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  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
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  20  * along with this program; if not, write to the Free Software
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  22  * USA
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  25  * in the file called COPYING.
  26  *
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  30  *
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  32  *
  33  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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  41  *    notice, this list of conditions and the following disclaimer.
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  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63
  64 #include <linux/etherdevice.h>
  65 #include <linux/ip.h>
  66 #include <linux/fs.h>
  67 #include <net/cfg80211.h>
  68 #include <net/ipv6.h>
  69 #include <net/tcp.h>
  70 #include <net/addrconf.h>
  71 #include "iwl-modparams.h"
  72 #include "fw-api.h"
  73 #include "mvm.h"
  74
  75 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  76                             struct ieee80211_vif *vif,
  77                             struct cfg80211_gtk_rekey_data *data)
  78 {
  79         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  80         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  81
  82         if (iwlwifi_mod_params.sw_crypto)
  83                 return;
  84
  85         mutex_lock(&mvm->mutex);
  86
  87         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  88         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  89         mvmvif->rekey_data.replay_ctr =
  90                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
  91         mvmvif->rekey_data.valid = true;
  92
  93         mutex_unlock(&mvm->mutex);
  94 }
  95
  96 #if IS_ENABLED(CONFIG_IPV6)
  97 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
  98                               struct ieee80211_vif *vif,
  99                               struct inet6_dev *idev)
 100 {
 101         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 102         struct inet6_ifaddr *ifa;
 103         int idx = 0;
 104
 105         read_lock_bh(&idev->lock);
 106         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 107                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 108                 idx++;
 109                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
 110                         break;
 111         }
 112         read_unlock_bh(&idev->lock);
 113
 114         mvmvif->num_target_ipv6_addrs = idx;
 115 }
 116 #endif
 117
 118 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 119                                      struct ieee80211_vif *vif, int idx)
 120 {
 121         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 122
 123         mvmvif->tx_key_idx = idx;
 124 }
 125
 126 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 127 {
 128         int i;
 129
 130         for (i = 0; i < IWL_P1K_SIZE; i++)
 131                 out[i] = cpu_to_le16(p1k[i]);
 132 }
 133
 134 struct wowlan_key_data {
 135         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 136         struct iwl_wowlan_tkip_params_cmd *tkip;
 137         bool error, use_rsc_tsc, use_tkip;
 138         int wep_key_idx;
 139 };
 140
 141 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 142                                         struct ieee80211_vif *vif,
 143                                         struct ieee80211_sta *sta,
 144                                         struct ieee80211_key_conf *key,
 145                                         void *_data)
 146 {
 147         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 148         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 149         struct wowlan_key_data *data = _data;
 150         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 151         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 152         struct iwl_p1k_cache *rx_p1ks;
 153         u8 *rx_mic_key;
 154         struct ieee80211_key_seq seq;
 155         u32 cur_rx_iv32 = 0;
 156         u16 p1k[IWL_P1K_SIZE];
 157         int ret, i;
 158
 159         mutex_lock(&mvm->mutex);
 160
 161         switch (key->cipher) {
 162         case WLAN_CIPHER_SUITE_WEP40:
 163         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 164                 struct {
 165                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 166                         struct iwl_mvm_wep_key wep_key;
 167                 } __packed wkc = {
 168                         .wep_key_cmd.mac_id_n_color =
 169                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 170                                                                 mvmvif->color)),
 171                         .wep_key_cmd.num_keys = 1,
 172                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 173                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 174                         .wep_key.key_index = key->keyidx,
 175                         .wep_key.key_size = key->keylen,
 176                 };
 177
 178                 /*
 179                  * This will fail -- the key functions don't set support
 180                  * pairwise WEP keys. However, that's better than silently
 181                  * failing WoWLAN. Or maybe not?
 182                  */
 183                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 184                         break;
 185
 186                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 187                 if (key->keyidx == mvmvif->tx_key_idx) {
 188                         /* TX key must be at offset 0 */
 189                         wkc.wep_key.key_offset = 0;
 190                 } else {
 191                         /* others start at 1 */
 192                         data->wep_key_idx++;
 193                         wkc.wep_key.key_offset = data->wep_key_idx;
 194                 }
 195
 196                 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
 197                                            sizeof(wkc), &wkc);
 198                 data->error = ret != 0;
 199
 200                 mvm->ptk_ivlen = key->iv_len;
 201                 mvm->ptk_icvlen = key->icv_len;
 202                 mvm->gtk_ivlen = key->iv_len;
 203                 mvm->gtk_icvlen = key->icv_len;
 204
 205                 /* don't upload key again */
 206                 goto out_unlock;
 207         }
 208         default:
 209                 data->error = true;
 210                 goto out_unlock;
 211         case WLAN_CIPHER_SUITE_AES_CMAC:
 212                 /*
 213                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 214                  * but we also shouldn't abort suspend due to that. It does have
 215                  * support for the IGTK key renewal, but doesn't really use the
 216                  * IGTK for anything. This means we could spuriously wake up or
 217                  * be deauthenticated, but that was considered acceptable.
 218                  */
 219                 goto out_unlock;
 220         case WLAN_CIPHER_SUITE_TKIP:
 221                 if (sta) {
 222                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 223                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 224
 225                         rx_p1ks = data->tkip->rx_uni;
 226
 227                         ieee80211_get_key_tx_seq(key, &seq);
 228                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 229                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 230
 231                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 232                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 233
 234                         memcpy(data->tkip->mic_keys.tx,
 235                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 236                                IWL_MIC_KEY_SIZE);
 237
 238                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 239                 } else {
 240                         tkip_sc =
 241                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 242                         rx_p1ks = data->tkip->rx_multi;
 243                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 244                 }
 245
 246                 /*
 247                  * For non-QoS this relies on the fact that both the uCode and
 248                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 249                  * for checking the IV in the frames.
