drivers/net/wireless/iwlwifi/mvm/d3.c

   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  *
  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.
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  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
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  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 - 2015 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.
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  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
  77 void 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)
  99 void 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
 120 void 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
 128 static 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
 136 struct 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
 143 static 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                         u64 pn64;
 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                         pn64 = atomic64_read(&key->tx_pn);
 283                         aes_tx_sc->pn = cpu_to_le64(pn64);
 284                 } else {
 285                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 286                 }
 287
 288                 /*
 289                  * For non-QoS this relies on the fact that both the uCode and
 290                  * mac80211 use TID 0 for checking the IV in the frames.
 291                  */
 292                 for (i = 0; i < IWL_NUM_RSC; i++) {
 293                         u8 *pn = seq.ccmp.pn;
 294
 295                         ieee80211_get_key_rx_seq(key, i, &seq);
 296                         aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
 297                                                    ((u64)pn[4] << 8) |
 298                                                    ((u64)pn[3] << 16) |
 299                                                    ((u64)pn[2] << 24) |
 300                                                    ((u64)pn[1] << 32) |
 301                                                    ((u64)pn[0] << 40));
 302                 }
 303                 data->use_rsc_tsc = true;
 304                 break;
 305         }
 306
 307         /*
 308          * The D3 firmware hardcodes the key offset 0 as the key it uses
 309          * to transmit packets to the AP, i.e. the PTK.
 310          */
 311         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 312                 key->hw_key_idx = 0;
 313                 mvm->ptk_ivlen = key->iv_len;
 314                 mvm->ptk_icvlen = key->icv_len;
 315         } else {
 316                 /*
 317                  * firmware only supports TSC/RSC for a single key,
 318                  * so if there are multiple keep overwriting them
 319                  * with new ones -- this relies on mac80211 doing
 320                  * list_add_tail().
 321                  */
 322                 key->hw_key_idx = 1;
 323                 mvm->gtk_ivlen = key->iv_len;
 324                 mvm->gtk_icvlen = key->icv_len;
 325         }
 326
 327         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 328         data->error = ret != 0;
 329 out_unlock:
 330         mutex_unlock(&mvm->mutex);
 331 }
 332
 333 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 334                                  struct cfg80211_wowlan *wowlan)
 335 {
 336         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 337         struct iwl_host_cmd cmd = {
 338                 .id = WOWLAN_PATTERNS,
 339                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 340         };
 341         int i, err;
 342
 343         if (!wowlan->n_patterns)
 344                 return 0;
 345
 346         cmd.len[0] = sizeof(*pattern_cmd) +
 347                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 348
 349         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 350         if (!pattern_cmd)
 351                 return -ENOMEM;
 352
 353         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 354
 355         for (i = 0; i < wowlan->n_patterns; i++) {
 356                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 357
 358                 memcpy(&pattern_cmd->patterns[i].mask,
 359                        wowlan->patterns[i].mask, mask_len);
 360                 memcpy(&pattern_cmd->patterns[i].pattern,
 361                        wowlan->patterns[i].pattern,
 362                        wowlan->patterns[i].pattern_len);
 363                 pattern_cmd->patterns[i].mask_size = mask_len;
 364                 pattern_cmd->patterns[i].pattern_size =
 365                         wowlan->patterns[i].pattern_len;
 366         }
 367
 368         cmd.data[0] = pattern_cmd;
 369         err = iwl_mvm_send_cmd(mvm, &cmd);
 370         kfree(pattern_cmd);
 371         return err;
 372 }
 373
 374 enum iwl_mvm_tcp_packet_type {
 375         MVM_TCP_TX_SYN,
 376         MVM_TCP_RX_SYNACK,
 377         MVM_TCP_TX_DATA,
 378         MVM_TCP_RX_ACK,
 379         MVM_TCP_RX_WAKE,
 380         MVM_TCP_TX_FIN,
 381 };
 382
 383 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 384 {
 385         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 386         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 387 }
 388
 389 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
 390                                      struct cfg80211_wowlan_tcp *tcp,
 391                                      void *_pkt, u8 *mask,
 392                                      __le16 *pseudo_hdr_csum,
 393                                      enum iwl_mvm_tcp_packet_type ptype)
 394 {
 395         struct {
 396                 struct ethhdr eth;
 397                 struct iphdr ip;
 398                 struct tcphdr tcp;
 399                 u8 data[];
 400         } __packed *pkt = _pkt;
 401         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 402         int i;
 403
 404         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 405         pkt->ip.version = 4;
 406         pkt->ip.ihl = 5;
 407         pkt->ip.protocol = IPPROTO_TCP;
 408
 409         switch (ptype) {
 410         case MVM_TCP_TX_SYN:
 411         case MVM_TCP_TX_DATA:
 412         case MVM_TCP_TX_FIN:
 413                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 414                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 415                 pkt->ip.ttl = 128;
 416                 pkt->ip.saddr = tcp->src;
 417                 pkt->ip.daddr = tcp->dst;
 418                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 419                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 420                 /* overwritten for TX SYN later */
 421                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 422                 pkt->tcp.window = cpu_to_be16(65000);
 423                 break;
 424         case MVM_TCP_RX_SYNACK:
 425         case MVM_TCP_RX_ACK:
 426         case MVM_TCP_RX_WAKE:
 427                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 428                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 429                 pkt->ip.saddr = tcp->dst;
 430                 pkt->ip.daddr = tcp->src;
 431                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 432                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 433                 break;
 434         default:
 435                 WARN_ON(1);
 436                 return;
 437         }
 438
 439         switch (ptype) {
 440         case MVM_TCP_TX_SYN:
 441                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 442                 memset(pkt->data, 0x01, 8);
 443                 ip_tot_len += 8;
 444                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 445                 pkt->tcp.syn = 1;
 446                 break;
 447         case MVM_TCP_TX_DATA:
 448                 ip_tot_len += tcp->payload_len;
 449                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 450                 pkt->tcp.psh = 1;
 451                 pkt->tcp.ack = 1;
 452                 break;
 453         case MVM_TCP_TX_FIN:
 454                 pkt->tcp.fin = 1;
 455                 pkt->tcp.ack = 1;
 456                 break;
 457         case MVM_TCP_RX_SYNACK:
 458                 pkt->tcp.syn = 1;
 459                 pkt->tcp.ack = 1;
 460                 break;
 461         case MVM_TCP_RX_ACK:
 462                 pkt->tcp.ack = 1;
 463                 break;
 464         case MVM_TCP_RX_WAKE:
 465                 ip_tot_len += tcp->wake_len;
 466                 pkt->tcp.psh = 1;
 467                 pkt->tcp.ack = 1;
 468                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 469                 break;
 470         }
 471
 472         switch (ptype) {
 473         case MVM_TCP_TX_SYN:
 474         case MVM_TCP_TX_DATA:
 475         case MVM_TCP_TX_FIN:
 476                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 477                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 478                 break;
 479         case MVM_TCP_RX_WAKE:
 480                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 481                         u8 tmp = tcp->wake_mask[i];
 482                         mask[i + 6] |= tmp << 6;
 483                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 484                                 mask[i + 7] = tmp >> 2;
 485                 }
 486                 /* fall through for ethernet/IP/TCP headers mask */
 487         case MVM_TCP_RX_SYNACK:
 488         case MVM_TCP_RX_ACK:
 489                 mask[0] = 0xff; /* match ethernet */
 490                 /*
 491                  * match ethernet, ip.version, ip.ihl
 492                  * the ip.ihl half byte is really masked out by firmware
 493                  */
 494                 mask[1] = 0x7f;
 495                 mask[2] = 0x80; /* match ip.protocol */
 496                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 497                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 498                 mask[5] = 0x80; /* match tcp flags */
 499                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 500                 break;
 501         };
 502
 503         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 504                                             pkt->ip.saddr, pkt->ip.daddr);
 505 }
 506
 507 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 508                                         struct ieee80211_vif *vif,
