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         struct wowlan_key_data key_data = {
 951                 .configure_keys = !d0i3,
 952                 .use_rsc_tsc = false,
 953                 .tkip = &tkip_cmd,
 954                 .use_tkip = false,
 955         };
 956         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 957         int ret;
 958
 959         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 960         if (!key_data.rsc_tsc)
 961                 return -ENOMEM;
 962
 963         /*
 964          * if we have to configure keys, call ieee80211_iter_keys(),
 965          * as we need non-atomic context in order to take the
 966          * required locks.
 967          * for the d0i3 we can't use ieee80211_iter_keys(), as
 968          * taking (almost) any mutex might result in deadlock.
 969          */
 970         if (!d0i3) {
 971                 /*
 972                  * Note that currently we don't propagate cmd_flags
 973                  * to the iterator. In case of key_data.configure_keys,
 974                  * all the configured commands are SYNC, and
 975                  * iwl_mvm_wowlan_program_keys() will take care of
 976                  * locking/unlocking mvm->mutex.
 977                  */
 978                 ieee80211_iter_keys(mvm->hw, vif,
 979                                     iwl_mvm_wowlan_program_keys,
 980                                     &key_data);
 981         } else {
 982                 iwl_mvm_iter_d0i3_ap_keys(mvm, vif,
 983                                           iwl_mvm_wowlan_program_keys,
 984                                           &key_data);
 985         }
 986
 987         if (key_data.error) {
 988                 ret = -EIO;
 989                 goto out;
 990         }
 991
 992         if (key_data.use_rsc_tsc) {
 993                 ret = iwl_mvm_send_cmd_pdu(mvm,
 994                                            WOWLAN_TSC_RSC_PARAM, cmd_flags,
 995                                            sizeof(*key_data.rsc_tsc),
 996                                            key_data.rsc_tsc);
 997                 if (ret)
 998                         goto out;
 999         }
1000
1001         if (key_data.use_tkip &&
1002             !fw_has_api(&mvm->fw->ucode_capa,
1003                         IWL_UCODE_TLV_API_TKIP_MIC_KEYS)) {
1004                 ret = iwl_mvm_send_cmd_pdu(mvm,
1005                                            WOWLAN_TKIP_PARAM,
1006                                            cmd_flags, sizeof(tkip_cmd),
1007                                            &tkip_cmd);
1008                 if (ret)
1009                         goto out;
1010         }
1011
1012         /* configure rekey data only if offloaded rekey is supported (d3) */
1013         if (mvmvif->rekey_data.valid && !d0i3) {
1014                 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1015                 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
1016                        NL80211_KCK_LEN);
1017                 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1018                 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1019                        NL80211_KEK_LEN);
1020                 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1021                 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1022
1023                 ret = iwl_mvm_send_cmd_pdu(mvm,
1024                                            WOWLAN_KEK_KCK_MATERIAL, cmd_flags,
1025                                            sizeof(kek_kck_cmd),
1026                                            &kek_kck_cmd);
1027                 if (ret)
1028                         goto out;
1029         }
1030         ret = 0;
1031 out:
1032         kfree(key_data.rsc_tsc);
1033         return ret;
1034 }
1035
1036 static int
1037 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
1038                       struct cfg80211_wowlan *wowlan,
1039                       struct iwl_wowlan_config_cmd *wowlan_config_cmd,
1040                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
1041                       struct ieee80211_sta *ap_sta)
1042 {
1043         int ret;
1044         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1045                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1046
1047         if (!unified_image) {
1048                 ret = iwl_mvm_switch_to_d3(mvm);
1049                 if (ret)
1050                         return ret;
1051
1052                 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
1053                 if (ret)
1054                         return ret;
1055         }
1056
1057         if (!iwlwifi_mod_params.swcrypto) {
1058                 /*
1059                  * This needs to be unlocked due to lock ordering
1060                  * constraints. Since we're in the suspend path
1061                  * that isn't really a problem though.
1062                  */
1063                 mutex_unlock(&mvm->mutex);
1064                 ret = iwl_mvm_wowlan_config_key_params(mvm, vif, false,
1065                                                        CMD_ASYNC);
1066                 mutex_lock(&mvm->mutex);
1067                 if (ret)
1068                         return ret;
1069         }
1070
1071         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1072                                    sizeof(*wowlan_config_cmd),
1073                                    wowlan_config_cmd);
1074         if (ret)
1075                 return ret;
1076
1077         ret = iwl_mvm_send_patterns(mvm, wowlan);
1078         if (ret)
1079                 return ret;
1080
1081         ret = iwl_mvm_send_proto_offload(mvm, vif, false, true, 0);
1082         if (ret)
1083                 return ret;
1084
1085         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1086         return ret;
1087 }
1088
1089 static int
1090 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
1091                          struct cfg80211_wowlan *wowlan,
1092                          struct cfg80211_sched_scan_request *nd_config,
1093                          struct ieee80211_vif *vif)
1094 {
1095         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1096         int ret;
1097         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1098                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1099
1100         if (!unified_image) {
1101                 ret = iwl_mvm_switch_to_d3(mvm);
1102                 if (ret)
1103                         return ret;
1104         } else {
1105                 /* In theory, we wouldn't have to stop a running sched
1106                  * scan in order to start another one (for
1107                  * net-detect).  But in practice this doesn't seem to
1108                  * work properly, so stop any running sched_scan now.
