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.
  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 - 2014 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         return 0;
 698 }
 699
 700 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 701                                        struct ieee80211_vif *vif)
 702 {
 703         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 704         struct iwl_nonqos_seq_query_cmd query_cmd = {
 705                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 706                 .mac_id_n_color =
 707                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 708                                                         mvmvif->color)),
 709         };
 710         struct iwl_host_cmd cmd = {
 711                 .id = NON_QOS_TX_COUNTER_CMD,
 712                 .flags = CMD_WANT_SKB,
 713         };
 714         int err;
 715         u32 size;
 716
 717         cmd.data[0] = &query_cmd;
 718         cmd.len[0] = sizeof(query_cmd);
 719
 720         err = iwl_mvm_send_cmd(mvm, &cmd);
 721         if (err)
 722                 return err;
 723
 724         size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 725         if (size < sizeof(__le16)) {
 726                 err = -EINVAL;
 727         } else {
 728                 err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 729                 /* firmware returns next, not last-used seqno */
 730                 err = (u16) (err - 0x10);
 731         }
 732
 733         iwl_free_resp(&cmd);
 734         return err;
 735 }
 736
 737 void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 738 {
 739         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 740         struct iwl_nonqos_seq_query_cmd query_cmd = {
 741                 .get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 742                 .mac_id_n_color =
 743                         cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 744                                                         mvmvif->color)),
 745                 .value = cpu_to_le16(mvmvif->seqno),
 746         };
 747
 748         /* return if called during restart, not resume from D3 */
 749         if (!mvmvif->seqno_valid)
 750                 return;
 751
 752         mvmvif->seqno_valid = false;
 753
 754         if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 755                                  sizeof(query_cmd), &query_cmd))
 756                 IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 757 }
 758
 759 static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 760 {
 761         iwl_mvm_cancel_scan(mvm);
 762
 763         iwl_trans_stop_device(mvm->trans);
 764
 765         /*
 766          * Set the HW restart bit -- this is mostly true as we're
 767          * going to load new firmware and reprogram that, though
 768          * the reprogramming is going to be manual to avoid adding
 769          * all the MACs that aren't support.
 770          * We don't have to clear up everything though because the
 771          * reprogramming is manual. When we resume, we'll actually
 772          * go through a proper restart sequence again to switch
 773          * back to the runtime firmware image.
 774          */
 775         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 776
 777         /* We reprogram keys and shouldn't allocate new key indices */
 778         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 779
 780         mvm->ptk_ivlen = 0;
 781         mvm->ptk_icvlen = 0;
 782         mvm->ptk_ivlen = 0;
 783         mvm->ptk_icvlen = 0;
 784
 785         return iwl_mvm_load_d3_fw(mvm);
 786 }
 787
 788 static int
 789 iwl_mvm_send_wowlan_config_cmd(struct iwl_mvm *mvm,
 790                                const struct iwl_wowlan_config_cmd_v3 *cmd)
 791 {
 792         /* start only with the v2 part of the command */
 793         u16 cmd_len = sizeof(cmd->common);
 794
 795         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_WOWLAN_CONFIG_TID)
 796                 cmd_len = sizeof(*cmd);
 797
 798         return iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 799                                     cmd_len, cmd);
 800 }
 801
 802 static int
 803 iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 804                           struct cfg80211_wowlan *wowlan,
 805                           struct iwl_wowlan_config_cmd_v3 *wowlan_config_cmd,
 806                           struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 807                           struct ieee80211_sta *ap_sta)
 808 {
 809         int ret;
 810         struct iwl_mvm_sta *mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 811
 812         /* TODO: wowlan_config_cmd->common.wowlan_ba_teardown_tids */
 813
 814         wowlan_config_cmd->common.is_11n_connection =
 815                                         ap_sta->ht_cap.ht_supported;
 816
 817         /* Query the last used seqno and set it */
 818         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 819         if (ret < 0)
 820                 return ret;
 821
 822         wowlan_config_cmd->common.non_qos_seq = cpu_to_le16(ret);
 823
 824         iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, &wowlan_config_cmd->common);
 825
 826         if (wowlan->disconnect)
 827                 wowlan_config_cmd->common.wakeup_filter |=
 828                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 829                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 830         if (wowlan->magic_pkt)
 831                 wowlan_config_cmd->common.wakeup_filter |=
 832                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 833         if (wowlan->gtk_rekey_failure)
 834                 wowlan_config_cmd->common.wakeup_filter |=
 835                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 836         if (wowlan->eap_identity_req)
 837                 wowlan_config_cmd->common.wakeup_filter |=
 838                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 839         if (wowlan->four_way_handshake)
 840                 wowlan_config_cmd->common.wakeup_filter |=
 841                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 842         if (wowlan->n_patterns)
 843                 wowlan_config_cmd->common.wakeup_filter |=
 844                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 845
 846         if (wowlan->rfkill_release)
 847                 wowlan_config_cmd->common.wakeup_filter |=
 848                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 849
 850         if (wowlan->tcp) {
 851                 /*
 852                  * Set the "link change" (really "link lost") flag as well
 853                  * since that implies losing the TCP connection.
