drivers/net/wireless/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 - 2013 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
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  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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  20  * along with this program; if not, write to the Free Software
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  22  * USA
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  25  * in the file called COPYING.
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  30  *
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  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  37  * modification, are permitted provided that the following conditions
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  41  *    notice, this list of conditions and the following disclaimer.
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  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63
  64 #include <linux/etherdevice.h>
  65 #include <linux/ip.h>
  66 #include <net/cfg80211.h>
  67 #include <net/ipv6.h>
  68 #include <net/tcp.h>
  69 #include "iwl-modparams.h"
  70 #include "fw-api.h"
  71 #include "mvm.h"
  72
  73 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  74                             struct ieee80211_vif *vif,
  75                             struct cfg80211_gtk_rekey_data *data)
  76 {
  77         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  78         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  79
  80         if (iwlwifi_mod_params.sw_crypto)
  81                 return;
  82
  83         mutex_lock(&mvm->mutex);
  84
  85         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  86         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  87         mvmvif->rekey_data.replay_ctr =
  88                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
  89         mvmvif->rekey_data.valid = true;
  90
  91         mutex_unlock(&mvm->mutex);
  92 }
  93
  94 #if IS_ENABLED(CONFIG_IPV6)
  95 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
  96                               struct ieee80211_vif *vif,
  97                               struct inet6_dev *idev)
  98 {
  99         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 100         struct inet6_ifaddr *ifa;
 101         int idx = 0;
 102
 103         read_lock_bh(&idev->lock);
 104         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 105                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 106                 idx++;
 107                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS)
 108                         break;
 109         }
 110         read_unlock_bh(&idev->lock);
 111
 112         mvmvif->num_target_ipv6_addrs = idx;
 113 }
 114 #endif
 115
 116 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 117                                      struct ieee80211_vif *vif, int idx)
 118 {
 119         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 120
 121         mvmvif->tx_key_idx = idx;
 122 }
 123
 124 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 125 {
 126         int i;
 127
 128         for (i = 0; i < IWL_P1K_SIZE; i++)
 129                 out[i] = cpu_to_le16(p1k[i]);
 130 }
 131
 132 struct wowlan_key_data {
 133         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 134         struct iwl_wowlan_tkip_params_cmd *tkip;
 135         bool error, use_rsc_tsc, use_tkip;
 136         int gtk_key_idx;
 137 };
 138
 139 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 140                                         struct ieee80211_vif *vif,
 141                                         struct ieee80211_sta *sta,
 142                                         struct ieee80211_key_conf *key,
 143                                         void *_data)
 144 {
 145         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 146         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 147         struct wowlan_key_data *data = _data;
 148         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 149         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 150         struct iwl_p1k_cache *rx_p1ks;
 151         u8 *rx_mic_key;
 152         struct ieee80211_key_seq seq;
 153         u32 cur_rx_iv32 = 0;
 154         u16 p1k[IWL_P1K_SIZE];
 155         int ret, i;
 156
 157         mutex_lock(&mvm->mutex);
 158
 159         switch (key->cipher) {
 160         case WLAN_CIPHER_SUITE_WEP40:
 161         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 162                 struct {
 163                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 164                         struct iwl_mvm_wep_key wep_key;
 165                 } __packed wkc = {
 166                         .wep_key_cmd.mac_id_n_color =
 167                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 168                                                                 mvmvif->color)),
 169                         .wep_key_cmd.num_keys = 1,
 170                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 171                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 172                         .wep_key.key_index = key->keyidx,
 173                         .wep_key.key_size = key->keylen,
 174                 };
 175
 176                 /*
 177                  * This will fail -- the key functions don't set support
 178                  * pairwise WEP keys. However, that's better than silently
 179                  * failing WoWLAN. Or maybe not?
 180                  */
 181                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 182                         break;
 183
 184                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 185                 if (key->keyidx == mvmvif->tx_key_idx) {
 186                         /* TX key must be at offset 0 */
 187                         wkc.wep_key.key_offset = 0;
 188                 } else {
 189                         /* others start at 1 */
 190                         data->gtk_key_idx++;
 191                         wkc.wep_key.key_offset = data->gtk_key_idx;
 192                 }
 193
 194                 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
 195                                            sizeof(wkc), &wkc);
 196                 data->error = ret != 0;
 197
 198                 mvm->ptk_ivlen = key->iv_len;
 199                 mvm->ptk_icvlen = key->icv_len;
 200                 mvm->gtk_ivlen = key->iv_len;
 201                 mvm->gtk_icvlen = key->icv_len;
 202
 203                 /* don't upload key again */
 204                 goto out_unlock;
 205         }
 206         default:
 207                 data->error = true;
 208                 goto out_unlock;
 209         case WLAN_CIPHER_SUITE_AES_CMAC:
 210                 /*
 211                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 212                  * but we also shouldn't abort suspend due to that. It does have
 213                  * support for the IGTK key renewal, but doesn't really use the
 214                  * IGTK for anything. This means we could spuriously wake up or
 215                  * be deauthenticated, but that was considered acceptable.
