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         bool unified = fw_has_capa(&mvm->fw->ucode_capa,
 939                                    IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
 940         struct wowlan_key_data key_data = {
 941                 .configure_keys = !d0i3 && !unified,
 942                 .use_rsc_tsc = false,
 943                 .tkip = &tkip_cmd,
 944                 .use_tkip = false,
 945         };
 946         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 947         int ret;
 948
 949         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 950         if (!key_data.rsc_tsc)
 951                 return -ENOMEM;
 952
 953         /*
 954          * if we have to configure keys, call ieee80211_iter_keys(),
 955          * as we need non-atomic context in order to take the
 956          * required locks.
 957          * for the d0i3 we can't use ieee80211_iter_keys(), as
 958          * taking (almost) any mutex might result in deadlock.
 959          */
 960         if (!d0i3) {
 961                 /*
 962                  * Note that currently we don't propagate cmd_flags
 963                  * to the iterator. In case of key_data.configure_keys,
 964                  * all the configured commands are SYNC, and
 965                  * iwl_mvm_wowlan_program_keys() will take care of
 966                  * locking/unlocking mvm->mutex.
 967                  */
 968                 ieee80211_iter_keys(mvm->hw, vif,
 969                                     iwl_mvm_wowlan_program_keys,
 970                                     &key_data);
 971         } else {
 972                 iwl_mvm_iter_d0i3_ap_keys(mvm, vif,
 973                                           iwl_mvm_wowlan_program_keys,
 974                                           &key_data);
 975         }
 976
 977         if (key_data.error) {
 978                 ret = -EIO;
 979                 goto out;
 980         }
 981
 982         if (key_data.use_rsc_tsc) {
 983                 ret = iwl_mvm_send_cmd_pdu(mvm,
 984                                            WOWLAN_TSC_RSC_PARAM, cmd_flags,
 985                                            sizeof(*key_data.rsc_tsc),
 986                                            key_data.rsc_tsc);
 987                 if (ret)
 988                         goto out;
 989         }
 990
 991         if (key_data.use_tkip) {
 992                 ret = iwl_mvm_send_cmd_pdu(mvm,
 993                                            WOWLAN_TKIP_PARAM,
 994                                            cmd_flags, sizeof(tkip_cmd),
 995                                            &tkip_cmd);
 996                 if (ret)
 997                         goto out;
 998         }
 999
1000         /* configure rekey data only if offloaded rekey is supported (d3) */
1001         if (mvmvif->rekey_data.valid && !d0i3) {
1002                 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1003                 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
1004                        NL80211_KCK_LEN);
1005                 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1006                 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1007                        NL80211_KEK_LEN);
1008                 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1009                 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1010
1011                 ret = iwl_mvm_send_cmd_pdu(mvm,
1012                                            WOWLAN_KEK_KCK_MATERIAL, cmd_flags,
1013                                            sizeof(kek_kck_cmd),
1014                                            &kek_kck_cmd);
1015                 if (ret)
1016                         goto out;
1017         }
1018         ret = 0;
1019 out:
1020         kfree(key_data.rsc_tsc);
1021         return ret;
1022 }
1023
1024 static int
1025 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
1026                       struct cfg80211_wowlan *wowlan,
1027                       struct iwl_wowlan_config_cmd *wowlan_config_cmd,
1028                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
1029                       struct ieee80211_sta *ap_sta)
1030 {
1031         int ret;
1032         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1033                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1034
1035         if (!unified_image) {
1036                 ret = iwl_mvm_switch_to_d3(mvm);
1037                 if (ret)
1038                         return ret;
1039
1040                 ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
1041                 if (ret)
1042                         return ret;
1043         }
1044
1045         if (!iwlwifi_mod_params.sw_crypto) {
1046                 /*
1047                  * This needs to be unlocked due to lock ordering
1048                  * constraints. Since we're in the suspend path
1049                  * that isn't really a problem though.
1050                  */
1051                 mutex_unlock(&mvm->mutex);
1052                 ret = iwl_mvm_wowlan_config_key_params(mvm, vif, false,
1053                                                        CMD_ASYNC);
1054                 mutex_lock(&mvm->mutex);
1055                 if (ret)
1056                         return ret;
1057         }
1058
1059         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1060                                    sizeof(*wowlan_config_cmd),
1061                                    wowlan_config_cmd);
1062         if (ret)
1063                 return ret;
1064
1065         ret = iwl_mvm_send_patterns(mvm, wowlan);
1066         if (ret)
1067                 return ret;
1068
1069         ret = iwl_mvm_send_proto_offload(mvm, vif, false, true, 0);
1070         if (ret)
1071                 return ret;
1072
1073         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1074         return ret;
1075 }
1076
1077 static int
1078 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
1079                          struct cfg80211_wowlan *wowlan,
1080                          struct cfg80211_sched_scan_request *nd_config,
1081                          struct ieee80211_vif *vif)
1082 {
1083         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1084         int ret;
1085         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1086                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1087
1088         if (!unified_image) {
1089                 ret = iwl_mvm_switch_to_d3(mvm);
1090                 if (ret)
1091                         return ret;
1092         } else {
1093                 /* In theory, we wouldn't have to stop a running sched
1094                  * scan in order to start another one (for
1095                  * net-detect).  But in practice this doesn't seem to
1096                  * work properly, so stop any running sched_scan now.
