mutex_lock(&mvm->mutex); 2084 2085 /* Send the beacon template */ 2086 ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif); 2087 if (ret) 2088 goto out_unlock; 2089 2090 /* 2091 * Re-calculate the tsf id, as the master-slave relations depend on the 2092 * beacon interval, which was not known when the AP interface was added. 2093 */ 2094 if (vif->type == NL80211_IFTYPE_AP) 2095 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif); 2096 2097 mvmvif->ap_assoc_sta_count = 0; 2098 2099 /* Add the mac context */ 2100 ret = iwl_mvm_mac_ctxt_add(mvm, vif); 2101 if (ret) 2102 goto out_unlock; 2103 2104 /* Perform the binding */ 2105 ret = iwl_mvm_binding_add_vif(mvm, vif); 2106 if (ret) 2107 goto out_remove; 2108 2109 ret = iwl_mvm_add_mcast_sta(mvm, vif); 2110 if (ret) 2111 goto out_unbind; 2112 2113 /* Send the bcast station. At this stage the TBTT and DTIM time events 2114 * are added and applied to the scheduler */ 2115 ret = iwl_mvm_send_add_bcast_sta(mvm, vif); 2116 if (ret) 2117 goto out_rm_mcast; 2118 2119 /* must be set before quota calculations */ 2120 mvmvif->ap_ibss_active = true; 2121 2122 /* power updated needs to be done before quotas */ 2123 iwl_mvm_power_update_mac(mvm); 2124 2125 ret = iwl_mvm_update_quotas(mvm, false, NULL); 2126 if (ret) 2127 goto out_quota_failed; 2128 2129 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */ 2130 if (vif->p2p && mvm->p2p_device_vif) 2131 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL); 2132 2133 iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS); 2134 2135 iwl_mvm_bt_coex_vif_change(mvm); 2136 2137 /* we don't support TDLS during DCM */ 2138 if (iwl_mvm_phy_ctx_count(mvm) > 1) 2139 iwl_mvm_teardown_tdls_peers(mvm); 2140 2141 goto out_unlock; 2142 2143 out_quota_failed: 2144 iwl_mvm_power_update_mac(mvm); 2145 mvmvif->ap_ibss_active = false; 2146 iwl_mvm_send_rm_bcast_sta(mvm, vif); 2147 out_rm_mcast: 2148 iwl_mvm_rm_mcast_sta(mvm, vif); 2149 out_unbind: 2150 iwl_mvm_binding_remove_vif(mvm, vif); 2151 out_remove: 2152 iwl_mvm_mac_ctxt_remove(mvm, vif); 2153 out_unlock: 2154 mutex_unlock(&mvm->mutex); 2155 iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP); 2156 return ret; 2157 } 2158 2159 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw, 2160 struct ieee80211_vif *vif) 2161 { 2162 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2163 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2164 2165 iwl_mvm_prepare_mac_removal(mvm, vif); 2166 2167 mutex_lock(&mvm->mutex); 2168 2169 /* Handle AP stop while in CSA */ 2170 if (rcu_access_pointer(mvm->csa_vif) == vif) { 2171 iwl_mvm_remove_time_event(mvm, mvmvif, 2172 &mvmvif->time_event_data); 2173 RCU_INIT_POINTER(mvm->csa_vif, NULL); 2174 mvmvif->csa_countdown = false; 2175 } 2176 2177 if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) { 2178 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL); 2179 mvm->csa_tx_block_bcn_timeout = 0; 2180 } 2181 2182 mvmvif->ap_ibss_active = false; 2183 mvm->ap_last_beacon_gp2 = 0; 2184 2185 iwl_mvm_bt_coex_vif_change(mvm); 2186 2187 iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS); 2188 2189 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */ 2190 if (vif->p2p && mvm->p2p_device_vif) 2191 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL); 2192 2193 iwl_mvm_update_quotas(mvm, false, NULL); 2194 2195 /* 2196 * This is not very nice, but the simplest: 2197 * For older FWs removing the mcast sta before the bcast station may 2198 * cause assert 0x2b00. 2199 * This is fixed in later FW (which will stop beaconing when removing 2200 * bcast station). 2201 * So make the order of removal depend on the TLV 2202 */ 2203 if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 2204 iwl_mvm_rm_mcast_sta(mvm, vif); 2205 iwl_mvm_send_rm_bcast_sta(mvm, vif); 2206 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_STA_TYPE)) 2207 iwl_mvm_rm_mcast_sta(mvm, vif); 2208 iwl_mvm_binding_remove_vif(mvm, vif); 2209 2210 iwl_mvm_power_update_mac(mvm); 2211 2212 iwl_mvm_mac_ctxt_remove(mvm, vif); 2213 2214 mutex_unlock(&mvm->mutex); 2215 } 2216 2217 static void 2218 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm, 2219 struct ieee80211_vif *vif, 2220 struct ieee80211_bss_conf *bss_conf, 2221 u32 changes) 2222 { 2223 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2224 2225 /* Changes will be applied when the AP/IBSS is started */ 2226 if (!mvmvif->ap_ibss_active) 2227 return; 2228 2229 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT | 2230 BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) && 2231 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL)) 2232 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr); 2233 2234 /* Need to send a new beacon template to the FW */ 2235 if (changes & BSS_CHANGED_BEACON && 2236 iwl_mvm_mac_ctxt_beacon_changed(mvm, vif)) 2237 IWL_WARN(mvm, "Failed updating beacon data\n"); 2238 2239 if (changes & BSS_CHANGED_TXPOWER) { 2240 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n", 2241 bss_conf->txpower); 2242 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower); 2243 } 2244 } 2245 2246 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw, 2247 struct ieee80211_vif *vif, 2248 struct ieee80211_bss_conf *bss_conf, 2249 u32 changes) 2250 { 2251 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2252 2253 /* 2254 * iwl_mvm_bss_info_changed_station() might call 2255 * iwl_mvm_protect_session(), which reads directly from 2256 * the device (the system time), so make sure it is available. 2257 */ 2258 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED)) 2259 return; 2260 2261 mutex_lock(&mvm->mutex); 2262 2263 if (changes & BSS_CHANGED_IDLE && !bss_conf->idle) 2264 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 2265 2266 switch (vif->type) { 2267 case NL80211_IFTYPE_STATION: 2268 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes); 2269 break; 2270 case NL80211_IFTYPE_AP: 2271 case NL80211_IFTYPE_ADHOC: 2272 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes); 2273 break; 2274 case NL80211_IFTYPE_MONITOR: 2275 if (changes & BSS_CHANGED_MU_GROUPS) 2276 iwl_mvm_update_mu_groups(mvm, vif); 2277 break; 2278 default: 2279 /* shouldn't happen */ 2280 WARN_ON_ONCE(1); 2281 } 2282 2283 mutex_unlock(&mvm->mutex); 2284 iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED); 2285 } 2286 2287 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw, 2288 struct ieee80211_vif *vif, 2289 struct ieee80211_scan_request *hw_req) 2290 { 2291 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2292 int ret; 2293 2294 if (hw_req->req.n_channels == 0 || 2295 hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels) 2296 return -EINVAL; 2297 2298 mutex_lock(&mvm->mutex); 2299 ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies); 2300 mutex_unlock(&mvm->mutex); 2301 2302 return ret; 2303 } 2304 2305 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw, 2306 struct ieee80211_vif *vif) 2307 { 2308 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2309 2310 mutex_lock(&mvm->mutex); 2311 2312 /* Due to a race condition, it's possible that mac80211 asks 2313 * us to stop a hw_scan when it's already stopped. This can 2314 * happen, for instance, if we stopped the scan ourselves, 2315 * called ieee80211_scan_completed() and the userspace called 2316 * cancel scan scan before ieee80211_scan_work() could run. 2317 * To handle that, simply return if the scan is not running. 2318 */ 2319 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) 2320 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 2321 2322 mutex_unlock(&mvm->mutex); 2323 } 2324 2325 static void 2326 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw, 2327 struct ieee80211_sta *sta, u16 tids, 2328 int num_frames, 2329 enum ieee80211_frame_release_type reason, 2330 bool more_data) 2331 { 2332 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2333 2334 /* Called when we need to transmit (a) frame(s) from mac80211 */ 2335 2336 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames, 2337 tids, more_data, false); 2338 } 2339 2340 static void 2341 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw, 2342 struct ieee80211_sta *sta, u16 tids, 2343 int num_frames, 2344 enum ieee80211_frame_release_type reason, 2345 bool more_data) 2346 { 2347 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2348 2349 /* Called when we need to transmit (a) frame(s) from agg or dqa queue */ 2350 2351 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames, 2352 tids, more_data, true); 2353 } 2354 2355 static void __iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw, 2356 enum sta_notify_cmd cmd, 2357 struct ieee80211_sta *sta) 2358 { 2359 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2360 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 2361 unsigned long txqs = 0, tids = 0; 2362 int tid; 2363 2364 /* 2365 * If we have TVQM then we get too high queue numbers - luckily 2366 * we really shouldn't get here with that because such hardware 2367 * should have firmware supporting buffer station offload. 