 250                  */
 251                 for (i = 0; i < IWL_NUM_RSC; i++) {
 252                         ieee80211_get_key_rx_seq(key, i, &seq);
 253                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 254                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 255                         /* wrapping isn't allowed, AP must rekey */
 256                         if (seq.tkip.iv32 > cur_rx_iv32)
 257                                 cur_rx_iv32 = seq.tkip.iv32;
 258                 }
 259
 260                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 261                                           cur_rx_iv32, p1k);
 262                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 263                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 264                                           cur_rx_iv32 + 1, p1k);
 265                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 266
 267                 memcpy(rx_mic_key,
 268                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 269                        IWL_MIC_KEY_SIZE);
 270
 271                 data->use_tkip = true;
 272                 data->use_rsc_tsc = true;
 273                 break;
 274         case WLAN_CIPHER_SUITE_CCMP:
 275                 if (sta) {
 276                         u8 *pn = seq.ccmp.pn;
 277
 278                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 279                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 280
 281                         ieee80211_get_key_tx_seq(key, &seq);
 282                         aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
 283                                                     ((u64)pn[4] << 8) |
 284                                                     ((u64)pn[3] << 16) |
 285                                                     ((u64)pn[2] << 24) |
 286                                                     ((u64)pn[1] << 32) |
 287                                                     ((u64)pn[0] << 40));
 288                 } else {
 289                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 290                 }
 291
 292                 /*
 293                  * For non-QoS this relies on the fact that both the uCode and
 294                  * mac80211 use TID 0 for checking the IV in the frames.
 295                  */
 296                 for (i = 0; i < IWL_NUM_RSC; i++) {
 297                         u8 *pn = seq.ccmp.pn;
 298
 299                         ieee80211_get_key_rx_seq(key, i, &seq);
 300                         aes_sc->pn = cpu_to_le64((u64)pn[5] |
 301                                                  ((u64)pn[4] << 8) |
 302                                                  ((u64)pn[3] << 16) |
 303                                                  ((u64)pn[2] << 24) |
 304                                                  ((u64)pn[1] << 32) |
 305                                                  ((u64)pn[0] << 40));
 306                 }
 307                 data->use_rsc_tsc = true;
 308                 break;
 309         }
 310
 311         /*
 312          * The D3 firmware hardcodes the key offset 0 as the key it uses
 313          * to transmit packets to the AP, i.e. the PTK.
 314          */
 315         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 316                 key->hw_key_idx = 0;
 317                 mvm->ptk_ivlen = key->iv_len;
 318                 mvm->ptk_icvlen = key->icv_len;
 319         } else {
 320                 /*
 321                  * firmware only supports TSC/RSC for a single key,
 322                  * so if there are multiple keep overwriting them
 323                  * with new ones -- this relies on mac80211 doing
 324                  * list_add_tail().
 325                  */
 326                 key->hw_key_idx = 1;
 327                 mvm->gtk_ivlen = key->iv_len;
 328                 mvm->gtk_icvlen = key->icv_len;
 329         }
 330
 331         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 332         data->error = ret != 0;
 333 out_unlock:
 334         mutex_unlock(&mvm->mutex);
 335 }
 336
 337 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 338                                  struct cfg80211_wowlan *wowlan)
 339 {
 340         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 341         struct iwl_host_cmd cmd = {
 342                 .id = WOWLAN_PATTERNS,
 343                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 344                 .flags = CMD_SYNC,
 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                 .flags = CMD_SYNC,
 522         };
 523         int ret;
 524
 525         if (!tcp)
 526                 return 0;
 527
 528         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 529         if (!cfg)
 530                 return -ENOMEM;
 531         cmd.data[0] = cfg;
 532
 533         cfg->max_syn_retries = 10;
 534         cfg->max_data_retries = 10;
 535         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 536         cfg->tcp_ack_timeout = 1; /* seconds */
 537
 538         /* SYN (TX) */
 539         iwl_mvm_build_tcp_packet(
 540                 vif, tcp, cfg->syn_tx.data, NULL,
 541                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 542                 MVM_TCP_TX_SYN);
 543         cfg->syn_tx.info.tcp_payload_length = 0;
 544
 545         /* SYN/ACK (RX) */
 546         iwl_mvm_build_tcp_packet(
 547                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 548                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 549                 MVM_TCP_RX_SYNACK);
 550         cfg->synack_rx.info.tcp_payload_length = 0;
 551
 552         /* KEEPALIVE/ACK (TX) */
 553         iwl_mvm_build_tcp_packet(
 554                 vif, tcp, cfg->keepalive_tx.data, NULL,
 555                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 556                 MVM_TCP_TX_DATA);
 557         cfg->keepalive_tx.info.tcp_payload_length =
 558                 cpu_to_le16(tcp->payload_len);
 559         cfg->sequence_number_offset = tcp->payload_seq.offset;
 560         /* length must be 0..4, the field is little endian */
 561         cfg->sequence_number_length = tcp->payload_seq.len;
 562         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 563         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 564         if (tcp->payload_tok.len) {
 565                 cfg->token_offset = tcp->payload_tok.offset;
 566                 cfg->token_length = tcp->payload_tok.len;
 567                 cfg->num_tokens =
 568                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 569                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 570                        tcp->tokens_size);
 571         } else {
 572                 /* set tokens to max value to almost never run out */
 573                 cfg->num_tokens = cpu_to_le16(65535);
 574         }
 575
 576         /* ACK (RX) */
 577         iwl_mvm_build_tcp_packet(
 578                 vif, tcp, cfg->keepalive_ack_rx.data,
 579                 cfg->keepalive_ack_rx.rx_mask,
 580                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 581                 MVM_TCP_RX_ACK);
 582         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 583
 584         /* WAKEUP (RX) */
 585         iwl_mvm_build_tcp_packet(
 586                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 587                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 588                 MVM_TCP_RX_WAKE);
 589         cfg->wake_rx.info.tcp_payload_length =
 590                 cpu_to_le16(tcp->wake_len);
 591
 592         /* FIN */
 593         iwl_mvm_build_tcp_packet(
 594                 vif, tcp, cfg->fin_tx.data, NULL,
 595                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 596                 MVM_TCP_TX_FIN);
 597         cfg->fin_tx.info.tcp_payload_length = 0;
 598
 599         ret = iwl_mvm_send_cmd(mvm, &cmd);
 600         kfree(cfg);
 601
 602         return ret;
 603 }
 604
 605 struct iwl_d3_iter_data {
 606         struct iwl_mvm *mvm;
 607         struct ieee80211_vif *vif;
 608         bool error;
 609 };
 610
 611 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
 612                                       struct ieee80211_vif *vif)
 613 {
 614         struct iwl_d3_iter_data *data = _data;
 615         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 616
 617         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 618                 return;
 619