1097                  */
1098                 ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1099                 if (ret)
1100                         return ret;
1101         }
1102
1103         /* rfkill release can be either for wowlan or netdetect */
1104         if (wowlan->rfkill_release)
1105                 wowlan_config_cmd.wakeup_filter |=
1106                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
1107
1108         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1109                                    sizeof(wowlan_config_cmd),
1110                                    &wowlan_config_cmd);
1111         if (ret)
1112                 return ret;
1113
1114         ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
1115                                        IWL_MVM_SCAN_NETDETECT);
1116         if (ret)
1117                 return ret;
1118
1119         if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
1120                 return -EBUSY;
1121
1122         /* save the sched scan matchsets... */
1123         if (nd_config->n_match_sets) {
1124                 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
1125                                              sizeof(*nd_config->match_sets) *
1126                                              nd_config->n_match_sets,
1127                                              GFP_KERNEL);
1128                 if (mvm->nd_match_sets)
1129                         mvm->n_nd_match_sets = nd_config->n_match_sets;
1130         }
1131
1132         /* ...and the sched scan channels for later reporting */
1133         mvm->nd_channels = kmemdup(nd_config->channels,
1134                                    sizeof(*nd_config->channels) *
1135                                    nd_config->n_channels,
1136                                    GFP_KERNEL);
1137         if (mvm->nd_channels)
1138                 mvm->n_nd_channels = nd_config->n_channels;
1139
1140         return 0;
1141 }
1142
1143 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
1144 {
1145         kfree(mvm->nd_match_sets);
1146         mvm->nd_match_sets = NULL;
1147         mvm->n_nd_match_sets = 0;
1148         kfree(mvm->nd_channels);
1149         mvm->nd_channels = NULL;
1150         mvm->n_nd_channels = 0;
1151 }
1152
1153 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
1154                              struct cfg80211_wowlan *wowlan,
1155                              bool test)
1156 {
1157         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1158         struct ieee80211_vif *vif = NULL;
1159         struct iwl_mvm_vif *mvmvif = NULL;
1160         struct ieee80211_sta *ap_sta = NULL;
1161         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1162                 /*
1163                  * Program the minimum sleep time to 10 seconds, as many
1164                  * platforms have issues processing a wakeup signal while
1165                  * still being in the process of suspending.
1166                  */
1167                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1168         };
1169         struct iwl_host_cmd d3_cfg_cmd = {
1170                 .id = D3_CONFIG_CMD,
1171                 .flags = CMD_WANT_SKB,
1172                 .data[0] = &d3_cfg_cmd_data,
1173                 .len[0] = sizeof(d3_cfg_cmd_data),
1174         };
1175         int ret;
1176         int len __maybe_unused;
1177         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1178                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1179
1180         if (!wowlan) {
1181                 /*
1182                  * mac80211 shouldn't get here, but for D3 test
1183                  * it doesn't warrant a warning
1184                  */
1185                 WARN_ON(!test);
1186                 return -EINVAL;
1187         }
1188
1189         mutex_lock(&mvm->mutex);
1190
1191         vif = iwl_mvm_get_bss_vif(mvm);
1192         if (IS_ERR_OR_NULL(vif)) {
1193                 ret = 1;
1194                 goto out_noreset;
1195         }
1196
1197         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1198
1199         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) {
1200                 /* if we're not associated, this must be netdetect */
1201                 if (!wowlan->nd_config) {
1202                         ret = 1;
1203                         goto out_noreset;
1204                 }
1205
1206                 ret = iwl_mvm_netdetect_config(
1207                         mvm, wowlan, wowlan->nd_config, vif);
1208                 if (ret)
1209                         goto out;
1210
1211                 mvm->net_detect = true;
1212         } else {
1213                 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1214
1215                 ap_sta = rcu_dereference_protected(
1216                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1217                         lockdep_is_held(&mvm->mutex));
1218                 if (IS_ERR_OR_NULL(ap_sta)) {
1219                         ret = -EINVAL;
1220                         goto out_noreset;
1221                 }
1222
1223                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1224                                                 vif, mvmvif, ap_sta);
1225                 if (ret)
1226                         goto out_noreset;
1227                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1228                                             vif, mvmvif, ap_sta);
1229                 if (ret)
1230                         goto out;
1231
1232                 mvm->net_detect = false;
1233         }
1234
1235         ret = iwl_mvm_power_update_device(mvm);
1236         if (ret)
1237                 goto out;
1238
1239         ret = iwl_mvm_power_update_mac(mvm);
1240         if (ret)
1241                 goto out;
1242
1243 #ifdef CONFIG_IWLWIFI_DEBUGFS
1244         if (mvm->d3_wake_sysassert)
1245                 d3_cfg_cmd_data.wakeup_flags |=
1246                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1247 #endif
1248
1249         /* must be last -- this switches firmware state */
1250         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1251         if (ret)
1252                 goto out;
1253 #ifdef CONFIG_IWLWIFI_DEBUGFS
1254         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1255         if (len >= sizeof(u32)) {
1256                 mvm->d3_test_pme_ptr =
1257                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1258         }
1259 #endif
1260         iwl_free_resp(&d3_cfg_cmd);
1261