2368 */ 2369 if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) 2370 return; 2371 2372 spin_lock_bh(&mvmsta->lock); 2373 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) { 2374 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; 2375 2376 if (tid_data->txq_id == IWL_MVM_INVALID_QUEUE) 2377 continue; 2378 2379 __set_bit(tid_data->txq_id, &txqs); 2380 2381 if (iwl_mvm_tid_queued(mvm, tid_data) == 0) 2382 continue; 2383 2384 __set_bit(tid, &tids); 2385 } 2386 2387 switch (cmd) { 2388 case STA_NOTIFY_SLEEP: 2389 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT) 2390 ieee80211_sta_set_buffered(sta, tid, true); 2391 2392 if (txqs) 2393 iwl_trans_freeze_txq_timer(mvm->trans, txqs, true); 2394 /* 2395 * The fw updates the STA to be asleep. Tx packets on the Tx 2396 * queues to this station will not be transmitted. The fw will 2397 * send a Tx response with TX_STATUS_FAIL_DEST_PS. 2398 */ 2399 break; 2400 case STA_NOTIFY_AWAKE: 2401 if (WARN_ON(mvmsta->sta_id == IWL_MVM_INVALID_STA)) 2402 break; 2403 2404 if (txqs) 2405 iwl_trans_freeze_txq_timer(mvm->trans, txqs, false); 2406 iwl_mvm_sta_modify_ps_wake(mvm, sta); 2407 break; 2408 default: 2409 break; 2410 } 2411 spin_unlock_bh(&mvmsta->lock); 2412 } 2413 2414 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw, 2415 struct ieee80211_vif *vif, 2416 enum sta_notify_cmd cmd, 2417 struct ieee80211_sta *sta) 2418 { 2419 __iwl_mvm_mac_sta_notify(hw, cmd, sta); 2420 } 2421 2422 void iwl_mvm_sta_pm_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) 2423 { 2424 struct iwl_rx_packet *pkt = rxb_addr(rxb); 2425 struct iwl_mvm_pm_state_notification *notif = (void *)pkt->data; 2426 struct ieee80211_sta *sta; 2427 struct iwl_mvm_sta *mvmsta; 2428 bool sleeping = (notif->type != IWL_MVM_PM_EVENT_AWAKE); 2429 2430 if (WARN_ON(notif->sta_id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))) 2431 return; 2432 2433 rcu_read_lock(); 2434 sta = rcu_dereference(mvm->fw_id_to_mac_id[notif->sta_id]); 2435 if (WARN_ON(IS_ERR_OR_NULL(sta))) { 2436 rcu_read_unlock(); 2437 return; 2438 } 2439 2440 mvmsta = iwl_mvm_sta_from_mac80211(sta); 2441 2442 if (!mvmsta->vif || 2443 mvmsta->vif->type != NL80211_IFTYPE_AP) { 2444 rcu_read_unlock(); 2445 return; 2446 } 2447 2448 if (mvmsta->sleeping != sleeping) { 2449 mvmsta->sleeping = sleeping; 2450 __iwl_mvm_mac_sta_notify(mvm->hw, 2451 sleeping ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, 2452 sta); 2453 ieee80211_sta_ps_transition(sta, sleeping); 2454 } 2455 2456 if (sleeping) { 2457 switch (notif->type) { 2458 case IWL_MVM_PM_EVENT_AWAKE: 2459 case IWL_MVM_PM_EVENT_ASLEEP: 2460 break; 2461 case IWL_MVM_PM_EVENT_UAPSD: 2462 ieee80211_sta_uapsd_trigger(sta, IEEE80211_NUM_TIDS); 2463 break; 2464 case IWL_MVM_PM_EVENT_PS_POLL: 2465 ieee80211_sta_pspoll(sta); 2466 break; 2467 default: 2468 break; 2469 } 2470 } 2471 2472 rcu_read_unlock(); 2473 } 2474 2475 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw, 2476 struct ieee80211_vif *vif, 2477 struct ieee80211_sta *sta) 2478 { 2479 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2480 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2481 2482 /* 2483 * This is called before mac80211 does RCU synchronisation, 2484 * so here we already invalidate our internal RCU-protected 2485 * station pointer. The rest of the code will thus no longer 2486 * be able to find the station this way, and we don't rely 2487 * on further RCU synchronisation after the sta_state() 2488 * callback deleted the station. 2489 */ 2490 mutex_lock(&mvm->mutex); 2491 if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id])) 2492 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id], 2493 ERR_PTR(-ENOENT)); 2494 2495 mutex_unlock(&mvm->mutex); 2496 } 2497 2498 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 2499 const u8 *bssid) 2500 { 2501 if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT)) 2502 return; 2503 2504 if (vif->p2p && !iwl_mvm_is_p2p_scm_uapsd_supported(mvm)) { 2505 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 2506 return; 2507 } 2508 2509 if (!vif->p2p && 2510 (iwlwifi_mod_params.uapsd_disable & IWL_DISABLE_UAPSD_BSS)) { 2511 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 2512 return; 2513 } 2514 2515 vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD; 2516 } 2517 2518 static void 2519 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm, 2520 struct ieee80211_vif *vif, u8 *peer_addr, 2521 enum nl80211_tdls_operation action) 2522 { 2523 struct iwl_fw_dbg_trigger_tlv *trig; 2524 struct iwl_fw_dbg_trigger_tdls *tdls_trig; 2525 2526 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS)) 2527 return; 2528 2529 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS); 2530 tdls_trig = (void *)trig->data; 2531 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 2532 ieee80211_vif_to_wdev(vif), trig)) 2533 return; 2534 2535 if (!(tdls_trig->action_bitmap & BIT(action))) 2536 return; 2537 2538 if (tdls_trig->peer_mode && 2539 memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0) 2540 return; 2541 2542 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 2543 "TDLS event occurred, peer %pM, action %d", 2544 peer_addr, action); 2545 } 2546 2547 static void iwl_mvm_purge_deferred_tx_frames(struct iwl_mvm *mvm, 2548 struct iwl_mvm_sta *mvm_sta) 2549 { 2550 struct iwl_mvm_tid_data *tid_data; 2551 struct sk_buff *skb; 2552 int i; 2553 2554 spin_lock_bh(&mvm_sta->lock); 2555 for (i = 0; i <= IWL_MAX_TID_COUNT; i++) { 2556 tid_data = &mvm_sta->tid_data[i]; 2557 2558 while ((skb = __skb_dequeue(&tid_data->deferred_tx_frames))) { 2559 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 2560 2561 /* 2562 * The first deferred frame should've stopped the MAC 2563 * queues, so we should never get a second deferred 2564 * frame for the RA/TID. 2565 */ 2566 iwl_mvm_start_mac_queues(mvm, BIT(info->hw_queue)); 2567 ieee80211_free_txskb(mvm->hw, skb); 2568 } 2569 } 2570 spin_unlock_bh(&mvm_sta->lock); 2571 } 2572 2573 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw, 2574 struct ieee80211_vif *vif, 2575 struct ieee80211_sta *sta, 2576 enum ieee80211_sta_state old_state, 2577 enum ieee80211_sta_state new_state) 2578 { 2579 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2580 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2581 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 2582 int ret; 2583 2584 IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n", 2585 sta->addr, old_state, new_state); 2586 2587 /* this would be a mac80211 bug ... but don't crash */ 2588 if (WARN_ON_ONCE(!mvmvif->phy_ctxt)) 2589 return -EINVAL; 2590 2591 /* 2592 * If we are in a STA removal flow and in DQA mode: 2593 * 2594 * This is after the sync_rcu part, so the queues have already been 2595 * flushed. No more TXs on their way in mac80211's path, and no more in 2596 * the queues. 2597 * Also, we won't be getting any new TX frames for this station. 2598 * What we might have are deferred TX frames that need to be taken care 2599 * of. 2600 * 2601 * Drop any still-queued deferred-frame before removing the STA, and 2602 * make sure the worker is no longer handling frames for this STA. 2603 */ 2604 if (old_state == IEEE80211_STA_NONE && 2605 new_state == IEEE80211_STA_NOTEXIST) { 2606 iwl_mvm_purge_deferred_tx_frames(mvm, mvm_sta); 2607 flush_work(&mvm->add_stream_wk); 2608 2609 /* 2610 * No need to make sure deferred TX indication is off since the 2611 * worker will already remove it if it was on 2612 */ 2613 } 2614 2615 mutex_lock(&mvm->mutex); 2616 /* track whether or not the station is associated */ 2617 mvm_sta->associated = new_state >= IEEE80211_STA_ASSOC; 2618 2619 if (old_state == IEEE80211_STA_NOTEXIST && 2620 new_state == IEEE80211_STA_NONE) { 2621 /* 2622 * Firmware bug - it'll crash if the beacon interval is less 2623 * than 16. We can't avoid connecting at all, so refuse the 2624 * station state change, this will cause mac80211 to abandon 2625 * attempts to connect to this AP, and eventually wpa_s will 2626 * blacklist the AP... 2627 */ 2628 if (vif->type == NL80211_IFTYPE_STATION && 2629 vif->bss_conf.beacon_int < 16) { 2630 IWL_ERR(mvm, 2631 "AP %pM beacon interval is %d, refusing due to firmware bug!\n", 2632 sta->addr, vif->bss_conf.beacon_int); 2633 ret = -EINVAL; 2634 goto out_unlock; 2635 } 2636 2637 if (sta->tdls && 2638 (vif->p2p || 2639 iwl_mvm_tdls_sta_count(mvm, NULL) == 2640 IWL_MVM_TDLS_STA_COUNT || 2641 iwl_mvm_phy_ctx_count(mvm) > 1)) { 2642 IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n"); 2643 ret = -EBUSY; 2644 goto out_unlock; 2645 } 2646 2647 ret = iwl_mvm_add_sta(mvm, vif, sta); 2648 if (sta->tdls && ret == 0) { 2649 iwl_mvm_recalc_tdls_state(mvm, vif, true); 2650 iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr, 2651 NL80211_TDLS_SETUP); 2652 } 2653 } else if (old_state == IEEE80211_STA_NONE && 2654 new_state == IEEE80211_STA_AUTH) { 2655 /* 2656 * EBS may be disabled due to previous failures reported by FW. 2657 * Reset EBS status here assuming environment has been changed. 