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 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 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  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
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  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
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  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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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,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  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         read_lock_bh(&idev->lock);
 108         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 109                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 110                 idx++;
 111                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
 112                         break;
 113         }
 114         read_unlock_bh(&idev->lock);
 115
 116         mvmvif->num_target_ipv6_addrs = idx;
 117 }
 118 #endif
 119
 120 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 121                                      struct ieee80211_vif *vif, int idx)
 122 {
 123         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 124
 125         mvmvif->tx_key_idx = idx;
 126 }
 127
 128 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 129 {
 130         int i;
 131
 132         for (i = 0; i < IWL_P1K_SIZE; i++)
 133                 out[i] = cpu_to_le16(p1k[i]);
 134 }
 135
 136 struct wowlan_key_data {
 137         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 138         struct iwl_wowlan_tkip_params_cmd *tkip;
 139         bool error, use_rsc_tsc, use_tkip;
 140         int wep_key_idx;
 141 };
 142
 143 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 144                                         struct ieee80211_vif *vif,
 145                                         struct ieee80211_sta *sta,
 146                                         struct ieee80211_key_conf *key,
 147                                         void *_data)
 148 {
 149         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 150         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 151         struct wowlan_key_data *data = _data;
 152         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 153         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 154         struct iwl_p1k_cache *rx_p1ks;
 155         u8 *rx_mic_key;
 156         struct ieee80211_key_seq seq;
 157         u32 cur_rx_iv32 = 0;
 158         u16 p1k[IWL_P1K_SIZE];
 159         int ret, i;
 160
 161         mutex_lock(&mvm->mutex);
 162
 163         switch (key->cipher) {
 164         case WLAN_CIPHER_SUITE_WEP40:
 165         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 166                 struct {
 167                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 168                         struct iwl_mvm_wep_key wep_key;
 169                 } __packed wkc = {
 170                         .wep_key_cmd.mac_id_n_color =
 171                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 172                                                                 mvmvif->color)),
 173                         .wep_key_cmd.num_keys = 1,
 174                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 175                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 176                         .wep_key.key_index = key->keyidx,
 177                         .wep_key.key_size = key->keylen,
 178                 };
 179
 180                 /*
 181                  * This will fail -- the key functions don't set support
 182                  * pairwise WEP keys. However, that's better than silently
 183                  * failing WoWLAN. Or maybe not?
 184                  */
 185                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 186                         break;
 187
 188                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 189                 if (key->keyidx == mvmvif->tx_key_idx) {
 190                         /* TX key must be at offset 0 */
 191                         wkc.wep_key.key_offset = 0;
 192                 } else {
 193                         /* others start at 1 */
 194                         data->wep_key_idx++;
 195                         wkc.wep_key.key_offset = data->wep_key_idx;
 196                 }
 197
 198                 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0, sizeof(wkc), &wkc);
 199                 data->error = ret != 0;
 200
 201                 mvm->ptk_ivlen = key->iv_len;
 202                 mvm->ptk_icvlen = key->icv_len;
 203                 mvm->gtk_ivlen = key->iv_len;
 204                 mvm->gtk_icvlen = key->icv_len;
 205
 206                 /* don't upload key again */
 207                 goto out_unlock;
 208         }
 209         default:
 210                 data->error = true;
 211                 goto out_unlock;
 212         case WLAN_CIPHER_SUITE_AES_CMAC:
 213                 /*
 214                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 215                  * but we also shouldn't abort suspend due to that. It does have
 216                  * support for the IGTK key renewal, but doesn't really use the
 217                  * IGTK for anything. This means we could spuriously wake up or
 218                  * be deauthenticated, but that was considered acceptable.
 219                  */
 220                 goto out_unlock;
 221         case WLAN_CIPHER_SUITE_TKIP:
 222                 if (sta) {
 223                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 224                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 225
 226                         rx_p1ks = data->tkip->rx_uni;
 227
 228                         ieee80211_get_key_tx_seq(key, &seq);
 229                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 230                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 231
 232                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 233                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 234
 235                         memcpy(data->tkip->mic_keys.tx,
 236                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 237                                IWL_MIC_KEY_SIZE);
 238
 239                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 240                 } else {
 241                         tkip_sc =
 242                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 243                         rx_p1ks = data->tkip->rx_multi;
 244                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 245                 }
 246
 247                 /*
 248                  * For non-QoS this relies on the fact that both the uCode and
 249                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 250                  * for checking the IV in the frames.
 251                  */
 252                 for (i = 0; i < IWL_NUM_RSC; i++) {
 253                         ieee80211_get_key_rx_seq(key, i, &seq);
 254                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 255                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 256                         /* wrapping isn't allowed, AP must rekey */
 257                         if (seq.tkip.iv32 > cur_rx_iv32)
 258                                 cur_rx_iv32 = seq.tkip.iv32;
 259                 }
 260
 261                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 262                                           cur_rx_iv32, p1k);
 263                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 264                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 265                                           cur_rx_iv32 + 1, p1k);
 266                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 267
 268                 memcpy(rx_mic_key,
 269                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 270                        IWL_MIC_KEY_SIZE);
 271
 272                 data->use_tkip = true;
 273                 data->use_rsc_tsc = true;
 274                 break;
 275         case WLAN_CIPHER_SUITE_CCMP:
 276                 if (sta) {
 277                         u8 *pn = seq.ccmp.pn;
 278
 279                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 280                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 281
 282                         ieee80211_get_key_tx_seq(key, &seq);
 283                         aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
 284                                                     ((u64)pn[4] << 8) |
 285                                                     ((u64)pn[3] << 16) |
 286                                                     ((u64)pn[2] << 24) |
 287                                                     ((u64)pn[1] << 32) |
 288                                                     ((u64)pn[0] << 40));
 289                 } else {
 290                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 291                 }
 292
 293                 /*
 294                  * For non-QoS this relies on the fact that both the uCode and
 295                  * mac80211 use TID 0 for checking the IV in the frames.
 296                  */
 297                 for (i = 0; i < IWL_NUM_RSC; i++) {
 298                         u8 *pn = seq.ccmp.pn;
 299
 300                         ieee80211_get_key_rx_seq(key, i, &seq);
 301                         aes_sc->pn = cpu_to_le64((u64)pn[5] |
 302                                                  ((u64)pn[4] << 8) |
 303                                                  ((u64)pn[3] << 16) |
 304                                                  ((u64)pn[2] << 24) |
 305                                                  ((u64)pn[1] << 32) |
 306                                                  ((u64)pn[0] << 40));
 307                 }
 308                 data->use_rsc_tsc = true;
 309                 break;
 310         }
 311
 312         /*
 313          * The D3 firmware hardcodes the key offset 0 as the key it uses
 314          * to transmit packets to the AP, i.e. the PTK.