1262         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1263
1264         iwl_trans_d3_suspend(mvm->trans, test, !unified_image);
1265  out:
1266         if (ret < 0) {
1267                 iwl_mvm_free_nd(mvm);
1268
1269                 if (!unified_image) {
1270                         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1271                         if (mvm->restart_fw > 0) {
1272                                 mvm->restart_fw--;
1273                                 ieee80211_restart_hw(mvm->hw);
1274                         }
1275                 }
1276         }
1277  out_noreset:
1278         mutex_unlock(&mvm->mutex);
1279
1280         return ret;
1281 }
1282
1283 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1284 {
1285         struct iwl_notification_wait wait_d3;
1286         static const u16 d3_notif[] = { D3_CONFIG_CMD };
1287         int ret;
1288
1289         iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1290                                    d3_notif, ARRAY_SIZE(d3_notif),
1291                                    NULL, NULL);
1292
1293         ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1294         if (ret)
1295                 goto remove_notif;
1296
1297         ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1298         WARN_ON_ONCE(ret);
1299         return ret;
1300
1301 remove_notif:
1302         iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1303         return ret;
1304 }
1305
1306 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1307 {
1308         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1309         struct iwl_trans *trans = mvm->trans;
1310         int ret;
1311
1312         /* make sure the d0i3 exit work is not pending */
1313         flush_work(&mvm->d0i3_exit_work);
1314
1315         ret = iwl_trans_suspend(trans);
1316         if (ret)
1317                 return ret;
1318
1319         if (wowlan->any) {
1320                 trans->system_pm_mode = IWL_PLAT_PM_MODE_D0I3;
1321
1322                 if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
1323                         ret = iwl_mvm_enter_d0i3_sync(mvm);
1324
1325                         if (ret)
1326                                 return ret;
1327                 }
1328
1329                 mutex_lock(&mvm->d0i3_suspend_mutex);
1330                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1331                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1332
1333                 iwl_trans_d3_suspend(trans, false, false);
1334
1335                 return 0;
1336         }
1337
1338         trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
1339
1340         return __iwl_mvm_suspend(hw, wowlan, false);
1341 }
1342
1343 /* converted data from the different status responses */
1344 struct iwl_wowlan_status_data {
1345         u16 pattern_number;
1346         u16 qos_seq_ctr[8];
1347         u32 wakeup_reasons;
1348         u32 wake_packet_length;
1349         u32 wake_packet_bufsize;
1350         const u8 *wake_packet;
1351 };
1352
1353 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1354                                           struct ieee80211_vif *vif,
1355                                           struct iwl_wowlan_status_data *status)
1356 {
1357         struct sk_buff *pkt = NULL;
1358         struct cfg80211_wowlan_wakeup wakeup = {
1359                 .pattern_idx = -1,
1360         };
1361         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1362         u32 reasons = status->wakeup_reasons;
1363
1364         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1365                 wakeup_report = NULL;
1366                 goto report;
1367         }
1368
1369         pm_wakeup_event(mvm->dev, 0);
1370
1371         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1372                 wakeup.magic_pkt = true;
1373
1374         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1375                 wakeup.pattern_idx =
1376                         status->pattern_number;
1377
1378         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1379                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1380                 wakeup.disconnect = true;
1381
1382         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1383                 wakeup.gtk_rekey_failure = true;
1384
1385         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1386                 wakeup.rfkill_release = true;
1387
1388         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1389                 wakeup.eap_identity_req = true;
1390
1391         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1392                 wakeup.four_way_handshake = true;
1393
1394         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1395                 wakeup.tcp_connlost = true;
1396
1397         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1398                 wakeup.tcp_nomoretokens = true;
1399
1400         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1401                 wakeup.tcp_match = true;
1402
1403         if (status->wake_packet_bufsize) {
1404                 int pktsize = status->wake_packet_bufsize;
1405                 int pktlen = status->wake_packet_length;
1406                 const u8 *pktdata = status->wake_packet;
1407                 struct ieee80211_hdr *hdr = (void *)pktdata;
1408                 int truncated = pktlen - pktsize;
1409
1410                 /* this would be a firmware bug */
1411                 if (WARN_ON_ONCE(truncated < 0))
1412                         truncated = 0;
1413
1414                 if (ieee80211_is_data(hdr->frame_control)) {
1415                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1416                         int ivlen = 0, icvlen = 4; /* also FCS */
1417
1418                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1419                         if (!pkt)
1420                                 goto report;
1421
1422                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1423                         pktdata += hdrlen;
1424                         pktsize -= hdrlen;
1425
1426                         if (ieee80211_has_protected(hdr->frame_control)) {
1427                                 /*
1428                                  * This is unlocked and using gtk_i(c)vlen,
1429                                  * but since everything is under RTNL still
1430                                  * that's not really a problem - changing
1431                                  * it would be difficult.
