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 - 2015 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.
  19  *
  20  * You should have received a copy of the GNU General Public License
  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
  24  *
  25  * The full GNU General Public License is included in this distribution
  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 - 2015 Intel Mobile Communications GmbH
  36  * All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  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.
  48  *  * Neither the name Intel Corporation nor the names of its
  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         if (iwl_mvm_is_lar_supported(mvm) && iwl_mvm_init_fw_regd(mvm))
 698                 IWL_ERR(mvm, "Failed to initialize D3 LAR information\n");
 699
 700         return 0;
 701 }
 702
 703 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 704                                        struct ieee80211_vif *vif)
 705 {
 706         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 707         struct iwl_nonqos_seq_query_cmd query_cmd = {
 708                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 709                 .mac_id_n_color =
 710                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 711                                                         mvmvif->color)),
 712         };
 713         struct iwl_host_cmd cmd = {
 714                 .id = NON_QOS_TX_COUNTER_CMD,
 715                 .flags = CMD_WANT_SKB,
 716         };
 717         int err;
 718         u32 size;
 719
 720         cmd.data[0] = &query_cmd;
 721         cmd.len[0] = sizeof(query_cmd);
 722
 723         err = iwl_mvm_send_cmd(mvm, &cmd);
 724         if (err)
 725                 return err;
 726
 727         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 728         if (size < sizeof(__le16)) {
 729                 err = -EINVAL;
 730         } else {
 731                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 732                 /* firmware returns next, not last-used seqno */
 733                 err = (u16) (err - 0x10);
 734         }
 735
 736         iwl_free_resp(&cmd);
 737         return err;
 738 }
 739
 740 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 741 {
 742         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 743         struct iwl_nonqos_seq_query_cmd query_cmd = {
 744                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 745                 .mac_id_n_color =
 746                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 747                                                         mvmvif->color)),
 748                 .value = cpu_to_le16(mvmvif->seqno),
 749         };
 750
 751         /* return if called during restart, not resume from D3 */
 752         if (!mvmvif->seqno_valid)
 753                 return;
 754
 755         mvmvif->seqno_valid = false;
 756
 757         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 758                                  sizeof(query_cmd), &query_cmd))
 759                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 760 }
 761
 762 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 763 {
 764         iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
 765
 766         iwl_trans_stop_device(mvm->trans);
 767
 768         /*
 769          * Set the HW restart bit -- this is mostly true as we're
 770          * going to load new firmware and reprogram that, though
 771          * the reprogramming is going to be manual to avoid adding
 772          * all the MACs that aren't support.
 773          * We don't have to clear up everything though because the
 774          * reprogramming is manual. When we resume, we'll actually
 775          * go through a proper restart sequence again to switch
 776          * back to the runtime firmware image.
 777          */
 778         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 779
 780         /* We reprogram keys and shouldn't allocate new key indices */
 781         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 782
 783         mvm->ptk_ivlen = 0;
 784         mvm->ptk_icvlen = 0;
 785         mvm->ptk_ivlen = 0;
 786         mvm->ptk_icvlen = 0;
 787
 788         return iwl_mvm_load_d3_fw(mvm);
 789 }
 790
 791 static int
 792 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 793                           struct cfg80211_wowlan *wowlan,
 794                           struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 795                           struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 796                           struct ieee80211_sta *ap_sta)
 797 {
 798         int ret;
 799         struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 800
 801         /* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */
 802
 803         wowlan_config_cmd->is_11n_connection =
 804                                         ap_sta->ht_cap.ht_supported;
 805
 806         /* Query the last used seqno and set it */
 807         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 808         if (ret < 0)
 809                 return ret;
 810
 811         wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret);
 812
 813         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd);
 814
 815         if (wowlan->disconnect)
 816                 wowlan_config_cmd->wakeup_filter |=
 817                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 818                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 819         if (wowlan->magic_pkt)
 820                 wowlan_config_cmd->wakeup_filter |=
 821                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 822         if (wowlan->gtk_rekey_failure)
 823                 wowlan_config_cmd->wakeup_filter |=
 824                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 825         if (wowlan->eap_identity_req)
 826                 wowlan_config_cmd->wakeup_filter |=
 827                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 828         if (wowlan->four_way_handshake)
 829                 wowlan_config_cmd->wakeup_filter |=
 830                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 831         if (wowlan->n_patterns)
 832                 wowlan_config_cmd->wakeup_filter |=
 833                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 834
 835         if (wowlan->rfkill_release)
 836                 wowlan_config_cmd->wakeup_filter |=
 837                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 838
 839         if (wowlan->tcp) {
 840                 /*
 841                  * Set the "link change" (really "link lost") flag as well
 842                  * since that implies losing the TCP connection.
 843                  */
 844                 wowlan_config_cmd->wakeup_filter |=
 845                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 846                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 847                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 848                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 849         }
 850
 851         return 0;
 852 }
 853
 854 static int
 855 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
 856                       struct cfg80211_wowlan *wowlan,
 857                       struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 858                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 859                       struct ieee80211_sta *ap_sta)
 860 {
 861         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 862         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 863         struct wowlan_key_data key_data = {
 864                 .use_rsc_tsc = false,
 865                 .tkip = &tkip_cmd,
 866                 .use_tkip = false,
 867         };
 868         int ret;
 869
 870         ret = iwl_mvm_switch_to_d3(mvm);
 871         if (ret)
 872                 return ret;
 873
 874         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 875         if (ret)
 876                 return ret;
 877
 878         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 879         if (!key_data.rsc_tsc)
 880                 return -ENOMEM;
 881
 882         if (!iwlwifi_mod_params.sw_crypto) {
 883                 /*
 884                  * This needs to be unlocked due to lock ordering
 885                  * constraints. Since we're in the suspend path
 886                  * that isn't really a problem though.
