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   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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  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24  * USA
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  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016   Intel Deutschland GmbH
  38  * All rights reserved.
  39  *
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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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  48  *    the documentation and/or other materials provided with the
  49  *    distribution.
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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,
  59  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  60  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  61  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  62  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  64  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65  *
  66  *****************************************************************************/
  67
  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.sw_crypto)
  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
 669         /* add back the PHY */
 670         if (WARN_ON(!mvmvif->phy_ctxt))
 671                 return -EINVAL;
 672
 673         rcu_read_lock();
 674         ctx = rcu_dereference(vif->chanctx_conf);
 675         if (WARN_ON(!ctx)) {
 676                 rcu_read_unlock();
 677                 return -EINVAL;
 678         }
 679         chandef = ctx->def;
 680         chains_static = ctx->rx_chains_static;
 681         chains_dynamic = ctx->rx_chains_dynamic;
 682         rcu_read_unlock();
 683
 684         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 685                                    chains_static, chains_dynamic);
 686         if (ret)
 687                 return ret;
 688
 689         /* add back the MAC */
 690         mvmvif->uploaded = false;
 691
 692         if (WARN_ON(!vif->bss_conf.assoc))
 693                 return -EINVAL;
 694
 695         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 696         if (ret)
 697                 return ret;
 698
 699         /* add back binding - XXX refactor? */
 700         binding_cmd.id_and_color =
 701                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 702                                                 mvmvif->phy_ctxt->color));
 703         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 704         binding_cmd.phy =
 705                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 706                                                 mvmvif->phy_ctxt->color));
 707         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 708                                                               mvmvif->color));
 709         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 710                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 711
 712         status = 0;
 713         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 714                                           sizeof(binding_cmd), &binding_cmd,
 715                                           &status);
 716         if (ret) {
 717                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 718                 return ret;
 719         }
 720
 721         if (status) {
 722                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 723                 return -EIO;
 724         }
 725
 726         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false, 0);
 727         if (ret)
 728                 return ret;
 729         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 730
 731         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
 732         if (ret)
 733                 return ret;
 734
 735         /* and some quota */
 736         quota_cmd.quotas[0].id_and_color =
 737                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 738                                                 mvmvif->phy_ctxt->color));
 739         quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 740         quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 741
 742         for (i = 1; i < MAX_BINDINGS; i++)
 743                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 744
 745         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 746                                    sizeof(quota_cmd), &quota_cmd);
 747         if (ret)
 748                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 749
 750         if (iwl_mvm_is_lar_supported(mvm) && iwl_mvm_init_fw_regd(mvm))
 751                 IWL_ERR(mvm, "Failed to initialize D3 LAR information\n");
 752
 753         return 0;
 754 }
 755
 756 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 757                                        struct ieee80211_vif *vif)
 758 {
 759         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 760         struct iwl_nonqos_seq_query_cmd query_cmd = {
 761                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 762                 .mac_id_n_color =
 763                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 764                                                         mvmvif->color)),
 765         };
 766         struct iwl_host_cmd cmd = {
 767                 .id = NON_QOS_TX_COUNTER_CMD,
 768                 .flags = CMD_WANT_SKB,
 769         };
 770         int err;
 771         u32 size;
 772
 773         cmd.data[0] = &query_cmd;
 774         cmd.len[0] = sizeof(query_cmd);
 775
 776         err = iwl_mvm_send_cmd(mvm, &cmd);
 777         if (err)
 778                 return err;
 779
 780         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 781         if (size < sizeof(__le16)) {
 782                 err = -EINVAL;
 783         } else {
 784                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 785                 /* firmware returns next, not last-used seqno */
 786                 err = (u16) (err - 0x10);
 787         }
 788
 789         iwl_free_resp(&cmd);
 790         return err;
 791 }
 792
 793 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 794 {
 795         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 796         struct iwl_nonqos_seq_query_cmd query_cmd = {
 797                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 798                 .mac_id_n_color =
 799                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 800                                                         mvmvif->color)),
 801                 .value = cpu_to_le16(mvmvif->seqno),
 802         };
 803
 804         /* return if called during restart, not resume from D3 */
 805         if (!mvmvif->seqno_valid)
 806                 return;
 807
 808         mvmvif->seqno_valid = false;
 809
 810         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 811                                  sizeof(query_cmd), &query_cmd))
 812                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 813 }
 814
 815 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 816 {
 817         iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
 818
 819         iwl_mvm_stop_device(mvm);
 820         /*
 821          * Set the HW restart bit -- this is mostly true as we're
 822          * going to load new firmware and reprogram that, though
 823          * the reprogramming is going to be manual to avoid adding
 824          * all the MACs that aren't support.
 825          * We don't have to clear up everything though because the
 826          * reprogramming is manual. When we resume, we'll actually
 827          * go through a proper restart sequence again to switch
 828          * back to the runtime firmware image.
 829          */
 830         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 831
 832         /* the fw is reset, so all the keys are cleared */
 833         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 834
 835         mvm->ptk_ivlen = 0;
 836         mvm->ptk_icvlen = 0;
 837         mvm->ptk_ivlen = 0;
 838         mvm->ptk_icvlen = 0;
 839
 840         return iwl_mvm_load_d3_fw(mvm);
 841 }
 842
 843 static int
 844 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 845                           struct cfg80211_wowlan *wowlan,
 846                           struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 847                           struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 848                           struct ieee80211_sta *ap_sta)
 849 {
 850         int ret;
 851         struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 852
 853         /* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */
 854
 855         wowlan_config_cmd->is_11n_connection =
 856                                         ap_sta->ht_cap.ht_supported;
 857         wowlan_config_cmd->flags = ENABLE_L3_FILTERING |
 858                 ENABLE_NBNS_FILTERING | ENABLE_DHCP_FILTERING;
 859
 860         /* Query the last used seqno and set it */
 861         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 862         if (ret < 0)
 863                 return ret;
 864
 865         wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret);
 866
 867         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd);
 868
 869         if (wowlan->disconnect)
 870                 wowlan_config_cmd->wakeup_filter |=
 871                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 872                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 873         if (wowlan->magic_pkt)
 874                 wowlan_config_cmd->wakeup_filter |=
 875                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 876         if (wowlan->gtk_rekey_failure)
 877                 wowlan_config_cmd->wakeup_filter |=
 878                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 879         if (wowlan->eap_identity_req)
 880                 wowlan_config_cmd->wakeup_filter |=
 881                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 882         if (wowlan->four_way_handshake)
 883                 wowlan_config_cmd->wakeup_filter |=
 884                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 885         if (wowlan->n_patterns)
 886                 wowlan_config_cmd->wakeup_filter |=
 887                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 888
 889         if (wowlan->rfkill_release)
 890                 wowlan_config_cmd->wakeup_filter |=
 891                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 892
 893         if (wowlan->tcp) {
 894                 /*
 895                  * Set the "link change" (really "link lost") flag as well
 896                  * since that implies losing the TCP connection.