1109                  */
1110                 ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1111                 if (ret)
1112                         return ret;
1113         }
1114
1115         /* rfkill release can be either for wowlan or netdetect */
1116         if (wowlan->rfkill_release)
1117                 wowlan_config_cmd.wakeup_filter |=
1118                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
1119
1120         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1121                                    sizeof(wowlan_config_cmd),
1122                                    &wowlan_config_cmd);
1123         if (ret)
1124                 return ret;
1125
1126         ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
1127                                        IWL_MVM_SCAN_NETDETECT);
1128         if (ret)
1129                 return ret;
1130
1131         if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
1132                 return -EBUSY;
1133
1134         /* save the sched scan matchsets... */
1135         if (nd_config->n_match_sets) {
1136                 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
1137                                              sizeof(*nd_config->match_sets) *
1138                                              nd_config->n_match_sets,
1139                                              GFP_KERNEL);
1140                 if (mvm->nd_match_sets)
1141                         mvm->n_nd_match_sets = nd_config->n_match_sets;
1142         }
1143
1144         /* ...and the sched scan channels for later reporting */
1145         mvm->nd_channels = kmemdup(nd_config->channels,
1146                                    sizeof(*nd_config->channels) *
1147                                    nd_config->n_channels,
1148                                    GFP_KERNEL);
1149         if (mvm->nd_channels)
1150                 mvm->n_nd_channels = nd_config->n_channels;
1151
1152         return 0;
1153 }
1154
1155 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
1156 {
1157         kfree(mvm->nd_match_sets);
1158         mvm->nd_match_sets = NULL;
1159         mvm->n_nd_match_sets = 0;
1160         kfree(mvm->nd_channels);
1161         mvm->nd_channels = NULL;
1162         mvm->n_nd_channels = 0;
1163 }
1164
1165 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
1166                              struct cfg80211_wowlan *wowlan,
1167                              bool test)
1168 {
1169         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1170         struct ieee80211_vif *vif = NULL;
1171         struct iwl_mvm_vif *mvmvif = NULL;
1172         struct ieee80211_sta *ap_sta = NULL;
1173         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1174                 /*
1175                  * Program the minimum sleep time to 10 seconds, as many
1176                  * platforms have issues processing a wakeup signal while
1177                  * still being in the process of suspending.
1178                  */
1179                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1180         };
1181         struct iwl_host_cmd d3_cfg_cmd = {
1182                 .id = D3_CONFIG_CMD,
1183                 .flags = CMD_WANT_SKB,
1184                 .data[0] = &d3_cfg_cmd_data,
1185                 .len[0] = sizeof(d3_cfg_cmd_data),
1186         };
1187         int ret;
1188         int len __maybe_unused;
1189         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1190                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1191
1192         if (!wowlan) {
1193                 /*
1194                  * mac80211 shouldn't get here, but for D3 test
1195                  * it doesn't warrant a warning
1196                  */
1197                 WARN_ON(!test);
1198                 return -EINVAL;
1199         }
1200
1201         mutex_lock(&mvm->mutex);
1202
1203         vif = iwl_mvm_get_bss_vif(mvm);
1204         if (IS_ERR_OR_NULL(vif)) {
1205                 ret = 1;
1206                 goto out_noreset;
1207         }
1208
1209         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1210
1211         if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA) {
1212                 /* if we're not associated, this must be netdetect */
1213                 if (!wowlan->nd_config) {
1214                         ret = 1;
1215                         goto out_noreset;
1216                 }
1217
1218                 ret = iwl_mvm_netdetect_config(
1219                         mvm, wowlan, wowlan->nd_config, vif);
1220                 if (ret)
1221                         goto out;
1222
1223                 mvm->net_detect = true;
1224         } else {
1225                 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1226
1227                 ap_sta = rcu_dereference_protected(
1228                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1229                         lockdep_is_held(&mvm->mutex));
1230                 if (IS_ERR_OR_NULL(ap_sta)) {
1231                         ret = -EINVAL;
1232                         goto out_noreset;
1233                 }
1234
1235                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1236                                                 vif, mvmvif, ap_sta);
1237                 if (ret)
1238                         goto out_noreset;
1239                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1240                                             vif, mvmvif, ap_sta);
1241                 if (ret)
1242                         goto out;
1243
1244                 mvm->net_detect = false;
1245         }
1246
1247         ret = iwl_mvm_power_update_device(mvm);
1248         if (ret)
1249                 goto out;
1250
1251         ret = iwl_mvm_power_update_mac(mvm);
1252         if (ret)
1253                 goto out;
1254
1255 #ifdef CONFIG_IWLWIFI_DEBUGFS
1256         if (mvm->d3_wake_sysassert)
1257                 d3_cfg_cmd_data.wakeup_flags |=
1258                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1259 #endif
1260
1261         /* must be last -- this switches firmware state */
1262         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1263         if (ret)
1264                 goto out;
1265 #ifdef CONFIG_IWLWIFI_DEBUGFS
1266         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1267         if (len >= sizeof(u32)) {
1268                 mvm->d3_test_pme_ptr =
1269                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1270         }
1271 #endif
1272         iwl_free_resp(&d3_cfg_cmd);
