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 struct iwl_d3_iter_data {
 605         struct iwl_mvm *mvm;
 606         struct ieee80211_vif *vif;
 607         bool error;
 608 };
 609
 610 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
 611                                       struct ieee80211_vif *vif)
 612 {
 613         struct iwl_d3_iter_data *data = _data;
 614         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 615
 616         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 617                 return;
 618
 619         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 620                 return;
 621
 622         if (data->vif) {
 623                 IWL_ERR(data->mvm, "More than one managed interface active!\n");
 624                 data->error = true;
 625                 return;
 626         }
 627
 628         data->vif = vif;
 629 }
 630
 631 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 632                                 struct ieee80211_sta *ap_sta)
 633 {
 634         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 635         struct ieee80211_chanctx_conf *ctx;
 636         u8 chains_static, chains_dynamic;
 637         struct cfg80211_chan_def chandef;
 638         int ret, i;
 639         struct iwl_binding_cmd binding_cmd = {};
 640         struct iwl_time_quota_cmd quota_cmd = {};
 641         u32 status;
 642
 643         /* add back the PHY */
 644         if (WARN_ON(!mvmvif->phy_ctxt))
 645                 return -EINVAL;
 646
 647         rcu_read_lock();
 648         ctx = rcu_dereference(vif->chanctx_conf);
 649         if (WARN_ON(!ctx)) {
 650                 rcu_read_unlock();
 651                 return -EINVAL;
 652         }
 653         chandef = ctx->def;
 654         chains_static = ctx->rx_chains_static;
 655         chains_dynamic = ctx->rx_chains_dynamic;
 656         rcu_read_unlock();
 657
 658         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 659                                    chains_static, chains_dynamic);
 660         if (ret)
 661                 return ret;
 662
 663         /* add back the MAC */
 664         mvmvif->uploaded = false;
 665
 666         if (WARN_ON(!vif->bss_conf.assoc))
 667                 return -EINVAL;
 668
 669         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 670         if (ret)
 671                 return ret;
 672
 673         /* add back binding - XXX refactor? */
 674         binding_cmd.id_and_color =
 675                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 676                                                 mvmvif->phy_ctxt->color));
 677         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 678         binding_cmd.phy =
 679                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 680                                                 mvmvif->phy_ctxt->color));
 681         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 682                                                               mvmvif->color));
 683         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 684                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 685
 686         status = 0;
 687         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 688                                           sizeof(binding_cmd), &binding_cmd,
 689                                           &status);
 690         if (ret) {
 691                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 692                 return ret;
 693         }
 694
 695         if (status) {
 696                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 697                 return -EIO;
 698         }
 699
 700         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 701         if (ret)
 702                 return ret;
 703         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 704
 705         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
 706         if (ret)
 707                 return ret;
 708
 709         /* and some quota */
 710         quota_cmd.quotas[0].id_and_color =
 711                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 712                                                 mvmvif->phy_ctxt->color));
 713         quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 714         quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 715
 716         for (i = 1; i < MAX_BINDINGS; i++)
 717                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 718
 719         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 720                                    sizeof(quota_cmd), &quota_cmd);
 721         if (ret)
 722                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 723
 724         return 0;
 725 }
 726
 727 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 728                                        struct ieee80211_vif *vif)
 729 {
 730         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 731         struct iwl_nonqos_seq_query_cmd query_cmd = {
 732                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 733                 .mac_id_n_color =
 734                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 735                                                         mvmvif->color)),
 736         };
 737         struct iwl_host_cmd cmd = {
 738                 .id = NON_QOS_TX_COUNTER_CMD,
 739                 .flags = CMD_WANT_SKB,
 740         };
 741         int err;
 742         u32 size;
 743
 744         cmd.data[0] = &query_cmd;
 745         cmd.len[0] = sizeof(query_cmd);
 746
 747         err = iwl_mvm_send_cmd(mvm, &cmd);
 748         if (err)
 749                 return err;
 750
 751         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 752         if (size < sizeof(__le16)) {
 753                 err = -EINVAL;
 754         } else {
 755                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 756                 /* firmware returns next, not last-used seqno */
 757                 err = (u16) (err - 0x10);
 758         }
 759
 760         iwl_free_resp(&cmd);
 761         return err;
 762 }
 763
 764 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 765 {
 766         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 767         struct iwl_nonqos_seq_query_cmd query_cmd = {