 620         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 621                 return;
 622
 623         if (data->vif) {
 624                 IWL_ERR(data->mvm, "More than one managed interface active!\n");
 625                 data->error = true;
 626                 return;
 627         }
 628
 629         data->vif = vif;
 630 }
 631
 632 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 633                                 struct ieee80211_sta *ap_sta)
 634 {
 635         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 636         struct ieee80211_chanctx_conf *ctx;
 637         u8 chains_static, chains_dynamic;
 638         struct cfg80211_chan_def chandef;
 639         int ret, i;
 640         struct iwl_binding_cmd binding_cmd = {};
 641         struct iwl_time_quota_cmd quota_cmd = {};
 642         u32 status;
 643
 644         /* add back the PHY */
 645         if (WARN_ON(!mvmvif->phy_ctxt))
 646                 return -EINVAL;
 647
 648         rcu_read_lock();
 649         ctx = rcu_dereference(vif->chanctx_conf);
 650         if (WARN_ON(!ctx)) {
 651                 rcu_read_unlock();
 652                 return -EINVAL;
 653         }
 654         chandef = ctx->def;
 655         chains_static = ctx->rx_chains_static;
 656         chains_dynamic = ctx->rx_chains_dynamic;
 657         rcu_read_unlock();
 658
 659         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 660                                    chains_static, chains_dynamic);
 661         if (ret)
 662                 return ret;
 663
 664         /* add back the MAC */
 665         mvmvif->uploaded = false;
 666
 667         if (WARN_ON(!vif->bss_conf.assoc))
 668                 return -EINVAL;
 669         /* hack */
 670         vif->bss_conf.assoc = false;
 671         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 672         vif->bss_conf.assoc = true;
 673         if (ret)
 674                 return ret;
 675
 676         /* add back binding - XXX refactor? */
 677         binding_cmd.id_and_color =
 678                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 679                                                 mvmvif->phy_ctxt->color));
 680         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 681         binding_cmd.phy =
 682                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 683                                                 mvmvif->phy_ctxt->color));
 684         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 685                                                               mvmvif->color));
 686         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 687                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 688
 689         status = 0;
 690         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 691                                           sizeof(binding_cmd), &binding_cmd,
 692                                           &status);
 693         if (ret) {
 694                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 695                 return ret;
 696         }
 697
 698         if (status) {
 699                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 700                 return -EIO;
 701         }
 702
 703         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 704         if (ret)
 705                 return ret;
 706         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 707
 708         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 709         if (ret)
 710                 return ret;
 711
 712         /* and some quota */
 713         quota_cmd.quotas[0].id_and_color =
 714                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 715                                                 mvmvif->phy_ctxt->color));
 716         quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 717         quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 718
 719         for (i = 1; i < MAX_BINDINGS; i++)
 720                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 721
 722         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 723                                    sizeof(quota_cmd), &quota_cmd);
 724         if (ret)
 725                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 726
 727         return 0;
 728 }
 729
 730 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 731                                        struct ieee80211_vif *vif)
 732 {
 733         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 734         struct iwl_nonqos_seq_query_cmd query_cmd = {
 735                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 736                 .mac_id_n_color =
 737                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 738                                                         mvmvif->color)),
 739         };
 740         struct iwl_host_cmd cmd = {
 741                 .id = NON_QOS_TX_COUNTER_CMD,
 742                 .flags = CMD_SYNC | CMD_WANT_SKB,
 743         };
 744         int err;
 745         u32 size;
 746
 747         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API) {
 748                 cmd.data[0] = &query_cmd;
 749                 cmd.len[0] = sizeof(query_cmd);
 750         }
 751
 752         err = iwl_mvm_send_cmd(mvm, &cmd);
 753         if (err)
 754                 return err;
 755
 756         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 757         if (size < sizeof(__le16)) {
 758                 err = -EINVAL;
 759         } else {
 760                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 761                 /* new API returns next, not last-used seqno */
 762                 if (mvm->fw->ucode_capa.flags &
 763                                 IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API)
 764                         err = (u16) (err - 0x10);
 765         }
 766
 767         iwl_free_resp(&cmd);
 768         return err;
 769 }
 770
 771 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 772 {
 773         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 774         struct iwl_nonqos_seq_query_cmd query_cmd = {
 775                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 776                 .mac_id_n_color =
 777                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 778                                                         mvmvif->color)),
 779                 .value = cpu_to_le16(mvmvif->seqno),
 780         };
 781
 782         /* return if called during restart, not resume from D3 */
 783         if (!mvmvif->seqno_valid)
 784                 return;
 785
 786         mvmvif->seqno_valid = false;
 787
 788         if (!(mvm->fw->ucode_capa.flags &
 789                         IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API))
 790                 return;
 791
 792         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, CMD_SYNC,
 793                                  sizeof(query_cmd), &query_cmd))
 794                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 795 }
 796
 797 static int
 798 iwl_mvm_send_wowlan_config_cmd(struct iwl_mvm *mvm,
 799                                const struct iwl_wowlan_config_cmd_v3 *cmd)
 800 {
 801         /* start only with the v2 part of the command */
 802         u16 cmd_len = sizeof(cmd->common);
 803
 804         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_WOWLAN_CONFIG_TID)
 805                 cmd_len = sizeof(*cmd);
 806
 807         return iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, CMD_SYNC,
 808                                     cmd_len, cmd);
 809 }
 810
 811 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 812                              struct cfg80211_wowlan *wowlan,
 813                              bool test)
 814 {
 815         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 816         struct iwl_d3_iter_data suspend_iter_data = {
 817                 .mvm = mvm,
 818         };
 819         struct ieee80211_vif *vif;
 820         struct iwl_mvm_vif *mvmvif;
 821         struct ieee80211_sta *ap_sta;
 822         struct iwl_mvm_sta *mvm_ap_sta;
 823         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {};
 824         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 825         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 826         struct iwl_d3_manager_config d3_cfg_cmd_data = {
 827                 /*
 828                  * Program the minimum sleep time to 10 seconds, as many
 829                  * platforms have issues processing a wakeup signal while
 830                  * still being in the process of suspending.