 887                  */
 888                 mutex_unlock(&mvm->mutex);
 889                 ieee80211_iter_keys(mvm->hw, vif,
 890                                     iwl_mvm_wowlan_program_keys,
 891                                     &key_data);
 892                 mutex_lock(&mvm->mutex);
 893                 if (key_data.error) {
 894                         ret = -EIO;
 895                         goto out;
 896                 }
 897
 898                 if (key_data.use_rsc_tsc) {
 899                         struct iwl_host_cmd rsc_tsc_cmd = {
 900                                 .id = WOWLAN_TSC_RSC_PARAM,
 901                                 .data[0] = key_data.rsc_tsc,
 902                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 903                                 .len[0] = sizeof(*key_data.rsc_tsc),
 904                         };
 905
 906                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 907                         if (ret)
 908                                 goto out;
 909                 }
 910
 911                 if (key_data.use_tkip) {
 912                         ret = iwl_mvm_send_cmd_pdu(mvm,
 913                                                    WOWLAN_TKIP_PARAM,
 914                                                    0, sizeof(tkip_cmd),
 915                                                    &tkip_cmd);
 916                         if (ret)
 917                                 goto out;
 918                 }
 919
 920                 if (mvmvif->rekey_data.valid) {
 921                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 922                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 923                                NL80211_KCK_LEN);
 924                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 925                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 926                                NL80211_KEK_LEN);
 927                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 928                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 929
 930                         ret = iwl_mvm_send_cmd_pdu(mvm,
 931                                                    WOWLAN_KEK_KCK_MATERIAL, 0,
 932                                                    sizeof(kek_kck_cmd),
 933                                                    &kek_kck_cmd);
 934                         if (ret)
 935                                 goto out;
 936                 }
 937         }
 938
 939         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 940                                    sizeof(*wowlan_config_cmd),
 941                                    wowlan_config_cmd);
 942         if (ret)
 943                 goto out;
 944
 945         ret = iwl_mvm_send_patterns(mvm, wowlan);
 946         if (ret)
 947                 goto out;
 948
 949         ret = iwl_mvm_send_proto_offload(mvm, vif, false, 0);
 950         if (ret)
 951                 goto out;
 952
 953         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
 954
 955 out:
 956         kfree(key_data.rsc_tsc);
 957         return ret;
 958 }
 959
 960 static int
 961 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
 962                          struct cfg80211_wowlan *wowlan,
 963                          struct cfg80211_sched_scan_request *nd_config,
 964                          struct ieee80211_vif *vif)
 965 {
 966         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 967         int ret;
 968
 969         ret = iwl_mvm_switch_to_d3(mvm);
 970         if (ret)
 971                 return ret;
 972
 973         /* rfkill release can be either for wowlan or netdetect */
 974         if (wowlan->rfkill_release)
 975                 wowlan_config_cmd.wakeup_filter |=
 976                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 977
 978         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 979                                    sizeof(wowlan_config_cmd),
 980                                    &wowlan_config_cmd);
 981         if (ret)
 982                 return ret;
 983
 984         ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
 985                                        IWL_MVM_SCAN_NETDETECT);
 986         if (ret)
 987                 return ret;
 988
 989         if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
 990                 return -EBUSY;
 991
 992         /* save the sched scan matchsets... */
 993         if (nd_config->n_match_sets) {
 994                 mvm->nd_match_sets = kmemdup(nd_config->match_sets,
 995                                              sizeof(*nd_config->match_sets) *
 996                                              nd_config->n_match_sets,
 997                                              GFP_KERNEL);
 998                 if (mvm->nd_match_sets)
 999                         mvm->n_nd_match_sets = nd_config->n_match_sets;
1000         }
1001
1002         /* ...and the sched scan channels for later reporting */
1003         mvm->nd_channels = kmemdup(nd_config->channels,
1004                                    sizeof(*nd_config->channels) *
1005                                    nd_config->n_channels,
1006                                    GFP_KERNEL);
1007         if (mvm->nd_channels)
1008                 mvm->n_nd_channels = nd_config->n_channels;
1009
1010         return 0;
1011 }
1012
1013 static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
1014 {
1015         kfree(mvm->nd_match_sets);
1016         mvm->nd_match_sets = NULL;
1017         mvm->n_nd_match_sets = 0;
1018         kfree(mvm->nd_channels);
1019         mvm->nd_channels = NULL;
1020         mvm->n_nd_channels = 0;
1021 }
1022
1023 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
1024                              struct cfg80211_wowlan *wowlan,
1025                              bool test)
1026 {
1027         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1028         struct ieee80211_vif *vif = NULL;
1029         struct iwl_mvm_vif *mvmvif = NULL;
1030         struct ieee80211_sta *ap_sta = NULL;
1031         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1032                 /*
1033                  * Program the minimum sleep time to 10 seconds, as many
1034                  * platforms have issues processing a wakeup signal while
1035                  * still being in the process of suspending.
