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 - 2014 Intel Mobile Communications GmbH 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of version 2 of the GNU General Public License as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 23 * USA 24 * 25 * The full GNU General Public License is included in this distribution 26 * in the file called COPYING. 27 * 28 * Contact Information: 29 * Intel Linux Wireless <ilw@linux.intel.com> 30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 31 * 32 * BSD LICENSE 33 * 34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 42 * * Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * * Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in 46 * the documentation and/or other materials provided with the 47 * distribution. 48 * * Neither the name Intel Corporation nor the names of its 49 * contributors may be used to endorse or promote products derived 50 * from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 63 * 64 *****************************************************************************/ 65 66#include <linux/etherdevice.h> 67#include <linux/ip.h> 68#include <linux/fs.h> 69#include <net/cfg80211.h> 70#include <net/ipv6.h> 71#include <net/tcp.h> 72#include <net/addrconf.h> 73#include "iwl-modparams.h" 74#include "fw-api.h" 75#include "mvm.h" 76 77void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw, 78 struct ieee80211_vif *vif, 79 struct cfg80211_gtk_rekey_data *data) 80{ 81 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 82 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 83 84 if (iwlwifi_mod_params.sw_crypto) 85 return; 86 87 mutex_lock(&mvm->mutex); 88 89 memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN); 90 memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN); 91 mvmvif->rekey_data.replay_ctr = 92 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 93 mvmvif->rekey_data.valid = true; 94 95 mutex_unlock(&mvm->mutex); 96} 97 98#if IS_ENABLED(CONFIG_IPV6) 99void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw, 100 struct ieee80211_vif *vif, 101 struct inet6_dev *idev) 102{ 103 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 104 struct inet6_ifaddr *ifa; 105 int idx = 0; 106 107 read_lock_bh(&idev->lock); 108 list_for_each_entry(ifa, &idev->addr_list, if_list) { 109 mvmvif->target_ipv6_addrs[idx] = ifa->addr; 110 idx++; 111 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX) 112 break; 113 } 114 read_unlock_bh(&idev->lock); 115 116 mvmvif->num_target_ipv6_addrs = idx; 117} 118#endif 119 120void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw, 121 struct ieee80211_vif *vif, int idx) 122{ 123 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 124 125 mvmvif->tx_key_idx = idx; 126} 127 128static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out) 129{ 130 int i; 131 132 for (i = 0; i < IWL_P1K_SIZE; i++) 133 out[i] = cpu_to_le16(p1k[i]); 134} 135 136struct wowlan_key_data { 137 struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc; 138 struct iwl_wowlan_tkip_params_cmd *tkip; 139 bool error, use_rsc_tsc, use_tkip; 140 int wep_key_idx; 141}; 142 143static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw, 144 struct ieee80211_vif *vif, 145 struct ieee80211_sta *sta, 146 struct ieee80211_key_conf *key, 147 void *_data) 148{ 149 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 150 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 151 struct wowlan_key_data *data = _data; 152 struct aes_sc *aes_sc, *aes_tx_sc = NULL; 153 struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL; 154 struct iwl_p1k_cache *rx_p1ks; 155 u8 *rx_mic_key; 156 struct ieee80211_key_seq seq; 157 u32 cur_rx_iv32 = 0; 158 u16 p1k[IWL_P1K_SIZE]; 159 int ret, i; 160 161 mutex_lock(&mvm->mutex); 162 163 switch (key->cipher) { 164 case WLAN_CIPHER_SUITE_WEP40: 165 case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */ 166 struct { 167 struct iwl_mvm_wep_key_cmd wep_key_cmd; 168 struct iwl_mvm_wep_key wep_key; 169 } __packed wkc = { 170 .wep_key_cmd.mac_id_n_color = 171 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 172 mvmvif->color)), 173 .wep_key_cmd.num_keys = 1, 174 /* firmware sets STA_KEY_FLG_WEP_13BYTES */ 175 .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP, 176 .wep_key.key_index = key->keyidx, 177 .wep_key.key_size = key->keylen, 178 }; 179 180 /* 181 * This will fail -- the key functions don't set support 182 * pairwise WEP keys. However, that's better than silently 183 * failing WoWLAN. Or maybe not? 184 */ 185 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) 186 break; 187 188 memcpy(&wkc.wep_key.key[3], key->key, key->keylen); 189 if (key->keyidx == mvmvif->tx_key_idx) { 190 /* TX key must be at offset 0 */ 191 wkc.wep_key.key_offset = 0; 192 } else { 193 /* others start at 1 */ 194 data->wep_key_idx++; 195 wkc.wep_key.key_offset = data->wep_key_idx; 196 } 197 198 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0, sizeof(wkc), &wkc); 199 data->error = ret != 0; 200 201 mvm->ptk_ivlen = key->iv_len; 202 mvm->ptk_icvlen = key->icv_len; 203 mvm->gtk_ivlen = key->iv_len; 204 mvm->gtk_icvlen = key->icv_len; 205 206 /* don't upload key again */ 207 goto out_unlock; 208 } 209 default: 210 data->error = true; 211 goto out_unlock; 212 case WLAN_CIPHER_SUITE_AES_CMAC: 213 /* 214 * Ignore CMAC keys -- the WoWLAN firmware doesn't support them 215 * but we also shouldn't abort suspend due to that. It does have 216 * support for the IGTK key renewal, but doesn't really use the 217 * IGTK for anything. This means we could spuriously wake up or 218 * be deauthenticated, but that was considered acceptable. 219 */ 220 goto out_unlock; 221 case WLAN_CIPHER_SUITE_TKIP: 222 if (sta) { 223 tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc; 224 tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc; 225 226 rx_p1ks = data->tkip->rx_uni; 227 228 ieee80211_get_key_tx_seq(key, &seq); 229 tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16); 230 tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32); 231 232 ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k); 233 iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k); 234 235 memcpy(data->tkip->mic_keys.tx, 236 &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY], 237 IWL_MIC_KEY_SIZE); 238 239 rx_mic_key = data->tkip->mic_keys.rx_unicast; 240 } else { 241 tkip_sc = 242 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc; 243 rx_p1ks = data->tkip->rx_multi; 244 rx_mic_key = data->tkip->mic_keys.rx_mcast; 245 } 246 247 /* 248 * For non-QoS this relies on the fact that both the uCode and 249 * mac80211 use TID 0 (as they need to to avoid replay attacks) 250 * for checking the IV in the frames. 