 768                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 769                 .mac_id_n_color =
 770                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 771                                                         mvmvif->color)),
 772                 .value = cpu_to_le16(mvmvif->seqno),
 773         };
 774
 775         /* return if called during restart, not resume from D3 */
 776         if (!mvmvif->seqno_valid)
 777                 return;
 778
 779         mvmvif->seqno_valid = false;
 780
 781         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 782                                  sizeof(query_cmd), &query_cmd))
 783                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 784 }
 785
 786 static int
 787 iwl_mvm_send_wowlan_config_cmd(struct iwl_mvm *mvm,
 788                                const struct iwl_wowlan_config_cmd_v3 *cmd)
 789 {
 790         /* start only with the v2 part of the command */
 791         u16 cmd_len = sizeof(cmd->common);
 792
 793         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_WOWLAN_CONFIG_TID)
 794                 cmd_len = sizeof(*cmd);
 795
 796         return iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 797                                     cmd_len, cmd);
 798 }
 799
 800 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 801                              struct cfg80211_wowlan *wowlan,
 802                              bool test)
 803 {
 804         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 805         struct iwl_d3_iter_data suspend_iter_data = {
 806                 .mvm = mvm,
 807         };
 808         struct ieee80211_vif *vif;
 809         struct iwl_mvm_vif *mvmvif;
 810         struct ieee80211_sta *ap_sta;
 811         struct iwl_mvm_sta *mvm_ap_sta;
 812         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {};
 813         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 814         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 815         struct iwl_d3_manager_config d3_cfg_cmd_data = {
 816                 /*
 817                  * Program the minimum sleep time to 10 seconds, as many
 818                  * platforms have issues processing a wakeup signal while
 819                  * still being in the process of suspending.
 820                  */
 821                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
 822         };
 823         struct iwl_host_cmd d3_cfg_cmd = {
 824                 .id = D3_CONFIG_CMD,
 825                 .flags = CMD_WANT_SKB,
 826                 .data[0] = &d3_cfg_cmd_data,
 827                 .len[0] = sizeof(d3_cfg_cmd_data),
 828         };
 829         struct wowlan_key_data key_data = {
 830                 .use_rsc_tsc = false,
 831                 .tkip = &tkip_cmd,
 832                 .use_tkip = false,
 833         };
 834         int ret;
 835         int len __maybe_unused;
 836
 837         if (!wowlan) {
 838                 /*
 839                  * mac80211 shouldn't get here, but for D3 test
 840                  * it doesn't warrant a warning
 841                  */
 842                 WARN_ON(!test);
 843                 return -EINVAL;
 844         }
 845
 846         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 847         if (!key_data.rsc_tsc)
 848                 return -ENOMEM;
 849
 850         mutex_lock(&mvm->mutex);
 851
 852         /* see if there's only a single BSS vif and it's associated */
 853         ieee80211_iterate_active_interfaces_atomic(
 854                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 855                 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
 856
 857         if (suspend_iter_data.error || !suspend_iter_data.vif) {
 858                 ret = 1;
 859                 goto out_noreset;
 860         }
 861
 862         vif = suspend_iter_data.vif;
 863         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 864
 865         ap_sta = rcu_dereference_protected(
 866                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 867                         lockdep_is_held(&mvm->mutex));
 868         if (IS_ERR_OR_NULL(ap_sta)) {
 869                 ret = -EINVAL;
 870                 goto out_noreset;
 871         }
 872
 873         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 874
 875         /* TODO: wowlan_config_cmd.common.wowlan_ba_teardown_tids */
 876
 877         wowlan_config_cmd.common.is_11n_connection =
 878                                         ap_sta->ht_cap.ht_supported;
 879
 880         /* Query the last used seqno and set it */
 881         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 882         if (ret < 0)
 883                 goto out_noreset;
 884         wowlan_config_cmd.common.non_qos_seq = cpu_to_le16(ret);
 885
 886         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &wowlan_config_cmd.common);
 887
 888         if (wowlan->disconnect)
 889                 wowlan_config_cmd.common.wakeup_filter |=
 890                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 891                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 892         if (wowlan->magic_pkt)
 893                 wowlan_config_cmd.common.wakeup_filter |=
 894                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 895         if (wowlan->gtk_rekey_failure)
 896                 wowlan_config_cmd.common.wakeup_filter |=
 897                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 898         if (wowlan->eap_identity_req)
 899                 wowlan_config_cmd.common.wakeup_filter |=
 900                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 901         if (wowlan->four_way_handshake)
 902                 wowlan_config_cmd.common.wakeup_filter |=
 903                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 904         if (wowlan->n_patterns)
 905                 wowlan_config_cmd.common.wakeup_filter |=
 906                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 907
 908         if (wowlan->rfkill_release)
 909                 wowlan_config_cmd.common.wakeup_filter |=
 910                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 911
 912         if (wowlan->tcp) {
 913                 /*
 914                  * Set the "link change" (really "link lost") flag as well
 915                  * since that implies losing the TCP connection.