1036                  */
1037                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1038         };
1039         struct iwl_host_cmd d3_cfg_cmd = {
1040                 .id = D3_CONFIG_CMD,
1041                 .flags = CMD_WANT_SKB,
1042                 .data[0] = &d3_cfg_cmd_data,
1043                 .len[0] = sizeof(d3_cfg_cmd_data),
1044         };
1045         int ret;
1046         int len __maybe_unused;
1047
1048         if (!wowlan) {
1049                 /*
1050                  * mac80211 shouldn't get here, but for D3 test
1051                  * it doesn't warrant a warning
1052                  */
1053                 WARN_ON(!test);
1054                 return -EINVAL;
1055         }
1056
1057         mutex_lock(&mvm->mutex);
1058
1059         vif = iwl_mvm_get_bss_vif(mvm);
1060         if (IS_ERR_OR_NULL(vif)) {
1061                 ret = 1;
1062                 goto out_noreset;
1063         }
1064
1065         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1066
1067         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) {
1068                 /* if we're not associated, this must be netdetect */
1069                 if (!wowlan->nd_config && !mvm->nd_config) {
1070                         ret = 1;
1071                         goto out_noreset;
1072                 }
1073
1074                 ret = iwl_mvm_netdetect_config(
1075                         mvm, wowlan, wowlan->nd_config ?: mvm->nd_config, vif);
1076                 if (ret)
1077                         goto out;
1078
1079                 mvm->net_detect = true;
1080         } else {
1081                 struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1082
1083                 ap_sta = rcu_dereference_protected(
1084                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1085                         lockdep_is_held(&mvm->mutex));
1086                 if (IS_ERR_OR_NULL(ap_sta)) {
1087                         ret = -EINVAL;
1088                         goto out_noreset;
1089                 }
1090
1091                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1092                                                 vif, mvmvif, ap_sta);
1093                 if (ret)
1094                         goto out_noreset;
1095                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1096                                             vif, mvmvif, ap_sta);
1097                 if (ret)
1098                         goto out;
1099
1100                 mvm->net_detect = false;
1101         }
1102
1103         ret = iwl_mvm_power_update_device(mvm);
1104         if (ret)
1105                 goto out;
1106
1107         ret = iwl_mvm_power_update_mac(mvm);
1108         if (ret)
1109                 goto out;
1110
1111 #ifdef CONFIG_IWLWIFI_DEBUGFS
1112         if (mvm->d3_wake_sysassert)
1113                 d3_cfg_cmd_data.wakeup_flags |=
1114                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1115 #endif
1116
1117         /* must be last -- this switches firmware state */
1118         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1119         if (ret)
1120                 goto out;
1121 #ifdef CONFIG_IWLWIFI_DEBUGFS
1122         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1123         if (len >= sizeof(u32)) {
1124                 mvm->d3_test_pme_ptr =
1125                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1126         }
1127 #endif
1128         iwl_free_resp(&d3_cfg_cmd);
1129
1130         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1131
1132         iwl_trans_d3_suspend(mvm->trans, test);
1133  out:
1134         if (ret < 0) {
1135                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1136                 ieee80211_restart_hw(mvm->hw);
1137                 iwl_mvm_free_nd(mvm);
1138         }
1139  out_noreset:
1140         mutex_unlock(&mvm->mutex);
1141
1142         return ret;
1143 }
1144
1145 static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1146 {
1147         struct iwl_notification_wait wait_d3;
1148         static const u16 d3_notif[] = { D3_CONFIG_CMD };
1149         int ret;
1150
1151         iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1152                                    d3_notif, ARRAY_SIZE(d3_notif),
1153                                    NULL, NULL);
1154
1155         ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1156         if (ret)
1157                 goto remove_notif;
1158
1159         ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1160         WARN_ON_ONCE(ret);
1161         return ret;
1162
1163 remove_notif:
1164         iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1165         return ret;
1166 }
1167
1168 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1169 {
1170         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1171         int ret;
1172
1173         ret = iwl_trans_suspend(mvm->trans);
1174         if (ret)
1175                 return ret;
1176
1177         mvm->trans->wowlan_d0i3 = wowlan->any;
1178         if (mvm->trans->wowlan_d0i3) {
1179                 /* 'any' trigger means d0i3 usage */
1180                 if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) {
1181                         ret = iwl_mvm_enter_d0i3_sync(mvm);
1182
1183                         if (ret)
1184                                 return ret;
1185                 }
1186
1187                 mutex_lock(&mvm->d0i3_suspend_mutex);
1188                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1189                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1190
1191                 iwl_trans_d3_suspend(mvm->trans, false);
1192
1193                 return 0;
1194         }
1195
1196         return __iwl_mvm_suspend(hw, wowlan, false);
1197 }
1198
1199 /* converted data from the different status responses */
1200 struct iwl_wowlan_status_data {
1201         u16 pattern_number;
1202         u16 qos_seq_ctr[8];
1203         u32 wakeup_reasons;
1204         u32 wake_packet_length;
1205         u32 wake_packet_bufsize;
1206         const u8 *wake_packet;
1207 };
1208
1209 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1210                                           struct ieee80211_vif *vif,
1211                                           struct iwl_wowlan_status_data *status)
1212 {
1213         struct sk_buff *pkt = NULL;
1214         struct cfg80211_wowlan_wakeup wakeup = {
1215                 .pattern_idx = -1,
1216         };
1217         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1218         u32 reasons = status->wakeup_reasons;
1219
1220         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1221                 wakeup_report = NULL;
1222                 goto report;
1223         }
1224
1225         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1226                 wakeup.magic_pkt = true;
1227
1228         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1229                 wakeup.pattern_idx =