 315          */
 316         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 317                 key->hw_key_idx = 0;
 318                 mvm->ptk_ivlen = key->iv_len;
 319                 mvm->ptk_icvlen = key->icv_len;
 320         } else {
 321                 /*
 322                  * firmware only supports TSC/RSC for a single key,
 323                  * so if there are multiple keep overwriting them
 324                  * with new ones -- this relies on mac80211 doing
 325                  * list_add_tail().
 326                  */
 327                 key->hw_key_idx = 1;
 328                 mvm->gtk_ivlen = key->iv_len;
 329                 mvm->gtk_icvlen = key->icv_len;
 330         }
 331
 332         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 333         data->error = ret != 0;
 334 out_unlock:
 335         mutex_unlock(&mvm->mutex);
 336 }
 337
 338 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 339                                  struct cfg80211_wowlan *wowlan)
 340 {
 341         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 342         struct iwl_host_cmd cmd = {
 343                 .id = WOWLAN_PATTERNS,
 344                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 345         };
 346         int i, err;
 347
 348         if (!wowlan->n_patterns)
 349                 return 0;
 350
 351         cmd.len[0] = sizeof(*pattern_cmd) +
 352                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 353
 354         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 355         if (!pattern_cmd)
 356                 return -ENOMEM;
 357
 358         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 359
 360         for (i = 0; i < wowlan->n_patterns; i++) {
 361                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 362
 363                 memcpy(&pattern_cmd->patterns[i].mask,
 364                        wowlan->patterns[i].mask, mask_len);
 365                 memcpy(&pattern_cmd->patterns[i].pattern,
 366                        wowlan->patterns[i].pattern,
 367                        wowlan->patterns[i].pattern_len);
 368                 pattern_cmd->patterns[i].mask_size = mask_len;
 369                 pattern_cmd->patterns[i].pattern_size =
 370                         wowlan->patterns[i].pattern_len;
 371         }
 372
 373         cmd.data[0] = pattern_cmd;
 374         err = iwl_mvm_send_cmd(mvm, &cmd);
 375         kfree(pattern_cmd);
 376         return err;
 377 }
 378
 379 enum iwl_mvm_tcp_packet_type {
 380         MVM_TCP_TX_SYN,
 381         MVM_TCP_RX_SYNACK,
 382         MVM_TCP_TX_DATA,
 383         MVM_TCP_RX_ACK,
 384         MVM_TCP_RX_WAKE,
 385         MVM_TCP_TX_FIN,
 386 };
 387
 388 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 389 {
 390         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 391         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 392 }
 393
 394 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
 395                                      struct cfg80211_wowlan_tcp *tcp,
 396                                      void *_pkt, u8 *mask,
 397                                      __le16 *pseudo_hdr_csum,
 398                                      enum iwl_mvm_tcp_packet_type ptype)
 399 {
 400         struct {
 401                 struct ethhdr eth;
 402                 struct iphdr ip;
 403                 struct tcphdr tcp;
 404                 u8 data[];
 405         } __packed *pkt = _pkt;
 406         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 407         int i;
 408
 409         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 410         pkt->ip.version = 4;
 411         pkt->ip.ihl = 5;
 412         pkt->ip.protocol = IPPROTO_TCP;
 413
 414         switch (ptype) {
 415         case MVM_TCP_TX_SYN:
 416         case MVM_TCP_TX_DATA:
 417         case MVM_TCP_TX_FIN:
 418                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 419                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 420                 pkt->ip.ttl = 128;
 421                 pkt->ip.saddr = tcp->src;
 422                 pkt->ip.daddr = tcp->dst;
 423                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 424                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 425                 /* overwritten for TX SYN later */
 426                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 427                 pkt->tcp.window = cpu_to_be16(65000);
 428                 break;
 429         case MVM_TCP_RX_SYNACK:
 430         case MVM_TCP_RX_ACK:
 431         case MVM_TCP_RX_WAKE:
 432                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 433                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 434                 pkt->ip.saddr = tcp->dst;
 435                 pkt->ip.daddr = tcp->src;
 436                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 437                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 438                 break;
 439         default:
 440                 WARN_ON(1);
 441                 return;
 442         }
 443
 444         switch (ptype) {
 445         case MVM_TCP_TX_SYN:
 446                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 447                 memset(pkt->data, 0x01, 8);
 448                 ip_tot_len += 8;
 449                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 450                 pkt->tcp.syn = 1;
 451                 break;
 452         case MVM_TCP_TX_DATA:
 453                 ip_tot_len += tcp->payload_len;
 454                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 455                 pkt->tcp.psh = 1;
 456                 pkt->tcp.ack = 1;
 457                 break;
 458         case MVM_TCP_TX_FIN:
 459                 pkt->tcp.fin = 1;
 460                 pkt->tcp.ack = 1;
 461                 break;
 462         case MVM_TCP_RX_SYNACK:
 463                 pkt->tcp.syn = 1;
 464                 pkt->tcp.ack = 1;
 465                 break;
 466         case MVM_TCP_RX_ACK:
 467                 pkt->tcp.ack = 1;
 468                 break;
 469         case MVM_TCP_RX_WAKE:
 470                 ip_tot_len += tcp->wake_len;
 471                 pkt->tcp.psh = 1;
 472                 pkt->tcp.ack = 1;
 473                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 474                 break;
 475         }
 476
 477         switch (ptype) {
 478         case MVM_TCP_TX_SYN:
 479         case MVM_TCP_TX_DATA:
 480         case MVM_TCP_TX_FIN:
 481                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 482                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 483                 break;
 484         case MVM_TCP_RX_WAKE:
 485                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 486                         u8 tmp = tcp->wake_mask[i];
 487                         mask[i + 6] |= tmp << 6;
 488                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 489                                 mask[i + 7] = tmp >> 2;
 490                 }
 491                 /* fall through for ethernet/IP/TCP headers mask */
 492         case MVM_TCP_RX_SYNACK:
 493         case MVM_TCP_RX_ACK:
 494                 mask[0] = 0xff; /* match ethernet */
 495                 /*
 496                  * match ethernet, ip.version, ip.ihl
 497                  * the ip.ihl half byte is really masked out by firmware
 498                  */
 499                 mask[1] = 0x7f;
 500                 mask[2] = 0x80; /* match ip.protocol */
 501                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 502                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 503                 mask[5] = 0x80; /* match tcp flags */
 504                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 505                 break;
 506         };
 507
 508         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 509                                             pkt->ip.saddr, pkt->ip.daddr);
 510 }
 511
 512 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 513                                         struct ieee80211_vif *vif,
 514                                         struct cfg80211_wowlan_tcp *tcp)
 515 {
 516         struct iwl_wowlan_remote_wake_config *cfg;
 517         struct iwl_host_cmd cmd = {
 518                 .id = REMOTE_WAKE_CONFIG_CMD,
 519                 .len = { sizeof(*cfg), },
 520                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 521         };
 522         int ret;
 523
 524         if (!tcp)
 525                 return 0;
 526
 527         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 528         if (!cfg)
 529                 return -ENOMEM;
 530         cmd.data[0] = cfg;
 531
 532         cfg->max_syn_retries = 10;
 533         cfg->max_data_retries = 10;
 534         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 535         cfg->tcp_ack_timeout = 1; /* seconds */
 536
 537         /* SYN (TX) */
 538         iwl_mvm_build_tcp_packet(
 539                 vif, tcp, cfg->syn_tx.data, NULL,
 540                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 541                 MVM_TCP_TX_SYN);
 542         cfg->syn_tx.info.tcp_payload_length = 0;
 543