251 */ 252 for (i = 0; i < IWL_NUM_RSC; i++) { 253 ieee80211_get_key_rx_seq(key, i, &seq); 254 tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16); 255 tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32); 256 /* wrapping isn't allowed, AP must rekey */ 257 if (seq.tkip.iv32 > cur_rx_iv32) 258 cur_rx_iv32 = seq.tkip.iv32; 259 } 260 261 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid, 262 cur_rx_iv32, p1k); 263 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k); 264 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid, 265 cur_rx_iv32 + 1, p1k); 266 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k); 267 268 memcpy(rx_mic_key, 269 &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY], 270 IWL_MIC_KEY_SIZE); 271 272 data->use_tkip = true; 273 data->use_rsc_tsc = true; 274 break; 275 case WLAN_CIPHER_SUITE_CCMP: 276 if (sta) { 277 u8 *pn = seq.ccmp.pn; 278 279 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc; 280 aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc; 281 282 ieee80211_get_key_tx_seq(key, &seq); 283 aes_tx_sc->pn = cpu_to_le64((u64)pn[5] | 284 ((u64)pn[4] << 8) | 285 ((u64)pn[3] << 16) | 286 ((u64)pn[2] << 24) | 287 ((u64)pn[1] << 32) | 288 ((u64)pn[0] << 40)); 289 } else { 290 aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc; 291 } 292 293 /* 294 * For non-QoS this relies on the fact that both the uCode and 295 * mac80211 use TID 0 for checking the IV in the frames. 296 */ 297 for (i = 0; i < IWL_NUM_RSC; i++) { 298 u8 *pn = seq.ccmp.pn; 299 300 ieee80211_get_key_rx_seq(key, i, &seq); 301 aes_sc[i].pn = cpu_to_le64((u64)pn[5] | 302 ((u64)pn[4] << 8) | 303 ((u64)pn[3] << 16) | 304 ((u64)pn[2] << 24) | 305 ((u64)pn[1] << 32) | 306 ((u64)pn[0] << 40)); 307 } 308 data->use_rsc_tsc = true; 309 break; 310 } 311 312 /* 313 * The D3 firmware hardcodes the key offset 0 as the key it uses 314 * to transmit packets to the AP, i.e. the PTK. 315 */ 316 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) { 317 key->hw_key_idx = 0; 318 mvm->ptk_ivlen = key->iv_len; 319 mvm->ptk_icvlen = key->icv_len; 320 } else { 321 /* 322 * firmware only supports TSC/RSC for a single key, 323 * so if there are multiple keep overwriting them 324 * with new ones -- this relies on mac80211 doing 325 * list_add_tail(). 326 */ 327 key->hw_key_idx = 1; 328 mvm->gtk_ivlen = key->iv_len; 329 mvm->gtk_icvlen = key->icv_len; 330 } 331 332 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true); 333 data->error = ret != 0; 334out_unlock: 335 mutex_unlock(&mvm->mutex); 336} 337 338static int iwl_mvm_send_patterns(struct iwl_mvm *mvm, 339 struct cfg80211_wowlan *wowlan) 340{ 341 struct iwl_wowlan_patterns_cmd *pattern_cmd; 342 struct iwl_host_cmd cmd = { 343 .id = WOWLAN_PATTERNS, 344 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 345 }; 346 int i, err; 347 348 if (!wowlan->n_patterns) 349 return 0; 350 351 cmd.len[0] = sizeof(*pattern_cmd) + 352 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern); 353 354 pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL); 355 if (!pattern_cmd) 356 return -ENOMEM; 357 358 pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns); 359 360 for (i = 0; i < wowlan->n_patterns; i++) { 361 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8); 362 363 memcpy(&pattern_cmd->patterns[i].mask, 364 wowlan->patterns[i].mask, mask_len); 365 memcpy(&pattern_cmd->patterns[i].pattern, 366 wowlan->patterns[i].pattern, 367 wowlan->patterns[i].pattern_len); 368 pattern_cmd->patterns[i].mask_size = mask_len; 369 pattern_cmd->patterns[i].pattern_size = 370 wowlan->patterns[i].pattern_len; 371 } 372 373 cmd.data[0] = pattern_cmd; 374 err = iwl_mvm_send_cmd(mvm, &cmd); 375 kfree(pattern_cmd); 376 return err; 377} 378 379enum iwl_mvm_tcp_packet_type { 380 MVM_TCP_TX_SYN, 381 MVM_TCP_RX_SYNACK, 382 MVM_TCP_TX_DATA, 383 MVM_TCP_RX_ACK, 384 MVM_TCP_RX_WAKE, 385 MVM_TCP_TX_FIN, 386}; 387 388static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr) 389{ 390 __sum16 check = tcp_v4_check(len, saddr, daddr, 0); 391 return cpu_to_le16(be16_to_cpu((__force __be16)check)); 392} 393 394static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif, 395 struct cfg80211_wowlan_tcp *tcp, 396 void *_pkt, u8 *mask, 397 __le16 *pseudo_hdr_csum, 398 enum iwl_mvm_tcp_packet_type ptype) 399{ 400 struct { 401 struct ethhdr eth; 402 struct iphdr ip; 403 struct tcphdr tcp; 404 u8 data[]; 405 } __packed *pkt = _pkt; 406 u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr); 407 int i; 408 409 pkt->eth.h_proto = cpu_to_be16(ETH_P_IP), 410 pkt->ip.version = 4; 411 pkt->ip.ihl = 5; 412 pkt->ip.protocol = IPPROTO_TCP; 413 414 switch (ptype) { 415 case MVM_TCP_TX_SYN: 416 case MVM_TCP_TX_DATA: 417 case MVM_TCP_TX_FIN: 418 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN); 419 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN); 420 pkt->ip.ttl = 128; 421 pkt->ip.saddr = tcp->src; 422 pkt->ip.daddr = tcp->dst; 423 pkt->tcp.source = cpu_to_be16(tcp->src_port); 424 pkt->tcp.dest = cpu_to_be16(tcp->dst_port); 425 /* overwritten for TX SYN later */ 426 pkt->tcp.doff = sizeof(struct tcphdr) / 4; 427 pkt->tcp.window = cpu_to_be16(65000); 428 break; 429 case MVM_TCP_RX_SYNACK: 430 case MVM_TCP_RX_ACK: 431 case MVM_TCP_RX_WAKE: 432 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN); 433 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN); 434 pkt->ip.saddr = tcp->dst; 435 pkt->ip.daddr = tcp->src; 436 pkt->tcp.source = cpu_to_be16(tcp->dst_port); 437 pkt->tcp.dest = cpu_to_be16(tcp->src_port); 438 break; 439 default: 440 WARN_ON(1); 441 return; 442 } 443 444 switch (ptype) { 445 case MVM_TCP_TX_SYN: 446 /* firmware assumes 8 option bytes - 8 NOPs for now */ 447 memset(pkt->data, 0x01, 8); 448 ip_tot_len += 8; 449 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4; 450 pkt->tcp.syn = 1; 451 break; 452 case MVM_TCP_TX_DATA: 453 ip_tot_len += tcp->payload_len; 454 memcpy(pkt->data, tcp->payload, tcp->payload_len); 455 pkt->tcp.psh = 1; 456 pkt->tcp.ack = 1; 457 break; 458 case MVM_TCP_TX_FIN: 459 pkt->tcp.fin = 1; 460 pkt->tcp.ack = 1; 461 break; 462 case MVM_TCP_RX_SYNACK: 463 pkt->tcp.syn = 1; 464 pkt->tcp.ack = 1; 465 break; 466 case MVM_TCP_RX_ACK: 467 pkt->tcp.ack = 1; 468 break; 469 case MVM_TCP_RX_WAKE: 470 ip_tot_len += tcp->wake_len; 471 pkt->tcp.psh = 1; 472 pkt->tcp.ack = 1; 473 memcpy(pkt->data, tcp->wake_data, tcp->wake_len); 474 break; 475 } 476 477 switch (ptype) { 478 case MVM_TCP_TX_SYN: 479 case MVM_TCP_TX_DATA: 480 case MVM_TCP_TX_FIN: 481 pkt->ip.tot_len = cpu_to_be16(ip_tot_len); 482 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl); 483 break; 484 case MVM_TCP_RX_WAKE: 485 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) { 486 u8 tmp = tcp->wake_mask[i]; 487 mask[i + 6] |= tmp << 6; 488 if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8)) 489 mask[i + 7] = tmp >> 2; 490 } 491 /* fall through for ethernet/IP/TCP headers mask */ 492 case MVM_TCP_RX_SYNACK: 493 case MVM_TCP_RX_ACK: 494 mask[0] = 0xff; /* match ethernet */ 495 /* 496 * match ethernet, ip.version, ip.ihl 497 * the ip.ihl half byte is really masked out by firmware 498 */ 499 mask[1] = 0x7f; 500 mask[2] = 0x80; /* match ip.protocol */ 501 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */ 502 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */ 503 mask[5] = 0x80; /* match tcp flags */ 504 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */ 505 break; 506 }; 507 508 *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr), 509 pkt->ip.saddr, pkt->ip.daddr); 510} 511 512static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm, 513 struct ieee80211_vif *vif, 514 struct cfg80211_wowlan_tcp *tcp) 515{ 516 struct iwl_wowlan_remote_wake_config *cfg; 517 struct iwl_host_cmd cmd = { 518 .id = REMOTE_WAKE_CONFIG_CMD, 519 .len = { sizeof(*cfg), }, 520 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 521 }; 522 int ret; 523 524 if (!tcp) 525 return 0; 526 527 cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); 528 if (!cfg) 529 return -ENOMEM; 530 cmd.data[0] = cfg; 531 532 cfg->max_syn_retries = 10; 533 cfg->max_data_retries = 10; 534 cfg->tcp_syn_ack_timeout = 1; /* seconds */ 535 cfg->tcp_ack_timeout = 1; /* seconds */ 536 537 /* SYN (TX) */ 538 iwl_mvm_build_tcp_packet( 539 vif, tcp, cfg->syn_tx.data, NULL, 540 &cfg->syn_tx.info.tcp_pseudo_header_checksum, 541 MVM_TCP_TX_SYN); 542 cfg->syn_tx.info.tcp_payload_length = 0; 543 544 /* SYN/ACK (RX) */ 545 iwl_mvm_build_tcp_packet( 546 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask, 547 &cfg->synack_rx.info.tcp_pseudo_header_checksum, 548 MVM_TCP_RX_SYNACK); 549 cfg->synack_rx.info.tcp_payload_length = 0; 550 551 /* KEEPALIVE/ACK (TX) */ 552 iwl_mvm_build_tcp_packet( 553 vif, tcp, cfg->keepalive_tx.data, NULL, 554 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum, 555 MVM_TCP_TX_DATA); 556 cfg->keepalive_tx.info.tcp_payload_length = 557 cpu_to_le16(tcp->payload_len); 558 cfg->sequence_number_offset = tcp->payload_seq.offset; 559 /* length must be 0..4, the field is little endian */ 560 cfg->sequence_number_length = tcp->payload_seq.len; 561 cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start); 562 cfg->keepalive_interval = cpu_to_le16(tcp->data_interval); 563 if (tcp->payload_tok.len) { 564 cfg->token_offset = tcp->payload_tok.offset; 565 cfg->token_length = tcp->payload_tok.len; 566 cfg->num_tokens = 567 cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len); 568 memcpy(cfg->tokens, tcp->payload_tok.token_stream, 569 tcp->tokens_size); 570 } else { 571 /* set tokens to max value to almost never run out */ 572 cfg->num_tokens = cpu_to_le16(65535); 573 } 574 575 /* ACK (RX) */ 576 iwl_mvm_build_tcp_packet( 577 vif, tcp, cfg->keepalive_ack_rx.data, 578 cfg->keepalive_ack_rx.rx_mask, 579 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum, 580 MVM_TCP_RX_ACK); 581 cfg->keepalive_ack_rx.info.tcp_payload_length = 0; 582 583 /* WAKEUP (RX) */ 584 iwl_mvm_build_tcp_packet( 585 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask, 586 &cfg->wake_rx.info.tcp_pseudo_header_checksum, 587 MVM_TCP_RX_WAKE); 588 cfg->wake_rx.info.tcp_payload_length = 589 cpu_to_le16(tcp->wake_len); 590 591 /* FIN */ 592 iwl_mvm_build_tcp_packet( 593 vif, tcp, cfg->fin_tx.data, NULL, 594 &cfg->fin_tx.info.tcp_pseudo_header_checksum, 595 MVM_TCP_TX_FIN); 596 cfg->fin_tx.info.tcp_payload_length = 0; 597 598 ret = iwl_mvm_send_cmd(mvm, &cmd); 599 kfree(cfg); 600 601 return ret; 602} 603 604static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 605 struct ieee80211_sta *ap_sta) 606{ 607 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 608 struct ieee80211_chanctx_conf *ctx; 609 u8 chains_static, chains_dynamic; 610 struct cfg80211_chan_def chandef; 611 int ret, i; 612 struct iwl_binding_cmd binding_cmd = {}; 613 struct iwl_time_quota_cmd quota_cmd = {}; 614 u32 status; 615 616 /* add back the PHY */ 617 if (WARN_ON(!mvmvif->phy_ctxt)) 618 return -EINVAL; 619 620 rcu_read_lock(); 621 ctx = rcu_dereference(vif->chanctx_conf); 622 if (WARN_ON(!ctx)) { 623 rcu_read_unlock(); 624 return -EINVAL; 625 } 626 chandef = ctx->def; 627 chains_static = ctx->rx_chains_static; 628 chains_dynamic = ctx->rx_chains_dynamic; 629 rcu_read_unlock(); 630 631 ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef, 632 chains_static, chains_dynamic); 633 if (ret) 634 return ret; 635 636 /* add back the MAC */ 637 mvmvif->uploaded = false; 638 639 if (WARN_ON(!vif->bss_conf.assoc)) 640 return -EINVAL; 641 642 ret = iwl_mvm_mac_ctxt_add(mvm, vif); 643 if (ret) 644 return ret; 645 646 /* add back binding - XXX refactor? */ 647 binding_cmd.id_and_color = 648 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id, 649 mvmvif->phy_ctxt->color)); 650 binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD); 651 binding_cmd.phy = 652 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id, 653 mvmvif->phy_ctxt->color)); 654 binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 655 mvmvif->color)); 656 for (i = 1; i < MAX_MACS_IN_BINDING; i++) 657 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID); 658 659 status = 0; 660 ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD, 661 sizeof(binding_cmd), &binding_cmd, 662 &status); 663 if (ret) { 664 IWL_ERR(mvm, "Failed to add binding: %d\n", ret); 665 return ret; 666 } 667 668 if (status) { 669 IWL_ERR(mvm, "Binding command failed: %u\n", status); 670 return -EIO; 671 } 672 673 ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false); 674 if (ret) 675 return ret; 676 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta); 677 678 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL); 679 if (ret) 680 return ret; 681 682 /* and some quota */ 683 quota_cmd.quotas[0].id_and_color = 684 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id, 685 mvmvif->phy_ctxt->color)); 686 quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA); 687 quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA); 688 689 for (i = 1; i < MAX_BINDINGS; i++) 690 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID); 691 692 ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0, 693 sizeof(quota_cmd), "a_cmd); 694 if (ret) 695 IWL_ERR(mvm, "Failed to send quota: %d\n", ret); 696 697 if (iwl_mvm_is_lar_supported(mvm) && iwl_mvm_init_fw_regd(mvm)) 698 IWL_ERR(mvm, "Failed to initialize D3 LAR information\n"); 699 700 return 0; 701} 702 703static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm, 704 struct ieee80211_vif *vif) 705{ 706 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 707 struct iwl_nonqos_seq_query_cmd query_cmd = { 708 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET), 709 .mac_id_n_color = 710 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 711 mvmvif->color)), 712 }; 713 struct iwl_host_cmd cmd = { 714 .id = NON_QOS_TX_COUNTER_CMD, 715 .flags = CMD_WANT_SKB, 716 }; 717 int err; 718 u32 size; 719 720 cmd.data[0] = &query_cmd; 721 cmd.len[0] = sizeof(query_cmd); 722 723 err = iwl_mvm_send_cmd(mvm, &cmd); 724 if (err) 725 return err; 726 727 size = iwl_rx_packet_payload_len(cmd.resp_pkt); 728 if (size < sizeof(__le16)) { 729 err = -EINVAL; 730 } else { 731 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data); 732 /* firmware returns next, not last-used seqno */ 733 err = (u16) (err - 0x10); 734 } 735 736 iwl_free_resp(&cmd); 737 return err; 738} 739 740void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 741{ 742 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 743 struct iwl_nonqos_seq_query_cmd query_cmd = { 744 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET), 745 .mac_id_n_color = 746 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id, 747 mvmvif->color)), 748 .value = cpu_to_le16(mvmvif->seqno), 749 }; 750 751 /* return if called during restart, not resume from D3 */ 752 if (!mvmvif->seqno_valid) 753 return; 754 755 mvmvif->seqno_valid = false; 756 757 if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0, 758 sizeof(query_cmd), &query_cmd)) 759 IWL_ERR(mvm, "failed to set non-QoS seqno\n"); 760} 761 762static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm) 763{ 764 iwl_mvm_cancel_scan(mvm); 765 766 iwl_trans_stop_device(mvm->trans); 767 768 /* 769 * Set the HW restart bit -- this is mostly true as we're 770 * going to load new firmware and reprogram that, though 771 * the reprogramming is going to be manual to avoid adding 772 * all the MACs that aren't support. 