1230                         status->pattern_number;
1231
1232         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1233                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1234                 wakeup.disconnect = true;
1235
1236         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1237                 wakeup.gtk_rekey_failure = true;
1238
1239         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1240                 wakeup.rfkill_release = true;
1241
1242         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1243                 wakeup.eap_identity_req = true;
1244
1245         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1246                 wakeup.four_way_handshake = true;
1247
1248         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1249                 wakeup.tcp_connlost = true;
1250
1251         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1252                 wakeup.tcp_nomoretokens = true;
1253
1254         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1255                 wakeup.tcp_match = true;
1256
1257         if (status->wake_packet_bufsize) {
1258                 int pktsize = status->wake_packet_bufsize;
1259                 int pktlen = status->wake_packet_length;
1260                 const u8 *pktdata = status->wake_packet;
1261                 struct ieee80211_hdr *hdr = (void *)pktdata;
1262                 int truncated = pktlen - pktsize;
1263
1264                 /* this would be a firmware bug */
1265                 if (WARN_ON_ONCE(truncated < 0))
1266                         truncated = 0;
1267
1268                 if (ieee80211_is_data(hdr->frame_control)) {
1269                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1270                         int ivlen = 0, icvlen = 4; /* also FCS */
1271
1272                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1273                         if (!pkt)
1274                                 goto report;
1275
1276                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1277                         pktdata += hdrlen;
1278                         pktsize -= hdrlen;
1279
1280                         if (ieee80211_has_protected(hdr->frame_control)) {
1281                                 /*
1282                                  * This is unlocked and using gtk_i(c)vlen,
1283                                  * but since everything is under RTNL still
1284                                  * that's not really a problem - changing
1285                                  * it would be difficult.
1286                                  */
1287                                 if (is_multicast_ether_addr(hdr->addr1)) {
1288                                         ivlen = mvm->gtk_ivlen;
1289                                         icvlen += mvm->gtk_icvlen;
1290                                 } else {
1291                                         ivlen = mvm->ptk_ivlen;
1292                                         icvlen += mvm->ptk_icvlen;
1293                                 }
1294                         }
1295
1296                         /* if truncated, FCS/ICV is (partially) gone */
1297                         if (truncated >= icvlen) {
1298                                 icvlen = 0;
1299                                 truncated -= icvlen;
1300                         } else {
1301                                 icvlen -= truncated;
1302                                 truncated = 0;
1303                         }
1304
1305                         pktsize -= ivlen + icvlen;
1306                         pktdata += ivlen;
1307
1308                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1309
1310                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1311                                 goto report;
1312                         wakeup.packet = pkt->data;
1313                         wakeup.packet_present_len = pkt->len;
1314                         wakeup.packet_len = pkt->len - truncated;
1315                         wakeup.packet_80211 = false;
1316                 } else {
1317                         int fcslen = 4;
1318
1319                         if (truncated >= 4) {
1320                                 truncated -= 4;
1321                                 fcslen = 0;
1322                         } else {
1323                                 fcslen -= truncated;
1324                                 truncated = 0;
1325                         }
1326                         pktsize -= fcslen;
1327                         wakeup.packet = status->wake_packet;
1328                         wakeup.packet_present_len = pktsize;
1329                         wakeup.packet_len = pktlen - truncated;
1330                         wakeup.packet_80211 = true;
1331                 }
1332         }
1333
1334  report:
1335         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1336         kfree_skb(pkt);
1337 }
1338
1339 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1340                                   struct ieee80211_key_seq *seq)
1341 {
1342         u64 pn;
1343
1344         pn = le64_to_cpu(sc->pn);
1345         seq->ccmp.pn[0] = pn >> 40;
1346         seq->ccmp.pn[1] = pn >> 32;
1347         seq->ccmp.pn[2] = pn >> 24;
1348         seq->ccmp.pn[3] = pn >> 16;
1349         seq->ccmp.pn[4] = pn >> 8;
1350         seq->ccmp.pn[5] = pn;
1351 }
1352
1353 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1354                                    struct ieee80211_key_seq *seq)
1355 {
1356         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1357         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1358 }
1359
1360 static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs,
1361                                    struct ieee80211_key_conf *key)
1362 {
1363         int tid;
1364
1365         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1366
1367         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1368                 struct ieee80211_key_seq seq = {};
1369
1370                 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1371                 ieee80211_set_key_rx_seq(key, tid, &seq);
1372         }
1373 }
1374
1375 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1376                                     struct ieee80211_key_conf *key)
1377 {
1378         int tid;
1379
1380         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1381
1382         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1383                 struct ieee80211_key_seq seq = {};
1384
1385                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1386                 ieee80211_set_key_rx_seq(key, tid, &seq);
1387         }
1388 }
1389
1390 static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key,
1391                                    struct iwl_wowlan_status *status)
1392 {
1393         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1394
1395         switch (key->cipher) {
1396         case WLAN_CIPHER_SUITE_CCMP:
1397                 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key);
1398                 break;
1399         case WLAN_CIPHER_SUITE_TKIP:
1400                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1401                 break;
1402         default:
1403                 WARN_ON(1);
1404         }
1405 }
1406
1407 struct iwl_mvm_d3_gtk_iter_data {
1408         struct iwl_wowlan_status *status;
1409         void *last_gtk;
1410         u32 cipher;
1411         bool find_phase, unhandled_cipher;
1412         int num_keys;
1413 };
1414
1415 static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw,
1416                                    struct ieee80211_vif *vif,
1417                                    struct ieee80211_sta *sta,
1418                                    struct ieee80211_key_conf *key,
1419                                    void *_data)
1420 {
1421         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1422
1423         if (data->unhandled_cipher)
1424                 return;
1425
1426         switch (key->cipher) {
1427         case WLAN_CIPHER_SUITE_WEP40:
1428         case WLAN_CIPHER_SUITE_WEP104:
1429                 /* ignore WEP completely, nothing to do */
1430                 return;
1431         case WLAN_CIPHER_SUITE_CCMP:
1432         case WLAN_CIPHER_SUITE_TKIP:
1433                 /* we support these */
1434                 break;
1435         default:
1436                 /* everything else (even CMAC for MFP) - disconnect from AP */
1437                 data->unhandled_cipher = true;
1438                 return;
1439         }
1440
1441         data->num_keys++;
1442
1443         /*
1444          * pairwise key - update sequence counters only;
1445          * note that this assumes no TDLS sessions are active
1446          */
1447         if (sta) {
1448                 struct ieee80211_key_seq seq = {};
1449                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1450
1451                 if (data->find_phase)
1452                         return;
1453
1454                 switch (key->cipher) {
1455                 case WLAN_CIPHER_SUITE_CCMP:
1456                         iwl_mvm_aes_sc_to_seq(&sc->aes.tsc, &seq);
1457                         iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key);
1458                         break;
1459                 case WLAN_CIPHER_SUITE_TKIP:
1460                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1461                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1462                         break;
1463                 }
1464                 ieee80211_set_key_tx_seq(key, &seq);
1465
1466                 /* that's it for this key */
1467                 return;
1468         }
1469
1470         if (data->find_phase) {
1471                 data->last_gtk = key;
1472                 data->cipher = key->cipher;
1473                 return;
1474         }
1475
1476         if (data->status->num_of_gtk_rekeys)
1477                 ieee80211_remove_key(key);
1478         else if (data->last_gtk == key)
1479                 iwl_mvm_set_key_rx_seq(key, data->status);
1480 }
1481
1482 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1483                                           struct ieee80211_vif *vif,
1484                                           struct iwl_wowlan_status *status)
1485 {
1486         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1487         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1488                 .status = status,
1489         };
1490         u32 disconnection_reasons =
1491                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1492                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1493
1494         if (!status || !vif->bss_conf.bssid)
1495                 return false;
1496
1497         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1498                 return false;
1499
1500         /* find last GTK that we used initially, if any */
1501         gtkdata.find_phase = true;
1502         ieee80211_iter_keys(mvm->hw, vif,
1503                             iwl_mvm_d3_update_gtks, &gtkdata);
1504         /* not trying to keep connections with MFP/unhandled ciphers */
1505         if (gtkdata.unhandled_cipher)
1506                 return false;
1507         if (!gtkdata.num_keys)
1508                 goto out;
1509         if (!gtkdata.last_gtk)
1510                 return false;
1511
1512         /*
1513          * invalidate all other GTKs that might still exist and update
1514          * the one that we used
1515          */
1516         gtkdata.find_phase = false;
1517         ieee80211_iter_keys(mvm->hw, vif,
1518                             iwl_mvm_d3_update_gtks, &gtkdata);
1519
1520         if (status->num_of_gtk_rekeys) {
1521                 struct ieee80211_key_conf *key;
1522                 struct {
1523                         struct ieee80211_key_conf conf;
1524                         u8 key[32];
1525                 } conf = {
1526                         .conf.cipher = gtkdata.cipher,
1527                         .conf.keyidx = status->gtk.key_index,
1528                 };
1529
1530                 switch (gtkdata.cipher) {
1531                 case WLAN_CIPHER_SUITE_CCMP:
1532                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1533                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1534                                WLAN_KEY_LEN_CCMP);
1535                         break;
1536                 case WLAN_CIPHER_SUITE_TKIP:
1537                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1538                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1539                         /* leave TX MIC key zeroed, we don't use it anyway */
1540                         memcpy(conf.conf.key +
1541                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1542                                status->gtk.tkip_mic_key, 8);
1543                         break;
1544                 }
1545
1546                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1547                 if (IS_ERR(key))
1548                         return false;
1549                 iwl_mvm_set_key_rx_seq(key, status);
1550         }
1551
1552         if (status->num_of_gtk_rekeys) {
1553                 __be64 replay_ctr =
1554                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1555                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1556                                            (void *)&replay_ctr, GFP_KERNEL);
1557         }
1558
1559 out:
1560         mvmvif->seqno_valid = true;
1561         /* +0x10 because the set API expects next-to-use, not last-used */
1562         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1563
1564         return true;
1565 }
1566
1567 static struct iwl_wowlan_status *
1568 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1569 {
1570         u32 base = mvm->error_event_table;
1571         struct error_table_start {