 916                  */
 917                 wowlan_config_cmd.common.wakeup_filter |=
 918                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 919                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 920                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 921                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 922         }
 923
 924         iwl_mvm_cancel_scan(mvm);
 925
 926         iwl_trans_stop_device(mvm->trans);
 927
 928         /*
 929          * Set the HW restart bit -- this is mostly true as we're
 930          * going to load new firmware and reprogram that, though
 931          * the reprogramming is going to be manual to avoid adding
 932          * all the MACs that aren't support.
 933          * We don't have to clear up everything though because the
 934          * reprogramming is manual. When we resume, we'll actually
 935          * go through a proper restart sequence again to switch
 936          * back to the runtime firmware image.
 937          */
 938         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 939
 940         /* We reprogram keys and shouldn't allocate new key indices */
 941         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 942
 943         mvm->ptk_ivlen = 0;
 944         mvm->ptk_icvlen = 0;
 945         mvm->ptk_ivlen = 0;
 946         mvm->ptk_icvlen = 0;
 947
 948         ret = iwl_mvm_load_d3_fw(mvm);
 949         if (ret)
 950                 goto out;
 951
 952         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 953         if (ret)
 954                 goto out;
 955
 956         if (!iwlwifi_mod_params.sw_crypto) {
 957                 /*
 958                  * This needs to be unlocked due to lock ordering
 959                  * constraints. Since we're in the suspend path
 960                  * that isn't really a problem though.
 961                  */
 962                 mutex_unlock(&mvm->mutex);
 963                 ieee80211_iter_keys(mvm->hw, vif,
 964                                     iwl_mvm_wowlan_program_keys,
 965                                     &key_data);
 966                 mutex_lock(&mvm->mutex);
 967                 if (key_data.error) {
 968                         ret = -EIO;
 969                         goto out;
 970                 }
 971
 972                 if (key_data.use_rsc_tsc) {
 973                         struct iwl_host_cmd rsc_tsc_cmd = {
 974                                 .id = WOWLAN_TSC_RSC_PARAM,
 975                                 .data[0] = key_data.rsc_tsc,
 976                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 977                                 .len[0] = sizeof(*key_data.rsc_tsc),
 978                         };
 979
 980                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 981                         if (ret)
 982                                 goto out;
 983                 }
 984
 985                 if (key_data.use_tkip) {
 986                         ret = iwl_mvm_send_cmd_pdu(mvm,
 987                                                    WOWLAN_TKIP_PARAM,
 988                                                    0, sizeof(tkip_cmd),
 989                                                    &tkip_cmd);
 990                         if (ret)
 991                                 goto out;
 992                 }
 993
 994                 if (mvmvif->rekey_data.valid) {
 995                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 996                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 997                                NL80211_KCK_LEN);
 998                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 999                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1000                                NL80211_KEK_LEN);
1001                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1002                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1003
1004                         ret = iwl_mvm_send_cmd_pdu(mvm,
1005                                                    WOWLAN_KEK_KCK_MATERIAL, 0,
1006                                                    sizeof(kek_kck_cmd),
1007                                                    &kek_kck_cmd);
1008                         if (ret)
1009                                 goto out;
1010                 }
1011         }
1012
1013         ret = iwl_mvm_send_wowlan_config_cmd(mvm, &wowlan_config_cmd);
1014         if (ret)
1015                 goto out;
1016
1017         ret = iwl_mvm_send_patterns(mvm, wowlan);
1018         if (ret)
1019                 goto out;
1020
1021         ret = iwl_mvm_send_proto_offload(mvm, vif, false, 0);
1022         if (ret)
1023                 goto out;
1024
1025         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1026         if (ret)
1027                 goto out;
1028
1029         ret = iwl_mvm_power_update_device(mvm);
1030         if (ret)
1031                 goto out;
1032
1033         ret = iwl_mvm_power_update_mac(mvm);
1034         if (ret)
1035                 goto out;
1036
1037 #ifdef CONFIG_IWLWIFI_DEBUGFS
1038         if (mvm->d3_wake_sysassert)
1039                 d3_cfg_cmd_data.wakeup_flags |=
