drivers/net/wireless/iwlwifi/mvm/d3.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of version 2 of the GNU General Public License as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
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  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  23  * USA
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  26  * in the file called COPYING.
  27  *
  28  * Contact Information:
  29  *  Intel Linux Wireless <ilw@linux.intel.com>
  30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  31  *
  32  * BSD LICENSE
  33  *
  34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
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  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  *
  42  *  * Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  *  * Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in
  46  *    the documentation and/or other materials provided with the
  47  *    distribution.
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  49  *    contributors may be used to endorse or promote products derived
  50  *    from this software without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  63  *
  64  *****************************************************************************/
  65
  66 #include <linux/etherdevice.h>
  67 #include <linux/ip.h>
  68 #include <linux/fs.h>
  69 #include <net/cfg80211.h>
  70 #include <net/ipv6.h>
  71 #include <net/tcp.h>
  72 #include <net/addrconf.h>
  73 #include "iwl-modparams.h"
  74 #include "fw-api.h"
  75 #include "mvm.h"
  76
  77 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  78                             struct ieee80211_vif *vif,
  79                             struct cfg80211_gtk_rekey_data *data)
  80 {
  81         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  82         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  83
  84         if (iwlwifi_mod_params.sw_crypto)
  85                 return;
  86
  87         mutex_lock(&mvm->mutex);
  88
  89         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  90         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  91         mvmvif->rekey_data.replay_ctr =
  92                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
  93         mvmvif->rekey_data.valid = true;
  94
  95         mutex_unlock(&mvm->mutex);
  96 }
  97
  98 #if IS_ENABLED(CONFIG_IPV6)
  99 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
 100                               struct ieee80211_vif *vif,
 101                               struct inet6_dev *idev)
 102 {
 103         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 104         struct inet6_ifaddr *ifa;
 105         int idx = 0;
 106
 107         read_lock_bh(&idev->lock);
 108         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 109                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 110                 idx++;
 111                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
 112                         break;
 113         }
 114         read_unlock_bh(&idev->lock);
 115
 116         mvmvif->num_target_ipv6_addrs = idx;
 117 }
 118 #endif
 119
 120 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 121                                      struct ieee80211_vif *vif, int idx)
 122 {
 123         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 124
 125         mvmvif->tx_key_idx = idx;
 126 }
 127
 128 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 129 {
 130         int i;
 131
 132         for (i = 0; i < IWL_P1K_SIZE; i++)
 133                 out[i] = cpu_to_le16(p1k[i]);
 134 }
 135
 136 struct wowlan_key_data {
 137         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 138         struct iwl_wowlan_tkip_params_cmd *tkip;
 139         bool error, use_rsc_tsc, use_tkip;
 140         int wep_key_idx;
 141 };
 142
 143 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 144                                         struct ieee80211_vif *vif,
 145                                         struct ieee80211_sta *sta,
 146                                         struct ieee80211_key_conf *key,
 147                                         void *_data)
 148 {
 149         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 150         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 151         struct wowlan_key_data *data = _data;
 152         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 153         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 154         struct iwl_p1k_cache *rx_p1ks;
 155         u8 *rx_mic_key;
 156         struct ieee80211_key_seq seq;
 157         u32 cur_rx_iv32 = 0;
 158         u16 p1k[IWL_P1K_SIZE];
 159         int ret, i;
 160
 161         mutex_lock(&mvm->mutex);
 162
 163         switch (key->cipher) {
 164         case WLAN_CIPHER_SUITE_WEP40:
 165         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 166                 struct {
 167                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 168                         struct iwl_mvm_wep_key wep_key;
 169                 } __packed wkc = {
 170                         .wep_key_cmd.mac_id_n_color =
 171                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 172                                                                 mvmvif->color)),
 173                         .wep_key_cmd.num_keys = 1,
 174                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 175                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 176                         .wep_key.key_index = key->keyidx,
 177                         .wep_key.key_size = key->keylen,
 178                 };
 179
 180                 /*
 181                  * This will fail -- the key functions don't set support
 182                  * pairwise WEP keys. However, that's better than silently
 183                  * failing WoWLAN. Or maybe not?
 184                  */
 185                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 186                         break;
 187
 188                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 189                 if (key->keyidx == mvmvif->tx_key_idx) {
 190                         /* TX key must be at offset 0 */
 191                         wkc.wep_key.key_offset = 0;
 192                 } else {
 193                         /* others start at 1 */
 194                         data->wep_key_idx++;
 195                         wkc.wep_key.key_offset = data->wep_key_idx;
 196                 }
 197
 198                 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0, sizeof(wkc), &wkc);
 199                 data->error = ret != 0;
 200
 201                 mvm->ptk_ivlen = key->iv_len;
 202                 mvm->ptk_icvlen = key->icv_len;
 203                 mvm->gtk_ivlen = key->iv_len;
 204                 mvm->gtk_icvlen = key->icv_len;
 205
 206                 /* don't upload key again */
 207                 goto out_unlock;
 208         }
 209         default:
 210                 data->error = true;
 211                 goto out_unlock;
 212         case WLAN_CIPHER_SUITE_AES_CMAC:
 213                 /*
 214                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 215                  * but we also shouldn't abort suspend due to that. It does have
 216                  * support for the IGTK key renewal, but doesn't really use the
 217                  * IGTK for anything. This means we could spuriously wake up or
 218                  * be deauthenticated, but that was considered acceptable.
 219                  */
 220                 goto out_unlock;
 221         case WLAN_CIPHER_SUITE_TKIP:
 222                 if (sta) {
 223                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 224                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 225
 226                         rx_p1ks = data->tkip->rx_uni;
 227
 228                         ieee80211_get_key_tx_seq(key, &seq);
 229                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 230                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 231
 232                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 233                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 234
 235                         memcpy(data->tkip->mic_keys.tx,
 236                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 237                                IWL_MIC_KEY_SIZE);
 238
 239                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 240                 } else {
 241                         tkip_sc =
 242                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 243                         rx_p1ks = data->tkip->rx_multi;
 244                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 245                 }
 246
 247                 /*
 248                  * For non-QoS this relies on the fact that both the uCode and
 249                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 250                  * for checking the IV in the frames.
 251                  */
 252                 for (i = 0; i < IWL_NUM_RSC; i++) {
 253                         ieee80211_get_key_rx_seq(key, i, &seq);
 254                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 255                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 256                         /* wrapping isn't allowed, AP must rekey */
 257                         if (seq.tkip.iv32 > cur_rx_iv32)
 258                                 cur_rx_iv32 = seq.tkip.iv32;
 259                 }
 260
 261                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 262                                           cur_rx_iv32, p1k);
 263                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 264                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 265                                           cur_rx_iv32 + 1, p1k);
 266                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 267
 268                 memcpy(rx_mic_key,
 269                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 270                        IWL_MIC_KEY_SIZE);
 271
 272                 data->use_tkip = true;
 273                 data->use_rsc_tsc = true;
 274                 break;
 275         case WLAN_CIPHER_SUITE_CCMP:
 276                 if (sta) {
 277                         u8 *pn = seq.ccmp.pn;
 278
 279                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 280                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 281
 282                         ieee80211_get_key_tx_seq(key, &seq);
 283                         aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
 284                                                     ((u64)pn[4] << 8) |
 285                                                     ((u64)pn[3] << 16) |
 286                                                     ((u64)pn[2] << 24) |
 287                                                     ((u64)pn[1] << 32) |
 288                                                     ((u64)pn[0] << 40));
 289                 } else {
 290                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 291                 }
 292
 293                 /*
 294                  * For non-QoS this relies on the fact that both the uCode and
 295                  * mac80211 use TID 0 for checking the IV in the frames.