 544         /* SYN/ACK (RX) */
 545         iwl_mvm_build_tcp_packet(
 546                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 547                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 548                 MVM_TCP_RX_SYNACK);
 549         cfg->synack_rx.info.tcp_payload_length = 0;
 550
 551         /* KEEPALIVE/ACK (TX) */
 552         iwl_mvm_build_tcp_packet(
 553                 vif, tcp, cfg->keepalive_tx.data, NULL,
 554                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 555                 MVM_TCP_TX_DATA);
 556         cfg->keepalive_tx.info.tcp_payload_length =
 557                 cpu_to_le16(tcp->payload_len);
 558         cfg->sequence_number_offset = tcp->payload_seq.offset;
 559         /* length must be 0..4, the field is little endian */
 560         cfg->sequence_number_length = tcp->payload_seq.len;
 561         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 562         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 563         if (tcp->payload_tok.len) {
 564                 cfg->token_offset = tcp->payload_tok.offset;
 565                 cfg->token_length = tcp->payload_tok.len;
 566                 cfg->num_tokens =
 567                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 568                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 569                        tcp->tokens_size);
 570         } else {
 571                 /* set tokens to max value to almost never run out */
 572                 cfg->num_tokens = cpu_to_le16(65535);
 573         }
 574
 575         /* ACK (RX) */
 576         iwl_mvm_build_tcp_packet(
 577                 vif, tcp, cfg->keepalive_ack_rx.data,
 578                 cfg->keepalive_ack_rx.rx_mask,
 579                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 580                 MVM_TCP_RX_ACK);
 581         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 582
 583         /* WAKEUP (RX) */
 584         iwl_mvm_build_tcp_packet(
 585                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 586                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 587                 MVM_TCP_RX_WAKE);
 588         cfg->wake_rx.info.tcp_payload_length =
 589                 cpu_to_le16(tcp->wake_len);
 590
 591         /* FIN */
 592         iwl_mvm_build_tcp_packet(
 593                 vif, tcp, cfg->fin_tx.data, NULL,
 594                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 595                 MVM_TCP_TX_FIN);
 596         cfg->fin_tx.info.tcp_payload_length = 0;
 597
 598         ret = iwl_mvm_send_cmd(mvm, &cmd);
 599         kfree(cfg);
 600
 601         return ret;
 602 }
 603
 604 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 605                                 struct ieee80211_sta *ap_sta)
 606 {
 607         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 608         struct ieee80211_chanctx_conf *ctx;
 609         u8 chains_static, chains_dynamic;
 610         struct cfg80211_chan_def chandef;
 611         int ret, i;
 612         struct iwl_binding_cmd binding_cmd = {};
 613         struct iwl_time_quota_cmd quota_cmd = {};
 614         u32 status;
 615
 616         /* add back the PHY */
 617         if (WARN_ON(!mvmvif->phy_ctxt))
 618                 return -EINVAL;
 619
 620         rcu_read_lock();
 621         ctx = rcu_dereference(vif->chanctx_conf);
 622         if (WARN_ON(!ctx)) {
 623                 rcu_read_unlock();
 624                 return -EINVAL;
 625         }
 626         chandef = ctx->def;
 627         chains_static = ctx->rx_chains_static;
 628         chains_dynamic = ctx->rx_chains_dynamic;
 629         rcu_read_unlock();
 630
 631         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 632                                    chains_static, chains_dynamic);
 633         if (ret)
 634                 return ret;
 635
 636         /* add back the MAC */
 637         mvmvif->uploaded = false;
 638
 639         if (WARN_ON(!vif->bss_conf.assoc))
 640                 return -EINVAL;
 641
 642         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 643         if (ret)
 644                 return ret;
 645
 646         /* add back binding - XXX refactor? */
 647         binding_cmd.id_and_color =
 648                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 649                                                 mvmvif->phy_ctxt->color));
 650         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 651         binding_cmd.phy =
 652                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 653                                                 mvmvif->phy_ctxt->color));
 654         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 655                                                               mvmvif->color));
 656         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 657                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 658
 659         status = 0;
 660         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 661                                           sizeof(binding_cmd), &binding_cmd,
 662                                           &status);
 663         if (ret) {
 664                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 665                 return ret;
 666         }
 667
 668         if (status) {
 669                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 670                 return -EIO;
 671         }
 672
 673         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 674         if (ret)
 675                 return ret;
 676         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 677
 678         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
 679         if (ret)
 680                 return ret;
 681
 682         /* and some quota */
 683         quota_cmd.quotas[0].id_and_color =
 684                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 685                                                 mvmvif->phy_ctxt->color));
 686         quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 687         quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 688
 689         for (i = 1; i < MAX_BINDINGS; i++)
 690                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 691
 692         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 693                                    sizeof(quota_cmd), &quota_cmd);
 694         if (ret)
 695                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 696
 697         return 0;
 698 }
 699
 700 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 701                                        struct ieee80211_vif *vif)
 702 {
 703         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 704         struct iwl_nonqos_seq_query_cmd query_cmd = {
 705                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 706                 .mac_id_n_color =
 707                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 708                                                         mvmvif->color)),
 709         };
 710         struct iwl_host_cmd cmd = {
 711                 .id = NON_QOS_TX_COUNTER_CMD,
 712                 .flags = CMD_WANT_SKB,
 713         };
 714         int err;
 715         u32 size;
 716
 717         cmd.data[0] = &query_cmd;
 718         cmd.len[0] = sizeof(query_cmd);
 719
 720         err = iwl_mvm_send_cmd(mvm, &cmd);
 721         if (err)
 722                 return err;
 723
 724         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 725         if (size < sizeof(__le16)) {
 726                 err = -EINVAL;
 727         } else {
 728                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 729                 /* firmware returns next, not last-used seqno */
 730                 err = (u16) (err - 0x10);
 731         }
 732
 733         iwl_free_resp(&cmd);
 734         return err;
 735 }
 736
 737 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 738 {
 739         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 740         struct iwl_nonqos_seq_query_cmd query_cmd = {
 741                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 742                 .mac_id_n_color =
 743                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 744                                                         mvmvif->color)),
 745                 .value = cpu_to_le16(mvmvif->seqno),
 746         };
 747
 748         /* return if called during restart, not resume from D3 */
 749         if (!mvmvif->seqno_valid)
 750                 return;
 751
 752         mvmvif->seqno_valid = false;
 753
 754         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 755                                  sizeof(query_cmd), &query_cmd))
 756                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 757 }
 758
 759 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 760 {
 761         iwl_mvm_cancel_scan(mvm);
 762
 763         iwl_trans_stop_device(mvm->trans);
 764
 765         /*
 766          * Set the HW restart bit -- this is mostly true as we're
 767          * going to load new firmware and reprogram that, though
 768          * the reprogramming is going to be manual to avoid adding
 769          * all the MACs that aren't support.