1040                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1041 #endif
1042
1043         /* must be last -- this switches firmware state */
1044         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1045         if (ret)
1046                 goto out;
1047 #ifdef CONFIG_IWLWIFI_DEBUGFS
1048         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1049         if (len >= sizeof(u32)) {
1050                 mvm->d3_test_pme_ptr =
1051                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1052         }
1053 #endif
1054         iwl_free_resp(&d3_cfg_cmd);
1055
1056         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1057
1058         iwl_trans_d3_suspend(mvm->trans, test);
1059  out:
1060         if (ret < 0)
1061                 ieee80211_restart_hw(mvm->hw);
1062  out_noreset:
1063         kfree(key_data.rsc_tsc);
1064
1065         mutex_unlock(&mvm->mutex);
1066
1067         return ret;
1068 }
1069
1070 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1071 {
1072         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1073
1074         if (iwl_mvm_is_d0i3_supported(mvm)) {
1075                 mutex_lock(&mvm->d0i3_suspend_mutex);
1076                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1077                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1078                 return 0;
1079         }
1080
1081         return __iwl_mvm_suspend(hw, wowlan, false);
1082 }
1083
1084 /* converted data from the different status responses */
1085 struct iwl_wowlan_status_data {
1086         u16 pattern_number;
1087         u16 qos_seq_ctr[8];
1088         u32 wakeup_reasons;
1089         u32 wake_packet_length;
1090         u32 wake_packet_bufsize;
1091         const u8 *wake_packet;
1092 };
1093
1094 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1095                                           struct ieee80211_vif *vif,
1096                                           struct iwl_wowlan_status_data *status)
1097 {
1098         struct sk_buff *pkt = NULL;
1099         struct cfg80211_wowlan_wakeup wakeup = {
1100                 .pattern_idx = -1,
1101         };
1102         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1103         u32 reasons = status->wakeup_reasons;
1104
1105         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1106                 wakeup_report = NULL;
1107                 goto report;
1108         }
1109
1110         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1111                 wakeup.magic_pkt = true;
1112
1113         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1114                 wakeup.pattern_idx =
1115                         status->pattern_number;
1116
1117         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1118                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1119                 wakeup.disconnect = true;
1120
1121         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1122                 wakeup.gtk_rekey_failure = true;
1123
1124         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1125                 wakeup.rfkill_release = true;
1126
1127         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1128                 wakeup.eap_identity_req = true;
1129
1130         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1131                 wakeup.four_way_handshake = true;
1132
1133         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1134                 wakeup.tcp_connlost = true;
1135
1136         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1137                 wakeup.tcp_nomoretokens = true;
1138
1139         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1140                 wakeup.tcp_match = true;
1141
1142         if (status->wake_packet_bufsize) {
1143                 int pktsize = status->wake_packet_bufsize;
1144                 int pktlen = status->wake_packet_length;
1145                 const u8 *pktdata = status->wake_packet;
1146                 struct ieee80211_hdr *hdr = (void *)pktdata;
1147                 int truncated = pktlen - pktsize;
1148
1149                 /* this would be a firmware bug */
1150                 if (WARN_ON_ONCE(truncated < 0))
1151                         truncated = 0;
1152
1153                 if (ieee80211_is_data(hdr->frame_control)) {
1154                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1155                         int ivlen = 0, icvlen = 4; /* also FCS */
1156
1157                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1158                         if (!pkt)
1159                                 goto report;
1160
1161                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1162                         pktdata += hdrlen;
1163                         pktsize -= hdrlen;
1164
1165                         if (ieee80211_has_protected(hdr->frame_control)) {
1166                                 /*
1167                                  * This is unlocked and using gtk_i(c)vlen,
1168                                  * but since everything is under RTNL still
1169                                  * that's not really a problem - changing
1170                                  * it would be difficult.
