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  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
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  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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  46  *    the documentation and/or other materials provided with the
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65
  66 #include <linux/etherdevice.h>
  67 #include <linux/ip.h>
  68 #include <linux/fs.h>
  69 #include <net/cfg80211.h>
  70 #include <net/ipv6.h>
  71 #include <net/tcp.h>
  72 #include <net/addrconf.h>
  73 #include "iwl-modparams.h"
  74 #include "fw-api.h"
  75 #include "mvm.h"
  76
  77 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  78                             struct ieee80211_vif *vif,
  79                             struct cfg80211_gtk_rekey_data *data)
  80 {
  81         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  82         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  83
  84         if (iwlwifi_mod_params.sw_crypto)
  85                 return;
  86
  87         mutex_lock(&mvm->mutex);
  88
  89         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  90         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  91         mvmvif->rekey_data.replay_ctr =
  92                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
  93         mvmvif->rekey_data.valid = true;
  94
  95         mutex_unlock(&mvm->mutex);
  96 }
  97
  98 #if IS_ENABLED(CONFIG_IPV6)
  99 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
 100                               struct ieee80211_vif *vif,
 101                               struct inet6_dev *idev)
 102 {
 103         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 104         struct inet6_ifaddr *ifa;
 105         int idx = 0;
 106
 107         memset(mvmvif->tentative_addrs, 0, sizeof(mvmvif->tentative_addrs));
 108
 109         read_lock_bh(&idev->lock);
 110         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 111                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 112                 if (ifa->flags & IFA_F_TENTATIVE)
 113                         __set_bit(idx, mvmvif->tentative_addrs);
 114                 idx++;
 115                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
 116                         break;
 117         }
 118         read_unlock_bh(&idev->lock);
 119
 120         mvmvif->num_target_ipv6_addrs = idx;
 121 }
 122 #endif
 123
 124 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 125                                      struct ieee80211_vif *vif, int idx)
 126 {
 127         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 128
 129         mvmvif->tx_key_idx = idx;
 130 }
 131
 132 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 133 {
 134         int i;
 135
 136         for (i = 0; i < IWL_P1K_SIZE; i++)
 137                 out[i] = cpu_to_le16(p1k[i]);
 138 }
 139
 140 static const u8 *iwl_mvm_find_max_pn(struct ieee80211_key_conf *key,
 141                                      struct iwl_mvm_key_pn *ptk_pn,
 142                                      struct ieee80211_key_seq *seq,
 143                                      int tid, int queues)
 144 {
 145         const u8 *ret = seq->ccmp.pn;
 146         int i;
 147
 148         /* get the PN from mac80211, used on the default queue */
 149         ieee80211_get_key_rx_seq(key, tid, seq);
 150
 151         /* and use the internal data for the other queues */
 152         for (i = 1; i < queues; i++) {
 153                 const u8 *tmp = ptk_pn->q[i].pn[tid];
 154
 155                 if (memcmp(ret, tmp, IEEE80211_CCMP_PN_LEN) <= 0)
 156                         ret = tmp;
 157         }
 158
 159         return ret;
 160 }
 161
 162 struct wowlan_key_data {
 163         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 164         struct iwl_wowlan_tkip_params_cmd *tkip;
 165         bool error, use_rsc_tsc, use_tkip, configure_keys;
 166         int wep_key_idx;
 167 };
 168
 169 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 170                                         struct ieee80211_vif *vif,
 171                                         struct ieee80211_sta *sta,
 172                                         struct ieee80211_key_conf *key,
 173                                         void *_data)
 174 {
 175         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 176         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 177         struct wowlan_key_data *data = _data;
 178         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 179         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 180         struct iwl_p1k_cache *rx_p1ks;
 181         u8 *rx_mic_key;
 182         struct ieee80211_key_seq seq;
 183         u32 cur_rx_iv32 = 0;
 184         u16 p1k[IWL_P1K_SIZE];
 185         int ret, i;
 186
 187         switch (key->cipher) {
 188         case WLAN_CIPHER_SUITE_WEP40:
 189         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 190                 struct {
 191                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 192                         struct iwl_mvm_wep_key wep_key;
 193                 } __packed wkc = {
 194                         .wep_key_cmd.mac_id_n_color =
 195                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 196                                                                 mvmvif->color)),
 197                         .wep_key_cmd.num_keys = 1,
 198                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 199                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 200                         .wep_key.key_index = key->keyidx,
 201                         .wep_key.key_size = key->keylen,
 202                 };
 203
 204                 /*
 205                  * This will fail -- the key functions don't set support
 206                  * pairwise WEP keys. However, that's better than silently
 207                  * failing WoWLAN. Or maybe not?
 208                  */
 209                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 210                         break;
 211
 212                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 213                 if (key->keyidx == mvmvif->tx_key_idx) {
 214                         /* TX key must be at offset 0 */
 215                         wkc.wep_key.key_offset = 0;
 216                 } else {
 217                         /* others start at 1 */
 218                         data->wep_key_idx++;
 219                         wkc.wep_key.key_offset = data->wep_key_idx;
 220                 }
 221
 222                 if (data->configure_keys) {
 223                         mutex_lock(&mvm->mutex);
 224                         ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0,
 225                                                    sizeof(wkc), &wkc);
 226                         data->error = ret != 0;
 227
 228                         mvm->ptk_ivlen = key->iv_len;
 229                         mvm->ptk_icvlen = key->icv_len;
 230                         mvm->gtk_ivlen = key->iv_len;
 231                         mvm->gtk_icvlen = key->icv_len;
 232                         mutex_unlock(&mvm->mutex);
 233                 }
 234
 235                 /* don't upload key again */
 236                 return;
 237         }
 238         default:
 239                 data->error = true;
 240                 return;
 241         case WLAN_CIPHER_SUITE_AES_CMAC:
 242                 /*
 243                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 244                  * but we also shouldn't abort suspend due to that. It does have
 245                  * support for the IGTK key renewal, but doesn't really use the
 246                  * IGTK for anything. This means we could spuriously wake up or
 247                  * be deauthenticated, but that was considered acceptable.
 248                  */
 249                 return;
 250         case WLAN_CIPHER_SUITE_TKIP:
 251                 if (sta) {
 252                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 253                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 254
 255                         rx_p1ks = data->tkip->rx_uni;
 256
 257                         ieee80211_get_key_tx_seq(key, &seq);
 258                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 259                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 260
 261                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 262                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 263
 264                         memcpy(data->tkip->mic_keys.tx,
 265                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 266                                IWL_MIC_KEY_SIZE);
 267
 268                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 269                 } else {
 270                         tkip_sc =
 271                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 272                         rx_p1ks = data->tkip->rx_multi;
 273                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 274                 }
 275
 276                 /*
 277                  * For non-QoS this relies on the fact that both the uCode and
 278                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 279                  * for checking the IV in the frames.
 280                  */
 281                 for (i = 0; i < IWL_NUM_RSC; i++) {
 282                         ieee80211_get_key_rx_seq(key, i, &seq);
 283                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 284                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 285                         /* wrapping isn't allowed, AP must rekey */
 286                         if (seq.tkip.iv32 > cur_rx_iv32)
 287                                 cur_rx_iv32 = seq.tkip.iv32;
 288                 }
 289
 290                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 291                                           cur_rx_iv32, p1k);
 292                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 293                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 294                                           cur_rx_iv32 + 1, p1k);
 295                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 296
 297                 memcpy(rx_mic_key,
 298                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 299                        IWL_MIC_KEY_SIZE);
 300
 301                 data->use_tkip = true;
 302                 data->use_rsc_tsc = true;
 303                 break;
 304         case WLAN_CIPHER_SUITE_CCMP:
 305                 if (sta) {
 306                         u64 pn64;
 307
 308                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 309                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 310
 311                         pn64 = atomic64_read(&key->tx_pn);
 312                         aes_tx_sc->pn = cpu_to_le64(pn64);
 313                 } else {
 314                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 315                 }
 316
 317                 /*
 318                  * For non-QoS this relies on the fact that both the uCode and
 319                  * mac80211/our RX code use TID 0 for checking the PN.