 770          * We don't have to clear up everything though because the
 771          * reprogramming is manual. When we resume, we'll actually
 772          * go through a proper restart sequence again to switch
 773          * back to the runtime firmware image.
 774          */
 775         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 776
 777         /* We reprogram keys and shouldn't allocate new key indices */
 778         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 779
 780         mvm->ptk_ivlen = 0;
 781         mvm->ptk_icvlen = 0;
 782         mvm->ptk_ivlen = 0;
 783         mvm->ptk_icvlen = 0;
 784
 785         return iwl_mvm_load_d3_fw(mvm);
 786 }
 787
 788 static int
 789 iwl_mvm_send_wowlan_config_cmd(struct iwl_mvm *mvm,
 790                                const struct iwl_wowlan_config_cmd_v3 *cmd)
 791 {
 792         /* start only with the v2 part of the command */
 793         u16 cmd_len = sizeof(cmd->common);
 794
 795         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_WOWLAN_CONFIG_TID)
 796                 cmd_len = sizeof(*cmd);
 797
 798         return iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 799                                     cmd_len, cmd);
 800 }
 801
 802 static int
 803 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 804                           struct cfg80211_wowlan *wowlan,
 805                           struct iwl_wowlan_config_cmd_v3 *wowlan_config_cmd,
 806                           struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 807                           struct ieee80211_sta *ap_sta)
 808 {
 809         int ret;
 810         struct iwl_mvm_sta *mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 811
 812         /* TODO: wowlan_config_cmd->common.wowlan_ba_teardown_tids */
 813
 814         wowlan_config_cmd->common.is_11n_connection =
 815                                         ap_sta->ht_cap.ht_supported;
 816
 817         /* Query the last used seqno and set it */
 818         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 819         if (ret < 0)
 820                 return ret;
 821
 822         wowlan_config_cmd->common.non_qos_seq = cpu_to_le16(ret);
 823
 824         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &wowlan_config_cmd->common);
 825
 826         if (wowlan->disconnect)
 827                 wowlan_config_cmd->common.wakeup_filter |=
 828                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 829                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 830         if (wowlan->magic_pkt)
 831                 wowlan_config_cmd->common.wakeup_filter |=
 832                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 833         if (wowlan->gtk_rekey_failure)
 834                 wowlan_config_cmd->common.wakeup_filter |=
 835                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 836         if (wowlan->eap_identity_req)
 837                 wowlan_config_cmd->common.wakeup_filter |=
 838                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 839         if (wowlan->four_way_handshake)
 840                 wowlan_config_cmd->common.wakeup_filter |=
 841                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 842         if (wowlan->n_patterns)
 843                 wowlan_config_cmd->common.wakeup_filter |=
 844                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 845
 846         if (wowlan->rfkill_release)
 847                 wowlan_config_cmd->common.wakeup_filter |=
 848                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 849
 850         if (wowlan->tcp) {
 851                 /*
 852                  * Set the "link change" (really "link lost") flag as well
 853                  * since that implies losing the TCP connection.
 854                  */
 855                 wowlan_config_cmd->common.wakeup_filter |=
 856                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 857                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 858                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 859                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 860         }
 861
 862         return 0;
 863 }
 864
 865 static int
 866 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
 867                       struct cfg80211_wowlan *wowlan,
 868                       struct iwl_wowlan_config_cmd_v3 *wowlan_config_cmd,
 869                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 870                       struct ieee80211_sta *ap_sta)
 871 {
 872         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 873         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 874         struct wowlan_key_data key_data = {
 875                 .use_rsc_tsc = false,
 876                 .tkip = &tkip_cmd,
 877                 .use_tkip = false,
 878         };
 879         int ret;
 880
 881         ret = iwl_mvm_switch_to_d3(mvm);
 882         if (ret)
 883                 return ret;
 884
 885         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 886         if (ret)
 887                 return ret;
 888
 889         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 890         if (!key_data.rsc_tsc)
 891                 return -ENOMEM;
 892
 893         if (!iwlwifi_mod_params.sw_crypto) {
 894                 /*
 895                  * This needs to be unlocked due to lock ordering
 896                  * constraints. Since we're in the suspend path
 897                  * that isn't really a problem though.