 897                  */
 898                 wowlan_config_cmd->wakeup_filter |=
 899                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 900                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 901                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 902                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 903         }
 904
 905         return 0;
 906 }
 907
 908 static void
 909 iwl_mvm_iter_d0i3_ap_keys(struct iwl_mvm *mvm,
 910                           struct ieee80211_vif *vif,
 911                           void (*iter)(struct ieee80211_hw *hw,
 912                                        struct ieee80211_vif *vif,
 913                                        struct ieee80211_sta *sta,
 914                                        struct ieee80211_key_conf *key,
 915                                        void *data),
 916                           void *data)
 917 {
 918         struct ieee80211_sta *ap_sta;
 919
 920         rcu_read_lock();
 921
 922         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id]);
 923         if (IS_ERR_OR_NULL(ap_sta))
 924                 goto out;
 925
 926         ieee80211_iter_keys_rcu(mvm->hw, vif, iter, data);
 927 out:
 928         rcu_read_unlock();
 929 }
 930
 931 int iwl_mvm_wowlan_config_key_params(struct iwl_mvm *mvm,
 932                                      struct ieee80211_vif *vif,
 933                                      bool d0i3,
 934                                      u32 cmd_flags)
 935 {
 936         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 937         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 938         struct wowlan_key_data key_data = {
 939                 .configure_keys = !d0i3,
 940                 .use_rsc_tsc = false,
 941                 .tkip = &tkip_cmd,
 942                 .use_tkip = false,
 943         };
 944         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 945         int ret;
 946
 947         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 948         if (!key_data.rsc_tsc)
 949                 return -ENOMEM;
 950
 951         /*
 952          * if we have to configure keys, call ieee80211_iter_keys(),
 953          * as we need non-atomic context in order to take the
 954          * required locks.
 955          * for the d0i3 we can't use ieee80211_iter_keys(), as
 956          * taking (almost) any mutex might result in deadlock.
 957          */
 958         if (!d0i3) {
 959                 /*
 960                  * Note that currently we don't propagate cmd_flags
 961                  * to the iterator. In case of key_data.configure_keys,
 962                  * all the configured commands are SYNC, and
 963                  * iwl_mvm_wowlan_program_keys() will take care of
 964                  * locking/unlocking mvm->mutex.
 965                  */
 966                 ieee80211_iter_keys(mvm->hw, vif,
 967                                     iwl_mvm_wowlan_program_keys,
 968                                     &key_data);
 969         } else {
 970                 iwl_mvm_iter_d0i3_ap_keys(mvm, vif,
 971                                           iwl_mvm_wowlan_program_keys,
 972                                           &key_data);
 973         }
 974
 975         if (key_data.error) {
 976                 ret = -EIO;
 977                 goto out;
 978         }
 979
 980         if (key_data.use_rsc_tsc) {
 981                 ret = iwl_mvm_send_cmd_pdu(mvm,
 982                                            WOWLAN_TSC_RSC_PARAM, cmd_flags,
 983                                            sizeof(*key_data.rsc_tsc),
 984                                            key_data.rsc_tsc);
 985                 if (ret)
 986                         goto out;
 987         }
 988
 989         if (key_data.use_tkip) {
 990                 ret = iwl_mvm_send_cmd_pdu(mvm,
 991                                            WOWLAN_TKIP_PARAM,
 992                                            cmd_flags, sizeof(tkip_cmd),
 993                                            &tkip_cmd);
 994                 if (ret)
 995                         goto out;
 996         }
 997
 998         /* configure rekey data only if offloaded rekey is supported (d3) */
 999         if (mvmvif->rekey_data.valid && !d0i3) {
1000                 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1001                 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
1002                        NL80211_KCK_LEN);
1003                 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1004                 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1005                        NL80211_KEK_LEN);
1006                 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1007                 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1008
1009                 ret = iwl_mvm_send_cmd_pdu(mvm,
1010                                            WOWLAN_KEK_KCK_MATERIAL, cmd_flags,
1011                                            sizeof(kek_kck_cmd),
1012                                            &kek_kck_cmd);
1013                 if (ret)
1014                         goto out;
1015         }
1016         ret = 0;
1017 out:
1018         kfree(key_data.rsc_tsc);
1019         return ret;
1020 }
1021
1022 static int
1023 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
1024                       struct cfg80211_wowlan *wowlan,
1025                       struct iwl_wowlan_config_cmd *wowlan_config_cmd,
1026                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
1027                       struct ieee80211_sta *ap_sta)
1028 {
1029         int ret;
1030         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1031                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1032
1033         if (!unified_image) {
1034                 ret = iwl_mvm_switch_to_d3(mvm);
1035                 if (ret)
1036                         return ret;
1037
1038                 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
1039                 if (ret)
1040                         return ret;
1041         }
1042
1043         if (!iwlwifi_mod_params.sw_crypto) {
1044                 /*
1045                  * This needs to be unlocked due to lock ordering
1046                  * constraints. Since we're in the suspend path
1047                  * that isn't really a problem though.
1048                  */
1049                 mutex_unlock(&mvm->mutex);
1050                 ret = iwl_mvm_wowlan_config_key_params(mvm, vif, false,
1051                                                        CMD_ASYNC);
1052                 mutex_lock(&mvm->mutex);
1053                 if (ret)
1054                         return ret;
1055         }
1056
1057         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1058                                    sizeof(*wowlan_config_cmd),
1059                                    wowlan_config_cmd);
1060         if (ret)
1061                 return ret;
1062
1063         ret = iwl_mvm_send_patterns(mvm, wowlan);
1064         if (ret)
1065                 return ret;
1066
1067         ret = iwl_mvm_send_proto_offload(mvm, vif, false, true, 0);
1068         if (ret)
1069                 return ret;
1070
1071         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1072         return ret;
1073 }
1074
1075 static int
1076 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
1077                          struct cfg80211_wowlan *wowlan,
1078                          struct cfg80211_sched_scan_request *nd_config,
1079                          struct ieee80211_vif *vif)
1080 {
1081         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1082         int ret;
1083         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1084                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1085
1086         if (!unified_image) {
1087                 ret = iwl_mvm_switch_to_d3(mvm);
1088                 if (ret)
1089                         return ret;
1090         } else {
1091                 /* In theory, we wouldn't have to stop a running sched
1092                  * scan in order to start another one (for
1093                  * net-detect).  But in practice this doesn't seem to
1094                  * work properly, so stop any running sched_scan now.