 509                                         struct cfg80211_wowlan_tcp *tcp)
 510 {
 511         struct iwl_wowlan_remote_wake_config *cfg;
 512         struct iwl_host_cmd cmd = {
 513                 .id = REMOTE_WAKE_CONFIG_CMD,
 514                 .len = { sizeof(*cfg), },
 515                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 516         };
 517         int ret;
 518
 519         if (!tcp)
 520                 return 0;
 521
 522         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 523         if (!cfg)
 524                 return -ENOMEM;
 525         cmd.data[0] = cfg;
 526
 527         cfg->max_syn_retries = 10;
 528         cfg->max_data_retries = 10;
 529         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 530         cfg->tcp_ack_timeout = 1; /* seconds */
 531
 532         /* SYN (TX) */
 533         iwl_mvm_build_tcp_packet(
 534                 vif, tcp, cfg->syn_tx.data, NULL,
 535                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 536                 MVM_TCP_TX_SYN);
 537         cfg->syn_tx.info.tcp_payload_length = 0;
 538
 539         /* SYN/ACK (RX) */
 540         iwl_mvm_build_tcp_packet(
 541                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 542                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 543                 MVM_TCP_RX_SYNACK);
 544         cfg->synack_rx.info.tcp_payload_length = 0;
 545
 546         /* KEEPALIVE/ACK (TX) */
 547         iwl_mvm_build_tcp_packet(
 548                 vif, tcp, cfg->keepalive_tx.data, NULL,
 549                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 550                 MVM_TCP_TX_DATA);
 551         cfg->keepalive_tx.info.tcp_payload_length =
 552                 cpu_to_le16(tcp->payload_len);
 553         cfg->sequence_number_offset = tcp->payload_seq.offset;
 554         /* length must be 0..4, the field is little endian */
 555         cfg->sequence_number_length = tcp->payload_seq.len;
 556         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 557         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 558         if (tcp->payload_tok.len) {
 559                 cfg->token_offset = tcp->payload_tok.offset;
 560                 cfg->token_length = tcp->payload_tok.len;
 561                 cfg->num_tokens =
 562                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 563                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 564                        tcp->tokens_size);
 565         } else {
 566                 /* set tokens to max value to almost never run out */
 567                 cfg->num_tokens = cpu_to_le16(65535);
 568         }
 569
 570         /* ACK (RX) */
 571         iwl_mvm_build_tcp_packet(
 572                 vif, tcp, cfg->keepalive_ack_rx.data,
 573                 cfg->keepalive_ack_rx.rx_mask,
 574                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 575                 MVM_TCP_RX_ACK);
 576         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 577
 578         /* WAKEUP (RX) */
 579         iwl_mvm_build_tcp_packet(
 580                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 581                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 582                 MVM_TCP_RX_WAKE);
 583         cfg->wake_rx.info.tcp_payload_length =
 584                 cpu_to_le16(tcp->wake_len);
 585
 586         /* FIN */
 587         iwl_mvm_build_tcp_packet(
 588                 vif, tcp, cfg->fin_tx.data, NULL,
 589                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 590                 MVM_TCP_TX_FIN);
 591         cfg->fin_tx.info.tcp_payload_length = 0;
 592
 593         ret = iwl_mvm_send_cmd(mvm, &cmd);
 594         kfree(cfg);
 595
 596         return ret;
 597 }
 598
 599 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 600                                 struct ieee80211_sta *ap_sta)
 601 {
 602         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 603         struct ieee80211_chanctx_conf *ctx;
 604         u8 chains_static, chains_dynamic;
 605         struct cfg80211_chan_def chandef;
 606         int ret, i;
 607         struct iwl_binding_cmd binding_cmd = {};
 608         struct iwl_time_quota_cmd quota_cmd = {};
 609         u32 status;
 610
 611         /* add back the PHY */
 612         if (WARN_ON(!mvmvif->phy_ctxt))
 613                 return -EINVAL;
 614
 615         rcu_read_lock();
 616         ctx = rcu_dereference(vif->chanctx_conf);
 617         if (WARN_ON(!ctx)) {
 618                 rcu_read_unlock();
 619                 return -EINVAL;
 620         }
 621         chandef = ctx->def;
 622         chains_static = ctx->rx_chains_static;
 623         chains_dynamic = ctx->rx_chains_dynamic;
 624         rcu_read_unlock();
 625
 626         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 627                                    chains_static, chains_dynamic);
 628         if (ret)
 629                 return ret;
 630
 631         /* add back the MAC */
 632         mvmvif->uploaded = false;
 633
 634         if (WARN_ON(!vif->bss_conf.assoc))
 635                 return -EINVAL;
 636
 637         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 638         if (ret)
 639                 return ret;
 640
 641         /* add back binding - XXX refactor? */
 642         binding_cmd.id_and_color =
 643                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 644                                                 mvmvif->phy_ctxt->color));
 645         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 646         binding_cmd.phy =
 647                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 648                                                 mvmvif->phy_ctxt->color));
 649         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 650                                                               mvmvif->color));
 651         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 652                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 653
 654         status = 0;
 655         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 656                                           sizeof(binding_cmd), &binding_cmd,
 657                                           &status);
 658         if (ret) {
 659                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 660                 return ret;
 661         }
 662
 663         if (status) {
 664                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 665                 return -EIO;
 666         }
 667
 668         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 669         if (ret)
 670                 return ret;
 671         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 672
 673         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
 674         if (ret)
 675                 return ret;
 676
 677         /* and some quota */
 678         quota_cmd.quotas[0].id_and_color =
 679                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 680                                                 mvmvif->phy_ctxt->color));
 681         quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 682         quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 683
 684         for (i = 1; i < MAX_BINDINGS; i++)
 685                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 686
 687         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 688                                    sizeof(quota_cmd), &quota_cmd);
 689         if (ret)
 690                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 691
 692         if (iwl_mvm_is_lar_supported(mvm) && iwl_mvm_init_fw_regd(mvm))
 693                 IWL_ERR(mvm, "Failed to initialize D3 LAR information\n");
 694
 695         return 0;
 696 }
 697
 698 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 699                                        struct ieee80211_vif *vif)
 700 {
 701         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 702         struct iwl_nonqos_seq_query_cmd query_cmd = {
 703                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 704                 .mac_id_n_color =
 705                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 706                                                         mvmvif->color)),
 707         };
 708         struct iwl_host_cmd cmd = {
 709                 .id = NON_QOS_TX_COUNTER_CMD,
 710                 .flags = CMD_WANT_SKB,
 711         };
 712         int err;
 713         u32 size;
 714
 715         cmd.data[0] = &query_cmd;
 716         cmd.len[0] = sizeof(query_cmd);
 717
 718         err = iwl_mvm_send_cmd(mvm, &cmd);
 719         if (err)
 720                 return err;
 721
 722         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 723         if (size < sizeof(__le16)) {
 724                 err = -EINVAL;
 725         } else {
 726                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 727                 /* firmware returns next, not last-used seqno */
 728                 err = (u16) (err - 0x10);
 729         }
 730
 731         iwl_free_resp(&cmd);
 732         return err;
 733 }
 734
 735 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 736 {
 737         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 738         struct iwl_nonqos_seq_query_cmd query_cmd = {
 739                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 740                 .mac_id_n_color =
 741                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 742                                                         mvmvif->color)),
 743                 .value = cpu_to_le16(mvmvif->seqno),
 744         };
 745
 746         /* return if called during restart, not resume from D3 */
 747         if (!mvmvif->seqno_valid)
 748                 return;
 749
 750         mvmvif->seqno_valid = false;
 751
 752         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 753                                  sizeof(query_cmd), &query_cmd))
 754                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 755 }
 756
 757 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 758 {
 759         iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
 760
 761         iwl_trans_stop_device(mvm->trans);
 762
 763         /*
 764          * Set the HW restart bit -- this is mostly true as we're
 765          * going to load new firmware and reprogram that, though
 766          * the reprogramming is going to be manual to avoid adding
 767          * all the MACs that aren't support.
