drivers/net/wireless/intel/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  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
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  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  38  * All rights reserved.
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  41  * modification, are permitted provided that the following conditions
  42  * are met:
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  45  *    notice, this list of conditions and the following disclaimer.
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  51  *    contributors may be used to endorse or promote products derived
  52  *    from this software without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  58  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  61  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67
  68 #include <linux/etherdevice.h>
  69 #include <linux/ip.h>
  70 #include <linux/fs.h>
  71 #include <net/cfg80211.h>
  72 #include <net/ipv6.h>
  73 #include <net/tcp.h>
  74 #include <net/addrconf.h>
  75 #include "iwl-modparams.h"
  76 #include "fw-api.h"
  77 #include "mvm.h"
  78
  79 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  80                             struct ieee80211_vif *vif,
  81                             struct cfg80211_gtk_rekey_data *data)
  82 {
  83         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  84         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  85
  86         if (iwlwifi_mod_params.swcrypto)
  87                 return;
  88
  89         mutex_lock(&mvm->mutex);
  90
  91         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  92         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  93         mvmvif->rekey_data.replay_ctr =
  94                 cpu_to_le64(be64_to_cpup((__be64 *)data->replay_ctr));
  95         mvmvif->rekey_data.valid = true;
  96
  97         mutex_unlock(&mvm->mutex);
  98 }
  99
 100 #if IS_ENABLED(CONFIG_IPV6)
 101 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
 102                               struct ieee80211_vif *vif,
 103                               struct inet6_dev *idev)
 104 {
 105         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 106         struct inet6_ifaddr *ifa;
 107         int idx = 0;
 108
 109         memset(mvmvif->tentative_addrs, 0, sizeof(mvmvif->tentative_addrs));
 110
 111         read_lock_bh(&idev->lock);
 112         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 113                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 114                 if (ifa->flags & IFA_F_TENTATIVE)
 115                         __set_bit(idx, mvmvif->tentative_addrs);
 116                 idx++;
 117                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
 118                         break;
 119         }
 120         read_unlock_bh(&idev->lock);
 121
 122         mvmvif->num_target_ipv6_addrs = idx;
 123 }
 124 #endif
 125
 126 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 127                                      struct ieee80211_vif *vif, int idx)
 128 {
 129         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 130
 131         mvmvif->tx_key_idx = idx;
 132 }
 133
 134 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 135 {
 136         int i;
 137
 138         for (i = 0; i < IWL_P1K_SIZE; i++)
 139                 out[i] = cpu_to_le16(p1k[i]);
 140 }
 141
 142 static const u8 *iwl_mvm_find_max_pn(struct ieee80211_key_conf *key,
 143                                      struct iwl_mvm_key_pn *ptk_pn,
 144                                      struct ieee80211_key_seq *seq,
 145                                      int tid, int queues)
 146 {
 147         const u8 *ret = seq->ccmp.pn;
 148         int i;
 149
 150         /* get the PN from mac80211, used on the default queue */
 151         ieee80211_get_key_rx_seq(key, tid, seq);
 152
 153         /* and use the internal data for the other queues */
 154         for (i = 1; i < queues; i++) {
 155                 const u8 *tmp = ptk_pn->q[i].pn[tid];
 156
 157                 if (memcmp(ret, tmp, IEEE80211_CCMP_PN_LEN) <= 0)
 158                         ret = tmp;
 159         }
 160
 161         return ret;
 162 }
 163
 164 struct wowlan_key_data {
 165         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 166         struct iwl_wowlan_tkip_params_cmd *tkip;
 167         bool error, use_rsc_tsc, use_tkip, configure_keys;
 168         int wep_key_idx;
 169 };
 170
 171 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 172                                         struct ieee80211_vif *vif,
 173                                         struct ieee80211_sta *sta,
 174                                         struct ieee80211_key_conf *key,
 175                                         void *_data)
 176 {
 177         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 178         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 179         struct wowlan_key_data *data = _data;
 180         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 181         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 182         struct iwl_p1k_cache *rx_p1ks;
 183         u8 *rx_mic_key;
 184         struct ieee80211_key_seq seq;
 185         u32 cur_rx_iv32 = 0;
 186         u16 p1k[IWL_P1K_SIZE];
 187         int ret, i;
 188
 189         switch (key->cipher) {
 190         case WLAN_CIPHER_SUITE_WEP40:
 191         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 192                 struct {
 193                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 194                         struct iwl_mvm_wep_key wep_key;
 195                 } __packed wkc = {
 196                         .wep_key_cmd.mac_id_n_color =
 197                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 198                                                                 mvmvif->color)),
 199                         .wep_key_cmd.num_keys = 1,
 200                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 201                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 202                         .wep_key.key_index = key->keyidx,
 203                         .wep_key.key_size = key->keylen,
 204                 };
 205
 206                 /*
 207                  * This will fail -- the key functions don't set support
 208                  * pairwise WEP keys. However, that's better than silently
 209                  * failing WoWLAN. Or maybe not?
 210                  */
 211                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 212                         break;
 213
 214                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 215                 if (key->keyidx == mvmvif->tx_key_idx) {
 216                         /* TX key must be at offset 0 */
 217                         wkc.wep_key.key_offset = 0;
 218                 } else {
 219                         /* others start at 1 */
 220                         data->wep_key_idx++;
 221                         wkc.wep_key.key_offset = data->wep_key_idx;
 222                 }
 223
 224                 if (data->configure_keys) {
 225                         mutex_lock(&mvm->mutex);
 226                         ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0,
 227                                                    sizeof(wkc), &wkc);
 228                         data->error = ret != 0;
 229
 230                         mvm->ptk_ivlen = key->iv_len;
 231                         mvm->ptk_icvlen = key->icv_len;
 232                         mvm->gtk_ivlen = key->iv_len;
 233                         mvm->gtk_icvlen = key->icv_len;
 234                         mutex_unlock(&mvm->mutex);
 235                 }
 236
 237                 /* don't upload key again */
 238                 return;
 239         }
 240         default:
 241                 data->error = true;
 242                 return;
 243         case WLAN_CIPHER_SUITE_AES_CMAC:
 244                 /*
 245                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 246                  * but we also shouldn't abort suspend due to that. It does have
 247                  * support for the IGTK key renewal, but doesn't really use the
 248                  * IGTK for anything. This means we could spuriously wake up or
 249                  * be deauthenticated, but that was considered acceptable.
 250                  */
 251                 return;
 252         case WLAN_CIPHER_SUITE_TKIP:
 253                 if (sta) {
 254                         u64 pn64;
 255
 256                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 257                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 258
 259                         rx_p1ks = data->tkip->rx_uni;
 260
 261                         pn64 = atomic64_read(&key->tx_pn);
 262                         tkip_tx_sc->iv16 = cpu_to_le16(TKIP_PN_TO_IV16(pn64));
 263                         tkip_tx_sc->iv32 = cpu_to_le32(TKIP_PN_TO_IV32(pn64));
 264
 265                         ieee80211_get_tkip_p1k_iv(key, TKIP_PN_TO_IV32(pn64),
 266                                                   p1k);
 267                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 268
 269                         memcpy(data->tkip->mic_keys.tx,
 270                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 271                                IWL_MIC_KEY_SIZE);
 272
 273                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 274                 } else {
 275                         tkip_sc =
 276                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 277                         rx_p1ks = data->tkip->rx_multi;
 278                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 279                 }
 280
 281                 /*
 282                  * For non-QoS this relies on the fact that both the uCode and
 283                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 284                  * for checking the IV in the frames.
 285                  */
 286                 for (i = 0; i < IWL_NUM_RSC; i++) {
 287                         ieee80211_get_key_rx_seq(key, i, &seq);
 288                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 289                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 290                         /* wrapping isn't allowed, AP must rekey */
 291                         if (seq.tkip.iv32 > cur_rx_iv32)
 292                                 cur_rx_iv32 = seq.tkip.iv32;
 293                 }
 294
 295                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 296                                           cur_rx_iv32, p1k);
 297                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 298                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 299                                           cur_rx_iv32 + 1, p1k);
 300                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 301
 302                 memcpy(rx_mic_key,
 303                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 304                        IWL_MIC_KEY_SIZE);
 305
 306                 data->use_tkip = true;
 307                 data->use_rsc_tsc = true;
 308                 break;
 309         case WLAN_CIPHER_SUITE_CCMP:
 310                 if (sta) {
 311                         u64 pn64;
 312
 313                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 314                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 315
 316                         pn64 = atomic64_read(&key->tx_pn);
 317                         aes_tx_sc->pn = cpu_to_le64(pn64);
 318                 } else {
 319                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 320                 }
 321
 322                 /*
 323                  * For non-QoS this relies on the fact that both the uCode and
 324                  * mac80211/our RX code use TID 0 for checking the PN.