1095                  */
1096                 ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1097                 if (ret)
1098                         return ret;
1099         }
1100
1101         /* rfkill release can be either for wowlan or netdetect */
1102         if (wowlan->rfkill_release)
1103                 wowlan_config_cmd.wakeup_filter |=
1104                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
1105
1106         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1107                                    sizeof(wowlan_config_cmd),
1108                                    &wowlan_config_cmd);
1109         if (ret)
1110                 return ret;
1111
1112         ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
1113                                        IWL_MVM_SCAN_NETDETECT);
1114         if (ret)
1115                 return ret;
1116
1117         if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
1118                 return -EBUSY;
1119
1120         /* save the sched scan matchsets... */
1121         if (nd_config->n_match_sets) {
1122                 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
1123                                              sizeof(*nd_config->match_sets) *
1124                                              nd_config->n_match_sets,
1125                                              GFP_KERNEL);
1126                 if (mvm->nd_match_sets)
1127                         mvm->n_nd_match_sets = nd_config->n_match_sets;
1128         }
1129
1130         /* ...and the sched scan channels for later reporting */
1131         mvm->nd_channels = kmemdup(nd_config->channels,
1132                                    sizeof(*nd_config->channels) *
1133                                    nd_config->n_channels,
1134                                    GFP_KERNEL);
1135         if (mvm->nd_channels)
1136                 mvm->n_nd_channels = nd_config->n_channels;
1137
1138         return 0;
1139 }
1140
1141 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
1142 {
1143         kfree(mvm->nd_match_sets);
1144         mvm->nd_match_sets = NULL;
1145         mvm->n_nd_match_sets = 0;
1146         kfree(mvm->nd_channels);
1147         mvm->nd_channels = NULL;
1148         mvm->n_nd_channels = 0;
1149 }
1150
1151 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
1152                              struct cfg80211_wowlan *wowlan,
1153                              bool test)
1154 {
1155         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1156         struct ieee80211_vif *vif = NULL;
1157         struct iwl_mvm_vif *mvmvif = NULL;
1158         struct ieee80211_sta *ap_sta = NULL;
1159         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1160                 /*
1161                  * Program the minimum sleep time to 10 seconds, as many
1162                  * platforms have issues processing a wakeup signal while
1163                  * still being in the process of suspending.
1164                  */
1165                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1166         };
1167         struct iwl_host_cmd d3_cfg_cmd = {
1168                 .id = D3_CONFIG_CMD,
1169                 .flags = CMD_WANT_SKB,
1170                 .data[0] = &d3_cfg_cmd_data,
1171                 .len[0] = sizeof(d3_cfg_cmd_data),
1172         };
1173         int ret;
1174         int len __maybe_unused;
1175         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1176                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1177
1178         if (!wowlan) {
1179                 /*
1180                  * mac80211 shouldn't get here, but for D3 test
1181                  * it doesn't warrant a warning
1182                  */
1183                 WARN_ON(!test);
1184                 return -EINVAL;
1185         }
1186
1187         mutex_lock(&mvm->mutex);
1188
1189         vif = iwl_mvm_get_bss_vif(mvm);
1190         if (IS_ERR_OR_NULL(vif)) {
1191                 ret = 1;
1192                 goto out_noreset;
1193         }
1194
1195         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1196
1197         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) {
1198                 /* if we're not associated, this must be netdetect */
1199                 if (!wowlan->nd_config) {
1200                         ret = 1;
1201                         goto out_noreset;
1202                 }
1203
1204                 ret = iwl_mvm_netdetect_config(
1205                         mvm, wowlan, wowlan->nd_config, vif);
1206                 if (ret)
1207                         goto out;
1208
1209                 mvm->net_detect = true;
1210         } else {
1211                 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1212
1213                 ap_sta = rcu_dereference_protected(
1214                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1215                         lockdep_is_held(&mvm->mutex));
1216                 if (IS_ERR_OR_NULL(ap_sta)) {
1217                         ret = -EINVAL;
1218                         goto out_noreset;
1219                 }
1220
1221                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1222                                                 vif, mvmvif, ap_sta);
1223                 if (ret)
1224                         goto out_noreset;
1225                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1226                                             vif, mvmvif, ap_sta);
1227                 if (ret)
1228                         goto out;
1229
1230                 mvm->net_detect = false;
1231         }
1232
1233         ret = iwl_mvm_power_update_device(mvm);
1234         if (ret)
1235                 goto out;
1236
1237         ret = iwl_mvm_power_update_mac(mvm);
1238         if (ret)
1239                 goto out;
1240
1241 #ifdef CONFIG_IWLWIFI_DEBUGFS
1242         if (mvm->d3_wake_sysassert)
1243                 d3_cfg_cmd_data.wakeup_flags |=
1244                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1245 #endif
1246
1247         /* must be last -- this switches firmware state */
1248         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1249         if (ret)
1250                 goto out;
1251 #ifdef CONFIG_IWLWIFI_DEBUGFS
1252         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1253         if (len >= sizeof(u32)) {
1254                 mvm->d3_test_pme_ptr =
1255                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1256         }
1257 #endif
1258         iwl_free_resp(&d3_cfg_cmd);
1259
1260         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1261
1262         iwl_trans_d3_suspend(mvm->trans, test, !unified_image);
1263  out:
1264         if (ret < 0) {
1265                 iwl_mvm_free_nd(mvm);
1266
1267                 if (!unified_image) {
1268                         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1269                         if (mvm->restart_fw > 0) {
1270                                 mvm->restart_fw--;
1271                                 ieee80211_restart_hw(mvm->hw);
1272                         }
1273                 }
1274         }
1275  out_noreset:
1276         mutex_unlock(&mvm->mutex);
1277
1278         return ret;
1279 }
1280
1281 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1282 {
1283         struct iwl_notification_wait wait_d3;
1284         static const u16 d3_notif[] = { D3_CONFIG_CMD };
1285         int ret;
1286
1287         iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1288                                    d3_notif, ARRAY_SIZE(d3_notif),
1289                                    NULL, NULL);
1290
1291         ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1292         if (ret)
1293                 goto remove_notif;
1294