 831                  */
 832                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
 833         };
 834         struct iwl_host_cmd d3_cfg_cmd = {
 835                 .id = D3_CONFIG_CMD,
 836                 .flags = CMD_SYNC | CMD_WANT_SKB,
 837                 .data[0] = &d3_cfg_cmd_data,
 838                 .len[0] = sizeof(d3_cfg_cmd_data),
 839         };
 840         struct wowlan_key_data key_data = {
 841                 .use_rsc_tsc = false,
 842                 .tkip = &tkip_cmd,
 843                 .use_tkip = false,
 844         };
 845         int ret;
 846         int len __maybe_unused;
 847
 848         if (!wowlan) {
 849                 /*
 850                  * mac80211 shouldn't get here, but for D3 test
 851                  * it doesn't warrant a warning
 852                  */
 853                 WARN_ON(!test);
 854                 return -EINVAL;
 855         }
 856
 857         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 858         if (!key_data.rsc_tsc)
 859                 return -ENOMEM;
 860
 861         mutex_lock(&mvm->mutex);
 862
 863         /* see if there's only a single BSS vif and it's associated */
 864         ieee80211_iterate_active_interfaces_atomic(
 865                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 866                 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
 867
 868         if (suspend_iter_data.error || !suspend_iter_data.vif) {
 869                 ret = 1;
 870                 goto out_noreset;
 871         }
 872
 873         vif = suspend_iter_data.vif;
 874         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 875
 876         ap_sta = rcu_dereference_protected(
 877                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 878                         lockdep_is_held(&mvm->mutex));
 879         if (IS_ERR_OR_NULL(ap_sta)) {
 880                 ret = -EINVAL;
 881                 goto out_noreset;
 882         }
 883
 884         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 885
 886         /* TODO: wowlan_config_cmd.common.wowlan_ba_teardown_tids */
 887
 888         wowlan_config_cmd.common.is_11n_connection =
 889                                         ap_sta->ht_cap.ht_supported;
 890
 891         /* Query the last used seqno and set it */
 892         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 893         if (ret < 0)
 894                 goto out_noreset;
 895         wowlan_config_cmd.common.non_qos_seq = cpu_to_le16(ret);
 896
 897         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &wowlan_config_cmd.common);
 898
 899         if (wowlan->disconnect)
 900                 wowlan_config_cmd.common.wakeup_filter |=
 901                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 902                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 903         if (wowlan->magic_pkt)
 904                 wowlan_config_cmd.common.wakeup_filter |=
 905                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 906         if (wowlan->gtk_rekey_failure)
 907                 wowlan_config_cmd.common.wakeup_filter |=
 908                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 909         if (wowlan->eap_identity_req)
 910                 wowlan_config_cmd.common.wakeup_filter |=
 911                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 912         if (wowlan->four_way_handshake)
 913                 wowlan_config_cmd.common.wakeup_filter |=
 914                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 915         if (wowlan->n_patterns)
 916                 wowlan_config_cmd.common.wakeup_filter |=
 917                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 918
 919         if (wowlan->rfkill_release)
 920                 wowlan_config_cmd.common.wakeup_filter |=
 921                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 922
 923         if (wowlan->tcp) {
 924                 /*
 925                  * Set the "link change" (really "link lost") flag as well
 926                  * since that implies losing the TCP connection.
 927                  */
 928                 wowlan_config_cmd.common.wakeup_filter |=
 929                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 930                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 931                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 932                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 933         }
 934
 935         iwl_mvm_cancel_scan(mvm);
 936
 937         iwl_trans_stop_device(mvm->trans);
 938
 939         /*
 940          * Set the HW restart bit -- this is mostly true as we're
 941          * going to load new firmware and reprogram that, though
 942          * the reprogramming is going to be manual to avoid adding
 943          * all the MACs that aren't support.
 944          * We don't have to clear up everything though because the
 945          * reprogramming is manual. When we resume, we'll actually
 946          * go through a proper restart sequence again to switch
 947          * back to the runtime firmware image.
 948          */
 949         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 950
 951         /* We reprogram keys and shouldn't allocate new key indices */
 952         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 953
 954         mvm->ptk_ivlen = 0;
 955         mvm->ptk_icvlen = 0;
 956         mvm->ptk_ivlen = 0;
 957         mvm->ptk_icvlen = 0;
 958
 959         ret = iwl_mvm_load_d3_fw(mvm);
 960         if (ret)
 961                 goto out;
 962
 963         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 964         if (ret)
 965                 goto out;
 966
 967         if (!iwlwifi_mod_params.sw_crypto) {
 968                 /*
 969                  * This needs to be unlocked due to lock ordering
 970                  * constraints. Since we're in the suspend path
 971                  * that isn't really a problem though.