 898                  */
 899                 mutex_unlock(&mvm->mutex);
 900                 ieee80211_iter_keys(mvm->hw, vif,
 901                                     iwl_mvm_wowlan_program_keys,
 902                                     &key_data);
 903                 mutex_lock(&mvm->mutex);
 904                 if (key_data.error) {
 905                         ret = -EIO;
 906                         goto out;
 907                 }
 908
 909                 if (key_data.use_rsc_tsc) {
 910                         struct iwl_host_cmd rsc_tsc_cmd = {
 911                                 .id = WOWLAN_TSC_RSC_PARAM,
 912                                 .data[0] = key_data.rsc_tsc,
 913                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 914                                 .len[0] = sizeof(*key_data.rsc_tsc),
 915                         };
 916
 917                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 918                         if (ret)
 919                                 goto out;
 920                 }
 921
 922                 if (key_data.use_tkip) {
 923                         ret = iwl_mvm_send_cmd_pdu(mvm,
 924                                                    WOWLAN_TKIP_PARAM,
 925                                                    0, sizeof(tkip_cmd),
 926                                                    &tkip_cmd);
 927                         if (ret)
 928                                 goto out;
 929                 }
 930
 931                 if (mvmvif->rekey_data.valid) {
 932                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 933                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 934                                NL80211_KCK_LEN);
 935                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 936                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 937                                NL80211_KEK_LEN);
 938                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 939                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 940
 941                         ret = iwl_mvm_send_cmd_pdu(mvm,
 942                                                    WOWLAN_KEK_KCK_MATERIAL, 0,
 943                                                    sizeof(kek_kck_cmd),
 944                                                    &kek_kck_cmd);
 945                         if (ret)
 946                                 goto out;
 947                 }
 948         }
 949
 950         ret = iwl_mvm_send_wowlan_config_cmd(mvm, wowlan_config_cmd);
 951         if (ret)
 952                 goto out;
 953
 954         ret = iwl_mvm_send_patterns(mvm, wowlan);
 955         if (ret)
 956                 goto out;
 957
 958         ret = iwl_mvm_send_proto_offload(mvm, vif, false, 0);
 959         if (ret)
 960                 goto out;
 961
 962         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
 963
 964 out:
 965         kfree(key_data.rsc_tsc);
 966         return ret;
 967 }
 968
 969 static int
 970 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
 971                          struct cfg80211_wowlan *wowlan,
 972                          struct cfg80211_sched_scan_request *nd_config,
 973                          struct ieee80211_vif *vif)
 974 {
 975         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {};
 976         int ret;
 977
 978         ret = iwl_mvm_switch_to_d3(mvm);
 979         if (ret)
 980                 return ret;
 981
 982         /* rfkill release can be either for wowlan or netdetect */
 983         if (wowlan->rfkill_release)
 984                 wowlan_config_cmd.common.wakeup_filter |=
 985                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 986
 987         ret = iwl_mvm_send_wowlan_config_cmd(mvm, &wowlan_config_cmd);
 988         if (ret)
 989                 return ret;
 990
 991         ret = iwl_mvm_scan_offload_start(mvm, vif, nd_config, &mvm->nd_ies);
 992
 993         return ret;
 994 }
 995
 996 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 997                              struct cfg80211_wowlan *wowlan,
 998                              bool test)
 999 {
1000         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1001         struct ieee80211_vif *vif = NULL;
1002         struct iwl_mvm_vif *mvmvif = NULL;
1003         struct ieee80211_sta *ap_sta = NULL;
1004         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1005                 /*
1006                  * Program the minimum sleep time to 10 seconds, as many
1007                  * platforms have issues processing a wakeup signal while
1008                  * still being in the process of suspending.
1009                  */
1010                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1011         };
1012         struct iwl_host_cmd d3_cfg_cmd = {
1013                 .id = D3_CONFIG_CMD,
1014                 .flags = CMD_WANT_SKB,
1015                 .data[0] = &d3_cfg_cmd_data,
1016                 .len[0] = sizeof(d3_cfg_cmd_data),
1017         };
1018         int ret;
1019         int len __maybe_unused;
1020
1021         if (!wowlan) {
1022                 /*
1023                  * mac80211 shouldn't get here, but for D3 test
1024                  * it doesn't warrant a warning
1025                  */
1026                 WARN_ON(!test);
1027                 return -EINVAL;
1028         }
1029
1030         mutex_lock(&mvm->mutex);
1031
1032         vif = iwl_mvm_get_bss_vif(mvm);
1033         if (IS_ERR_OR_NULL(vif)) {
1034                 ret = 1;
1035                 goto out_noreset;
1036         }
1037
1038         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1039
1040         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) {
1041                 /* if we're not associated, this must be netdetect */
1042                 if (!wowlan->nd_config && !mvm->nd_config) {
1043                         ret = 1;
1044                         goto out_noreset;
1045                 }
1046
1047                 ret = iwl_mvm_netdetect_config(
1048                         mvm, wowlan, wowlan->nd_config ?: mvm->nd_config, vif);
1049                 if (ret)
1050                         goto out;
1051
1052                 mvm->net_detect = true;
1053         } else {
1054                 struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {};
1055
1056                 ap_sta = rcu_dereference_protected(
1057                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1058                         lockdep_is_held(&mvm->mutex));
1059                 if (IS_ERR_OR_NULL(ap_sta)) {
1060                         ret = -EINVAL;
1061                         goto out_noreset;
1062                 }
1063
1064                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1065                                                 vif, mvmvif, ap_sta);
1066                 if (ret)
1067                         goto out_noreset;
1068                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1069                                             vif, mvmvif, ap_sta);
1070                 if (ret)
1071                         goto out;
1072
1073                 mvm->net_detect = false;
1074         }
1075
1076         ret = iwl_mvm_power_update_device(mvm);
1077         if (ret)
1078                 goto out;
1079
1080         ret = iwl_mvm_power_update_mac(mvm);
1081         if (ret)
1082                 goto out;
1083
1084 #ifdef CONFIG_IWLWIFI_DEBUGFS
1085         if (mvm->d3_wake_sysassert)
1086                 d3_cfg_cmd_data.wakeup_flags |=
1087                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1088 #endif
1089
1090         /* must be last -- this switches firmware state */
1091         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1092         if (ret)
1093                 goto out;
1094 #ifdef CONFIG_IWLWIFI_DEBUGFS
1095         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1096         if (len >= sizeof(u32)) {
1097                 mvm->d3_test_pme_ptr =
1098                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1099         }
1100 #endif
1101         iwl_free_resp(&d3_cfg_cmd);
1102
1103         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1104
1105         iwl_trans_d3_suspend(mvm->trans, test);
1106  out:
1107         if (ret < 0)
1108                 ieee80211_restart_hw(mvm->hw);
1109  out_noreset:
1110         mutex_unlock(&mvm->mutex);
1111
1112         return ret;
1113 }
1114
1115 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1116 {
1117         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1118
1119         iwl_trans_suspend(mvm->trans);
1120         if (iwl_mvm_is_d0i3_supported(mvm)) {
1121                 mutex_lock(&mvm->d0i3_suspend_mutex);
1122                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1123                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1124                 return 0;
1125         }
1126
1127         return __iwl_mvm_suspend(hw, wowlan, false);
1128 }
1129
1130 /* converted data from the different status responses */
1131 struct iwl_wowlan_status_data {
1132         u16 pattern_number;
1133         u16 qos_seq_ctr[8];
1134         u32 wakeup_reasons;
1135         u32 wake_packet_length;
1136         u32 wake_packet_bufsize;
1137         const u8 *wake_packet;
1138 };
1139
1140 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1141                                           struct ieee80211_vif *vif,
1142                                           struct iwl_wowlan_status_data *status)
1143 {
1144         struct sk_buff *pkt = NULL;
1145         struct cfg80211_wowlan_wakeup wakeup = {
1146                 .pattern_idx = -1,
1147         };
1148         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1149         u32 reasons = status->wakeup_reasons;
1150
1151         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1152                 wakeup_report = NULL;
1153                 goto report;
1154         }
1155
1156         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1157                 wakeup.magic_pkt = true;
1158
1159         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1160                 wakeup.pattern_idx =
1161                         status->pattern_number;
1162
1163         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1164                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1165                 wakeup.disconnect = true;
1166
1167         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1168                 wakeup.gtk_rekey_failure = true;
1169
1170         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1171                 wakeup.rfkill_release = true;
1172
1173         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1174                 wakeup.eap_identity_req = true;
1175
1176         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1177                 wakeup.four_way_handshake = true;
1178
1179         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1180                 wakeup.tcp_connlost = true;
1181
1182         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1183                 wakeup.tcp_nomoretokens = true;
1184
1185         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1186                 wakeup.tcp_match = true;
1187
1188         if (status->wake_packet_bufsize) {
1189                 int pktsize = status->wake_packet_bufsize;
1190                 int pktlen = status->wake_packet_length;
1191                 const u8 *pktdata = status->wake_packet;
1192                 struct ieee80211_hdr *hdr = (void *)pktdata;
1193                 int truncated = pktlen - pktsize;
1194
1195                 /* this would be a firmware bug */
1196                 if (WARN_ON_ONCE(truncated < 0))
1197                         truncated = 0;
1198
1199                 if (ieee80211_is_data(hdr->frame_control)) {
1200                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1201                         int ivlen = 0, icvlen = 4; /* also FCS */
1202
1203                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1204                         if (!pkt)
1205                                 goto report;
1206
1207                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1208                         pktdata += hdrlen;
1209                         pktsize -= hdrlen;
1210
1211                         if (ieee80211_has_protected(hdr->frame_control)) {
1212                                 /*
1213                                  * This is unlocked and using gtk_i(c)vlen,
1214                                  * but since everything is under RTNL still
1215                                  * that's not really a problem - changing
1216                                  * it would be difficult.