 296                  */
 297                 for (i = 0; i < IWL_NUM_RSC; i++) {
 298                         u8 *pn = seq.ccmp.pn;
 299
 300                         ieee80211_get_key_rx_seq(key, i, &seq);
 301                         aes_sc->pn = cpu_to_le64((u64)pn[5] |
 302                                                  ((u64)pn[4] << 8) |
 303                                                  ((u64)pn[3] << 16) |
 304                                                  ((u64)pn[2] << 24) |
 305                                                  ((u64)pn[1] << 32) |
 306                                                  ((u64)pn[0] << 40));
 307                 }
 308                 data->use_rsc_tsc = true;
 309                 break;
 310         }
 311
 312         /*
 313          * The D3 firmware hardcodes the key offset 0 as the key it uses
 314          * to transmit packets to the AP, i.e. the PTK.
 315          */
 316         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 317                 key->hw_key_idx = 0;
 318                 mvm->ptk_ivlen = key->iv_len;
 319                 mvm->ptk_icvlen = key->icv_len;
 320         } else {
 321                 /*
 322                  * firmware only supports TSC/RSC for a single key,
 323                  * so if there are multiple keep overwriting them
 324                  * with new ones -- this relies on mac80211 doing
 325                  * list_add_tail().
 326                  */
 327                 key->hw_key_idx = 1;
 328                 mvm->gtk_ivlen = key->iv_len;
 329                 mvm->gtk_icvlen = key->icv_len;
 330         }
 331
 332         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 333         data->error = ret != 0;
 334 out_unlock:
 335         mutex_unlock(&mvm->mutex);
 336 }
 337
 338 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 339                                  struct cfg80211_wowlan *wowlan)
 340 {
 341         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 342         struct iwl_host_cmd cmd = {
 343                 .id = WOWLAN_PATTERNS,
 344                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 345         };
 346         int i, err;
 347
 348         if (!wowlan->n_patterns)
 349                 return 0;
 350
 351         cmd.len[0] = sizeof(*pattern_cmd) +
 352                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 353
 354         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 355         if (!pattern_cmd)
 356                 return -ENOMEM;
 357
 358         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 359
 360         for (i = 0; i < wowlan->n_patterns; i++) {
 361                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 362
 363                 memcpy(&pattern_cmd->patterns[i].mask,
 364                        wowlan->patterns[i].mask, mask_len);
 365                 memcpy(&pattern_cmd->patterns[i].pattern,
 366                        wowlan->patterns[i].pattern,
 367                        wowlan->patterns[i].pattern_len);
 368                 pattern_cmd->patterns[i].mask_size = mask_len;
 369                 pattern_cmd->patterns[i].pattern_size =
 370                         wowlan->patterns[i].pattern_len;
 371         }
 372
 373         cmd.data[0] = pattern_cmd;
 374         err = iwl_mvm_send_cmd(mvm, &cmd);
 375         kfree(pattern_cmd);
 376         return err;
 377 }
 378
 379 enum iwl_mvm_tcp_packet_type {
 380         MVM_TCP_TX_SYN,
 381         MVM_TCP_RX_SYNACK,
 382         MVM_TCP_TX_DATA,
 383         MVM_TCP_RX_ACK,
 384         MVM_TCP_RX_WAKE,
 385         MVM_TCP_TX_FIN,
 386 };
 387
 388 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 389 {
 390         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 391         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 392 }
 393
 394 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
 395                                      struct cfg80211_wowlan_tcp *tcp,
 396                                      void *_pkt, u8 *mask,
 397                                      __le16 *pseudo_hdr_csum,
 398                                      enum iwl_mvm_tcp_packet_type ptype)
 399 {
 400         struct {
 401                 struct ethhdr eth;
 402                 struct iphdr ip;
 403                 struct tcphdr tcp;
 404                 u8 data[];
 405         } __packed *pkt = _pkt;
 406         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 407         int i;
 408
 409         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 410         pkt->ip.version = 4;
 411         pkt->ip.ihl = 5;
 412         pkt->ip.protocol = IPPROTO_TCP;
 413
 414         switch (ptype) {
 415         case MVM_TCP_TX_SYN:
 416         case MVM_TCP_TX_DATA:
 417         case MVM_TCP_TX_FIN:
 418                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 419                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 420                 pkt->ip.ttl = 128;
 421                 pkt->ip.saddr = tcp->src;
 422                 pkt->ip.daddr = tcp->dst;
 423                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 424                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 425                 /* overwritten for TX SYN later */
 426                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 427                 pkt->tcp.window = cpu_to_be16(65000);
 428                 break;
 429         case MVM_TCP_RX_SYNACK:
 430         case MVM_TCP_RX_ACK:
 431         case MVM_TCP_RX_WAKE:
 432                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 433                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 434                 pkt->ip.saddr = tcp->dst;
 435                 pkt->ip.daddr = tcp->src;
 436                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 437                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 438                 break;
 439         default:
 440                 WARN_ON(1);
 441                 return;
 442         }
 443
 444         switch (ptype) {
 445         case MVM_TCP_TX_SYN:
 446                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 447                 memset(pkt->data, 0x01, 8);
 448                 ip_tot_len += 8;
 449                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 450                 pkt->tcp.syn = 1;
 451                 break;
 452         case MVM_TCP_TX_DATA:
 453                 ip_tot_len += tcp->payload_len;
 454                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 455                 pkt->tcp.psh = 1;
 456                 pkt->tcp.ack = 1;
 457                 break;
 458         case MVM_TCP_TX_FIN:
 459                 pkt->tcp.fin = 1;
 460                 pkt->tcp.ack = 1;
 461                 break;
 462         case MVM_TCP_RX_SYNACK:
 463                 pkt->tcp.syn = 1;
 464                 pkt->tcp.ack = 1;
 465                 break;
 466         case MVM_TCP_RX_ACK:
 467                 pkt->tcp.ack = 1;
 468                 break;
 469         case MVM_TCP_RX_WAKE:
 470                 ip_tot_len += tcp->wake_len;
 471                 pkt->tcp.psh = 1;
 472                 pkt->tcp.ack = 1;
 473                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 474                 break;
 475         }
 476
 477         switch (ptype) {
 478         case MVM_TCP_TX_SYN:
 479         case MVM_TCP_TX_DATA:
 480         case MVM_TCP_TX_FIN:
 481                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 482                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 483                 break;
 484         case MVM_TCP_RX_WAKE:
 485                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 486                         u8 tmp = tcp->wake_mask[i];
 487                         mask[i + 6] |= tmp << 6;
 488                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 489                                 mask[i + 7] = tmp >> 2;
 490                 }
 491                 /* fall through for ethernet/IP/TCP headers mask */
 492         case MVM_TCP_RX_SYNACK:
 493         case MVM_TCP_RX_ACK:
 494                 mask[0] = 0xff; /* match ethernet */
 495                 /*
 496                  * match ethernet, ip.version, ip.ihl
 497                  * the ip.ihl half byte is really masked out by firmware
 498                  */
 499                 mask[1] = 0x7f;
 500                 mask[2] = 0x80; /* match ip.protocol */
 501                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 502                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 503                 mask[5] = 0x80; /* match tcp flags */
 504                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 505                 break;
 506         };
 507
 508         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 509                                             pkt->ip.saddr, pkt->ip.daddr);
 510 }
 511
 512 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 513                                         struct ieee80211_vif *vif,
 514                                         struct cfg80211_wowlan_tcp *tcp)
 515 {
 516         struct iwl_wowlan_remote_wake_config *cfg;
 517         struct iwl_host_cmd cmd = {
 518                 .id = REMOTE_WAKE_CONFIG_CMD,
 519                 .len = { sizeof(*cfg), },
 520                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 521         };
 522         int ret;
 523
 524         if (!tcp)
 525                 return 0;
 526
 527         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 528         if (!cfg)
 529                 return -ENOMEM;
 530         cmd.data[0] = cfg;
 531
 532         cfg->max_syn_retries = 10;
 533         cfg->max_data_retries = 10;