773 * We don't have to clear up everything though because the 774 * reprogramming is manual. When we resume, we'll actually 775 * go through a proper restart sequence again to switch 776 * back to the runtime firmware image. 777 */ 778 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status); 779 780 /* We reprogram keys and shouldn't allocate new key indices */ 781 memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table)); 782 783 mvm->ptk_ivlen = 0; 784 mvm->ptk_icvlen = 0; 785 mvm->ptk_ivlen = 0; 786 mvm->ptk_icvlen = 0; 787 788 return iwl_mvm_load_d3_fw(mvm); 789} 790 791static int 792iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm, 793 struct cfg80211_wowlan *wowlan, 794 struct iwl_wowlan_config_cmd *wowlan_config_cmd, 795 struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif, 796 struct ieee80211_sta *ap_sta) 797{ 798 int ret; 799 struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta); 800 801 /* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */ 802 803 wowlan_config_cmd->is_11n_connection = 804 ap_sta->ht_cap.ht_supported; 805 806 /* Query the last used seqno and set it */ 807 ret = iwl_mvm_get_last_nonqos_seq(mvm, vif); 808 if (ret < 0) 809 return ret; 810 811 wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret); 812 813 iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd); 814 815 if (wowlan->disconnect) 816 wowlan_config_cmd->wakeup_filter |= 817 cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS | 818 IWL_WOWLAN_WAKEUP_LINK_CHANGE); 819 if (wowlan->magic_pkt) 820 wowlan_config_cmd->wakeup_filter |= 821 cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET); 822 if (wowlan->gtk_rekey_failure) 823 wowlan_config_cmd->wakeup_filter |= 824 cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL); 825 if (wowlan->eap_identity_req) 826 wowlan_config_cmd->wakeup_filter |= 827 cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ); 828 if (wowlan->four_way_handshake) 829 wowlan_config_cmd->wakeup_filter |= 830 cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE); 831 if (wowlan->n_patterns) 832 wowlan_config_cmd->wakeup_filter |= 833 cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH); 834 835 if (wowlan->rfkill_release) 836 wowlan_config_cmd->wakeup_filter |= 837 cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT); 838 839 if (wowlan->tcp) { 840 /* 841 * Set the "link change" (really "link lost") flag as well 842 * since that implies losing the TCP connection. 843 */ 844 wowlan_config_cmd->wakeup_filter |= 845 cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS | 846 IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE | 847 IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET | 848 IWL_WOWLAN_WAKEUP_LINK_CHANGE); 849 } 850 851 return 0; 852} 853 854static int 855iwl_mvm_wowlan_config(struct iwl_mvm *mvm, 856 struct cfg80211_wowlan *wowlan, 857 struct iwl_wowlan_config_cmd *wowlan_config_cmd, 858 struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif, 859 struct ieee80211_sta *ap_sta) 860{ 861 struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {}; 862 struct iwl_wowlan_tkip_params_cmd tkip_cmd = {}; 863 struct wowlan_key_data key_data = { 864 .use_rsc_tsc = false, 865 .tkip = &tkip_cmd, 866 .use_tkip = false, 867 }; 868 int ret; 869 870 ret = iwl_mvm_switch_to_d3(mvm); 871 if (ret) 872 return ret; 873 874 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta); 875 if (ret) 876 return ret; 877 878 key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL); 879 if (!key_data.rsc_tsc) 880 return -ENOMEM; 881 882 if (!iwlwifi_mod_params.sw_crypto) { 883 /* 884 * This needs to be unlocked due to lock ordering 885 * constraints. Since we're in the suspend path 886 * that isn't really a problem though. 887 */ 888 mutex_unlock(&mvm->mutex); 889 ieee80211_iter_keys(mvm->hw, vif, 890 iwl_mvm_wowlan_program_keys, 891 &key_data); 892 mutex_lock(&mvm->mutex); 893 if (key_data.error) { 894 ret = -EIO; 895 goto out; 896 } 897 898 if (key_data.use_rsc_tsc) { 899 struct iwl_host_cmd rsc_tsc_cmd = { 900 .id = WOWLAN_TSC_RSC_PARAM, 901 .data[0] = key_data.rsc_tsc, 902 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 903 .len[0] = sizeof(*key_data.rsc_tsc), 904 }; 905 906 ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd); 907 if (ret) 908 goto out; 909 } 910 911 if (key_data.use_tkip) { 912 ret = iwl_mvm_send_cmd_pdu(mvm, 913 WOWLAN_TKIP_PARAM, 914 0, sizeof(tkip_cmd), 915 &tkip_cmd); 916 if (ret) 917 goto out; 918 } 919 920 if (mvmvif->rekey_data.valid) { 921 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd)); 922 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck, 923 NL80211_KCK_LEN); 924 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN); 925 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek, 926 NL80211_KEK_LEN); 927 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN); 928 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr; 929 930 ret = iwl_mvm_send_cmd_pdu(mvm, 931 WOWLAN_KEK_KCK_MATERIAL, 0, 932 sizeof(kek_kck_cmd), 933 &kek_kck_cmd); 934 if (ret) 935 goto out; 936 } 937 } 938 939 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0, 940 sizeof(*wowlan_config_cmd), 941 wowlan_config_cmd); 942 if (ret) 943 goto out; 944 945 ret = iwl_mvm_send_patterns(mvm, wowlan); 946 if (ret) 947 goto out; 948 949 ret = iwl_mvm_send_proto_offload(mvm, vif, false, 0); 950 if (ret) 951 goto out; 952 953 ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp); 954 955out: 956 kfree(key_data.rsc_tsc); 957 return ret; 958} 959 960static int 961iwl_mvm_netdetect_config(struct iwl_mvm *mvm, 962 struct cfg80211_wowlan *wowlan, 963 struct cfg80211_sched_scan_request *nd_config, 964 struct ieee80211_vif *vif) 965{ 966 struct iwl_wowlan_config_cmd wowlan_config_cmd = {}; 967 int ret; 968 969 ret = iwl_mvm_switch_to_d3(mvm); 970 if (ret) 971 return ret; 972 973 /* rfkill release can be either for wowlan or netdetect */ 974 if (wowlan->rfkill_release) 975 wowlan_config_cmd.wakeup_filter |= 976 cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT); 977 978 ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0, 979 sizeof(wowlan_config_cmd), 980 &wowlan_config_cmd); 981 if (ret) 982 return ret; 983 984 ret = iwl_mvm_scan_offload_start(mvm, vif, nd_config, &mvm->nd_ies); 985 if (ret) 986 return ret; 987 988 if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels)) 989 return -EBUSY; 990 991 /* save the sched scan matchsets... */ 992 if (nd_config->n_match_sets) { 993 mvm->nd_match_sets = kmemdup(nd_config->match_sets, 994 sizeof(*nd_config->match_sets) * 995 nd_config->n_match_sets, 996 GFP_KERNEL); 997 if (mvm->nd_match_sets) 998 mvm->n_nd_match_sets = nd_config->n_match_sets; 999 } 1000 1001 /* ...and the sched scan channels for later reporting */ 1002 mvm->nd_channels = kmemdup(nd_config->channels, 1003 sizeof(*nd_config->channels) * 1004 nd_config->n_channels, 1005 GFP_KERNEL); 1006 if (mvm->nd_channels) 1007 mvm->n_nd_channels = nd_config->n_channels; 1008 1009 return 0; 1010} 1011 1012static void iwl_mvm_free_nd(struct iwl_mvm *mvm) 1013{ 1014 kfree(mvm->nd_match_sets); 1015 mvm->nd_match_sets = NULL; 1016 mvm->n_nd_match_sets = 0; 1017 kfree(mvm->nd_channels); 1018 mvm->nd_channels = NULL; 1019 mvm->n_nd_channels = 0; 1020} 1021 1022static int __iwl_mvm_suspend(struct ieee80211_hw *hw, 1023 struct cfg80211_wowlan *wowlan, 1024 bool test) 1025{ 1026 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1027 struct ieee80211_vif *vif = NULL; 1028 struct iwl_mvm_vif *mvmvif = NULL; 1029 struct ieee80211_sta *ap_sta = NULL; 1030 struct iwl_d3_manager_config d3_cfg_cmd_data = { 1031 /* 1032 * Program the minimum sleep time to 10 seconds, as many 1033 * platforms have issues processing a wakeup signal while 1034 * still being in the process of suspending. 