1295         ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1296         WARN_ON_ONCE(ret);
1297         return ret;
1298
1299 remove_notif:
1300         iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1301         return ret;
1302 }
1303
1304 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1305 {
1306         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1307         struct iwl_trans *trans = mvm->trans;
1308         int ret;
1309
1310         /* make sure the d0i3 exit work is not pending */
1311         flush_work(&mvm->d0i3_exit_work);
1312
1313         ret = iwl_trans_suspend(trans);
1314         if (ret)
1315                 return ret;
1316
1317         if (wowlan->any) {
1318                 trans->system_pm_mode = IWL_PLAT_PM_MODE_D0I3;
1319
1320                 if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
1321                         ret = iwl_mvm_enter_d0i3_sync(mvm);
1322
1323                         if (ret)
1324                                 return ret;
1325                 }
1326
1327                 mutex_lock(&mvm->d0i3_suspend_mutex);
1328                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1329                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1330
1331                 iwl_trans_d3_suspend(trans, false, false);
1332
1333                 return 0;
1334         }
1335
1336         trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
1337
1338         return __iwl_mvm_suspend(hw, wowlan, false);
1339 }
1340
1341 /* converted data from the different status responses */
1342 struct iwl_wowlan_status_data {
1343         u16 pattern_number;
1344         u16 qos_seq_ctr[8];
1345         u32 wakeup_reasons;
1346         u32 wake_packet_length;
1347         u32 wake_packet_bufsize;
1348         const u8 *wake_packet;
1349 };
1350
1351 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1352                                           struct ieee80211_vif *vif,
1353                                           struct iwl_wowlan_status_data *status)
1354 {
1355         struct sk_buff *pkt = NULL;
1356         struct cfg80211_wowlan_wakeup wakeup = {
1357                 .pattern_idx = -1,
1358         };
1359         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1360         u32 reasons = status->wakeup_reasons;
1361
1362         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1363                 wakeup_report = NULL;
1364                 goto report;
1365         }
1366
1367         pm_wakeup_event(mvm->dev, 0);
1368
1369         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1370                 wakeup.magic_pkt = true;
1371
1372         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1373                 wakeup.pattern_idx =
1374                         status->pattern_number;
1375
1376         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1377                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1378                 wakeup.disconnect = true;
1379
1380         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1381                 wakeup.gtk_rekey_failure = true;
1382
1383         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1384                 wakeup.rfkill_release = true;
1385
1386         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1387                 wakeup.eap_identity_req = true;
1388
1389         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1390                 wakeup.four_way_handshake = true;
1391
1392         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1393                 wakeup.tcp_connlost = true;
1394
1395         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1396                 wakeup.tcp_nomoretokens = true;
1397
1398         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1399                 wakeup.tcp_match = true;
1400
1401         if (status->wake_packet_bufsize) {
1402                 int pktsize = status->wake_packet_bufsize;
1403                 int pktlen = status->wake_packet_length;
1404                 const u8 *pktdata = status->wake_packet;
1405                 struct ieee80211_hdr *hdr = (void *)pktdata;
1406                 int truncated = pktlen - pktsize;
1407
1408                 /* this would be a firmware bug */
1409                 if (WARN_ON_ONCE(truncated < 0))
1410                         truncated = 0;
1411
1412                 if (ieee80211_is_data(hdr->frame_control)) {
1413                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1414                         int ivlen = 0, icvlen = 4; /* also FCS */
1415
1416                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1417                         if (!pkt)
1418                                 goto report;
1419
1420                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1421                         pktdata += hdrlen;
1422                         pktsize -= hdrlen;
1423
1424                         if (ieee80211_has_protected(hdr->frame_control)) {
1425                                 /*
1426                                  * This is unlocked and using gtk_i(c)vlen,
1427                                  * but since everything is under RTNL still
1428                                  * that's not really a problem - changing
1429                                  * it would be difficult.
1430                                  */
1431                                 if (is_multicast_ether_addr(hdr->addr1)) {
1432                                         ivlen = mvm->gtk_ivlen;
1433                                         icvlen += mvm->gtk_icvlen;
1434                                 } else {
1435                                         ivlen = mvm->ptk_ivlen;
1436                                         icvlen += mvm->ptk_icvlen;
1437                                 }
1438                         }
1439
1440                         /* if truncated, FCS/ICV is (partially) gone */
1441                         if (truncated >= icvlen) {
1442                                 icvlen = 0;
1443                                 truncated -= icvlen;
1444                         } else {
1445                                 icvlen -= truncated;
1446                                 truncated = 0;
1447                         }
1448
1449                         pktsize -= ivlen + icvlen;
1450                         pktdata += ivlen;
1451
1452                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1453
1454                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1455                                 goto report;
1456                         wakeup.packet = pkt->data;
1457                         wakeup.packet_present_len = pkt->len;
1458                         wakeup.packet_len = pkt->len - truncated;
1459                         wakeup.packet_80211 = false;
1460                 } else {
1461                         int fcslen = 4;
1462
1463                         if (truncated >= 4) {
1464                                 truncated -= 4;
1465                                 fcslen = 0;
1466                         } else {
1467                                 fcslen -= truncated;
1468                                 truncated = 0;
1469                         }
1470                         pktsize -= fcslen;
1471                         wakeup.packet = status->wake_packet;
1472                         wakeup.packet_present_len = pktsize;
1473                         wakeup.packet_len = pktlen - truncated;
1474                         wakeup.packet_80211 = true;
1475                 }
1476         }
1477
1478  report:
1479         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1480         kfree_skb(pkt);
1481 }
1482
1483 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1484                                   struct ieee80211_key_seq *seq)
1485 {
1486         u64 pn;
1487