 534         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 535         cfg->tcp_ack_timeout = 1; /* seconds */
 536
 537         /* SYN (TX) */
 538         iwl_mvm_build_tcp_packet(
 539                 vif, tcp, cfg->syn_tx.data, NULL,
 540                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 541                 MVM_TCP_TX_SYN);
 542         cfg->syn_tx.info.tcp_payload_length = 0;
 543
 544         /* SYN/ACK (RX) */
 545         iwl_mvm_build_tcp_packet(
 546                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 547                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 548                 MVM_TCP_RX_SYNACK);
 549         cfg->synack_rx.info.tcp_payload_length = 0;
 550
 551         /* KEEPALIVE/ACK (TX) */
 552         iwl_mvm_build_tcp_packet(
 553                 vif, tcp, cfg->keepalive_tx.data, NULL,
 554                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 555                 MVM_TCP_TX_DATA);
 556         cfg->keepalive_tx.info.tcp_payload_length =
 557                 cpu_to_le16(tcp->payload_len);
 558         cfg->sequence_number_offset = tcp->payload_seq.offset;
 559         /* length must be 0..4, the field is little endian */
 560         cfg->sequence_number_length = tcp->payload_seq.len;
 561         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 562         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 563         if (tcp->payload_tok.len) {
 564                 cfg->token_offset = tcp->payload_tok.offset;
 565                 cfg->token_length = tcp->payload_tok.len;
 566                 cfg->num_tokens =
 567                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 568                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 569                        tcp->tokens_size);
 570         } else {
 571                 /* set tokens to max value to almost never run out */
 572                 cfg->num_tokens = cpu_to_le16(65535);
 573         }
 574
 575         /* ACK (RX) */
 576         iwl_mvm_build_tcp_packet(
 577                 vif, tcp, cfg->keepalive_ack_rx.data,
 578                 cfg->keepalive_ack_rx.rx_mask,
 579                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 580                 MVM_TCP_RX_ACK);
 581         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 582
 583         /* WAKEUP (RX) */
 584         iwl_mvm_build_tcp_packet(
 585                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 586                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 587                 MVM_TCP_RX_WAKE);
 588         cfg->wake_rx.info.tcp_payload_length =
 589                 cpu_to_le16(tcp->wake_len);
 590
 591         /* FIN */
 592         iwl_mvm_build_tcp_packet(
 593                 vif, tcp, cfg->fin_tx.data, NULL,
 594                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 595                 MVM_TCP_TX_FIN);
 596         cfg->fin_tx.info.tcp_payload_length = 0;
 597
 598         ret = iwl_mvm_send_cmd(mvm, &cmd);
 599         kfree(cfg);
 600
 601         return ret;
 602 }
 603
 604 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 605                                 struct ieee80211_sta *ap_sta)
 606 {
 607         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 608         struct ieee80211_chanctx_conf *ctx;
 609         u8 chains_static, chains_dynamic;
 610         struct cfg80211_chan_def chandef;
 611         int ret, i;
 612         struct iwl_binding_cmd binding_cmd = {};
 613         struct iwl_time_quota_cmd quota_cmd = {};
 614         u32 status;
 615
 616         /* add back the PHY */
 617         if (WARN_ON(!mvmvif->phy_ctxt))
 618                 return -EINVAL;
 619
 620         rcu_read_lock();
 621         ctx = rcu_dereference(vif->chanctx_conf);
 622         if (WARN_ON(!ctx)) {
 623                 rcu_read_unlock();
 624                 return -EINVAL;
 625         }
 626         chandef = ctx->def;
 627         chains_static = ctx->rx_chains_static;
 628         chains_dynamic = ctx->rx_chains_dynamic;
 629         rcu_read_unlock();
 630
 631         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 632                                    chains_static, chains_dynamic);
 633         if (ret)
 634                 return ret;
 635
 636         /* add back the MAC */
 637         mvmvif->uploaded = false;
 638
 639         if (WARN_ON(!vif->bss_conf.assoc))
 640                 return -EINVAL;
 641
 642         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 643         if (ret)
 644                 return ret;
 645
 646         /* add back binding - XXX refactor? */
 647         binding_cmd.id_and_color =
 648                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 649                                                 mvmvif->phy_ctxt->color));
 650         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 651         binding_cmd.phy =
 652                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 653                                                 mvmvif->phy_ctxt->color));
 654         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 655                                                               mvmvif->color));
 656         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 657                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 658
 659         status = 0;
 660         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 661                                           sizeof(binding_cmd), &binding_cmd,
 662                                           &status);
 663         if (ret) {
 664                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 665                 return ret;
 666         }
 667
 668         if (status) {
 669                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 670                 return -EIO;
 671         }
 672
 673         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 674         if (ret)
 675                 return ret;
 676         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 677
 678         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
 679         if (ret)
 680                 return ret;
 681
 682         /* and some quota */
 683         quota_cmd.quotas[0].id_and_color =
 684                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 685                                                 mvmvif->phy_ctxt->color));
 686         quota_cmd.quotas[0].quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 687         quota_cmd.quotas[0].max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 688
 689         for (i = 1; i < MAX_BINDINGS; i++)
 690                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 691
 692         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 693                                    sizeof(quota_cmd), &quota_cmd);
 694         if (ret)
 695                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 696
 697         return 0;
 698 }
 699
 700 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 701                                        struct ieee80211_vif *vif)
 702 {
 703         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 704         struct iwl_nonqos_seq_query_cmd query_cmd = {
 705                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 706                 .mac_id_n_color =
 707                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 708                                                         mvmvif->color)),
 709         };
 710         struct iwl_host_cmd cmd = {
 711                 .id = NON_QOS_TX_COUNTER_CMD,
 712                 .flags = CMD_WANT_SKB,
 713         };
 714         int err;
 715         u32 size;
 716
 717         cmd.data[0] = &query_cmd;
 718         cmd.len[0] = sizeof(query_cmd);
 719
 720         err = iwl_mvm_send_cmd(mvm, &cmd);
 721         if (err)
 722                 return err;
 723
 724         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 725         if (size < sizeof(__le16)) {
 726                 err = -EINVAL;
 727         } else {
 728                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 729                 /* firmware returns next, not last-used seqno */
 730                 err = (u16) (err - 0x10);
 731         }
 732
 733         iwl_free_resp(&cmd);
 734         return err;
 735 }
 736
 737 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 738 {
 739         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 740         struct iwl_nonqos_seq_query_cmd query_cmd = {
 741                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 742                 .mac_id_n_color =
 743                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 744                                                         mvmvif->color)),
 745                 .value = cpu_to_le16(mvmvif->seqno),
 746         };
 747
 748         /* return if called during restart, not resume from D3 */
 749         if (!mvmvif->seqno_valid)
 750                 return;
 751
 752         mvmvif->seqno_valid = false;
 753
 754         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 755                                  sizeof(query_cmd), &query_cmd))
 756                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 757 }
 758
 759 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 760 {
 761         iwl_mvm_cancel_scan(mvm);
 762
 763         iwl_trans_stop_device(mvm->trans);
 764
 765         /*
 766          * Set the HW restart bit -- this is mostly true as we're
 767          * going to load new firmware and reprogram that, though
 768          * the reprogramming is going to be manual to avoid adding
 769          * all the MACs that aren't support.