 972                  */
 973                 mutex_unlock(&mvm->mutex);
 974                 ieee80211_iter_keys(mvm->hw, vif,
 975                                     iwl_mvm_wowlan_program_keys,
 976                                     &key_data);
 977                 mutex_lock(&mvm->mutex);
 978                 if (key_data.error) {
 979                         ret = -EIO;
 980                         goto out;
 981                 }
 982
 983                 if (key_data.use_rsc_tsc) {
 984                         struct iwl_host_cmd rsc_tsc_cmd = {
 985                                 .id = WOWLAN_TSC_RSC_PARAM,
 986                                 .flags = CMD_SYNC,
 987                                 .data[0] = key_data.rsc_tsc,
 988                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 989                                 .len[0] = sizeof(*key_data.rsc_tsc),
 990                         };
 991
 992                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 993                         if (ret)
 994                                 goto out;
 995                 }
 996
 997                 if (key_data.use_tkip) {
 998                         ret = iwl_mvm_send_cmd_pdu(mvm,
 999                                                    WOWLAN_TKIP_PARAM,
1000                                                    CMD_SYNC, sizeof(tkip_cmd),
1001                                                    &tkip_cmd);
1002                         if (ret)
1003                                 goto out;
1004                 }
1005
1006                 if (mvmvif->rekey_data.valid) {
1007                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1008                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
1009                                NL80211_KCK_LEN);
1010                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1011                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1012                                NL80211_KEK_LEN);
1013                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1014                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1015
1016                         ret = iwl_mvm_send_cmd_pdu(mvm,
1017                                                    WOWLAN_KEK_KCK_MATERIAL,
1018                                                    CMD_SYNC,
1019                                                    sizeof(kek_kck_cmd),
1020                                                    &kek_kck_cmd);
1021                         if (ret)
1022                                 goto out;
1023                 }
1024         }
1025
1026         ret = iwl_mvm_send_wowlan_config_cmd(mvm, &wowlan_config_cmd);
1027         if (ret)
1028                 goto out;
1029
1030         ret = iwl_mvm_send_patterns(mvm, wowlan);
1031         if (ret)
1032                 goto out;
1033
1034         ret = iwl_mvm_send_proto_offload(mvm, vif, false, CMD_SYNC);
1035         if (ret)
1036                 goto out;
1037
1038         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1039         if (ret)
1040                 goto out;
1041
1042         ret = iwl_mvm_power_update_device(mvm);
1043         if (ret)
1044                 goto out;
1045
1046         ret = iwl_mvm_power_update_mac(mvm, vif);
1047         if (ret)
1048                 goto out;
1049
1050 #ifdef CONFIG_IWLWIFI_DEBUGFS
1051         if (mvm->d3_wake_sysassert)
1052                 d3_cfg_cmd_data.wakeup_flags |=
1053                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1054 #endif
1055
1056         /* must be last -- this switches firmware state */
1057         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1058         if (ret)
1059                 goto out;
1060 #ifdef CONFIG_IWLWIFI_DEBUGFS
1061         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1062         if (len >= sizeof(u32)) {
1063                 mvm->d3_test_pme_ptr =
1064                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1065         }
1066 #endif
1067         iwl_free_resp(&d3_cfg_cmd);
1068
1069         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1070
1071         iwl_trans_d3_suspend(mvm->trans, test);
1072  out:
1073         if (ret < 0)
1074                 ieee80211_restart_hw(mvm->hw);
1075  out_noreset:
1076         kfree(key_data.rsc_tsc);
1077
1078         mutex_unlock(&mvm->mutex);
1079
1080         return ret;
1081 }
1082
1083 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1084 {
1085         return __iwl_mvm_suspend(hw, wowlan, false);
1086 }
1087
1088 /* converted data from the different status responses */
1089 struct iwl_wowlan_status_data {
1090         u16 pattern_number;
1091         u16 qos_seq_ctr[8];
1092         u32 wakeup_reasons;
1093         u32 wake_packet_length;
1094         u32 wake_packet_bufsize;
1095         const u8 *wake_packet;
1096 };
1097
1098 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1099                                           struct ieee80211_vif *vif,
1100                                           struct iwl_wowlan_status_data *status)
1101 {
1102         struct sk_buff *pkt = NULL;
1103         struct cfg80211_wowlan_wakeup wakeup = {
1104                 .pattern_idx = -1,
1105         };
1106         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1107         u32 reasons = status->wakeup_reasons;
1108
1109         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1110                 wakeup_report = NULL;
1111                 goto report;
1112         }
1113
1114         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1115                 wakeup.magic_pkt = true;
1116
1117         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1118                 wakeup.pattern_idx =
1119                         status->pattern_number;
1120
1121         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1122                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1123                 wakeup.disconnect = true;
1124
1125         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1126                 wakeup.gtk_rekey_failure = true;
1127
1128         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1129                 wakeup.rfkill_release = true;
1130
1131         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1132                 wakeup.eap_identity_req = true;
1133
1134         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1135                 wakeup.four_way_handshake = true;
1136
1137         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1138                 wakeup.tcp_connlost = true;
1139
1140         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1141                 wakeup.tcp_nomoretokens = true;
1142
1143         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1144                 wakeup.tcp_match = true;
1145
1146         if (status->wake_packet_bufsize) {
1147                 int pktsize = status->wake_packet_bufsize;
1148                 int pktlen = status->wake_packet_length;
1149                 const u8 *pktdata = status->wake_packet;
1150                 struct ieee80211_hdr *hdr = (void *)pktdata;
1151                 int truncated = pktlen - pktsize;
1152
1153                 /* this would be a firmware bug */
1154                 if (WARN_ON_ONCE(truncated < 0))
1155                         truncated = 0;
1156
1157                 if (ieee80211_is_data(hdr->frame_control)) {
1158                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1159                         int ivlen = 0, icvlen = 4; /* also FCS */
1160
1161                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1162                         if (!pkt)
1163                                 goto report;
1164
1165                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1166                         pktdata += hdrlen;
1167                         pktsize -= hdrlen;
1168
1169                         if (ieee80211_has_protected(hdr->frame_control)) {
1170                                 /*
1171                                  * This is unlocked and using gtk_i(c)vlen,
1172                                  * but since everything is under RTNL still
1173                                  * that's not really a problem - changing
1174                                  * it would be difficult.