1432                                  */
1433                                 if (is_multicast_ether_addr(hdr->addr1)) {
1434                                         ivlen = mvm->gtk_ivlen;
1435                                         icvlen += mvm->gtk_icvlen;
1436                                 } else {
1437                                         ivlen = mvm->ptk_ivlen;
1438                                         icvlen += mvm->ptk_icvlen;
1439                                 }
1440                         }
1441
1442                         /* if truncated, FCS/ICV is (partially) gone */
1443                         if (truncated >= icvlen) {
1444                                 icvlen = 0;
1445                                 truncated -= icvlen;
1446                         } else {
1447                                 icvlen -= truncated;
1448                                 truncated = 0;
1449                         }
1450
1451                         pktsize -= ivlen + icvlen;
1452                         pktdata += ivlen;
1453
1454                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1455
1456                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1457                                 goto report;
1458                         wakeup.packet = pkt->data;
1459                         wakeup.packet_present_len = pkt->len;
1460                         wakeup.packet_len = pkt->len - truncated;
1461                         wakeup.packet_80211 = false;
1462                 } else {
1463                         int fcslen = 4;
1464
1465                         if (truncated >= 4) {
1466                                 truncated -= 4;
1467                                 fcslen = 0;
1468                         } else {
1469                                 fcslen -= truncated;
1470                                 truncated = 0;
1471                         }
1472                         pktsize -= fcslen;
1473                         wakeup.packet = status->wake_packet;
1474                         wakeup.packet_present_len = pktsize;
1475                         wakeup.packet_len = pktlen - truncated;
1476                         wakeup.packet_80211 = true;
1477                 }
1478         }
1479
1480  report:
1481         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1482         kfree_skb(pkt);
1483 }
1484
1485 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1486                                   struct ieee80211_key_seq *seq)
1487 {
1488         u64 pn;
1489
1490         pn = le64_to_cpu(sc->pn);
1491         seq->ccmp.pn[0] = pn >> 40;
1492         seq->ccmp.pn[1] = pn >> 32;
1493         seq->ccmp.pn[2] = pn >> 24;
1494         seq->ccmp.pn[3] = pn >> 16;
1495         seq->ccmp.pn[4] = pn >> 8;
1496         seq->ccmp.pn[5] = pn;
1497 }
1498
1499 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1500                                    struct ieee80211_key_seq *seq)
1501 {
1502         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1503         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1504 }
1505
1506 static void iwl_mvm_set_aes_rx_seq(struct iwl_mvm *mvm, struct aes_sc *scs,
1507                                    struct ieee80211_sta *sta,
1508                                    struct ieee80211_key_conf *key)
1509 {
1510         int tid;
1511
1512         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1513
1514         if (sta && iwl_mvm_has_new_rx_api(mvm)) {
1515                 struct iwl_mvm_sta *mvmsta;
1516                 struct iwl_mvm_key_pn *ptk_pn;
1517
1518                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1519
1520                 ptk_pn = rcu_dereference_protected(mvmsta->ptk_pn[key->keyidx],
1521                                                    lockdep_is_held(&mvm->mutex));
1522                 if (WARN_ON(!ptk_pn))
1523                         return;
1524
1525                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1526                         struct ieee80211_key_seq seq = {};
1527                         int i;
1528
1529                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1530                         ieee80211_set_key_rx_seq(key, tid, &seq);
1531                         for (i = 1; i < mvm->trans->num_rx_queues; i++)
1532                                 memcpy(ptk_pn->q[i].pn[tid],
1533                                        seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
1534                 }
1535         } else {
1536                 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1537                         struct ieee80211_key_seq seq = {};
1538
1539                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1540                         ieee80211_set_key_rx_seq(key, tid, &seq);
1541                 }
1542         }
1543 }
1544
1545 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1546                                     struct ieee80211_key_conf *key)
1547 {
1548         int tid;
1549
1550         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1551
1552         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1553                 struct ieee80211_key_seq seq = {};
1554
1555                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1556                 ieee80211_set_key_rx_seq(key, tid, &seq);
1557         }
1558 }
1559
1560 static void iwl_mvm_set_key_rx_seq(struct iwl_mvm *mvm,
1561                                    struct ieee80211_key_conf *key,
1562                                    struct iwl_wowlan_status *status)
1563 {
1564         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1565
1566         switch (key->cipher) {
1567         case WLAN_CIPHER_SUITE_CCMP:
1568                 iwl_mvm_set_aes_rx_seq(mvm, rsc->aes.multicast_rsc, NULL, key);
1569                 break;
1570         case WLAN_CIPHER_SUITE_TKIP:
1571                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1572                 break;
1573         default:
1574                 WARN_ON(1);
1575         }
1576 }
1577
1578 struct iwl_mvm_d3_gtk_iter_data {
1579         struct iwl_mvm *mvm;
1580         struct iwl_wowlan_status *status;
1581         void *last_gtk;
1582         u32 cipher;
1583         bool find_phase, unhandled_cipher;
1584         int num_keys;
1585 };
1586
1587 static void iwl_mvm_d3_update_keys(struct ieee80211_hw *hw,
1588                                    struct ieee80211_vif *vif,
1589                                    struct ieee80211_sta *sta,
1590                                    struct ieee80211_key_conf *key,
1591                                    void *_data)
1592 {
1593         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1594
1595         if (data->unhandled_cipher)
1596                 return;
1597
1598         switch (key->cipher) {
1599         case WLAN_CIPHER_SUITE_WEP40:
1600         case WLAN_CIPHER_SUITE_WEP104:
1601                 /* ignore WEP completely, nothing to do */
1602                 return;
1603         case WLAN_CIPHER_SUITE_CCMP:
1604         case WLAN_CIPHER_SUITE_TKIP:
1605                 /* we support these */
1606                 break;
1607         default:
1608                 /* everything else (even CMAC for MFP) - disconnect from AP */
1609                 data->unhandled_cipher = true;
1610                 return;
1611         }
1612
1613         data->num_keys++;
1614
1615         /*
1616          * pairwise key - update sequence counters only;
1617          * note that this assumes no TDLS sessions are active
1618          */
1619         if (sta) {
1620                 struct ieee80211_key_seq seq = {};
1621                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1622