 768          * We don't have to clear up everything though because the
 769          * reprogramming is manual. When we resume, we'll actually
 770          * go through a proper restart sequence again to switch
 771          * back to the runtime firmware image.
 772          */
 773         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 774
 775         /* We reprogram keys and shouldn't allocate new key indices */
 776         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 777
 778         mvm->ptk_ivlen = 0;
 779         mvm->ptk_icvlen = 0;
 780         mvm->ptk_ivlen = 0;
 781         mvm->ptk_icvlen = 0;
 782
 783         return iwl_mvm_load_d3_fw(mvm);
 784 }
 785
 786 static int
 787 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 788                           struct cfg80211_wowlan *wowlan,
 789                           struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 790                           struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 791                           struct ieee80211_sta *ap_sta)
 792 {
 793         int ret;
 794         struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 795
 796         /* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */
 797
 798         wowlan_config_cmd->is_11n_connection =
 799                                         ap_sta->ht_cap.ht_supported;
 800
 801         /* Query the last used seqno and set it */
 802         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 803         if (ret < 0)
 804                 return ret;
 805
 806         wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret);
 807
 808         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd);
 809
 810         if (wowlan->disconnect)
 811                 wowlan_config_cmd->wakeup_filter |=
 812                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 813                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 814         if (wowlan->magic_pkt)
 815                 wowlan_config_cmd->wakeup_filter |=
 816                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 817         if (wowlan->gtk_rekey_failure)
 818                 wowlan_config_cmd->wakeup_filter |=
 819                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 820         if (wowlan->eap_identity_req)
 821                 wowlan_config_cmd->wakeup_filter |=
 822                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 823         if (wowlan->four_way_handshake)
 824                 wowlan_config_cmd->wakeup_filter |=
 825                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 826         if (wowlan->n_patterns)
 827                 wowlan_config_cmd->wakeup_filter |=
 828                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 829
 830         if (wowlan->rfkill_release)
 831                 wowlan_config_cmd->wakeup_filter |=
 832                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 833
 834         if (wowlan->tcp) {
 835                 /*
 836                  * Set the "link change" (really "link lost") flag as well
 837                  * since that implies losing the TCP connection.
 838                  */
 839                 wowlan_config_cmd->wakeup_filter |=
 840                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 841                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 842                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 843                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 844         }
 845
 846         return 0;
 847 }
 848
 849 static int
 850 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
 851                       struct cfg80211_wowlan *wowlan,
 852                       struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 853                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 854                       struct ieee80211_sta *ap_sta)
 855 {
 856         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 857         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 858         struct wowlan_key_data key_data = {
 859                 .use_rsc_tsc = false,
 860                 .tkip = &tkip_cmd,
 861                 .use_tkip = false,
 862         };
 863         int ret;
 864
 865         ret = iwl_mvm_switch_to_d3(mvm);
 866         if (ret)
 867                 return ret;
 868
 869         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 870         if (ret)
 871                 return ret;
 872
 873         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 874         if (!key_data.rsc_tsc)
 875                 return -ENOMEM;
 876
 877         if (!iwlwifi_mod_params.sw_crypto) {
 878                 /*
 879                  * This needs to be unlocked due to lock ordering
 880                  * constraints. Since we're in the suspend path
 881                  * that isn't really a problem though.