 216                  */
 217                 goto out_unlock;
 218         case WLAN_CIPHER_SUITE_TKIP:
 219                 if (sta) {
 220                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 221                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 222
 223                         rx_p1ks = data->tkip->rx_uni;
 224
 225                         ieee80211_get_key_tx_seq(key, &seq);
 226                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 227                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 228
 229                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 230                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 231
 232                         memcpy(data->tkip->mic_keys.tx,
 233                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 234                                IWL_MIC_KEY_SIZE);
 235
 236                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 237                 } else {
 238                         tkip_sc =
 239                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 240                         rx_p1ks = data->tkip->rx_multi;
 241                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 242                 }
 243
 244                 /*
 245                  * For non-QoS this relies on the fact that both the uCode and
 246                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 247                  * for checking the IV in the frames.
 248                  */
 249                 for (i = 0; i < IWL_NUM_RSC; i++) {
 250                         ieee80211_get_key_rx_seq(key, i, &seq);
 251                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 252                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 253                         /* wrapping isn't allowed, AP must rekey */
 254                         if (seq.tkip.iv32 > cur_rx_iv32)
 255                                 cur_rx_iv32 = seq.tkip.iv32;
 256                 }
 257
 258                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 259                                           cur_rx_iv32, p1k);
 260                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 261                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 262                                           cur_rx_iv32 + 1, p1k);
 263                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 264
 265                 memcpy(rx_mic_key,
 266                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 267                        IWL_MIC_KEY_SIZE);
 268
 269                 data->use_tkip = true;
 270                 data->use_rsc_tsc = true;
 271                 break;
 272         case WLAN_CIPHER_SUITE_CCMP:
 273                 if (sta) {
 274                         u8 *pn = seq.ccmp.pn;
 275
 276                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 277                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 278
 279                         ieee80211_get_key_tx_seq(key, &seq);
 280                         aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
 281                                                     ((u64)pn[4] << 8) |
 282                                                     ((u64)pn[3] << 16) |
 283                                                     ((u64)pn[2] << 24) |
 284                                                     ((u64)pn[1] << 32) |
 285                                                     ((u64)pn[0] << 40));
 286                 } else {
 287                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 288                 }
 289
 290                 /*
 291                  * For non-QoS this relies on the fact that both the uCode and
 292                  * mac80211 use TID 0 for checking the IV in the frames.
 293                  */
 294                 for (i = 0; i < IWL_NUM_RSC; i++) {
 295                         u8 *pn = seq.ccmp.pn;
 296
 297                         ieee80211_get_key_rx_seq(key, i, &seq);
 298                         aes_sc->pn = cpu_to_le64((u64)pn[5] |
 299                                                  ((u64)pn[4] << 8) |
 300                                                  ((u64)pn[3] << 16) |
 301                                                  ((u64)pn[2] << 24) |
 302                                                  ((u64)pn[1] << 32) |
 303                                                  ((u64)pn[0] << 40));
 304                 }
 305                 data->use_rsc_tsc = true;
 306                 break;
 307         }
 308
 309         /*
 310          * The D3 firmware hardcodes the key offset 0 as the key it uses
 311          * to transmit packets to the AP, i.e. the PTK.
 312          */
 313         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 314                 key->hw_key_idx = 0;
 315                 mvm->ptk_ivlen = key->iv_len;
 316                 mvm->ptk_icvlen = key->icv_len;
 317         } else {
 318                 data->gtk_key_idx++;
 319                 key->hw_key_idx = data->gtk_key_idx;
 320                 mvm->gtk_ivlen = key->iv_len;
 321                 mvm->gtk_icvlen = key->icv_len;
 322         }
 323
 324         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 325         data->error = ret != 0;
 326 out_unlock:
 327         mutex_unlock(&mvm->mutex);
 328 }
 329
 330 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 331                                  struct cfg80211_wowlan *wowlan)
 332 {
 333         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 334         struct iwl_host_cmd cmd = {
 335                 .id = WOWLAN_PATTERNS,
 336                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 337                 .flags = CMD_SYNC,
 338         };
 339         int i, err;
 340
 341         if (!wowlan->n_patterns)
 342                 return 0;
 343
 344         cmd.len[0] = sizeof(*pattern_cmd) +
 345                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 346
 347         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 348         if (!pattern_cmd)
 349                 return -ENOMEM;
 350
 351         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 352
 353         for (i = 0; i < wowlan->n_patterns; i++) {