 770          * We don't have to clear up everything though because the
 771          * reprogramming is manual. When we resume, we'll actually
 772          * go through a proper restart sequence again to switch
 773          * back to the runtime firmware image.
 774          */
 775         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 776
 777         /* We reprogram keys and shouldn't allocate new key indices */
 778         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 779
 780         mvm->ptk_ivlen = 0;
 781         mvm->ptk_icvlen = 0;
 782         mvm->ptk_ivlen = 0;
 783         mvm->ptk_icvlen = 0;
 784
 785         return iwl_mvm_load_d3_fw(mvm);
 786 }
 787
 788 static int
 789 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 790                           struct cfg80211_wowlan *wowlan,
 791                           struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 792                           struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 793                           struct ieee80211_sta *ap_sta)
 794 {
 795         int ret;
 796         struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 797
 798         /* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */
 799
 800         wowlan_config_cmd->is_11n_connection =
 801                                         ap_sta->ht_cap.ht_supported;
 802
 803         /* Query the last used seqno and set it */
 804         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 805         if (ret < 0)
 806                 return ret;
 807
 808         wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret);
 809
 810         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd);
 811
 812         if (wowlan->disconnect)
 813                 wowlan_config_cmd->wakeup_filter |=
 814                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 815                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 816         if (wowlan->magic_pkt)
 817                 wowlan_config_cmd->wakeup_filter |=
 818                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 819         if (wowlan->gtk_rekey_failure)
 820                 wowlan_config_cmd->wakeup_filter |=
 821                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 822         if (wowlan->eap_identity_req)
 823                 wowlan_config_cmd->wakeup_filter |=
 824                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 825         if (wowlan->four_way_handshake)
 826                 wowlan_config_cmd->wakeup_filter |=
 827                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 828         if (wowlan->n_patterns)
 829                 wowlan_config_cmd->wakeup_filter |=
 830                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 831
 832         if (wowlan->rfkill_release)
 833                 wowlan_config_cmd->wakeup_filter |=
 834                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 835
 836         if (wowlan->tcp) {
 837                 /*
 838                  * Set the "link change" (really "link lost") flag as well
 839                  * since that implies losing the TCP connection.
 840                  */
 841                 wowlan_config_cmd->wakeup_filter |=
 842                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 843                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 844                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 845                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 846         }
 847
 848         return 0;
 849 }
 850
 851 static int
 852 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
 853                       struct cfg80211_wowlan *wowlan,
 854                       struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 855                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 856                       struct ieee80211_sta *ap_sta)
 857 {
 858         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 859         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 860         struct wowlan_key_data key_data = {
 861                 .use_rsc_tsc = false,
 862                 .tkip = &tkip_cmd,
 863                 .use_tkip = false,
 864         };
 865         int ret;
 866
 867         ret = iwl_mvm_switch_to_d3(mvm);
 868         if (ret)
 869                 return ret;
 870
 871         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 872         if (ret)
 873                 return ret;
 874
 875         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 876         if (!key_data.rsc_tsc)
 877                 return -ENOMEM;
 878
 879         if (!iwlwifi_mod_params.sw_crypto) {
 880                 /*
 881                  * This needs to be unlocked due to lock ordering
 882                  * constraints. Since we're in the suspend path
 883                  * that isn't really a problem though.
 884                  */
 885                 mutex_unlock(&mvm->mutex);
 886                 ieee80211_iter_keys(mvm->hw, vif,
 887                                     iwl_mvm_wowlan_program_keys,
 888                                     &key_data);
 889                 mutex_lock(&mvm->mutex);
 890                 if (key_data.error) {
 891                         ret = -EIO;
 892                         goto out;
 893                 }
 894
 895                 if (key_data.use_rsc_tsc) {
 896                         struct iwl_host_cmd rsc_tsc_cmd = {
 897                                 .id = WOWLAN_TSC_RSC_PARAM,
 898                                 .data[0] = key_data.rsc_tsc,
 899                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 900                                 .len[0] = sizeof(*key_data.rsc_tsc),
 901                         };
 902
 903                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 904                         if (ret)
 905                                 goto out;
 906                 }
 907
 908                 if (key_data.use_tkip) {
 909                         ret = iwl_mvm_send_cmd_pdu(mvm,
 910                                                    WOWLAN_TKIP_PARAM,
 911                                                    0, sizeof(tkip_cmd),
 912                                                    &tkip_cmd);
 913                         if (ret)
 914                                 goto out;
 915                 }
 916
 917                 if (mvmvif->rekey_data.valid) {
 918                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 919                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 920                                NL80211_KCK_LEN);
 921                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 922                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 923                                NL80211_KEK_LEN);
 924                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 925                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 926
 927                         ret = iwl_mvm_send_cmd_pdu(mvm,
 928                                                    WOWLAN_KEK_KCK_MATERIAL, 0,
 929                                                    sizeof(kek_kck_cmd),
 930                                                    &kek_kck_cmd);
 931                         if (ret)
 932                                 goto out;
 933                 }
 934         }
 935
 936         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 937                                    sizeof(*wowlan_config_cmd),
 938                                    wowlan_config_cmd);
 939         if (ret)
 940                 goto out;
 941
 942         ret = iwl_mvm_send_patterns(mvm, wowlan);
 943         if (ret)
 944                 goto out;
 945
 946         ret = iwl_mvm_send_proto_offload(mvm, vif, false, 0);
 947         if (ret)
 948                 goto out;
 949
 950         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
 951
 952 out:
 953         kfree(key_data.rsc_tsc);
 954         return ret;
 955 }
 956
 957 static int
 958 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
 959                          struct cfg80211_wowlan *wowlan,
 960                          struct cfg80211_sched_scan_request *nd_config,
 961                          struct ieee80211_vif *vif)
 962 {
 963         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 964         int ret;
 965
 966         ret = iwl_mvm_switch_to_d3(mvm);
 967         if (ret)
 968                 return ret;
 969
 970         /* rfkill release can be either for wowlan or netdetect */
 971         if (wowlan->rfkill_release)
 972                 wowlan_config_cmd.wakeup_filter |=
 973                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 974
 975         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 976                                    sizeof(wowlan_config_cmd),
 977                                    &wowlan_config_cmd);
 978         if (ret)
 979                 return ret;
 980
 981         ret = iwl_mvm_scan_offload_start(mvm, vif, nd_config, &mvm->nd_ies);
 982         if (ret)
 983                 return ret;
 984
 985         if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
 986                 return -EBUSY;
 987
 988         /* save the sched scan matchsets... */
 989         if (nd_config->n_match_sets) {
 990                 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
 991                                              sizeof(*nd_config->match_sets) *
 992                                              nd_config->n_match_sets,
 993                                              GFP_KERNEL);
 994                 if (mvm->nd_match_sets)
 995                         mvm->n_nd_match_sets = nd_config->n_match_sets;
 996         }
 997
 998         /* ...and the sched scan channels for later reporting */
 999         mvm->nd_channels = kmemdup(nd_config->channels,
1000                                    sizeof(*nd_config->channels) *
1001                                    nd_config->n_channels,
1002                                    GFP_KERNEL);
1003         if (mvm->nd_channels)
1004                 mvm->n_nd_channels = nd_config->n_channels;
1005
1006         return 0;
1007 }
1008
1009 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
1010 {
1011         kfree(mvm->nd_match_sets);
1012         mvm->nd_match_sets = NULL;
1013         mvm->n_nd_match_sets = 0;
1014         kfree(mvm->nd_channels);
1015         mvm->nd_channels = NULL;
1016         mvm->n_nd_channels = 0;
1017 }
1018
1019 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
1020                              struct cfg80211_wowlan *wowlan,
1021                              bool test)
1022 {
1023         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1024         struct ieee80211_vif *vif = NULL;
1025         struct iwl_mvm_vif *mvmvif = NULL;
1026         struct ieee80211_sta *ap_sta = NULL;
1027         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1028                 /*
1029                  * Program the minimum sleep time to 10 seconds, as many
1030                  * platforms have issues processing a wakeup signal while
1031                  * still being in the process of suspending.