2658 */ 2659 mvm->last_ebs_successful = true; 2660 iwl_mvm_check_uapsd(mvm, vif, sta->addr); 2661 ret = 0; 2662 } else if (old_state == IEEE80211_STA_AUTH && 2663 new_state == IEEE80211_STA_ASSOC) { 2664 if (vif->type == NL80211_IFTYPE_AP) { 2665 mvmvif->ap_assoc_sta_count++; 2666 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL); 2667 } 2668 2669 iwl_mvm_rs_rate_init(mvm, sta, mvmvif->phy_ctxt->channel->band, 2670 true); 2671 ret = iwl_mvm_update_sta(mvm, vif, sta); 2672 } else if (old_state == IEEE80211_STA_ASSOC && 2673 new_state == IEEE80211_STA_AUTHORIZED) { 2674 2675 /* we don't support TDLS during DCM */ 2676 if (iwl_mvm_phy_ctx_count(mvm) > 1) 2677 iwl_mvm_teardown_tdls_peers(mvm); 2678 2679 if (sta->tdls) 2680 iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr, 2681 NL80211_TDLS_ENABLE_LINK); 2682 2683 /* enable beacon filtering */ 2684 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0)); 2685 ret = 0; 2686 } else if (old_state == IEEE80211_STA_AUTHORIZED && 2687 new_state == IEEE80211_STA_ASSOC) { 2688 /* disable beacon filtering */ 2689 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0)); 2690 ret = 0; 2691 } else if (old_state == IEEE80211_STA_ASSOC && 2692 new_state == IEEE80211_STA_AUTH) { 2693 if (vif->type == NL80211_IFTYPE_AP) { 2694 mvmvif->ap_assoc_sta_count--; 2695 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL); 2696 } 2697 ret = 0; 2698 } else if (old_state == IEEE80211_STA_AUTH && 2699 new_state == IEEE80211_STA_NONE) { 2700 ret = 0; 2701 } else if (old_state == IEEE80211_STA_NONE && 2702 new_state == IEEE80211_STA_NOTEXIST) { 2703 ret = iwl_mvm_rm_sta(mvm, vif, sta); 2704 if (sta->tdls) { 2705 iwl_mvm_recalc_tdls_state(mvm, vif, false); 2706 iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr, 2707 NL80211_TDLS_DISABLE_LINK); 2708 } 2709 } else { 2710 ret = -EIO; 2711 } 2712 out_unlock: 2713 mutex_unlock(&mvm->mutex); 2714 2715 if (sta->tdls && ret == 0) { 2716 if (old_state == IEEE80211_STA_NOTEXIST && 2717 new_state == IEEE80211_STA_NONE) 2718 ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID); 2719 else if (old_state == IEEE80211_STA_NONE && 2720 new_state == IEEE80211_STA_NOTEXIST) 2721 ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID); 2722 } 2723 2724 return ret; 2725 } 2726 2727 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value) 2728 { 2729 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2730 2731 mvm->rts_threshold = value; 2732 2733 return 0; 2734 } 2735 2736 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw, 2737 struct ieee80211_vif *vif, 2738 struct ieee80211_sta *sta, u32 changed) 2739 { 2740 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2741 2742 if (vif->type == NL80211_IFTYPE_STATION && 2743 changed & IEEE80211_RC_NSS_CHANGED) 2744 iwl_mvm_sf_update(mvm, vif, false); 2745 } 2746 2747 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw, 2748 struct ieee80211_vif *vif, u16 ac, 2749 const struct ieee80211_tx_queue_params *params) 2750 { 2751 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2752 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 2753 2754 mvmvif->queue_params[ac] = *params; 2755 2756 /* 2757 * No need to update right away, we'll get BSS_CHANGED_QOS 2758 * The exception is P2P_DEVICE interface which needs immediate update. 2759 */ 2760 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) { 2761 int ret; 2762 2763 mutex_lock(&mvm->mutex); 2764 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL); 2765 mutex_unlock(&mvm->mutex); 2766 return ret; 2767 } 2768 return 0; 2769 } 2770 2771 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw, 2772 struct ieee80211_vif *vif) 2773 { 2774 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2775 u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS; 2776 u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS; 2777 2778 if (WARN_ON_ONCE(vif->bss_conf.assoc)) 2779 return; 2780 2781 /* 2782 * iwl_mvm_protect_session() reads directly from the device 2783 * (the system time), so make sure it is available. 2784 */ 2785 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX)) 2786 return; 2787 2788 mutex_lock(&mvm->mutex); 2789 /* Try really hard to protect the session and hear a beacon */ 2790 iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false); 2791 mutex_unlock(&mvm->mutex); 2792 2793 iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX); 2794 } 2795 2796 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw, 2797 struct ieee80211_vif *vif, 2798 struct cfg80211_sched_scan_request *req, 2799 struct ieee80211_scan_ies *ies) 2800 { 2801 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2802 2803 int ret; 2804 2805 mutex_lock(&mvm->mutex); 2806 2807 if (!vif->bss_conf.idle) { 2808 ret = -EBUSY; 2809 goto out; 2810 } 2811 2812 ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED); 2813 2814 out: 2815 mutex_unlock(&mvm->mutex); 2816 return ret; 2817 } 2818 2819 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw, 2820 struct ieee80211_vif *vif) 2821 { 2822 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2823 int ret; 2824 2825 mutex_lock(&mvm->mutex); 2826 2827 /* Due to a race condition, it's possible that mac80211 asks 2828 * us to stop a sched_scan when it's already stopped. This 2829 * can happen, for instance, if we stopped the scan ourselves, 2830 * called ieee80211_sched_scan_stopped() and the userspace called 2831 * stop sched scan scan before ieee80211_sched_scan_stopped_work() 2832 * could run. To handle this, simply return if the scan is 2833 * not running. 2834 */ 2835 if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) { 2836 mutex_unlock(&mvm->mutex); 2837 return 0; 2838 } 2839 2840 ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false); 2841 mutex_unlock(&mvm->mutex); 2842 iwl_mvm_wait_for_async_handlers(mvm); 2843 2844 return ret; 2845 } 2846 2847 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw, 2848 enum set_key_cmd cmd, 2849 struct ieee80211_vif *vif, 2850 struct ieee80211_sta *sta, 2851 struct ieee80211_key_conf *key) 2852 { 2853 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 2854 struct iwl_mvm_sta *mvmsta; 2855 struct iwl_mvm_key_pn *ptk_pn; 2856 int keyidx = key->keyidx; 2857 int ret; 2858 u8 key_offset; 2859 2860 if (iwlwifi_mod_params.swcrypto) { 2861 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n"); 2862 return -EOPNOTSUPP; 2863 } 2864 2865 switch (key->cipher) { 2866 case WLAN_CIPHER_SUITE_TKIP: 2867 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 2868 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE; 2869 break; 2870 case WLAN_CIPHER_SUITE_CCMP: 2871 case WLAN_CIPHER_SUITE_GCMP: 2872 case WLAN_CIPHER_SUITE_GCMP_256: 2873 if (!iwl_mvm_has_new_tx_api(mvm)) 2874 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE; 2875 break; 2876 case WLAN_CIPHER_SUITE_AES_CMAC: 2877 case WLAN_CIPHER_SUITE_BIP_GMAC_128: 2878 case WLAN_CIPHER_SUITE_BIP_GMAC_256: 2879 WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE)); 2880 break; 2881 case WLAN_CIPHER_SUITE_WEP40: 2882 case WLAN_CIPHER_SUITE_WEP104: 2883 /* For non-client mode, only use WEP keys for TX as we probably 2884 * don't have a station yet anyway and would then have to keep 2885 * track of the keys, linking them to each of the clients/peers 2886 * as they appear. For now, don't do that, for performance WEP 2887 * offload doesn't really matter much, but we need it for some 2888 * other offload features in client mode. 2889 */ 2890 if (vif->type != NL80211_IFTYPE_STATION) 2891 return 0; 2892 break; 2893 default: 2894 /* currently FW supports only one optional cipher scheme */ 2895 if (hw->n_cipher_schemes && 2896 hw->cipher_schemes->cipher == key->cipher) 2897 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE; 2898 else 2899 return -EOPNOTSUPP; 2900 } 2901 2902 mutex_lock(&mvm->mutex); 2903 2904 switch (cmd) { 2905 case SET_KEY: 2906 if ((vif->type == NL80211_IFTYPE_ADHOC || 2907 vif->type == NL80211_IFTYPE_AP) && !sta) { 2908 /* 2909 * GTK on AP interface is a TX-only key, return 0; 2910 * on IBSS they're per-station and because we're lazy 2911 * we don't support them for RX, so do the same. 2912 * CMAC/GMAC in AP/IBSS modes must be done in software. 