1488         pn = le64_to_cpu(sc->pn);
1489         seq->ccmp.pn[0] = pn >> 40;
1490         seq->ccmp.pn[1] = pn >> 32;
1491         seq->ccmp.pn[2] = pn >> 24;
1492         seq->ccmp.pn[3] = pn >> 16;
1493         seq->ccmp.pn[4] = pn >> 8;
1494         seq->ccmp.pn[5] = pn;
1495 }
1496
1497 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1498                                    struct ieee80211_key_seq *seq)
1499 {
1500         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1501         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1502 }
1503
1504 static void iwl_mvm_set_aes_rx_seq(struct iwl_mvm *mvm, struct aes_sc *scs,
1505                                    struct ieee80211_sta *sta,
1506                                    struct ieee80211_key_conf *key)
1507 {
1508         int tid;
1509
1510         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1511
1512         if (sta && iwl_mvm_has_new_rx_api(mvm)) {
1513                 struct iwl_mvm_sta *mvmsta;
1514                 struct iwl_mvm_key_pn *ptk_pn;
1515
1516                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1517
1518                 ptk_pn = rcu_dereference_protected(mvmsta->ptk_pn[key->keyidx],
1519                                                    lockdep_is_held(&mvm->mutex));
1520                 if (WARN_ON(!ptk_pn))
1521                         return;
1522
1523                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1524                         struct ieee80211_key_seq seq = {};
1525                         int i;
1526
1527                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1528                         ieee80211_set_key_rx_seq(key, tid, &seq);
1529                         for (i = 1; i < mvm->trans->num_rx_queues; i++)
1530                                 memcpy(ptk_pn->q[i].pn[tid],
1531                                        seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
1532                 }
1533         } else {
1534                 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1535                         struct ieee80211_key_seq seq = {};
1536
1537                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1538                         ieee80211_set_key_rx_seq(key, tid, &seq);
1539                 }
1540         }
1541 }
1542
1543 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1544                                     struct ieee80211_key_conf *key)
1545 {
1546         int tid;
1547
1548         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1549
1550         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1551                 struct ieee80211_key_seq seq = {};
1552
1553                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1554                 ieee80211_set_key_rx_seq(key, tid, &seq);
1555         }
1556 }
1557
1558 static void iwl_mvm_set_key_rx_seq(struct iwl_mvm *mvm,
1559                                    struct ieee80211_key_conf *key,
1560                                    struct iwl_wowlan_status *status)
1561 {
1562         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1563
1564         switch (key->cipher) {
1565         case WLAN_CIPHER_SUITE_CCMP:
1566                 iwl_mvm_set_aes_rx_seq(mvm, rsc->aes.multicast_rsc, NULL, key);
1567                 break;
1568         case WLAN_CIPHER_SUITE_TKIP:
1569                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1570                 break;
1571         default:
1572                 WARN_ON(1);
1573         }
1574 }
1575
1576 struct iwl_mvm_d3_gtk_iter_data {
1577         struct iwl_mvm *mvm;
1578         struct iwl_wowlan_status *status;
1579         void *last_gtk;
1580         u32 cipher;
1581         bool find_phase, unhandled_cipher;
1582         int num_keys;
1583 };
1584
1585 static void iwl_mvm_d3_update_keys(struct ieee80211_hw *hw,
1586                                    struct ieee80211_vif *vif,
1587                                    struct ieee80211_sta *sta,
1588                                    struct ieee80211_key_conf *key,
1589                                    void *_data)
1590 {
1591         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1592
1593         if (data->unhandled_cipher)
1594                 return;
1595
1596         switch (key->cipher) {
1597         case WLAN_CIPHER_SUITE_WEP40:
1598         case WLAN_CIPHER_SUITE_WEP104:
1599                 /* ignore WEP completely, nothing to do */
1600                 return;
1601         case WLAN_CIPHER_SUITE_CCMP:
1602         case WLAN_CIPHER_SUITE_TKIP:
1603                 /* we support these */
1604                 break;
1605         default:
1606                 /* everything else (even CMAC for MFP) - disconnect from AP */
1607                 data->unhandled_cipher = true;
1608                 return;
1609         }
1610
1611         data->num_keys++;
1612
1613         /*
1614          * pairwise key - update sequence counters only;
1615          * note that this assumes no TDLS sessions are active
1616          */
1617         if (sta) {
1618                 struct ieee80211_key_seq seq = {};
1619                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1620
1621                 if (data->find_phase)
1622                         return;
1623
1624                 switch (key->cipher) {
1625                 case WLAN_CIPHER_SUITE_CCMP:
1626                         iwl_mvm_set_aes_rx_seq(data->mvm, sc->aes.unicast_rsc,
1627                                                sta, key);
1628                         atomic64_set(&key->tx_pn, le64_to_cpu(sc->aes.tsc.pn));
1629                         break;
1630                 case WLAN_CIPHER_SUITE_TKIP:
1631                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1632                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1633                         atomic64_set(&key->tx_pn,
1634                                      (u64)seq.tkip.iv16 |
1635                                      ((u64)seq.tkip.iv32 << 16));
1636                         break;
1637                 }
1638
1639                 /* that's it for this key */
1640                 return;
1641         }
1642
1643         if (data->find_phase) {
1644                 data->last_gtk = key;
1645                 data->cipher = key->cipher;
1646                 return;
1647         }
1648
1649         if (data->status->num_of_gtk_rekeys)
1650                 ieee80211_remove_key(key);
1651         else if (data->last_gtk == key)
1652                 iwl_mvm_set_key_rx_seq(data->mvm, key, data->status);
1653 }
1654
1655 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1656                                           struct ieee80211_vif *vif,
1657                                           struct iwl_wowlan_status *status)
1658 {
1659         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1660         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1661                 .mvm = mvm,
1662                 .status = status,
1663         };
1664         u32 disconnection_reasons =
1665                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1666                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1667
1668         if (!status || !vif->bss_conf.bssid)
1669                 return false;
1670
1671         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1672                 return false;
1673
1674         /* find last GTK that we used initially, if any */
1675         gtkdata.find_phase = true;
1676         ieee80211_iter_keys(mvm->hw, vif,
1677                             iwl_mvm_d3_update_keys, &gtkdata);
1678         /* not trying to keep connections with MFP/unhandled ciphers */
1679         if (gtkdata.unhandled_cipher)
1680                 return false;
1681         if (!gtkdata.num_keys)
1682                 goto out;