 882                  */
 883                 mutex_unlock(&mvm->mutex);
 884                 ieee80211_iter_keys(mvm->hw, vif,
 885                                     iwl_mvm_wowlan_program_keys,
 886                                     &key_data);
 887                 mutex_lock(&mvm->mutex);
 888                 if (key_data.error) {
 889                         ret = -EIO;
 890                         goto out;
 891                 }
 892
 893                 if (key_data.use_rsc_tsc) {
 894                         struct iwl_host_cmd rsc_tsc_cmd = {
 895                                 .id = WOWLAN_TSC_RSC_PARAM,
 896                                 .data[0] = key_data.rsc_tsc,
 897                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 898                                 .len[0] = sizeof(*key_data.rsc_tsc),
 899                         };
 900
 901                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 902                         if (ret)
 903                                 goto out;
 904                 }
 905
 906                 if (key_data.use_tkip) {
 907                         ret = iwl_mvm_send_cmd_pdu(mvm,
 908                                                    WOWLAN_TKIP_PARAM,
 909                                                    0, sizeof(tkip_cmd),
 910                                                    &tkip_cmd);
 911                         if (ret)
 912                                 goto out;
 913                 }
 914
 915                 if (mvmvif->rekey_data.valid) {
 916                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 917                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 918                                NL80211_KCK_LEN);
 919                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 920                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 921                                NL80211_KEK_LEN);
 922                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 923                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 924
 925                         ret = iwl_mvm_send_cmd_pdu(mvm,
 926                                                    WOWLAN_KEK_KCK_MATERIAL, 0,
 927                                                    sizeof(kek_kck_cmd),
 928                                                    &kek_kck_cmd);
 929                         if (ret)
 930                                 goto out;
 931                 }
 932         }
 933
 934         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 935                                    sizeof(*wowlan_config_cmd),
 936                                    wowlan_config_cmd);
 937         if (ret)
 938                 goto out;
 939
 940         ret = iwl_mvm_send_patterns(mvm, wowlan);
 941         if (ret)
 942                 goto out;
 943
 944         ret = iwl_mvm_send_proto_offload(mvm, vif, false, 0);
 945         if (ret)
 946                 goto out;
 947
 948         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
 949
 950 out:
 951         kfree(key_data.rsc_tsc);
 952         return ret;
 953 }
 954
 955 static int
 956 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
 957                          struct cfg80211_wowlan *wowlan,
 958                          struct cfg80211_sched_scan_request *nd_config,
 959                          struct ieee80211_vif *vif)
 960 {
 961         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 962         int ret;
 963
 964         ret = iwl_mvm_switch_to_d3(mvm);
 965         if (ret)
 966                 return ret;
 967
 968         /* rfkill release can be either for wowlan or netdetect */
 969         if (wowlan->rfkill_release)
 970                 wowlan_config_cmd.wakeup_filter |=
 971                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 972
 973         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 974                                    sizeof(wowlan_config_cmd),
 975                                    &wowlan_config_cmd);
 976         if (ret)
 977                 return ret;
 978
 979         ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
 980                                        IWL_MVM_SCAN_NETDETECT);
 981         if (ret)
 982                 return ret;
 983
 984         if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
 985                 return -EBUSY;
 986
 987         /* save the sched scan matchsets... */
 988         if (nd_config->n_match_sets) {
 989                 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
 990                                              sizeof(*nd_config->match_sets) *
 991                                              nd_config->n_match_sets,
 992                                              GFP_KERNEL);
 993                 if (mvm->nd_match_sets)
 994                         mvm->n_nd_match_sets = nd_config->n_match_sets;
 995         }
 996
 997         /* ...and the sched scan channels for later reporting */
 998         mvm->nd_channels = kmemdup(nd_config->channels,
 999                                    sizeof(*nd_config->channels) *
1000                                    nd_config->n_channels,
1001                                    GFP_KERNEL);
1002         if (mvm->nd_channels)
1003                 mvm->n_nd_channels = nd_config->n_channels;
1004
1005         return 0;
1006 }
1007
1008 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
1009 {
1010         kfree(mvm->nd_match_sets);
1011         mvm->nd_match_sets = NULL;
1012         mvm->n_nd_match_sets = 0;
1013         kfree(mvm->nd_channels);
1014         mvm->nd_channels = NULL;
1015         mvm->n_nd_channels = 0;
1016 }
1017
1018 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
1019                              struct cfg80211_wowlan *wowlan,
1020                              bool test)
1021 {
1022         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1023         struct ieee80211_vif *vif = NULL;
1024         struct iwl_mvm_vif *mvmvif = NULL;
1025         struct ieee80211_sta *ap_sta = NULL;
1026         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1027                 /*
1028                  * Program the minimum sleep time to 10 seconds, as many
1029                  * platforms have issues processing a wakeup signal while
1030                  * still being in the process of suspending.
1031                  */
1032                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1033         };
1034         struct iwl_host_cmd d3_cfg_cmd = {
1035                 .id = D3_CONFIG_CMD,
1036                 .flags = CMD_WANT_SKB,
1037                 .data[0] = &d3_cfg_cmd_data,
1038                 .len[0] = sizeof(d3_cfg_cmd_data),
1039         };
1040         int ret;
1041         int len __maybe_unused;
1042
1043         if (!wowlan) {
1044                 /*
1045                  * mac80211 shouldn't get here, but for D3 test
1046                  * it doesn't warrant a warning
1047                  */
1048                 WARN_ON(!test);
1049                 return -EINVAL;
1050         }
1051
1052         mutex_lock(&mvm->mutex);
1053
1054         vif = iwl_mvm_get_bss_vif(mvm);
1055         if (IS_ERR_OR_NULL(vif)) {
1056                 ret = 1;
1057                 goto out_noreset;
1058         }
1059
1060         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1061
1062         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) {
1063                 /* if we're not associated, this must be netdetect */
1064                 if (!wowlan->nd_config && !mvm->nd_config) {
1065                         ret = 1;
1066                         goto out_noreset;
1067                 }
1068
1069                 ret = iwl_mvm_netdetect_config(
1070                         mvm, wowlan, wowlan->nd_config ?: mvm->nd_config, vif);
1071                 if (ret)
1072                         goto out;
1073
1074                 mvm->net_detect = true;
1075         } else {
1076                 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1077
1078                 ap_sta = rcu_dereference_protected(
1079                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1080                         lockdep_is_held(&mvm->mutex));
1081                 if (IS_ERR_OR_NULL(ap_sta)) {
1082                         ret = -EINVAL;
1083                         goto out_noreset;
1084                 }
1085
1086                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1087                                                 vif, mvmvif, ap_sta);
1088                 if (ret)
1089                         goto out_noreset;
1090                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1091                                             vif, mvmvif, ap_sta);
1092                 if (ret)
1093                         goto out;
1094
1095                 mvm->net_detect = false;
1096         }
1097
1098         ret = iwl_mvm_power_update_device(mvm);
1099         if (ret)
1100                 goto out;
1101
1102         ret = iwl_mvm_power_update_mac(mvm);
1103         if (ret)
1104                 goto out;
1105
1106 #ifdef CONFIG_IWLWIFI_DEBUGFS
1107         if (mvm->d3_wake_sysassert)