1572                 /* cf. struct iwl_error_event_table */
1573                 u32 valid;
1574                 u32 error_id;
1575         } err_info;
1576         struct iwl_host_cmd cmd = {
1577                 .id = WOWLAN_GET_STATUSES,
1578                 .flags = CMD_WANT_SKB,
1579         };
1580         struct iwl_wowlan_status *status, *fw_status;
1581         int ret, len, status_size;
1582
1583         iwl_trans_read_mem_bytes(mvm->trans, base,
1584                                  &err_info, sizeof(err_info));
1585
1586         if (err_info.valid) {
1587                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1588                          err_info.valid, err_info.error_id);
1589                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1590                         struct cfg80211_wowlan_wakeup wakeup = {
1591                                 .rfkill_release = true,
1592                         };
1593                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1594                                                        GFP_KERNEL);
1595                 }
1596                 return ERR_PTR(-EIO);
1597         }
1598
1599         /* only for tracing for now */
1600         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1601         if (ret)
1602                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1603
1604         ret = iwl_mvm_send_cmd(mvm, &cmd);
1605         if (ret) {
1606                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1607                 return ERR_PTR(ret);
1608         }
1609
1610         /* RF-kill already asserted again... */
1611         if (!cmd.resp_pkt) {
1612                 fw_status = ERR_PTR(-ERFKILL);
1613                 goto out_free_resp;
1614         }
1615
1616         status_size = sizeof(*fw_status);
1617
1618         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1619         if (len < status_size) {
1620                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1621                 fw_status = ERR_PTR(-EIO);
1622                 goto out_free_resp;
1623         }
1624
1625         status = (void *)cmd.resp_pkt->data;
1626         if (len != (status_size +
1627                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1628                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1629                 fw_status = ERR_PTR(-EIO);
1630                 goto out_free_resp;
1631         }
1632
1633         fw_status = kmemdup(status, len, GFP_KERNEL);
1634
1635 out_free_resp:
1636         iwl_free_resp(&cmd);
1637         return fw_status;
1638 }
1639
1640 /* releases the MVM mutex */
1641 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1642                                          struct ieee80211_vif *vif)
1643 {
1644         struct iwl_wowlan_status_data status;
1645         struct iwl_wowlan_status *fw_status;
1646         int i;
1647         bool keep;
1648         struct ieee80211_sta *ap_sta;
1649         struct iwl_mvm_sta *mvm_ap_sta;
1650
1651         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1652         if (IS_ERR_OR_NULL(fw_status))
1653                 goto out_unlock;
1654
1655         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1656         for (i = 0; i < 8; i++)
1657                 status.qos_seq_ctr[i] =
1658                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1659         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1660         status.wake_packet_length =
1661                 le32_to_cpu(fw_status->wake_packet_length);
1662         status.wake_packet_bufsize =
1663                 le32_to_cpu(fw_status->wake_packet_bufsize);
1664         status.wake_packet = fw_status->wake_packet;
1665
1666         /* still at hard-coded place 0 for D3 image */
1667         ap_sta = rcu_dereference_protected(
1668                         mvm->fw_id_to_mac_id[0],
1669                         lockdep_is_held(&mvm->mutex));
1670         if (IS_ERR_OR_NULL(ap_sta))
1671                 goto out_free;
1672
1673         mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
1674         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1675                 u16 seq = status.qos_seq_ctr[i];
1676                 /* firmware stores last-used value, we store next value */
1677                 seq += 0x10;
1678                 mvm_ap_sta->tid_data[i].seq_number = seq;
1679         }
1680
1681         /* now we have all the data we need, unlock to avoid mac80211 issues */
1682         mutex_unlock(&mvm->mutex);
1683
1684         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1685
1686         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1687
1688         kfree(fw_status);
1689         return keep;
1690
1691 out_free:
1692         kfree(fw_status);
1693 out_unlock:
1694         mutex_unlock(&mvm->mutex);
1695         return false;
1696 }
1697
1698 struct iwl_mvm_nd_query_results {
1699         u32 matched_profiles;
1700         struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1701 };
1702
1703 static int
1704 iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1705                                 struct iwl_mvm_nd_query_results *results)
1706 {
1707         struct iwl_scan_offload_profiles_query *query;
1708         struct iwl_host_cmd cmd = {
1709                 .id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1710                 .flags = CMD_WANT_SKB,
1711         };
1712         int ret, len;
1713
1714         ret = iwl_mvm_send_cmd(mvm, &cmd);
1715         if (ret) {
1716                 IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1717                 return ret;
1718         }
1719
1720         /* RF-kill already asserted again... */
1721         if (!cmd.resp_pkt) {
1722                 ret = -ERFKILL;
1723                 goto out_free_resp;
1724         }
1725
1726         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1727         if (len < sizeof(*query)) {
1728                 IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1729                 ret = -EIO;
1730                 goto out_free_resp;
1731         }
1732
1733         query = (void *)cmd.resp_pkt->data;
1734
1735         results->matched_profiles = le32_to_cpu(query->matched_profiles);
1736         memcpy(results->matches, query->matches, sizeof(results->matches));
1737
1738 #ifdef CONFIG_IWLWIFI_DEBUGFS
1739         mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1740 #endif
1741
1742 out_free_resp:
1743         iwl_free_resp(&cmd);
1744         return ret;
1745 }
1746
1747 static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1748                                             struct ieee80211_vif *vif)
1749 {
1750         struct cfg80211_wowlan_nd_info *net_detect = NULL;
1751         struct cfg80211_wowlan_wakeup wakeup = {
1752                 .pattern_idx = -1,
1753         };
1754         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1755         struct iwl_mvm_nd_query_results query;
1756         struct iwl_wowlan_status *fw_status;