1683         if (!gtkdata.last_gtk)
1684                 return false;
1685
1686         /*
1687          * invalidate all other GTKs that might still exist and update
1688          * the one that we used
1689          */
1690         gtkdata.find_phase = false;
1691         ieee80211_iter_keys(mvm->hw, vif,
1692                             iwl_mvm_d3_update_keys, &gtkdata);
1693
1694         if (status->num_of_gtk_rekeys) {
1695                 struct ieee80211_key_conf *key;
1696                 struct {
1697                         struct ieee80211_key_conf conf;
1698                         u8 key[32];
1699                 } conf = {
1700                         .conf.cipher = gtkdata.cipher,
1701                         .conf.keyidx = status->gtk.key_index,
1702                 };
1703
1704                 switch (gtkdata.cipher) {
1705                 case WLAN_CIPHER_SUITE_CCMP:
1706                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1707                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1708                                WLAN_KEY_LEN_CCMP);
1709                         break;
1710                 case WLAN_CIPHER_SUITE_TKIP:
1711                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1712                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1713                         /* leave TX MIC key zeroed, we don't use it anyway */
1714                         memcpy(conf.conf.key +
1715                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1716                                status->gtk.tkip_mic_key, 8);
1717                         break;
1718                 }
1719
1720                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1721                 if (IS_ERR(key))
1722                         return false;
1723                 iwl_mvm_set_key_rx_seq(mvm, key, status);
1724         }
1725
1726         if (status->num_of_gtk_rekeys) {
1727                 __be64 replay_ctr =
1728                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1729                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1730                                            (void *)&replay_ctr, GFP_KERNEL);
1731         }
1732
1733 out:
1734         mvmvif->seqno_valid = true;
1735         /* +0x10 because the set API expects next-to-use, not last-used */
1736         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1737
1738         return true;
1739 }
1740
1741 static struct iwl_wowlan_status *
1742 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1743 {
1744         u32 base = mvm->error_event_table;
1745         struct error_table_start {
1746                 /* cf. struct iwl_error_event_table */
1747                 u32 valid;
1748                 u32 error_id;
1749         } err_info;
1750         struct iwl_host_cmd cmd = {
1751                 .id = WOWLAN_GET_STATUSES,
1752                 .flags = CMD_WANT_SKB,
1753         };
1754         struct iwl_wowlan_status *status, *fw_status;
1755         int ret, len, status_size;
1756
1757         iwl_trans_read_mem_bytes(mvm->trans, base,
1758                                  &err_info, sizeof(err_info));
1759
1760         if (err_info.valid) {
1761                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1762                          err_info.valid, err_info.error_id);
1763                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1764                         struct cfg80211_wowlan_wakeup wakeup = {
1765                                 .rfkill_release = true,
1766                         };
1767                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1768                                                        GFP_KERNEL);
1769                 }
1770                 return ERR_PTR(-EIO);
1771         }
1772
1773         /* only for tracing for now */
1774         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1775         if (ret)
1776                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1777
1778         ret = iwl_mvm_send_cmd(mvm, &cmd);
1779         if (ret) {
1780                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1781                 return ERR_PTR(ret);
1782         }
1783
1784         /* RF-kill already asserted again... */
1785         if (!cmd.resp_pkt) {
1786                 fw_status = ERR_PTR(-ERFKILL);
1787                 goto out_free_resp;
1788         }
1789
1790         status_size = sizeof(*fw_status);
1791
1792         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1793         if (len < status_size) {
1794                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1795                 fw_status = ERR_PTR(-EIO);
1796                 goto out_free_resp;
1797         }
1798
1799         status = (void *)cmd.resp_pkt->data;
1800         if (len != (status_size +
1801                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1802                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1803                 fw_status = ERR_PTR(-EIO);
1804                 goto out_free_resp;
1805         }
1806
1807         fw_status = kmemdup(status, len, GFP_KERNEL);
1808
1809 out_free_resp:
1810         iwl_free_resp(&cmd);
1811         return fw_status;
1812 }
1813
1814 /* releases the MVM mutex */
1815 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1816                                          struct ieee80211_vif *vif)
1817 {
1818         struct iwl_wowlan_status_data status;
1819         struct iwl_wowlan_status *fw_status;
1820         int i;
1821         bool keep;
1822         struct iwl_mvm_sta *mvm_ap_sta;
1823
1824         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1825         if (IS_ERR_OR_NULL(fw_status))
1826                 goto out_unlock;
1827
1828         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1829         for (i = 0; i < 8; i++)
1830                 status.qos_seq_ctr[i] =
1831                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1832         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1833         status.wake_packet_length =
1834                 le32_to_cpu(fw_status->wake_packet_length);
1835         status.wake_packet_bufsize =
1836                 le32_to_cpu(fw_status->wake_packet_bufsize);
1837         status.wake_packet = fw_status->wake_packet;
1838
1839         /* still at hard-coded place 0 for D3 image */
1840         mvm_ap_sta = iwl_mvm_sta_from_staid_protected(mvm, 0);
1841         if (!mvm_ap_sta)
1842                 goto out_free;
1843
1844         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1845                 u16 seq = status.qos_seq_ctr[i];
1846                 /* firmware stores last-used value, we store next value */
1847                 seq += 0x10;
1848                 mvm_ap_sta->tid_data[i].seq_number = seq;
1849         }
1850
1851         /* now we have all the data we need, unlock to avoid mac80211 issues */
1852         mutex_unlock(&mvm->mutex);
1853
1854         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1855
1856         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1857
1858         kfree(fw_status);
1859         return keep;
1860
1861 out_free:
1862         kfree(fw_status);
1863 out_unlock:
1864         mutex_unlock(&mvm->mutex);
1865         return false;
1866 }
1867
1868 void iwl_mvm_d0i3_update_keys(struct iwl_mvm *mvm,
1869                               struct ieee80211_vif *vif,
1870                               struct iwl_wowlan_status *status)
1871 {
1872         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1873                 .mvm = mvm,
1874                 .status = status,
1875         };
1876
1877         /*
1878          * rekey handling requires taking locks that can't be taken now.
1879          * however, d0i3 doesn't offload rekey, so we're fine.