 320                  */
 321                 if (sta && iwl_mvm_has_new_rx_api(mvm)) {
 322                         struct iwl_mvm_sta *mvmsta;
 323                         struct iwl_mvm_key_pn *ptk_pn;
 324                         const u8 *pn;
 325
 326                         mvmsta = iwl_mvm_sta_from_mac80211(sta);
 327                         ptk_pn = rcu_dereference_protected(
 328                                                 mvmsta->ptk_pn[key->keyidx],
 329                                                 lockdep_is_held(&mvm->mutex));
 330                         if (WARN_ON(!ptk_pn))
 331                                 break;
 332
 333                         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 334                                 pn = iwl_mvm_find_max_pn(key, ptk_pn, &seq, i,
 335                                                 mvm->trans->num_rx_queues);
 336                                 aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
 337                                                            ((u64)pn[4] << 8) |
 338                                                            ((u64)pn[3] << 16) |
 339                                                            ((u64)pn[2] << 24) |
 340                                                            ((u64)pn[1] << 32) |
 341                                                            ((u64)pn[0] << 40));
 342                         }
 343                 } else {
 344                         for (i = 0; i < IWL_NUM_RSC; i++) {
 345                                 u8 *pn = seq.ccmp.pn;
 346
 347                                 ieee80211_get_key_rx_seq(key, i, &seq);
 348                                 aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
 349                                                            ((u64)pn[4] << 8) |
 350                                                            ((u64)pn[3] << 16) |
 351                                                            ((u64)pn[2] << 24) |
 352                                                            ((u64)pn[1] << 32) |
 353                                                            ((u64)pn[0] << 40));
 354                         }
 355                 }
 356                 data->use_rsc_tsc = true;
 357                 break;
 358         }
 359
 360         if (data->configure_keys) {
 361                 mutex_lock(&mvm->mutex);
 362                 /*
 363                  * The D3 firmware hardcodes the key offset 0 as the key it
 364                  * uses to transmit packets to the AP, i.e. the PTK.
 365                  */
 366                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 367                         mvm->ptk_ivlen = key->iv_len;
 368                         mvm->ptk_icvlen = key->icv_len;
 369                         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 0);
 370                 } else {
 371                         /*
 372                          * firmware only supports TSC/RSC for a single key,
 373                          * so if there are multiple keep overwriting them
 374                          * with new ones -- this relies on mac80211 doing
 375                          * list_add_tail().
 376                          */
 377                         mvm->gtk_ivlen = key->iv_len;
 378                         mvm->gtk_icvlen = key->icv_len;
 379                         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 1);
 380                 }
 381                 mutex_unlock(&mvm->mutex);
 382                 data->error = ret != 0;
 383         }
 384 }
 385
 386 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 387                                  struct cfg80211_wowlan *wowlan)
 388 {
 389         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 390         struct iwl_host_cmd cmd = {
 391                 .id = WOWLAN_PATTERNS,
 392                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 393         };
 394         int i, err;
 395
 396         if (!wowlan->n_patterns)
 397                 return 0;
 398
 399         cmd.len[0] = sizeof(*pattern_cmd) +
 400                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 401
 402         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 403         if (!pattern_cmd)
 404                 return -ENOMEM;
 405
 406         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 407
 408         for (i = 0; i < wowlan->n_patterns; i++) {
 409                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 410
 411                 memcpy(&pattern_cmd->patterns[i].mask,
 412                        wowlan->patterns[i].mask, mask_len);
 413                 memcpy(&pattern_cmd->patterns[i].pattern,
 414                        wowlan->patterns[i].pattern,
 415                        wowlan->patterns[i].pattern_len);
 416                 pattern_cmd->patterns[i].mask_size = mask_len;
 417                 pattern_cmd->patterns[i].pattern_size =
 418                         wowlan->patterns[i].pattern_len;
 419         }
 420
 421         cmd.data[0] = pattern_cmd;
 422         err = iwl_mvm_send_cmd(mvm, &cmd);
 423         kfree(pattern_cmd);
 424         return err;
 425 }
 426
 427 enum iwl_mvm_tcp_packet_type {
 428         MVM_TCP_TX_SYN,
 429         MVM_TCP_RX_SYNACK,
 430         MVM_TCP_TX_DATA,
 431         MVM_TCP_RX_ACK,
 432         MVM_TCP_RX_WAKE,
 433         MVM_TCP_TX_FIN,
 434 };
 435
 436 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 437 {
 438         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 439         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 440 }
 441
 442 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
 443                                      struct cfg80211_wowlan_tcp *tcp,
 444                                      void *_pkt, u8 *mask,
 445                                      __le16 *pseudo_hdr_csum,
 446                                      enum iwl_mvm_tcp_packet_type ptype)
 447 {
 448         struct {
 449                 struct ethhdr eth;
 450                 struct iphdr ip;
 451                 struct tcphdr tcp;
 452                 u8 data[];
 453         } __packed *pkt = _pkt;
 454         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 455         int i;
 456
 457         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 458         pkt->ip.version = 4;
 459         pkt->ip.ihl = 5;
 460         pkt->ip.protocol = IPPROTO_TCP;
 461
 462         switch (ptype) {
 463         case MVM_TCP_TX_SYN:
 464         case MVM_TCP_TX_DATA:
 465         case MVM_TCP_TX_FIN:
 466                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 467                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 468                 pkt->ip.ttl = 128;
 469                 pkt->ip.saddr = tcp->src;
 470                 pkt->ip.daddr = tcp->dst;
 471                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 472                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 473                 /* overwritten for TX SYN later */
 474                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 475                 pkt->tcp.window = cpu_to_be16(65000);
 476                 break;
 477         case MVM_TCP_RX_SYNACK:
 478         case MVM_TCP_RX_ACK:
 479         case MVM_TCP_RX_WAKE:
 480                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 481                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 482                 pkt->ip.saddr = tcp->dst;
 483                 pkt->ip.daddr = tcp->src;
 484                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 485                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 486                 break;
 487         default:
 488                 WARN_ON(1);
 489                 return;
 490         }
 491
 492         switch (ptype) {
 493         case MVM_TCP_TX_SYN:
 494                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 495                 memset(pkt->data, 0x01, 8);
 496                 ip_tot_len += 8;
 497                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 498                 pkt->tcp.syn = 1;
 499                 break;
 500         case MVM_TCP_TX_DATA:
 501                 ip_tot_len += tcp->payload_len;
 502                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 503                 pkt->tcp.psh = 1;
 504                 pkt->tcp.ack = 1;
 505                 break;
 506         case MVM_TCP_TX_FIN:
 507                 pkt->tcp.fin = 1;
 508                 pkt->tcp.ack = 1;
 509                 break;
 510         case MVM_TCP_RX_SYNACK:
 511                 pkt->tcp.syn = 1;
 512                 pkt->tcp.ack = 1;
 513                 break;
 514         case MVM_TCP_RX_ACK:
 515                 pkt->tcp.ack = 1;
 516                 break;
 517         case MVM_TCP_RX_WAKE:
 518                 ip_tot_len += tcp->wake_len;
 519                 pkt->tcp.psh = 1;
 520                 pkt->tcp.ack = 1;
 521                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 522                 break;
 523         }
 524
 525         switch (ptype) {
 526         case MVM_TCP_TX_SYN:
 527         case MVM_TCP_TX_DATA:
 528         case MVM_TCP_TX_FIN:
 529                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 530                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 531                 break;
 532         case MVM_TCP_RX_WAKE:
 533                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 534                         u8 tmp = tcp->wake_mask[i];
 535                         mask[i + 6] |= tmp << 6;
 536                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 537                                 mask[i + 7] = tmp >> 2;
 538                 }
 539                 /* fall through for ethernet/IP/TCP headers mask */
 540         case MVM_TCP_RX_SYNACK:
 541         case MVM_TCP_RX_ACK:
 542                 mask[0] = 0xff; /* match ethernet */
 543                 /*
 544                  * match ethernet, ip.version, ip.ihl
 545                  * the ip.ihl half byte is really masked out by firmware
 546                  */
 547                 mask[1] = 0x7f;
 548                 mask[2] = 0x80; /* match ip.protocol */
 549                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 550                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 551                 mask[5] = 0x80; /* match tcp flags */
 552                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 553                 break;
 554         };
 555
 556         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 557                                             pkt->ip.saddr, pkt->ip.daddr);
 558 }
 559
 560 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 561                                         struct ieee80211_vif *vif,
 562                                         struct cfg80211_wowlan_tcp *tcp)
 563 {
 564         struct iwl_wowlan_remote_wake_config *cfg;
 565         struct iwl_host_cmd cmd = {
 566                 .id = REMOTE_WAKE_CONFIG_CMD,
 567                 .len = { sizeof(*cfg), },
 568                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 569         };
 570         int ret;
 571
 572         if (!tcp)
 573                 return 0;
 574
 575         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 576         if (!cfg)
 577                 return -ENOMEM;
 578         cmd.data[0] = cfg;
 579
 580         cfg->max_syn_retries = 10;
 581         cfg->max_data_retries = 10;
 582         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 583         cfg->tcp_ack_timeout = 1; /* seconds */
 584
 585         /* SYN (TX) */
 586         iwl_mvm_build_tcp_packet(
 587                 vif, tcp, cfg->syn_tx.data, NULL,
 588                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 589                 MVM_TCP_TX_SYN);
 590         cfg->syn_tx.info.tcp_payload_length = 0;
 591
 592         /* SYN/ACK (RX) */
 593         iwl_mvm_build_tcp_packet(
 594                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 595                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 596                 MVM_TCP_RX_SYNACK);
 597         cfg->synack_rx.info.tcp_payload_length = 0;
 598
 599         /* KEEPALIVE/ACK (TX) */
 600         iwl_mvm_build_tcp_packet(