 354                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 355
 356                 memcpy(&pattern_cmd->patterns[i].mask,
 357                        wowlan->patterns[i].mask, mask_len);
 358                 memcpy(&pattern_cmd->patterns[i].pattern,
 359                        wowlan->patterns[i].pattern,
 360                        wowlan->patterns[i].pattern_len);
 361                 pattern_cmd->patterns[i].mask_size = mask_len;
 362                 pattern_cmd->patterns[i].pattern_size =
 363                         wowlan->patterns[i].pattern_len;
 364         }
 365
 366         cmd.data[0] = pattern_cmd;
 367         err = iwl_mvm_send_cmd(mvm, &cmd);
 368         kfree(pattern_cmd);
 369         return err;
 370 }
 371
 372 static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
 373                                       struct ieee80211_vif *vif)
 374 {
 375         struct iwl_proto_offload_cmd cmd = {};
 376 #if IS_ENABLED(CONFIG_IPV6)
 377         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 378         int i;
 379
 380         if (mvmvif->num_target_ipv6_addrs) {
 381                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_NS);
 382                 memcpy(cmd.ndp_mac_addr, vif->addr, ETH_ALEN);
 383         }
 384
 385         BUILD_BUG_ON(sizeof(cmd.target_ipv6_addr[i]) !=
 386                      sizeof(mvmvif->target_ipv6_addrs[i]));
 387
 388         for (i = 0; i < mvmvif->num_target_ipv6_addrs; i++)
 389                 memcpy(cmd.target_ipv6_addr[i],
 390                        &mvmvif->target_ipv6_addrs[i],
 391                        sizeof(cmd.target_ipv6_addr[i]));
 392 #endif
 393
 394         if (vif->bss_conf.arp_addr_cnt) {
 395                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_ARP);
 396                 cmd.host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
 397                 memcpy(cmd.arp_mac_addr, vif->addr, ETH_ALEN);
 398         }
 399
 400         if (!cmd.enabled)
 401                 return 0;
 402
 403         return iwl_mvm_send_cmd_pdu(mvm, PROT_OFFLOAD_CONFIG_CMD, CMD_SYNC,
 404                                     sizeof(cmd), &cmd);
 405 }
 406
 407 enum iwl_mvm_tcp_packet_type {
 408         MVM_TCP_TX_SYN,
 409         MVM_TCP_RX_SYNACK,
 410         MVM_TCP_TX_DATA,
 411         MVM_TCP_RX_ACK,
 412         MVM_TCP_RX_WAKE,
 413         MVM_TCP_TX_FIN,
 414 };
 415
 416 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 417 {
 418         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 419         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 420 }
 421
 422 static void iwl_mvm_build_tcp_packet(struct iwl_mvm *mvm,
 423                                      struct ieee80211_vif *vif,
 424                                      struct cfg80211_wowlan_tcp *tcp,
 425                                      void *_pkt, u8 *mask,
 426                                      __le16 *pseudo_hdr_csum,
 427                                      enum iwl_mvm_tcp_packet_type ptype)
 428 {
 429         struct {
 430                 struct ethhdr eth;
 431                 struct iphdr ip;
 432                 struct tcphdr tcp;
 433                 u8 data[];
 434         } __packed *pkt = _pkt;
 435         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 436         int i;
 437
 438         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 439         pkt->ip.version = 4;
 440         pkt->ip.ihl = 5;
 441         pkt->ip.protocol = IPPROTO_TCP;
 442
 443         switch (ptype) {
 444         case MVM_TCP_TX_SYN:
 445         case MVM_TCP_TX_DATA:
 446         case MVM_TCP_TX_FIN:
 447                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 448                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 449                 pkt->ip.ttl = 128;
 450                 pkt->ip.saddr = tcp->src;
 451                 pkt->ip.daddr = tcp->dst;
 452                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 453                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 454                 /* overwritten for TX SYN later */
 455                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 456                 pkt->tcp.window = cpu_to_be16(65000);
 457                 break;
 458         case MVM_TCP_RX_SYNACK:
 459         case MVM_TCP_RX_ACK:
 460         case MVM_TCP_RX_WAKE:
 461                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 462                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 463                 pkt->ip.saddr = tcp->dst;
 464                 pkt->ip.daddr = tcp->src;
 465                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 466                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 467                 break;
 468         default:
 469                 WARN_ON(1);
 470                 return;
 471         }
 472
 473         switch (ptype) {
 474         case MVM_TCP_TX_SYN:
 475                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 476                 memset(pkt->data, 0x01, 8);
 477                 ip_tot_len += 8;
 478                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 479                 pkt->tcp.syn = 1;
 480                 break;
 481         case MVM_TCP_TX_DATA:
 482                 ip_tot_len += tcp->payload_len;
 483                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 484                 pkt->tcp.psh = 1;
 485                 pkt->tcp.ack = 1;
 486                 break;
 487         case MVM_TCP_TX_FIN:
 488                 pkt->tcp.fin = 1;
 489                 pkt->tcp.ack = 1;
 490                 break;
 491         case MVM_TCP_RX_SYNACK:
 492                 pkt->tcp.syn = 1;
 493                 pkt->tcp.ack = 1;
 494                 break;
 495         case MVM_TCP_RX_ACK:
 496                 pkt->tcp.ack = 1;
 497                 break;
 498         case MVM_TCP_RX_WAKE:
 499                 ip_tot_len += tcp->wake_len;
 500                 pkt->tcp.psh = 1;
 501                 pkt->tcp.ack = 1;
 502                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 503                 break;
 504         }
 505
 506         switch (ptype) {
 507         case MVM_TCP_TX_SYN:
 508         case MVM_TCP_TX_DATA:
 509         case MVM_TCP_TX_FIN:
 510                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 511                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 512                 break;