1032                  */
1033                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1034         };
1035         struct iwl_host_cmd d3_cfg_cmd = {
1036                 .id = D3_CONFIG_CMD,
1037                 .flags = CMD_WANT_SKB,
1038                 .data[0] = &d3_cfg_cmd_data,
1039                 .len[0] = sizeof(d3_cfg_cmd_data),
1040         };
1041         int ret;
1042         int len __maybe_unused;
1043
1044         if (!wowlan) {
1045                 /*
1046                  * mac80211 shouldn't get here, but for D3 test
1047                  * it doesn't warrant a warning
1048                  */
1049                 WARN_ON(!test);
1050                 return -EINVAL;
1051         }
1052
1053         mutex_lock(&mvm->mutex);
1054
1055         vif = iwl_mvm_get_bss_vif(mvm);
1056         if (IS_ERR_OR_NULL(vif)) {
1057                 ret = 1;
1058                 goto out_noreset;
1059         }
1060
1061         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1062
1063         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) {
1064                 /* if we're not associated, this must be netdetect */
1065                 if (!wowlan->nd_config && !mvm->nd_config) {
1066                         ret = 1;
1067                         goto out_noreset;
1068                 }
1069
1070                 ret = iwl_mvm_netdetect_config(
1071                         mvm, wowlan, wowlan->nd_config ?: mvm->nd_config, vif);
1072                 if (ret)
1073                         goto out;
1074
1075                 mvm->net_detect = true;
1076         } else {
1077                 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1078
1079                 ap_sta = rcu_dereference_protected(
1080                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1081                         lockdep_is_held(&mvm->mutex));
1082                 if (IS_ERR_OR_NULL(ap_sta)) {
1083                         ret = -EINVAL;
1084                         goto out_noreset;
1085                 }
1086
1087                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1088                                                 vif, mvmvif, ap_sta);
1089                 if (ret)
1090                         goto out_noreset;
1091                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1092                                             vif, mvmvif, ap_sta);
1093                 if (ret)
1094                         goto out;
1095
1096                 mvm->net_detect = false;
1097         }
1098
1099         ret = iwl_mvm_power_update_device(mvm);
1100         if (ret)
1101                 goto out;
1102
1103         ret = iwl_mvm_power_update_mac(mvm);
1104         if (ret)
1105                 goto out;
1106
1107 #ifdef CONFIG_IWLWIFI_DEBUGFS
1108         if (mvm->d3_wake_sysassert)
1109                 d3_cfg_cmd_data.wakeup_flags |=
1110                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1111 #endif
1112
1113         /* must be last -- this switches firmware state */
1114         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1115         if (ret)
1116                 goto out;
1117 #ifdef CONFIG_IWLWIFI_DEBUGFS
1118         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1119         if (len >= sizeof(u32)) {
1120                 mvm->d3_test_pme_ptr =
1121                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1122         }
1123 #endif
1124         iwl_free_resp(&d3_cfg_cmd);
1125
1126         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1127
1128         iwl_trans_d3_suspend(mvm->trans, test);
1129  out:
1130         if (ret < 0) {
1131                 ieee80211_restart_hw(mvm->hw);
1132                 iwl_mvm_free_nd(mvm);
1133         }
1134  out_noreset:
1135         mutex_unlock(&mvm->mutex);
1136
1137         return ret;
1138 }
1139
1140 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1141 {
1142         struct iwl_notification_wait wait_d3;
1143         static const u8 d3_notif[] = { D3_CONFIG_CMD };
1144         int ret;
1145
1146         iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1147                                    d3_notif, ARRAY_SIZE(d3_notif),
1148                                    NULL, NULL);
1149
1150         ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1151         if (ret)
1152                 goto remove_notif;
1153
1154         ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1155         WARN_ON_ONCE(ret);
1156         return ret;
1157
1158 remove_notif:
1159         iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1160         return ret;
1161 }
1162
1163 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1164 {
1165         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1166
1167         iwl_trans_suspend(mvm->trans);
1168         if (wowlan->any) {
1169                 /* 'any' trigger means d0i3 usage */
1170                 if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) {
1171                         int ret = iwl_mvm_enter_d0i3_sync(mvm);
1172
1173                         if (ret)
1174                                 return ret;
1175                 }
1176
1177                 mutex_lock(&mvm->d0i3_suspend_mutex);
1178                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1179                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1180                 return 0;
1181         }
1182
1183         return __iwl_mvm_suspend(hw, wowlan, false);
1184 }
1185
1186 /* converted data from the different status responses */
1187 struct iwl_wowlan_status_data {
1188         u16 pattern_number;
1189         u16 qos_seq_ctr[8];
1190         u32 wakeup_reasons;
1191         u32 wake_packet_length;
1192         u32 wake_packet_bufsize;
1193         const u8 *wake_packet;
1194 };
1195
1196 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1197                                           struct ieee80211_vif *vif,
1198                                           struct iwl_wowlan_status_data *status)
1199 {
1200         struct sk_buff *pkt = NULL;
1201         struct cfg80211_wowlan_wakeup wakeup = {
1202                 .pattern_idx = -1,
1203         };
1204         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1205         u32 reasons = status->wakeup_reasons;
1206
1207         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1208                 wakeup_report = NULL;
1209                 goto report;
1210         }
1211
1212         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1213                 wakeup.magic_pkt = true;
1214
1215         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1216                 wakeup.pattern_idx =
1217                         status->pattern_number;
1218
1219         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1220                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1221                 wakeup.disconnect = true;
1222
1223         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1224                 wakeup.gtk_rekey_failure = true;
1225
1226         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1227                 wakeup.rfkill_release = true;
1228
1229         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1230                 wakeup.eap_identity_req = true;
1231
1232         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1233                 wakeup.four_way_handshake = true;
1234
1235         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1236                 wakeup.tcp_connlost = true;
1237
1238         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1239                 wakeup.tcp_nomoretokens = true;
1240
1241         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1242                 wakeup.tcp_match = true;
1243
1244         if (status->wake_packet_bufsize) {
1245                 int pktsize = status->wake_packet_bufsize;
1246                 int pktlen = status->wake_packet_length;
1247                 const u8 *pktdata = status->wake_packet;
1248                 struct ieee80211_hdr *hdr = (void *)pktdata;
1249                 int truncated = pktlen - pktsize;
1250
1251                 /* this would be a firmware bug */
1252                 if (WARN_ON_ONCE(truncated < 0))
1253                         truncated = 0;
1254
1255                 if (ieee80211_is_data(hdr->frame_control)) {
1256                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1257                         int ivlen = 0, icvlen = 4; /* also FCS */
1258
1259                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1260                         if (!pkt)
1261                                 goto report;
1262
1263                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1264                         pktdata += hdrlen;
1265                         pktsize -= hdrlen;
1266
1267                         if (ieee80211_has_protected(hdr->frame_control)) {
1268                                 /*
1269                                  * This is unlocked and using gtk_i(c)vlen,
1270                                  * but since everything is under RTNL still
1271                                  * that's not really a problem - changing
1272                                  * it would be difficult.