 601                 vif, tcp, cfg->keepalive_tx.data, NULL,
 602                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 603                 MVM_TCP_TX_DATA);
 604         cfg->keepalive_tx.info.tcp_payload_length =
 605                 cpu_to_le16(tcp->payload_len);
 606         cfg->sequence_number_offset = tcp->payload_seq.offset;
 607         /* length must be 0..4, the field is little endian */
 608         cfg->sequence_number_length = tcp->payload_seq.len;
 609         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 610         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 611         if (tcp->payload_tok.len) {
 612                 cfg->token_offset = tcp->payload_tok.offset;
 613                 cfg->token_length = tcp->payload_tok.len;
 614                 cfg->num_tokens =
 615                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 616                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 617                        tcp->tokens_size);
 618         } else {
 619                 /* set tokens to max value to almost never run out */
 620                 cfg->num_tokens = cpu_to_le16(65535);
 621         }
 622
 623         /* ACK (RX) */
 624         iwl_mvm_build_tcp_packet(
 625                 vif, tcp, cfg->keepalive_ack_rx.data,
 626                 cfg->keepalive_ack_rx.rx_mask,
 627                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 628                 MVM_TCP_RX_ACK);
 629         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 630
 631         /* WAKEUP (RX) */
 632         iwl_mvm_build_tcp_packet(
 633                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 634                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 635                 MVM_TCP_RX_WAKE);
 636         cfg->wake_rx.info.tcp_payload_length =
 637                 cpu_to_le16(tcp->wake_len);
 638
 639         /* FIN */
 640         iwl_mvm_build_tcp_packet(
 641                 vif, tcp, cfg->fin_tx.data, NULL,
 642                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 643                 MVM_TCP_TX_FIN);
 644         cfg->fin_tx.info.tcp_payload_length = 0;
 645
 646         ret = iwl_mvm_send_cmd(mvm, &cmd);
 647         kfree(cfg);
 648
 649         return ret;
 650 }
 651
 652 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 653                                 struct ieee80211_sta *ap_sta)
 654 {
 655         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 656         struct ieee80211_chanctx_conf *ctx;
 657         u8 chains_static, chains_dynamic;
 658         struct cfg80211_chan_def chandef;
 659         int ret, i;
 660         struct iwl_binding_cmd binding_cmd = {};
 661         struct iwl_time_quota_cmd quota_cmd = {};
 662         u32 status;
 663
 664         /* add back the PHY */
 665         if (WARN_ON(!mvmvif->phy_ctxt))
 666                 return -EINVAL;
 667
 668         rcu_read_lock();
 669         ctx = rcu_dereference(vif->chanctx_conf);
 670         if (WARN_ON(!ctx)) {
 671                 rcu_read_unlock();
 672                 return -EINVAL;
 673         }
 674         chandef = ctx->def;
 675         chains_static = ctx->rx_chains_static;
 676         chains_dynamic = ctx->rx_chains_dynamic;
 677         rcu_read_unlock();
 678
 679         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 680                                    chains_static, chains_dynamic);
 681         if (ret)
 682                 return ret;
 683
 684         /* add back the MAC */
 685         mvmvif->uploaded = false;
 686
 687         if (WARN_ON(!vif->bss_conf.assoc))
 688                 return -EINVAL;
 689
 690         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 691         if (ret)
 692                 return ret;
 693
 694         /* add back binding - XXX refactor? */
 695         binding_cmd.id_and_color =
 696                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 697                                                 mvmvif->phy_ctxt->color));
 698         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 699         binding_cmd.phy =
 700                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 701                                                 mvmvif->phy_ctxt->color));
 702         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 703                                                               mvmvif->color));
 704         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 705                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 706
 707         status = 0;
 708         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 709                                           sizeof(binding_cmd), &binding_cmd,
 710                                           &status);
 711         if (ret) {
 712                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 713                 return ret;
 714         }
 715
 716         if (status) {
 717                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 718                 return -EIO;
 719         }
 720
 721         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 722         if (ret)
 723                 return ret;
 724         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 725
 726         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
 727         if (ret)
 728                 return ret;
 729
 730         /* and some quota */
 731         quota_cmd.quotas[0].id_and_color =
 732                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 733                                                 mvmvif->phy_ctxt->color));
 734         quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 735         quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 736
 737         for (i = 1; i < MAX_BINDINGS; i++)
 738                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 739
 740         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 741                                    sizeof(quota_cmd), &quota_cmd);
 742         if (ret)
 743                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 744
 745         if (iwl_mvm_is_lar_supported(mvm) && iwl_mvm_init_fw_regd(mvm))
 746                 IWL_ERR(mvm, "Failed to initialize D3 LAR information\n");
 747
 748         return 0;
 749 }
 750
 751 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 752                                        struct ieee80211_vif *vif)
 753 {
 754         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 755         struct iwl_nonqos_seq_query_cmd query_cmd = {
 756                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 757                 .mac_id_n_color =
 758                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 759                                                         mvmvif->color)),
 760         };
 761         struct iwl_host_cmd cmd = {
 762                 .id = NON_QOS_TX_COUNTER_CMD,
 763                 .flags = CMD_WANT_SKB,
 764         };
 765         int err;
 766         u32 size;
 767
 768         cmd.data[0] = &query_cmd;
 769         cmd.len[0] = sizeof(query_cmd);
 770
 771         err = iwl_mvm_send_cmd(mvm, &cmd);
 772         if (err)
 773                 return err;
 774
 775         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 776         if (size < sizeof(__le16)) {
 777                 err = -EINVAL;
 778         } else {
 779                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 780                 /* firmware returns next, not last-used seqno */
 781                 err = (u16) (err - 0x10);
 782         }
 783
 784         iwl_free_resp(&cmd);
 785         return err;
 786 }
 787
 788 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 789 {
 790         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 791         struct iwl_nonqos_seq_query_cmd query_cmd = {
 792                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 793                 .mac_id_n_color =
 794                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 795                                                         mvmvif->color)),
 796                 .value = cpu_to_le16(mvmvif->seqno),
 797         };
 798
 799         /* return if called during restart, not resume from D3 */
 800         if (!mvmvif->seqno_valid)
 801                 return;
 802
 803         mvmvif->seqno_valid = false;
 804
 805         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 806                                  sizeof(query_cmd), &query_cmd))
 807                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 808 }
 809
 810 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 811 {
 812         iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
 813
 814         iwl_trans_stop_device(mvm->trans);
 815
 816         /*
 817          * Set the HW restart bit -- this is mostly true as we're
 818          * going to load new firmware and reprogram that, though
 819          * the reprogramming is going to be manual to avoid adding
 820          * all the MACs that aren't support.
 821          * We don't have to clear up everything though because the
 822          * reprogramming is manual. When we resume, we'll actually
 823          * go through a proper restart sequence again to switch
 824          * back to the runtime firmware image.
 825          */
 826         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 827
 828         /* the fw is reset, so all the keys are cleared */
 829         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 830
 831         mvm->ptk_ivlen = 0;
 832         mvm->ptk_icvlen = 0;
 833         mvm->ptk_ivlen = 0;
 834         mvm->ptk_icvlen = 0;
 835
 836         return iwl_mvm_load_d3_fw(mvm);
 837 }
 838
 839 static int
 840 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 841                           struct cfg80211_wowlan *wowlan,
 842                           struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 843                           struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 844                           struct ieee80211_sta *ap_sta)
 845 {
 846         int ret;
 847         struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 848
 849         /* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */
 850
 851         wowlan_config_cmd->is_11n_connection =
 852                                         ap_sta->ht_cap.ht_supported;
 853         wowlan_config_cmd->flags = ENABLE_L3_FILTERING |
 854                 ENABLE_NBNS_FILTERING | ENABLE_DHCP_FILTERING;
 855
 856         /* Query the last used seqno and set it */
 857         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 858         if (ret < 0)
 859                 return ret;
 860
 861         wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret);
 862
 863         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd);
 864
 865         if (wowlan->disconnect)
 866                 wowlan_config_cmd->wakeup_filter |=
 867                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 868                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 869         if (wowlan->magic_pkt)
 870                 wowlan_config_cmd->wakeup_filter |=
 871                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 872         if (wowlan->gtk_rekey_failure)
 873                 wowlan_config_cmd->wakeup_filter |=
 874                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 875         if (wowlan->eap_identity_req)
 876                 wowlan_config_cmd->wakeup_filter |=
 877                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 878         if (wowlan->four_way_handshake)
 879                 wowlan_config_cmd->wakeup_filter |=
 880                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 881         if (wowlan->n_patterns)
 882                 wowlan_config_cmd->wakeup_filter |=
 883                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 884
 885         if (wowlan->rfkill_release)
 886                 wowlan_config_cmd->wakeup_filter |=
 887                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 888
 889         if (wowlan->tcp) {
 890                 /*
 891                  * Set the "link change" (really "link lost") flag as well
 892                  * since that implies losing the TCP connection.