1035 */ 1036 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000), 1037 }; 1038 struct iwl_host_cmd d3_cfg_cmd = { 1039 .id = D3_CONFIG_CMD, 1040 .flags = CMD_WANT_SKB, 1041 .data[0] = &d3_cfg_cmd_data, 1042 .len[0] = sizeof(d3_cfg_cmd_data), 1043 }; 1044 int ret; 1045 int len __maybe_unused; 1046 1047 if (!wowlan) { 1048 /* 1049 * mac80211 shouldn't get here, but for D3 test 1050 * it doesn't warrant a warning 1051 */ 1052 WARN_ON(!test); 1053 return -EINVAL; 1054 } 1055 1056 mutex_lock(&mvm->mutex); 1057 1058 vif = iwl_mvm_get_bss_vif(mvm); 1059 if (IS_ERR_OR_NULL(vif)) { 1060 ret = 1; 1061 goto out_noreset; 1062 } 1063 1064 mvmvif = iwl_mvm_vif_from_mac80211(vif); 1065 1066 if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) { 1067 /* if we're not associated, this must be netdetect */ 1068 if (!wowlan->nd_config && !mvm->nd_config) { 1069 ret = 1; 1070 goto out_noreset; 1071 } 1072 1073 ret = iwl_mvm_netdetect_config( 1074 mvm, wowlan, wowlan->nd_config ?: mvm->nd_config, vif); 1075 if (ret) 1076 goto out; 1077 1078 mvm->net_detect = true; 1079 } else { 1080 struct iwl_wowlan_config_cmd wowlan_config_cmd = {}; 1081 1082 ap_sta = rcu_dereference_protected( 1083 mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], 1084 lockdep_is_held(&mvm->mutex)); 1085 if (IS_ERR_OR_NULL(ap_sta)) { 1086 ret = -EINVAL; 1087 goto out_noreset; 1088 } 1089 1090 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd, 1091 vif, mvmvif, ap_sta); 1092 if (ret) 1093 goto out_noreset; 1094 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd, 1095 vif, mvmvif, ap_sta); 1096 if (ret) 1097 goto out; 1098 1099 mvm->net_detect = false; 1100 } 1101 1102 ret = iwl_mvm_power_update_device(mvm); 1103 if (ret) 1104 goto out; 1105 1106 ret = iwl_mvm_power_update_mac(mvm); 1107 if (ret) 1108 goto out; 1109 1110#ifdef CONFIG_IWLWIFI_DEBUGFS 1111 if (mvm->d3_wake_sysassert) 1112 d3_cfg_cmd_data.wakeup_flags |= 1113 cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR); 1114#endif 1115 1116 /* must be last -- this switches firmware state */ 1117 ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd); 1118 if (ret) 1119 goto out; 1120#ifdef CONFIG_IWLWIFI_DEBUGFS 1121 len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt); 1122 if (len >= sizeof(u32)) { 1123 mvm->d3_test_pme_ptr = 1124 le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data); 1125 } 1126#endif 1127 iwl_free_resp(&d3_cfg_cmd); 1128 1129 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status); 1130 1131 iwl_trans_d3_suspend(mvm->trans, test); 1132 out: 1133 if (ret < 0) { 1134 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN); 1135 ieee80211_restart_hw(mvm->hw); 1136 iwl_mvm_free_nd(mvm); 1137 } 1138 out_noreset: 1139 mutex_unlock(&mvm->mutex); 1140 1141 return ret; 1142} 1143 1144static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm) 1145{ 1146 struct iwl_notification_wait wait_d3; 1147 static const u8 d3_notif[] = { D3_CONFIG_CMD }; 1148 int ret; 1149 1150 iwl_init_notification_wait(&mvm->notif_wait, &wait_d3, 1151 d3_notif, ARRAY_SIZE(d3_notif), 1152 NULL, NULL); 1153 1154 ret = iwl_mvm_enter_d0i3(mvm->hw->priv); 1155 if (ret) 1156 goto remove_notif; 1157 1158 ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ); 1159 WARN_ON_ONCE(ret); 1160 return ret; 1161 1162remove_notif: 1163 iwl_remove_notification(&mvm->notif_wait, &wait_d3); 1164 return ret; 1165} 1166 1167int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan) 1168{ 1169 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1170 1171 iwl_trans_suspend(mvm->trans); 1172 if (wowlan->any) { 1173 /* 'any' trigger means d0i3 usage */ 1174 if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) { 1175 int ret = iwl_mvm_enter_d0i3_sync(mvm); 1176 1177 if (ret) 1178 return ret; 1179 } 1180 1181 mutex_lock(&mvm->d0i3_suspend_mutex); 1182 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags); 1183 mutex_unlock(&mvm->d0i3_suspend_mutex); 1184 return 0; 1185 } 1186 1187 return __iwl_mvm_suspend(hw, wowlan, false); 1188} 1189 1190/* converted data from the different status responses */ 1191struct iwl_wowlan_status_data { 1192 u16 pattern_number; 1193 u16 qos_seq_ctr[8]; 1194 u32 wakeup_reasons; 1195 u32 wake_packet_length; 1196 u32 wake_packet_bufsize; 1197 const u8 *wake_packet; 1198}; 1199 1200static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm, 1201 struct ieee80211_vif *vif, 1202 struct iwl_wowlan_status_data *status) 1203{ 1204 struct sk_buff *pkt = NULL; 1205 struct cfg80211_wowlan_wakeup wakeup = { 1206 .pattern_idx = -1, 1207 }; 1208 struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup; 1209 u32 reasons = status->wakeup_reasons; 1210 1211 if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) { 1212 wakeup_report = NULL; 1213 goto report; 1214 } 1215 1216 if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET) 1217 wakeup.magic_pkt = true; 1218 1219 if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN) 1220 wakeup.pattern_idx = 1221 status->pattern_number; 1222 1223 if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON | 1224 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH)) 1225 wakeup.disconnect = true; 1226 1227 if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE) 1228 wakeup.gtk_rekey_failure = true; 1229 1230 if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED) 1231 wakeup.rfkill_release = true; 1232 1233 if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST) 1234 wakeup.eap_identity_req = true; 1235 1236 if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE) 1237 wakeup.four_way_handshake = true; 1238 1239 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS) 1240 wakeup.tcp_connlost = true; 1241 1242 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE) 1243 wakeup.tcp_nomoretokens = true; 1244 1245 if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET) 1246 wakeup.tcp_match = true; 1247 1248 if (status->wake_packet_bufsize) { 1249 int pktsize = status->wake_packet_bufsize; 1250 int pktlen = status->wake_packet_length; 1251 const u8 *pktdata = status->wake_packet; 1252 struct ieee80211_hdr *hdr = (void *)pktdata; 1253 int truncated = pktlen - pktsize; 1254 1255 /* this would be a firmware bug */ 1256 if (WARN_ON_ONCE(truncated < 0)) 1257 truncated = 0; 1258 1259 if (ieee80211_is_data(hdr->frame_control)) { 1260 int hdrlen = ieee80211_hdrlen(hdr->frame_control); 1261 int ivlen = 0, icvlen = 4; /* also FCS */ 1262 1263 pkt = alloc_skb(pktsize, GFP_KERNEL); 1264 if (!pkt) 1265 goto report; 1266 1267 memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen); 1268 pktdata += hdrlen; 1269 pktsize -= hdrlen; 1270 1271 if (ieee80211_has_protected(hdr->frame_control)) { 1272 /* 1273 * This is unlocked and using gtk_i(c)vlen, 1274 * but since everything is under RTNL still 1275 * that's not really a problem - changing 1276 * it would be difficult. 