1273                                  */
1274                                 if (is_multicast_ether_addr(hdr->addr1)) {
1275                                         ivlen = mvm->gtk_ivlen;
1276                                         icvlen += mvm->gtk_icvlen;
1277                                 } else {
1278                                         ivlen = mvm->ptk_ivlen;
1279                                         icvlen += mvm->ptk_icvlen;
1280                                 }
1281                         }
1282
1283                         /* if truncated, FCS/ICV is (partially) gone */
1284                         if (truncated >= icvlen) {
1285                                 icvlen = 0;
1286                                 truncated -= icvlen;
1287                         } else {
1288                                 icvlen -= truncated;
1289                                 truncated = 0;
1290                         }
1291
1292                         pktsize -= ivlen + icvlen;
1293                         pktdata += ivlen;
1294
1295                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1296
1297                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1298                                 goto report;
1299                         wakeup.packet = pkt->data;
1300                         wakeup.packet_present_len = pkt->len;
1301                         wakeup.packet_len = pkt->len - truncated;
1302                         wakeup.packet_80211 = false;
1303                 } else {
1304                         int fcslen = 4;
1305
1306                         if (truncated >= 4) {
1307                                 truncated -= 4;
1308                                 fcslen = 0;
1309                         } else {
1310                                 fcslen -= truncated;
1311                                 truncated = 0;
1312                         }
1313                         pktsize -= fcslen;
1314                         wakeup.packet = status->wake_packet;
1315                         wakeup.packet_present_len = pktsize;
1316                         wakeup.packet_len = pktlen - truncated;
1317                         wakeup.packet_80211 = true;
1318                 }
1319         }
1320
1321  report:
1322         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1323         kfree_skb(pkt);
1324 }
1325
1326 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1327                                   struct ieee80211_key_seq *seq)
1328 {
1329         u64 pn;
1330
1331         pn = le64_to_cpu(sc->pn);
1332         seq->ccmp.pn[0] = pn >> 40;
1333         seq->ccmp.pn[1] = pn >> 32;
1334         seq->ccmp.pn[2] = pn >> 24;
1335         seq->ccmp.pn[3] = pn >> 16;
1336         seq->ccmp.pn[4] = pn >> 8;
1337         seq->ccmp.pn[5] = pn;
1338 }
1339
1340 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1341                                    struct ieee80211_key_seq *seq)
1342 {
1343         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1344         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1345 }
1346
1347 static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs,
1348                                    struct ieee80211_key_conf *key)
1349 {
1350         int tid;
1351
1352         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1353
1354         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1355                 struct ieee80211_key_seq seq = {};
1356
1357                 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1358                 ieee80211_set_key_rx_seq(key, tid, &seq);
1359         }
1360 }
1361
1362 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1363                                     struct ieee80211_key_conf *key)
1364 {
1365         int tid;
1366
1367         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1368
1369         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1370                 struct ieee80211_key_seq seq = {};
1371
1372                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1373                 ieee80211_set_key_rx_seq(key, tid, &seq);
1374         }
1375 }
1376
1377 static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key,
1378                                    struct iwl_wowlan_status *status)
1379 {
1380         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1381
1382         switch (key->cipher) {
1383         case WLAN_CIPHER_SUITE_CCMP:
1384                 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key);
1385                 break;
1386         case WLAN_CIPHER_SUITE_TKIP:
1387                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1388                 break;
1389         default:
1390                 WARN_ON(1);
1391         }
1392 }
1393
1394 struct iwl_mvm_d3_gtk_iter_data {
1395         struct iwl_wowlan_status *status;
1396         void *last_gtk;
1397         u32 cipher;
1398         bool find_phase, unhandled_cipher;
1399         int num_keys;
1400 };
1401
1402 static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw,
1403                                    struct ieee80211_vif *vif,
1404                                    struct ieee80211_sta *sta,
1405                                    struct ieee80211_key_conf *key,
1406                                    void *_data)
1407 {
1408         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1409
1410         if (data->unhandled_cipher)
1411                 return;
1412
1413         switch (key->cipher) {
1414         case WLAN_CIPHER_SUITE_WEP40:
1415         case WLAN_CIPHER_SUITE_WEP104:
1416                 /* ignore WEP completely, nothing to do */
1417                 return;
1418         case WLAN_CIPHER_SUITE_CCMP:
1419         case WLAN_CIPHER_SUITE_TKIP:
1420                 /* we support these */
1421                 break;
1422         default:
1423                 /* everything else (even CMAC for MFP) - disconnect from AP */
1424                 data->unhandled_cipher = true;
1425                 return;
1426         }
1427
1428         data->num_keys++;
1429
1430         /*
1431          * pairwise key - update sequence counters only;
1432          * note that this assumes no TDLS sessions are active
1433          */
1434         if (sta) {
1435                 struct ieee80211_key_seq seq = {};
1436                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1437
1438                 if (data->find_phase)
1439                         return;
1440
1441                 switch (key->cipher) {
1442                 case WLAN_CIPHER_SUITE_CCMP:
1443                         iwl_mvm_aes_sc_to_seq(&sc->aes.tsc, &seq);
1444                         iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key);
1445                         break;
1446                 case WLAN_CIPHER_SUITE_TKIP:
1447                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1448                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1449                         break;
1450                 }
1451                 ieee80211_set_key_tx_seq(key, &seq);
1452
1453                 /* that's it for this key */
1454                 return;
1455         }
1456
1457         if (data->find_phase) {
1458                 data->last_gtk = key;
1459                 data->cipher = key->cipher;
1460                 return;
1461         }
1462
1463         if (data->status->num_of_gtk_rekeys)
1464                 ieee80211_remove_key(key);
1465         else if (data->last_gtk == key)
1466                 iwl_mvm_set_key_rx_seq(key, data->status);
1467 }
1468
1469 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1470                                           struct ieee80211_vif *vif,
1471                                           struct iwl_wowlan_status *status)
1472 {
1473         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1474         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1475                 .status = status,
1476         };
1477         u32 disconnection_reasons =
1478                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1479                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1480
1481         if (!status || !vif->bss_conf.bssid)
1482                 return false;
1483
1484         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1485                 return false;
1486
1487         /* find last GTK that we used initially, if any */
1488         gtkdata.find_phase = true;
1489         ieee80211_iter_keys(mvm->hw, vif,
1490                             iwl_mvm_d3_update_gtks, &gtkdata);
1491         /* not trying to keep connections with MFP/unhandled ciphers */
1492         if (gtkdata.unhandled_cipher)
1493                 return false;
1494         if (!gtkdata.num_keys)
1495                 goto out;
1496         if (!gtkdata.last_gtk)
1497                 return false;
1498
1499         /*
1500          * invalidate all other GTKs that might still exist and update
1501          * the one that we used
1502          */
1503         gtkdata.find_phase = false;
1504         ieee80211_iter_keys(mvm->hw, vif,
1505                             iwl_mvm_d3_update_gtks, &gtkdata);
1506
1507         if (status->num_of_gtk_rekeys) {
1508                 struct ieee80211_key_conf *key;
1509                 struct {
1510                         struct ieee80211_key_conf conf;
1511                         u8 key[32];
1512                 } conf = {
1513                         .conf.cipher = gtkdata.cipher,
1514                         .conf.keyidx = status->gtk.key_index,
1515                 };
1516