1273
1274         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1275
1276         iwl_trans_d3_suspend(mvm->trans, test, !unified_image);
1277  out:
1278         if (ret < 0) {
1279                 iwl_mvm_free_nd(mvm);
1280
1281                 if (!unified_image) {
1282                         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1283                         if (mvm->fw_restart > 0) {
1284                                 mvm->fw_restart--;
1285                                 ieee80211_restart_hw(mvm->hw);
1286                         }
1287                 }
1288         }
1289  out_noreset:
1290         mutex_unlock(&mvm->mutex);
1291
1292         return ret;
1293 }
1294
1295 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1296 {
1297         struct iwl_notification_wait wait_d3;
1298         static const u16 d3_notif[] = { D3_CONFIG_CMD };
1299         int ret;
1300
1301         iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1302                                    d3_notif, ARRAY_SIZE(d3_notif),
1303                                    NULL, NULL);
1304
1305         ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1306         if (ret)
1307                 goto remove_notif;
1308
1309         ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1310         WARN_ON_ONCE(ret);
1311         return ret;
1312
1313 remove_notif:
1314         iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1315         return ret;
1316 }
1317
1318 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1319 {
1320         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1321         struct iwl_trans *trans = mvm->trans;
1322         int ret;
1323
1324         /* make sure the d0i3 exit work is not pending */
1325         flush_work(&mvm->d0i3_exit_work);
1326
1327         ret = iwl_trans_suspend(trans);
1328         if (ret)
1329                 return ret;
1330
1331         if (wowlan->any) {
1332                 trans->system_pm_mode = IWL_PLAT_PM_MODE_D0I3;
1333
1334                 if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
1335                         ret = iwl_mvm_enter_d0i3_sync(mvm);
1336
1337                         if (ret)
1338                                 return ret;
1339                 }
1340
1341                 mutex_lock(&mvm->d0i3_suspend_mutex);
1342                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1343                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1344
1345                 iwl_trans_d3_suspend(trans, false, false);
1346
1347                 return 0;
1348         }
1349
1350         trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
1351
1352         return __iwl_mvm_suspend(hw, wowlan, false);
1353 }
1354
1355 /* converted data from the different status responses */
1356 struct iwl_wowlan_status_data {
1357         u16 pattern_number;
1358         u16 qos_seq_ctr[8];
1359         u32 wakeup_reasons;
1360         u32 wake_packet_length;
1361         u32 wake_packet_bufsize;
1362         const u8 *wake_packet;
1363 };
1364
1365 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1366                                           struct ieee80211_vif *vif,
1367                                           struct iwl_wowlan_status_data *status)
1368 {
1369         struct sk_buff *pkt = NULL;
1370         struct cfg80211_wowlan_wakeup wakeup = {
1371                 .pattern_idx = -1,
1372         };
1373         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1374         u32 reasons = status->wakeup_reasons;
1375
1376         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1377                 wakeup_report = NULL;
1378                 goto report;
1379         }
1380
1381         pm_wakeup_event(mvm->dev, 0);
1382
1383         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1384                 wakeup.magic_pkt = true;
1385
1386         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1387                 wakeup.pattern_idx =
1388                         status->pattern_number;
1389
1390         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1391                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1392                 wakeup.disconnect = true;
1393
1394         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1395                 wakeup.gtk_rekey_failure = true;
1396
1397         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1398                 wakeup.rfkill_release = true;
1399
1400         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1401                 wakeup.eap_identity_req = true;
1402
1403         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1404                 wakeup.four_way_handshake = true;
1405
1406         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1407                 wakeup.tcp_connlost = true;
1408
1409         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1410                 wakeup.tcp_nomoretokens = true;
1411
1412         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1413                 wakeup.tcp_match = true;
1414
1415         if (status->wake_packet_bufsize) {
1416                 int pktsize = status->wake_packet_bufsize;
1417                 int pktlen = status->wake_packet_length;
1418                 const u8 *pktdata = status->wake_packet;
1419                 struct ieee80211_hdr *hdr = (void *)pktdata;
1420                 int truncated = pktlen - pktsize;
1421
1422                 /* this would be a firmware bug */
1423                 if (WARN_ON_ONCE(truncated < 0))
1424                         truncated = 0;
1425
1426                 if (ieee80211_is_data(hdr->frame_control)) {
1427                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1428                         int ivlen = 0, icvlen = 4; /* also FCS */
1429
1430                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1431                         if (!pkt)
1432                                 goto report;
1433
1434                         skb_put_data(pkt, pktdata, hdrlen);
1435                         pktdata += hdrlen;
1436                         pktsize -= hdrlen;
1437
1438                         if (ieee80211_has_protected(hdr->frame_control)) {
1439                                 /*
1440                                  * This is unlocked and using gtk_i(c)vlen,
1441                                  * but since everything is under RTNL still
1442                                  * that's not really a problem - changing
1443                                  * it would be difficult.