1880          */
1881         if (WARN_ON_ONCE(status->num_of_gtk_rekeys))
1882                 return;
1883
1884         /* find last GTK that we used initially, if any */
1885         gtkdata.find_phase = true;
1886         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1887
1888         gtkdata.find_phase = false;
1889         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1890 }
1891
1892 struct iwl_mvm_nd_query_results {
1893         u32 matched_profiles;
1894         struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1895 };
1896
1897 static int
1898 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1899                                 struct iwl_mvm_nd_query_results *results)
1900 {
1901         struct iwl_scan_offload_profiles_query *query;
1902         struct iwl_host_cmd cmd = {
1903                 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1904                 .flags = CMD_WANT_SKB,
1905         };
1906         int ret, len;
1907
1908         ret = iwl_mvm_send_cmd(mvm, &cmd);
1909         if (ret) {
1910                 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1911                 return ret;
1912         }
1913
1914         /* RF-kill already asserted again... */
1915         if (!cmd.resp_pkt) {
1916                 ret = -ERFKILL;
1917                 goto out_free_resp;
1918         }
1919
1920         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1921         if (len < sizeof(*query)) {
1922                 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1923                 ret = -EIO;
1924                 goto out_free_resp;
1925         }
1926
1927         query = (void *)cmd.resp_pkt->data;
1928
1929         results->matched_profiles = le32_to_cpu(query->matched_profiles);
1930         memcpy(results->matches, query->matches, sizeof(results->matches));
1931
1932 #ifdef CONFIG_IWLWIFI_DEBUGFS
1933         mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1934 #endif
1935
1936 out_free_resp:
1937         iwl_free_resp(&cmd);
1938         return ret;
1939 }
1940
1941 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1942                                             struct ieee80211_vif *vif)
1943 {
1944         struct cfg80211_wowlan_nd_info *net_detect = NULL;
1945         struct cfg80211_wowlan_wakeup wakeup = {
1946                 .pattern_idx = -1,
1947         };
1948         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1949         struct iwl_mvm_nd_query_results query;
1950         struct iwl_wowlan_status *fw_status;
1951         unsigned long matched_profiles;
1952         u32 reasons = 0;
1953         int i, j, n_matches, ret;
1954
1955         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1956         if (!IS_ERR_OR_NULL(fw_status)) {
1957                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1958                 kfree(fw_status);
1959         }
1960
1961         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1962                 wakeup.rfkill_release = true;
1963
1964         if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1965                 goto out;
1966
1967         ret = iwl_mvm_netdetect_query_results(mvm, &query);
1968         if (ret || !query.matched_profiles) {
1969                 wakeup_report = NULL;
1970                 goto out;
1971         }
1972
1973         matched_profiles = query.matched_profiles;
1974         if (mvm->n_nd_match_sets) {
1975                 n_matches = hweight_long(matched_profiles);
1976         } else {
1977                 IWL_ERR(mvm, "no net detect match information available\n");
1978                 n_matches = 0;
1979         }
1980
1981         net_detect = kzalloc(sizeof(*net_detect) +
1982                              (n_matches * sizeof(net_detect->matches[0])),
1983                              GFP_KERNEL);
1984         if (!net_detect || !n_matches)
1985                 goto out_report_nd;
1986
1987         for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1988                 struct iwl_scan_offload_profile_match *fw_match;
1989                 struct cfg80211_wowlan_nd_match *match;
1990                 int idx, n_channels = 0;
1991
1992                 fw_match = &query.matches[i];
1993
1994                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1995                         n_channels += hweight8(fw_match->matching_channels[j]);
1996
1997                 match = kzalloc(sizeof(*match) +
1998                                 (n_channels * sizeof(*match->channels)),
1999                                 GFP_KERNEL);
2000                 if (!match)
2001                         goto out_report_nd;
2002
2003                 net_detect->matches[net_detect->n_matches++] = match;
2004
2005                 /* We inverted the order of the SSIDs in the scan
2006                  * request, so invert the index here.
2007                  */
2008                 idx = mvm->n_nd_match_sets - i - 1;
2009                 match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
2010                 memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
2011                        match->ssid.ssid_len);
2012
2013                 if (mvm->n_nd_channels < n_channels)
2014                         continue;
2015
2016                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
2017                         if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
2018                                 match->channels[match->n_channels++] =
2019                                         mvm->nd_channels[j]->center_freq;
2020         }
2021
2022 out_report_nd:
2023         wakeup.net_detect = net_detect;
2024 out:
2025         iwl_mvm_free_nd(mvm);
2026
2027         mutex_unlock(&mvm->mutex);
2028         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
2029
2030         if (net_detect) {
2031                 for (i = 0; i < net_detect->n_matches; i++)
2032                         kfree(net_detect->matches[i]);
2033                 kfree(net_detect);
2034         }
2035 }
2036
2037 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
2038 {
2039 #ifdef CONFIG_IWLWIFI_DEBUGFS
2040         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
2041         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
2042         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
2043
2044         if (!mvm->store_d3_resume_sram)
2045                 return;
2046
2047         if (!mvm->d3_resume_sram) {
2048                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
2049                 if (!mvm->d3_resume_sram)
2050                         return;
2051         }
2052
2053         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
2054 #endif
2055 }
2056
2057 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
2058                                        struct ieee80211_vif *vif)
2059 {
2060         /* skip the one we keep connection on */
2061         if (data == vif)
2062                 return;
2063
2064         if (vif->type == NL80211_IFTYPE_STATION)
2065                 ieee80211_resume_disconnect(vif);
2066 }
2067
2068 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
2069 {
2070         struct ieee80211_vif *vif = NULL;
2071         int ret = 1;
2072         enum iwl_d3_status d3_status;
2073         bool keep = false;
2074         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2075                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2076
2077         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
2078                                     CMD_WAKE_UP_TRANS;
2079
2080         mutex_lock(&mvm->mutex);
2081
2082         /* get the BSS vif pointer again */
2083         vif = iwl_mvm_get_bss_vif(mvm);
2084         if (IS_ERR_OR_NULL(vif))
2085                 goto err;
2086
2087         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test, !unified_image);
2088         if (ret)
2089                 goto err;
2090
2091         if (d3_status != IWL_D3_STATUS_ALIVE) {
2092                 IWL_INFO(mvm, "Device was reset during suspend\n");
2093                 goto err;
2094         }
2095
2096         /* query SRAM first in case we want event logging */
2097         iwl_mvm_read_d3_sram(mvm);
2098
2099         /*
2100          * Query the current location and source from the D3 firmware so we
2101          * can play it back when we re-intiailize the D0 firmware
2102          */
2103         iwl_mvm_update_changed_regdom(mvm);
2104
2105         if (mvm->net_detect) {
2106                 /* If this is a non-unified image, we restart the FW,
2107                  * so no need to stop the netdetect scan.  If that
2108                  * fails, continue and try to get the wake-up reasons,
2109                  * but trigger a HW restart by keeping a failure code
2110                  * in ret.