 893                  */
 894                 wowlan_config_cmd->wakeup_filter |=
 895                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 896                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 897                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 898                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 899         }
 900
 901         return 0;
 902 }
 903
 904 static void
 905 iwl_mvm_iter_d0i3_ap_keys(struct iwl_mvm *mvm,
 906                           struct ieee80211_vif *vif,
 907                           void (*iter)(struct ieee80211_hw *hw,
 908                                        struct ieee80211_vif *vif,
 909                                        struct ieee80211_sta *sta,
 910                                        struct ieee80211_key_conf *key,
 911                                        void *data),
 912                           void *data)
 913 {
 914         struct ieee80211_sta *ap_sta;
 915
 916         rcu_read_lock();
 917
 918         ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id]);
 919         if (IS_ERR_OR_NULL(ap_sta))
 920                 goto out;
 921
 922         ieee80211_iter_keys_rcu(mvm->hw, vif, iter, data);
 923 out:
 924         rcu_read_unlock();
 925 }
 926
 927 int iwl_mvm_wowlan_config_key_params(struct iwl_mvm *mvm,
 928                                      struct ieee80211_vif *vif,
 929                                      bool d0i3,
 930                                      u32 cmd_flags)
 931 {
 932         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 933         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 934         struct wowlan_key_data key_data = {
 935                 .configure_keys = !d0i3,
 936                 .use_rsc_tsc = false,
 937                 .tkip = &tkip_cmd,
 938                 .use_tkip = false,
 939         };
 940         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 941         int ret;
 942
 943         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 944         if (!key_data.rsc_tsc)
 945                 return -ENOMEM;
 946
 947         /*
 948          * if we have to configure keys, call ieee80211_iter_keys(),
 949          * as we need non-atomic context in order to take the
 950          * required locks.
 951          * for the d0i3 we can't use ieee80211_iter_keys(), as
 952          * taking (almost) any mutex might result in deadlock.
 953          */
 954         if (!d0i3) {
 955                 /*
 956                  * Note that currently we don't propagate cmd_flags
 957                  * to the iterator. In case of key_data.configure_keys,
 958                  * all the configured commands are SYNC, and
 959                  * iwl_mvm_wowlan_program_keys() will take care of
 960                  * locking/unlocking mvm->mutex.
 961                  */
 962                 ieee80211_iter_keys(mvm->hw, vif,
 963                                     iwl_mvm_wowlan_program_keys,
 964                                     &key_data);
 965         } else {
 966                 iwl_mvm_iter_d0i3_ap_keys(mvm, vif,
 967                                           iwl_mvm_wowlan_program_keys,
 968                                           &key_data);
 969         }
 970
 971         if (key_data.error) {
 972                 ret = -EIO;
 973                 goto out;
 974         }
 975
 976         if (key_data.use_rsc_tsc) {
 977                 ret = iwl_mvm_send_cmd_pdu(mvm,
 978                                            WOWLAN_TSC_RSC_PARAM, cmd_flags,
 979                                            sizeof(*key_data.rsc_tsc),
 980                                            key_data.rsc_tsc);
 981                 if (ret)
 982                         goto out;
 983         }
 984
 985         if (key_data.use_tkip) {
 986                 ret = iwl_mvm_send_cmd_pdu(mvm,
 987                                            WOWLAN_TKIP_PARAM,
 988                                            cmd_flags, sizeof(tkip_cmd),
 989                                            &tkip_cmd);
 990                 if (ret)
 991                         goto out;
 992         }
 993
 994         /* configure rekey data only if offloaded rekey is supported (d3) */
 995         if (mvmvif->rekey_data.valid && !d0i3) {
 996                 memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 997                 memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 998                        NL80211_KCK_LEN);
 999                 kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1000                 memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1001                        NL80211_KEK_LEN);
1002                 kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1003                 kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1004
1005                 ret = iwl_mvm_send_cmd_pdu(mvm,
1006                                            WOWLAN_KEK_KCK_MATERIAL, cmd_flags,
1007                                            sizeof(kek_kck_cmd),
1008                                            &kek_kck_cmd);
1009                 if (ret)
1010                         goto out;
1011         }
1012         ret = 0;
1013 out:
1014         kfree(key_data.rsc_tsc);
1015         return ret;
1016 }
1017
1018 static int
1019 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
1020                       struct cfg80211_wowlan *wowlan,
1021                       struct iwl_wowlan_config_cmd *wowlan_config_cmd,
1022                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
1023                       struct ieee80211_sta *ap_sta)
1024 {
1025         int ret;
1026
1027         ret = iwl_mvm_switch_to_d3(mvm);
1028         if (ret)
1029                 return ret;
1030
1031         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
1032         if (ret)
1033                 return ret;
1034
1035         if (!iwlwifi_mod_params.sw_crypto) {
1036                 /*
1037                  * This needs to be unlocked due to lock ordering
1038                  * constraints. Since we're in the suspend path
1039                  * that isn't really a problem though.
1040                  */
1041                 mutex_unlock(&mvm->mutex);
1042                 ret = iwl_mvm_wowlan_config_key_params(mvm, vif, false,
1043                                                        CMD_ASYNC);
1044                 mutex_lock(&mvm->mutex);
1045                 if (ret)
1046                         return ret;
1047         }
1048
1049         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1050                                    sizeof(*wowlan_config_cmd),
1051                                    wowlan_config_cmd);
1052         if (ret)
1053                 return ret;
1054
1055         ret = iwl_mvm_send_patterns(mvm, wowlan);
1056         if (ret)
1057                 return ret;
1058
1059         ret = iwl_mvm_send_proto_offload(mvm, vif, false, true, 0);
1060         if (ret)
1061                 return ret;
1062
1063         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1064         return ret;
1065 }
1066
1067 static int
1068 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
1069                          struct cfg80211_wowlan *wowlan,
1070                          struct cfg80211_sched_scan_request *nd_config,
1071                          struct ieee80211_vif *vif)
1072 {
1073         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1074         int ret;
1075
1076         ret = iwl_mvm_switch_to_d3(mvm);
1077         if (ret)
1078                 return ret;
1079
1080         /* rfkill release can be either for wowlan or netdetect */
1081         if (wowlan->rfkill_release)
1082                 wowlan_config_cmd.wakeup_filter |=
1083                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
1084
1085         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
1086                                    sizeof(wowlan_config_cmd),
1087                                    &wowlan_config_cmd);
1088         if (ret)
1089                 return ret;
1090
1091         ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
1092                                        IWL_MVM_SCAN_NETDETECT);
1093         if (ret)
1094                 return ret;
1095
1096         if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
1097                 return -EBUSY;
1098
1099         /* save the sched scan matchsets... */
1100         if (nd_config->n_match_sets) {
1101                 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
1102                                              sizeof(*nd_config->match_sets) *
1103                                              nd_config->n_match_sets,
1104                                              GFP_KERNEL);
1105                 if (mvm->nd_match_sets)
1106                         mvm->n_nd_match_sets = nd_config->n_match_sets;
1107         }
1108
1109         /* ...and the sched scan channels for later reporting */
1110         mvm->nd_channels = kmemdup(nd_config->channels,
1111                                    sizeof(*nd_config->channels) *
1112                                    nd_config->n_channels,
1113                                    GFP_KERNEL);
1114         if (mvm->nd_channels)
1115                 mvm->n_nd_channels = nd_config->n_channels;
1116
1117         return 0;
1118 }
1119
1120 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
1121 {
1122         kfree(mvm->nd_match_sets);
1123         mvm->nd_match_sets = NULL;
1124         mvm->n_nd_match_sets = 0;
1125         kfree(mvm->nd_channels);
1126         mvm->nd_channels = NULL;
1127         mvm->n_nd_channels = 0;
1128 }
1129
1130 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
1131                              struct cfg80211_wowlan *wowlan,
1132                              bool test)
1133 {
1134         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1135         struct ieee80211_vif *vif = NULL;
1136         struct iwl_mvm_vif *mvmvif = NULL;
1137         struct ieee80211_sta *ap_sta = NULL;
1138         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1139                 /*
1140                  * Program the minimum sleep time to 10 seconds, as many
1141                  * platforms have issues processing a wakeup signal while
1142                  * still being in the process of suspending.