 325                  */
 326                 if (sta && iwl_mvm_has_new_rx_api(mvm)) {
 327                         struct iwl_mvm_sta *mvmsta;
 328                         struct iwl_mvm_key_pn *ptk_pn;
 329                         const u8 *pn;
 330
 331                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 332                         ptk_pn = rcu_dereference_protected(
 333                                                 mvmsta->ptk_pn[key->keyidx],
 334                                                 lockdep_is_held(&mvm->mutex));
 335                         if (WARN_ON(!ptk_pn))
 336                                 break;
 337
 338                         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 339                                 pn = iwl_mvm_find_max_pn(key, ptk_pn, &seq, i,
 340                                                 mvm->trans->num_rx_queues);
 341                                 aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
 342                                                            ((u64)pn[4] << 8) |
 343                                                            ((u64)pn[3] << 16) |
 344                                                            ((u64)pn[2] << 24) |
 345                                                            ((u64)pn[1] << 32) |
 346                                                            ((u64)pn[0] << 40));
 347                         }
 348                 } else {
 349                         for (i = 0; i < IWL_NUM_RSC; i++) {
 350                                 u8 *pn = seq.ccmp.pn;
 351
 352                                 ieee80211_get_key_rx_seq(key, i, &seq);
 353                                 aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
 354                                                            ((u64)pn[4] << 8) |
 355                                                            ((u64)pn[3] << 16) |
 356                                                            ((u64)pn[2] << 24) |
 357                                                            ((u64)pn[1] << 32) |
 358                                                            ((u64)pn[0] << 40));
 359                         }
 360                 }
 361                 data->use_rsc_tsc = true;
 362                 break;
 363         }
 364
 365         if (data->configure_keys) {
 366                 mutex_lock(&mvm->mutex);
 367                 /*
 368                  * The D3 firmware hardcodes the key offset 0 as the key it
 369                  * uses to transmit packets to the AP, i.e. the PTK.
 370                  */
 371                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 372                         mvm->ptk_ivlen = key->iv_len;
 373                         mvm->ptk_icvlen = key->icv_len;
 374                         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 0);
 375                 } else {
 376                         /*
 377                          * firmware only supports TSC/RSC for a single key,
 378                          * so if there are multiple keep overwriting them
 379                          * with new ones -- this relies on mac80211 doing
 380                          * list_add_tail().
 381                          */
 382                         mvm->gtk_ivlen = key->iv_len;
 383                         mvm->gtk_icvlen = key->icv_len;
 384                         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 1);
 385                 }
 386                 mutex_unlock(&mvm->mutex);
 387                 data->error = ret != 0;
 388         }
 389 }
 390
 391 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 392                                  struct cfg80211_wowlan *wowlan)
 393 {
 394         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 395         struct iwl_host_cmd cmd = {
 396                 .id = WOWLAN_PATTERNS,
 397                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 398         };
 399         int i, err;
 400
 401         if (!wowlan->n_patterns)
 402                 return 0;
 403
 404         cmd.len[0] = sizeof(*pattern_cmd) +
 405                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 406
 407         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 408         if (!pattern_cmd)
 409                 return -ENOMEM;
 410
 411         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 412
 413         for (i = 0; i < wowlan->n_patterns; i++) {
 414                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 415
 416                 memcpy(&pattern_cmd->patterns[i].mask,
 417                        wowlan->patterns[i].mask, mask_len);
 418                 memcpy(&pattern_cmd->patterns[i].pattern,
 419                        wowlan->patterns[i].pattern,
 420                        wowlan->patterns[i].pattern_len);
 421                 pattern_cmd->patterns[i].mask_size = mask_len;
 422                 pattern_cmd->patterns[i].pattern_size =
 423                         wowlan->patterns[i].pattern_len;
 424         }
 425
 426         cmd.data[0] = pattern_cmd;
 427         err = iwl_mvm_send_cmd(mvm, &cmd);
 428         kfree(pattern_cmd);
 429         return err;
 430 }
 431
 432 enum iwl_mvm_tcp_packet_type {
 433         MVM_TCP_TX_SYN,
 434         MVM_TCP_RX_SYNACK,
 435         MVM_TCP_TX_DATA,
 436         MVM_TCP_RX_ACK,
 437         MVM_TCP_RX_WAKE,
 438         MVM_TCP_TX_FIN,
 439 };
 440
 441 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 442 {
 443         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 444         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 445 }
 446
 447 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
 448                                      struct cfg80211_wowlan_tcp *tcp,
 449                                      void *_pkt, u8 *mask,
 450                                      __le16 *pseudo_hdr_csum,
 451                                      enum iwl_mvm_tcp_packet_type ptype)
 452 {
 453         struct {
 454                 struct ethhdr eth;
 455                 struct iphdr ip;
 456                 struct tcphdr tcp;
 457                 u8 data[];
 458         } __packed *pkt = _pkt;
 459         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 460         int i;
 461
 462         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 463         pkt->ip.version = 4;
 464         pkt->ip.ihl = 5;
 465         pkt->ip.protocol = IPPROTO_TCP;
 466
 467         switch (ptype) {
 468         case MVM_TCP_TX_SYN:
 469         case MVM_TCP_TX_DATA:
 470         case MVM_TCP_TX_FIN:
 471                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 472                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 473                 pkt->ip.ttl = 128;
 474                 pkt->ip.saddr = tcp->src;
 475                 pkt->ip.daddr = tcp->dst;
 476                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 477                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 478                 /* overwritten for TX SYN later */
 479                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 480                 pkt->tcp.window = cpu_to_be16(65000);
 481                 break;
 482         case MVM_TCP_RX_SYNACK:
 483         case MVM_TCP_RX_ACK:
 484         case MVM_TCP_RX_WAKE:
 485                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 486                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 487                 pkt->ip.saddr = tcp->dst;
 488                 pkt->ip.daddr = tcp->src;
 489                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 490                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 491                 break;
 492         default:
 493                 WARN_ON(1);
 494                 return;
 495         }
 496
 497         switch (ptype) {
 498         case MVM_TCP_TX_SYN:
 499                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 500                 memset(pkt->data, 0x01, 8);
 501                 ip_tot_len += 8;
 502                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 503                 pkt->tcp.syn = 1;
 504                 break;
 505         case MVM_TCP_TX_DATA:
 506                 ip_tot_len += tcp->payload_len;
 507                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 508                 pkt->tcp.psh = 1;
 509                 pkt->tcp.ack = 1;
 510                 break;
 511         case MVM_TCP_TX_FIN:
 512                 pkt->tcp.fin = 1;
 513                 pkt->tcp.ack = 1;
 514                 break;
 515         case MVM_TCP_RX_SYNACK:
 516                 pkt->tcp.syn = 1;
 517                 pkt->tcp.ack = 1;
 518                 break;
 519         case MVM_TCP_RX_ACK:
 520                 pkt->tcp.ack = 1;
 521                 break;
 522         case MVM_TCP_RX_WAKE:
 523                 ip_tot_len += tcp->wake_len;
 524                 pkt->tcp.psh = 1;
 525                 pkt->tcp.ack = 1;
 526                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 527                 break;
 528         }
 529
 530         switch (ptype) {
 531         case MVM_TCP_TX_SYN:
 532         case MVM_TCP_TX_DATA:
 533         case MVM_TCP_TX_FIN:
 534                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 535                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 536                 break;
 537         case MVM_TCP_RX_WAKE:
 538                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 539                         u8 tmp = tcp->wake_mask[i];
 540                         mask[i + 6] |= tmp << 6;
 541                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 542                                 mask[i + 7] = tmp >> 2;
 543                 }
 544                 /* fall through for ethernet/IP/TCP headers mask */
 545         case MVM_TCP_RX_SYNACK:
 546         case MVM_TCP_RX_ACK:
 547                 mask[0] = 0xff; /* match ethernet */
 548                 /*
 549                  * match ethernet, ip.version, ip.ihl
 550                  * the ip.ihl half byte is really masked out by firmware
 551                  */
 552                 mask[1] = 0x7f;
 553                 mask[2] = 0x80; /* match ip.protocol */
 554                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 555                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 556                 mask[5] = 0x80; /* match tcp flags */
 557                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 558                 break;
 559         };
 560
 561         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 562                                             pkt->ip.saddr, pkt->ip.daddr);
 563 }
 564
 565 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 566                                         struct ieee80211_vif *vif,
 567                                         struct cfg80211_wowlan_tcp *tcp)
 568 {
 569         struct iwl_wowlan_remote_wake_config *cfg;
 570         struct iwl_host_cmd cmd = {
 571                 .id = REMOTE_WAKE_CONFIG_CMD,
 572                 .len = { sizeof(*cfg), },
 573                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 574         };
 575         int ret;
 576
 577         if (!tcp)
 578                 return 0;
 579
 580         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 581         if (!cfg)
 582                 return -ENOMEM;
 583         cmd.data[0] = cfg;
 584
 585         cfg->max_syn_retries = 10;
 586         cfg->max_data_retries = 10;
 587         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 588         cfg->tcp_ack_timeout = 1; /* seconds */
 589
 590         /* SYN (TX) */
 591         iwl_mvm_build_tcp_packet(
 592                 vif, tcp, cfg->syn_tx.data, NULL,
 593                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 594                 MVM_TCP_TX_SYN);
 595         cfg->syn_tx.info.tcp_payload_length = 0;
 596
 597         /* SYN/ACK (RX) */
 598         iwl_mvm_build_tcp_packet(
 599                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 600                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 601                 MVM_TCP_RX_SYNACK);
 602         cfg->synack_rx.info.tcp_payload_length = 0;
 603
 604         /* KEEPALIVE/ACK (TX) */
 605         iwl_mvm_build_tcp_packet(
 606                 vif, tcp, cfg->keepalive_tx.data, NULL,
 607                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 608                 MVM_TCP_TX_DATA);
 609         cfg->keepalive_tx.info.tcp_payload_length =
 610                 cpu_to_le16(tcp->payload_len);