1623                 if (data->find_phase)
1624                         return;
1625
1626                 switch (key->cipher) {
1627                 case WLAN_CIPHER_SUITE_CCMP:
1628                         iwl_mvm_set_aes_rx_seq(data->mvm, sc->aes.unicast_rsc,
1629                                                sta, key);
1630                         atomic64_set(&key->tx_pn, le64_to_cpu(sc->aes.tsc.pn));
1631                         break;
1632                 case WLAN_CIPHER_SUITE_TKIP:
1633                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1634                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1635                         atomic64_set(&key->tx_pn,
1636                                      (u64)seq.tkip.iv16 |
1637                                      ((u64)seq.tkip.iv32 << 16));
1638                         break;
1639                 }
1640
1641                 /* that's it for this key */
1642                 return;
1643         }
1644
1645         if (data->find_phase) {
1646                 data->last_gtk = key;
1647                 data->cipher = key->cipher;
1648                 return;
1649         }
1650
1651         if (data->status->num_of_gtk_rekeys)
1652                 ieee80211_remove_key(key);
1653         else if (data->last_gtk == key)
1654                 iwl_mvm_set_key_rx_seq(data->mvm, key, data->status);
1655 }
1656
1657 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1658                                           struct ieee80211_vif *vif,
1659                                           struct iwl_wowlan_status *status)
1660 {
1661         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1662         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1663                 .mvm = mvm,
1664                 .status = status,
1665         };
1666         u32 disconnection_reasons =
1667                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1668                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1669
1670         if (!status || !vif->bss_conf.bssid)
1671                 return false;
1672
1673         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1674                 return false;
1675
1676         /* find last GTK that we used initially, if any */
1677         gtkdata.find_phase = true;
1678         ieee80211_iter_keys(mvm->hw, vif,
1679                             iwl_mvm_d3_update_keys, &gtkdata);
1680         /* not trying to keep connections with MFP/unhandled ciphers */
1681         if (gtkdata.unhandled_cipher)
1682                 return false;
1683         if (!gtkdata.num_keys)
1684                 goto out;
1685         if (!gtkdata.last_gtk)
1686                 return false;
1687
1688         /*
1689          * invalidate all other GTKs that might still exist and update
1690          * the one that we used
1691          */
1692         gtkdata.find_phase = false;
1693         ieee80211_iter_keys(mvm->hw, vif,
1694                             iwl_mvm_d3_update_keys, &gtkdata);
1695
1696         if (status->num_of_gtk_rekeys) {
1697                 struct ieee80211_key_conf *key;
1698                 struct {
1699                         struct ieee80211_key_conf conf;
1700                         u8 key[32];
1701                 } conf = {
1702                         .conf.cipher = gtkdata.cipher,
1703                         .conf.keyidx = status->gtk.key_index,
1704                 };
1705
1706                 switch (gtkdata.cipher) {
1707                 case WLAN_CIPHER_SUITE_CCMP:
1708                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1709                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1710                                WLAN_KEY_LEN_CCMP);
1711                         break;
1712                 case WLAN_CIPHER_SUITE_TKIP:
1713                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1714                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1715                         /* leave TX MIC key zeroed, we don't use it anyway */
1716                         memcpy(conf.conf.key +
1717                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1718                                status->gtk.tkip_mic_key, 8);
1719                         break;
1720                 }
1721
1722                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1723                 if (IS_ERR(key))
1724                         return false;
1725                 iwl_mvm_set_key_rx_seq(mvm, key, status);
1726         }
1727
1728         if (status->num_of_gtk_rekeys) {
1729                 __be64 replay_ctr =
1730                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1731                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1732                                            (void *)&replay_ctr, GFP_KERNEL);
1733         }
1734
1735 out:
1736         mvmvif->seqno_valid = true;
1737         /* +0x10 because the set API expects next-to-use, not last-used */
1738         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1739
1740         return true;
1741 }
1742
1743 static struct iwl_wowlan_status *
1744 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1745 {
1746         u32 base = mvm->error_event_table;
1747         struct error_table_start {
1748                 /* cf. struct iwl_error_event_table */
1749                 u32 valid;
1750                 u32 error_id;
1751         } err_info;
1752         struct iwl_host_cmd cmd = {
1753                 .id = WOWLAN_GET_STATUSES,
1754                 .flags = CMD_WANT_SKB,
1755         };
1756         struct iwl_wowlan_status *status, *fw_status;
1757         int ret, len, status_size;
1758
1759         iwl_trans_read_mem_bytes(mvm->trans, base,
1760                                  &err_info, sizeof(err_info));
1761
1762         if (err_info.valid) {
1763                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1764                          err_info.valid, err_info.error_id);
1765                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1766                         struct cfg80211_wowlan_wakeup wakeup = {
1767                                 .rfkill_release = true,
1768                         };
1769                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1770                                                        GFP_KERNEL);
1771                 }
1772                 return ERR_PTR(-EIO);
1773         }
1774
1775         /* only for tracing for now */
1776         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1777         if (ret)
1778                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1779
1780         ret = iwl_mvm_send_cmd(mvm, &cmd);
1781         if (ret) {
1782                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1783                 return ERR_PTR(ret);
1784         }
1785
1786         /* RF-kill already asserted again... */
1787         if (!cmd.resp_pkt) {
1788                 fw_status = ERR_PTR(-ERFKILL);
1789                 goto out_free_resp;
1790         }
1791
1792         status_size = sizeof(*fw_status);
1793
1794         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1795         if (len < status_size) {
1796                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1797                 fw_status = ERR_PTR(-EIO);
1798                 goto out_free_resp;
1799         }
1800
1801         status = (void *)cmd.resp_pkt->data;
1802         if (len != (status_size +
1803                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1804                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1805                 fw_status = ERR_PTR(-EIO);