1217                                  */
1218                                 if (is_multicast_ether_addr(hdr->addr1)) {
1219                                         ivlen = mvm->gtk_ivlen;
1220                                         icvlen += mvm->gtk_icvlen;
1221                                 } else {
1222                                         ivlen = mvm->ptk_ivlen;
1223                                         icvlen += mvm->ptk_icvlen;
1224                                 }
1225                         }
1226
1227                         /* if truncated, FCS/ICV is (partially) gone */
1228                         if (truncated >= icvlen) {
1229                                 icvlen = 0;
1230                                 truncated -= icvlen;
1231                         } else {
1232                                 icvlen -= truncated;
1233                                 truncated = 0;
1234                         }
1235
1236                         pktsize -= ivlen + icvlen;
1237                         pktdata += ivlen;
1238
1239                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1240
1241                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1242                                 goto report;
1243                         wakeup.packet = pkt->data;
1244                         wakeup.packet_present_len = pkt->len;
1245                         wakeup.packet_len = pkt->len - truncated;
1246                         wakeup.packet_80211 = false;
1247                 } else {
1248                         int fcslen = 4;
1249
1250                         if (truncated >= 4) {
1251                                 truncated -= 4;
1252                                 fcslen = 0;
1253                         } else {
1254                                 fcslen -= truncated;
1255                                 truncated = 0;
1256                         }
1257                         pktsize -= fcslen;
1258                         wakeup.packet = status->wake_packet;
1259                         wakeup.packet_present_len = pktsize;
1260                         wakeup.packet_len = pktlen - truncated;
1261                         wakeup.packet_80211 = true;
1262                 }
1263         }
1264
1265  report:
1266         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1267         kfree_skb(pkt);
1268 }
1269
1270 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1271                                   struct ieee80211_key_seq *seq)
1272 {
1273         u64 pn;
1274
1275         pn = le64_to_cpu(sc->pn);
1276         seq->ccmp.pn[0] = pn >> 40;
1277         seq->ccmp.pn[1] = pn >> 32;
1278         seq->ccmp.pn[2] = pn >> 24;
1279         seq->ccmp.pn[3] = pn >> 16;
1280         seq->ccmp.pn[4] = pn >> 8;
1281         seq->ccmp.pn[5] = pn;
1282 }
1283
1284 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1285                                    struct ieee80211_key_seq *seq)
1286 {
1287         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1288         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1289 }
1290
1291 static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs,
1292                                    struct ieee80211_key_conf *key)
1293 {
1294         int tid;
1295
1296         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1297
1298         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1299                 struct ieee80211_key_seq seq = {};
1300
1301                 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1302                 ieee80211_set_key_rx_seq(key, tid, &seq);
1303         }
1304 }
1305
1306 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1307                                     struct ieee80211_key_conf *key)
1308 {
1309         int tid;
1310
1311         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1312
1313         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1314                 struct ieee80211_key_seq seq = {};
1315
1316                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1317                 ieee80211_set_key_rx_seq(key, tid, &seq);
1318         }
1319 }
1320
1321 static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key,
1322                                    struct iwl_wowlan_status *status)
1323 {
1324         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1325
1326         switch (key->cipher) {
1327         case WLAN_CIPHER_SUITE_CCMP:
1328                 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key);
1329                 break;
1330         case WLAN_CIPHER_SUITE_TKIP:
1331                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1332                 break;
1333         default:
1334                 WARN_ON(1);
1335         }
1336 }
1337
1338 struct iwl_mvm_d3_gtk_iter_data {
1339         struct iwl_wowlan_status *status;
1340         void *last_gtk;
1341         u32 cipher;
1342         bool find_phase, unhandled_cipher;
1343         int num_keys;
1344 };
1345
1346 static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw,
1347                                    struct ieee80211_vif *vif,
1348                                    struct ieee80211_sta *sta,
1349                                    struct ieee80211_key_conf *key,
1350                                    void *_data)
1351 {
1352         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1353
1354         if (data->unhandled_cipher)
1355                 return;
1356
1357         switch (key->cipher) {
1358         case WLAN_CIPHER_SUITE_WEP40:
1359         case WLAN_CIPHER_SUITE_WEP104:
1360                 /* ignore WEP completely, nothing to do */
1361                 return;
1362         case WLAN_CIPHER_SUITE_CCMP:
1363         case WLAN_CIPHER_SUITE_TKIP:
1364                 /* we support these */
1365                 break;
1366         default:
1367                 /* everything else (even CMAC for MFP) - disconnect from AP */
1368                 data->unhandled_cipher = true;
1369                 return;
1370         }
1371
1372         data->num_keys++;
1373
1374         /*
1375          * pairwise key - update sequence counters only;
1376          * note that this assumes no TDLS sessions are active
1377          */
1378         if (sta) {
1379                 struct ieee80211_key_seq seq = {};
1380                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1381
1382                 if (data->find_phase)
1383                         return;
1384
1385                 switch (key->cipher) {
1386                 case WLAN_CIPHER_SUITE_CCMP:
1387                         iwl_mvm_aes_sc_to_seq(&sc->aes.tsc, &seq);
1388                         iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key);
1389                         break;
1390                 case WLAN_CIPHER_SUITE_TKIP:
1391                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1392                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1393                         break;
1394                 }
1395                 ieee80211_set_key_tx_seq(key, &seq);
1396
1397                 /* that's it for this key */
1398                 return;
1399         }
1400
1401         if (data->find_phase) {
1402                 data->last_gtk = key;
1403                 data->cipher = key->cipher;
1404                 return;
1405         }
1406
1407         if (data->status->num_of_gtk_rekeys)
1408                 ieee80211_remove_key(key);
1409         else if (data->last_gtk == key)
1410                 iwl_mvm_set_key_rx_seq(key, data->status);
1411 }
1412
1413 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1414                                           struct ieee80211_vif *vif,
1415                                           struct iwl_wowlan_status *status)
1416 {
1417         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1418         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1419                 .status = status,
1420         };
1421         u32 disconnection_reasons =