 513         case MVM_TCP_RX_WAKE:
 514                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 515                         u8 tmp = tcp->wake_mask[i];
 516                         mask[i + 6] |= tmp << 6;
 517                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 518                                 mask[i + 7] = tmp >> 2;
 519                 }
 520                 /* fall through for ethernet/IP/TCP headers mask */
 521         case MVM_TCP_RX_SYNACK:
 522         case MVM_TCP_RX_ACK:
 523                 mask[0] = 0xff; /* match ethernet */
 524                 /*
 525                  * match ethernet, ip.version, ip.ihl
 526                  * the ip.ihl half byte is really masked out by firmware
 527                  */
 528                 mask[1] = 0x7f;
 529                 mask[2] = 0x80; /* match ip.protocol */
 530                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 531                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 532                 mask[5] = 0x80; /* match tcp flags */
 533                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 534                 break;
 535         };
 536
 537         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 538                                             pkt->ip.saddr, pkt->ip.daddr);
 539 }
 540
 541 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 542                                         struct ieee80211_vif *vif,
 543                                         struct cfg80211_wowlan_tcp *tcp)
 544 {
 545         struct iwl_wowlan_remote_wake_config *cfg;
 546         struct iwl_host_cmd cmd = {
 547                 .id = REMOTE_WAKE_CONFIG_CMD,
 548                 .len = { sizeof(*cfg), },
 549                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 550                 .flags = CMD_SYNC,
 551         };
 552         int ret;
 553
 554         if (!tcp)
 555                 return 0;
 556
 557         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 558         if (!cfg)
 559                 return -ENOMEM;
 560         cmd.data[0] = cfg;
 561
 562         cfg->max_syn_retries = 10;
 563         cfg->max_data_retries = 10;
 564         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 565         cfg->tcp_ack_timeout = 1; /* seconds */
 566
 567         /* SYN (TX) */
 568         iwl_mvm_build_tcp_packet(
 569                 mvm, vif, tcp, cfg->syn_tx.data, NULL,
 570                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 571                 MVM_TCP_TX_SYN);
 572         cfg->syn_tx.info.tcp_payload_length = 0;
 573
 574         /* SYN/ACK (RX) */
 575         iwl_mvm_build_tcp_packet(
 576                 mvm, vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 577                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 578                 MVM_TCP_RX_SYNACK);
 579         cfg->synack_rx.info.tcp_payload_length = 0;
 580
 581         /* KEEPALIVE/ACK (TX) */
 582         iwl_mvm_build_tcp_packet(
 583                 mvm, vif, tcp, cfg->keepalive_tx.data, NULL,
 584                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 585                 MVM_TCP_TX_DATA);
 586         cfg->keepalive_tx.info.tcp_payload_length =
 587                 cpu_to_le16(tcp->payload_len);
 588         cfg->sequence_number_offset = tcp->payload_seq.offset;
 589         /* length must be 0..4, the field is little endian */
 590         cfg->sequence_number_length = tcp->payload_seq.len;
 591         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 592         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 593         if (tcp->payload_tok.len) {
 594                 cfg->token_offset = tcp->payload_tok.offset;
 595                 cfg->token_length = tcp->payload_tok.len;
 596                 cfg->num_tokens =
 597                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 598                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 599                        tcp->tokens_size);
 600         } else {
 601                 /* set tokens to max value to almost never run out */
 602                 cfg->num_tokens = cpu_to_le16(65535);
 603         }
 604
 605         /* ACK (RX) */
 606         iwl_mvm_build_tcp_packet(
 607                 mvm, vif, tcp, cfg->keepalive_ack_rx.data,
 608                 cfg->keepalive_ack_rx.rx_mask,
 609                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 610                 MVM_TCP_RX_ACK);
 611         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 612
 613         /* WAKEUP (RX) */
 614         iwl_mvm_build_tcp_packet(
 615                 mvm, vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 616                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 617                 MVM_TCP_RX_WAKE);
 618         cfg->wake_rx.info.tcp_payload_length =
 619                 cpu_to_le16(tcp->wake_len);
 620
 621         /* FIN */
 622         iwl_mvm_build_tcp_packet(
 623                 mvm, vif, tcp, cfg->fin_tx.data, NULL,
 624                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 625                 MVM_TCP_TX_FIN);
 626         cfg->fin_tx.info.tcp_payload_length = 0;
 627
 628         ret = iwl_mvm_send_cmd(mvm, &cmd);
 629         kfree(cfg);
 630
 631         return ret;
 632 }
 633
 634 struct iwl_d3_iter_data {
 635         struct iwl_mvm *mvm;
 636         struct ieee80211_vif *vif;
 637         bool error;
 638 };
 639
 640 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
 641                                       struct ieee80211_vif *vif)
 642 {
 643         struct iwl_d3_iter_data *data = _data;
 644         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 645
 646         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 647                 return;
 648
 649         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 650                 return;
 651
 652         if (data->vif) {
 653                 IWL_ERR(data->mvm, "More than one managed interface active!\n");
 654                 data->error = true;
 655                 return;
 656         }
 657
 658         data->vif = vif;
 659 }
 660
 661 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 662                                 struct ieee80211_sta *ap_sta)