1517                 switch (gtkdata.cipher) {
1518                 case WLAN_CIPHER_SUITE_CCMP:
1519                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1520                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1521                                WLAN_KEY_LEN_CCMP);
1522                         break;
1523                 case WLAN_CIPHER_SUITE_TKIP:
1524                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1525                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1526                         /* leave TX MIC key zeroed, we don't use it anyway */
1527                         memcpy(conf.conf.key +
1528                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1529                                status->gtk.tkip_mic_key, 8);
1530                         break;
1531                 }
1532
1533                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1534                 if (IS_ERR(key))
1535                         return false;
1536                 iwl_mvm_set_key_rx_seq(key, status);
1537         }
1538
1539         if (status->num_of_gtk_rekeys) {
1540                 __be64 replay_ctr =
1541                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1542                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1543                                            (void *)&replay_ctr, GFP_KERNEL);
1544         }
1545
1546 out:
1547         mvmvif->seqno_valid = true;
1548         /* +0x10 because the set API expects next-to-use, not last-used */
1549         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1550
1551         return true;
1552 }
1553
1554 static struct iwl_wowlan_status *
1555 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1556 {
1557         u32 base = mvm->error_event_table;
1558         struct error_table_start {
1559                 /* cf. struct iwl_error_event_table */
1560                 u32 valid;
1561                 u32 error_id;
1562         } err_info;
1563         struct iwl_host_cmd cmd = {
1564                 .id = WOWLAN_GET_STATUSES,
1565                 .flags = CMD_WANT_SKB,
1566         };
1567         struct iwl_wowlan_status *status, *fw_status;
1568         int ret, len, status_size;
1569
1570         iwl_trans_read_mem_bytes(mvm->trans, base,
1571                                  &err_info, sizeof(err_info));
1572
1573         if (err_info.valid) {
1574                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1575                          err_info.valid, err_info.error_id);
1576                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1577                         struct cfg80211_wowlan_wakeup wakeup = {
1578                                 .rfkill_release = true,
1579                         };
1580                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1581                                                        GFP_KERNEL);
1582                 }
1583                 return ERR_PTR(-EIO);
1584         }
1585
1586         /* only for tracing for now */
1587         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1588         if (ret)
1589                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1590
1591         ret = iwl_mvm_send_cmd(mvm, &cmd);
1592         if (ret) {
1593                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1594                 return ERR_PTR(ret);
1595         }
1596
1597         /* RF-kill already asserted again... */
1598         if (!cmd.resp_pkt) {
1599                 ret = -ERFKILL;
1600                 goto out_free_resp;
1601         }
1602
1603         status_size = sizeof(*fw_status);
1604
1605         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1606         if (len < status_size) {
1607                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1608                 ret = -EIO;
1609                 goto out_free_resp;
1610         }
1611
1612         status = (void *)cmd.resp_pkt->data;
1613         if (len != (status_size +
1614                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1615                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1616                 ret = -EIO;
1617                 goto out_free_resp;
1618         }
1619
1620         fw_status = kmemdup(status, len, GFP_KERNEL);
1621
1622 out_free_resp:
1623         iwl_free_resp(&cmd);
1624         return ret ? ERR_PTR(ret) : fw_status;
1625 }
1626
1627 /* releases the MVM mutex */
1628 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1629                                          struct ieee80211_vif *vif)
1630 {
1631         struct iwl_wowlan_status_data status;
1632         struct iwl_wowlan_status *fw_status;
1633         int i;
1634         bool keep;
1635         struct ieee80211_sta *ap_sta;
1636         struct iwl_mvm_sta *mvm_ap_sta;
1637
1638         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1639         if (IS_ERR_OR_NULL(fw_status))
1640                 goto out_unlock;
1641
1642         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1643         for (i = 0; i < 8; i++)
1644                 status.qos_seq_ctr[i] =
1645                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1646         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1647         status.wake_packet_length =
1648                 le32_to_cpu(fw_status->wake_packet_length);
1649         status.wake_packet_bufsize =
1650                 le32_to_cpu(fw_status->wake_packet_bufsize);
1651         status.wake_packet = fw_status->wake_packet;
1652
1653         /* still at hard-coded place 0 for D3 image */
1654         ap_sta = rcu_dereference_protected(
1655                         mvm->fw_id_to_mac_id[0],
1656                         lockdep_is_held(&mvm->mutex));
1657         if (IS_ERR_OR_NULL(ap_sta))
1658                 goto out_free;
1659
1660         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1661         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1662                 u16 seq = status.qos_seq_ctr[i];
1663                 /* firmware stores last-used value, we store next value */
1664                 seq += 0x10;
1665                 mvm_ap_sta->tid_data[i].seq_number = seq;
1666         }
1667
1668         /* now we have all the data we need, unlock to avoid mac80211 issues */
1669         mutex_unlock(&mvm->mutex);
1670
1671         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1672
1673         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1674
1675         kfree(fw_status);
1676         return keep;
1677
1678 out_free:
1679         kfree(fw_status);
1680 out_unlock:
1681         mutex_unlock(&mvm->mutex);
1682         return false;
1683 }
1684
1685 struct iwl_mvm_nd_query_results {
1686         u32 matched_profiles;
1687         struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1688 };
1689
1690 static int
1691 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1692                                 struct iwl_mvm_nd_query_results *results)
1693 {
1694         struct iwl_scan_offload_profiles_query *query;
1695         struct iwl_host_cmd cmd = {
1696                 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1697                 .flags = CMD_WANT_SKB,
1698         };
1699         int ret, len;
1700
1701         ret = iwl_mvm_send_cmd(mvm, &cmd);
1702         if (ret) {
1703                 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1704                 return ret;
1705         }
1706
1707         /* RF-kill already asserted again... */
1708         if (!cmd.resp_pkt) {
1709                 ret = -ERFKILL;
1710                 goto out_free_resp;
1711         }
1712
1713         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1714         if (len < sizeof(*query)) {
1715                 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1716                 ret = -EIO;
1717                 goto out_free_resp;
1718         }
1719
1720         query = (void *)cmd.resp_pkt->data;
1721
1722         results->matched_profiles = le32_to_cpu(query->matched_profiles);
1723         memcpy(results->matches, query->matches, sizeof(results->matches));
1724
1725 out_free_resp:
1726         iwl_free_resp(&cmd);
1727         return ret;
1728 }
1729
1730 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1731                                             struct ieee80211_vif *vif)
1732 {
1733         struct cfg80211_wowlan_nd_info *net_detect = NULL;
1734         struct cfg80211_wowlan_wakeup wakeup = {
1735                 .pattern_idx = -1,
1736         };
1737         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1738         struct iwl_mvm_nd_query_results query;
1739         struct iwl_wowlan_status *fw_status;
1740         unsigned long matched_profiles;
1741         u32 reasons = 0;
1742         int i, j, n_matches, ret;
1743
1744         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1745         if (!IS_ERR_OR_NULL(fw_status))
1746                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1747
1748         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1749                 wakeup.rfkill_release = true;
1750
1751         if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1752                 goto out;
1753
1754         ret = iwl_mvm_netdetect_query_results(mvm, &query);
1755         if (ret || !query.matched_profiles) {
1756                 wakeup_report = NULL;
1757                 goto out;
1758         }
1759
1760         matched_profiles = query.matched_profiles;
1761         if (mvm->n_nd_match_sets) {