1444                                  */
1445                                 if (is_multicast_ether_addr(hdr->addr1)) {
1446                                         ivlen = mvm->gtk_ivlen;
1447                                         icvlen += mvm->gtk_icvlen;
1448                                 } else {
1449                                         ivlen = mvm->ptk_ivlen;
1450                                         icvlen += mvm->ptk_icvlen;
1451                                 }
1452                         }
1453
1454                         /* if truncated, FCS/ICV is (partially) gone */
1455                         if (truncated >= icvlen) {
1456                                 icvlen = 0;
1457                                 truncated -= icvlen;
1458                         } else {
1459                                 icvlen -= truncated;
1460                                 truncated = 0;
1461                         }
1462
1463                         pktsize -= ivlen + icvlen;
1464                         pktdata += ivlen;
1465
1466                         skb_put_data(pkt, pktdata, pktsize);
1467
1468                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1469                                 goto report;
1470                         wakeup.packet = pkt->data;
1471                         wakeup.packet_present_len = pkt->len;
1472                         wakeup.packet_len = pkt->len - truncated;
1473                         wakeup.packet_80211 = false;
1474                 } else {
1475                         int fcslen = 4;
1476
1477                         if (truncated >= 4) {
1478                                 truncated -= 4;
1479                                 fcslen = 0;
1480                         } else {
1481                                 fcslen -= truncated;
1482                                 truncated = 0;
1483                         }
1484                         pktsize -= fcslen;
1485                         wakeup.packet = status->wake_packet;
1486                         wakeup.packet_present_len = pktsize;
1487                         wakeup.packet_len = pktlen - truncated;
1488                         wakeup.packet_80211 = true;
1489                 }
1490         }
1491
1492  report:
1493         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1494         kfree_skb(pkt);
1495 }
1496
1497 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1498                                   struct ieee80211_key_seq *seq)
1499 {
1500         u64 pn;
1501
1502         pn = le64_to_cpu(sc->pn);
1503         seq->ccmp.pn[0] = pn >> 40;
1504         seq->ccmp.pn[1] = pn >> 32;
1505         seq->ccmp.pn[2] = pn >> 24;
1506         seq->ccmp.pn[3] = pn >> 16;
1507         seq->ccmp.pn[4] = pn >> 8;
1508         seq->ccmp.pn[5] = pn;
1509 }
1510
1511 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1512                                    struct ieee80211_key_seq *seq)
1513 {
1514         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1515         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1516 }
1517
1518 static void iwl_mvm_set_aes_rx_seq(struct iwl_mvm *mvm, struct aes_sc *scs,
1519                                    struct ieee80211_sta *sta,
1520                                    struct ieee80211_key_conf *key)
1521 {
1522         int tid;
1523
1524         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1525
1526         if (sta && iwl_mvm_has_new_rx_api(mvm)) {
1527                 struct iwl_mvm_sta *mvmsta;
1528                 struct iwl_mvm_key_pn *ptk_pn;
1529
1530                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1531
1532                 ptk_pn = rcu_dereference_protected(mvmsta->ptk_pn[key->keyidx],
1533                                                    lockdep_is_held(&mvm->mutex));
1534                 if (WARN_ON(!ptk_pn))
1535                         return;
1536
1537                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1538                         struct ieee80211_key_seq seq = {};
1539                         int i;
1540
1541                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1542                         ieee80211_set_key_rx_seq(key, tid, &seq);
1543                         for (i = 1; i < mvm->trans->num_rx_queues; i++)
1544                                 memcpy(ptk_pn->q[i].pn[tid],
1545                                        seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
1546                 }
1547         } else {
1548                 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1549                         struct ieee80211_key_seq seq = {};
1550
1551                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1552                         ieee80211_set_key_rx_seq(key, tid, &seq);
1553                 }
1554         }
1555 }
1556
1557 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1558                                     struct ieee80211_key_conf *key)
1559 {
1560         int tid;
1561
1562         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1563
1564         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1565                 struct ieee80211_key_seq seq = {};
1566
1567                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1568                 ieee80211_set_key_rx_seq(key, tid, &seq);
1569         }
1570 }
1571
1572 static void iwl_mvm_set_key_rx_seq(struct iwl_mvm *mvm,
1573                                    struct ieee80211_key_conf *key,
1574                                    struct iwl_wowlan_status *status)
1575 {
1576         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1577
1578         switch (key->cipher) {
1579         case WLAN_CIPHER_SUITE_CCMP:
1580                 iwl_mvm_set_aes_rx_seq(mvm, rsc->aes.multicast_rsc, NULL, key);
1581                 break;
1582         case WLAN_CIPHER_SUITE_TKIP:
1583                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1584                 break;
1585         default:
1586                 WARN_ON(1);
1587         }
1588 }
1589
1590 struct iwl_mvm_d3_gtk_iter_data {
1591         struct iwl_mvm *mvm;
1592         struct iwl_wowlan_status *status;
1593         void *last_gtk;
1594         u32 cipher;
1595         bool find_phase, unhandled_cipher;
1596         int num_keys;
1597 };
1598
1599 static void iwl_mvm_d3_update_keys(struct ieee80211_hw *hw,
1600                                    struct ieee80211_vif *vif,
1601                                    struct ieee80211_sta *sta,
1602                                    struct ieee80211_key_conf *key,
1603                                    void *_data)
1604 {
1605         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1606
1607         if (data->unhandled_cipher)
1608                 return;
1609
1610         switch (key->cipher) {
1611         case WLAN_CIPHER_SUITE_WEP40:
1612         case WLAN_CIPHER_SUITE_WEP104:
1613                 /* ignore WEP completely, nothing to do */
1614                 return;
1615         case WLAN_CIPHER_SUITE_CCMP:
1616         case WLAN_CIPHER_SUITE_TKIP:
1617                 /* we support these */
1618                 break;
1619         default:
1620                 /* everything else (even CMAC for MFP) - disconnect from AP */
1621                 data->unhandled_cipher = true;
1622                 return;
1623         }
1624
1625         data->num_keys++;
1626
1627         /*
1628          * pairwise key - update sequence counters only;
1629          * note that this assumes no TDLS sessions are active
1630          */