1806                 goto out_free_resp;
1807         }
1808
1809         fw_status = kmemdup(status, len, GFP_KERNEL);
1810
1811 out_free_resp:
1812         iwl_free_resp(&cmd);
1813         return fw_status;
1814 }
1815
1816 /* releases the MVM mutex */
1817 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1818                                          struct ieee80211_vif *vif)
1819 {
1820         struct iwl_wowlan_status_data status;
1821         struct iwl_wowlan_status *fw_status;
1822         int i;
1823         bool keep;
1824         struct iwl_mvm_sta *mvm_ap_sta;
1825
1826         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1827         if (IS_ERR_OR_NULL(fw_status))
1828                 goto out_unlock;
1829
1830         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1831         for (i = 0; i < 8; i++)
1832                 status.qos_seq_ctr[i] =
1833                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1834         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1835         status.wake_packet_length =
1836                 le32_to_cpu(fw_status->wake_packet_length);
1837         status.wake_packet_bufsize =
1838                 le32_to_cpu(fw_status->wake_packet_bufsize);
1839         status.wake_packet = fw_status->wake_packet;
1840
1841         /* still at hard-coded place 0 for D3 image */
1842         mvm_ap_sta = iwl_mvm_sta_from_staid_protected(mvm, 0);
1843         if (!mvm_ap_sta)
1844                 goto out_free;
1845
1846         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1847                 u16 seq = status.qos_seq_ctr[i];
1848                 /* firmware stores last-used value, we store next value */
1849                 seq += 0x10;
1850                 mvm_ap_sta->tid_data[i].seq_number = seq;
1851         }
1852
1853         /* now we have all the data we need, unlock to avoid mac80211 issues */
1854         mutex_unlock(&mvm->mutex);
1855
1856         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1857
1858         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1859
1860         kfree(fw_status);
1861         return keep;
1862
1863 out_free:
1864         kfree(fw_status);
1865 out_unlock:
1866         mutex_unlock(&mvm->mutex);
1867         return false;
1868 }
1869
1870 void iwl_mvm_d0i3_update_keys(struct iwl_mvm *mvm,
1871                               struct ieee80211_vif *vif,
1872                               struct iwl_wowlan_status *status)
1873 {
1874         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1875                 .mvm = mvm,
1876                 .status = status,
1877         };
1878
1879         /*
1880          * rekey handling requires taking locks that can't be taken now.
1881          * however, d0i3 doesn't offload rekey, so we're fine.
1882          */
1883         if (WARN_ON_ONCE(status->num_of_gtk_rekeys))
1884                 return;
1885
1886         /* find last GTK that we used initially, if any */
1887         gtkdata.find_phase = true;
1888         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1889
1890         gtkdata.find_phase = false;
1891         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1892 }
1893
1894 struct iwl_mvm_nd_query_results {
1895         u32 matched_profiles;
1896         struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1897 };
1898
1899 static int
1900 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1901                                 struct iwl_mvm_nd_query_results *results)
1902 {
1903         struct iwl_scan_offload_profiles_query *query;
1904         struct iwl_host_cmd cmd = {
1905                 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1906                 .flags = CMD_WANT_SKB,
1907         };
1908         int ret, len;
1909
1910         ret = iwl_mvm_send_cmd(mvm, &cmd);
1911         if (ret) {
1912                 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1913                 return ret;
1914         }
1915
1916         /* RF-kill already asserted again... */
1917         if (!cmd.resp_pkt) {
1918                 ret = -ERFKILL;
1919                 goto out_free_resp;
1920         }
1921
1922         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1923         if (len < sizeof(*query)) {
1924                 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1925                 ret = -EIO;
1926                 goto out_free_resp;
1927         }
1928
1929         query = (void *)cmd.resp_pkt->data;
1930
1931         results->matched_profiles = le32_to_cpu(query->matched_profiles);
1932         memcpy(results->matches, query->matches, sizeof(results->matches));
1933
1934 #ifdef CONFIG_IWLWIFI_DEBUGFS
1935         mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1936 #endif
1937
1938 out_free_resp:
1939         iwl_free_resp(&cmd);
1940         return ret;
1941 }
1942
1943 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1944                                             struct ieee80211_vif *vif)
1945 {
1946         struct cfg80211_wowlan_nd_info *net_detect = NULL;
1947         struct cfg80211_wowlan_wakeup wakeup = {
1948                 .pattern_idx = -1,
1949         };
1950         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1951         struct iwl_mvm_nd_query_results query;
1952         struct iwl_wowlan_status *fw_status;
1953         unsigned long matched_profiles;
1954         u32 reasons = 0;
1955         int i, j, n_matches, ret;
1956
1957         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1958         if (!IS_ERR_OR_NULL(fw_status)) {
1959                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1960                 kfree(fw_status);
1961         }
1962
1963         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1964                 wakeup.rfkill_release = true;
1965
1966         if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1967                 goto out;
1968
1969         ret = iwl_mvm_netdetect_query_results(mvm, &query);
1970         if (ret || !query.matched_profiles) {
1971                 wakeup_report = NULL;
1972                 goto out;
1973         }
1974
1975         matched_profiles = query.matched_profiles;
1976         if (mvm->n_nd_match_sets) {
1977                 n_matches = hweight_long(matched_profiles);
1978         } else {
1979                 IWL_ERR(mvm, "no net detect match information available\n");
1980                 n_matches = 0;
1981         }
1982
1983         net_detect = kzalloc(sizeof(*net_detect) +
1984                              (n_matches * sizeof(net_detect->matches[0])),
1985                              GFP_KERNEL);
1986         if (!net_detect || !n_matches)
1987                 goto out_report_nd;
1988
1989         for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1990                 struct iwl_scan_offload_profile_match *fw_match;
1991                 struct cfg80211_wowlan_nd_match *match;
1992                 int idx, n_channels = 0;
1993
1994                 fw_match = &query.matches[i];
1995
1996                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1997                         n_channels += hweight8(fw_match->matching_channels[j]);
1998
1999                 match = kzalloc(sizeof(*match) +
2000                                 (n_channels * sizeof(*match->channels)),
2001                                 GFP_KERNEL);
2002                 if (!match)
2003                         goto out_report_nd;
2004
2005                 net_detect->matches[net_detect->n_matches++] = match;
2006
2007                 /* We inverted the order of the SSIDs in the scan
2008                  * request, so invert the index here.