2913 */ 2914 if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC || 2915 key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 || 2916 key->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256) 2917 ret = -EOPNOTSUPP; 2918 else 2919 ret = 0; 2920 2921 if (key->cipher != WLAN_CIPHER_SUITE_GCMP && 2922 key->cipher != WLAN_CIPHER_SUITE_GCMP_256 && 2923 !iwl_mvm_has_new_tx_api(mvm)) { 2924 key->hw_key_idx = STA_KEY_IDX_INVALID; 2925 break; 2926 } 2927 } 2928 2929 /* During FW restart, in order to restore the state as it was, 2930 * don't try to reprogram keys we previously failed for. 2931 */ 2932 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 2933 key->hw_key_idx == STA_KEY_IDX_INVALID) { 2934 IWL_DEBUG_MAC80211(mvm, 2935 "skip invalid idx key programming during restart\n"); 2936 ret = 0; 2937 break; 2938 } 2939 2940 if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 2941 sta && iwl_mvm_has_new_rx_api(mvm) && 2942 key->flags & IEEE80211_KEY_FLAG_PAIRWISE && 2943 (key->cipher == WLAN_CIPHER_SUITE_CCMP || 2944 key->cipher == WLAN_CIPHER_SUITE_GCMP || 2945 key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) { 2946 struct ieee80211_key_seq seq; 2947 int tid, q; 2948 2949 mvmsta = iwl_mvm_sta_from_mac80211(sta); 2950 WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx])); 2951 ptk_pn = kzalloc(sizeof(*ptk_pn) + 2952 mvm->trans->num_rx_queues * 2953 sizeof(ptk_pn->q[0]), 2954 GFP_KERNEL); 2955 if (!ptk_pn) { 2956 ret = -ENOMEM; 2957 break; 2958 } 2959 2960 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) { 2961 ieee80211_get_key_rx_seq(key, tid, &seq); 2962 for (q = 0; q < mvm->trans->num_rx_queues; q++) 2963 memcpy(ptk_pn->q[q].pn[tid], 2964 seq.ccmp.pn, 2965 IEEE80211_CCMP_PN_LEN); 2966 } 2967 2968 rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn); 2969 } 2970 2971 /* in HW restart reuse the index, otherwise request a new one */ 2972 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) 2973 key_offset = key->hw_key_idx; 2974 else 2975 key_offset = STA_KEY_IDX_INVALID; 2976 2977 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n"); 2978 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset); 2979 if (ret) { 2980 IWL_WARN(mvm, "set key failed\n"); 2981 /* 2982 * can't add key for RX, but we don't need it 2983 * in the device for TX so still return 0 2984 */ 2985 key->hw_key_idx = STA_KEY_IDX_INVALID; 2986 ret = 0; 2987 } 2988 2989 break; 2990 case DISABLE_KEY: 2991 if (key->hw_key_idx == STA_KEY_IDX_INVALID) { 2992 ret = 0; 2993 break; 2994 } 2995 2996 if (sta && iwl_mvm_has_new_rx_api(mvm) && 2997 key->flags & IEEE80211_KEY_FLAG_PAIRWISE && 2998 (key->cipher == WLAN_CIPHER_SUITE_CCMP || 2999 key->cipher == WLAN_CIPHER_SUITE_GCMP || 3000 key->cipher == WLAN_CIPHER_SUITE_GCMP_256)) { 3001 mvmsta = iwl_mvm_sta_from_mac80211(sta); 3002 ptk_pn = rcu_dereference_protected( 3003 mvmsta->ptk_pn[keyidx], 3004 lockdep_is_held(&mvm->mutex)); 3005 RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL); 3006 if (ptk_pn) 3007 kfree_rcu(ptk_pn, rcu_head); 3008 } 3009 3010 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n"); 3011 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key); 3012 break; 3013 default: 3014 ret = -EINVAL; 3015 } 3016 3017 mutex_unlock(&mvm->mutex); 3018 return ret; 3019 } 3020 3021 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw, 3022 struct ieee80211_vif *vif, 3023 struct ieee80211_key_conf *keyconf, 3024 struct ieee80211_sta *sta, 3025 u32 iv32, u16 *phase1key) 3026 { 3027 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3028 3029 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID) 3030 return; 3031 3032 iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key); 3033 } 3034 3035 3036 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait, 3037 struct iwl_rx_packet *pkt, void *data) 3038 { 3039 struct iwl_mvm *mvm = 3040 container_of(notif_wait, struct iwl_mvm, notif_wait); 3041 struct iwl_hs20_roc_res *resp; 3042 int resp_len = iwl_rx_packet_payload_len(pkt); 3043 struct iwl_mvm_time_event_data *te_data = data; 3044 3045 if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD)) 3046 return true; 3047 3048 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) { 3049 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n"); 3050 return true; 3051 } 3052 3053 resp = (void *)pkt->data; 3054 3055 IWL_DEBUG_TE(mvm, 3056 "Aux ROC: Recieved response from ucode: status=%d uid=%d\n", 3057 resp->status, resp->event_unique_id); 3058 3059 te_data->uid = le32_to_cpu(resp->event_unique_id); 3060 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n", 3061 te_data->uid); 3062 3063 spin_lock_bh(&mvm->time_event_lock); 3064 list_add_tail(&te_data->list, &mvm->aux_roc_te_list); 3065 spin_unlock_bh(&mvm->time_event_lock); 3066 3067 return true; 3068 } 3069 3070 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100) 3071 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200) 3072 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600) 3073 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20) 3074 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10) 3075 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm, 3076 struct ieee80211_channel *channel, 3077 struct ieee80211_vif *vif, 3078 int duration) 3079 { 3080 int res, time_reg = DEVICE_SYSTEM_TIME_REG; 3081 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3082 struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data; 3083 static const u16 time_event_response[] = { HOT_SPOT_CMD }; 3084 struct iwl_notification_wait wait_time_event; 3085 u32 dtim_interval = vif->bss_conf.dtim_period * 3086 vif->bss_conf.beacon_int; 3087 u32 req_dur, delay; 3088 struct iwl_hs20_roc_req aux_roc_req = { 3089 .action = cpu_to_le32(FW_CTXT_ACTION_ADD), 3090 .id_and_color = 3091 cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)), 3092 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id), 3093 /* Set the channel info data */ 3094 .channel_info.band = (channel->band == NL80211_BAND_2GHZ) ? 3095 PHY_BAND_24 : PHY_BAND_5, 3096 .channel_info.channel = channel->hw_value, 3097 .channel_info.width = PHY_VHT_CHANNEL_MODE20, 3098 /* Set the time and duration */ 3099 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)), 3100 }; 3101 3102 delay = AUX_ROC_MIN_DELAY; 3103 req_dur = MSEC_TO_TU(duration); 3104 3105 /* 3106 * If we are associated we want the delay time to be at least one 3107 * dtim interval so that the FW can wait until after the DTIM and 3108 * then start the time event, this will potentially allow us to 3109 * remain off-channel for the max duration. 3110 * Since we want to use almost a whole dtim interval we would also 3111 * like the delay to be for 2-3 dtim intervals, in case there are 3112 * other time events with higher priority. 3113 */ 3114 if (vif->bss_conf.assoc) { 3115 delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY); 3116 /* We cannot remain off-channel longer than the DTIM interval */ 3117 if (dtim_interval <= req_dur) { 3118 req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER; 3119 if (req_dur <= AUX_ROC_MIN_DURATION) 3120 req_dur = dtim_interval - 3121 AUX_ROC_MIN_SAFETY_BUFFER; 3122 } 3123 } 3124 3125 aux_roc_req.duration = cpu_to_le32(req_dur); 3126 aux_roc_req.apply_time_max_delay = cpu_to_le32(delay); 3127 3128 IWL_DEBUG_TE(mvm, 3129 "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n", 3130 channel->hw_value, req_dur, duration, delay, 3131 dtim_interval); 3132 /* Set the node address */ 3133 memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN); 3134 3135 lockdep_assert_held(&mvm->mutex); 3136 3137 spin_lock_bh(&mvm->time_event_lock); 3138 3139 if (WARN_ON(te_data->id == HOT_SPOT_CMD)) { 3140 spin_unlock_bh(&mvm->time_event_lock); 3141 return -EIO; 3142 } 3143 3144 te_data->vif = vif; 3145 te_data->duration = duration; 3146 te_data->id = HOT_SPOT_CMD; 3147 3148 spin_unlock_bh(&mvm->time_event_lock); 3149 3150 /* 3151 * Use a notification wait, which really just processes the 3152 * command response and doesn't wait for anything, in order 3153 * to be able to process the response and get the UID inside 3154 * the RX path. Using CMD_WANT_SKB doesn't work because it 3155 * stores the buffer and then wakes up this thread, by which 3156 * time another notification (that the time event started) 3157 * might already be processed unsuccessfully. 3158 */ 3159 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event, 3160 time_event_response, 3161 ARRAY_SIZE(time_event_response), 3162 iwl_mvm_rx_aux_roc, te_data); 3163 3164 res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req), 3165 &aux_roc_req); 3166 3167 if (res) { 3168 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res); 3169 iwl_remove_notification(&mvm->notif_wait, &wait_time_event); 3170 goto out_clear_te; 3171 } 3172 3173 /* No need to wait for anything, so just pass 1 (0 isn't valid) */ 3174 res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1); 3175 /* should never fail */ 3176 WARN_ON_ONCE(res); 3177 3178 if (res) { 3179 out_clear_te: 3180 spin_lock_bh(&mvm->time_event_lock); 3181 iwl_mvm_te_clear_data(mvm, te_data); 3182 spin_unlock_bh(&mvm->time_event_lock); 3183 } 3184 3185 return res; 3186 } 3187 3188 static int iwl_mvm_roc(struct ieee80211_hw *hw, 3189 struct ieee80211_vif *vif, 3190 struct ieee80211_channel *channel, 3191 int duration, 3192 enum ieee80211_roc_type type) 3193 { 3194 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3195 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3196 struct cfg80211_chan_def chandef; 3197 struct iwl_mvm_phy_ctxt *phy_ctxt; 3198 int ret, i; 3199 3200 IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value, 3201 duration, type); 3202 3203 /* 3204 * Flush the done work, just in case it's still pending, so that 3205 * the work it does can complete and we can accept new frames. 