1631         if (sta) {
1632                 struct ieee80211_key_seq seq = {};
1633                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1634
1635                 if (data->find_phase)
1636                         return;
1637
1638                 switch (key->cipher) {
1639                 case WLAN_CIPHER_SUITE_CCMP:
1640                         iwl_mvm_set_aes_rx_seq(data->mvm, sc->aes.unicast_rsc,
1641                                                sta, key);
1642                         atomic64_set(&key->tx_pn, le64_to_cpu(sc->aes.tsc.pn));
1643                         break;
1644                 case WLAN_CIPHER_SUITE_TKIP:
1645                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1646                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1647                         atomic64_set(&key->tx_pn,
1648                                      (u64)seq.tkip.iv16 |
1649                                      ((u64)seq.tkip.iv32 << 16));
1650                         break;
1651                 }
1652
1653                 /* that's it for this key */
1654                 return;
1655         }
1656
1657         if (data->find_phase) {
1658                 data->last_gtk = key;
1659                 data->cipher = key->cipher;
1660                 return;
1661         }
1662
1663         if (data->status->num_of_gtk_rekeys)
1664                 ieee80211_remove_key(key);
1665         else if (data->last_gtk == key)
1666                 iwl_mvm_set_key_rx_seq(data->mvm, key, data->status);
1667 }
1668
1669 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1670                                           struct ieee80211_vif *vif,
1671                                           struct iwl_wowlan_status *status)
1672 {
1673         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1674         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1675                 .mvm = mvm,
1676                 .status = status,
1677         };
1678         u32 disconnection_reasons =
1679                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1680                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1681
1682         if (!status || !vif->bss_conf.bssid)
1683                 return false;
1684
1685         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1686                 return false;
1687
1688         /* find last GTK that we used initially, if any */
1689         gtkdata.find_phase = true;
1690         ieee80211_iter_keys(mvm->hw, vif,
1691                             iwl_mvm_d3_update_keys, &gtkdata);
1692         /* not trying to keep connections with MFP/unhandled ciphers */
1693         if (gtkdata.unhandled_cipher)
1694                 return false;
1695         if (!gtkdata.num_keys)
1696                 goto out;
1697         if (!gtkdata.last_gtk)
1698                 return false;
1699
1700         /*
1701          * invalidate all other GTKs that might still exist and update
1702          * the one that we used
1703          */
1704         gtkdata.find_phase = false;
1705         ieee80211_iter_keys(mvm->hw, vif,
1706                             iwl_mvm_d3_update_keys, &gtkdata);
1707
1708         if (status->num_of_gtk_rekeys) {
1709                 struct ieee80211_key_conf *key;
1710                 struct {
1711                         struct ieee80211_key_conf conf;
1712                         u8 key[32];
1713                 } conf = {
1714                         .conf.cipher = gtkdata.cipher,
1715                         .conf.keyidx = status->gtk.key_index,
1716                 };
1717
1718                 switch (gtkdata.cipher) {
1719                 case WLAN_CIPHER_SUITE_CCMP:
1720                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1721                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1722                                WLAN_KEY_LEN_CCMP);
1723                         break;
1724                 case WLAN_CIPHER_SUITE_TKIP:
1725                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1726                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1727                         /* leave TX MIC key zeroed, we don't use it anyway */
1728                         memcpy(conf.conf.key +
1729                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1730                                status->gtk.tkip_mic_key, 8);
1731                         break;
1732                 }
1733
1734                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1735                 if (IS_ERR(key))
1736                         return false;
1737                 iwl_mvm_set_key_rx_seq(mvm, key, status);
1738         }
1739
1740         if (status->num_of_gtk_rekeys) {
1741                 __be64 replay_ctr =
1742                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1743                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1744                                            (void *)&replay_ctr, GFP_KERNEL);
1745         }
1746
1747 out:
1748         mvmvif->seqno_valid = true;
1749         /* +0x10 because the set API expects next-to-use, not last-used */
1750         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1751
1752         return true;
1753 }
1754
1755 static struct iwl_wowlan_status *
1756 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1757 {
1758         u32 base = mvm->error_event_table[0];
1759         struct error_table_start {
1760                 /* cf. struct iwl_error_event_table */
1761                 u32 valid;
1762                 u32 error_id;
1763         } err_info;
1764         struct iwl_host_cmd cmd = {
1765                 .id = WOWLAN_GET_STATUSES,
1766                 .flags = CMD_WANT_SKB,
1767         };
1768         struct iwl_wowlan_status *status, *fw_status;
1769         int ret, len, status_size;
1770
1771         iwl_trans_read_mem_bytes(mvm->trans, base,
1772                                  &err_info, sizeof(err_info));
1773
1774         if (err_info.valid) {
1775                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1776                          err_info.valid, err_info.error_id);
1777                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1778                         struct cfg80211_wowlan_wakeup wakeup = {
1779                                 .rfkill_release = true,
1780                         };
1781                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1782                                                        GFP_KERNEL);
1783                 }
1784                 return ERR_PTR(-EIO);
1785         }
1786
1787         /* only for tracing for now */
1788         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1789         if (ret)
1790                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1791
1792         ret = iwl_mvm_send_cmd(mvm, &cmd);
1793         if (ret) {
1794                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1795                 return ERR_PTR(ret);
1796         }
1797
1798         status_size = sizeof(*fw_status);
1799
1800         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1801         if (len < status_size) {
1802                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1803                 fw_status = ERR_PTR(-EIO);
1804                 goto out_free_resp;
1805         }
1806
1807         status = (void *)cmd.resp_pkt->data;
1808         if (len != (status_size +
1809                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1810                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1811                 fw_status = ERR_PTR(-EIO);