2009                  */
2010                 idx = mvm->n_nd_match_sets - i - 1;
2011                 match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
2012                 memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
2013                        match->ssid.ssid_len);
2014
2015                 if (mvm->n_nd_channels < n_channels)
2016                         continue;
2017
2018                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
2019                         if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
2020                                 match->channels[match->n_channels++] =
2021                                         mvm->nd_channels[j]->center_freq;
2022         }
2023
2024 out_report_nd:
2025         wakeup.net_detect = net_detect;
2026 out:
2027         iwl_mvm_free_nd(mvm);
2028
2029         mutex_unlock(&mvm->mutex);
2030         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
2031
2032         if (net_detect) {
2033                 for (i = 0; i < net_detect->n_matches; i++)
2034                         kfree(net_detect->matches[i]);
2035                 kfree(net_detect);
2036         }
2037 }
2038
2039 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
2040 {
2041 #ifdef CONFIG_IWLWIFI_DEBUGFS
2042         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
2043         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
2044         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
2045
2046         if (!mvm->store_d3_resume_sram)
2047                 return;
2048
2049         if (!mvm->d3_resume_sram) {
2050                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
2051                 if (!mvm->d3_resume_sram)
2052                         return;
2053         }
2054
2055         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
2056 #endif
2057 }
2058
2059 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
2060                                        struct ieee80211_vif *vif)
2061 {
2062         /* skip the one we keep connection on */
2063         if (data == vif)
2064                 return;
2065
2066         if (vif->type == NL80211_IFTYPE_STATION)
2067                 ieee80211_resume_disconnect(vif);
2068 }
2069
2070 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
2071 {
2072         struct ieee80211_vif *vif = NULL;
2073         int ret = 1;
2074         enum iwl_d3_status d3_status;
2075         bool keep = false;
2076         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2077                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2078
2079         u32 flags = CMD_ASYNC | CMD_HIGH_PRIO | CMD_SEND_IN_IDLE |
2080                                     CMD_WAKE_UP_TRANS;
2081
2082         mutex_lock(&mvm->mutex);
2083
2084         /* get the BSS vif pointer again */
2085         vif = iwl_mvm_get_bss_vif(mvm);
2086         if (IS_ERR_OR_NULL(vif))
2087                 goto err;
2088
2089         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test, !unified_image);
2090         if (ret)
2091                 goto err;
2092
2093         if (d3_status != IWL_D3_STATUS_ALIVE) {
2094                 IWL_INFO(mvm, "Device was reset during suspend\n");
2095                 goto err;
2096         }
2097
2098         /* query SRAM first in case we want event logging */
2099         iwl_mvm_read_d3_sram(mvm);
2100
2101         /*
2102          * Query the current location and source from the D3 firmware so we
2103          * can play it back when we re-intiailize the D0 firmware
2104          */
2105         iwl_mvm_update_changed_regdom(mvm);
2106
2107         if (mvm->net_detect) {
2108                 /* If this is a non-unified image, we restart the FW,
2109                  * so no need to stop the netdetect scan.  If that
2110                  * fails, continue and try to get the wake-up reasons,
2111                  * but trigger a HW restart by keeping a failure code
2112                  * in ret.
2113                  */
2114                 if (unified_image)
2115                         ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_NETDETECT,
2116                                                 false);
2117
2118                 iwl_mvm_query_netdetect_reasons(mvm, vif);
2119                 /* has unlocked the mutex, so skip that */
2120                 goto out;
2121         } else {
2122                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
2123 #ifdef CONFIG_IWLWIFI_DEBUGFS
2124                 if (keep)
2125                         mvm->keep_vif = vif;
2126 #endif
2127                 /* has unlocked the mutex, so skip that */
2128                 goto out_iterate;
2129         }
2130
2131 err:
2132         iwl_mvm_free_nd(mvm);
2133         mutex_unlock(&mvm->mutex);
2134
2135 out_iterate:
2136         if (!test)
2137                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
2138                         IEEE80211_IFACE_ITER_NORMAL,
2139                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
2140
2141 out:
2142         if (unified_image && !ret) {
2143                 ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, flags, 0, NULL);
2144                 if (!ret) /* D3 ended successfully - no need to reset device */
2145                         return 0;
2146         }
2147
2148         /*
2149          * Reconfigure the device in one of the following cases:
2150          * 1. We are not using a unified image
2151          * 2. We are using a unified image but had an error while exiting D3
2152          */
2153         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
2154         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
2155         /*
2156          * When switching images we return 1, which causes mac80211
2157          * to do a reconfig with IEEE80211_RECONFIG_TYPE_RESTART.