2111                  */
2112                 if (unified_image)
2113                         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_NETDETECT,
2114                                                 false);
2115
2116                 iwl_mvm_query_netdetect_reasons(mvm, vif);
2117                 /* has unlocked the mutex, so skip that */
2118                 goto out;
2119         } else {
2120                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
2121 #ifdef CONFIG_IWLWIFI_DEBUGFS
2122                 if (keep)
2123                         mvm->keep_vif = vif;
2124 #endif
2125                 /* has unlocked the mutex, so skip that */
2126                 goto out_iterate;
2127         }
2128
2129 err:
2130         iwl_mvm_free_nd(mvm);
2131         mutex_unlock(&mvm->mutex);
2132
2133 out_iterate:
2134         if (!test)
2135                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
2136                         IEEE80211_IFACE_ITER_NORMAL,
2137                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
2138
2139 out:
2140         if (unified_image && !ret) {
2141                 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
2142                 if (!ret) /* D3 ended successfully - no need to reset device */
2143                         return 0;
2144         }
2145
2146         /*
2147          * Reconfigure the device in one of the following cases:
2148          * 1. We are not using a unified image
2149          * 2. We are using a unified image but had an error while exiting D3
2150          */
2151         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
2152         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
2153         /*
2154          * When switching images we return 1, which causes mac80211
2155          * to do a reconfig with IEEE80211_RECONFIG_TYPE_RESTART.
2156          * This type of reconfig calls iwl_mvm_restart_complete(),
2157          * where we unref the IWL_MVM_REF_UCODE_DOWN, so we need
2158          * to take the reference here.
2159          */
2160         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
2161
2162         return 1;
2163 }
2164
2165 static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
2166 {
2167         iwl_trans_resume(mvm->trans);
2168
2169         return __iwl_mvm_resume(mvm, false);
2170 }
2171
2172 static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
2173 {
2174         bool exit_now;
2175         enum iwl_d3_status d3_status;
2176         struct iwl_trans *trans = mvm->trans;
2177
2178         iwl_trans_d3_resume(trans, &d3_status, false, false);
2179
2180         /*
2181          * make sure to clear D0I3_DEFER_WAKEUP before
2182          * calling iwl_trans_resume(), which might wait
2183          * for d0i3 exit completion.
2184          */
2185         mutex_lock(&mvm->d0i3_suspend_mutex);
2186         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
2187         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
2188                                         &mvm->d0i3_suspend_flags);
2189         mutex_unlock(&mvm->d0i3_suspend_mutex);
2190         if (exit_now) {
2191                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
2192                 _iwl_mvm_exit_d0i3(mvm);
2193         }
2194
2195         iwl_trans_resume(trans);
2196
2197         if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
2198                 int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
2199
2200                 if (ret)
2201                         return ret;
2202                 /*
2203                  * d0i3 exit will be deferred until reconfig_complete.
2204                  * make sure there we are out of d0i3.
2205                  */
2206         }
2207         return 0;
2208 }
2209
2210 int iwl_mvm_resume(struct ieee80211_hw *hw)
2211 {
2212         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2213         int ret;
2214
2215         if (mvm->trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2216                 ret = iwl_mvm_resume_d0i3(mvm);
2217         else
2218                 ret = iwl_mvm_resume_d3(mvm);
2219
2220         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2221
2222         return ret;
2223 }
2224
2225 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2226 {
2227         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2228
2229         device_set_wakeup_enable(mvm->trans->dev, enabled);
2230 }
2231
2232 #ifdef CONFIG_IWLWIFI_DEBUGFS
2233 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2234 {
2235         struct iwl_mvm *mvm = inode->i_private;
2236         int err;
2237
2238         if (mvm->d3_test_active)
2239                 return -EBUSY;
2240
2241         file->private_data = inode->i_private;
2242
2243         ieee80211_stop_queues(mvm->hw);
2244         synchronize_net();
2245
2246         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
2247
2248         /* start pseudo D3 */
2249         rtnl_lock();
2250         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2251         rtnl_unlock();
2252         if (err > 0)
2253                 err = -EINVAL;
2254         if (err) {
2255                 ieee80211_wake_queues(mvm->hw);
2256                 return err;
2257         }
2258         mvm->d3_test_active = true;
2259         mvm->keep_vif = NULL;
2260         return 0;
2261 }
2262
2263 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2264                                     size_t count, loff_t *ppos)
2265 {
2266         struct iwl_mvm *mvm = file->private_data;
2267         u32 pme_asserted;
2268
2269         while (true) {
2270                 /* read pme_ptr if available */
2271                 if (mvm->d3_test_pme_ptr) {
2272                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
2273                                                 mvm->d3_test_pme_ptr);
2274                         if (pme_asserted)
2275                                 break;
2276                 }
2277
2278                 if (msleep_interruptible(100))
2279                         break;
2280         }
2281
2282         return 0;
2283 }
2284
2285 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2286                                               struct ieee80211_vif *vif)
2287 {
2288         /* skip the one we keep connection on */
2289         if (_data == vif)
2290                 return;
2291
2292         if (vif->type == NL80211_IFTYPE_STATION)
2293                 ieee80211_connection_loss(vif);
2294 }
2295
2296 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2297 {
2298         struct iwl_mvm *mvm = inode->i_private;
2299         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2300                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2301
2302         mvm->d3_test_active = false;
2303
2304         rtnl_lock();
2305         __iwl_mvm_resume(mvm, true);
2306         rtnl_unlock();
2307
2308         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2309
2310         iwl_abort_notification_waits(&mvm->notif_wait);
2311         if (!unified_image) {
2312                 int remaining_time = 10;
2313
2314                 ieee80211_restart_hw(mvm->hw);
2315
2316                 /* wait for restart and disconnect all interfaces */
2317                 while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2318                        remaining_time > 0) {
2319                         remaining_time--;
2320                         msleep(1000);
2321                 }
2322
2323                 if (remaining_time == 0)
2324                         IWL_ERR(mvm, "Timed out waiting for HW restart!\n");
2325         }
2326
2327         ieee80211_iterate_active_interfaces_atomic(
2328                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2329                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2330
2331         ieee80211_wake_queues(mvm->hw);
2332
2333         return 0;
2334 }
2335
2336 const struct file_operations iwl_dbgfs_d3_test_ops = {
2337         .llseek = no_llseek,
2338         .open = iwl_mvm_d3_test_open,
2339         .read = iwl_mvm_d3_test_read,
2340         .release = iwl_mvm_d3_test_release,
2341 };
2342 #endif