1422                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1423                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1424
1425         if (!status || !vif->bss_conf.bssid)
1426                 return false;
1427
1428         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1429                 return false;
1430
1431         /* find last GTK that we used initially, if any */
1432         gtkdata.find_phase = true;
1433         ieee80211_iter_keys(mvm->hw, vif,
1434                             iwl_mvm_d3_update_gtks, &gtkdata);
1435         /* not trying to keep connections with MFP/unhandled ciphers */
1436         if (gtkdata.unhandled_cipher)
1437                 return false;
1438         if (!gtkdata.num_keys)
1439                 goto out;
1440         if (!gtkdata.last_gtk)
1441                 return false;
1442
1443         /*
1444          * invalidate all other GTKs that might still exist and update
1445          * the one that we used
1446          */
1447         gtkdata.find_phase = false;
1448         ieee80211_iter_keys(mvm->hw, vif,
1449                             iwl_mvm_d3_update_gtks, &gtkdata);
1450
1451         if (status->num_of_gtk_rekeys) {
1452                 struct ieee80211_key_conf *key;
1453                 struct {
1454                         struct ieee80211_key_conf conf;
1455                         u8 key[32];
1456                 } conf = {
1457                         .conf.cipher = gtkdata.cipher,
1458                         .conf.keyidx = status->gtk.key_index,
1459                 };
1460
1461                 switch (gtkdata.cipher) {
1462                 case WLAN_CIPHER_SUITE_CCMP:
1463                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1464                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1465                                WLAN_KEY_LEN_CCMP);
1466                         break;
1467                 case WLAN_CIPHER_SUITE_TKIP:
1468                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1469                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1470                         /* leave TX MIC key zeroed, we don't use it anyway */
1471                         memcpy(conf.conf.key +
1472                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1473                                status->gtk.tkip_mic_key, 8);
1474                         break;
1475                 }
1476
1477                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1478                 if (IS_ERR(key))
1479                         return false;
1480                 iwl_mvm_set_key_rx_seq(key, status);
1481         }
1482
1483         if (status->num_of_gtk_rekeys) {
1484                 __be64 replay_ctr =
1485                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1486                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1487                                            (void *)&replay_ctr, GFP_KERNEL);
1488         }
1489
1490 out:
1491         mvmvif->seqno_valid = true;
1492         /* +0x10 because the set API expects next-to-use, not last-used */
1493         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1494
1495         return true;
1496 }
1497
1498 static struct iwl_wowlan_status *
1499 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1500 {
1501         u32 base = mvm->error_event_table;
1502         struct error_table_start {
1503                 /* cf. struct iwl_error_event_table */
1504                 u32 valid;
1505                 u32 error_id;
1506         } err_info;
1507         struct iwl_host_cmd cmd = {
1508                 .id = WOWLAN_GET_STATUSES,
1509                 .flags = CMD_WANT_SKB,
1510         };
1511         struct iwl_wowlan_status *status, *fw_status;
1512         int ret, len, status_size;
1513
1514         iwl_trans_read_mem_bytes(mvm->trans, base,
1515                                  &err_info, sizeof(err_info));
1516
1517         if (err_info.valid) {
1518                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1519                          err_info.valid, err_info.error_id);
1520                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1521                         struct cfg80211_wowlan_wakeup wakeup = {
1522                                 .rfkill_release = true,
1523                         };
1524                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1525                                                        GFP_KERNEL);
1526                 }
1527                 return ERR_PTR(-EIO);
1528         }
1529
1530         /* only for tracing for now */
1531         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1532         if (ret)
1533                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1534
1535         ret = iwl_mvm_send_cmd(mvm, &cmd);
1536         if (ret) {
1537                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1538                 return ERR_PTR(ret);
1539         }
1540
1541         /* RF-kill already asserted again... */
1542         if (!cmd.resp_pkt) {
1543                 ret = -ERFKILL;
1544                 goto out_free_resp;
1545         }
1546
1547         status_size = sizeof(*fw_status);
1548
1549         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1550         if (len < status_size) {
1551                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1552                 ret = -EIO;
1553                 goto out_free_resp;
1554         }
1555
1556         status = (void *)cmd.resp_pkt->data;
1557         if (len != (status_size +
1558                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1559                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1560                 ret = -EIO;
1561                 goto out_free_resp;
1562         }
1563
1564         fw_status = kmemdup(status, len, GFP_KERNEL);
1565
1566 out_free_resp:
1567         iwl_free_resp(&cmd);
1568         return ret ? ERR_PTR(ret) : fw_status;
1569 }
1570
1571 /* releases the MVM mutex */
1572 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1573                                          struct ieee80211_vif *vif)
1574 {
1575         struct iwl_wowlan_status_data status;
1576         struct iwl_wowlan_status *fw_status;
1577         int i;
1578         bool keep;
1579         struct ieee80211_sta *ap_sta;
1580         struct iwl_mvm_sta *mvm_ap_sta;
1581
1582         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1583         if (IS_ERR_OR_NULL(fw_status))
1584                 goto out_unlock;
1585
1586         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1587         for (i = 0; i < 8; i++)
1588                 status.qos_seq_ctr[i] =
1589                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1590         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1591         status.wake_packet_length =
1592                 le32_to_cpu(fw_status->wake_packet_length);
1593         status.wake_packet_bufsize =
1594                 le32_to_cpu(fw_status->wake_packet_bufsize);
1595         status.wake_packet = fw_status->wake_packet;
1596
1597         /* still at hard-coded place 0 for D3 image */
1598         ap_sta = rcu_dereference_protected(
1599                         mvm->fw_id_to_mac_id[0],
1600                         lockdep_is_held(&mvm->mutex));
1601         if (IS_ERR_OR_NULL(ap_sta))
1602                 goto out_free;
1603
1604         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
1605         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1606                 u16 seq = status.qos_seq_ctr[i];
1607                 /* firmware stores last-used value, we store next value */
1608                 seq += 0x10;
1609                 mvm_ap_sta->tid_data[i].seq_number = seq;
1610         }
1611
1612         /* now we have all the data we need, unlock to avoid mac80211 issues */
1613         mutex_unlock(&mvm->mutex);
1614
1615         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1616