1757         unsigned long matched_profiles;
1758         u32 reasons = 0;
1759         int i, j, n_matches, ret;
1760
1761         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1762         if (!IS_ERR_OR_NULL(fw_status)) {
1763                 reasons = le32_to_cpu(fw_status->wakeup_reasons);
1764                 kfree(fw_status);
1765         }
1766
1767         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1768                 wakeup.rfkill_release = true;
1769
1770         if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1771                 goto out;
1772
1773         ret = iwl_mvm_netdetect_query_results(mvm, &query);
1774         if (ret || !query.matched_profiles) {
1775                 wakeup_report = NULL;
1776                 goto out;
1777         }
1778
1779         matched_profiles = query.matched_profiles;
1780         if (mvm->n_nd_match_sets) {
1781                 n_matches = hweight_long(matched_profiles);
1782         } else {
1783                 IWL_ERR(mvm, "no net detect match information available\n");
1784                 n_matches = 0;
1785         }
1786
1787         net_detect = kzalloc(sizeof(*net_detect) +
1788                              (n_matches * sizeof(net_detect->matches[0])),
1789                              GFP_KERNEL);
1790         if (!net_detect || !n_matches)
1791                 goto out_report_nd;
1792
1793         for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1794                 struct iwl_scan_offload_profile_match *fw_match;
1795                 struct cfg80211_wowlan_nd_match *match;
1796                 int idx, n_channels = 0;
1797
1798                 fw_match = &query.matches[i];
1799
1800                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1801                         n_channels += hweight8(fw_match->matching_channels[j]);
1802
1803                 match = kzalloc(sizeof(*match) +
1804                                 (n_channels * sizeof(*match->channels)),
1805                                 GFP_KERNEL);
1806                 if (!match)
1807                         goto out_report_nd;
1808
1809                 net_detect->matches[net_detect->n_matches++] = match;
1810
1811                 /* We inverted the order of the SSIDs in the scan
1812                  * request, so invert the index here.
1813                  */
1814                 idx = mvm->n_nd_match_sets - i - 1;
1815                 match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
1816                 memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
1817                        match->ssid.ssid_len);
1818
1819                 if (mvm->n_nd_channels < n_channels)
1820                         continue;
1821
1822                 for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
1823                         if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
1824                                 match->channels[match->n_channels++] =
1825                                         mvm->nd_channels[j]->center_freq;
1826         }
1827
1828 out_report_nd:
1829         wakeup.net_detect = net_detect;
1830 out:
1831         iwl_mvm_free_nd(mvm);
1832
1833         mutex_unlock(&mvm->mutex);
1834         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1835
1836         if (net_detect) {
1837                 for (i = 0; i < net_detect->n_matches; i++)
1838                         kfree(net_detect->matches[i]);
1839                 kfree(net_detect);
1840         }
1841 }
1842
1843 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1844 {
1845 #ifdef CONFIG_IWLWIFI_DEBUGFS
1846         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1847         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1848         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1849
1850         if (!mvm->store_d3_resume_sram)
1851                 return;
1852
1853         if (!mvm->d3_resume_sram) {
1854                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1855                 if (!mvm->d3_resume_sram)
1856                         return;
1857         }
1858
1859         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1860 #endif
1861 }
1862
1863 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1864                                        struct ieee80211_vif *vif)
1865 {
1866         /* skip the one we keep connection on */
1867         if (data == vif)
1868                 return;
1869
1870         if (vif->type == NL80211_IFTYPE_STATION)
1871                 ieee80211_resume_disconnect(vif);
1872 }
1873
1874 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1875 {
1876         struct ieee80211_vif *vif = NULL;
1877         int ret;
1878         enum iwl_d3_status d3_status;
1879         bool keep = false;
1880
1881         mutex_lock(&mvm->mutex);
1882
1883         /* get the BSS vif pointer again */
1884         vif = iwl_mvm_get_bss_vif(mvm);
1885         if (IS_ERR_OR_NULL(vif))
1886                 goto err;
1887
1888         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1889         if (ret)
1890                 goto err;
1891
1892         if (d3_status != IWL_D3_STATUS_ALIVE) {
1893                 IWL_INFO(mvm, "Device was reset during suspend\n");
1894                 goto err;
1895         }
1896
1897         /* query SRAM first in case we want event logging */
1898         iwl_mvm_read_d3_sram(mvm);
1899
1900         /*
1901          * Query the current location and source from the D3 firmware so we
1902          * can play it back when we re-intiailize the D0 firmware
1903          */
1904         iwl_mvm_update_changed_regdom(mvm);
1905
1906         if (mvm->net_detect) {
1907                 iwl_mvm_query_netdetect_reasons(mvm, vif);
1908                 /* has unlocked the mutex, so skip that */
1909                 goto out;
1910         } else {
1911                 keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1912 #ifdef CONFIG_IWLWIFI_DEBUGFS
1913                 if (keep)
1914                         mvm->keep_vif = vif;
1915 #endif
1916                 /* has unlocked the mutex, so skip that */
1917                 goto out_iterate;
1918         }
1919
1920 err:
1921         iwl_mvm_free_nd(mvm);
1922         mutex_unlock(&mvm->mutex);
1923
1924 out_iterate:
1925         if (!test)
1926                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1927                         IEEE80211_IFACE_ITER_NORMAL,
1928                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1929
1930 out:
1931         /* return 1 to reconfigure the device */
1932         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1933         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
1934
1935         /* We always return 1, which causes mac80211 to do a reconfig
1936          * with IEEE80211_RECONFIG_TYPE_RESTART.  This type of
1937          * reconfig calls iwl_mvm_restart_complete(), where we unref
1938          * the IWL_MVM_REF_UCODE_DOWN, so we need to take the
1939          * reference here.