1812                 goto out_free_resp;
1813         }
1814
1815         fw_status = kmemdup(status, len, GFP_KERNEL);
1816
1817 out_free_resp:
1818         iwl_free_resp(&cmd);
1819         return fw_status;
1820 }
1821
1822 /* releases the MVM mutex */
1823 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1824                                          struct ieee80211_vif *vif)
1825 {
1826         struct iwl_wowlan_status_data status;
1827         struct iwl_wowlan_status *fw_status;
1828         int i;
1829         bool keep;
1830         struct iwl_mvm_sta *mvm_ap_sta;
1831
1832         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1833         if (IS_ERR_OR_NULL(fw_status))
1834                 goto out_unlock;
1835
1836         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1837         for (i = 0; i < 8; i++)
1838                 status.qos_seq_ctr[i] =
1839                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1840         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1841         status.wake_packet_length =
1842                 le32_to_cpu(fw_status->wake_packet_length);
1843         status.wake_packet_bufsize =
1844                 le32_to_cpu(fw_status->wake_packet_bufsize);
1845         status.wake_packet = fw_status->wake_packet;
1846
1847         /* still at hard-coded place 0 for D3 image */
1848         mvm_ap_sta = iwl_mvm_sta_from_staid_protected(mvm, 0);
1849         if (!mvm_ap_sta)
1850                 goto out_free;
1851
1852         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1853                 u16 seq = status.qos_seq_ctr[i];
1854                 /* firmware stores last-used value, we store next value */
1855                 seq += 0x10;
1856                 mvm_ap_sta->tid_data[i].seq_number = seq;
1857         }
1858
1859         /* now we have all the data we need, unlock to avoid mac80211 issues */
1860         mutex_unlock(&mvm->mutex);
1861
1862         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1863
1864         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1865
1866         kfree(fw_status);
1867         return keep;
1868
1869 out_free:
1870         kfree(fw_status);
1871 out_unlock:
1872         mutex_unlock(&mvm->mutex);
1873         return false;
1874 }
1875
1876 void iwl_mvm_d0i3_update_keys(struct iwl_mvm *mvm,
1877                               struct ieee80211_vif *vif,
1878                               struct iwl_wowlan_status *status)
1879 {
1880         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1881                 .mvm = mvm,
1882                 .status = status,
1883         };
1884
1885         /*
1886          * rekey handling requires taking locks that can't be taken now.
1887          * however, d0i3 doesn't offload rekey, so we're fine.
1888          */
1889         if (WARN_ON_ONCE(status->num_of_gtk_rekeys))
1890                 return;
1891
1892         /* find last GTK that we used initially, if any */
1893         gtkdata.find_phase = true;
1894         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1895
1896         gtkdata.find_phase = false;
1897         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1898 }
1899
1900 struct iwl_mvm_nd_query_results {
1901         u32 matched_profiles;
1902         struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1903 };
1904
1905 static int
1906 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1907                                 struct iwl_mvm_nd_query_results *results)
1908 {
1909         struct iwl_scan_offload_profiles_query *query;
1910         struct iwl_host_cmd cmd = {
1911                 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1912                 .flags = CMD_WANT_SKB,
1913         };
1914         int ret, len;
1915
1916         ret = iwl_mvm_send_cmd(mvm, &cmd);
1917         if (ret) {
1918                 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1919                 return ret;
1920         }
1921
1922         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1923         if (len < sizeof(*query)) {
1924                 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1925                 ret = -EIO;
1926                 goto out_free_resp;
1927         }
1928
1929         query = (void *)cmd.resp_pkt->data;
1930
1931         results->matched_profiles = le32_to_cpu(query->matched_profiles);
1932         memcpy(results->matches, query->matches, sizeof(results->matches));
1933
1934 #ifdef CONFIG_IWLWIFI_DEBUGFS
1935         mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1936 #endif
1937
1938 out_free_resp:
1939         iwl_free_resp(&cmd);
1940         return ret;
1941 }
1942
1943 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1944                                             struct ieee80211_vif *vif)
1945 {
1946         struct cfg80211_wowlan_nd_info *net_detect = NULL;
1947         struct cfg80211_wowlan_wakeup wakeup = {
1948                 .pattern_idx = -1,
1949         };
1950         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1951         struct iwl_mvm_nd_query_results query;
1952         struct iwl_wowlan_status *fw_status;
1953         unsigned long matched_profiles;
1954         u32 reasons = 0;
1955         int i, j, n_matches, ret;
1956
1957         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1958         if (!IS_ERR_OR_NULL(fw_status)) {
1959                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1960                 kfree(fw_status);
1961         }
1962
1963         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1964                 wakeup.rfkill_release = true;
1965
1966         if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1967                 goto out;
1968
1969         ret = iwl_mvm_netdetect_query_results(mvm, &query);
1970         if (ret || !query.matched_profiles) {
1971                 wakeup_report = NULL;
1972                 goto out;
1973         }
1974
1975         matched_profiles = query.matched_profiles;
1976         if (mvm->n_nd_match_sets) {
1977                 n_matches = hweight_long(matched_profiles);
1978         } else {
1979                 IWL_ERR(mvm, "no net detect match information available\n");
1980                 n_matches = 0;
1981         }
1982
1983         net_detect = kzalloc(sizeof(*net_detect) +
1984                              (n_matches * sizeof(net_detect->matches[0])),
1985                              GFP_KERNEL);
1986         if (!net_detect || !n_matches)
1987                 goto out_report_nd;
1988
1989         for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1990                 struct iwl_scan_offload_profile_match *fw_match;
1991                 struct cfg80211_wowlan_nd_match *match;
1992                 int idx, n_channels = 0;
1993
1994                 fw_match = &query.matches[i];
1995
1996                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1997                         n_channels += hweight8(fw_match->matching_channels[j]);
1998
1999                 match = kzalloc(sizeof(*match) +
2000                                 (n_channels * sizeof(*match->channels)),
2001                                 GFP_KERNEL);
2002                 if (!match)
2003                         goto out_report_nd;
2004
2005                 net_detect->matches[net_detect->n_matches++] = match;
2006
2007                 /* We inverted the order of the SSIDs in the scan
2008                  * request, so invert the index here.