 663 {
 664         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 665         struct ieee80211_chanctx_conf *ctx;
 666         u8 chains_static, chains_dynamic;
 667         struct cfg80211_chan_def chandef;
 668         int ret, i;
 669         struct iwl_binding_cmd binding_cmd = {};
 670         struct iwl_time_quota_cmd quota_cmd = {};
 671         u32 status;
 672
 673         /* add back the PHY */
 674         if (WARN_ON(!mvmvif->phy_ctxt))
 675                 return -EINVAL;
 676
 677         rcu_read_lock();
 678         ctx = rcu_dereference(vif->chanctx_conf);
 679         if (WARN_ON(!ctx)) {
 680                 rcu_read_unlock();
 681                 return -EINVAL;
 682         }
 683         chandef = ctx->def;
 684         chains_static = ctx->rx_chains_static;
 685         chains_dynamic = ctx->rx_chains_dynamic;
 686         rcu_read_unlock();
 687
 688         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 689                                    chains_static, chains_dynamic);
 690         if (ret)
 691                 return ret;
 692
 693         /* add back the MAC */
 694         mvmvif->uploaded = false;
 695
 696         if (WARN_ON(!vif->bss_conf.assoc))
 697                 return -EINVAL;
 698         /* hack */
 699         vif->bss_conf.assoc = false;
 700         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 701         vif->bss_conf.assoc = true;
 702         if (ret)
 703                 return ret;
 704
 705         /* add back binding - XXX refactor? */
 706         binding_cmd.id_and_color =
 707                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 708                                                 mvmvif->phy_ctxt->color));
 709         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 710         binding_cmd.phy =
 711                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 712                                                 mvmvif->phy_ctxt->color));
 713         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 714                                                               mvmvif->color));
 715         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 716                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 717
 718         status = 0;
 719         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 720                                           sizeof(binding_cmd), &binding_cmd,
 721                                           &status);
 722         if (ret) {
 723                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 724                 return ret;
 725         }
 726
 727         if (status) {
 728                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 729                 return -EIO;
 730         }
 731
 732         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 733         if (ret)
 734                 return ret;
 735         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 736
 737         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 738         if (ret)
 739                 return ret;
 740
 741         /* and some quota */
 742         quota_cmd.quotas[0].id_and_color =
 743                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 744                                                 mvmvif->phy_ctxt->color));
 745         quota_cmd.quotas[0].quota = cpu_to_le32(100);
 746         quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
 747
 748         for (i = 1; i < MAX_BINDINGS; i++)
 749                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 750
 751         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 752                                    sizeof(quota_cmd), &quota_cmd);
 753         if (ret)
 754                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 755
 756         return 0;
 757 }
 758
 759 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 760 {
 761         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 762         struct iwl_d3_iter_data suspend_iter_data = {
 763                 .mvm = mvm,
 764         };
 765         struct ieee80211_vif *vif;
 766         struct iwl_mvm_vif *mvmvif;
 767         struct ieee80211_sta *ap_sta;
 768         struct iwl_mvm_sta *mvm_ap_sta;
 769         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 770         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 771         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 772         struct iwl_d3_manager_config d3_cfg_cmd = {};
 773         struct wowlan_key_data key_data = {
 774                 .use_rsc_tsc = false,
 775                 .tkip = &tkip_cmd,
 776                 .use_tkip = false,
 777         };
 778         int ret, i;
 779         u16 seq;
 780         u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
 781
 782         if (WARN_ON(!wowlan))
 783                 return -EINVAL;
 784
 785         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 786         if (!key_data.rsc_tsc)
 787                 return -ENOMEM;
 788
 789         mutex_lock(&mvm->mutex);
 790
 791         old_aux_sta_id = mvm->aux_sta.sta_id;
 792
 793         /* see if there's only a single BSS vif and it's associated */
 794         ieee80211_iterate_active_interfaces_atomic(
 795                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 796                 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
 797
 798         if (suspend_iter_data.error || !suspend_iter_data.vif) {
 799                 ret = 1;
 800                 goto out_noreset;
 801         }
 802
 803         vif = suspend_iter_data.vif;
 804         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 805
 806         ap_sta = rcu_dereference_protected(
 807                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 808                         lockdep_is_held(&mvm->mutex));
 809         if (IS_ERR_OR_NULL(ap_sta)) {
 810                 ret = -EINVAL;
 811                 goto out_noreset;
 812         }
 813
 814         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 815
 816         /*
 817          * The D3 firmware still hardcodes the AP station ID for the
 818          * BSS we're associated with as 0. Store the real STA ID here
 819          * and assign 0. When we leave this function, we'll restore
 820          * the original value for the resume code.