 611         cfg->sequence_number_offset = tcp->payload_seq.offset;
 612         /* length must be 0..4, the field is little endian */
 613         cfg->sequence_number_length = tcp->payload_seq.len;
 614         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 615         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 616         if (tcp->payload_tok.len) {
 617                 cfg->token_offset = tcp->payload_tok.offset;
 618                 cfg->token_length = tcp->payload_tok.len;
 619                 cfg->num_tokens =
 620                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 621                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 622                        tcp->tokens_size);
 623         } else {
 624                 /* set tokens to max value to almost never run out */
 625                 cfg->num_tokens = cpu_to_le16(65535);
 626         }
 627
 628         /* ACK (RX) */
 629         iwl_mvm_build_tcp_packet(
 630                 vif, tcp, cfg->keepalive_ack_rx.data,
 631                 cfg->keepalive_ack_rx.rx_mask,
 632                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 633                 MVM_TCP_RX_ACK);
 634         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 635
 636         /* WAKEUP (RX) */
 637         iwl_mvm_build_tcp_packet(
 638                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 639                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 640                 MVM_TCP_RX_WAKE);
 641         cfg->wake_rx.info.tcp_payload_length =
 642                 cpu_to_le16(tcp->wake_len);
 643
 644         /* FIN */
 645         iwl_mvm_build_tcp_packet(
 646                 vif, tcp, cfg->fin_tx.data, NULL,
 647                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 648                 MVM_TCP_TX_FIN);
 649         cfg->fin_tx.info.tcp_payload_length = 0;
 650
 651         ret = iwl_mvm_send_cmd(mvm, &cmd);
 652         kfree(cfg);
 653
 654         return ret;
 655 }
 656
 657 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 658                                 struct ieee80211_sta *ap_sta)
 659 {
 660         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 661         struct ieee80211_chanctx_conf *ctx;
 662         u8 chains_static, chains_dynamic;
 663         struct cfg80211_chan_def chandef;
 664         int ret, i;
 665         struct iwl_binding_cmd binding_cmd = {};
 666         struct iwl_time_quota_cmd quota_cmd = {};
 667         u32 status;
 668         int size;
 669
 670         if (fw_has_capa(&mvm->fw->ucode_capa,
 671                         IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT)) {
 672                 size = sizeof(binding_cmd);
 673                 if (mvmvif->phy_ctxt->channel->band == NL80211_BAND_2GHZ ||
 674                     !iwl_mvm_is_cdb_supported(mvm))
 675                         binding_cmd.lmac_id = cpu_to_le32(IWL_LMAC_24G_INDEX);
 676                 else
 677                         binding_cmd.lmac_id = cpu_to_le32(IWL_LMAC_5G_INDEX);
 678         } else {
 679                 size = IWL_BINDING_CMD_SIZE_V1;
 680         }
 681
 682         /* add back the PHY */
 683         if (WARN_ON(!mvmvif->phy_ctxt))
 684                 return -EINVAL;
 685
 686         rcu_read_lock();
 687         ctx = rcu_dereference(vif->chanctx_conf);
 688         if (WARN_ON(!ctx)) {
 689                 rcu_read_unlock();
 690                 return -EINVAL;
 691         }
 692         chandef = ctx->def;
 693         chains_static = ctx->rx_chains_static;
 694         chains_dynamic = ctx->rx_chains_dynamic;
 695         rcu_read_unlock();
 696
 697         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 698                                    chains_static, chains_dynamic);
 699         if (ret)
 700                 return ret;
 701
 702         /* add back the MAC */
 703         mvmvif->uploaded = false;
 704
 705         if (WARN_ON(!vif->bss_conf.assoc))
 706                 return -EINVAL;
 707
 708         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 709         if (ret)
 710                 return ret;
 711
 712         /* add back binding - XXX refactor? */
 713         binding_cmd.id_and_color =
 714                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 715                                                 mvmvif->phy_ctxt->color));
 716         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 717         binding_cmd.phy =
 718                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 719                                                 mvmvif->phy_ctxt->color));
 720         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 721                                                               mvmvif->color));
 722         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 723                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 724
 725         status = 0;
 726         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 727                                           size, &binding_cmd, &status);
 728         if (ret) {
 729                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 730                 return ret;
 731         }
 732
 733         if (status) {
 734                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 735                 return -EIO;
 736         }
 737
 738         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false, 0);
 739         if (ret)
 740                 return ret;
 741         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 742
 743         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
 744         if (ret)
 745                 return ret;
 746
 747         /* and some quota */
 748         quota_cmd.quotas[0].id_and_color =
 749                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 750                                                 mvmvif->phy_ctxt->color));
 751         quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 752         quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 753
 754         for (i = 1; i < MAX_BINDINGS; i++)
 755                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 756
 757         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 758                                    sizeof(quota_cmd), &quota_cmd);
 759         if (ret)
 760                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 761
 762         if (iwl_mvm_is_lar_supported(mvm) && iwl_mvm_init_fw_regd(mvm))
 763                 IWL_ERR(mvm, "Failed to initialize D3 LAR information\n");
 764
 765         return 0;
 766 }
 767
 768 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 769                                        struct ieee80211_vif *vif)
 770 {
 771         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 772         struct iwl_nonqos_seq_query_cmd query_cmd = {
 773                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 774                 .mac_id_n_color =
 775                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 776                                                         mvmvif->color)),
 777         };
 778         struct iwl_host_cmd cmd = {
 779                 .id = NON_QOS_TX_COUNTER_CMD,
 780                 .flags = CMD_WANT_SKB,
 781         };
 782         int err;
 783         u32 size;
 784
 785         cmd.data[0] = &query_cmd;
 786         cmd.len[0] = sizeof(query_cmd);
 787
 788         err = iwl_mvm_send_cmd(mvm, &cmd);
 789         if (err)
 790                 return err;
 791
 792         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 793         if (size < sizeof(__le16)) {
 794                 err = -EINVAL;
 795         } else {
 796                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 797                 /* firmware returns next, not last-used seqno */
 798                 err = (u16) (err - 0x10);
 799         }
 800
 801         iwl_free_resp(&cmd);
 802         return err;
 803 }
 804
 805 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 806 {
 807         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 808         struct iwl_nonqos_seq_query_cmd query_cmd = {
 809                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 810                 .mac_id_n_color =
 811                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 812                                                         mvmvif->color)),
 813                 .value = cpu_to_le16(mvmvif->seqno),
 814         };
 815
 816         /* return if called during restart, not resume from D3 */
 817         if (!mvmvif->seqno_valid)
 818                 return;
 819
 820         mvmvif->seqno_valid = false;
 821
 822         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 823                                  sizeof(query_cmd), &query_cmd))
 824                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 825 }
 826
 827 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 828 {
 829         iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
 830
 831         iwl_mvm_stop_device(mvm);
 832         /*
 833          * Set the HW restart bit -- this is mostly true as we're
 834          * going to load new firmware and reprogram that, though
 835          * the reprogramming is going to be manual to avoid adding
 836          * all the MACs that aren't support.
 837          * We don't have to clear up everything though because the
 838          * reprogramming is manual. When we resume, we'll actually
 839          * go through a proper restart sequence again to switch
 840          * back to the runtime firmware image.
 841          */
 842         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 843
 844         /* the fw is reset, so all the keys are cleared */
 845         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 846
 847         mvm->ptk_ivlen = 0;
 848         mvm->ptk_icvlen = 0;
 849         mvm->ptk_ivlen = 0;
 850         mvm->ptk_icvlen = 0;
 851
 852         return iwl_mvm_load_d3_fw(mvm);
 853 }
 854
 855 static int
 856 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 857                           struct cfg80211_wowlan *wowlan,
 858                           struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 859                           struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 860                           struct ieee80211_sta *ap_sta)
 861 {
 862         int ret;
 863         struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 864
 865         /* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */
 866
 867         wowlan_config_cmd->is_11n_connection =
 868                                         ap_sta->ht_cap.ht_supported;
 869         wowlan_config_cmd->flags = ENABLE_L3_FILTERING |
 870                 ENABLE_NBNS_FILTERING | ENABLE_DHCP_FILTERING;
 871
 872         /* Query the last used seqno and set it */
 873         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 874         if (ret < 0)
 875                 return ret;
 876
 877         wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret);
 878
 879         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd);
 880
 881         if (wowlan->disconnect)
 882                 wowlan_config_cmd->wakeup_filter |=
 883                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 884                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 885         if (wowlan->magic_pkt)
 886                 wowlan_config_cmd->wakeup_filter |=
 887                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 888         if (wowlan->gtk_rekey_failure)
 889                 wowlan_config_cmd->wakeup_filter |=
 890                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 891         if (wowlan->eap_identity_req)
 892                 wowlan_config_cmd->wakeup_filter |=
 893                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 894         if (wowlan->four_way_handshake)
 895                 wowlan_config_cmd->wakeup_filter |=
 896                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 897         if (wowlan->n_patterns)
 898                 wowlan_config_cmd->wakeup_filter |=
 899                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 900
 901         if (wowlan->rfkill_release)
 902                 wowlan_config_cmd->wakeup_filter |=
 903                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 904
 905         if (wowlan->tcp) {
 906                 /*
 907                  * Set the "link change" (really "link lost") flag as well
 908                  * since that implies losing the TCP connection.