3206 */ 3207 flush_work(&mvm->roc_done_wk); 3208 3209 mutex_lock(&mvm->mutex); 3210 3211 switch (vif->type) { 3212 case NL80211_IFTYPE_STATION: 3213 if (fw_has_capa(&mvm->fw->ucode_capa, 3214 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) { 3215 /* Use aux roc framework (HS20) */ 3216 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel, 3217 vif, duration); 3218 goto out_unlock; 3219 } 3220 IWL_ERR(mvm, "hotspot not supported\n"); 3221 ret = -EINVAL; 3222 goto out_unlock; 3223 case NL80211_IFTYPE_P2P_DEVICE: 3224 /* handle below */ 3225 break; 3226 default: 3227 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type); 3228 ret = -EINVAL; 3229 goto out_unlock; 3230 } 3231 3232 for (i = 0; i < NUM_PHY_CTX; i++) { 3233 phy_ctxt = &mvm->phy_ctxts[i]; 3234 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt) 3235 continue; 3236 3237 if (phy_ctxt->ref && channel == phy_ctxt->channel) { 3238 /* 3239 * Unbind the P2P_DEVICE from the current PHY context, 3240 * and if the PHY context is not used remove it. 3241 */ 3242 ret = iwl_mvm_binding_remove_vif(mvm, vif); 3243 if (WARN(ret, "Failed unbinding P2P_DEVICE\n")) 3244 goto out_unlock; 3245 3246 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt); 3247 3248 /* Bind the P2P_DEVICE to the current PHY Context */ 3249 mvmvif->phy_ctxt = phy_ctxt; 3250 3251 ret = iwl_mvm_binding_add_vif(mvm, vif); 3252 if (WARN(ret, "Failed binding P2P_DEVICE\n")) 3253 goto out_unlock; 3254 3255 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt); 3256 goto schedule_time_event; 3257 } 3258 } 3259 3260 /* Need to update the PHY context only if the ROC channel changed */ 3261 if (channel == mvmvif->phy_ctxt->channel) 3262 goto schedule_time_event; 3263 3264 cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT); 3265 3266 /* 3267 * Change the PHY context configuration as it is currently referenced 3268 * only by the P2P Device MAC 3269 */ 3270 if (mvmvif->phy_ctxt->ref == 1) { 3271 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt, 3272 &chandef, 1, 1); 3273 if (ret) 3274 goto out_unlock; 3275 } else { 3276 /* 3277 * The PHY context is shared with other MACs. Need to remove the 3278 * P2P Device from the binding, allocate an new PHY context and 3279 * create a new binding 3280 */ 3281 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm); 3282 if (!phy_ctxt) { 3283 ret = -ENOSPC; 3284 goto out_unlock; 3285 } 3286 3287 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef, 3288 1, 1); 3289 if (ret) { 3290 IWL_ERR(mvm, "Failed to change PHY context\n"); 3291 goto out_unlock; 3292 } 3293 3294 /* Unbind the P2P_DEVICE from the current PHY context */ 3295 ret = iwl_mvm_binding_remove_vif(mvm, vif); 3296 if (WARN(ret, "Failed unbinding P2P_DEVICE\n")) 3297 goto out_unlock; 3298 3299 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt); 3300 3301 /* Bind the P2P_DEVICE to the new allocated PHY context */ 3302 mvmvif->phy_ctxt = phy_ctxt; 3303 3304 ret = iwl_mvm_binding_add_vif(mvm, vif); 3305 if (WARN(ret, "Failed binding P2P_DEVICE\n")) 3306 goto out_unlock; 3307 3308 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt); 3309 } 3310 3311 schedule_time_event: 3312 /* Schedule the time events */ 3313 ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type); 3314 3315 out_unlock: 3316 mutex_unlock(&mvm->mutex); 3317 IWL_DEBUG_MAC80211(mvm, "leave\n"); 3318 return ret; 3319 } 3320 3321 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw) 3322 { 3323 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3324 3325 IWL_DEBUG_MAC80211(mvm, "enter\n"); 3326 3327 mutex_lock(&mvm->mutex); 3328 iwl_mvm_stop_roc(mvm); 3329 mutex_unlock(&mvm->mutex); 3330 3331 IWL_DEBUG_MAC80211(mvm, "leave\n"); 3332 return 0; 3333 } 3334 3335 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm, 3336 struct ieee80211_chanctx_conf *ctx) 3337 { 3338 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv; 3339 struct iwl_mvm_phy_ctxt *phy_ctxt; 3340 int ret; 3341 3342 lockdep_assert_held(&mvm->mutex); 3343 3344 IWL_DEBUG_MAC80211(mvm, "Add channel context\n"); 3345 3346 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm); 3347 if (!phy_ctxt) { 3348 ret = -ENOSPC; 3349 goto out; 3350 } 3351 3352 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def, 3353 ctx->rx_chains_static, 3354 ctx->rx_chains_dynamic); 3355 if (ret) { 3356 IWL_ERR(mvm, "Failed to add PHY context\n"); 3357 goto out; 3358 } 3359 3360 iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt); 3361 *phy_ctxt_id = phy_ctxt->id; 3362 out: 3363 return ret; 3364 } 3365 3366 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw, 3367 struct ieee80211_chanctx_conf *ctx) 3368 { 3369 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3370 int ret; 3371 3372 mutex_lock(&mvm->mutex); 3373 ret = __iwl_mvm_add_chanctx(mvm, ctx); 3374 mutex_unlock(&mvm->mutex); 3375 3376 return ret; 3377 } 3378 3379 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm, 3380 struct ieee80211_chanctx_conf *ctx) 3381 { 3382 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv; 3383 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id]; 3384 3385 lockdep_assert_held(&mvm->mutex); 3386 3387 iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt); 3388 } 3389 3390 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw, 3391 struct ieee80211_chanctx_conf *ctx) 3392 { 3393 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3394 3395 mutex_lock(&mvm->mutex); 3396 __iwl_mvm_remove_chanctx(mvm, ctx); 3397 mutex_unlock(&mvm->mutex); 3398 } 3399 3400 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw, 3401 struct ieee80211_chanctx_conf *ctx, 3402 u32 changed) 3403 { 3404 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3405 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv; 3406 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id]; 3407 3408 if (WARN_ONCE((phy_ctxt->ref > 1) && 3409 (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH | 3410 IEEE80211_CHANCTX_CHANGE_RX_CHAINS | 3411 IEEE80211_CHANCTX_CHANGE_RADAR | 3412 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)), 3413 "Cannot change PHY. Ref=%d, changed=0x%X\n", 3414 phy_ctxt->ref, changed)) 3415 return; 3416 3417 mutex_lock(&mvm->mutex); 3418 3419 /* we are only changing the min_width, may be a noop */ 3420 if (changed == IEEE80211_CHANCTX_CHANGE_MIN_WIDTH) { 3421 if (phy_ctxt->width == ctx->min_def.width) 3422 goto out_unlock; 3423 3424 /* we are just toggling between 20_NOHT and 20 */ 3425 if (phy_ctxt->width <= NL80211_CHAN_WIDTH_20 && 3426 ctx->min_def.width <= NL80211_CHAN_WIDTH_20) 3427 goto out_unlock; 3428 } 3429 3430 iwl_mvm_bt_coex_vif_change(mvm); 3431 iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def, 3432 ctx->rx_chains_static, 3433 ctx->rx_chains_dynamic); 3434 3435 out_unlock: 3436 mutex_unlock(&mvm->mutex); 3437 } 3438 3439 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm, 3440 struct ieee80211_vif *vif, 3441 struct ieee80211_chanctx_conf *ctx, 3442 bool switching_chanctx) 3443 { 3444 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv; 3445 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id]; 3446 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3447 int ret; 3448 3449 lockdep_assert_held(&mvm->mutex); 3450 3451 mvmvif->phy_ctxt = phy_ctxt; 3452 3453 switch (vif->type) { 3454 case NL80211_IFTYPE_AP: 3455 /* only needed if we're switching chanctx (i.e. during CSA) */ 3456 if (switching_chanctx) { 3457 mvmvif->ap_ibss_active = true; 3458 break; 3459 } 3460 case NL80211_IFTYPE_ADHOC: 3461 /* 3462 * The AP binding flow is handled as part of the start_ap flow 3463 * (in bss_info_changed), similarly for IBSS. 3464 */ 3465 ret = 0; 3466 goto out; 3467 case NL80211_IFTYPE_STATION: 3468 break; 3469 case NL80211_IFTYPE_MONITOR: 3470 /* always disable PS when a monitor interface is active */ 3471 mvmvif->ps_disabled = true; 3472 break; 3473 default: 3474 ret = -EINVAL; 3475 goto out; 3476 } 3477 3478 ret = iwl_mvm_binding_add_vif(mvm, vif); 3479 if (ret) 3480 goto out; 3481 3482 /* 3483 * Power state must be updated before quotas, 3484 * otherwise fw will complain. 3485 */ 3486 iwl_mvm_power_update_mac(mvm); 3487 3488 /* Setting the quota at this stage is only required for monitor 3489 * interfaces. For the other types, the bss_info changed flow 3490 * will handle quota settings. 