 821          */
 822         old_ap_sta_id = mvm_ap_sta->sta_id;
 823         mvm_ap_sta->sta_id = 0;
 824         mvmvif->ap_sta_id = 0;
 825
 826         /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
 827
 828         wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
 829
 830         /*
 831          * We know the last used seqno, and the uCode expects to know that
 832          * one, it will increment before TX.
 833          */
 834         seq = mvm_ap_sta->last_seq_ctl & IEEE80211_SCTL_SEQ;
 835         wowlan_config_cmd.non_qos_seq = cpu_to_le16(seq);
 836
 837         /*
 838          * For QoS counters, we store the one to use next, so subtract 0x10
 839          * since the uCode will add 0x10 *before* using the value while we
 840          * increment after using the value (i.e. store the next value to use).
 841          */
 842         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 843                 seq = mvm_ap_sta->tid_data[i].seq_number;
 844                 seq -= 0x10;
 845                 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
 846         }
 847
 848         if (wowlan->disconnect)
 849                 wowlan_config_cmd.wakeup_filter |=
 850                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 851                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 852         if (wowlan->magic_pkt)
 853                 wowlan_config_cmd.wakeup_filter |=
 854                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 855         if (wowlan->gtk_rekey_failure)
 856                 wowlan_config_cmd.wakeup_filter |=
 857                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 858         if (wowlan->eap_identity_req)
 859                 wowlan_config_cmd.wakeup_filter |=
 860                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 861         if (wowlan->four_way_handshake)
 862                 wowlan_config_cmd.wakeup_filter |=
 863                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 864         if (wowlan->n_patterns)
 865                 wowlan_config_cmd.wakeup_filter |=
 866                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 867
 868         if (wowlan->rfkill_release)
 869                 wowlan_config_cmd.wakeup_filter |=
 870                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 871
 872         if (wowlan->tcp) {
 873                 /*
 874                  * Set the "link change" (really "link lost") flag as well
 875                  * since that implies losing the TCP connection.
 876                  */
 877                 wowlan_config_cmd.wakeup_filter |=
 878                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 879                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 880                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 881                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 882         }
 883
 884         iwl_mvm_cancel_scan(mvm);
 885
 886         iwl_trans_stop_device(mvm->trans);
 887
 888         /*
 889          * Set the HW restart bit -- this is mostly true as we're
 890          * going to load new firmware and reprogram that, though
 891          * the reprogramming is going to be manual to avoid adding
 892          * all the MACs that aren't support.
 893          * We don't have to clear up everything though because the
 894          * reprogramming is manual. When we resume, we'll actually
 895          * go through a proper restart sequence again to switch
 896          * back to the runtime firmware image.
 897          */
 898         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 899
 900         /* We reprogram keys and shouldn't allocate new key indices */
 901         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 902
 903         mvm->ptk_ivlen = 0;
 904         mvm->ptk_icvlen = 0;
 905         mvm->ptk_ivlen = 0;
 906         mvm->ptk_icvlen = 0;
 907
 908         /*
 909          * The D3 firmware still hardcodes the AP station ID for the
 910          * BSS we're associated with as 0. As a result, we have to move
 911          * the auxiliary station to ID 1 so the ID 0 remains free for
 912          * the AP station for later.
 913          * We set the sta_id to 1 here, and reset it to its previous
 914          * value (that we stored above) later.
 915          */
 916         mvm->aux_sta.sta_id = 1;
 917
 918         ret = iwl_mvm_load_d3_fw(mvm);
 919         if (ret)
 920                 goto out;
 921
 922         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 923         if (ret)
 924                 goto out;
 925
 926         if (!iwlwifi_mod_params.sw_crypto) {
 927                 /*
 928                  * This needs to be unlocked due to lock ordering
 929                  * constraints. Since we're in the suspend path
 930                  * that isn't really a problem though.