 909                  */
 910                 wowlan_config_cmd->wakeup_filter |=
 911                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 912                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 913                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 914                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 915         }
 916
 917         return 0;
 918 }
 919
 920 static void
 921 iwl_mvm_iter_d0i3_ap_keys(struct iwl_mvm *mvm,
 922                           struct ieee80211_vif *vif,
 923                           void (*iter)(struct ieee80211_hw *hw,
 924                                        struct ieee80211_vif *vif,
 925                                        struct ieee80211_sta *sta,
 926                                        struct ieee80211_key_conf *key,
 927                                        void *data),
 928                           void *data)
 929 {
 930         struct ieee80211_sta *ap_sta;
 931
 932         rcu_read_lock();
 933
 934         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id]);
 935         if (IS_ERR_OR_NULL(ap_sta))
 936                 goto out;
 937
 938         ieee80211_iter_keys_rcu(mvm->hw, vif, iter, data);
 939 out:
 940         rcu_read_unlock();
 941 }
 942
 943 int iwl_mvm_wowlan_config_key_params(struct iwl_mvm *mvm,
 944                                      struct ieee80211_vif *vif,
 945                                      bool d0i3,
 946                                      u32 cmd_flags)
 947 {
 948         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 949         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 950         bool unified = fw_has_capa(&mvm->fw->ucode_capa,
 951                                    IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
 952         struct wowlan_key_data key_data = {
 953                 .configure_keys = !d0i3 && !unified,
 954                 .use_rsc_tsc = false,
 955                 .tkip = &tkip_cmd,
 956                 .use_tkip = false,
 957         };
 958         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 959         int ret;
 960
 961         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 962         if (!key_data.rsc_tsc)
 963                 return -ENOMEM;
 964
 965         /*
 966          * if we have to configure keys, call ieee80211_iter_keys(),
 967          * as we need non-atomic context in order to take the
 968          * required locks.
 969          * for the d0i3 we can't use ieee80211_iter_keys(), as
 970          * taking (almost) any mutex might result in deadlock.
 971          */
 972         if (!d0i3) {
 973                 /*
 974                  * Note that currently we don't propagate cmd_flags
 975                  * to the iterator. In case of key_data.configure_keys,
 976                  * all the configured commands are SYNC, and
 977                  * iwl_mvm_wowlan_program_keys() will take care of
 978                  * locking/unlocking mvm->mutex.
 979                  */
 980                 ieee80211_iter_keys(mvm->hw, vif,
 981                                     iwl_mvm_wowlan_program_keys,
 982                                     &key_data);
 983         } else {
 984                 iwl_mvm_iter_d0i3_ap_keys(mvm, vif,
 985                                           iwl_mvm_wowlan_program_keys,
 986                                           &key_data);
 987         }
 988
 989         if (key_data.error) {
 990                 ret = -EIO;
 991                 goto out;
 992         }
 993
 994         if (key_data.use_rsc_tsc) {
 995                 ret = iwl_mvm_send_cmd_pdu(mvm,
 996                                            WOWLAN_TSC_RSC_PARAM, cmd_flags,
 997                                            sizeof(*key_data.rsc_tsc),
 998                                            key_data.rsc_tsc);
 999                 if (ret)
1000                         goto out;
1001         }
1002
1003         if (key_data.use_tkip &&
1004             !fw_has_api(&mvm->fw->ucode_capa,
1005                         IWL_UCODE_TLV_API_TKIP_MIC_KEYS)) {
1006                 ret = iwl_mvm_send_cmd_pdu(mvm,
1007                                            WOWLAN_TKIP_PARAM,
1008                                            cmd_flags, sizeof(tkip_cmd),
1009                                            &tkip_cmd);
1010                 if (ret)
1011                         goto out;
1012         }
1013
1014         /* configure rekey data only if offloaded rekey is supported (d3) */
1015         if (mvmvif->rekey_data.valid && !d0i3) {
1016                 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1017                 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
1018                        NL80211_KCK_LEN);
1019                 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1020                 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1021                        NL80211_KEK_LEN);
1022                 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1023                 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1024
1025                 ret = iwl_mvm_send_cmd_pdu(mvm,
1026                                            WOWLAN_KEK_KCK_MATERIAL, cmd_flags,
1027                                            sizeof(kek_kck_cmd),
1028                                            &kek_kck_cmd);
1029                 if (ret)
1030                         goto out;
1031         }
1032         ret = 0;
1033 out:
1034         kfree(key_data.rsc_tsc);
1035         return ret;
1036 }
1037
1038 static int
1039 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
1040                       struct cfg80211_wowlan *wowlan,
1041                       struct iwl_wowlan_config_cmd *wowlan_config_cmd,
1042                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
1043                       struct ieee80211_sta *ap_sta)
1044 {
1045         int ret;
1046         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1047                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1048
1049         if (!unified_image) {
1050                 ret = iwl_mvm_switch_to_d3(mvm);
1051                 if (ret)
1052                         return ret;
1053
1054                 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
1055                 if (ret)
1056                         return ret;
1057         }
1058
1059         if (!iwlwifi_mod_params.swcrypto) {
1060                 /*
1061                  * This needs to be unlocked due to lock ordering
1062                  * constraints. Since we're in the suspend path
1063                  * that isn't really a problem though.
1064                  */
1065                 mutex_unlock(&mvm->mutex);
1066                 ret = iwl_mvm_wowlan_config_key_params(mvm, vif, false,
1067                                                        CMD_ASYNC);
1068                 mutex_lock(&mvm->mutex);
1069                 if (ret)
1070                         return ret;
1071         }
1072
1073         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1074                                    sizeof(*wowlan_config_cmd),
1075                                    wowlan_config_cmd);
1076         if (ret)
1077                 return ret;
1078
1079         ret = iwl_mvm_send_patterns(mvm, wowlan);
1080         if (ret)
1081                 return ret;
1082
1083         ret = iwl_mvm_send_proto_offload(mvm, vif, false, true, 0);
1084         if (ret)
1085                 return ret;
1086
1087         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1088         return ret;
1089 }
1090
1091 static int
1092 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
1093                          struct cfg80211_wowlan *wowlan,
1094                          struct cfg80211_sched_scan_request *nd_config,
1095                          struct ieee80211_vif *vif)
1096 {
1097         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1098         int ret;
1099         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1100                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1101
1102         if (!unified_image) {
1103                 ret = iwl_mvm_switch_to_d3(mvm);
1104                 if (ret)
1105                         return ret;
1106         } else {
1107                 /* In theory, we wouldn't have to stop a running sched
1108                  * scan in order to start another one (for
1109                  * net-detect).  But in practice this doesn't seem to
1110                  * work properly, so stop any running sched_scan now.
1111                  */
1112                 ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1113                 if (ret)
1114                         return ret;
1115         }
1116
1117         /* rfkill release can be either for wowlan or netdetect */
1118         if (wowlan->rfkill_release)
1119                 wowlan_config_cmd.wakeup_filter |=
1120                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
1121
1122         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1123                                    sizeof(wowlan_config_cmd),
1124                                    &wowlan_config_cmd);
1125         if (ret)
1126                 return ret;
1127
1128         ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
1129                                        IWL_MVM_SCAN_NETDETECT);
1130         if (ret)
1131                 return ret;
1132
1133         if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
1134                 return -EBUSY;
1135
1136         /* save the sched scan matchsets... */
1137         if (nd_config->n_match_sets) {
1138                 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
1139                                              sizeof(*nd_config->match_sets) *
1140                                              nd_config->n_match_sets,
1141                                              GFP_KERNEL);
1142                 if (mvm->nd_match_sets)
1143                         mvm->n_nd_match_sets = nd_config->n_match_sets;
1144         }
1145
1146         /* ...and the sched scan channels for later reporting */
1147         mvm->nd_channels = kmemdup(nd_config->channels,
1148                                    sizeof(*nd_config->channels) *
1149                                    nd_config->n_channels,
1150                                    GFP_KERNEL);
1151         if (mvm->nd_channels)
1152                 mvm->n_nd_channels = nd_config->n_channels;
1153
1154         return 0;
1155 }
1156
1157 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
1158 {
1159         kfree(mvm->nd_match_sets);
1160         mvm->nd_match_sets = NULL;
1161         mvm->n_nd_match_sets = 0;
1162         kfree(mvm->nd_channels);
1163         mvm->nd_channels = NULL;
1164         mvm->n_nd_channels = 0;
1165 }
1166
1167 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
1168                              struct cfg80211_wowlan *wowlan,
1169                              bool test)
1170 {
1171         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1172         struct ieee80211_vif *vif = NULL;
1173         struct iwl_mvm_vif *mvmvif = NULL;
1174         struct ieee80211_sta *ap_sta = NULL;
1175         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1176                 /*
1177                  * Program the minimum sleep time to 10 seconds, as many
1178                  * platforms have issues processing a wakeup signal while
1179                  * still being in the process of suspending.