1277 */ 1278 if (is_multicast_ether_addr(hdr->addr1)) { 1279 ivlen = mvm->gtk_ivlen; 1280 icvlen += mvm->gtk_icvlen; 1281 } else { 1282 ivlen = mvm->ptk_ivlen; 1283 icvlen += mvm->ptk_icvlen; 1284 } 1285 } 1286 1287 /* if truncated, FCS/ICV is (partially) gone */ 1288 if (truncated >= icvlen) { 1289 icvlen = 0; 1290 truncated -= icvlen; 1291 } else { 1292 icvlen -= truncated; 1293 truncated = 0; 1294 } 1295 1296 pktsize -= ivlen + icvlen; 1297 pktdata += ivlen; 1298 1299 memcpy(skb_put(pkt, pktsize), pktdata, pktsize); 1300 1301 if (ieee80211_data_to_8023(pkt, vif->addr, vif->type)) 1302 goto report; 1303 wakeup.packet = pkt->data; 1304 wakeup.packet_present_len = pkt->len; 1305 wakeup.packet_len = pkt->len - truncated; 1306 wakeup.packet_80211 = false; 1307 } else { 1308 int fcslen = 4; 1309 1310 if (truncated >= 4) { 1311 truncated -= 4; 1312 fcslen = 0; 1313 } else { 1314 fcslen -= truncated; 1315 truncated = 0; 1316 } 1317 pktsize -= fcslen; 1318 wakeup.packet = status->wake_packet; 1319 wakeup.packet_present_len = pktsize; 1320 wakeup.packet_len = pktlen - truncated; 1321 wakeup.packet_80211 = true; 1322 } 1323 } 1324 1325 report: 1326 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 1327 kfree_skb(pkt); 1328} 1329 1330static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc, 1331 struct ieee80211_key_seq *seq) 1332{ 1333 u64 pn; 1334 1335 pn = le64_to_cpu(sc->pn); 1336 seq->ccmp.pn[0] = pn >> 40; 1337 seq->ccmp.pn[1] = pn >> 32; 1338 seq->ccmp.pn[2] = pn >> 24; 1339 seq->ccmp.pn[3] = pn >> 16; 1340 seq->ccmp.pn[4] = pn >> 8; 1341 seq->ccmp.pn[5] = pn; 1342} 1343 1344static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc, 1345 struct ieee80211_key_seq *seq) 1346{ 1347 seq->tkip.iv32 = le32_to_cpu(sc->iv32); 1348 seq->tkip.iv16 = le16_to_cpu(sc->iv16); 1349} 1350 1351static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs, 1352 struct ieee80211_key_conf *key) 1353{ 1354 int tid; 1355 1356 BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS); 1357 1358 for (tid = 0; tid < IWL_NUM_RSC; tid++) { 1359 struct ieee80211_key_seq seq = {}; 1360 1361 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq); 1362 ieee80211_set_key_rx_seq(key, tid, &seq); 1363 } 1364} 1365 1366static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs, 1367 struct ieee80211_key_conf *key) 1368{ 1369 int tid; 1370 1371 BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS); 1372 1373 for (tid = 0; tid < IWL_NUM_RSC; tid++) { 1374 struct ieee80211_key_seq seq = {}; 1375 1376 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq); 1377 ieee80211_set_key_rx_seq(key, tid, &seq); 1378 } 1379} 1380 1381static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key, 1382 struct iwl_wowlan_status *status) 1383{ 1384 union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc; 1385 1386 switch (key->cipher) { 1387 case WLAN_CIPHER_SUITE_CCMP: 1388 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key); 1389 break; 1390 case WLAN_CIPHER_SUITE_TKIP: 1391 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key); 1392 break; 1393 default: 1394 WARN_ON(1); 1395 } 1396} 1397 1398struct iwl_mvm_d3_gtk_iter_data { 1399 struct iwl_wowlan_status *status; 1400 void *last_gtk; 1401 u32 cipher; 1402 bool find_phase, unhandled_cipher; 1403 int num_keys; 1404}; 1405 1406static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw, 1407 struct ieee80211_vif *vif, 1408 struct ieee80211_sta *sta, 1409 struct ieee80211_key_conf *key, 1410 void *_data) 1411{ 1412 struct iwl_mvm_d3_gtk_iter_data *data = _data; 1413 1414 if (data->unhandled_cipher) 1415 return; 1416 1417 switch (key->cipher) { 1418 case WLAN_CIPHER_SUITE_WEP40: 1419 case WLAN_CIPHER_SUITE_WEP104: 1420 /* ignore WEP completely, nothing to do */ 1421 return; 1422 case WLAN_CIPHER_SUITE_CCMP: 1423 case WLAN_CIPHER_SUITE_TKIP: 1424 /* we support these */ 1425 break; 1426 default: 1427 /* everything else (even CMAC for MFP) - disconnect from AP */ 1428 data->unhandled_cipher = true; 1429 return; 1430 } 1431 1432 data->num_keys++; 1433 1434 /* 1435 * pairwise key - update sequence counters only; 1436 * note that this assumes no TDLS sessions are active 1437 */ 1438 if (sta) { 1439 struct ieee80211_key_seq seq = {}; 1440 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc; 1441 1442 if (data->find_phase) 1443 return; 1444 1445 switch (key->cipher) { 1446 case WLAN_CIPHER_SUITE_CCMP: 1447 iwl_mvm_aes_sc_to_seq(&sc->aes.tsc, &seq); 1448 iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key); 1449 break; 1450 case WLAN_CIPHER_SUITE_TKIP: 1451 iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq); 1452 iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key); 1453 break; 1454 } 1455 ieee80211_set_key_tx_seq(key, &seq); 1456 1457 /* that's it for this key */ 1458 return; 1459 } 1460 1461 if (data->find_phase) { 1462 data->last_gtk = key; 1463 data->cipher = key->cipher; 1464 return; 1465 } 1466 1467 if (data->status->num_of_gtk_rekeys) 1468 ieee80211_remove_key(key); 1469 else if (data->last_gtk == key) 1470 iwl_mvm_set_key_rx_seq(key, data->status); 1471} 1472 1473static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm, 1474 struct ieee80211_vif *vif, 1475 struct iwl_wowlan_status *status) 1476{ 1477 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 1478 struct iwl_mvm_d3_gtk_iter_data gtkdata = { 1479 .status = status, 1480 }; 1481 u32 disconnection_reasons = 1482 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON | 1483 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH; 1484 1485 if (!status || !vif->bss_conf.bssid) 1486 return false; 1487 1488 if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons) 1489 return false; 1490 1491 /* find last GTK that we used initially, if any */ 1492 gtkdata.find_phase = true; 1493 ieee80211_iter_keys(mvm->hw, vif, 1494 iwl_mvm_d3_update_gtks, >kdata); 1495 /* not trying to keep connections with MFP/unhandled ciphers */ 1496 if (gtkdata.unhandled_cipher) 1497 return false; 1498 if (!gtkdata.num_keys) 1499 goto out; 1500 if (!gtkdata.last_gtk) 1501 return false; 1502 1503 /* 1504 * invalidate all other GTKs that might still exist and update 1505 * the one that we used 1506 */ 1507 gtkdata.find_phase = false; 1508 ieee80211_iter_keys(mvm->hw, vif, 1509 iwl_mvm_d3_update_gtks, >kdata); 1510 1511 if (status->num_of_gtk_rekeys) { 1512 struct ieee80211_key_conf *key; 1513 struct { 1514 struct ieee80211_key_conf conf; 1515 u8 key[32]; 1516 } conf = { 1517 .conf.cipher = gtkdata.cipher, 1518 .conf.keyidx = status->gtk.key_index, 1519 }; 1520 1521 switch (gtkdata.cipher) { 1522 case WLAN_CIPHER_SUITE_CCMP: 1523 conf.conf.keylen = WLAN_KEY_LEN_CCMP; 1524 memcpy(conf.conf.key, status->gtk.decrypt_key, 1525 WLAN_KEY_LEN_CCMP); 1526 break; 1527 case WLAN_CIPHER_SUITE_TKIP: 1528 conf.conf.keylen = WLAN_KEY_LEN_TKIP; 1529 memcpy(conf.conf.key, status->gtk.decrypt_key, 16); 1530 /* leave TX MIC key zeroed, we don't use it anyway */ 1531 memcpy(conf.conf.key + 1532 NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY, 1533 status->gtk.tkip_mic_key, 8); 1534 break; 1535 } 1536 1537 key = ieee80211_gtk_rekey_add(vif, &conf.conf); 1538 if (IS_ERR(key)) 1539 return false; 1540 iwl_mvm_set_key_rx_seq(key, status); 1541 } 1542 1543 if (status->num_of_gtk_rekeys) { 