1108                 d3_cfg_cmd_data.wakeup_flags |=
1109                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1110 #endif
1111
1112         /* must be last -- this switches firmware state */
1113         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1114         if (ret)
1115                 goto out;
1116 #ifdef CONFIG_IWLWIFI_DEBUGFS
1117         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1118         if (len >= sizeof(u32)) {
1119                 mvm->d3_test_pme_ptr =
1120                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1121         }
1122 #endif
1123         iwl_free_resp(&d3_cfg_cmd);
1124
1125         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1126
1127         iwl_trans_d3_suspend(mvm->trans, test);
1128  out:
1129         if (ret < 0) {
1130                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1131                 ieee80211_restart_hw(mvm->hw);
1132                 iwl_mvm_free_nd(mvm);
1133         }
1134  out_noreset:
1135         mutex_unlock(&mvm->mutex);
1136
1137         return ret;
1138 }
1139
1140 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1141 {
1142         struct iwl_notification_wait wait_d3;
1143         static const u16 d3_notif[] = { D3_CONFIG_CMD };
1144         int ret;
1145
1146         iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1147                                    d3_notif, ARRAY_SIZE(d3_notif),
1148                                    NULL, NULL);
1149
1150         ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1151         if (ret)
1152                 goto remove_notif;
1153
1154         ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1155         WARN_ON_ONCE(ret);
1156         return ret;
1157
1158 remove_notif:
1159         iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1160         return ret;
1161 }
1162
1163 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1164 {
1165         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1166         int ret;
1167
1168         /* make sure the d0i3 exit work is not pending */
1169         flush_work(&mvm->d0i3_exit_work);
1170
1171         ret = iwl_trans_suspend(mvm->trans);
1172         if (ret)
1173                 return ret;
1174
1175         mvm->trans->wowlan_d0i3 = wowlan->any;
1176         if (mvm->trans->wowlan_d0i3) {
1177                 /* 'any' trigger means d0i3 usage */
1178                 if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) {
1179                         ret = iwl_mvm_enter_d0i3_sync(mvm);
1180
1181                         if (ret)
1182                                 return ret;
1183                 }
1184
1185                 mutex_lock(&mvm->d0i3_suspend_mutex);
1186                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1187                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1188
1189                 iwl_trans_d3_suspend(mvm->trans, false);
1190
1191                 return 0;
1192         }
1193
1194         return __iwl_mvm_suspend(hw, wowlan, false);
1195 }
1196
1197 /* converted data from the different status responses */
1198 struct iwl_wowlan_status_data {
1199         u16 pattern_number;
1200         u16 qos_seq_ctr[8];
1201         u32 wakeup_reasons;
1202         u32 wake_packet_length;
1203         u32 wake_packet_bufsize;
1204         const u8 *wake_packet;
1205 };
1206
1207 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1208                                           struct ieee80211_vif *vif,
1209                                           struct iwl_wowlan_status_data *status)
1210 {
1211         struct sk_buff *pkt = NULL;
1212         struct cfg80211_wowlan_wakeup wakeup = {
1213                 .pattern_idx = -1,
1214         };
1215         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1216         u32 reasons = status->wakeup_reasons;
1217
1218         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1219                 wakeup_report = NULL;
1220                 goto report;
1221         }
1222
1223         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1224                 wakeup.magic_pkt = true;
1225
1226         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1227                 wakeup.pattern_idx =
1228                         status->pattern_number;
1229
1230         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1231                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1232                 wakeup.disconnect = true;
1233
1234         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1235                 wakeup.gtk_rekey_failure = true;
1236
1237         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1238                 wakeup.rfkill_release = true;
1239
1240         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1241                 wakeup.eap_identity_req = true;
1242
1243         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1244                 wakeup.four_way_handshake = true;
1245
1246         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1247                 wakeup.tcp_connlost = true;
1248
1249         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1250                 wakeup.tcp_nomoretokens = true;
1251
1252         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1253                 wakeup.tcp_match = true;
1254
1255         if (status->wake_packet_bufsize) {
1256                 int pktsize = status->wake_packet_bufsize;
1257                 int pktlen = status->wake_packet_length;
1258                 const u8 *pktdata = status->wake_packet;
1259                 struct ieee80211_hdr *hdr = (void *)pktdata;
1260                 int truncated = pktlen - pktsize;
1261
1262                 /* this would be a firmware bug */
1263                 if (WARN_ON_ONCE(truncated < 0))
1264                         truncated = 0;
1265
1266                 if (ieee80211_is_data(hdr->frame_control)) {
1267                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1268                         int ivlen = 0, icvlen = 4; /* also FCS */
1269
1270                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1271                         if (!pkt)
1272                                 goto report;
1273
1274                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1275                         pktdata += hdrlen;
1276                         pktsize -= hdrlen;
1277
1278                         if (ieee80211_has_protected(hdr->frame_control)) {
1279                                 /*
1280                                  * This is unlocked and using gtk_i(c)vlen,
1281                                  * but since everything is under RTNL still
1282                                  * that's not really a problem - changing
1283                                  * it would be difficult.
1284                                  */
1285                                 if (is_multicast_ether_addr(hdr->addr1)) {
1286                                         ivlen = mvm->gtk_ivlen;
1287                                         icvlen += mvm->gtk_icvlen;
1288                                 } else {
1289                                         ivlen = mvm->ptk_ivlen;
1290                                         icvlen += mvm->ptk_icvlen;
1291                                 }
1292                         }
1293
1294                         /* if truncated, FCS/ICV is (partially) gone */
1295                         if (truncated >= icvlen) {
1296                                 icvlen = 0;
1297                                 truncated -= icvlen;
1298                         } else {
1299                                 icvlen -= truncated;
1300                                 truncated = 0;
1301                         }
1302
1303                         pktsize -= ivlen + icvlen;
1304                         pktdata += ivlen;
1305
1306                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1307
1308                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1309                                 goto report;
1310                         wakeup.packet = pkt->data;
1311                         wakeup.packet_present_len = pkt->len;
1312                         wakeup.packet_len = pkt->len - truncated;
1313                         wakeup.packet_80211 = false;
1314                 } else {
1315                         int fcslen = 4;
1316
1317                         if (truncated >= 4) {
1318                                 truncated -= 4;
1319                                 fcslen = 0;
1320                         } else {
1321                                 fcslen -= truncated;
1322                                 truncated = 0;
1323                         }
1324                         pktsize -= fcslen;
1325                         wakeup.packet = status->wake_packet;
1326                         wakeup.packet_present_len = pktsize;
1327                         wakeup.packet_len = pktlen - truncated;
1328                         wakeup.packet_80211 = true;
1329                 }
1330         }
1331
1332  report:
1333         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1334         kfree_skb(pkt);
1335 }