 931                  */
 932                 mutex_unlock(&mvm->mutex);
 933                 ieee80211_iter_keys(mvm->hw, vif,
 934                                     iwl_mvm_wowlan_program_keys,
 935                                     &key_data);
 936                 mutex_lock(&mvm->mutex);
 937                 if (key_data.error) {
 938                         ret = -EIO;
 939                         goto out;
 940                 }
 941
 942                 if (key_data.use_rsc_tsc) {
 943                         struct iwl_host_cmd rsc_tsc_cmd = {
 944                                 .id = WOWLAN_TSC_RSC_PARAM,
 945                                 .flags = CMD_SYNC,
 946                                 .data[0] = key_data.rsc_tsc,
 947                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 948                                 .len[0] = sizeof(*key_data.rsc_tsc),
 949                         };
 950
 951                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 952                         if (ret)
 953                                 goto out;
 954                 }
 955
 956                 if (key_data.use_tkip) {
 957                         ret = iwl_mvm_send_cmd_pdu(mvm,
 958                                                    WOWLAN_TKIP_PARAM,
 959                                                    CMD_SYNC, sizeof(tkip_cmd),
 960                                                    &tkip_cmd);
 961                         if (ret)
 962                                 goto out;
 963                 }
 964
 965                 if (mvmvif->rekey_data.valid) {
 966                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 967                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 968                                NL80211_KCK_LEN);
 969                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 970                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 971                                NL80211_KEK_LEN);
 972                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 973                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 974
 975                         ret = iwl_mvm_send_cmd_pdu(mvm,
 976                                                    WOWLAN_KEK_KCK_MATERIAL,
 977                                                    CMD_SYNC,
 978                                                    sizeof(kek_kck_cmd),
 979                                                    &kek_kck_cmd);
 980                         if (ret)
 981                                 goto out;
 982                 }
 983         }
 984
 985         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
 986                                    CMD_SYNC, sizeof(wowlan_config_cmd),
 987                                    &wowlan_config_cmd);
 988         if (ret)
 989                 goto out;
 990
 991         ret = iwl_mvm_send_patterns(mvm, wowlan);
 992         if (ret)
 993                 goto out;
 994
 995         ret = iwl_mvm_send_proto_offload(mvm, vif);
 996         if (ret)
 997                 goto out;
 998
 999         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1000         if (ret)
1001                 goto out;
1002
1003         /* must be last -- this switches firmware state */
1004         ret = iwl_mvm_send_cmd_pdu(mvm, D3_CONFIG_CMD, CMD_SYNC,
1005                                    sizeof(d3_cfg_cmd), &d3_cfg_cmd);
1006         if (ret)
1007                 goto out;
1008
1009         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1010
1011         iwl_trans_d3_suspend(mvm->trans);
1012  out:
1013         mvm->aux_sta.sta_id = old_aux_sta_id;
1014         mvm_ap_sta->sta_id = old_ap_sta_id;
1015         mvmvif->ap_sta_id = old_ap_sta_id;
1016  out_noreset:
1017         kfree(key_data.rsc_tsc);
1018         if (ret < 0)
1019                 ieee80211_restart_hw(mvm->hw);
1020
1021         mutex_unlock(&mvm->mutex);
1022
1023         return ret;
1024 }
1025
1026 static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1027                                          struct ieee80211_vif *vif)
1028 {
1029         u32 base = mvm->error_event_table;
1030         struct error_table_start {
1031                 /* cf. struct iwl_error_event_table */
1032                 u32 valid;
1033                 u32 error_id;
1034         } err_info;
1035         struct cfg80211_wowlan_wakeup wakeup = {
1036                 .pattern_idx = -1,
1037         };
1038         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1039         struct iwl_host_cmd cmd = {
1040                 .id = WOWLAN_GET_STATUSES,
1041                 .flags = CMD_SYNC | CMD_WANT_SKB,
1042         };
1043         struct iwl_wowlan_status *status;
1044         u32 reasons;
1045         int ret, len;
1046         struct sk_buff *pkt = NULL;
1047
1048         iwl_trans_read_mem_bytes(mvm->trans, base,
1049                                  &err_info, sizeof(err_info));
1050
1051         if (err_info.valid) {
1052                 IWL_INFO(mvm, "error table is valid (%d)\n",
1053                          err_info.valid);
1054                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1055                         wakeup.rfkill_release = true;
1056                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1057                                                        GFP_KERNEL);
1058                 }
1059                 return;
1060         }
1061
1062         /* only for tracing for now */
1063         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
1064         if (ret)
1065                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1066
1067         ret = iwl_mvm_send_cmd(mvm, &cmd);
1068         if (ret) {
1069                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1070                 return;
1071         }
1072
1073         /* RF-kill already asserted again... */
1074         if (!cmd.resp_pkt)
1075                 return;
1076
1077         len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1078         if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
1079                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1080                 goto out;
1081         }
1082
1083         status = (void *)cmd.resp_pkt->data;
1084
1085         if (len - sizeof(struct iwl_cmd_header) !=
1086             sizeof(*status) +
1087             ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
1088                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1089                 goto out;
1090         }
1091
1092         reasons = le32_to_cpu(status->wakeup_reasons);
1093