1175                                  */
1176                                 if (is_multicast_ether_addr(hdr->addr1)) {
1177                                         ivlen = mvm->gtk_ivlen;
1178                                         icvlen += mvm->gtk_icvlen;
1179                                 } else {
1180                                         ivlen = mvm->ptk_ivlen;
1181                                         icvlen += mvm->ptk_icvlen;
1182                                 }
1183                         }
1184
1185                         /* if truncated, FCS/ICV is (partially) gone */
1186                         if (truncated >= icvlen) {
1187                                 icvlen = 0;
1188                                 truncated -= icvlen;
1189                         } else {
1190                                 icvlen -= truncated;
1191                                 truncated = 0;
1192                         }
1193
1194                         pktsize -= ivlen + icvlen;
1195                         pktdata += ivlen;
1196
1197                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1198
1199                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1200                                 goto report;
1201                         wakeup.packet = pkt->data;
1202                         wakeup.packet_present_len = pkt->len;
1203                         wakeup.packet_len = pkt->len - truncated;
1204                         wakeup.packet_80211 = false;
1205                 } else {
1206                         int fcslen = 4;
1207
1208                         if (truncated >= 4) {
1209                                 truncated -= 4;
1210                                 fcslen = 0;
1211                         } else {
1212                                 fcslen -= truncated;
1213                                 truncated = 0;
1214                         }
1215                         pktsize -= fcslen;
1216                         wakeup.packet = status->wake_packet;
1217                         wakeup.packet_present_len = pktsize;
1218                         wakeup.packet_len = pktlen - truncated;
1219                         wakeup.packet_80211 = true;
1220                 }
1221         }
1222
1223  report:
1224         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1225         kfree_skb(pkt);
1226 }
1227
1228 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1229                                   struct ieee80211_key_seq *seq)
1230 {
1231         u64 pn;
1232
1233         pn = le64_to_cpu(sc->pn);
1234         seq->ccmp.pn[0] = pn >> 40;
1235         seq->ccmp.pn[1] = pn >> 32;
1236         seq->ccmp.pn[2] = pn >> 24;
1237         seq->ccmp.pn[3] = pn >> 16;
1238         seq->ccmp.pn[4] = pn >> 8;
1239         seq->ccmp.pn[5] = pn;
1240 }
1241
1242 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1243                                    struct ieee80211_key_seq *seq)
1244 {
1245         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1246         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1247 }
1248
1249 static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs,
1250                                    struct ieee80211_key_conf *key)
1251 {
1252         int tid;
1253
1254         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1255
1256         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1257                 struct ieee80211_key_seq seq = {};
1258
1259                 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1260                 ieee80211_set_key_rx_seq(key, tid, &seq);
1261         }
1262 }
1263
1264 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1265                                     struct ieee80211_key_conf *key)
1266 {
1267         int tid;
1268
1269         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1270
1271         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1272                 struct ieee80211_key_seq seq = {};
1273
1274                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1275                 ieee80211_set_key_rx_seq(key, tid, &seq);
1276         }
1277 }
1278
1279 static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key,
1280                                    struct iwl_wowlan_status_v6 *status)
1281 {
1282         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1283
1284         switch (key->cipher) {
1285         case WLAN_CIPHER_SUITE_CCMP:
1286                 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key);
1287                 break;
1288         case WLAN_CIPHER_SUITE_TKIP:
1289                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1290                 break;
1291         default:
1292                 WARN_ON(1);
1293         }
1294 }
1295
1296 struct iwl_mvm_d3_gtk_iter_data {
1297         struct iwl_wowlan_status_v6 *status;
1298         void *last_gtk;
1299         u32 cipher;
1300         bool find_phase, unhandled_cipher;
1301         int num_keys;
1302 };
1303
1304 static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw,
1305                                    struct ieee80211_vif *vif,
1306                                    struct ieee80211_sta *sta,
1307                                    struct ieee80211_key_conf *key,
1308                                    void *_data)
1309 {
1310         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1311
1312         if (data->unhandled_cipher)
1313                 return;
1314
1315         switch (key->cipher) {
1316         case WLAN_CIPHER_SUITE_WEP40:
1317         case WLAN_CIPHER_SUITE_WEP104:
1318                 /* ignore WEP completely, nothing to do */
1319                 return;
1320         case WLAN_CIPHER_SUITE_CCMP:
1321         case WLAN_CIPHER_SUITE_TKIP:
1322                 /* we support these */
1323                 break;
1324         default:
1325                 /* everything else (even CMAC for MFP) - disconnect from AP */
1326                 data->unhandled_cipher = true;
1327                 return;
1328         }
1329
1330         data->num_keys++;
1331
1332         /*
1333          * pairwise key - update sequence counters only;
1334          * note that this assumes no TDLS sessions are active
1335          */
1336         if (sta) {
1337                 struct ieee80211_key_seq seq = {};
1338                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1339
1340                 if (data->find_phase)
1341                         return;
1342
1343                 switch (key->cipher) {
1344                 case WLAN_CIPHER_SUITE_CCMP:
1345                         iwl_mvm_aes_sc_to_seq(&sc->aes.tsc, &seq);
1346                         iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key);
1347                         break;
1348                 case WLAN_CIPHER_SUITE_TKIP:
1349                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1350                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1351                         break;
1352                 }
1353                 ieee80211_set_key_tx_seq(key, &seq);
1354
1355                 /* that's it for this key */
1356                 return;
1357         }
1358
1359         if (data->find_phase) {
1360                 data->last_gtk = key;
1361                 data->cipher = key->cipher;
1362                 return;
1363         }
1364
1365         if (data->status->num_of_gtk_rekeys)
1366                 ieee80211_remove_key(key);
1367         else if (data->last_gtk == key)
1368                 iwl_mvm_set_key_rx_seq(key, data->status);
1369 }
1370
1371 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1372                                           struct ieee80211_vif *vif,
1373                                           struct iwl_wowlan_status_v6 *status)
1374 {