3491 */ 3492 if (vif->type == NL80211_IFTYPE_MONITOR) { 3493 mvmvif->monitor_active = true; 3494 ret = iwl_mvm_update_quotas(mvm, false, NULL); 3495 if (ret) 3496 goto out_remove_binding; 3497 3498 ret = iwl_mvm_add_snif_sta(mvm, vif); 3499 if (ret) 3500 goto out_remove_binding; 3501 3502 } 3503 3504 /* Handle binding during CSA */ 3505 if (vif->type == NL80211_IFTYPE_AP) { 3506 iwl_mvm_update_quotas(mvm, false, NULL); 3507 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL); 3508 } 3509 3510 if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) { 3511 u32 duration = 2 * vif->bss_conf.beacon_int; 3512 3513 /* iwl_mvm_protect_session() reads directly from the 3514 * device (the system time), so make sure it is 3515 * available. 3516 */ 3517 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA); 3518 if (ret) 3519 goto out_remove_binding; 3520 3521 /* Protect the session to make sure we hear the first 3522 * beacon on the new channel. 3523 */ 3524 iwl_mvm_protect_session(mvm, vif, duration, duration, 3525 vif->bss_conf.beacon_int / 2, 3526 true); 3527 3528 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA); 3529 3530 iwl_mvm_update_quotas(mvm, false, NULL); 3531 } 3532 3533 goto out; 3534 3535 out_remove_binding: 3536 iwl_mvm_binding_remove_vif(mvm, vif); 3537 iwl_mvm_power_update_mac(mvm); 3538 out: 3539 if (ret) 3540 mvmvif->phy_ctxt = NULL; 3541 return ret; 3542 } 3543 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw, 3544 struct ieee80211_vif *vif, 3545 struct ieee80211_chanctx_conf *ctx) 3546 { 3547 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3548 int ret; 3549 3550 mutex_lock(&mvm->mutex); 3551 ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false); 3552 mutex_unlock(&mvm->mutex); 3553 3554 return ret; 3555 } 3556 3557 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm, 3558 struct ieee80211_vif *vif, 3559 struct ieee80211_chanctx_conf *ctx, 3560 bool switching_chanctx) 3561 { 3562 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3563 struct ieee80211_vif *disabled_vif = NULL; 3564 3565 lockdep_assert_held(&mvm->mutex); 3566 3567 iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data); 3568 3569 switch (vif->type) { 3570 case NL80211_IFTYPE_ADHOC: 3571 goto out; 3572 case NL80211_IFTYPE_MONITOR: 3573 mvmvif->monitor_active = false; 3574 mvmvif->ps_disabled = false; 3575 iwl_mvm_rm_snif_sta(mvm, vif); 3576 break; 3577 case NL80211_IFTYPE_AP: 3578 /* This part is triggered only during CSA */ 3579 if (!switching_chanctx || !mvmvif->ap_ibss_active) 3580 goto out; 3581 3582 mvmvif->csa_countdown = false; 3583 3584 /* Set CS bit on all the stations */ 3585 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true); 3586 3587 /* Save blocked iface, the timeout is set on the next beacon */ 3588 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif); 3589 3590 mvmvif->ap_ibss_active = false; 3591 break; 3592 case NL80211_IFTYPE_STATION: 3593 if (!switching_chanctx) 3594 break; 3595 3596 disabled_vif = vif; 3597 3598 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL); 3599 break; 3600 default: 3601 break; 3602 } 3603 3604 iwl_mvm_update_quotas(mvm, false, disabled_vif); 3605 iwl_mvm_binding_remove_vif(mvm, vif); 3606 3607 out: 3608 mvmvif->phy_ctxt = NULL; 3609 iwl_mvm_power_update_mac(mvm); 3610 } 3611 3612 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw, 3613 struct ieee80211_vif *vif, 3614 struct ieee80211_chanctx_conf *ctx) 3615 { 3616 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3617 3618 mutex_lock(&mvm->mutex); 3619 __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false); 3620 mutex_unlock(&mvm->mutex); 3621 } 3622 3623 static int 3624 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm, 3625 struct ieee80211_vif_chanctx_switch *vifs) 3626 { 3627 int ret; 3628 3629 mutex_lock(&mvm->mutex); 3630 __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true); 3631 __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx); 3632 3633 ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx); 3634 if (ret) { 3635 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n"); 3636 goto out_reassign; 3637 } 3638 3639 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx, 3640 true); 3641 if (ret) { 3642 IWL_ERR(mvm, 3643 "failed to assign new_ctx during channel switch\n"); 3644 goto out_remove; 3645 } 3646 3647 /* we don't support TDLS during DCM - can be caused by channel switch */ 3648 if (iwl_mvm_phy_ctx_count(mvm) > 1) 3649 iwl_mvm_teardown_tdls_peers(mvm); 3650 3651 goto out; 3652 3653 out_remove: 3654 __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx); 3655 3656 out_reassign: 3657 if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) { 3658 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n"); 3659 goto out_restart; 3660 } 3661 3662 if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, 3663 true)) { 3664 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n"); 3665 goto out_restart; 3666 } 3667 3668 goto out; 3669 3670 out_restart: 3671 /* things keep failing, better restart the hw */ 3672 iwl_mvm_nic_restart(mvm, false); 3673 3674 out: 3675 mutex_unlock(&mvm->mutex); 3676 3677 return ret; 3678 } 3679 3680 static int 3681 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm, 3682 struct ieee80211_vif_chanctx_switch *vifs) 3683 { 3684 int ret; 3685 3686 mutex_lock(&mvm->mutex); 3687 __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true); 3688 3689 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx, 3690 true); 3691 if (ret) { 3692 IWL_ERR(mvm, 3693 "failed to assign new_ctx during channel switch\n"); 3694 goto out_reassign; 3695 } 3696 3697 goto out; 3698 3699 out_reassign: 3700 if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, 3701 true)) { 3702 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n"); 3703 goto out_restart; 3704 } 3705 3706 goto out; 3707 3708 out_restart: 3709 /* things keep failing, better restart the hw */ 3710 iwl_mvm_nic_restart(mvm, false); 3711 3712 out: 3713 mutex_unlock(&mvm->mutex); 3714 3715 return ret; 3716 } 3717 3718 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw, 3719 struct ieee80211_vif_chanctx_switch *vifs, 3720 int n_vifs, 3721 enum ieee80211_chanctx_switch_mode mode) 3722 { 3723 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3724 int ret; 3725 3726 /* we only support a single-vif right now */ 3727 if (n_vifs > 1) 3728 return -EOPNOTSUPP; 3729 3730 switch (mode) { 3731 case CHANCTX_SWMODE_SWAP_CONTEXTS: 3732 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs); 3733 break; 3734 case CHANCTX_SWMODE_REASSIGN_VIF: 3735 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs); 3736 break; 3737 default: 3738 ret = -EOPNOTSUPP; 3739 break; 3740 } 3741 3742 return ret; 3743 } 3744 3745 static int iwl_mvm_tx_last_beacon(struct ieee80211_hw *hw) 3746 { 3747 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3748 3749 return mvm->ibss_manager; 3750 } 3751 3752 static int iwl_mvm_set_tim(struct ieee80211_hw *hw, 3753 struct ieee80211_sta *sta, 3754 bool set) 3755 { 3756 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3757 struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta); 3758 3759 if (!mvm_sta || !mvm_sta->vif) { 3760 IWL_ERR(mvm, "Station is not associated to a vif\n"); 3761 return -EINVAL; 3762 } 3763 3764 return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif); 3765 } 3766 3767 #ifdef CONFIG_NL80211_TESTMODE 3768 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = { 3769 [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 }, 3770 [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 }, 3771 [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 }, 3772 }; 3773 3774 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm, 3775 struct ieee80211_vif *vif, 3776 void *data, int len) 3777 { 3778 struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1]; 3779 int err; 3780 u32 noa_duration; 3781 3782 err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy, 3783 NULL); 3784 if (err) 3785 return err; 3786 3787 if (!tb[IWL_MVM_TM_ATTR_CMD]) 3788 return -EINVAL; 3789 3790 switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) { 3791 case IWL_MVM_TM_CMD_SET_NOA: 3792 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p || 3793 !vif->bss_conf.enable_beacon || 3794 !tb[IWL_MVM_TM_ATTR_NOA_DURATION]) 3795 return -EINVAL; 3796 3797 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]); 3798 if (noa_duration >= vif->bss_conf.beacon_int) 3799 return -EINVAL; 3800 3801 mvm->noa_duration = noa_duration; 3802 mvm->noa_vif = vif; 3803 3804 return iwl_mvm_update_quotas(mvm, true, NULL); 3805 case IWL_MVM_TM_CMD_SET_BEACON_FILTER: 3806 /* must be associated client vif - ignore authorized */ 3807 if (!vif || vif->type != NL80211_IFTYPE_STATION || 3808 !vif->bss_conf.assoc || !vif->bss_conf.dtim_period || 3809 !