1336
1337 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1338                                   struct ieee80211_key_seq *seq)
1339 {
1340         u64 pn;
1341
1342         pn = le64_to_cpu(sc->pn);
1343         seq->ccmp.pn[0] = pn >> 40;
1344         seq->ccmp.pn[1] = pn >> 32;
1345         seq->ccmp.pn[2] = pn >> 24;
1346         seq->ccmp.pn[3] = pn >> 16;
1347         seq->ccmp.pn[4] = pn >> 8;
1348         seq->ccmp.pn[5] = pn;
1349 }
1350
1351 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1352                                    struct ieee80211_key_seq *seq)
1353 {
1354         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1355         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1356 }
1357
1358 static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs,
1359                                    struct ieee80211_key_conf *key)
1360 {
1361         int tid;
1362
1363         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1364
1365         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1366                 struct ieee80211_key_seq seq = {};
1367
1368                 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1369                 ieee80211_set_key_rx_seq(key, tid, &seq);
1370         }
1371 }
1372
1373 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1374                                     struct ieee80211_key_conf *key)
1375 {
1376         int tid;
1377
1378         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1379
1380         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1381                 struct ieee80211_key_seq seq = {};
1382
1383                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1384                 ieee80211_set_key_rx_seq(key, tid, &seq);
1385         }
1386 }
1387
1388 static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key,
1389                                    struct iwl_wowlan_status *status)
1390 {
1391         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1392
1393         switch (key->cipher) {
1394         case WLAN_CIPHER_SUITE_CCMP:
1395                 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key);
1396                 break;
1397         case WLAN_CIPHER_SUITE_TKIP:
1398                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1399                 break;
1400         default:
1401                 WARN_ON(1);
1402         }
1403 }
1404
1405 struct iwl_mvm_d3_gtk_iter_data {
1406         struct iwl_wowlan_status *status;
1407         void *last_gtk;
1408         u32 cipher;
1409         bool find_phase, unhandled_cipher;
1410         int num_keys;
1411 };
1412
1413 static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw,
1414                                    struct ieee80211_vif *vif,
1415                                    struct ieee80211_sta *sta,
1416                                    struct ieee80211_key_conf *key,
1417                                    void *_data)
1418 {
1419         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1420
1421         if (data->unhandled_cipher)
1422                 return;
1423
1424         switch (key->cipher) {
1425         case WLAN_CIPHER_SUITE_WEP40:
1426         case WLAN_CIPHER_SUITE_WEP104:
1427                 /* ignore WEP completely, nothing to do */
1428                 return;
1429         case WLAN_CIPHER_SUITE_CCMP:
1430         case WLAN_CIPHER_SUITE_TKIP:
1431                 /* we support these */
1432                 break;
1433         default:
1434                 /* everything else (even CMAC for MFP) - disconnect from AP */
1435                 data->unhandled_cipher = true;
1436                 return;
1437         }
1438
1439         data->num_keys++;
1440
1441         /*
1442          * pairwise key - update sequence counters only;
1443          * note that this assumes no TDLS sessions are active
1444          */
1445         if (sta) {
1446                 struct ieee80211_key_seq seq = {};
1447                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1448
1449                 if (data->find_phase)
1450                         return;
1451
1452                 switch (key->cipher) {
1453                 case WLAN_CIPHER_SUITE_CCMP:
1454                         iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key);
1455                         atomic64_set(&key->tx_pn, le64_to_cpu(sc->aes.tsc.pn));
1456                         break;
1457                 case WLAN_CIPHER_SUITE_TKIP:
1458                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1459                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1460                         ieee80211_set_key_tx_seq(key, &seq);
1461                         break;
1462                 }
1463
1464                 /* that's it for this key */
1465                 return;
1466         }
1467
1468         if (data->find_phase) {
1469                 data->last_gtk = key;
1470                 data->cipher = key->cipher;
1471                 return;
1472         }
1473
1474         if (data->status->num_of_gtk_rekeys)
1475                 ieee80211_remove_key(key);
1476         else if (data->last_gtk == key)
1477                 iwl_mvm_set_key_rx_seq(key, data->status);
1478 }
1479
1480 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1481                                           struct ieee80211_vif *vif,
1482                                           struct iwl_wowlan_status *status)
1483 {
1484         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1485         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1486                 .status = status,
1487         };
1488         u32 disconnection_reasons =
1489                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1490                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1491
1492         if (!status || !vif->bss_conf.bssid)
1493                 return false;
1494
1495         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1496                 return false;
1497
1498         /* find last GTK that we used initially, if any */
1499         gtkdata.find_phase = true;
1500         ieee80211_iter_keys(mvm->hw, vif,
1501                             iwl_mvm_d3_update_gtks, &gtkdata);
1502         /* not trying to keep connections with MFP/unhandled ciphers */
1503         if (gtkdata.unhandled_cipher)
1504                 return false;
1505         if (!gtkdata.num_keys)
1506                 goto out;
1507         if (!gtkdata.last_gtk)
1508                 return false;
1509
1510         /*
1511          * invalidate all other GTKs that might still exist and update
1512          * the one that we used
1513          */
1514         gtkdata.find_phase = false;
1515         ieee80211_iter_keys(mvm->hw, vif,
1516                             iwl_mvm_d3_update_gtks, &gtkdata);
1517
1518         if (status->num_of_gtk_rekeys) {
1519                 struct ieee80211_key_conf *key;
1520                 struct {
1521                         struct ieee80211_key_conf conf;
1522                         u8 key[32];
1523                 } conf = {
1524                         .conf.cipher = gtkdata.cipher,
1525                         .conf.keyidx = status->gtk.key_index,
1526                 };
1527
1528                 switch (gtkdata.cipher) {
1529                 case WLAN_CIPHER_SUITE_CCMP:
1530                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1531                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1532                                WLAN_KEY_LEN_CCMP);
1533                         break;
1534                 case WLAN_CIPHER_SUITE_TKIP:
1535                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1536                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1537                         /* leave TX MIC key zeroed, we don't use it anyway */
1538                         memcpy(conf.conf.key +
1539                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1540                                status->gtk.tkip_mic_key, 8);
1541                         break;
1542                 }
1543
1544                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1545                 if (IS_ERR(key))
1546                         return false;
1547                 iwl_mvm_set_key_rx_seq(key, status);
1548         }
1549
1550         if (status->num_of_gtk_rekeys) {
1551                 __be64 replay_ctr =
1552                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1553                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1554                                            (void *)&replay_ctr, GFP_KERNEL);
1555         }
1556
1557 out:
1558         mvmvif->seqno_valid = true;
1559         /* +0x10 because the set API expects next-to-use, not last-used */
1560         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1561
1562         return true;
1563 }
1564
1565 static struct iwl_wowlan_status *
1566 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1567 {
1568         u32 base = mvm->error_event_table;
1569         struct error_table_start {
1570                 /* cf. struct iwl_error_event_table */
1571                 u32 valid;
1572                 u32 error_id;