1180                  */
1181                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1182         };
1183         struct iwl_host_cmd d3_cfg_cmd = {
1184                 .id = D3_CONFIG_CMD,
1185                 .flags = CMD_WANT_SKB,
1186                 .data[0] = &d3_cfg_cmd_data,
1187                 .len[0] = sizeof(d3_cfg_cmd_data),
1188         };
1189         int ret;
1190         int len __maybe_unused;
1191         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1192                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1193
1194         if (!wowlan) {
1195                 /*
1196                  * mac80211 shouldn't get here, but for D3 test
1197                  * it doesn't warrant a warning
1198                  */
1199                 WARN_ON(!test);
1200                 return -EINVAL;
1201         }
1202
1203         mutex_lock(&mvm->mutex);
1204
1205         vif = iwl_mvm_get_bss_vif(mvm);
1206         if (IS_ERR_OR_NULL(vif)) {
1207                 ret = 1;
1208                 goto out_noreset;
1209         }
1210
1211         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1212
1213         if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA) {
1214                 /* if we're not associated, this must be netdetect */
1215                 if (!wowlan->nd_config) {
1216                         ret = 1;
1217                         goto out_noreset;
1218                 }
1219
1220                 ret = iwl_mvm_netdetect_config(
1221                         mvm, wowlan, wowlan->nd_config, vif);
1222                 if (ret)
1223                         goto out;
1224
1225                 mvm->net_detect = true;
1226         } else {
1227                 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1228
1229                 ap_sta = rcu_dereference_protected(
1230                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1231                         lockdep_is_held(&mvm->mutex));
1232                 if (IS_ERR_OR_NULL(ap_sta)) {
1233                         ret = -EINVAL;
1234                         goto out_noreset;
1235                 }
1236
1237                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1238                                                 vif, mvmvif, ap_sta);
1239                 if (ret)
1240                         goto out_noreset;
1241                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1242                                             vif, mvmvif, ap_sta);
1243                 if (ret)
1244                         goto out;
1245
1246                 mvm->net_detect = false;
1247         }
1248
1249         ret = iwl_mvm_power_update_device(mvm);
1250         if (ret)
1251                 goto out;
1252
1253         ret = iwl_mvm_power_update_mac(mvm);
1254         if (ret)
1255                 goto out;
1256
1257 #ifdef CONFIG_IWLWIFI_DEBUGFS
1258         if (mvm->d3_wake_sysassert)
1259                 d3_cfg_cmd_data.wakeup_flags |=
1260                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1261 #endif
1262
1263         /* must be last -- this switches firmware state */
1264         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1265         if (ret)
1266                 goto out;
1267 #ifdef CONFIG_IWLWIFI_DEBUGFS
1268         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1269         if (len >= sizeof(u32)) {
1270                 mvm->d3_test_pme_ptr =
1271                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1272         }
1273 #endif
1274         iwl_free_resp(&d3_cfg_cmd);
1275
1276         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1277
1278         iwl_trans_d3_suspend(mvm->trans, test, !unified_image);
1279  out:
1280         if (ret < 0) {
1281                 iwl_mvm_free_nd(mvm);
1282
1283                 if (!unified_image) {
1284                         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1285                         if (mvm->fw_restart > 0) {
1286                                 mvm->fw_restart--;
1287                                 ieee80211_restart_hw(mvm->hw);
1288                         }
1289                 }
1290         }
1291  out_noreset:
1292         mutex_unlock(&mvm->mutex);
1293
1294         return ret;
1295 }
1296
1297 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1298 {
1299         struct iwl_notification_wait wait_d3;
1300         static const u16 d3_notif[] = { D3_CONFIG_CMD };
1301         int ret;
1302
1303         iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1304                                    d3_notif, ARRAY_SIZE(d3_notif),
1305                                    NULL, NULL);
1306
1307         ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1308         if (ret)
1309                 goto remove_notif;
1310
1311         ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1312         WARN_ON_ONCE(ret);
1313         return ret;
1314
1315 remove_notif:
1316         iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1317         return ret;
1318 }
1319
1320 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1321 {
1322         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1323         struct iwl_trans *trans = mvm->trans;
1324         int ret;
1325
1326         /* make sure the d0i3 exit work is not pending */
1327         flush_work(&mvm->d0i3_exit_work);
1328
1329         ret = iwl_trans_suspend(trans);
1330         if (ret)
1331                 return ret;
1332
1333         if (wowlan->any) {
1334                 trans->system_pm_mode = IWL_PLAT_PM_MODE_D0I3;
1335
1336                 if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
1337                         ret = iwl_mvm_enter_d0i3_sync(mvm);
1338
1339                         if (ret)
1340                                 return ret;
1341                 }
1342
1343                 mutex_lock(&mvm->d0i3_suspend_mutex);
1344                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1345                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1346
1347                 iwl_trans_d3_suspend(trans, false, false);
1348
1349                 return 0;
1350         }
1351
1352         trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
1353
1354         return __iwl_mvm_suspend(hw, wowlan, false);
1355 }
1356
1357 /* converted data from the different status responses */
1358 struct iwl_wowlan_status_data {
1359         u16 pattern_number;
1360         u16 qos_seq_ctr[8];
1361         u32 wakeup_reasons;
1362         u32 wake_packet_length;
1363         u32 wake_packet_bufsize;
1364         const u8 *wake_packet;
1365 };
1366
1367 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1368                                           struct ieee80211_vif *vif,
1369                                           struct iwl_wowlan_status_data *status)
1370 {
1371         struct sk_buff *pkt = NULL;
1372         struct cfg80211_wowlan_wakeup wakeup = {
1373                 .pattern_idx = -1,
1374         };
1375         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1376         u32 reasons = status->wakeup_reasons;
1377
1378         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1379                 wakeup_report = NULL;
1380                 goto report;
1381         }
1382
1383         pm_wakeup_event(mvm->dev, 0);
1384
1385         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1386                 wakeup.magic_pkt = true;
1387
1388         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1389                 wakeup.pattern_idx =
1390                         status->pattern_number;
1391
1392         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1393                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1394                 wakeup.disconnect = true;
1395
1396         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1397                 wakeup.gtk_rekey_failure = true;
1398
1399         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1400                 wakeup.rfkill_release = true;
1401
1402         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1403                 wakeup.eap_identity_req = true;
1404
1405         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1406                 wakeup.four_way_handshake = true;
1407
1408         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1409                 wakeup.tcp_connlost = true;
1410
1411         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1412                 wakeup.tcp_nomoretokens = true;
1413
1414         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1415                 wakeup.tcp_match = true;
1416
1417         if (status->wake_packet_bufsize) {
1418                 int pktsize = status->wake_packet_bufsize;
1419                 int pktlen = status->wake_packet_length;
1420                 const u8 *pktdata = status->wake_packet;
1421                 struct ieee80211_hdr *hdr = (void *)pktdata;
1422                 int truncated = pktlen - pktsize;
1423
1424                 /* this would be a firmware bug */
1425                 if (WARN_ON_ONCE(truncated < 0))
1426                         truncated = 0;
1427
1428                 if (ieee80211_is_data(hdr->frame_control)) {
1429                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1430                         int ivlen = 0, icvlen = 4; /* also FCS */
1431
1432                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1433                         if (!pkt)
1434                                 goto report;
1435
1436                         skb_put_data(pkt, pktdata, hdrlen);
1437                         pktdata += hdrlen;
1438                         pktsize -= hdrlen;
1439
1440                         if (ieee80211_has_protected(hdr->frame_control)) {
1441                                 /*
1442                                  * This is unlocked and using gtk_i(c)vlen,
1443                                  * but since everything is under RTNL still
1444                                  * that's not really a problem - changing
1445                                  * it would be difficult.