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]) 3810 return -EINVAL; 3811 3812 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])) 3813 return iwl_mvm_enable_beacon_filter(mvm, vif, 0); 3814 return iwl_mvm_disable_beacon_filter(mvm, vif, 0); 3815 } 3816 3817 return -EOPNOTSUPP; 3818 } 3819 3820 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw, 3821 struct ieee80211_vif *vif, 3822 void *data, int len) 3823 { 3824 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3825 int err; 3826 3827 mutex_lock(&mvm->mutex); 3828 err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len); 3829 mutex_unlock(&mvm->mutex); 3830 3831 return err; 3832 } 3833 #endif 3834 3835 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw, 3836 struct ieee80211_vif *vif, 3837 struct ieee80211_channel_switch *chsw) 3838 { 3839 /* By implementing this operation, we prevent mac80211 from 3840 * starting its own channel switch timer, so that we can call 3841 * ieee80211_chswitch_done() ourselves at the right time 3842 * (which is when the absence time event starts). 3843 */ 3844 3845 IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw), 3846 "dummy channel switch op\n"); 3847 } 3848 3849 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw, 3850 struct ieee80211_vif *vif, 3851 struct ieee80211_channel_switch *chsw) 3852 { 3853 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3854 struct ieee80211_vif *csa_vif; 3855 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3856 u32 apply_time; 3857 int ret; 3858 3859 mutex_lock(&mvm->mutex); 3860 3861 mvmvif->csa_failed = false; 3862 3863 IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n", 3864 chsw->chandef.center_freq1); 3865 3866 iwl_fw_dbg_trigger_simple_stop(&mvm->fwrt, 3867 ieee80211_vif_to_wdev(vif), 3868 FW_DBG_TRIGGER_CHANNEL_SWITCH); 3869 3870 switch (vif->type) { 3871 case NL80211_IFTYPE_AP: 3872 csa_vif = 3873 rcu_dereference_protected(mvm->csa_vif, 3874 lockdep_is_held(&mvm->mutex)); 3875 if (WARN_ONCE(csa_vif && csa_vif->csa_active, 3876 "Another CSA is already in progress")) { 3877 ret = -EBUSY; 3878 goto out_unlock; 3879 } 3880 3881 /* we still didn't unblock tx. prevent new CS meanwhile */ 3882 if (rcu_dereference_protected(mvm->csa_tx_blocked_vif, 3883 lockdep_is_held(&mvm->mutex))) { 3884 ret = -EBUSY; 3885 goto out_unlock; 3886 } 3887 3888 rcu_assign_pointer(mvm->csa_vif, vif); 3889 3890 if (WARN_ONCE(mvmvif->csa_countdown, 3891 "Previous CSA countdown didn't complete")) { 3892 ret = -EBUSY; 3893 goto out_unlock; 3894 } 3895 3896 mvmvif->csa_target_freq = chsw->chandef.chan->center_freq; 3897 3898 break; 3899 case NL80211_IFTYPE_STATION: 3900 /* Schedule the time event to a bit before beacon 1, 3901 * to make sure we're in the new channel when the 3902 * GO/AP arrives. In case count <= 1 immediately schedule the 3903 * TE (this might result with some packet loss or connection 3904 * loss). 3905 */ 3906 if (chsw->count <= 1) 3907 apply_time = 0; 3908 else 3909 apply_time = chsw->device_timestamp + 3910 ((vif->bss_conf.beacon_int * (chsw->count - 1) - 3911 IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024); 3912 3913 if (chsw->block_tx) 3914 iwl_mvm_csa_client_absent(mvm, vif); 3915 3916 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int, 3917 apply_time); 3918 if (mvmvif->bf_data.bf_enabled) { 3919 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0); 3920 if (ret) 3921 goto out_unlock; 3922 } 3923 3924 break; 3925 default: 3926 break; 3927 } 3928 3929 mvmvif->ps_disabled = true; 3930 3931 ret = iwl_mvm_power_update_ps(mvm); 3932 if (ret) 3933 goto out_unlock; 3934 3935 /* we won't be on this channel any longer */ 3936 iwl_mvm_teardown_tdls_peers(mvm); 3937 3938 out_unlock: 3939 mutex_unlock(&mvm->mutex); 3940 3941 return ret; 3942 } 3943 3944 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw, 3945 struct ieee80211_vif *vif) 3946 { 3947 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 3948 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 3949 int ret; 3950 3951 mutex_lock(&mvm->mutex); 3952 3953 if (mvmvif->csa_failed) { 3954 mvmvif->csa_failed = false; 3955 ret = -EIO; 3956 goto out_unlock; 3957 } 3958 3959 if (vif->type == NL80211_IFTYPE_STATION) { 3960 struct iwl_mvm_sta *mvmsta; 3961 3962 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, 3963 mvmvif->ap_sta_id); 3964 3965 if (WARN_ON(!mvmsta)) { 3966 ret = -EIO; 3967 goto out_unlock; 3968 } 3969 3970 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false); 3971 3972 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL); 3973 3974 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0); 3975 if (ret) 3976 goto out_unlock; 3977 3978 iwl_mvm_stop_session_protection(mvm, vif); 3979 } 3980 3981 mvmvif->ps_disabled = false; 3982 3983 ret = iwl_mvm_power_update_ps(mvm); 3984 3985 out_unlock: 3986 mutex_unlock(&mvm->mutex); 3987 3988 return ret; 3989 } 3990 3991 static void iwl_mvm_flush_no_vif(struct iwl_mvm *mvm, u32 queues, bool drop) 3992 { 3993 int i; 3994 3995 if (!iwl_mvm_has_new_tx_api(mvm)) { 3996 if (drop) { 3997 mutex_lock(&mvm->mutex); 3998 iwl_mvm_flush_tx_path(mvm, 3999 iwl_mvm_flushable_queues(mvm) & queues, 0); 4000 mutex_unlock(&mvm->mutex); 4001 } else { 4002 iwl_trans_wait_tx_queues_empty(mvm->trans, queues); 4003 } 4004 return; 4005 } 4006 4007 mutex_lock(&mvm->mutex); 4008 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 4009 struct ieee80211_sta *sta; 4010 4011 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 4012 lockdep_is_held(&mvm->mutex)); 4013 if (IS_ERR_OR_NULL(sta)) 4014 continue; 4015 4016 if (drop) 4017 iwl_mvm_flush_sta_tids(mvm, i, 0xFF, 0); 4018 else 4019 iwl_mvm_wait_sta_queues_empty(mvm, 4020 iwl_mvm_sta_from_mac80211(sta)); 4021 } 4022 mutex_unlock(&mvm->mutex); 4023 } 4024 4025 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw, 4026 struct ieee80211_vif *vif, u32 queues, bool drop) 4027 { 4028 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 4029 struct iwl_mvm_vif *mvmvif; 4030 struct iwl_mvm_sta *mvmsta; 4031 struct ieee80211_sta *sta; 4032 int i; 4033 u32 msk = 0; 4034 4035 if (!vif) { 4036 iwl_mvm_flush_no_vif(mvm, queues, drop); 4037 return; 4038 } 4039 4040 if (vif->type != NL80211_IFTYPE_STATION) 4041 return; 4042 4043 /* Make sure we're done with the deferred traffic before flushing */ 4044 flush_work(&mvm->add_stream_wk); 4045 4046 mutex_lock(&mvm->mutex); 4047 mvmvif = iwl_mvm_vif_from_mac80211(vif); 4048 4049 /* flush the AP-station and all TDLS peers */ 4050 for (i = 0; i < ARRAY_SIZE(mvm->fw_id_to_mac_id); i++) { 4051 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i], 4052 lockdep_is_held(&mvm->mutex)); 4053 if (IS_ERR_OR_NULL(sta)) 4054 continue; 4055 4056 mvmsta = iwl_mvm_sta_from_mac80211(sta); 4057 if (mvmsta->vif != vif) 4058 continue; 4059 4060 /* make sure only TDLS peers or the AP are flushed */ 4061 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls); 4062 4063 if (drop) { 4064 if (iwl_mvm_flush_sta(mvm, mvmsta, false, 0)) 4065 IWL_ERR(mvm, "flush request fail\n"); 4066 } else { 4067 msk |= mvmsta->tfd_queue_msk; 4068 if (iwl_mvm_has_new_tx_api(mvm)) 4069 iwl_mvm_wait_sta_queues_empty(mvm, mvmsta); 4070 } 4071 } 4072 4073 mutex_unlock(&mvm->mutex); 4074 4075 /* this can take a while, and we may need/want other operations 4076 * to succeed while doing this, so do it without the mutex held 4077 */ 4078 if (!drop && !iwl_mvm_has_new_tx_api(mvm)) 4079 iwl_trans_wait_tx_queues_empty(mvm->trans, msk); 4080 } 4081 4082 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx, 4083 struct survey_info *survey) 4084 { 4085 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 4086 int ret; 4087 4088 memset(survey, 0, sizeof(*survey)); 4089 4090 /* only support global statistics right now */ 4091 if (idx != 0) 4092 return -ENOENT; 4093 4094 if (!fw_has_capa(&mvm->fw->ucode_capa, 4095 IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS)) 4096 return -ENOENT; 4097 4098 mutex_lock(&mvm->mutex); 4099 4100 if (iwl_mvm_firmware_running(mvm)) { 4101 ret = iwl_mvm_request_statistics(mvm, false); 4102 if (ret) 4103 goto out; 4104 } 4105 4106 survey->filled = SURVEY_INFO_TIME | 4107 SURVEY_INFO_TIME_RX | 4108 SURVEY_INFO_TIME_TX | 4109 SURVEY_INFO_TIME_SCAN; 4110 survey->time = mvm->accu_radio_stats.on_time_rf + 4111 mvm->radio_stats.on_time_rf; 4112 do_div(survey->time, USEC_PER_MSEC); 4113 4114 survey->time_rx = mvm->accu_radio_stats.rx_time + 4115 mvm->radio_stats.rx_time; 4116 do_div(survey->time_rx, USEC_PER_MSEC); 4117 4118 survey->time_tx = mvm->accu_radio_stats.tx_time + 4119 mvm->radio_stats.tx_time; 4120 do_div(survey->time_tx, USEC_PER_MSEC); 4121 4122 survey->time_scan = mvm->accu_radio_stats.on_time_scan + 4123 mvm->radio_stats.on_time_scan; 4124 do_div(survey->time_scan, USEC_PER_MSEC); 4125 4126 ret = 0; 4127 out: 4128 mutex_unlock(&mvm->mutex); 4129 return ret; 4130 } 4131 4132 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw, 4133 struct ieee80211_vif *vif, 4134 struct ieee80211_sta *sta, 4135 struct station_info *sinfo) 4136 { 4137 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 4138 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 4139 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); 4140 4141 if (mvmsta->avg_energy) { 4142 sinfo->signal_avg = mvmsta->avg_energy; 4143 sinfo->filled |= BIT(NL80211_STA_INFO_SIGNAL_AVG); 4144 } 4145 4146 if (!fw_has_capa(&mvm->fw->ucode_capa, 4147 IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS)) 4148 return; 4149 4150 /* if beacon filtering isn't on mac80211 does it anyway */ 4151 if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER)) 4152 return; 4153 4154 if (!vif->bss_conf.assoc) 4155 return; 4156 4157 mutex_lock(&mvm->mutex); 4158 4159 if (mvmvif->ap_sta_id != mvmsta->sta_id) 4160 goto unlock; 4161 4162 if (iwl_mvm_request_statistics(mvm, false)) 4163 goto unlock; 4164 4165 sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons + 4166 mvmvif->beacon_stats.accu_num_beacons; 4167 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX); 4168 if (mvmvif->beacon_stats.avg_signal) { 4169 /* firmware only reports a value after RXing a few beacons */ 4170 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal; 4171 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG); 4172 } 4173 unlock: 4174 mutex_unlock(&mvm->mutex); 4175 } 4176 4177 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm, 4178 struct ieee80211_vif *vif, 4179 const struct ieee80211_event *event) 4180 { 4181 #define CHECK_MLME_TRIGGER(_cnt, _fmt...) \ 4182 do { \ 4183 if ((trig_mlme->_cnt) && --(trig_mlme->_cnt)) \ 4184 break; \ 4185 iwl_fw_dbg_collect_trig(&(mvm)->fwrt, trig, _fmt); \ 4186 } while (0) 4187 4188 struct iwl_fw_dbg_trigger_tlv *trig; 4189 struct iwl_fw_dbg_trigger_mlme *trig_mlme; 4190 4191 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME)) 4192 return; 4193 4194 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME); 4195 trig_mlme = (void *)trig->data; 4196 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 4197 ieee80211_vif_to_wdev(vif), trig)) 4198 return; 4199 4200 if (event->u.mlme.data == ASSOC_EVENT) { 4201 if (event->u.mlme.status == MLME_DENIED) 4202 CHECK_MLME_TRIGGER(stop_assoc_denied, 4203 "DENIED ASSOC: reason %d", 4204 event->u.mlme.reason); 4205 else if (event->u.mlme.status == MLME_TIMEOUT) 4206 CHECK_MLME_TRIGGER(stop_assoc_timeout, 4207 "ASSOC TIMEOUT"); 4208 } else if (event->u.mlme.data == AUTH_EVENT) { 4209 if (event->u.mlme.status == MLME_DENIED) 4210 CHECK_MLME_TRIGGER(stop_auth_denied, 4211 "DENIED AUTH: reason %d", 4212 event->u.mlme.reason); 4213 else if (event->u.mlme.status == MLME_TIMEOUT) 4214 CHECK_MLME_TRIGGER(stop_auth_timeout, 4215 "AUTH TIMEOUT"); 4216 } else if (event->u.mlme.data == DEAUTH_RX_EVENT) { 4217 CHECK_MLME_TRIGGER(stop_rx_deauth, 4218 "DEAUTH RX %d", event->u.mlme.reason); 4219 } else if (event->u.mlme.data == DEAUTH_TX_EVENT) { 4220 CHECK_MLME_TRIGGER(stop_tx_deauth, 4221 "DEAUTH TX %d", event->u.mlme.reason); 4222 } 4223 #undef CHECK_MLME_TRIGGER 4224 } 4225 4226 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm, 4227 struct ieee80211_vif *vif, 4228 const struct ieee80211_event *event) 4229 { 4230 struct iwl_fw_dbg_trigger_tlv *trig; 4231 struct iwl_fw_dbg_trigger_ba *ba_trig; 4232 4233 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) 4234 return; 4235 4236 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); 4237 ba_trig = (void *)trig->data; 4238 if (!iwl_fw_dbg_trigger_check_stop(&mvm->fwrt, 4239 ieee80211_vif_to_wdev(vif), trig)) 4240 return; 4241 4242 if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid))) 4243 return; 4244 4245 iwl_fw_dbg_collect_trig(&mvm->fwrt, trig, 4246 "BAR received from %pM, tid %d, ssn %d", 4247 event->u.ba.sta->addr, event->u.ba.tid, 4248 event->u.ba.ssn); 4249 } 4250 4251 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw, 4252 struct ieee80211_vif *vif, 4253 const struct ieee80211_event *event) 4254 { 4255 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 4256 4257 switch (event->type) { 4258 case MLME_EVENT: 4259 iwl_mvm_event_mlme_callback(mvm, vif, event); 4260 break; 4261 case BAR_RX_EVENT: 4262 iwl_mvm_event_bar_rx_callback(mvm, vif, event); 4263 break; 4264 case BA_FRAME_TIMEOUT: 4265 iwl_mvm_event_frame_timeout_callback(mvm, vif, event->u.ba.sta, 4266 event->u.ba.tid); 4267 break; 4268 default: 4269 break; 4270 } 4271 } 4272 4273 void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm *mvm, 4274 struct iwl_mvm_internal_rxq_notif *notif, 4275 u32 size) 4276 { 4277 u32 qmask = BIT(mvm->trans->num_rx_queues) - 1; 4278 int ret; 4279 4280 lockdep_assert_held(&mvm->mutex); 4281 4282 if (!iwl_mvm_has_new_rx_api(mvm)) 4283 return; 4284 4285 notif->cookie = mvm->queue_sync_cookie; 4286 4287 if (notif->sync) 4288 atomic_set(&mvm->queue_sync_counter, 4289 mvm->trans->num_rx_queues); 4290 4291 /* TODO - remove this when we have RXQ config API */ 4292 if (mvm->trans->cfg->device_family == IWL_DEVICE_FAMILY_22000) { 4293 qmask = BIT(0); 4294 if (notif->sync) 4295 atomic_set(&mvm->queue_sync_counter, 1); 4296 } 4297 4298 ret = iwl_mvm_notify_rx_queue(mvm, qmask, (u8 *)notif, size); 4299 if (ret) { 4300 IWL_ERR(mvm, "Failed to trigger RX queues sync (%d)\n", ret); 4301 goto out; 4302 } 4303 4304 if (notif->sync) { 4305 ret = wait_event_timeout(mvm->rx_sync_waitq, 4306 atomic_read(&mvm->queue_sync_counter) == 0 || 4307 iwl_mvm_is_radio_killed(mvm), 4308 HZ); 4309 WARN_ON_ONCE(!ret && !iwl_mvm_is_radio_killed(mvm)); 4310 } 4311 4312 out: 4313 atomic_set(&mvm->queue_sync_counter, 0); 4314 mvm->queue_sync_cookie++; 4315 } 4316 4317 static void iwl_mvm_sync_rx_queues(struct ieee80211_hw *hw) 4318 { 4319 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 4320 struct iwl_mvm_internal_rxq_notif data = { 4321 .type = IWL_MVM_RXQ_EMPTY, 4322 .sync = 1, 4323 }; 4324 4325 mutex_lock(&mvm->mutex); 4326 iwl_mvm_sync_rx_queues_internal(mvm, &data, sizeof(data)); 4327 mutex_unlock(&mvm->mutex); 4328 } 4329 4330 const struct ieee80211_ops iwl_mvm_hw_ops = { 4331 .tx = iwl_mvm_mac_tx, 4332 .ampdu_action = iwl_mvm_mac_ampdu_action, 4333 .start = iwl_mvm_mac_start, 4334 .reconfig_complete = iwl_mvm_mac_reconfig_complete, 4335 .stop = iwl_mvm_mac_stop, 4336 .add_interface = iwl_mvm_mac_add_interface, 4337 .remove_interface = iwl_mvm_mac_remove_interface, 4338 .config = iwl_mvm_mac_config, 4339 .prepare_multicast = iwl_mvm_prepare_multicast, 4340 .configure_filter = iwl_mvm_configure_filter, 4341 .config_iface_filter = iwl_mvm_config_iface_filter, 4342 .bss_info_changed = iwl_mvm_bss_info_changed, 4343 .hw_scan = iwl_mvm_mac_hw_scan, 4344 .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan, 4345 .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove, 4346 .sta_state = iwl_mvm_mac_sta_state, 4347 .sta_notify = iwl_mvm_mac_sta_notify, 4348 .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames, 4349 .release_buffered_frames = iwl_mvm_mac_release_buffered_frames, 4350 .set_rts_threshold = iwl_mvm_mac_set_rts_threshold, 4351 .sta_rc_update = iwl_mvm_sta_rc_update, 4352 .conf_tx = iwl_mvm_mac_conf_tx, 4353 .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx, 4354 .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover, 4355 .flush = iwl_mvm_mac_flush, 4356 .sched_scan_start = iwl_mvm_mac_sched_scan_start, 4357 .sched_scan_stop = iwl_mvm_mac_sched_scan_stop, 4358 .set_key = iwl_mvm_mac_set_key, 4359 .update_tkip_key = iwl_mvm_mac_update_tkip_key, 4360 .remain_on_channel = iwl_mvm_roc, 4361 .cancel_remain_on_channel = iwl_mvm_cancel_roc, 4362 .add_chanctx = iwl_mvm_add_chanctx, 4363 .remove_chanctx = iwl_mvm_remove_chanctx, 4364 .change_chanctx = iwl_mvm_change_chanctx, 4365 .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx, 4366 .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx, 4367 .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx, 4368 4369 .start_ap = iwl_mvm_start_ap_ibss, 4370 .stop_ap = iwl_mvm_stop_ap_ibss, 4371 .join_ibss = iwl_mvm_start_ap_ibss, 4372 .leave_ibss = iwl_mvm_stop_ap_ibss, 4373 4374 .tx_last_beacon = iwl_mvm_tx_last_beacon, 4375 4376 .set_tim = iwl_mvm_set_tim, 4377 4378 .channel_switch = iwl_mvm_channel_switch, 4379 .pre_channel_switch = iwl_mvm_pre_channel_switch, 4380 .post_channel_switch = iwl_mvm_post_channel_switch, 4381 4382 .tdls_channel_switch = iwl_mvm_tdls_channel_switch, 4383 .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch, 4384 .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch, 4385 4386 .event_callback = iwl_mvm_mac_event_callback, 4387 4388 .sync_rx_queues = iwl_mvm_sync_rx_queues, 4389 4390 CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd) 4391 4392 #ifdef CONFIG_PM_SLEEP 4393 /* look at d3.c */ 4394 .suspend = iwl_mvm_suspend, 4395 .resume = iwl_mvm_resume, 4396 .set_wakeup = iwl_mvm_set_wakeup, 4397 .set_rekey_data = iwl_mvm_set_rekey_data, 4398 #if IS_ENABLED(CONFIG_IPV6) 4399 .ipv6_addr_change = iwl_mvm_ipv6_addr_change, 4400 #endif 4401 .set_default_unicast_key = iwl_mvm_set_default_unicast_key, 4402 #endif 4403 .get_survey = iwl_mvm_mac_get_survey, 4404 .sta_statistics = iwl_mvm_mac_sta_statistics, 4405 #ifdef CONFIG_IWLWIFI_DEBUGFS 4406 .sta_add_debugfs = iwl_mvm_sta_add_debugfs, 4407 #endif 4408 }; 4409