2009                  */
2010                 idx = mvm->n_nd_match_sets - i - 1;
2011                 match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
2012                 memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
2013                        match->ssid.ssid_len);
2014
2015                 if (mvm->n_nd_channels < n_channels)
2016                         continue;
2017
2018                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
2019                         if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
2020                                 match->channels[match->n_channels++] =
2021                                         mvm->nd_channels[j]->center_freq;
2022         }
2023
2024 out_report_nd:
2025         wakeup.net_detect = net_detect;
2026 out:
2027         iwl_mvm_free_nd(mvm);
2028
2029         mutex_unlock(&mvm->mutex);
2030         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
2031
2032         if (net_detect) {
2033                 for (i = 0; i < net_detect->n_matches; i++)
2034                         kfree(net_detect->matches[i]);
2035                 kfree(net_detect);
2036         }
2037 }
2038
2039 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
2040 {
2041 #ifdef CONFIG_IWLWIFI_DEBUGFS
2042         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
2043         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
2044         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
2045
2046         if (!mvm->store_d3_resume_sram)
2047                 return;
2048
2049         if (!mvm->d3_resume_sram) {
2050                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
2051                 if (!mvm->d3_resume_sram)
2052                         return;
2053         }
2054
2055         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
2056 #endif
2057 }
2058
2059 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
2060                                        struct ieee80211_vif *vif)
2061 {
2062         /* skip the one we keep connection on */
2063         if (data == vif)
2064                 return;
2065
2066         if (vif->type == NL80211_IFTYPE_STATION)
2067                 ieee80211_resume_disconnect(vif);
2068 }
2069
2070 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
2071 {
2072         struct ieee80211_vif *vif = NULL;
2073         int ret = 1;
2074         enum iwl_d3_status d3_status;
2075         bool keep = false;
2076         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2077                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2078         bool d0i3_first = fw_has_capa(&mvm->fw->ucode_capa,
2079                                       IWL_UCODE_TLV_CAPA_D0I3_END_FIRST);
2080
2081         mutex_lock(&mvm->mutex);
2082
2083         /* get the BSS vif pointer again */
2084         vif = iwl_mvm_get_bss_vif(mvm);
2085         if (IS_ERR_OR_NULL(vif))
2086                 goto err;
2087
2088         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test, !unified_image);
2089         if (ret)
2090                 goto err;
2091
2092         if (d3_status != IWL_D3_STATUS_ALIVE) {
2093                 IWL_INFO(mvm, "Device was reset during suspend\n");
2094                 goto err;
2095         }
2096
2097         /* query SRAM first in case we want event logging */
2098         iwl_mvm_read_d3_sram(mvm);
2099
2100         if (d0i3_first) {
2101                 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, 0, 0, NULL);
2102                 if (ret < 0) {
2103                         IWL_ERR(mvm, "Failed to send D0I3_END_CMD first (%d)\n",
2104                                 ret);
2105                         goto err;
2106                 }
2107         }
2108
2109         /*
2110          * Query the current location and source from the D3 firmware so we
2111          * can play it back when we re-intiailize the D0 firmware
2112          */
2113         iwl_mvm_update_changed_regdom(mvm);
2114
2115         if (!unified_image)
2116                 /*  Re-configure default SAR profile */
2117                 iwl_mvm_sar_select_profile(mvm, 1, 1);
2118
2119         if (mvm->net_detect) {
2120                 /* If this is a non-unified image, we restart the FW,
2121                  * so no need to stop the netdetect scan.  If that
2122                  * fails, continue and try to get the wake-up reasons,
2123                  * but trigger a HW restart by keeping a failure code
2124                  * in ret.
2125                  */
2126                 if (unified_image)
2127                         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_NETDETECT,
2128                                                 false);
2129
2130                 iwl_mvm_query_netdetect_reasons(mvm, vif);
2131                 /* has unlocked the mutex, so skip that */
2132                 goto out;
2133         } else {
2134                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
2135 #ifdef CONFIG_IWLWIFI_DEBUGFS
2136                 if (keep)
2137                         mvm->keep_vif = vif;
2138 #endif
2139                 /* has unlocked the mutex, so skip that */
2140                 goto out_iterate;
2141         }
2142
2143 err:
2144         iwl_mvm_free_nd(mvm);
2145         mutex_unlock(&mvm->mutex);
2146
2147 out_iterate:
2148         if (!test)
2149                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
2150                         IEEE80211_IFACE_ITER_NORMAL,
2151                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
2152
2153 out:
2154         /* no need to reset the device in unified images, if successful */
2155         if (unified_image && !ret) {
2156                 /* nothing else to do if we already sent D0I3_END_CMD */
2157                 if (d0i3_first)
2158                         return 0;
2159
2160                 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, 0, 0, NULL);
2161                 if (!ret)
2162                         return 0;
2163         }
2164
2165         /*
2166          * Reconfigure the device in one of the following cases:
2167          * 1. We are not using a unified image
2168          * 2. We are using a unified image but had an error while exiting D3
2169          */
2170         set_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status);
2171         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
2172         /*
2173          * When switching images we return 1, which causes mac80211
2174          * to do a reconfig with IEEE80211_RECONFIG_TYPE_RESTART.