1573         } err_info;
1574         struct iwl_host_cmd cmd = {
1575                 .id = WOWLAN_GET_STATUSES,
1576                 .flags = CMD_WANT_SKB,
1577         };
1578         struct iwl_wowlan_status *status, *fw_status;
1579         int ret, len, status_size;
1580
1581         iwl_trans_read_mem_bytes(mvm->trans, base,
1582                                  &err_info, sizeof(err_info));
1583
1584         if (err_info.valid) {
1585                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1586                          err_info.valid, err_info.error_id);
1587                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1588                         struct cfg80211_wowlan_wakeup wakeup = {
1589                                 .rfkill_release = true,
1590                         };
1591                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1592                                                        GFP_KERNEL);
1593                 }
1594                 return ERR_PTR(-EIO);
1595         }
1596
1597         /* only for tracing for now */
1598         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1599         if (ret)
1600                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1601
1602         ret = iwl_mvm_send_cmd(mvm, &cmd);
1603         if (ret) {
1604                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1605                 return ERR_PTR(ret);
1606         }
1607
1608         /* RF-kill already asserted again... */
1609         if (!cmd.resp_pkt) {
1610                 fw_status = ERR_PTR(-ERFKILL);
1611                 goto out_free_resp;
1612         }
1613
1614         status_size = sizeof(*fw_status);
1615
1616         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1617         if (len < status_size) {
1618                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1619                 fw_status = ERR_PTR(-EIO);
1620                 goto out_free_resp;
1621         }
1622
1623         status = (void *)cmd.resp_pkt->data;
1624         if (len != (status_size +
1625                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1626                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1627                 fw_status = ERR_PTR(-EIO);
1628                 goto out_free_resp;
1629         }
1630
1631         fw_status = kmemdup(status, len, GFP_KERNEL);
1632
1633 out_free_resp:
1634         iwl_free_resp(&cmd);
1635         return fw_status;
1636 }
1637
1638 /* releases the MVM mutex */
1639 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1640                                          struct ieee80211_vif *vif)
1641 {
1642         struct iwl_wowlan_status_data status;
1643         struct iwl_wowlan_status *fw_status;
1644         int i;
1645         bool keep;
1646         struct ieee80211_sta *ap_sta;
1647         struct iwl_mvm_sta *mvm_ap_sta;
1648
1649         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1650         if (IS_ERR_OR_NULL(fw_status))
1651                 goto out_unlock;
1652
1653         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1654         for (i = 0; i < 8; i++)
1655                 status.qos_seq_ctr[i] =
1656                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1657         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1658         status.wake_packet_length =
1659                 le32_to_cpu(fw_status->wake_packet_length);
1660         status.wake_packet_bufsize =
1661                 le32_to_cpu(fw_status->wake_packet_bufsize);
1662         status.wake_packet = fw_status->wake_packet;
1663
1664         /* still at hard-coded place 0 for D3 image */
1665         ap_sta = rcu_dereference_protected(
1666                         mvm->fw_id_to_mac_id[0],
1667                         lockdep_is_held(&mvm->mutex));
1668         if (IS_ERR_OR_NULL(ap_sta))
1669                 goto out_free;
1670
1671         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1672         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1673                 u16 seq = status.qos_seq_ctr[i];
1674                 /* firmware stores last-used value, we store next value */
1675                 seq += 0x10;
1676                 mvm_ap_sta->tid_data[i].seq_number = seq;
1677         }
1678
1679         /* now we have all the data we need, unlock to avoid mac80211 issues */
1680         mutex_unlock(&mvm->mutex);
1681
1682         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1683
1684         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1685
1686         kfree(fw_status);
1687         return keep;
1688
1689 out_free:
1690         kfree(fw_status);
1691 out_unlock:
1692         mutex_unlock(&mvm->mutex);
1693         return false;
1694 }
1695
1696 struct iwl_mvm_nd_query_results {
1697         u32 matched_profiles;
1698         struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1699 };
1700
1701 static int
1702 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1703                                 struct iwl_mvm_nd_query_results *results)
1704 {
1705         struct iwl_scan_offload_profiles_query *query;
1706         struct iwl_host_cmd cmd = {
1707                 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1708                 .flags = CMD_WANT_SKB,
1709         };
1710         int ret, len;
1711
1712         ret = iwl_mvm_send_cmd(mvm, &cmd);
1713         if (ret) {
1714                 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1715                 return ret;
1716         }
1717
1718         /* RF-kill already asserted again... */
1719         if (!cmd.resp_pkt) {
1720                 ret = -ERFKILL;
1721                 goto out_free_resp;
1722         }
1723
1724         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1725         if (len < sizeof(*query)) {
1726                 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1727                 ret = -EIO;
1728                 goto out_free_resp;
1729         }
1730
1731         query = (void *)cmd.resp_pkt->data;
1732
1733         results->matched_profiles = le32_to_cpu(query->matched_profiles);
1734         memcpy(results->matches, query->matches, sizeof(results->matches));
1735
1736 #ifdef CONFIG_IWLWIFI_DEBUGFS
1737         mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1738 #endif
1739
1740 out_free_resp:
1741         iwl_free_resp(&cmd);
1742         return ret;
1743 }
1744
1745 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1746                                             struct ieee80211_vif *vif)
1747 {
1748         struct cfg80211_wowlan_nd_info *net_detect = NULL;
1749         struct cfg80211_wowlan_wakeup wakeup = {
1750                 .pattern_idx = -1,
1751         };
1752         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1753         struct iwl_mvm_nd_query_results query;
1754         struct iwl_wowlan_status *fw_status;
1755         unsigned long matched_profiles;
1756         u32 reasons = 0;
1757         int i, j, n_matches, ret;
1758
1759         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1760         if (!IS_ERR_OR_NULL(fw_status)) {
1761                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1762                 kfree(fw_status);
1763         }
1764
1765         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1766                 wakeup.rfkill_release = true;
1767
1768         if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1769                 goto out;
1770
1771         ret = iwl_mvm_netdetect_query_results(mvm, &query);
1772         if (ret || !query.matched_profiles) {
1773                 wakeup_report = NULL;
1774                 goto out;
1775         }
1776
1777         matched_profiles = query.matched_profiles;
1778         if (mvm->n_nd_match_sets) {
1779                 n_matches = hweight_long(matched_profiles);
1780         } else {
1781                 IWL_ERR(mvm, "no net detect match information available\n");
1782                 n_matches = 0;
1783         }
1784
1785         net_detect = kzalloc(sizeof(*net_detect) +
1786                              (n_matches * sizeof(net_detect->matches[0])),
1787                              GFP_KERNEL);
1788         if (!net_detect || !n_matches)
1789                 goto out_report_nd;
1790
1791         for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1792                 struct iwl_scan_offload_profile_match *fw_match;
1793                 struct cfg80211_wowlan_nd_match *match;
1794                 int idx, n_channels = 0;
1795
1796                 fw_match = &query.matches[i];
1797
1798                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1799                         n_channels += hweight8(fw_match->matching_channels[j]);
1800
1801                 match = kzalloc(sizeof(*match) +
1802                                 (n_channels * sizeof(*match->channels)),
1803                                 GFP_KERNEL);
1804                 if (!match)
1805                         goto out_report_nd;
1806
1807                 net_detect->matches[net_detect->n_matches++] = match;
1808
1809                 /* We inverted the order of the SSIDs in the scan
1810                  * request, so invert the index here.