1940          */
1941         iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1942         return 1;
1943 }
1944
1945 static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
1946 {
1947         iwl_trans_resume(mvm->trans);
1948
1949         return __iwl_mvm_resume(mvm, false);
1950 }
1951
1952 static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
1953 {
1954         bool exit_now;
1955         enum iwl_d3_status d3_status;
1956
1957         iwl_trans_d3_resume(mvm->trans, &d3_status, false);
1958
1959         /*
1960          * make sure to clear D0I3_DEFER_WAKEUP before
1961          * calling iwl_trans_resume(), which might wait
1962          * for d0i3 exit completion.
1963          */
1964         mutex_lock(&mvm->d0i3_suspend_mutex);
1965         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1966         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1967                                         &mvm->d0i3_suspend_flags);
1968         mutex_unlock(&mvm->d0i3_suspend_mutex);
1969         if (exit_now) {
1970                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1971                 _iwl_mvm_exit_d0i3(mvm);
1972         }
1973
1974         iwl_trans_resume(mvm->trans);
1975
1976         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND) {
1977                 int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
1978
1979                 if (ret)
1980                         return ret;
1981                 /*
1982                  * d0i3 exit will be deferred until reconfig_complete.
1983                  * make sure there we are out of d0i3.
1984                  */
1985         }
1986         return 0;
1987 }
1988
1989 int iwl_mvm_resume(struct ieee80211_hw *hw)
1990 {
1991         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1992
1993         /* 'any' trigger means d0i3 was used */
1994         if (hw->wiphy->wowlan_config->any)
1995                 return iwl_mvm_resume_d0i3(mvm);
1996         else
1997                 return iwl_mvm_resume_d3(mvm);
1998 }
1999
2000 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2001 {
2002         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2003
2004         device_set_wakeup_enable(mvm->trans->dev, enabled);
2005 }
2006
2007 #ifdef CONFIG_IWLWIFI_DEBUGFS
2008 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2009 {
2010         struct iwl_mvm *mvm = inode->i_private;
2011         int err;
2012
2013         if (mvm->d3_test_active)
2014                 return -EBUSY;
2015
2016         file->private_data = inode->i_private;
2017
2018         ieee80211_stop_queues(mvm->hw);
2019         synchronize_net();
2020
2021         /* start pseudo D3 */
2022         rtnl_lock();
2023         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2024         rtnl_unlock();
2025         if (err > 0)
2026                 err = -EINVAL;
2027         if (err) {
2028                 ieee80211_wake_queues(mvm->hw);
2029                 return err;
2030         }
2031         mvm->d3_test_active = true;
2032         mvm->keep_vif = NULL;
2033         return 0;
2034 }
2035
2036 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2037                                     size_t count, loff_t *ppos)
2038 {
2039         struct iwl_mvm *mvm = file->private_data;
2040         u32 pme_asserted;
2041
2042         while (true) {
2043                 /* read pme_ptr if available */
2044                 if (mvm->d3_test_pme_ptr) {
2045                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
2046                                                 mvm->d3_test_pme_ptr);
2047                         if (pme_asserted)
2048                                 break;
2049                 }
2050
2051                 if (msleep_interruptible(100))
2052                         break;
2053         }
2054
2055         return 0;
2056 }
2057
2058 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2059                                               struct ieee80211_vif *vif)
2060 {
2061         /* skip the one we keep connection on */
2062         if (_data == vif)
2063                 return;
2064
2065         if (vif->type == NL80211_IFTYPE_STATION)
2066                 ieee80211_connection_loss(vif);
2067 }
2068
2069 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2070 {
2071         struct iwl_mvm *mvm = inode->i_private;
2072         int remaining_time = 10;
2073
2074         mvm->d3_test_active = false;
2075         rtnl_lock();
2076         __iwl_mvm_resume(mvm, true);
2077         rtnl_unlock();
2078         iwl_abort_notification_waits(&mvm->notif_wait);
2079         ieee80211_restart_hw(mvm->hw);
2080
2081         /* wait for restart and disconnect all interfaces */
2082         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2083                remaining_time > 0) {
2084                 remaining_time--;
2085                 msleep(1000);
2086         }
2087
2088         if (remaining_time == 0)
2089                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
2090
2091         ieee80211_iterate_active_interfaces_atomic(
2092                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2093                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2094
2095         ieee80211_wake_queues(mvm->hw);
2096
2097         return 0;
2098 }
2099
2100 const struct file_operations iwl_dbgfs_d3_test_ops = {
2101         .llseek = no_llseek,
2102         .open = iwl_mvm_d3_test_open,
2103         .read = iwl_mvm_d3_test_read,
2104         .release = iwl_mvm_d3_test_release,
2105 };
2106 #endif