1143                  */
1144                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1145         };
1146         struct iwl_host_cmd d3_cfg_cmd = {
1147                 .id = D3_CONFIG_CMD,
1148                 .flags = CMD_WANT_SKB,
1149                 .data[0] = &d3_cfg_cmd_data,
1150                 .len[0] = sizeof(d3_cfg_cmd_data),
1151         };
1152         int ret;
1153         int len __maybe_unused;
1154
1155         if (!wowlan) {
1156                 /*
1157                  * mac80211 shouldn't get here, but for D3 test
1158                  * it doesn't warrant a warning
1159                  */
1160                 WARN_ON(!test);
1161                 return -EINVAL;
1162         }
1163
1164         mutex_lock(&mvm->mutex);
1165
1166         vif = iwl_mvm_get_bss_vif(mvm);
1167         if (IS_ERR_OR_NULL(vif)) {
1168                 ret = 1;
1169                 goto out_noreset;
1170         }
1171
1172         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1173
1174         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) {
1175                 /* if we're not associated, this must be netdetect */
1176                 if (!wowlan->nd_config) {
1177                         ret = 1;
1178                         goto out_noreset;
1179                 }
1180
1181                 ret = iwl_mvm_netdetect_config(
1182                         mvm, wowlan, wowlan->nd_config, vif);
1183                 if (ret)
1184                         goto out;
1185
1186                 mvm->net_detect = true;
1187         } else {
1188                 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1189
1190                 ap_sta = rcu_dereference_protected(
1191                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1192                         lockdep_is_held(&mvm->mutex));
1193                 if (IS_ERR_OR_NULL(ap_sta)) {
1194                         ret = -EINVAL;
1195                         goto out_noreset;
1196                 }
1197
1198                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1199                                                 vif, mvmvif, ap_sta);
1200                 if (ret)
1201                         goto out_noreset;
1202                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1203                                             vif, mvmvif, ap_sta);
1204                 if (ret)
1205                         goto out;
1206
1207                 mvm->net_detect = false;
1208         }
1209
1210         ret = iwl_mvm_power_update_device(mvm);
1211         if (ret)
1212                 goto out;
1213
1214         ret = iwl_mvm_power_update_mac(mvm);
1215         if (ret)
1216                 goto out;
1217
1218 #ifdef CONFIG_IWLWIFI_DEBUGFS
1219         if (mvm->d3_wake_sysassert)
1220                 d3_cfg_cmd_data.wakeup_flags |=
1221                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1222 #endif
1223
1224         /* must be last -- this switches firmware state */
1225         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1226         if (ret)
1227                 goto out;
1228 #ifdef CONFIG_IWLWIFI_DEBUGFS
1229         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1230         if (len >= sizeof(u32)) {
1231                 mvm->d3_test_pme_ptr =
1232                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1233         }
1234 #endif
1235         iwl_free_resp(&d3_cfg_cmd);
1236
1237         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1238
1239         iwl_trans_d3_suspend(mvm->trans, test);
1240  out:
1241         if (ret < 0) {
1242                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1243                 ieee80211_restart_hw(mvm->hw);
1244                 iwl_mvm_free_nd(mvm);
1245         }
1246  out_noreset:
1247         mutex_unlock(&mvm->mutex);
1248
1249         return ret;
1250 }
1251
1252 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1253 {
1254         struct iwl_notification_wait wait_d3;
1255         static const u16 d3_notif[] = { D3_CONFIG_CMD };
1256         int ret;
1257
1258         iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1259                                    d3_notif, ARRAY_SIZE(d3_notif),
1260                                    NULL, NULL);
1261
1262         ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1263         if (ret)
1264                 goto remove_notif;
1265
1266         ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1267         WARN_ON_ONCE(ret);
1268         return ret;
1269
1270 remove_notif:
1271         iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1272         return ret;
1273 }
1274
1275 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1276 {
1277         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1278         struct iwl_trans *trans = mvm->trans;
1279         int ret;
1280
1281         /* make sure the d0i3 exit work is not pending */
1282         flush_work(&mvm->d0i3_exit_work);
1283
1284         ret = iwl_trans_suspend(trans);
1285         if (ret)
1286                 return ret;
1287
1288         if (wowlan->any) {
1289                 trans->system_pm_mode = IWL_PLAT_PM_MODE_D0I3;
1290
1291                 if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
1292                         ret = iwl_mvm_enter_d0i3_sync(mvm);
1293
1294                         if (ret)
1295                                 return ret;
1296                 }
1297
1298                 mutex_lock(&mvm->d0i3_suspend_mutex);
1299                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1300                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1301
1302                 iwl_trans_d3_suspend(trans, false);
1303
1304                 return 0;
1305         }
1306
1307         trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
1308
1309         return __iwl_mvm_suspend(hw, wowlan, false);
1310 }
1311
1312 /* converted data from the different status responses */
1313 struct iwl_wowlan_status_data {
1314         u16 pattern_number;
1315         u16 qos_seq_ctr[8];
1316         u32 wakeup_reasons;
1317         u32 wake_packet_length;
1318         u32 wake_packet_bufsize;
1319         const u8 *wake_packet;
1320 };
1321
1322 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1323                                           struct ieee80211_vif *vif,
1324                                           struct iwl_wowlan_status_data *status)
1325 {
1326         struct sk_buff *pkt = NULL;
1327         struct cfg80211_wowlan_wakeup wakeup = {
1328                 .pattern_idx = -1,
1329         };
1330         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1331         u32 reasons = status->wakeup_reasons;
1332
1333         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1334                 wakeup_report = NULL;
1335                 goto report;
1336         }
1337
1338         pm_wakeup_event(mvm->dev, 0);
1339
1340         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1341                 wakeup.magic_pkt = true;
1342
1343         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1344                 wakeup.pattern_idx =
1345                         status->pattern_number;
1346
1347         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1348                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1349                 wakeup.disconnect = true;
1350
1351         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1352                 wakeup.gtk_rekey_failure = true;
1353
1354         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1355                 wakeup.rfkill_release = true;
1356
1357         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1358                 wakeup.eap_identity_req = true;
1359
1360         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1361                 wakeup.four_way_handshake = true;
1362
1363         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1364                 wakeup.tcp_connlost = true;
1365
1366         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1367                 wakeup.tcp_nomoretokens = true;
1368
1369         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1370                 wakeup.tcp_match = true;
1371
1372         if (status->wake_packet_bufsize) {
1373                 int pktsize = status->wake_packet_bufsize;
1374                 int pktlen = status->wake_packet_length;
1375                 const u8 *pktdata = status->wake_packet;
1376                 struct ieee80211_hdr *hdr = (void *)pktdata;
1377                 int truncated = pktlen - pktsize;
1378
1379                 /* this would be a firmware bug */
1380                 if (WARN_ON_ONCE(truncated < 0))
1381                         truncated = 0;
1382
1383                 if (ieee80211_is_data(hdr->frame_control)) {
1384                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1385                         int ivlen = 0, icvlen = 4; /* also FCS */
1386
1387                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1388                         if (!pkt)
1389                                 goto report;
1390
1391                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1392                         pktdata += hdrlen;
1393                         pktsize -= hdrlen;
1394
1395                         if (ieee80211_has_protected(hdr->frame_control)) {
1396                                 /*
1397                                  * This is unlocked and using gtk_i(c)vlen,
1398                                  * but since everything is under RTNL still
1399                                  * that's not really a problem - changing
1400                                  * it would be difficult.