2175          * This type of reconfig calls iwl_mvm_restart_complete(),
2176          * where we unref the IWL_MVM_REF_UCODE_DOWN, so we need
2177          * to take the reference here.
2178          */
2179         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
2180
2181         return 1;
2182 }
2183
2184 static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
2185 {
2186         iwl_trans_resume(mvm->trans);
2187
2188         return __iwl_mvm_resume(mvm, false);
2189 }
2190
2191 static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
2192 {
2193         bool exit_now;
2194         enum iwl_d3_status d3_status;
2195         struct iwl_trans *trans = mvm->trans;
2196
2197         iwl_trans_d3_resume(trans, &d3_status, false, false);
2198
2199         /*
2200          * make sure to clear D0I3_DEFER_WAKEUP before
2201          * calling iwl_trans_resume(), which might wait
2202          * for d0i3 exit completion.
2203          */
2204         mutex_lock(&mvm->d0i3_suspend_mutex);
2205         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
2206         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
2207                                         &mvm->d0i3_suspend_flags);
2208         mutex_unlock(&mvm->d0i3_suspend_mutex);
2209         if (exit_now) {
2210                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
2211                 _iwl_mvm_exit_d0i3(mvm);
2212         }
2213
2214         iwl_trans_resume(trans);
2215
2216         if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
2217                 int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
2218
2219                 if (ret)
2220                         return ret;
2221                 /*
2222                  * d0i3 exit will be deferred until reconfig_complete.
2223                  * make sure there we are out of d0i3.
2224                  */
2225         }
2226         return 0;
2227 }
2228
2229 int iwl_mvm_resume(struct ieee80211_hw *hw)
2230 {
2231         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2232         int ret;
2233
2234         if (mvm->trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2235                 ret = iwl_mvm_resume_d0i3(mvm);
2236         else
2237                 ret = iwl_mvm_resume_d3(mvm);
2238
2239         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2240
2241         return ret;
2242 }
2243
2244 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2245 {
2246         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2247
2248         device_set_wakeup_enable(mvm->trans->dev, enabled);
2249 }
2250
2251 #ifdef CONFIG_IWLWIFI_DEBUGFS
2252 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2253 {
2254         struct iwl_mvm *mvm = inode->i_private;
2255         int err;
2256
2257         if (mvm->d3_test_active)
2258                 return -EBUSY;
2259
2260         file->private_data = inode->i_private;
2261
2262         ieee80211_stop_queues(mvm->hw);
2263         synchronize_net();
2264
2265         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
2266
2267         /* start pseudo D3 */
2268         rtnl_lock();
2269         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2270         rtnl_unlock();
2271         if (err > 0)
2272                 err = -EINVAL;
2273         if (err) {
2274                 ieee80211_wake_queues(mvm->hw);
2275                 return err;
2276         }
2277         mvm->d3_test_active = true;
2278         mvm->keep_vif = NULL;
2279         return 0;
2280 }
2281
2282 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2283                                     size_t count, loff_t *ppos)
2284 {
2285         struct iwl_mvm *mvm = file->private_data;
2286         u32 pme_asserted;
2287
2288         while (true) {
2289                 /* read pme_ptr if available */
2290                 if (mvm->d3_test_pme_ptr) {
2291                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
2292                                                 mvm->d3_test_pme_ptr);
2293                         if (pme_asserted)
2294                                 break;
2295                 }
2296
2297                 if (msleep_interruptible(100))
2298                         break;
2299         }
2300
2301         return 0;
2302 }
2303
2304 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2305                                               struct ieee80211_vif *vif)
2306 {
2307         /* skip the one we keep connection on */
2308         if (_data == vif)
2309                 return;
2310
2311         if (vif->type == NL80211_IFTYPE_STATION)
2312                 ieee80211_connection_loss(vif);
2313 }
2314
2315 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2316 {
2317         struct iwl_mvm *mvm = inode->i_private;
2318         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2319                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2320
2321         mvm->d3_test_active = false;
2322
2323         rtnl_lock();
2324         __iwl_mvm_resume(mvm, true);
2325         rtnl_unlock();
2326
2327         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2328
2329         iwl_abort_notification_waits(&mvm->notif_wait);
2330         if (!unified_image) {
2331                 int remaining_time = 10;
2332
2333                 ieee80211_restart_hw(mvm->hw);
2334
2335                 /* wait for restart and disconnect all interfaces */
2336                 while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2337                        remaining_time > 0) {
2338                         remaining_time--;
2339                         msleep(1000);
2340                 }
2341
2342                 if (remaining_time == 0)
2343                         IWL_ERR(mvm, "Timed out waiting for HW restart!\n");
2344         }
2345
2346         ieee80211_iterate_active_interfaces_atomic(
2347                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2348                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2349
2350         ieee80211_wake_queues(mvm->hw);
2351
2352         return 0;
2353 }
2354
2355 const struct file_operations iwl_dbgfs_d3_test_ops = {
2356         .llseek = no_llseek,
2357         .open = iwl_mvm_d3_test_open,
2358         .read = iwl_mvm_d3_test_read,
2359         .release = iwl_mvm_d3_test_release,
2360 };
2361 #endif