1171                                  */
1172                                 if (is_multicast_ether_addr(hdr->addr1)) {
1173                                         ivlen = mvm->gtk_ivlen;
1174                                         icvlen += mvm->gtk_icvlen;
1175                                 } else {
1176                                         ivlen = mvm->ptk_ivlen;
1177                                         icvlen += mvm->ptk_icvlen;
1178                                 }
1179                         }
1180
1181                         /* if truncated, FCS/ICV is (partially) gone */
1182                         if (truncated >= icvlen) {
1183                                 icvlen = 0;
1184                                 truncated -= icvlen;
1185                         } else {
1186                                 icvlen -= truncated;
1187                                 truncated = 0;
1188                         }
1189
1190                         pktsize -= ivlen + icvlen;
1191                         pktdata += ivlen;
1192
1193                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1194
1195                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1196                                 goto report;
1197                         wakeup.packet = pkt->data;
1198                         wakeup.packet_present_len = pkt->len;
1199                         wakeup.packet_len = pkt->len - truncated;
1200                         wakeup.packet_80211 = false;
1201                 } else {
1202                         int fcslen = 4;
1203
1204                         if (truncated >= 4) {
1205                                 truncated -= 4;
1206                                 fcslen = 0;
1207                         } else {
1208                                 fcslen -= truncated;
1209                                 truncated = 0;
1210                         }
1211                         pktsize -= fcslen;
1212                         wakeup.packet = status->wake_packet;
1213                         wakeup.packet_present_len = pktsize;
1214                         wakeup.packet_len = pktlen - truncated;
1215                         wakeup.packet_80211 = true;
1216                 }
1217         }
1218
1219  report:
1220         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1221         kfree_skb(pkt);
1222 }
1223
1224 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1225                                   struct ieee80211_key_seq *seq)
1226 {
1227         u64 pn;
1228
1229         pn = le64_to_cpu(sc->pn);
1230         seq->ccmp.pn[0] = pn >> 40;
1231         seq->ccmp.pn[1] = pn >> 32;
1232         seq->ccmp.pn[2] = pn >> 24;
1233         seq->ccmp.pn[3] = pn >> 16;
1234         seq->ccmp.pn[4] = pn >> 8;
1235         seq->ccmp.pn[5] = pn;
1236 }
1237
1238 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1239                                    struct ieee80211_key_seq *seq)
1240 {
1241         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1242         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1243 }
1244
1245 static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs,
1246                                    struct ieee80211_key_conf *key)
1247 {
1248         int tid;
1249
1250         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1251
1252         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1253                 struct ieee80211_key_seq seq = {};
1254
1255                 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1256                 ieee80211_set_key_rx_seq(key, tid, &seq);
1257         }
1258 }
1259
1260 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1261                                     struct ieee80211_key_conf *key)
1262 {
1263         int tid;
1264
1265         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1266
1267         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1268                 struct ieee80211_key_seq seq = {};
1269
1270                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1271                 ieee80211_set_key_rx_seq(key, tid, &seq);
1272         }
1273 }
1274
1275 static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key,
1276                                    struct iwl_wowlan_status *status)
1277 {
1278         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1279
1280         switch (key->cipher) {
1281         case WLAN_CIPHER_SUITE_CCMP:
1282                 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key);
1283                 break;
1284         case WLAN_CIPHER_SUITE_TKIP:
1285                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1286                 break;
1287         default:
1288                 WARN_ON(1);
1289         }
1290 }
1291
1292 struct iwl_mvm_d3_gtk_iter_data {
1293         struct iwl_wowlan_status *status;
1294         void *last_gtk;
1295         u32 cipher;
1296         bool find_phase, unhandled_cipher;
1297         int num_keys;
1298 };
1299
1300 static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw,
1301                                    struct ieee80211_vif *vif,
1302                                    struct ieee80211_sta *sta,
1303                                    struct ieee80211_key_conf *key,
1304                                    void *_data)
1305 {
1306         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1307
1308         if (data->unhandled_cipher)
1309                 return;
1310
1311         switch (key->cipher) {
1312         case WLAN_CIPHER_SUITE_WEP40:
1313         case WLAN_CIPHER_SUITE_WEP104:
1314                 /* ignore WEP completely, nothing to do */
1315                 return;
1316         case WLAN_CIPHER_SUITE_CCMP:
1317         case WLAN_CIPHER_SUITE_TKIP:
1318                 /* we support these */
1319                 break;
1320         default:
1321                 /* everything else (even CMAC for MFP) - disconnect from AP */
1322                 data->unhandled_cipher = true;
1323                 return;
1324         }
1325
1326         data->num_keys++;
1327
1328         /*
1329          * pairwise key - update sequence counters only;
1330          * note that this assumes no TDLS sessions are active
1331          */
1332         if (sta) {
1333                 struct ieee80211_key_seq seq = {};
1334                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1335
1336                 if (data->find_phase)
1337                         return;
1338
1339                 switch (key->cipher) {
1340                 case WLAN_CIPHER_SUITE_CCMP:
1341                         iwl_mvm_aes_sc_to_seq(&sc->aes.tsc, &seq);
1342                         iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key);
1343                         break;
1344                 case WLAN_CIPHER_SUITE_TKIP:
1345                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1346                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1347                         break;
1348                 }
1349                 ieee80211_set_key_tx_seq(key, &seq);
1350
1351                 /* that's it for this key */
1352                 return;
1353         }
1354
1355         if (data->find_phase) {
1356                 data->last_gtk = key;
1357                 data->cipher = key->cipher;
1358                 return;
1359         }
1360
1361         if (data->status->num_of_gtk_rekeys)
1362                 ieee80211_remove_key(key);
1363         else if (data->last_gtk == key)
1364                 iwl_mvm_set_key_rx_seq(key, data->status);
1365 }
1366
1367 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1368                                           struct ieee80211_vif *vif,
1369                                           struct iwl_wowlan_status *status)
1370 {
1371         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1372         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1373                 .status = status,
1374         };
1375         u32 disconnection_reasons =
1376                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1377                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1378
1379         if (!status || !vif->bss_conf.bssid)
1380                 return false;
1381
1382         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1383                 return false;
1384
1385         /* find last GTK that we used initially, if any */
1386         gtkdata.find_phase = true;
1387         ieee80211_iter_keys(mvm->hw, vif,
1388                             iwl_mvm_d3_update_gtks, &gtkdata);
1389         /* not trying to keep connections with MFP/unhandled ciphers */
1390         if (gtkdata.unhandled_cipher)
1391                 return false;
1392         if (!gtkdata.num_keys)
1393                 goto out;
1394         if (!gtkdata.last_gtk)
1395                 return false;
1396
1397         /*
1398          * invalidate all other GTKs that might still exist and update
1399          * the one that we used
1400          */
1401         gtkdata.find_phase = false;
1402         ieee80211_iter_keys(mvm->hw, vif,
1403                             iwl_mvm_d3_update_gtks, &gtkdata);
1404
1405         if (status->num_of_gtk_rekeys) {
1406                 struct ieee80211_key_conf *key;
1407                 struct {
1408                         struct ieee80211_key_conf conf;
1409                         u8 key[32];
1410                 } conf = {
1411                         .conf.cipher = gtkdata.cipher,
1412                         .conf.keyidx = status->gtk.key_index,
1413                 };
1414
1415                 switch (gtkdata.cipher) {
1416                 case WLAN_CIPHER_SUITE_CCMP:
1417                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1418                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1419                                WLAN_KEY_LEN_CCMP);
1420                         break;
1421                 case WLAN_CIPHER_SUITE_TKIP:
1422                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1423                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1424                         /* leave TX MIC key zeroed, we don't use it anyway */
1425                         memcpy(conf.conf.key +
1426                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1427                                status->gtk.tkip_mic_key, 8);
1428                         break;
1429                 }
1430
1431                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1432                 if (IS_ERR(key))
1433                         return false;
1434                 iwl_mvm_set_key_rx_seq(key, status);
1435         }
1436
1437         if (status->num_of_gtk_rekeys) {
1438                 __be64 replay_ctr =
1439                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1440                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1441                                            (void *)&replay_ctr, GFP_KERNEL);
1442         }
1443
1444 out:
1445         mvmvif->seqno_valid = true;
1446         /* +0x10 because the set API expects next-to-use, not last-used */
1447         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1448
1449         return true;
1450 }
1451
1452 /* releases the MVM mutex */
1453 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1454                                          struct ieee80211_vif *vif)