1811                  */
1812                 idx = mvm->n_nd_match_sets - i - 1;
1813                 match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
1814                 memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
1815                        match->ssid.ssid_len);
1816
1817                 if (mvm->n_nd_channels < n_channels)
1818                         continue;
1819
1820                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
1821                         if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
1822                                 match->channels[match->n_channels++] =
1823                                         mvm->nd_channels[j]->center_freq;
1824         }
1825
1826 out_report_nd:
1827         wakeup.net_detect = net_detect;
1828 out:
1829         iwl_mvm_free_nd(mvm);
1830
1831         mutex_unlock(&mvm->mutex);
1832         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1833
1834         if (net_detect) {
1835                 for (i = 0; i < net_detect->n_matches; i++)
1836                         kfree(net_detect->matches[i]);
1837                 kfree(net_detect);
1838         }
1839 }
1840
1841 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1842 {
1843 #ifdef CONFIG_IWLWIFI_DEBUGFS
1844         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1845         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1846         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1847
1848         if (!mvm->store_d3_resume_sram)
1849                 return;
1850
1851         if (!mvm->d3_resume_sram) {
1852                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1853                 if (!mvm->d3_resume_sram)
1854                         return;
1855         }
1856
1857         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1858 #endif
1859 }
1860
1861 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1862                                        struct ieee80211_vif *vif)
1863 {
1864         /* skip the one we keep connection on */
1865         if (data == vif)
1866                 return;
1867
1868         if (vif->type == NL80211_IFTYPE_STATION)
1869                 ieee80211_resume_disconnect(vif);
1870 }
1871
1872 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1873 {
1874         struct ieee80211_vif *vif = NULL;
1875         int ret;
1876         enum iwl_d3_status d3_status;
1877         bool keep = false;
1878
1879         mutex_lock(&mvm->mutex);
1880
1881         /* get the BSS vif pointer again */
1882         vif = iwl_mvm_get_bss_vif(mvm);
1883         if (IS_ERR_OR_NULL(vif))
1884                 goto err;
1885
1886         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1887         if (ret)
1888                 goto err;
1889
1890         if (d3_status != IWL_D3_STATUS_ALIVE) {
1891                 IWL_INFO(mvm, "Device was reset during suspend\n");
1892                 goto err;
1893         }
1894
1895         /* query SRAM first in case we want event logging */
1896         iwl_mvm_read_d3_sram(mvm);
1897
1898         /*
1899          * Query the current location and source from the D3 firmware so we
1900          * can play it back when we re-intiailize the D0 firmware
1901          */
1902         iwl_mvm_update_changed_regdom(mvm);
1903
1904         if (mvm->net_detect) {
1905                 iwl_mvm_query_netdetect_reasons(mvm, vif);
1906                 /* has unlocked the mutex, so skip that */
1907                 goto out;
1908         } else {
1909                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1910 #ifdef CONFIG_IWLWIFI_DEBUGFS
1911                 if (keep)
1912                         mvm->keep_vif = vif;
1913 #endif
1914                 /* has unlocked the mutex, so skip that */
1915                 goto out_iterate;
1916         }
1917
1918 err:
1919         iwl_mvm_free_nd(mvm);
1920         mutex_unlock(&mvm->mutex);
1921
1922 out_iterate:
1923         if (!test)
1924                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1925                         IEEE80211_IFACE_ITER_NORMAL,
1926                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1927
1928 out:
1929         /* return 1 to reconfigure the device */
1930         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1931         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
1932
1933         /* We always return 1, which causes mac80211 to do a reconfig
1934          * with IEEE80211_RECONFIG_TYPE_RESTART.  This type of
1935          * reconfig calls iwl_mvm_restart_complete(), where we unref
1936          * the IWL_MVM_REF_UCODE_DOWN, so we need to take the
1937          * reference here.
1938          */
1939         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1940         return 1;
1941 }
1942
1943 static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
1944 {
1945         iwl_trans_resume(mvm->trans);
1946
1947         return __iwl_mvm_resume(mvm, false);
1948 }
1949
1950 static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
1951 {
1952         bool exit_now;
1953         enum iwl_d3_status d3_status;
1954
1955         iwl_trans_d3_resume(mvm->trans, &d3_status, false);
1956
1957         /*
1958          * make sure to clear D0I3_DEFER_WAKEUP before
1959          * calling iwl_trans_resume(), which might wait
1960          * for d0i3 exit completion.
1961          */
1962         mutex_lock(&mvm->d0i3_suspend_mutex);
1963         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1964         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1965                                         &mvm->d0i3_suspend_flags);
1966         mutex_unlock(&mvm->d0i3_suspend_mutex);
1967         if (exit_now) {
1968                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1969                 _iwl_mvm_exit_d0i3(mvm);
1970         }
1971
1972         iwl_trans_resume(mvm->trans);
1973
1974         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) {
1975                 int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
1976
1977                 if (ret)
1978                         return ret;
1979                 /*
1980                  * d0i3 exit will be deferred until reconfig_complete.
1981                  * make sure there we are out of d0i3.
1982                  */
1983         }
1984         return 0;
1985 }
1986
1987 int iwl_mvm_resume(struct ieee80211_hw *hw)
1988 {
1989         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1990
1991         /* 'any' trigger means d0i3 was used */
1992         if (hw->wiphy->wowlan_config->any)
1993                 return iwl_mvm_resume_d0i3(mvm);
1994         else
1995                 return iwl_mvm_resume_d3(mvm);
1996 }
1997
1998 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1999 {
2000         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2001
2002         device_set_wakeup_enable(mvm->trans->dev, enabled);
2003 }
2004
2005 #ifdef CONFIG_IWLWIFI_DEBUGFS
2006 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2007 {
2008         struct iwl_mvm *mvm = inode->i_private;
2009         int err;
2010
2011         if (mvm->d3_test_active)
2012                 return -EBUSY;
2013
2014         file->private_data = inode->i_private;
2015
2016         ieee80211_stop_queues(mvm->hw);
2017         synchronize_net();
2018
2019         /* start pseudo D3 */
2020         rtnl_lock();
2021         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2022         rtnl_unlock();
2023         if (err > 0)
2024                 err = -EINVAL;
2025         if (err) {
2026                 ieee80211_wake_queues(mvm->hw);
2027                 return err;
2028         }
2029         mvm->d3_test_active = true;
2030         mvm->keep_vif = NULL;
2031         return 0;
2032 }
2033
2034 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2035                                     size_t count, loff_t *ppos)
2036 {
2037         struct iwl_mvm *mvm = file->private_data;
2038         u32 pme_asserted;
2039
2040         while (true) {
2041                 /* read pme_ptr if available */
2042                 if (mvm->d3_test_pme_ptr) {
2043                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
2044                                                 mvm->d3_test_pme_ptr);
2045                         if (pme_asserted)
2046                                 break;
2047                 }
2048
2049                 if (msleep_interruptible(100))
2050                         break;
2051         }
2052
2053         return 0;
2054 }
2055
2056 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2057                                               struct ieee80211_vif *vif)
2058 {
2059         /* skip the one we keep connection on */
2060         if (_data == vif)
2061                 return;
2062
2063         if (vif->type == NL80211_IFTYPE_STATION)
2064                 ieee80211_connection_loss(vif);
2065 }
2066
2067 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2068 {
2069         struct iwl_mvm *mvm = inode->i_private;
2070         int remaining_time = 10;
2071
2072         mvm->d3_test_active = false;
2073         rtnl_lock();
2074         __iwl_mvm_resume(mvm, true);
2075         rtnl_unlock();
2076         iwl_abort_notification_waits(&mvm->notif_wait);
2077         ieee80211_restart_hw(mvm->hw);
2078
2079         /* wait for restart and disconnect all interfaces */
2080         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2081                remaining_time > 0) {
2082                 remaining_time--;
2083                 msleep(1000);
2084         }
2085
2086         if (remaining_time == 0)
2087                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
2088
2089         ieee80211_iterate_active_interfaces_atomic(
2090                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2091                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2092
2093         ieee80211_wake_queues(mvm->hw);
2094
2095         return 0;
2096 }
2097
2098 const struct file_operations iwl_dbgfs_d3_test_ops = {
2099         .llseek = no_llseek,
2100         .open = iwl_mvm_d3_test_open,
2101         .read = iwl_mvm_d3_test_read,
2102         .release = iwl_mvm_d3_test_release,
2103 };
2104 #endif