1094         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1095                 wakeup_report = NULL;
1096                 goto report;
1097         }
1098
1099         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1100                 wakeup.magic_pkt = true;
1101
1102         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1103                 wakeup.pattern_idx =
1104                         le16_to_cpu(status->pattern_number);
1105
1106         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1107                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1108                 wakeup.disconnect = true;
1109
1110         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1111                 wakeup.gtk_rekey_failure = true;
1112
1113         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1114                 wakeup.rfkill_release = true;
1115
1116         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1117                 wakeup.eap_identity_req = true;
1118
1119         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1120                 wakeup.four_way_handshake = true;
1121
1122         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1123                 wakeup.tcp_connlost = true;
1124
1125         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1126                 wakeup.tcp_nomoretokens = true;
1127
1128         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1129                 wakeup.tcp_match = true;
1130
1131         if (status->wake_packet_bufsize) {
1132                 int pktsize = le32_to_cpu(status->wake_packet_bufsize);
1133                 int pktlen = le32_to_cpu(status->wake_packet_length);
1134                 const u8 *pktdata = status->wake_packet;
1135                 struct ieee80211_hdr *hdr = (void *)pktdata;
1136                 int truncated = pktlen - pktsize;
1137
1138                 /* this would be a firmware bug */
1139                 if (WARN_ON_ONCE(truncated < 0))
1140                         truncated = 0;
1141
1142                 if (ieee80211_is_data(hdr->frame_control)) {
1143                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1144                         int ivlen = 0, icvlen = 4; /* also FCS */
1145
1146                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1147                         if (!pkt)
1148                                 goto report;
1149
1150                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1151                         pktdata += hdrlen;
1152                         pktsize -= hdrlen;
1153
1154                         if (ieee80211_has_protected(hdr->frame_control)) {
1155                                 if (is_multicast_ether_addr(hdr->addr1)) {
1156                                         ivlen = mvm->gtk_ivlen;
1157                                         icvlen += mvm->gtk_icvlen;
1158                                 } else {
1159                                         ivlen = mvm->ptk_ivlen;
1160                                         icvlen += mvm->ptk_icvlen;
1161                                 }
1162                         }
1163
1164                         /* if truncated, FCS/ICV is (partially) gone */
1165                         if (truncated >= icvlen) {
1166                                 icvlen = 0;
1167                                 truncated -= icvlen;
1168                         } else {
1169                                 icvlen -= truncated;
1170                                 truncated = 0;
1171                         }
1172
1173                         pktsize -= ivlen + icvlen;
1174                         pktdata += ivlen;
1175
1176                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1177
1178                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1179                                 goto report;
1180                         wakeup.packet = pkt->data;
1181                         wakeup.packet_present_len = pkt->len;
1182                         wakeup.packet_len = pkt->len - truncated;
1183                         wakeup.packet_80211 = false;
1184                 } else {
1185                         int fcslen = 4;
1186
1187                         if (truncated >= 4) {
1188                                 truncated -= 4;
1189                                 fcslen = 0;
1190                         } else {
1191                                 fcslen -= truncated;
1192                                 truncated = 0;
1193                         }
1194                         pktsize -= fcslen;
1195                         wakeup.packet = status->wake_packet;
1196                         wakeup.packet_present_len = pktsize;
1197                         wakeup.packet_len = pktlen - truncated;
1198                         wakeup.packet_80211 = true;
1199                 }
1200         }
1201
1202  report:
1203         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1204         kfree_skb(pkt);
1205
1206  out:
1207         iwl_free_resp(&cmd);
1208 }
1209
1210 int iwl_mvm_resume(struct ieee80211_hw *hw)
1211 {
1212         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1213         struct iwl_d3_iter_data resume_iter_data = {
1214                 .mvm = mvm,
1215         };
1216         struct ieee80211_vif *vif = NULL;
1217         int ret;
1218         enum iwl_d3_status d3_status;
1219
1220         mutex_lock(&mvm->mutex);
1221
1222         /* get the BSS vif pointer again */
1223         ieee80211_iterate_active_interfaces_atomic(
1224                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1225                 iwl_mvm_d3_iface_iterator, &resume_iter_data);
1226
1227         if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
1228                 goto out_unlock;
1229
1230         vif = resume_iter_data.vif;
1231
1232         ret = iwl_trans_d3_resume(mvm->trans, &d3_status);
1233         if (ret)
1234                 goto out_unlock;
1235
1236         if (d3_status != IWL_D3_STATUS_ALIVE) {
1237                 IWL_INFO(mvm, "Device was reset during suspend\n");
1238                 goto out_unlock;
1239         }
1240
1241         iwl_mvm_query_wakeup_reasons(mvm, vif);
1242
1243  out_unlock:
1244         mutex_unlock(&mvm->mutex);
1245
1246         if (vif)
1247                 ieee80211_resume_disconnect(vif);
1248
1249         /* return 1 to reconfigure the device */
1250         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1251         return 1;
1252 }
1253
1254 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1255 {
1256         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1257
1258         device_set_wakeup_enable(mvm->trans->dev, enabled);
1259 }