1455 {
1456         u32 base = mvm->error_event_table;
1457         struct error_table_start {
1458                 /* cf. struct iwl_error_event_table */
1459                 u32 valid;
1460                 u32 error_id;
1461         } err_info;
1462         struct iwl_host_cmd cmd = {
1463                 .id = WOWLAN_GET_STATUSES,
1464                 .flags = CMD_WANT_SKB,
1465         };
1466         struct iwl_wowlan_status_data status;
1467         struct iwl_wowlan_status *fw_status;
1468         int ret, len, status_size, i;
1469         bool keep;
1470         struct ieee80211_sta *ap_sta;
1471         struct iwl_mvm_sta *mvm_ap_sta;
1472
1473         iwl_trans_read_mem_bytes(mvm->trans, base,
1474                                  &err_info, sizeof(err_info));
1475
1476         if (err_info.valid) {
1477                 IWL_INFO(mvm, "error table is valid (%d)\n",
1478                          err_info.valid);
1479                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1480                         struct cfg80211_wowlan_wakeup wakeup = {
1481                                 .rfkill_release = true,
1482                         };
1483                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1484                                                        GFP_KERNEL);
1485                 }
1486                 goto out_unlock;
1487         }
1488
1489         /* only for tracing for now */
1490         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1491         if (ret)
1492                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1493
1494         ret = iwl_mvm_send_cmd(mvm, &cmd);
1495         if (ret) {
1496                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1497                 goto out_unlock;
1498         }
1499
1500         /* RF-kill already asserted again... */
1501         if (!cmd.resp_pkt)
1502                 goto out_unlock;
1503
1504         status_size = sizeof(*fw_status);
1505
1506         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1507         if (len < status_size) {
1508                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1509                 goto out_free_resp;
1510         }
1511
1512         fw_status = (void *)cmd.resp_pkt->data;
1513
1514         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1515         for (i = 0; i < 8; i++)
1516                 status.qos_seq_ctr[i] =
1517                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1518         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1519         status.wake_packet_length =
1520                 le32_to_cpu(fw_status->wake_packet_length);
1521         status.wake_packet_bufsize =
1522                 le32_to_cpu(fw_status->wake_packet_bufsize);
1523         status.wake_packet = fw_status->wake_packet;
1524
1525         if (len != status_size + ALIGN(status.wake_packet_bufsize, 4)) {
1526                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1527                 goto out_free_resp;
1528         }
1529
1530         /* still at hard-coded place 0 for D3 image */
1531         ap_sta = rcu_dereference_protected(
1532                         mvm->fw_id_to_mac_id[0],
1533                         lockdep_is_held(&mvm->mutex));
1534         if (IS_ERR_OR_NULL(ap_sta))
1535                 goto out_free_resp;
1536
1537         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
1538         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1539                 u16 seq = status.qos_seq_ctr[i];
1540                 /* firmware stores last-used value, we store next value */
1541                 seq += 0x10;
1542                 mvm_ap_sta->tid_data[i].seq_number = seq;
1543         }
1544
1545         /* now we have all the data we need, unlock to avoid mac80211 issues */
1546         mutex_unlock(&mvm->mutex);
1547
1548         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1549
1550         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1551
1552         iwl_free_resp(&cmd);
1553         return keep;
1554
1555  out_free_resp:
1556         iwl_free_resp(&cmd);
1557  out_unlock:
1558         mutex_unlock(&mvm->mutex);
1559         return false;
1560 }
1561
1562 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1563 {
1564 #ifdef CONFIG_IWLWIFI_DEBUGFS
1565         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1566         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1567         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1568
1569         if (!mvm->store_d3_resume_sram)
1570                 return;
1571
1572         if (!mvm->d3_resume_sram) {
1573                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1574                 if (!mvm->d3_resume_sram)
1575                         return;
1576         }
1577
1578         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1579 #endif
1580 }
1581
1582 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1583                                        struct ieee80211_vif *vif)
1584 {
1585         /* skip the one we keep connection on */
1586         if (data == vif)
1587                 return;
1588
1589         if (vif->type == NL80211_IFTYPE_STATION)
1590                 ieee80211_resume_disconnect(vif);
1591 }
1592
1593 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1594 {
1595         struct iwl_d3_iter_data resume_iter_data = {
1596                 .mvm = mvm,
1597         };
1598         struct ieee80211_vif *vif = NULL;
1599         int ret;
1600         enum iwl_d3_status d3_status;
1601         bool keep = false;
1602
1603         mutex_lock(&mvm->mutex);
1604
1605         /* get the BSS vif pointer again */
1606         ieee80211_iterate_active_interfaces_atomic(