1401                                  */
1402                                 if (is_multicast_ether_addr(hdr->addr1)) {
1403                                         ivlen = mvm->gtk_ivlen;
1404                                         icvlen += mvm->gtk_icvlen;
1405                                 } else {
1406                                         ivlen = mvm->ptk_ivlen;
1407                                         icvlen += mvm->ptk_icvlen;
1408                                 }
1409                         }
1410
1411                         /* if truncated, FCS/ICV is (partially) gone */
1412                         if (truncated >= icvlen) {
1413                                 icvlen = 0;
1414                                 truncated -= icvlen;
1415                         } else {
1416                                 icvlen -= truncated;
1417                                 truncated = 0;
1418                         }
1419
1420                         pktsize -= ivlen + icvlen;
1421                         pktdata += ivlen;
1422
1423                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1424
1425                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1426                                 goto report;
1427                         wakeup.packet = pkt->data;
1428                         wakeup.packet_present_len = pkt->len;
1429                         wakeup.packet_len = pkt->len - truncated;
1430                         wakeup.packet_80211 = false;
1431                 } else {
1432                         int fcslen = 4;
1433
1434                         if (truncated >= 4) {
1435                                 truncated -= 4;
1436                                 fcslen = 0;
1437                         } else {
1438                                 fcslen -= truncated;
1439                                 truncated = 0;
1440                         }
1441                         pktsize -= fcslen;
1442                         wakeup.packet = status->wake_packet;
1443                         wakeup.packet_present_len = pktsize;
1444                         wakeup.packet_len = pktlen - truncated;
1445                         wakeup.packet_80211 = true;
1446                 }
1447         }
1448
1449  report:
1450         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1451         kfree_skb(pkt);
1452 }
1453
1454 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1455                                   struct ieee80211_key_seq *seq)
1456 {
1457         u64 pn;
1458
1459         pn = le64_to_cpu(sc->pn);
1460         seq->ccmp.pn[0] = pn >> 40;
1461         seq->ccmp.pn[1] = pn >> 32;
1462         seq->ccmp.pn[2] = pn >> 24;
1463         seq->ccmp.pn[3] = pn >> 16;
1464         seq->ccmp.pn[4] = pn >> 8;
1465         seq->ccmp.pn[5] = pn;
1466 }
1467
1468 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1469                                    struct ieee80211_key_seq *seq)
1470 {
1471         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1472         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1473 }
1474
1475 static void iwl_mvm_set_aes_rx_seq(struct iwl_mvm *mvm, struct aes_sc *scs,
1476                                    struct ieee80211_sta *sta,
1477                                    struct ieee80211_key_conf *key)
1478 {
1479         int tid;
1480
1481         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1482
1483         if (sta && iwl_mvm_has_new_rx_api(mvm)) {
1484                 struct iwl_mvm_sta *mvmsta;
1485                 struct iwl_mvm_key_pn *ptk_pn;
1486
1487                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1488
1489                 ptk_pn = rcu_dereference_protected(mvmsta->ptk_pn[key->keyidx],
1490                                                    lockdep_is_held(&mvm->mutex));
1491                 if (WARN_ON(!ptk_pn))
1492                         return;
1493
1494                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1495                         struct ieee80211_key_seq seq = {};
1496                         int i;
1497
1498                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1499                         ieee80211_set_key_rx_seq(key, tid, &seq);
1500                         for (i = 1; i < mvm->trans->num_rx_queues; i++)
1501                                 memcpy(ptk_pn->q[i].pn[tid],
1502                                        seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
1503                 }
1504         } else {
1505                 for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1506                         struct ieee80211_key_seq seq = {};
1507
1508                         iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1509                         ieee80211_set_key_rx_seq(key, tid, &seq);
1510                 }
1511         }
1512 }
1513
1514 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1515                                     struct ieee80211_key_conf *key)
1516 {
1517         int tid;
1518
1519         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1520
1521         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1522                 struct ieee80211_key_seq seq = {};
1523
1524                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1525                 ieee80211_set_key_rx_seq(key, tid, &seq);
1526         }
1527 }
1528
1529 static void iwl_mvm_set_key_rx_seq(struct iwl_mvm *mvm,
1530                                    struct ieee80211_key_conf *key,
1531                                    struct iwl_wowlan_status *status)
1532 {
1533         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1534
1535         switch (key->cipher) {
1536         case WLAN_CIPHER_SUITE_CCMP:
1537                 iwl_mvm_set_aes_rx_seq(mvm, rsc->aes.multicast_rsc, NULL, key);
1538                 break;
1539         case WLAN_CIPHER_SUITE_TKIP:
1540                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1541                 break;
1542         default:
1543                 WARN_ON(1);
1544         }
1545 }
1546
1547 struct iwl_mvm_d3_gtk_iter_data {
1548         struct iwl_mvm *mvm;
1549         struct iwl_wowlan_status *status;
1550         void *last_gtk;
1551         u32 cipher;
1552         bool find_phase, unhandled_cipher;
1553         int num_keys;
1554 };
1555
1556 static void iwl_mvm_d3_update_keys(struct ieee80211_hw *hw,
1557                                    struct ieee80211_vif *vif,
1558                                    struct ieee80211_sta *sta,
1559                                    struct ieee80211_key_conf *key,
1560                                    void *_data)
1561 {
1562         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1563
1564         if (data->unhandled_cipher)
1565                 return;
1566
1567         switch (key->cipher) {
1568         case WLAN_CIPHER_SUITE_WEP40:
1569         case WLAN_CIPHER_SUITE_WEP104:
1570                 /* ignore WEP completely, nothing to do */
1571                 return;
1572         case WLAN_CIPHER_SUITE_CCMP:
1573         case WLAN_CIPHER_SUITE_TKIP:
1574                 /* we support these */
1575                 break;
1576         default:
1577                 /* everything else (even CMAC for MFP) - disconnect from AP */
1578                 data->unhandled_cipher = true;
1579                 return;
1580         }
1581
1582         data->num_keys++;
1583
1584         /*
1585          * pairwise key - update sequence counters only;
1586          * note that this assumes no TDLS sessions are active
1587          */
1588         if (sta) {
1589                 struct ieee80211_key_seq seq = {};
1590                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1591
1592                 if (data->find_phase)
1593                         return;
1594
1595                 switch (key->cipher) {
1596                 case WLAN_CIPHER_SUITE_CCMP:
1597                         iwl_mvm_set_aes_rx_seq(data->mvm, sc->aes.unicast_rsc,
1598                                                sta, key);
1599                         atomic64_set(&key->tx_pn, le64_to_cpu(sc->aes.tsc.pn));
1600                         break;
1601                 case WLAN_CIPHER_SUITE_TKIP:
1602                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1603                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1604                         ieee80211_set_key_tx_seq(key, &seq);
1605                         break;
1606                 }
1607
1608                 /* that's it for this key */
1609                 return;
1610         }
1611
1612         if (data->find_phase) {
1613                 data->last_gtk = key;
1614                 data->cipher = key->cipher;
1615                 return;
1616         }
1617
1618         if (data->status->num_of_gtk_rekeys)
1619                 ieee80211_remove_key(key);
1620         else if (data->last_gtk == key)
1621                 iwl_mvm_set_key_rx_seq(data->mvm, key, data->status);
1622 }
1623
1624 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1625                                           struct ieee80211_vif *vif,
1626                                           struct iwl_wowlan_status *status)
1627 {
1628         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1629         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1630                 .mvm = mvm,
1631                 .status = status,
1632         };
1633         u32 disconnection_reasons =
1634                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1635                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1636
1637         if (!status || !vif->bss_conf.bssid)
1638                 return false;
1639
1640         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1641                 return false;
1642
1643         /* find last GTK that we used initially, if any */
1644         gtkdata.find_phase = true;
1645         ieee80211_iter_keys(mvm->hw, vif,
1646                             iwl_mvm_d3_update_keys, &gtkdata);
1647         /* not trying to keep connections with MFP/unhandled ciphers */
1648         if (gtkdata.unhandled_cipher)
1649                 return false;
1650         if (!gtkdata.num_keys)
1651                 goto out;
1652         if (!gtkdata.last_gtk)
1653                 return false;
1654
1655         /*
1656          * invalidate all other GTKs that might still exist and update
1657          * the one that we used
1658          */
1659         gtkdata.find_phase = false;
1660         ieee80211_iter_keys(mvm->hw, vif,
1661                             iwl_mvm_d3_update_keys, &gtkdata);
1662
1663         if (status->num_of_gtk_rekeys) {
1664                 struct ieee80211_key_conf *key;
1665                 struct {
1666                         struct ieee80211_key_conf conf;
1667                         u8 key[32];
1668                 } conf = {
1669                         .conf.cipher = gtkdata.cipher,
1670                         .conf.keyidx = status->gtk.key_index,
1671                 };
1672
1673                 switch (gtkdata.cipher) {
1674                 case WLAN_CIPHER_SUITE_CCMP:
1675                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1676                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1677                                WLAN_KEY_LEN_CCMP);
1678                         break;
1679                 case WLAN_CIPHER_SUITE_TKIP:
1680                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1681                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1682                         /* leave TX MIC key zeroed, we don't use it anyway */