1375         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1376         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1377                 .status = status,
1378         };
1379         u32 disconnection_reasons =
1380                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1381                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1382
1383         if (!status || !vif->bss_conf.bssid)
1384                 return false;
1385
1386         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1387                 return false;
1388
1389         /* find last GTK that we used initially, if any */
1390         gtkdata.find_phase = true;
1391         ieee80211_iter_keys(mvm->hw, vif,
1392                             iwl_mvm_d3_update_gtks, &gtkdata);
1393         /* not trying to keep connections with MFP/unhandled ciphers */
1394         if (gtkdata.unhandled_cipher)
1395                 return false;
1396         if (!gtkdata.num_keys)
1397                 goto out;
1398         if (!gtkdata.last_gtk)
1399                 return false;
1400
1401         /*
1402          * invalidate all other GTKs that might still exist and update
1403          * the one that we used
1404          */
1405         gtkdata.find_phase = false;
1406         ieee80211_iter_keys(mvm->hw, vif,
1407                             iwl_mvm_d3_update_gtks, &gtkdata);
1408
1409         if (status->num_of_gtk_rekeys) {
1410                 struct ieee80211_key_conf *key;
1411                 struct {
1412                         struct ieee80211_key_conf conf;
1413                         u8 key[32];
1414                 } conf = {
1415                         .conf.cipher = gtkdata.cipher,
1416                         .conf.keyidx = status->gtk.key_index,
1417                 };
1418
1419                 switch (gtkdata.cipher) {
1420                 case WLAN_CIPHER_SUITE_CCMP:
1421                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1422                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1423                                WLAN_KEY_LEN_CCMP);
1424                         break;
1425                 case WLAN_CIPHER_SUITE_TKIP:
1426                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1427                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1428                         /* leave TX MIC key zeroed, we don't use it anyway */
1429                         memcpy(conf.conf.key +
1430                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1431                                status->gtk.tkip_mic_key, 8);
1432                         break;
1433                 }
1434
1435                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1436                 if (IS_ERR(key))
1437                         return false;
1438                 iwl_mvm_set_key_rx_seq(key, status);
1439         }
1440
1441         if (status->num_of_gtk_rekeys) {
1442                 __be64 replay_ctr =
1443                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1444                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1445                                            (void *)&replay_ctr, GFP_KERNEL);
1446         }
1447
1448 out:
1449         mvmvif->seqno_valid = true;
1450         /* +0x10 because the set API expects next-to-use, not last-used */
1451         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1452
1453         return true;
1454 }
1455
1456 /* releases the MVM mutex */
1457 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1458                                          struct ieee80211_vif *vif)
1459 {
1460         u32 base = mvm->error_event_table;
1461         struct error_table_start {
1462                 /* cf. struct iwl_error_event_table */
1463                 u32 valid;
1464                 u32 error_id;
1465         } err_info;
1466         struct iwl_host_cmd cmd = {
1467                 .id = WOWLAN_GET_STATUSES,
1468                 .flags = CMD_SYNC | CMD_WANT_SKB,
1469         };
1470         struct iwl_wowlan_status_data status;
1471         struct iwl_wowlan_status_v6 *status_v6;
1472         int ret, len, status_size, i;
1473         bool keep;
1474         struct ieee80211_sta *ap_sta;
1475         struct iwl_mvm_sta *mvm_ap_sta;
1476
1477         iwl_trans_read_mem_bytes(mvm->trans, base,
1478                                  &err_info, sizeof(err_info));
1479
1480         if (err_info.valid) {
1481                 IWL_INFO(mvm, "error table is valid (%d)\n",
1482                          err_info.valid);
1483                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1484                         struct cfg80211_wowlan_wakeup wakeup = {
1485                                 .rfkill_release = true,
1486                         };
1487                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1488                                                        GFP_KERNEL);
1489                 }
1490                 goto out_unlock;
1491         }
1492
1493         /* only for tracing for now */
1494         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
1495         if (ret)
1496                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1497
1498         ret = iwl_mvm_send_cmd(mvm, &cmd);
1499         if (ret) {
1500                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1501                 goto out_unlock;
1502         }
1503
1504         /* RF-kill already asserted again... */
1505         if (!cmd.resp_pkt)
1506                 goto out_unlock;
1507
1508         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API)
1509                 status_size = sizeof(struct iwl_wowlan_status_v6);
1510         else
1511                 status_size = sizeof(struct iwl_wowlan_status_v4);
1512
1513         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1514         if (len < status_size) {
1515                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1516                 goto out_free_resp;
1517         }
1518
1519         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_D3_CONTINUITY_API) {
1520                 status_v6 = (void *)cmd.resp_pkt->data;
1521
1522                 status.pattern_number = le16_to_cpu(status_v6->pattern_number);
1523                 for (i = 0; i < 8; i++)
1524                         status.qos_seq_ctr[i] =
1525                                 le16_to_cpu(status_v6->qos_seq_ctr[i]);
1526                 status.wakeup_reasons = le32_to_cpu(status_v6->wakeup_reasons);
1527                 status.wake_packet_length =
1528                         le32_to_cpu(status_v6->wake_packet_length);
1529                 status.wake_packet_bufsize =
1530                         le32_to_cpu(status_v6->wake_packet_bufsize);
1531                 status.wake_packet = status_v6->wake_packet;
1532         } else {
1533                 struct iwl_wowlan_status_v4 *status_v4;
1534                 status_v6 = NULL;
1535                 status_v4 = (void *)cmd.resp_pkt->data;
1536
1537                 status.pattern_number = le16_to_cpu(status_v4->pattern_number);
1538                 for (i = 0; i < 8; i++)
1539                         status.qos_seq_ctr[i] =
1540                                 le16_to_cpu(status_v4->qos_seq_ctr[i]);
1541                 status.wakeup_reasons = le32_to_cpu(status_v4->wakeup_reasons);
1542                 status.wake_packet_length =
1543                         le32_to_cpu(status_v4->wake_packet_length);
1544                 status.wake_packet_bufsize =
1545                         le32_to_cpu(status_v4->wake_packet_bufsize);
1546                 status.wake_packet = status_v4->wake_packet;
1547         }
1548
1549         if (len != status_size + ALIGN(status.wake_packet_bufsize, 4)) {
1550                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1551                 goto out_free_resp;