1607                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1608                 iwl_mvm_d3_iface_iterator, &resume_iter_data);
1609
1610         if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
1611                 goto out_unlock;
1612
1613         vif = resume_iter_data.vif;
1614
1615         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1616         if (ret)
1617                 goto out_unlock;
1618
1619         if (d3_status != IWL_D3_STATUS_ALIVE) {
1620                 IWL_INFO(mvm, "Device was reset during suspend\n");
1621                 goto out_unlock;
1622         }
1623
1624         /* query SRAM first in case we want event logging */
1625         iwl_mvm_read_d3_sram(mvm);
1626
1627         keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1628 #ifdef CONFIG_IWLWIFI_DEBUGFS
1629         if (keep)
1630                 mvm->keep_vif = vif;
1631 #endif
1632         /* has unlocked the mutex, so skip that */
1633         goto out;
1634
1635  out_unlock:
1636         mutex_unlock(&mvm->mutex);
1637
1638  out:
1639         if (!test)
1640                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1641                         IEEE80211_IFACE_ITER_NORMAL,
1642                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1643
1644         /* return 1 to reconfigure the device */
1645         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1646         return 1;
1647 }
1648
1649 int iwl_mvm_resume(struct ieee80211_hw *hw)
1650 {
1651         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1652
1653         if (iwl_mvm_is_d0i3_supported(mvm)) {
1654                 bool exit_now;
1655
1656                 mutex_lock(&mvm->d0i3_suspend_mutex);
1657                 __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1658                 exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1659                                                 &mvm->d0i3_suspend_flags);
1660                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1661                 if (exit_now)
1662                         _iwl_mvm_exit_d0i3(mvm);
1663                 return 0;
1664         }
1665
1666         return __iwl_mvm_resume(mvm, false);
1667 }
1668
1669 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1670 {
1671         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1672
1673         device_set_wakeup_enable(mvm->trans->dev, enabled);
1674 }
1675
1676 #ifdef CONFIG_IWLWIFI_DEBUGFS
1677 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1678 {
1679         struct iwl_mvm *mvm = inode->i_private;
1680         int err;
1681
1682         if (mvm->d3_test_active)
1683                 return -EBUSY;
1684
1685         file->private_data = inode->i_private;
1686
1687         ieee80211_stop_queues(mvm->hw);
1688         synchronize_net();
1689
1690         /* start pseudo D3 */
1691         rtnl_lock();
1692         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1693         rtnl_unlock();
1694         if (err > 0)
1695                 err = -EINVAL;
1696         if (err) {
1697                 ieee80211_wake_queues(mvm->hw);
1698                 return err;
1699         }
1700         mvm->d3_test_active = true;
1701         mvm->keep_vif = NULL;
1702         return 0;
1703 }
1704
1705 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1706                                     size_t count, loff_t *ppos)
1707 {
1708         struct iwl_mvm *mvm = file->private_data;
1709         u32 pme_asserted;
1710
1711         while (true) {
1712                 /* read pme_ptr if available */
1713                 if (mvm->d3_test_pme_ptr) {
1714                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
1715                                                 mvm->d3_test_pme_ptr);
1716                         if (pme_asserted)
1717                                 break;
1718                 }
1719
1720                 if (msleep_interruptible(100))
1721                         break;
1722         }
1723
1724         return 0;
1725 }
1726
1727 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1728                                               struct ieee80211_vif *vif)
1729 {
1730         /* skip the one we keep connection on */
1731         if (_data == vif)
1732                 return;
1733
1734         if (vif->type == NL80211_IFTYPE_STATION)
1735                 ieee80211_connection_loss(vif);
1736 }
1737
1738 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1739 {
1740         struct iwl_mvm *mvm = inode->i_private;
1741         int remaining_time = 10;
1742
1743         mvm->d3_test_active = false;
1744         __iwl_mvm_resume(mvm, true);
1745         iwl_abort_notification_waits(&mvm->notif_wait);
1746         ieee80211_restart_hw(mvm->hw);
1747
1748         /* wait for restart and disconnect all interfaces */
1749         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1750                remaining_time > 0) {
1751                 remaining_time--;
1752                 msleep(1000);
1753         }
1754
1755         if (remaining_time == 0)
1756                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1757
1758         ieee80211_iterate_active_interfaces_atomic(
1759                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1760                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
1761
1762         ieee80211_wake_queues(mvm->hw);
1763
1764         return 0;
1765 }
1766
1767 const struct file_operations iwl_dbgfs_d3_test_ops = {
1768         .llseek = no_llseek,
1769         .open = iwl_mvm_d3_test_open,
1770         .read = iwl_mvm_d3_test_read,
1771         .release = iwl_mvm_d3_test_release,
1772 };
1773 #endif