1683                         memcpy(conf.conf.key +
1684                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1685                                status->gtk.tkip_mic_key, 8);
1686                         break;
1687                 }
1688
1689                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1690                 if (IS_ERR(key))
1691                         return false;
1692                 iwl_mvm_set_key_rx_seq(mvm, key, status);
1693         }
1694
1695         if (status->num_of_gtk_rekeys) {
1696                 __be64 replay_ctr =
1697                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1698                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1699                                            (void *)&replay_ctr, GFP_KERNEL);
1700         }
1701
1702 out:
1703         mvmvif->seqno_valid = true;
1704         /* +0x10 because the set API expects next-to-use, not last-used */
1705         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1706
1707         return true;
1708 }
1709
1710 static struct iwl_wowlan_status *
1711 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1712 {
1713         u32 base = mvm->error_event_table;
1714         struct error_table_start {
1715                 /* cf. struct iwl_error_event_table */
1716                 u32 valid;
1717                 u32 error_id;
1718         } err_info;
1719         struct iwl_host_cmd cmd = {
1720                 .id = WOWLAN_GET_STATUSES,
1721                 .flags = CMD_WANT_SKB,
1722         };
1723         struct iwl_wowlan_status *status, *fw_status;
1724         int ret, len, status_size;
1725
1726         iwl_trans_read_mem_bytes(mvm->trans, base,
1727                                  &err_info, sizeof(err_info));
1728
1729         if (err_info.valid) {
1730                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1731                          err_info.valid, err_info.error_id);
1732                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1733                         struct cfg80211_wowlan_wakeup wakeup = {
1734                                 .rfkill_release = true,
1735                         };
1736                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1737                                                        GFP_KERNEL);
1738                 }
1739                 return ERR_PTR(-EIO);
1740         }
1741
1742         /* only for tracing for now */
1743         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1744         if (ret)
1745                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1746
1747         ret = iwl_mvm_send_cmd(mvm, &cmd);
1748         if (ret) {
1749                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1750                 return ERR_PTR(ret);
1751         }
1752
1753         /* RF-kill already asserted again... */
1754         if (!cmd.resp_pkt) {
1755                 fw_status = ERR_PTR(-ERFKILL);
1756                 goto out_free_resp;
1757         }
1758
1759         status_size = sizeof(*fw_status);
1760
1761         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1762         if (len < status_size) {
1763                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1764                 fw_status = ERR_PTR(-EIO);
1765                 goto out_free_resp;
1766         }
1767
1768         status = (void *)cmd.resp_pkt->data;
1769         if (len != (status_size +
1770                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1771                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1772                 fw_status = ERR_PTR(-EIO);
1773                 goto out_free_resp;
1774         }
1775
1776         fw_status = kmemdup(status, len, GFP_KERNEL);
1777
1778 out_free_resp:
1779         iwl_free_resp(&cmd);
1780         return fw_status;
1781 }
1782
1783 /* releases the MVM mutex */
1784 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1785                                          struct ieee80211_vif *vif)
1786 {
1787         struct iwl_wowlan_status_data status;
1788         struct iwl_wowlan_status *fw_status;
1789         int i;
1790         bool keep;
1791         struct ieee80211_sta *ap_sta;
1792         struct iwl_mvm_sta *mvm_ap_sta;
1793
1794         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1795         if (IS_ERR_OR_NULL(fw_status))
1796                 goto out_unlock;
1797
1798         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1799         for (i = 0; i < 8; i++)
1800                 status.qos_seq_ctr[i] =
1801                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1802         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1803         status.wake_packet_length =
1804                 le32_to_cpu(fw_status->wake_packet_length);
1805         status.wake_packet_bufsize =
1806                 le32_to_cpu(fw_status->wake_packet_bufsize);
1807         status.wake_packet = fw_status->wake_packet;
1808
1809         /* still at hard-coded place 0 for D3 image */
1810         ap_sta = rcu_dereference_protected(
1811                         mvm->fw_id_to_mac_id[0],
1812                         lockdep_is_held(&mvm->mutex));
1813         if (IS_ERR_OR_NULL(ap_sta))
1814                 goto out_free;
1815
1816         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1817         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1818                 u16 seq = status.qos_seq_ctr[i];
1819                 /* firmware stores last-used value, we store next value */
1820                 seq += 0x10;
1821                 mvm_ap_sta->tid_data[i].seq_number = seq;
1822         }
1823
1824         /* now we have all the data we need, unlock to avoid mac80211 issues */
1825         mutex_unlock(&mvm->mutex);
1826
1827         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1828
1829         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1830
1831         kfree(fw_status);
1832         return keep;
1833
1834 out_free:
1835         kfree(fw_status);
1836 out_unlock:
1837         mutex_unlock(&mvm->mutex);
1838         return false;
1839 }
1840
1841 void iwl_mvm_d0i3_update_keys(struct iwl_mvm *mvm,
1842                               struct ieee80211_vif *vif,
1843                               struct iwl_wowlan_status *status)
1844 {
1845         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1846                 .mvm = mvm,
1847                 .status = status,
1848         };
1849
1850         /*
1851          * rekey handling requires taking locks that can't be taken now.
1852          * however, d0i3 doesn't offload rekey, so we're fine.
1853          */
1854         if (WARN_ON_ONCE(status->num_of_gtk_rekeys))
1855                 return;
1856
1857         /* find last GTK that we used initially, if any */
1858         gtkdata.find_phase = true;
1859         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1860
1861         gtkdata.find_phase = false;
1862         iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1863 }
1864
1865 struct iwl_mvm_nd_query_results {
1866         u32 matched_profiles;
1867         struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1868 };
1869
1870 static int
1871 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1872                                 struct iwl_mvm_nd_query_results *results)
1873 {
1874         struct iwl_scan_offload_profiles_query *query;
1875         struct iwl_host_cmd cmd = {
1876                 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1877                 .flags = CMD_WANT_SKB,
1878         };
1879         int ret, len;
1880
1881         ret = iwl_mvm_send_cmd(mvm, &cmd);
1882         if (ret) {
1883                 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1884                 return ret;
1885         }
1886
1887         /* RF-kill already asserted again... */
1888         if (!cmd.resp_pkt) {
1889                 ret = -ERFKILL;
1890                 goto out_free_resp;
1891         }
1892
1893         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1894         if (len < sizeof(*query)) {
1895                 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1896                 ret = -EIO;
1897                 goto out_free_resp;
1898         }
1899
1900         query = (void *)cmd.resp_pkt->data;
1901
1902         results->matched_profiles = le32_to_cpu(query->matched_profiles);
1903         memcpy(results->matches, query->matches, sizeof(results->matches));
1904
1905 #ifdef CONFIG_IWLWIFI_DEBUGFS
1906         mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1907 #endif
1908
1909 out_free_resp:
1910         iwl_free_resp(&cmd);
1911         return ret;
1912 }
1913
1914 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1915                                             struct ieee80211_vif *vif)
1916 {
1917         struct cfg80211_wowlan_nd_info *net_detect = NULL;
1918         struct cfg80211_wowlan_wakeup wakeup = {
1919                 .pattern_idx = -1,
1920         };
1921         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1922         struct iwl_mvm_nd_query_results query;
1923         struct iwl_wowlan_status *fw_status;
1924         unsigned long matched_profiles;
1925         u32 reasons = 0;
1926         int i, j, n_matches, ret;
1927
1928         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1929         if (!IS_ERR_OR_NULL(fw_status)) {
1930                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1931                 kfree(fw_status);
1932         }
1933
1934         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1935                 wakeup.rfkill_release = true;
1936
1937         if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1938                 goto out;
1939
1940         ret = iwl_mvm_netdetect_query_results(mvm, &query);
1941         if (ret || !query.matched_profiles) {
1942                 wakeup_report = NULL;
1943                 goto out;
1944         }
1945
1946         matched_profiles = query.matched_profiles;
1947         if (mvm->n_nd_match_sets) {
1948                 n_matches = hweight_long(matched_profiles);
1949         } else {
1950                 IWL_ERR(mvm, "no net detect match information available\n");
1951                 n_matches = 0;
1952         }
1953
1954         net_detect = kzalloc(sizeof(*net_detect) +
1955                              (n_matches * sizeof(net_detect->matches[0])),
1956                              GFP_KERNEL);
1957         if (!net_detect || !n_matches)
1958                 goto out_report_nd;
1959
1960         for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1961                 struct iwl_scan_offload_profile_match *fw_match;
1962                 struct cfg80211_wowlan_nd_match *match;
1963                 int idx, n_channels = 0;
1964
1965                 fw_match = &query.matches[i];
1966
1967                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1968                         n_channels += hweight8(fw_match->matching_channels[j]);
1969
1970                 match = kzalloc(sizeof(*match) +
1971                                 (n_channels * sizeof(*match->channels)),
1972                                 GFP_KERNEL);
1973                 if (!match)
1974                         goto out_report_nd;
1975
1976                 net_detect->matches[net_detect->n_matches++] = match;
1977
1978                 /* We inverted the order of the SSIDs in the scan
1979                  * request, so invert the index here.