1544 __be64 replay_ctr = 1545 cpu_to_be64(le64_to_cpu(status->replay_ctr)); 1546 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid, 1547 (void *)&replay_ctr, GFP_KERNEL); 1548 } 1549 1550out: 1551 mvmvif->seqno_valid = true; 1552 /* +0x10 because the set API expects next-to-use, not last-used */ 1553 mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10; 1554 1555 return true; 1556} 1557 1558static struct iwl_wowlan_status * 1559iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 1560{ 1561 u32 base = mvm->error_event_table; 1562 struct error_table_start { 1563 /* cf. struct iwl_error_event_table */ 1564 u32 valid; 1565 u32 error_id; 1566 } err_info; 1567 struct iwl_host_cmd cmd = { 1568 .id = WOWLAN_GET_STATUSES, 1569 .flags = CMD_WANT_SKB, 1570 }; 1571 struct iwl_wowlan_status *status, *fw_status; 1572 int ret, len, status_size; 1573 1574 iwl_trans_read_mem_bytes(mvm->trans, base, 1575 &err_info, sizeof(err_info)); 1576 1577 if (err_info.valid) { 1578 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n", 1579 err_info.valid, err_info.error_id); 1580 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 1581 struct cfg80211_wowlan_wakeup wakeup = { 1582 .rfkill_release = true, 1583 }; 1584 ieee80211_report_wowlan_wakeup(vif, &wakeup, 1585 GFP_KERNEL); 1586 } 1587 return ERR_PTR(-EIO); 1588 } 1589 1590 /* only for tracing for now */ 1591 ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL); 1592 if (ret) 1593 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret); 1594 1595 ret = iwl_mvm_send_cmd(mvm, &cmd); 1596 if (ret) { 1597 IWL_ERR(mvm, "failed to query status (%d)\n", ret); 1598 return ERR_PTR(ret); 1599 } 1600 1601 /* RF-kill already asserted again... */ 1602 if (!cmd.resp_pkt) { 1603 fw_status = ERR_PTR(-ERFKILL); 1604 goto out_free_resp; 1605 } 1606 1607 status_size = sizeof(*fw_status); 1608 1609 len = iwl_rx_packet_payload_len(cmd.resp_pkt); 1610 if (len < status_size) { 1611 IWL_ERR(mvm, "Invalid WoWLAN status response!\n"); 1612 fw_status = ERR_PTR(-EIO); 1613 goto out_free_resp; 1614 } 1615 1616 status = (void *)cmd.resp_pkt->data; 1617 if (len != (status_size + 1618 ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) { 1619 IWL_ERR(mvm, "Invalid WoWLAN status response!\n"); 1620 fw_status = ERR_PTR(-EIO); 1621 goto out_free_resp; 1622 } 1623 1624 fw_status = kmemdup(status, len, GFP_KERNEL); 1625 1626out_free_resp: 1627 iwl_free_resp(&cmd); 1628 return fw_status; 1629} 1630 1631/* releases the MVM mutex */ 1632static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm, 1633 struct ieee80211_vif *vif) 1634{ 1635 struct iwl_wowlan_status_data status; 1636 struct iwl_wowlan_status *fw_status; 1637 int i; 1638 bool keep; 1639 struct ieee80211_sta *ap_sta; 1640 struct iwl_mvm_sta *mvm_ap_sta; 1641 1642 fw_status = iwl_mvm_get_wakeup_status(mvm, vif); 1643 if (IS_ERR_OR_NULL(fw_status)) 1644 goto out_unlock; 1645 1646 status.pattern_number = le16_to_cpu(fw_status->pattern_number); 1647 for (i = 0; i < 8; i++) 1648 status.qos_seq_ctr[i] = 1649 le16_to_cpu(fw_status->qos_seq_ctr[i]); 1650 status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons); 1651 status.wake_packet_length = 1652 le32_to_cpu(fw_status->wake_packet_length); 1653 status.wake_packet_bufsize = 1654 le32_to_cpu(fw_status->wake_packet_bufsize); 1655 status.wake_packet = fw_status->wake_packet; 1656 1657 /* still at hard-coded place 0 for D3 image */ 1658 ap_sta = rcu_dereference_protected( 1659 mvm->fw_id_to_mac_id[0], 1660 lockdep_is_held(&mvm->mutex)); 1661 if (IS_ERR_OR_NULL(ap_sta)) 1662 goto out_free; 1663 1664 mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta); 1665 for (i = 0; i < IWL_MAX_TID_COUNT; i++) { 1666 u16 seq = status.qos_seq_ctr[i]; 1667 /* firmware stores last-used value, we store next value */ 1668 seq += 0x10; 1669 mvm_ap_sta->tid_data[i].seq_number = seq; 1670 } 1671 1672 /* now we have all the data we need, unlock to avoid mac80211 issues */ 1673 mutex_unlock(&mvm->mutex); 1674 1675 iwl_mvm_report_wakeup_reasons(mvm, vif, &status); 1676 1677 keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status); 1678 1679 kfree(fw_status); 1680 return keep; 1681 1682out_free: 1683 kfree(fw_status); 1684out_unlock: 1685 mutex_unlock(&mvm->mutex); 1686 return false; 1687} 1688 1689struct iwl_mvm_nd_query_results { 1690 u32 matched_profiles; 1691 struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES]; 1692}; 1693 1694static int 1695iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm, 1696 struct iwl_mvm_nd_query_results *results) 1697{ 1698 struct iwl_scan_offload_profiles_query *query; 1699 struct iwl_host_cmd cmd = { 1700 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD, 1701 .flags = CMD_WANT_SKB, 1702 }; 1703 int ret, len; 1704 1705 ret = iwl_mvm_send_cmd(mvm, &cmd); 1706 if (ret) { 1707 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret); 1708 return ret; 1709 } 1710 1711 /* RF-kill already asserted again... */ 1712 if (!cmd.resp_pkt) { 1713 ret = -ERFKILL; 1714 goto out_free_resp; 1715 } 1716 1717 len = iwl_rx_packet_payload_len(cmd.resp_pkt); 1718 if (len < sizeof(*query)) { 1719 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n"); 1720 ret = -EIO; 1721 goto out_free_resp; 1722 } 1723 1724 query = (void *)cmd.resp_pkt->data; 1725 1726 results->matched_profiles = le32_to_cpu(query->matched_profiles); 1727 memcpy(results->matches, query->matches, sizeof(results->matches)); 1728 1729#ifdef CONFIG_IWLWIFI_DEBUGFS 1730 mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done); 1731#endif 1732 1733out_free_resp: 1734 iwl_free_resp(&cmd); 1735 return ret; 1736} 1737 1738static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm, 1739 struct ieee80211_vif *vif) 1740{ 1741 struct cfg80211_wowlan_nd_info *net_detect = NULL; 1742 struct cfg80211_wowlan_wakeup wakeup = { 1743 .pattern_idx = -1, 1744 }; 1745 struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup; 1746 struct iwl_mvm_nd_query_results query; 1747 struct iwl_wowlan_status *fw_status; 1748 unsigned long matched_profiles; 1749 u32 reasons = 0; 1750 int i, j, n_matches, ret; 1751 1752 fw_status = iwl_mvm_get_wakeup_status(mvm, vif); 1753 if (!IS_ERR_OR_NULL(fw_status)) { 1754 reasons = le32_to_cpu(fw_status->wakeup_reasons); 1755 kfree(fw_status); 1756 } 1757 1758 if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED) 1759 wakeup.rfkill_release = true; 1760 1761 if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) 1762 goto out; 1763 1764 ret = iwl_mvm_netdetect_query_results(mvm, &query); 1765 if (ret || !query.matched_profiles) { 1766 wakeup_report = NULL; 1767 goto out; 1768 } 1769 1770 matched_profiles = query.matched_profiles; 1771 if (mvm->n_nd_match_sets) { 1772 n_matches = hweight_long(matched_profiles); 1773 } else { 1774 IWL_ERR(mvm, "no net detect match information available\n"); 1775 n_matches = 0; 1776 } 1777 1778 net_detect = kzalloc(sizeof(*net_detect) + 1779 (n_matches * sizeof(net_detect->matches[0])), 1780 GFP_KERNEL); 1781 if (!net_detect || !n_matches) 1782 goto out_report_nd; 1783 1784 for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) { 1785 struct iwl_scan_offload_profile_match *fw_match; 1786 struct cfg80211_wowlan_nd_match *match; 1787 int n_channels = 0; 1788 1789 fw_match = &query.matches[i]; 1790 1791 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++) 