1446                                  */
1447                                 if (is_multicast_ether_addr(hdr->addr1)) {
1448                                         ivlen = mvm->gtk_ivlen;
1449                                         icvlen += mvm->gtk_icvlen;
1450                                 } else {
1451                                         ivlen = mvm->ptk_ivlen;
1452                                         icvlen += mvm->ptk_icvlen;
1453                                 }
1454                         }
1455
1456                         /* if truncated, FCS/ICV is (partially) gone */
1457                         if (truncated >= icvlen) {
1458                                 icvlen = 0;
1459                                 truncated -= icvlen;
1460                         } else {
1461                                 icvlen -= truncated;
1462                                 truncated = 0;
1463                         }
1464
1465                         pktsize -= ivlen + icvlen;
1466                         pktdata += ivlen;
1467
1468                         skb_put_data(pkt, pktdata, pktsize);
1469
1470                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1471                                 goto report;
1472                         wakeup.packet = pkt->data;
1473                         wakeup.packet_present_len = pkt->len;
1474                         wakeup.packet_len = pkt->len - truncated;
1475                         wakeup.packet_80211 = false;
1476                 } else {
1477                         int fcslen = 4;
1478
1479                         if (truncated >= 4) {
1480                                 truncated -= 4;
1481                                 fcslen = 0;
1482                         } else {
1483                                 fcslen -= truncated;
1484                                 truncated = 0;
1485                         }
1486                         pktsize -= fcslen;
1487                         wakeup.packet = status->wake_packet;
1488                         wakeup.packet_present_len = pktsize;
1489                         wakeup.packet_len = pktlen - truncated;
1490                         wakeup.packet_80211 = true;
1491                 }
1492         }
1493
1494  report:
1495         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1496         kfree_skb(pkt);
1497 }
1498
1499 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1500                                   struct ieee80211_key_seq *seq)
1501 {
1502         u64 pn;
1503
1504         pn = le64_to_cpu(sc->pn);
1505         seq->ccmp.pn[0] = pn >> 40;
1506         seq->ccmp.pn[1] = pn >> 32;
1507         seq->ccmp.pn[2] = pn >> 24;
1508         seq->ccmp.pn[3] = pn >> 16;
1509         seq->ccmp.pn[4] = pn >> 8;
1510         seq->ccmp.pn[5] = pn;
1511 }
1512
1513 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1514                                    struct ieee80211_key_seq *seq)
1515 {
1516         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1517         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1518 }
1519
1520 static void iwl_mvm_set_aes_rx_seq(struct iwl_mvm *mvm, struct aes_sc *scs,
1521                                    struct ieee80211_sta *sta,
1522                                    struct ieee80211_key_conf *key)
1523 {
1524         int tid;
1525
1526         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1527
1528         if (sta && iwl_mvm_has_new_rx_api(mvm)) {
1529                 struct iwl_mvm_sta *mvmsta;
1530                 struct iwl_mvm_key_pn *ptk_pn;
1531
1532                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1533
1534                 ptk_pn = rcu_dereference_protected(mvmsta->ptk_pn[key->keyidx],
1535                                                    lockdep_is_held(&mvm->mutex));
1536                 if (WARN_ON(!ptk_pn))
1537                         return;
1538
1539                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1540                         struct ieee80211_key_seq seq = {};
1541                         int i;
1542
1543                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1544                         ieee80211_set_key_rx_seq(key, tid, &seq);
1545                         for (i = 1; i < mvm->trans->num_rx_queues; i++)
1546                                 memcpy(ptk_pn->q[i].pn[tid],
1547                                        seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
1548                 }
1549         } else {
1550                 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1551                         struct ieee80211_key_seq seq = {};
1552
1553                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1554                         ieee80211_set_key_rx_seq(key, tid, &seq);
1555                 }
1556         }
1557 }
1558
1559 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1560                                     struct ieee80211_key_conf *key)
1561 {
1562         int tid;
1563
1564         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1565
1566         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1567                 struct ieee80211_key_seq seq = {};
1568
1569                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1570                 ieee80211_set_key_rx_seq(key, tid, &seq);
1571         }
1572 }
1573
1574 static void iwl_mvm_set_key_rx_seq(struct iwl_mvm *mvm,
1575                                    struct ieee80211_key_conf *key,
1576                                    struct iwl_wowlan_status *status)
1577 {
1578         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1579
1580         switch (key->cipher) {
1581         case WLAN_CIPHER_SUITE_CCMP:
1582                 iwl_mvm_set_aes_rx_seq(mvm, rsc->aes.multicast_rsc, NULL, key);
1583                 break;
1584         case WLAN_CIPHER_SUITE_TKIP:
1585                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1586                 break;
1587         default:
1588                 WARN_ON(1);
1589         }
1590 }
1591
1592 struct iwl_mvm_d3_gtk_iter_data {
1593         struct iwl_mvm *mvm;
1594         struct iwl_wowlan_status *status;
1595         void *last_gtk;
1596         u32 cipher;
1597         bool find_phase, unhandled_cipher;
1598         int num_keys;
1599 };
1600
1601 static void iwl_mvm_d3_update_keys(struct ieee80211_hw *hw,
1602                                    struct ieee80211_vif *vif,
1603                                    struct ieee80211_sta *sta,
1604                                    struct ieee80211_key_conf *key,
1605                                    void *_data)
1606 {
1607         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1608
1609         if (data->unhandled_cipher)
1610                 return;
1611
1612         switch (key->cipher) {
1613         case WLAN_CIPHER_SUITE_WEP40:
1614         case WLAN_CIPHER_SUITE_WEP104:
1615                 /* ignore WEP completely, nothing to do */
1616                 return;
1617         case WLAN_CIPHER_SUITE_CCMP:
1618         case WLAN_CIPHER_SUITE_TKIP:
1619                 /* we support these */
1620                 break;
1621         default:
1622                 /* everything else (even CMAC for MFP) - disconnect from AP */
1623                 data->unhandled_cipher = true;
1624                 return;
1625         }
1626
1627         data->num_keys++;
1628
1629         /*
1630          * pairwise key - update sequence counters only;
1631          * note that this assumes no TDLS sessions are active
1632          */
1633         if (sta) {
1634                 struct ieee80211_key_seq seq = {};
1635                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1636
1637                 if (data->find_phase)
1638                         return;
1639
1640                 switch (key->cipher) {
1641                 case WLAN_CIPHER_SUITE_CCMP:
1642                         iwl_mvm_set_aes_rx_seq(data->mvm, sc->aes.unicast_rsc,
1643                                                sta, key);
1644                         atomic64_set(&key->tx_pn, le64_to_cpu(sc->aes.tsc.pn));
1645                         break;
1646                 case WLAN_CIPHER_SUITE_TKIP:
1647                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1648                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1649                         atomic64_set(&key->tx_pn,
1650                                      (u64)seq.tkip.iv16 |
1651                                      ((u64)seq.tkip.iv32 << 16));
1652                         break;
1653                 }
1654
1655                 /* that's it for this key */
1656                 return;
1657         }
1658
1659         if (data->find_phase) {
1660                 data->last_gtk = key;
1661                 data->cipher = key->cipher;
1662                 return;
1663         }
1664
1665         if (data->status->num_of_gtk_rekeys)
1666                 ieee80211_remove_key(key);
1667         else if (data->last_gtk == key)
1668                 iwl_mvm_set_key_rx_seq(data->mvm, key, data->status);
1669 }
1670
1671 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1672                                           struct ieee80211_vif *vif,
1673                                           struct iwl_wowlan_status *status)
1674 {
1675         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1676         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1677                 .mvm = mvm,
1678                 .status = status,
1679         };
1680         u32 disconnection_reasons =
1681                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1682                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1683
1684         if (!status || !vif->bss_conf.bssid)
1685                 return false;
1686
1687         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1688                 return false;
1689
1690         /* find last GTK that we used initially, if any */
1691         gtkdata.find_phase = true;
1692         ieee80211_iter_keys(mvm->hw, vif,
1693                             iwl_mvm_d3_update_keys, &gtkdata);
1694         /* not trying to keep connections with MFP/unhandled ciphers */
1695         if (gtkdata.unhandled_cipher)
1696                 return false;
1697         if (!gtkdata.num_keys)
1698                 goto out;
1699         if (!gtkdata.last_gtk)
1700                 return false;
1701
1702         /*
1703          * invalidate all other GTKs that might still exist and update
1704          * the one that we used
1705          */
1706         gtkdata.find_phase = false;
1707         ieee80211_iter_keys(mvm->hw, vif,
1708                             iwl_mvm_d3_update_keys, &gtkdata);
1709
1710         if (status->num_of_gtk_rekeys) {
1711                 struct ieee80211_key_conf *key;
1712                 struct {
1713                         struct ieee80211_key_conf conf;
1714                         u8 key[32];
1715                 } conf = {
1716                         .conf.cipher = gtkdata.cipher,
1717                         .conf.keyidx = status->gtk.key_index,
1718                 };
1719
1720                 switch (gtkdata.cipher) {
1721                 case WLAN_CIPHER_SUITE_CCMP:
1722                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1723                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1724                                WLAN_KEY_LEN_CCMP);
1725                         break;
1726                 case WLAN_CIPHER_SUITE_TKIP:
1727                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1728                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1729                         /* leave TX MIC key zeroed, we don't use it anyway */
1730                         memcpy(conf.conf.key +
1731                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1732                                status->gtk.tkip_mic_key, 8);
1733                         break;
1734                 }
1735
1736                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1737                 if (IS_ERR(key))
1738                         return false;
1739                 iwl_mvm_set_key_rx_seq(mvm, key, status);
1740         }
1741
1742         if (status->num_of_gtk_rekeys) {
1743                 __be64 replay_ctr =
1744                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1745                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1746                                            (void *)&replay_ctr, GFP_KERNEL);
1747         }
1748
1749 out:
1750         mvmvif->seqno_valid = true;
1751         /* +0x10 because the set API expects next-to-use, not last-used */
1752         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1753
1754         return true;
1755 }
1756
1757 static struct iwl_wowlan_status *
1758 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1759 {
1760         u32 base = mvm->error_event_table[0];
1761         struct error_table_start {
1762                 /* cf. struct iwl_error_event_table */
1763                 u32 valid;
1764                 u32 error_id;
1765         } err_info;
1766         struct iwl_host_cmd cmd = {
1767                 .id = WOWLAN_GET_STATUSES,
1768                 .flags = CMD_WANT_SKB,
1769         };
1770         struct iwl_wowlan_status *status, *fw_status;
1771         int ret, len, status_size;
1772
1773         iwl_trans_read_mem_bytes(mvm->trans, base,
1774                                  &err_info, sizeof(err_info));
1775
1776         if (err_info.valid) {
1777                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1778                          err_info.valid, err_info.error_id);
1779                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1780                         struct cfg80211_wowlan_wakeup wakeup = {
1781                                 .rfkill_release = true,
1782                         };
1783                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1784                                                        GFP_KERNEL);
1785                 }
1786                 return ERR_PTR(-EIO);
1787         }
1788
1789         /* only for tracing for now */
1790         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1791         if (ret)
1792                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1793
1794         ret = iwl_mvm_send_cmd(mvm, &cmd);
1795         if (ret) {
1796                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1797                 return ERR_PTR(ret);
1798         }
1799
1800         status_size = sizeof(*fw_status);
1801
1802         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1803         if (len < status_size) {
1804                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1805                 fw_status = ERR_PTR(-EIO);
1806                 goto out_free_resp;
1807         }
1808
1809         status = (void *)cmd.resp_pkt->data;
1810         if (len != (status_size +
1811                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1812                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1813                 fw_status = ERR_PTR(-EIO);
1814                 goto out_free_resp;
1815         }
1816
1817         fw_status = kmemdup(status, len, GFP_KERNEL);
1818
1819 out_free_resp:
1820         iwl_free_resp(&cmd);
1821         return fw_status;
1822 }
1823
1824 /* releases the MVM mutex */
1825 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1826                                          struct ieee80211_vif *vif)
1827 {
1828         struct iwl_wowlan_status_data status;
1829         struct iwl_wowlan_status *fw_status;
1830         int i;
1831         bool keep;
1832         struct iwl_mvm_sta *mvm_ap_sta;
1833
1834         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1835         if (IS_ERR_OR_NULL(fw_status))
1836                 goto out_unlock;
1837
1838         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1839         for (i = 0; i < 8; i++)
1840                 status.qos_seq_ctr[i] =
1841                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1842         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1843         status.wake_packet_length =
1844                 le32_to_cpu(fw_status->wake_packet_length);
1845         status.wake_packet_bufsize =
1846                 le32_to_cpu(fw_status->wake_packet_bufsize);
1847         status.wake_packet = fw_status->wake_packet;
1848
1849         /* still at hard-coded place 0 for D3 image */
1850         mvm_ap_sta = iwl_mvm_sta_from_staid_protected(mvm, 0);
1851         if (!mvm_ap_sta)
1852                 goto out_free;
1853
1854         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1855                 u16 seq = status.qos_seq_ctr[i];
1856                 /* firmware stores last-used value, we store next value */
1857                 seq += 0x10;
1858                 mvm_ap_sta->tid_data[i].seq_number = seq;
1859         }
1860
1861         /* now we have all the data we need, unlock to avoid mac80211 issues */
1862         mutex_unlock(&mvm->mutex);
1863
1864         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1865
1866         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1867
1868         kfree(fw_status);
1869         return keep;
1870
1871 out_free:
1872         kfree(fw_status);
1873 out_unlock:
1874         mutex_unlock(&mvm->mutex);
1875         return false;
1876 }
1877
1878 void iwl_mvm_d0i3_update_keys(struct iwl_mvm *mvm,
1879                               struct ieee80211_vif *vif,
1880                               struct iwl_wowlan_status *status)
1881 {
1882         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1883                 .mvm = mvm,
1884                 .status = status,
1885         };
1886
1887         /*
1888          * rekey handling requires taking locks that can't be taken now.
1889          * however, d0i3 doesn't offload rekey, so we're fine.
1890          */
1891         if (WARN_ON_ONCE(status->num_of_gtk_rekeys))
1892                 return;
1893
1894         /* find last GTK that we used initially, if any */
1895         gtkdata.find_phase = true;
1896         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1897
1898         gtkdata.find_phase = false;
1899         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1900 }
1901
1902 struct iwl_mvm_nd_query_results {
1903         u32 matched_profiles;
1904         struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1905 };
1906
1907 static int
1908 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1909                                 struct iwl_mvm_nd_query_results *results)
1910 {
1911         struct iwl_scan_offload_profiles_query *query;
1912         struct iwl_host_cmd cmd = {
1913                 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1914                 .flags = CMD_WANT_SKB,
1915         };
1916         int ret, len;
1917
1918         ret = iwl_mvm_send_cmd(mvm, &cmd);
1919         if (ret) {
1920                 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1921                 return ret;
1922         }
1923
1924         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1925         if (len < sizeof(*query)) {
1926                 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1927                 ret = -EIO;
1928                 goto out_free_resp;
1929         }
1930
1931         query = (void *)cmd.resp_pkt->data;
1932
1933         results->matched_profiles = le32_to_cpu(query->matched_profiles);
1934         memcpy(results->matches, query->matches, sizeof(results->matches));
1935
1936 #ifdef CONFIG_IWLWIFI_DEBUGFS
1937         mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1938 #endif
1939
1940 out_free_resp:
1941         iwl_free_resp(&cmd);
1942         return ret;
1943 }
1944
1945 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1946                                             struct ieee80211_vif *vif)
1947 {
1948         struct cfg80211_wowlan_nd_info *net_detect = NULL;
1949         struct cfg80211_wowlan_wakeup wakeup = {
1950                 .pattern_idx = -1,
1951         };
1952         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1953         struct iwl_mvm_nd_query_results query;
1954         struct iwl_wowlan_status *fw_status;
1955         unsigned long matched_profiles;
1956         u32 reasons = 0;
1957         int i, j, n_matches, ret;
1958
1959         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1960         if (!IS_ERR_OR_NULL(fw_status)) {
1961                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1962                 kfree(fw_status);
1963         }
1964
1965         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1966                 wakeup.rfkill_release = true;
1967
1968         if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1969                 goto out;
1970
1971         ret = iwl_mvm_netdetect_query_results(mvm, &query);
1972         if (ret || !query.matched_profiles) {
1973                 wakeup_report = NULL;
1974                 goto out;
1975         }
1976
1977         matched_profiles = query.matched_profiles;
1978         if (mvm->n_nd_match_sets) {
1979                 n_matches = hweight_long(matched_profiles);
1980         } else {
1981                 IWL_ERR(mvm, "no net detect match information available\n");
1982                 n_matches = 0;
1983         }
1984
1985         net_detect = kzalloc(sizeof(*net_detect) +
1986                              (n_matches * sizeof(net_detect->matches[0])),
1987                              GFP_KERNEL);
1988         if (!net_detect || !n_matches)
1989                 goto out_report_nd;
1990
1991         for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1992                 struct iwl_scan_offload_profile_match *fw_match;
1993                 struct cfg80211_wowlan_nd_match *match;
1994                 int idx, n_channels = 0;
1995
1996                 fw_match = &query.matches[i];
1997
1998                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1999                         n_channels += hweight8(fw_match->matching_channels[j]);
2000
2001                 match = kzalloc(sizeof(*match) +
2002                                 (n_channels * sizeof(*match->channels)),
2003                                 GFP_KERNEL);
2004                 if (!match)
2005                         goto out_report_nd;
2006
2007                 net_detect->matches[net_detect->n_matches++] = match;
2008
2009                 /* We inverted the order of the SSIDs in the scan
2010                  * request, so invert the index here.