1617         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1618
1619         kfree(fw_status);
1620         return keep;
1621
1622 out_free:
1623         kfree(fw_status);
1624 out_unlock:
1625         mutex_unlock(&mvm->mutex);
1626         return false;
1627 }
1628
1629 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1630                                             struct ieee80211_vif *vif)
1631 {
1632         struct cfg80211_wowlan_wakeup wakeup = {
1633                 .pattern_idx = -1,
1634         };
1635         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1636         struct iwl_wowlan_status *fw_status;
1637         u32 reasons = 0;
1638
1639         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1640         if (!IS_ERR_OR_NULL(fw_status))
1641                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1642
1643         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1644                 wakeup.rfkill_release = true;
1645
1646         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1647                 /* TODO: read and check if it was netdetect */
1648                 wakeup_report = NULL;
1649         }
1650
1651         mutex_unlock(&mvm->mutex);
1652         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1653 }
1654
1655 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1656 {
1657 #ifdef CONFIG_IWLWIFI_DEBUGFS
1658         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1659         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1660         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1661
1662         if (!mvm->store_d3_resume_sram)
1663                 return;
1664
1665         if (!mvm->d3_resume_sram) {
1666                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1667                 if (!mvm->d3_resume_sram)
1668                         return;
1669         }
1670
1671         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1672 #endif
1673 }
1674
1675 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1676                                        struct ieee80211_vif *vif)
1677 {
1678         /* skip the one we keep connection on */
1679         if (data == vif)
1680                 return;
1681
1682         if (vif->type == NL80211_IFTYPE_STATION)
1683                 ieee80211_resume_disconnect(vif);
1684 }
1685
1686 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1687 {
1688         struct ieee80211_vif *vif = NULL;
1689         int ret;
1690         enum iwl_d3_status d3_status;
1691         bool keep = false;
1692
1693         mutex_lock(&mvm->mutex);
1694
1695         /* get the BSS vif pointer again */
1696         vif = iwl_mvm_get_bss_vif(mvm);
1697         if (IS_ERR_OR_NULL(vif))
1698                 goto out_unlock;
1699
1700         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1701         if (ret)
1702                 goto out_unlock;
1703
1704         if (d3_status != IWL_D3_STATUS_ALIVE) {
1705                 IWL_INFO(mvm, "Device was reset during suspend\n");
1706                 goto out_unlock;
1707         }
1708
1709         /* query SRAM first in case we want event logging */
1710         iwl_mvm_read_d3_sram(mvm);
1711
1712         if (mvm->net_detect) {
1713                 iwl_mvm_query_netdetect_reasons(mvm, vif);
1714         } else {
1715                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1716 #ifdef CONFIG_IWLWIFI_DEBUGFS
1717                 if (keep)
1718                         mvm->keep_vif = vif;
1719 #endif
1720         }
1721         /* has unlocked the mutex, so skip that */
1722         goto out;
1723
1724  out_unlock:
1725         mutex_unlock(&mvm->mutex);
1726
1727  out:
1728         if (!test)
1729                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1730                         IEEE80211_IFACE_ITER_NORMAL,
1731                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1732
1733         /* return 1 to reconfigure the device */
1734         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1735         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
1736         return 1;
1737 }
1738
1739 int iwl_mvm_resume(struct ieee80211_hw *hw)
1740 {
1741         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1742
1743         iwl_trans_resume(mvm->trans);
1744
1745         if (iwl_mvm_is_d0i3_supported(mvm))
1746                 return 0;
1747
1748         return __iwl_mvm_resume(mvm, false);
1749 }
1750
1751 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1752 {
1753         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1754
1755         device_set_wakeup_enable(mvm->trans->dev, enabled);
1756 }
1757
1758 #ifdef CONFIG_IWLWIFI_DEBUGFS
1759 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1760 {
1761         struct iwl_mvm *mvm = inode->i_private;
1762         int err;
1763
1764         if (mvm->d3_test_active)
1765                 return -EBUSY;
1766
1767         file->private_data = inode->i_private;
1768
1769         ieee80211_stop_queues(mvm->hw);
1770         synchronize_net();
1771
1772         /* start pseudo D3 */
1773         rtnl_lock();
1774         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1775         rtnl_unlock();
1776         if (err > 0)
1777                 err = -EINVAL;
1778         if (err) {
1779                 ieee80211_wake_queues(mvm->hw);
1780                 return err;
1781         }
1782         mvm->d3_test_active = true;
1783         mvm->keep_vif = NULL;
1784         return 0;
1785 }
1786
1787 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1788                                     size_t count, loff_t *ppos)
1789 {
1790         struct iwl_mvm *mvm = file->private_data;
1791         u32 pme_asserted;
1792
1793         while (true) {
1794                 /* read pme_ptr if available */
1795                 if (mvm->d3_test_pme_ptr) {
1796                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
1797                                                 mvm->d3_test_pme_ptr);
1798                         if (pme_asserted)
1799                                 break;
1800                 }
1801
1802                 if (msleep_interruptible(100))
1803                         break;
1804         }
1805
1806         return 0;
1807 }
1808
1809 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1810                                               struct ieee80211_vif *vif)
1811 {
1812         /* skip the one we keep connection on */
1813         if (_data == vif)
1814                 return;
1815
1816         if (vif->type == NL80211_IFTYPE_STATION)
1817                 ieee80211_connection_loss(vif);
1818 }
1819
1820 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1821 {
1822         struct iwl_mvm *mvm = inode->i_private;
1823         int remaining_time = 10;
1824
1825         mvm->d3_test_active = false;
1826         rtnl_lock();
1827         __iwl_mvm_resume(mvm, true);
1828         rtnl_unlock();
1829         iwl_abort_notification_waits(&mvm->notif_wait);
1830         ieee80211_restart_hw(mvm->hw);
1831
1832         /* wait for restart and disconnect all interfaces */
1833         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1834                remaining_time > 0) {
1835                 remaining_time--;
1836                 msleep(1000);
1837         }
1838
1839         if (remaining_time == 0)
1840                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1841
1842         ieee80211_iterate_active_interfaces_atomic(
1843                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1844                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
1845
1846         ieee80211_wake_queues(mvm->hw);
1847
1848         return 0;
1849 }
1850
1851 const struct file_operations iwl_dbgfs_d3_test_ops = {
1852         .llseek = no_llseek,
1853         .open = iwl_mvm_d3_test_open,
1854         .read = iwl_mvm_d3_test_read,
1855         .release = iwl_mvm_d3_test_release,
1856 };
1857 #endif