1792 n_channels += hweight8(fw_match->matching_channels[j]); 1793 1794 match = kzalloc(sizeof(*match) + 1795 (n_channels * sizeof(*match->channels)), 1796 GFP_KERNEL); 1797 if (!match) 1798 goto out_report_nd; 1799 1800 net_detect->matches[net_detect->n_matches++] = match; 1801 1802 match->ssid.ssid_len = mvm->nd_match_sets[i].ssid.ssid_len; 1803 memcpy(match->ssid.ssid, mvm->nd_match_sets[i].ssid.ssid, 1804 match->ssid.ssid_len); 1805 1806 if (mvm->n_nd_channels < n_channels) 1807 continue; 1808 1809 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++) 1810 if (fw_match->matching_channels[j / 8] & (BIT(j % 8))) 1811 match->channels[match->n_channels++] = 1812 mvm->nd_channels[j]->center_freq; 1813 } 1814 1815out_report_nd: 1816 wakeup.net_detect = net_detect; 1817out: 1818 iwl_mvm_free_nd(mvm); 1819 1820 mutex_unlock(&mvm->mutex); 1821 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 1822 1823 if (net_detect) { 1824 for (i = 0; i < net_detect->n_matches; i++) 1825 kfree(net_detect->matches[i]); 1826 kfree(net_detect); 1827 } 1828} 1829 1830static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm) 1831{ 1832#ifdef CONFIG_IWLWIFI_DEBUGFS 1833 const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN]; 1834 u32 len = img->sec[IWL_UCODE_SECTION_DATA].len; 1835 u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset; 1836 1837 if (!mvm->store_d3_resume_sram) 1838 return; 1839 1840 if (!mvm->d3_resume_sram) { 1841 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL); 1842 if (!mvm->d3_resume_sram) 1843 return; 1844 } 1845 1846 iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len); 1847#endif 1848} 1849 1850static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac, 1851 struct ieee80211_vif *vif) 1852{ 1853 /* skip the one we keep connection on */ 1854 if (data == vif) 1855 return; 1856 1857 if (vif->type == NL80211_IFTYPE_STATION) 1858 ieee80211_resume_disconnect(vif); 1859} 1860 1861static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test) 1862{ 1863 struct ieee80211_vif *vif = NULL; 1864 int ret; 1865 enum iwl_d3_status d3_status; 1866 bool keep = false; 1867 1868 mutex_lock(&mvm->mutex); 1869 1870 /* get the BSS vif pointer again */ 1871 vif = iwl_mvm_get_bss_vif(mvm); 1872 if (IS_ERR_OR_NULL(vif)) 1873 goto err; 1874 1875 ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test); 1876 if (ret) 1877 goto err; 1878 1879 if (d3_status != IWL_D3_STATUS_ALIVE) { 1880 IWL_INFO(mvm, "Device was reset during suspend\n"); 1881 goto err; 1882 } 1883 1884 /* query SRAM first in case we want event logging */ 1885 iwl_mvm_read_d3_sram(mvm); 1886 1887 /* 1888 * Query the current location and source from the D3 firmware so we 1889 * can play it back when we re-intiailize the D0 firmware 1890 */ 1891 iwl_mvm_update_changed_regdom(mvm); 1892 1893 if (mvm->net_detect) { 1894 iwl_mvm_query_netdetect_reasons(mvm, vif); 1895 /* has unlocked the mutex, so skip that */ 1896 goto out; 1897 } else { 1898 keep = iwl_mvm_query_wakeup_reasons(mvm, vif); 1899#ifdef CONFIG_IWLWIFI_DEBUGFS 1900 if (keep) 1901 mvm->keep_vif = vif; 1902#endif 1903 /* has unlocked the mutex, so skip that */ 1904 goto out_iterate; 1905 } 1906 1907err: 1908 iwl_mvm_free_nd(mvm); 1909 mutex_unlock(&mvm->mutex); 1910 1911out_iterate: 1912 if (!test) 1913 ieee80211_iterate_active_interfaces_rtnl(mvm->hw, 1914 IEEE80211_IFACE_ITER_NORMAL, 1915 iwl_mvm_d3_disconnect_iter, keep ? vif : NULL); 1916 1917out: 1918 /* return 1 to reconfigure the device */ 1919 set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status); 1920 set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status); 1921 1922 /* We always return 1, which causes mac80211 to do a reconfig 1923 * with IEEE80211_RECONFIG_TYPE_RESTART. This type of 1924 * reconfig calls iwl_mvm_restart_complete(), where we unref 1925 * the IWL_MVM_REF_UCODE_DOWN, so we need to take the 1926 * reference here. 1927 */ 1928 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN); 1929 return 1; 1930} 1931 1932int iwl_mvm_resume(struct ieee80211_hw *hw) 1933{ 1934 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1935 1936 iwl_trans_resume(mvm->trans); 1937 1938 if (mvm->hw->wiphy->wowlan_config->any) { 1939 /* 'any' trigger means d0i3 usage */ 1940 if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) { 1941 int ret = iwl_mvm_exit_d0i3(hw->priv); 1942 1943 if (ret) 1944 return ret; 1945 /* 1946 * d0i3 exit will be deferred until reconfig_complete. 1947 * make sure there we are out of d0i3. 1948 */ 1949 } 1950 return 0; 1951 } 1952 1953 return __iwl_mvm_resume(mvm, false); 1954} 1955 1956void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled) 1957{ 1958 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); 1959 1960 device_set_wakeup_enable(mvm->trans->dev, enabled); 1961} 1962 1963#ifdef CONFIG_IWLWIFI_DEBUGFS 1964static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file) 1965{ 1966 struct iwl_mvm *mvm = inode->i_private; 1967 int err; 1968 1969 if (mvm->d3_test_active) 1970 return -EBUSY; 1971 1972 file->private_data = inode->i_private; 1973 1974 ieee80211_stop_queues(mvm->hw); 1975 synchronize_net(); 1976 1977 /* start pseudo D3 */ 1978 rtnl_lock(); 1979 err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true); 1980 rtnl_unlock(); 1981 if (err > 0) 1982 err = -EINVAL; 1983 if (err) { 1984 ieee80211_wake_queues(mvm->hw); 1985 return err; 1986 } 1987 mvm->d3_test_active = true; 1988 mvm->keep_vif = NULL; 1989 return 0; 1990} 1991 1992static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf, 1993 size_t count, loff_t *ppos) 1994{ 1995 struct iwl_mvm *mvm = file->private_data; 1996 u32 pme_asserted; 1997 1998 while (true) { 1999 /* read pme_ptr if available */ 2000 if (mvm->d3_test_pme_ptr) { 2001 pme_asserted = iwl_trans_read_mem32(mvm->trans, 2002 mvm->d3_test_pme_ptr); 2003 if (pme_asserted) 2004 break; 2005 } 2006 2007 if (msleep_interruptible(100)) 2008 break; 2009 } 2010 2011 return 0; 2012} 2013 2014static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac, 2015 struct ieee80211_vif *vif) 2016{ 2017 /* skip the one we keep connection on */ 2018 if (_data == vif) 2019 return; 2020 2021 if (vif->type == NL80211_IFTYPE_STATION) 2022 ieee80211_connection_loss(vif); 2023} 2024 2025static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file) 2026{ 2027 struct iwl_mvm *mvm = inode->i_private; 2028 int remaining_time = 10; 2029 2030 mvm->d3_test_active = false; 2031 rtnl_lock(); 2032 __iwl_mvm_resume(mvm, true); 2033 rtnl_unlock(); 2034 iwl_abort_notification_waits(&mvm->notif_wait); 2035 ieee80211_restart_hw(mvm->hw); 2036 2037 /* wait for restart and disconnect all interfaces */ 2038 while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) && 2039 remaining_time > 0) { 2040 remaining_time--; 2041 msleep(1000); 2042 } 2043 2044 if (remaining_time == 0) 2045 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n"); 2046 2047 ieee80211_iterate_active_interfaces_atomic( 2048 mvm->hw, IEEE80211_IFACE_ITER_NORMAL, 2049 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif); 2050 2051 ieee80211_wake_queues(mvm->hw); 2052 2053 return 0; 2054} 2055 2056const struct file_operations iwl_dbgfs_d3_test_ops = { 2057 .llseek = no_llseek, 2058 .open = iwl_mvm_d3_test_open, 2059 .read = iwl_mvm_d3_test_read, 2060 .release = iwl_mvm_d3_test_release, 2061}; 2062#endif 2063