1552         }
1553
1554         /* still at hard-coded place 0 for D3 image */
1555         ap_sta = rcu_dereference_protected(
1556                         mvm->fw_id_to_mac_id[0],
1557                         lockdep_is_held(&mvm->mutex));
1558         if (IS_ERR_OR_NULL(ap_sta))
1559                 goto out_free_resp;
1560
1561         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
1562         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1563                 u16 seq = status.qos_seq_ctr[i];
1564                 /* firmware stores last-used value, we store next value */
1565                 seq += 0x10;
1566                 mvm_ap_sta->tid_data[i].seq_number = seq;
1567         }
1568
1569         /* now we have all the data we need, unlock to avoid mac80211 issues */
1570         mutex_unlock(&mvm->mutex);
1571
1572         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1573
1574         keep = iwl_mvm_setup_connection_keep(mvm, vif, status_v6);
1575
1576         iwl_free_resp(&cmd);
1577         return keep;
1578
1579  out_free_resp:
1580         iwl_free_resp(&cmd);
1581  out_unlock:
1582         mutex_unlock(&mvm->mutex);
1583         return false;
1584 }
1585
1586 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1587 {
1588 #ifdef CONFIG_IWLWIFI_DEBUGFS
1589         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1590         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1591         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1592
1593         if (!mvm->store_d3_resume_sram)
1594                 return;
1595
1596         if (!mvm->d3_resume_sram) {
1597                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1598                 if (!mvm->d3_resume_sram)
1599                         return;
1600         }
1601
1602         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1603 #endif
1604 }
1605
1606 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1607                                        struct ieee80211_vif *vif)
1608 {
1609         /* skip the one we keep connection on */
1610         if (data == vif)
1611                 return;
1612
1613         if (vif->type == NL80211_IFTYPE_STATION)
1614                 ieee80211_resume_disconnect(vif);
1615 }
1616
1617 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1618 {
1619         struct iwl_d3_iter_data resume_iter_data = {
1620                 .mvm = mvm,
1621         };
1622         struct ieee80211_vif *vif = NULL;
1623         int ret;
1624         enum iwl_d3_status d3_status;
1625         bool keep = false;
1626
1627         mutex_lock(&mvm->mutex);
1628
1629         /* get the BSS vif pointer again */
1630         ieee80211_iterate_active_interfaces_atomic(
1631                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1632                 iwl_mvm_d3_iface_iterator, &resume_iter_data);
1633
1634         if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
1635                 goto out_unlock;
1636
1637         vif = resume_iter_data.vif;
1638
1639         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1640         if (ret)
1641                 goto out_unlock;
1642
1643         if (d3_status != IWL_D3_STATUS_ALIVE) {
1644                 IWL_INFO(mvm, "Device was reset during suspend\n");
1645                 goto out_unlock;
1646         }
1647
1648         /* query SRAM first in case we want event logging */
1649         iwl_mvm_read_d3_sram(mvm);
1650
1651         keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1652 #ifdef CONFIG_IWLWIFI_DEBUGFS
1653         if (keep)
1654                 mvm->keep_vif = vif;
1655 #endif
1656         /* has unlocked the mutex, so skip that */
1657         goto out;
1658
1659  out_unlock:
1660         mutex_unlock(&mvm->mutex);
1661
1662  out:
1663         if (!test)
1664                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1665                         IEEE80211_IFACE_ITER_NORMAL,
1666                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1667
1668         /* return 1 to reconfigure the device */
1669         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1670         return 1;
1671 }
1672
1673 int iwl_mvm_resume(struct ieee80211_hw *hw)
1674 {
1675         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1676
1677         return __iwl_mvm_resume(mvm, false);
1678 }
1679
1680 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1681 {
1682         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1683
1684         device_set_wakeup_enable(mvm->trans->dev, enabled);
1685 }
1686
1687 #ifdef CONFIG_IWLWIFI_DEBUGFS
1688 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1689 {
1690         struct iwl_mvm *mvm = inode->i_private;
1691         int err;
1692
1693         if (mvm->d3_test_active)
1694                 return -EBUSY;
1695
1696         file->private_data = inode->i_private;
1697
1698         ieee80211_stop_queues(mvm->hw);
1699         synchronize_net();
1700
1701         /* start pseudo D3 */
1702         rtnl_lock();
1703         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1704         rtnl_unlock();
1705         if (err > 0)
1706                 err = -EINVAL;
1707         if (err) {
1708                 ieee80211_wake_queues(mvm->hw);
1709                 return err;
1710         }
1711         mvm->d3_test_active = true;
1712         mvm->keep_vif = NULL;
1713         return 0;
1714 }
1715
1716 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1717                                     size_t count, loff_t *ppos)
1718 {
1719         struct iwl_mvm *mvm = file->private_data;
1720         u32 pme_asserted;
1721
1722         while (true) {
1723                 /* read pme_ptr if available */
1724                 if (mvm->d3_test_pme_ptr) {
1725                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
1726                                                 mvm->d3_test_pme_ptr);
1727                         if (pme_asserted)
1728                                 break;
1729                 }
1730
1731                 if (msleep_interruptible(100))
1732                         break;
1733         }
1734
1735         return 0;
1736 }
1737
1738 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1739                                               struct ieee80211_vif *vif)
1740 {
1741         /* skip the one we keep connection on */
1742         if (_data == vif)
1743                 return;
1744
1745         if (vif->type == NL80211_IFTYPE_STATION)
1746                 ieee80211_connection_loss(vif);
1747 }
1748
1749 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1750 {
1751         struct iwl_mvm *mvm = inode->i_private;
1752         int remaining_time = 10;
1753
1754         mvm->d3_test_active = false;
1755         __iwl_mvm_resume(mvm, true);
1756         iwl_abort_notification_waits(&mvm->notif_wait);
1757         ieee80211_restart_hw(mvm->hw);
1758
1759         /* wait for restart and disconnect all interfaces */
1760         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1761                remaining_time > 0) {
1762                 remaining_time--;
1763                 msleep(1000);
1764         }
1765
1766         if (remaining_time == 0)
1767                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1768
1769         ieee80211_iterate_active_interfaces_atomic(
1770                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1771                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
1772
1773         ieee80211_wake_queues(mvm->hw);
1774
1775         return 0;
1776 }
1777
1778 const struct file_operations iwl_dbgfs_d3_test_ops = {
1779         .llseek = no_llseek,
1780         .open = iwl_mvm_d3_test_open,
1781         .read = iwl_mvm_d3_test_read,
1782         .release = iwl_mvm_d3_test_release,
1783 };
1784 #endif