1980                  */
1981                 idx = mvm->n_nd_match_sets - i - 1;
1982                 match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
1983                 memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
1984                        match->ssid.ssid_len);
1985
1986                 if (mvm->n_nd_channels < n_channels)
1987                         continue;
1988
1989                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
1990                         if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
1991                                 match->channels[match->n_channels++] =
1992                                         mvm->nd_channels[j]->center_freq;
1993         }
1994
1995 out_report_nd:
1996         wakeup.net_detect = net_detect;
1997 out:
1998         iwl_mvm_free_nd(mvm);
1999
2000         mutex_unlock(&mvm->mutex);
2001         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
2002
2003         if (net_detect) {
2004                 for (i = 0; i < net_detect->n_matches; i++)
2005                         kfree(net_detect->matches[i]);
2006                 kfree(net_detect);
2007         }
2008 }
2009
2010 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
2011 {
2012 #ifdef CONFIG_IWLWIFI_DEBUGFS
2013         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
2014         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
2015         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
2016
2017         if (!mvm->store_d3_resume_sram)
2018                 return;
2019
2020         if (!mvm->d3_resume_sram) {
2021                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
2022                 if (!mvm->d3_resume_sram)
2023                         return;
2024         }
2025
2026         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
2027 #endif
2028 }
2029
2030 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
2031                                        struct ieee80211_vif *vif)
2032 {
2033         /* skip the one we keep connection on */
2034         if (data == vif)
2035                 return;
2036
2037         if (vif->type == NL80211_IFTYPE_STATION)
2038                 ieee80211_resume_disconnect(vif);
2039 }
2040
2041 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
2042 {
2043         struct ieee80211_vif *vif = NULL;
2044         int ret;
2045         enum iwl_d3_status d3_status;
2046         bool keep = false;
2047
2048         mutex_lock(&mvm->mutex);
2049
2050         /* get the BSS vif pointer again */
2051         vif = iwl_mvm_get_bss_vif(mvm);
2052         if (IS_ERR_OR_NULL(vif))
2053                 goto err;
2054
2055         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
2056         if (ret)
2057                 goto err;
2058
2059         if (d3_status != IWL_D3_STATUS_ALIVE) {
2060                 IWL_INFO(mvm, "Device was reset during suspend\n");
2061                 goto err;
2062         }
2063
2064         /* query SRAM first in case we want event logging */
2065         iwl_mvm_read_d3_sram(mvm);
2066
2067         /*
2068          * Query the current location and source from the D3 firmware so we
2069          * can play it back when we re-intiailize the D0 firmware
2070          */
2071         iwl_mvm_update_changed_regdom(mvm);
2072
2073         if (mvm->net_detect) {
2074                 iwl_mvm_query_netdetect_reasons(mvm, vif);
2075                 /* has unlocked the mutex, so skip that */
2076                 goto out;
2077         } else {
2078                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
2079 #ifdef CONFIG_IWLWIFI_DEBUGFS
2080                 if (keep)
2081                         mvm->keep_vif = vif;
2082 #endif
2083                 /* has unlocked the mutex, so skip that */
2084                 goto out_iterate;
2085         }
2086
2087 err:
2088         iwl_mvm_free_nd(mvm);
2089         mutex_unlock(&mvm->mutex);
2090
2091 out_iterate:
2092         if (!test)
2093                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
2094                         IEEE80211_IFACE_ITER_NORMAL,
2095                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
2096
2097 out:
2098         /* return 1 to reconfigure the device */
2099         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
2100         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
2101
2102         /* We always return 1, which causes mac80211 to do a reconfig
2103          * with IEEE80211_RECONFIG_TYPE_RESTART.  This type of
2104          * reconfig calls iwl_mvm_restart_complete(), where we unref
2105          * the IWL_MVM_REF_UCODE_DOWN, so we need to take the
2106          * reference here.
2107          */
2108         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
2109         return 1;
2110 }
2111
2112 static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
2113 {
2114         iwl_trans_resume(mvm->trans);
2115
2116         return __iwl_mvm_resume(mvm, false);
2117 }
2118
2119 static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
2120 {
2121         bool exit_now;
2122         enum iwl_d3_status d3_status;
2123         struct iwl_trans *trans = mvm->trans;
2124
2125         iwl_trans_d3_resume(trans, &d3_status, false);
2126
2127         /*
2128          * make sure to clear D0I3_DEFER_WAKEUP before
2129          * calling iwl_trans_resume(), which might wait
2130          * for d0i3 exit completion.
2131          */
2132         mutex_lock(&mvm->d0i3_suspend_mutex);
2133         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
2134         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
2135                                         &mvm->d0i3_suspend_flags);
2136         mutex_unlock(&mvm->d0i3_suspend_mutex);
2137         if (exit_now) {
2138                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
2139                 _iwl_mvm_exit_d0i3(mvm);
2140         }
2141
2142         iwl_trans_resume(trans);
2143
2144         if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
2145                 int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
2146
2147                 if (ret)
2148                         return ret;
2149                 /*
2150                  * d0i3 exit will be deferred until reconfig_complete.
2151                  * make sure there we are out of d0i3.
2152                  */
2153         }
2154         return 0;
2155 }
2156
2157 int iwl_mvm_resume(struct ieee80211_hw *hw)
2158 {
2159         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2160         int ret;
2161
2162         if (mvm->trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2163                 ret = iwl_mvm_resume_d0i3(mvm);
2164         else
2165                 ret = iwl_mvm_resume_d3(mvm);
2166
2167         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2168
2169         return ret;
2170 }
2171
2172 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2173 {
2174         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2175
2176         device_set_wakeup_enable(mvm->trans->dev, enabled);
2177 }
2178
2179 #ifdef CONFIG_IWLWIFI_DEBUGFS
2180 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2181 {
2182         struct iwl_mvm *mvm = inode->i_private;
2183         int err;
2184
2185         if (mvm->d3_test_active)
2186                 return -EBUSY;
2187
2188         file->private_data = inode->i_private;
2189
2190         ieee80211_stop_queues(mvm->hw);
2191         synchronize_net();
2192
2193         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
2194
2195         /* start pseudo D3 */
2196         rtnl_lock();
2197         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2198         rtnl_unlock();
2199         if (err > 0)
2200                 err = -EINVAL;
2201         if (err) {
2202                 ieee80211_wake_queues(mvm->hw);
2203                 return err;
2204         }
2205         mvm->d3_test_active = true;
2206         mvm->keep_vif = NULL;
2207         return 0;
2208 }
2209
2210 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2211                                     size_t count, loff_t *ppos)
2212 {
2213         struct iwl_mvm *mvm = file->private_data;
2214         u32 pme_asserted;
2215
2216         while (true) {
2217                 /* read pme_ptr if available */
2218                 if (mvm->d3_test_pme_ptr) {
2219                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
2220                                                 mvm->d3_test_pme_ptr);
2221                         if (pme_asserted)
2222                                 break;
2223                 }
2224
2225                 if (msleep_interruptible(100))
2226                         break;
2227         }
2228
2229         return 0;
2230 }
2231
2232 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2233                                               struct ieee80211_vif *vif)
2234 {
2235         /* skip the one we keep connection on */
2236         if (_data == vif)
2237                 return;
2238
2239         if (vif->type == NL80211_IFTYPE_STATION)
2240                 ieee80211_connection_loss(vif);
2241 }
2242
2243 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2244 {
2245         struct iwl_mvm *mvm = inode->i_private;
2246         int remaining_time = 10;
2247
2248         mvm->d3_test_active = false;
2249
2250         rtnl_lock();
2251         __iwl_mvm_resume(mvm, true);
2252         rtnl_unlock();
2253
2254         mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2255
2256         iwl_abort_notification_waits(&mvm->notif_wait);
2257         ieee80211_restart_hw(mvm->hw);
2258
2259         /* wait for restart and disconnect all interfaces */
2260         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2261                remaining_time > 0) {
2262                 remaining_time--;
2263                 msleep(1000);
2264         }
2265
2266         if (remaining_time == 0)
2267                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
2268
2269         ieee80211_iterate_active_interfaces_atomic(
2270                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2271                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2272
2273         ieee80211_wake_queues(mvm->hw);
2274
2275         return 0;
2276 }
2277
2278 const struct file_operations iwl_dbgfs_d3_test_ops = {
2279         .llseek = no_llseek,
2280         .open = iwl_mvm_d3_test_open,
2281         .read = iwl_mvm_d3_test_read,
2282         .release = iwl_mvm_d3_test_release,
2283 };
2284 #endif