2158          * This type of reconfig calls iwl_mvm_restart_complete(),
2159          * where we unref the IWL_MVM_REF_UCODE_DOWN, so we need
2160          * to take the reference here.
2161          */
2162         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
2163
2164         return 1;
2165 }
2166
2167 static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
2168 {
2169         iwl_trans_resume(mvm->trans);
2170
2171         return __iwl_mvm_resume(mvm, false);
2172 }
2173
2174 static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
2175 {
2176         bool exit_now;
2177         enum iwl_d3_status d3_status;
2178         struct iwl_trans *trans = mvm->trans;
2179
2180         iwl_trans_d3_resume(trans, &d3_status, false, false);
2181
2182         /*
2183          * make sure to clear D0I3_DEFER_WAKEUP before
2184          * calling iwl_trans_resume(), which might wait
2185          * for d0i3 exit completion.
2186          */
2187         mutex_lock(&mvm->d0i3_suspend_mutex);
2188         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
2189         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
2190                                         &mvm->d0i3_suspend_flags);
2191         mutex_unlock(&mvm->d0i3_suspend_mutex);
2192         if (exit_now) {
2193                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
2194                 _iwl_mvm_exit_d0i3(mvm);
2195         }
2196
2197         iwl_trans_resume(trans);
2198
2199         if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
2200                 int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
2201
2202                 if (ret)
2203                         return ret;
2204                 /*
2205                  * d0i3 exit will be deferred until reconfig_complete.
2206                  * make sure there we are out of d0i3.
2207                  */
2208         }
2209         return 0;
2210 }
2211
2212 int iwl_mvm_resume(struct ieee80211_hw *hw)
2213 {
2214         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2215         int ret;
2216
2217         if (mvm->trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2218                 ret = iwl_mvm_resume_d0i3(mvm);
2219         else
2220                 ret = iwl_mvm_resume_d3(mvm);
2221
2222         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2223
2224         return ret;
2225 }
2226
2227 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2228 {
2229         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2230
2231         device_set_wakeup_enable(mvm->trans->dev, enabled);
2232 }
2233
2234 #ifdef CONFIG_IWLWIFI_DEBUGFS
2235 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2236 {
2237         struct iwl_mvm *mvm = inode->i_private;
2238         int err;
2239
2240         if (mvm->d3_test_active)
2241                 return -EBUSY;
2242
2243         file->private_data = inode->i_private;
2244
2245         ieee80211_stop_queues(mvm->hw);
2246         synchronize_net();
2247
2248         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
2249
2250         /* start pseudo D3 */
2251         rtnl_lock();
2252         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2253         rtnl_unlock();
2254         if (err > 0)
2255                 err = -EINVAL;
2256         if (err) {
2257                 ieee80211_wake_queues(mvm->hw);
2258                 return err;
2259         }
2260         mvm->d3_test_active = true;
2261         mvm->keep_vif = NULL;
2262         return 0;
2263 }
2264
2265 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2266                                     size_t count, loff_t *ppos)
2267 {
2268         struct iwl_mvm *mvm = file->private_data;
2269         u32 pme_asserted;
2270
2271         while (true) {
2272                 /* read pme_ptr if available */
2273                 if (mvm->d3_test_pme_ptr) {
2274                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
2275                                                 mvm->d3_test_pme_ptr);
2276                         if (pme_asserted)
2277                                 break;
2278                 }
2279
2280                 if (msleep_interruptible(100))
2281                         break;
2282         }
2283
2284         return 0;
2285 }
2286
2287 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2288                                               struct ieee80211_vif *vif)
2289 {
2290         /* skip the one we keep connection on */
2291         if (_data == vif)
2292                 return;
2293
2294         if (vif->type == NL80211_IFTYPE_STATION)
2295                 ieee80211_connection_loss(vif);
2296 }
2297
2298 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2299 {
2300         struct iwl_mvm *mvm = inode->i_private;
2301         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2302                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2303
2304         mvm->d3_test_active = false;
2305
2306         rtnl_lock();
2307         __iwl_mvm_resume(mvm, true);
2308         rtnl_unlock();
2309
2310         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2311
2312         iwl_abort_notification_waits(&mvm->notif_wait);
2313         if (!unified_image) {
2314                 int remaining_time = 10;
2315
2316                 ieee80211_restart_hw(mvm->hw);
2317
2318                 /* wait for restart and disconnect all interfaces */
2319                 while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2320                        remaining_time > 0) {
2321                         remaining_time--;
2322                         msleep(1000);
2323                 }
2324
2325                 if (remaining_time == 0)
2326                         IWL_ERR(mvm, "Timed out waiting for HW restart!\n");
2327         }
2328
2329         ieee80211_iterate_active_interfaces_atomic(
2330                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2331                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2332
2333         ieee80211_wake_queues(mvm->hw);
2334
2335         return 0;
2336 }
2337
2338 const struct file_operations iwl_dbgfs_d3_test_ops = {
2339         .llseek = no_llseek,
2340         .open = iwl_mvm_d3_test_open,
2341         .read = iwl_mvm_d3_test_read,
2342         .release = iwl_mvm_d3_test_release,
2343 };
2344 #endif