1762                 n_matches = hweight_long(matched_profiles);
1763         } else {
1764                 IWL_ERR(mvm, "no net detect match information available\n");
1765                 n_matches = 0;
1766         }
1767
1768         net_detect = kzalloc(sizeof(*net_detect) +
1769                              (n_matches * sizeof(net_detect->matches[0])),
1770                              GFP_KERNEL);
1771         if (!net_detect || !n_matches)
1772                 goto out_report_nd;
1773
1774         for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1775                 struct iwl_scan_offload_profile_match *fw_match;
1776                 struct cfg80211_wowlan_nd_match *match;
1777                 int n_channels = 0;
1778
1779                 fw_match = &query.matches[i];
1780
1781                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1782                         n_channels += hweight8(fw_match->matching_channels[j]);
1783
1784                 match = kzalloc(sizeof(*match) +
1785                                 (n_channels * sizeof(*match->channels)),
1786                                 GFP_KERNEL);
1787                 if (!match)
1788                         goto out_report_nd;
1789
1790                 net_detect->matches[net_detect->n_matches++] = match;
1791
1792                 match->ssid.ssid_len = mvm->nd_match_sets[i].ssid.ssid_len;
1793                 memcpy(match->ssid.ssid, mvm->nd_match_sets[i].ssid.ssid,
1794                        match->ssid.ssid_len);
1795
1796                 if (mvm->n_nd_channels < n_channels)
1797                         continue;
1798
1799                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
1800                         if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
1801                                 match->channels[match->n_channels++] =
1802                                         mvm->nd_channels[j]->center_freq;
1803         }
1804
1805 out_report_nd:
1806         wakeup.net_detect = net_detect;
1807 out:
1808         iwl_mvm_free_nd(mvm);
1809
1810         mutex_unlock(&mvm->mutex);
1811         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1812
1813         if (net_detect) {
1814                 for (i = 0; i < net_detect->n_matches; i++)
1815                         kfree(net_detect->matches[i]);
1816                 kfree(net_detect);
1817         }
1818 }
1819
1820 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1821 {
1822 #ifdef CONFIG_IWLWIFI_DEBUGFS
1823         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1824         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1825         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1826
1827         if (!mvm->store_d3_resume_sram)
1828                 return;
1829
1830         if (!mvm->d3_resume_sram) {
1831                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1832                 if (!mvm->d3_resume_sram)
1833                         return;
1834         }
1835
1836         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1837 #endif
1838 }
1839
1840 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1841                                        struct ieee80211_vif *vif)
1842 {
1843         /* skip the one we keep connection on */
1844         if (data == vif)
1845                 return;
1846
1847         if (vif->type == NL80211_IFTYPE_STATION)
1848                 ieee80211_resume_disconnect(vif);
1849 }
1850
1851 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1852 {
1853         struct ieee80211_vif *vif = NULL;
1854         int ret;
1855         enum iwl_d3_status d3_status;
1856         bool keep = false;
1857
1858         mutex_lock(&mvm->mutex);
1859
1860         /* get the BSS vif pointer again */
1861         vif = iwl_mvm_get_bss_vif(mvm);
1862         if (IS_ERR_OR_NULL(vif))
1863                 goto out_unlock;
1864
1865         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1866         if (ret)
1867                 goto out_unlock;
1868
1869         if (d3_status != IWL_D3_STATUS_ALIVE) {
1870                 IWL_INFO(mvm, "Device was reset during suspend\n");
1871                 goto out_unlock;
1872         }
1873
1874         /* query SRAM first in case we want event logging */
1875         iwl_mvm_read_d3_sram(mvm);
1876
1877         if (mvm->net_detect) {
1878                 iwl_mvm_query_netdetect_reasons(mvm, vif);
1879         } else {
1880                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1881 #ifdef CONFIG_IWLWIFI_DEBUGFS
1882                 if (keep)
1883                         mvm->keep_vif = vif;
1884 #endif
1885         }
1886         /* has unlocked the mutex, so skip that */
1887         goto out;
1888
1889  out_unlock:
1890         mutex_unlock(&mvm->mutex);
1891
1892  out:
1893         if (!test)
1894                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1895                         IEEE80211_IFACE_ITER_NORMAL,
1896                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1897
1898         /* return 1 to reconfigure the device */
1899         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1900         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
1901         return 1;
1902 }
1903
1904 int iwl_mvm_resume(struct ieee80211_hw *hw)
1905 {
1906         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1907
1908         iwl_trans_resume(mvm->trans);
1909
1910         if (mvm->hw->wiphy->wowlan_config->any) {
1911                 /* 'any' trigger means d0i3 usage */
1912                 if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) {
1913                         int ret = iwl_mvm_exit_d0i3(hw->priv);
1914
1915                         if (ret)
1916                                 return ret;
1917                         /*
1918                          * d0i3 exit will be deferred until reconfig_complete.
1919                          * make sure there we are out of d0i3.
1920                          */
1921                 }
1922                 return 0;
1923         }
1924
1925         return __iwl_mvm_resume(mvm, false);
1926 }
1927
1928 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1929 {
1930         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1931
1932         device_set_wakeup_enable(mvm->trans->dev, enabled);
1933 }
1934
1935 #ifdef CONFIG_IWLWIFI_DEBUGFS
1936 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1937 {
1938         struct iwl_mvm *mvm = inode->i_private;
1939         int err;
1940
1941         if (mvm->d3_test_active)
1942                 return -EBUSY;
1943
1944         file->private_data = inode->i_private;
1945
1946         ieee80211_stop_queues(mvm->hw);
1947         synchronize_net();
1948
1949         /* start pseudo D3 */
1950         rtnl_lock();
1951         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1952         rtnl_unlock();
1953         if (err > 0)
1954                 err = -EINVAL;
1955         if (err) {
1956                 ieee80211_wake_queues(mvm->hw);
1957                 return err;
1958         }
1959         mvm->d3_test_active = true;
1960         mvm->keep_vif = NULL;
1961         return 0;
1962 }
1963
1964 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1965                                     size_t count, loff_t *ppos)
1966 {
1967         struct iwl_mvm *mvm = file->private_data;
1968         u32 pme_asserted;
1969
1970         while (true) {
1971                 /* read pme_ptr if available */
1972                 if (mvm->d3_test_pme_ptr) {
1973                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
1974                                                 mvm->d3_test_pme_ptr);
1975                         if (pme_asserted)
1976                                 break;
1977                 }
1978
1979                 if (msleep_interruptible(100))
1980                         break;
1981         }
1982
1983         return 0;
1984 }
1985
1986 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1987                                               struct ieee80211_vif *vif)
1988 {
1989         /* skip the one we keep connection on */
1990         if (_data == vif)
1991                 return;
1992
1993         if (vif->type == NL80211_IFTYPE_STATION)
1994                 ieee80211_connection_loss(vif);
1995 }
1996
1997 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1998 {
1999         struct iwl_mvm *mvm = inode->i_private;
2000         int remaining_time = 10;
2001
2002         mvm->d3_test_active = false;
2003         rtnl_lock();
2004         __iwl_mvm_resume(mvm, true);
2005         rtnl_unlock();
2006         iwl_abort_notification_waits(&mvm->notif_wait);
2007         ieee80211_restart_hw(mvm->hw);
2008
2009         /* wait for restart and disconnect all interfaces */
2010         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2011                remaining_time > 0) {
2012                 remaining_time--;
2013                 msleep(1000);
2014         }
2015
2016         if (remaining_time == 0)
2017                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
2018
2019         ieee80211_iterate_active_interfaces_atomic(
2020                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2021                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2022
2023         ieee80211_wake_queues(mvm->hw);
2024
2025         return 0;
2026 }
2027
2028 const struct file_operations iwl_dbgfs_d3_test_ops = {
2029         .llseek = no_llseek,
2030         .open = iwl_mvm_d3_test_open,
2031         .read = iwl_mvm_d3_test_read,
2032         .release = iwl_mvm_d3_test_release,
2033 };
2034 #endif