2011                  */
2012                 idx = mvm->n_nd_match_sets - i - 1;
2013                 match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
2014                 memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
2015                        match->ssid.ssid_len);
2016
2017                 if (mvm->n_nd_channels < n_channels)
2018                         continue;
2019
2020                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
2021                         if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
2022                                 match->channels[match->n_channels++] =
2023                                         mvm->nd_channels[j]->center_freq;
2024         }
2025
2026 out_report_nd:
2027         wakeup.net_detect = net_detect;
2028 out:
2029         iwl_mvm_free_nd(mvm);
2030
2031         mutex_unlock(&mvm->mutex);
2032         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
2033
2034         if (net_detect) {
2035                 for (i = 0; i < net_detect->n_matches; i++)
2036                         kfree(net_detect->matches[i]);
2037                 kfree(net_detect);
2038         }
2039 }
2040
2041 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
2042 {
2043 #ifdef CONFIG_IWLWIFI_DEBUGFS
2044         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
2045         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
2046         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
2047
2048         if (!mvm->store_d3_resume_sram)
2049                 return;
2050
2051         if (!mvm->d3_resume_sram) {
2052                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
2053                 if (!mvm->d3_resume_sram)
2054                         return;
2055         }
2056
2057         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
2058 #endif
2059 }
2060
2061 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
2062                                        struct ieee80211_vif *vif)
2063 {
2064         /* skip the one we keep connection on */
2065         if (data == vif)
2066                 return;
2067
2068         if (vif->type == NL80211_IFTYPE_STATION)
2069                 ieee80211_resume_disconnect(vif);
2070 }
2071
2072 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
2073 {
2074         struct ieee80211_vif *vif = NULL;
2075         int ret = 1;
2076         enum iwl_d3_status d3_status;
2077         bool keep = false;
2078         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2079                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2080         bool d0i3_first = fw_has_capa(&mvm->fw->ucode_capa,
2081                                       IWL_UCODE_TLV_CAPA_D0I3_END_FIRST);
2082
2083         mutex_lock(&mvm->mutex);
2084
2085         /* get the BSS vif pointer again */
2086         vif = iwl_mvm_get_bss_vif(mvm);
2087         if (IS_ERR_OR_NULL(vif))
2088                 goto err;
2089
2090         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test, !unified_image);
2091         if (ret)
2092                 goto err;
2093
2094         if (d3_status != IWL_D3_STATUS_ALIVE) {
2095                 IWL_INFO(mvm, "Device was reset during suspend\n");
2096                 goto err;
2097         }
2098
2099         /* query SRAM first in case we want event logging */
2100         iwl_mvm_read_d3_sram(mvm);
2101
2102         if (d0i3_first) {
2103                 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, 0, 0, NULL);
2104                 if (ret < 0) {
2105                         IWL_ERR(mvm, "Failed to send D0I3_END_CMD first (%d)\n",
2106                                 ret);
2107                         goto err;
2108                 }
2109         }
2110
2111         /*
2112          * Query the current location and source from the D3 firmware so we
2113          * can play it back when we re-intiailize the D0 firmware
2114          */
2115         iwl_mvm_update_changed_regdom(mvm);
2116
2117         if (!unified_image)
2118                 /*  Re-configure default SAR profile */
2119                 iwl_mvm_sar_select_profile(mvm, 1, 1);
2120
2121         if (mvm->net_detect) {
2122                 /* If this is a non-unified image, we restart the FW,
2123                  * so no need to stop the netdetect scan.  If that
2124                  * fails, continue and try to get the wake-up reasons,
2125                  * but trigger a HW restart by keeping a failure code
2126                  * in ret.
2127                  */
2128                 if (unified_image)
2129                         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_NETDETECT,
2130                                                 false);
2131
2132                 iwl_mvm_query_netdetect_reasons(mvm, vif);
2133                 /* has unlocked the mutex, so skip that */
2134                 goto out;
2135         } else {
2136                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
2137 #ifdef CONFIG_IWLWIFI_DEBUGFS
2138                 if (keep)
2139                         mvm->keep_vif = vif;
2140 #endif
2141                 /* has unlocked the mutex, so skip that */
2142                 goto out_iterate;
2143         }
2144
2145 err:
2146         iwl_mvm_free_nd(mvm);
2147         mutex_unlock(&mvm->mutex);
2148
2149 out_iterate:
2150         if (!test)
2151                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
2152                         IEEE80211_IFACE_ITER_NORMAL,
2153                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
2154
2155 out:
2156         /* no need to reset the device in unified images, if successful */
2157         if (unified_image && !ret) {
2158                 /* nothing else to do if we already sent D0I3_END_CMD */
2159                 if (d0i3_first)
2160                         return 0;
2161
2162                 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, 0, 0, NULL);
2163                 if (!ret)
2164                         return 0;
2165         }
2166
2167         /*
2168          * Reconfigure the device in one of the following cases:
2169          * 1. We are not using a unified image
2170          * 2. We are using a unified image but had an error while exiting D3
2171          */
2172         set_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status);
2173         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
2174         /*
2175          * When switching images we return 1, which causes mac80211
2176          * to do a reconfig with IEEE80211_RECONFIG_TYPE_RESTART.
2177          * This type of reconfig calls iwl_mvm_restart_complete(),
2178          * where we unref the IWL_MVM_REF_UCODE_DOWN, so we need
2179          * to take the reference here.
2180          */
2181         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
2182
2183         return 1;
2184 }
2185
2186 static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
2187 {
2188         iwl_trans_resume(mvm->trans);
2189
2190         return __iwl_mvm_resume(mvm, false);
2191 }
2192
2193 static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
2194 {
2195         bool exit_now;
2196         enum iwl_d3_status d3_status;
2197         struct iwl_trans *trans = mvm->trans;
2198
2199         iwl_trans_d3_resume(trans, &d3_status, false, false);
2200
2201         /*
2202          * make sure to clear D0I3_DEFER_WAKEUP before
2203          * calling iwl_trans_resume(), which might wait
2204          * for d0i3 exit completion.
2205          */
2206         mutex_lock(&mvm->d0i3_suspend_mutex);
2207         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
2208         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
2209                                         &mvm->d0i3_suspend_flags);
2210         mutex_unlock(&mvm->d0i3_suspend_mutex);
2211         if (exit_now) {
2212                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
2213                 _iwl_mvm_exit_d0i3(mvm);
2214         }
2215
2216         iwl_trans_resume(trans);
2217
2218         if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
2219                 int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
2220
2221                 if (ret)
2222                         return ret;
2223                 /*
2224                  * d0i3 exit will be deferred until reconfig_complete.
2225                  * make sure there we are out of d0i3.
2226                  */
2227         }
2228         return 0;
2229 }
2230
2231 int iwl_mvm_resume(struct ieee80211_hw *hw)
2232 {
2233         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2234         int ret;
2235
2236         if (mvm->trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2237                 ret = iwl_mvm_resume_d0i3(mvm);
2238         else
2239                 ret = iwl_mvm_resume_d3(mvm);
2240
2241         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2242
2243         return ret;
2244 }
2245
2246 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2247 {
2248         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2249
2250         device_set_wakeup_enable(mvm->trans->dev, enabled);
2251 }
2252
2253 #ifdef CONFIG_IWLWIFI_DEBUGFS
2254 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2255 {
2256         struct iwl_mvm *mvm = inode->i_private;
2257         int err;
2258
2259         if (mvm->d3_test_active)
2260                 return -EBUSY;
2261
2262         file->private_data = inode->i_private;
2263
2264         ieee80211_stop_queues(mvm->hw);
2265         synchronize_net();
2266
2267         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
2268
2269         /* start pseudo D3 */
2270         rtnl_lock();
2271         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2272         rtnl_unlock();
2273         if (err > 0)
2274                 err = -EINVAL;
2275         if (err) {
2276                 ieee80211_wake_queues(mvm->hw);
2277                 return err;
2278         }
2279         mvm->d3_test_active = true;
2280         mvm->keep_vif = NULL;
2281         return 0;
2282 }
2283
2284 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2285                                     size_t count, loff_t *ppos)
2286 {
2287         struct iwl_mvm *mvm = file->private_data;
2288         u32 pme_asserted;
2289
2290         while (true) {
2291                 /* read pme_ptr if available */
2292                 if (mvm->d3_test_pme_ptr) {
2293                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
2294                                                 mvm->d3_test_pme_ptr);
2295                         if (pme_asserted)
2296                                 break;
2297                 }
2298
2299                 if (msleep_interruptible(100))
2300                         break;
2301         }
2302
2303         return 0;
2304 }
2305
2306 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2307                                               struct ieee80211_vif *vif)
2308 {
2309         /* skip the one we keep connection on */
2310         if (_data == vif)
2311                 return;
2312
2313         if (vif->type == NL80211_IFTYPE_STATION)
2314                 ieee80211_connection_loss(vif);
2315 }
2316
2317 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2318 {
2319         struct iwl_mvm *mvm = inode->i_private;
2320         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2321                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2322
2323         mvm->d3_test_active = false;
2324
2325         rtnl_lock();
2326         __iwl_mvm_resume(mvm, true);
2327         rtnl_unlock();
2328
2329         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2330
2331         iwl_abort_notification_waits(&mvm->notif_wait);
2332         if (!unified_image) {
2333                 int remaining_time = 10;
2334
2335                 ieee80211_restart_hw(mvm->hw);
2336
2337                 /* wait for restart and disconnect all interfaces */
2338                 while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2339                        remaining_time > 0) {
2340                         remaining_time--;
2341                         msleep(1000);
2342                 }
2343
2344                 if (remaining_time == 0)
2345                         IWL_ERR(mvm, "Timed out waiting for HW restart!\n");
2346         }
2347
2348         ieee80211_iterate_active_interfaces_atomic(
2349                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2350                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2351
2352         ieee80211_wake_queues(mvm->hw);
2353
2354         return 0;
2355 }
2356
2357 const struct file_operations iwl_dbgfs_d3_test_ops = {
2358         .llseek = no_llseek,
2359         .open = iwl_mvm_d3_test_open,
2360         .read = iwl_mvm_d3_test_read,
2361         .release = iwl_mvm_d3_test_release,
2362 };
2363 #endif