 854                  */
 855                 wowlan_config_cmd->common.wakeup_filter |=
 856                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 857                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 858                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 859                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 860         }
 861
 862         return 0;
 863 }
 864
 865 static int
 866 iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
 867                       struct cfg80211_wowlan *wowlan,
 868                       struct iwl_wowlan_config_cmd_v3 *wowlan_config_cmd,
 869                       struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 870                       struct ieee80211_sta *ap_sta)
 871 {
 872         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 873         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 874         struct wowlan_key_data key_data = {
 875                 .use_rsc_tsc = false,
 876                 .tkip = &tkip_cmd,
 877                 .use_tkip = false,
 878         };
 879         int ret;
 880
 881         ret = iwl_mvm_switch_to_d3(mvm);
 882         if (ret)
 883                 return ret;
 884
 885         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 886         if (ret)
 887                 return ret;
 888
 889         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 890         if (!key_data.rsc_tsc)
 891                 return -ENOMEM;
 892
 893         if (!iwlwifi_mod_params.sw_crypto) {
 894                 /*
 895                  * This needs to be unlocked due to lock ordering
 896                  * constraints. Since we're in the suspend path
 897                  * that isn't really a problem though.
 898                  */
 899                 mutex_unlock(&mvm->mutex);
 900                 ieee80211_iter_keys(mvm->hw, vif,
 901                                     iwl_mvm_wowlan_program_keys,
 902                                     &key_data);
 903                 mutex_lock(&mvm->mutex);
 904                 if (key_data.error) {
 905                         ret = -EIO;
 906                         goto out;
 907                 }
 908
 909                 if (key_data.use_rsc_tsc) {
 910                         struct iwl_host_cmd rsc_tsc_cmd = {
 911                                 .id = WOWLAN_TSC_RSC_PARAM,
 912                                 .data[0] = key_data.rsc_tsc,
 913                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 914                                 .len[0] = sizeof(*key_data.rsc_tsc),
 915                         };
 916
 917                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 918                         if (ret)
 919                                 goto out;
 920                 }
 921
 922                 if (key_data.use_tkip) {
 923                         ret = iwl_mvm_send_cmd_pdu(mvm,
 924                                                    WOWLAN_TKIP_PARAM,
 925                                                    0, sizeof(tkip_cmd),
 926                                                    &tkip_cmd);
 927                         if (ret)
 928                                 goto out;
 929                 }
 930
 931                 if (mvmvif->rekey_data.valid) {
 932                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 933                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 934                                NL80211_KCK_LEN);
 935                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 936                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 937                                NL80211_KEK_LEN);
 938                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 939                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 940
 941                         ret = iwl_mvm_send_cmd_pdu(mvm,
 942                                                    WOWLAN_KEK_KCK_MATERIAL, 0,
 943                                                    sizeof(kek_kck_cmd),
 944                                                    &kek_kck_cmd);
 945                         if (ret)
 946                                 goto out;
 947                 }
 948         }
 949
 950         ret = iwl_mvm_send_wowlan_config_cmd(mvm, wowlan_config_cmd);
 951         if (ret)
 952                 goto out;
 953
 954         ret = iwl_mvm_send_patterns(mvm, wowlan);
 955         if (ret)
 956                 goto out;
 957
 958         ret = iwl_mvm_send_proto_offload(mvm, vif, false, 0);
 959         if (ret)
 960                 goto out;
 961
 962         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
 963
 964 out:
 965         kfree(key_data.rsc_tsc);
 966         return ret;
 967 }
 968
 969 static int
 970 iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
 971                          struct cfg80211_wowlan *wowlan,
 972                          struct cfg80211_sched_scan_request *nd_config,
 973                          struct ieee80211_vif *vif)
 974 {
 975         struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {};
 976         int ret;
 977
 978         ret = iwl_mvm_switch_to_d3(mvm);
 979         if (ret)
 980                 return ret;
 981
 982         /* rfkill release can be either for wowlan or netdetect */
 983         if (wowlan->rfkill_release)
 984                 wowlan_config_cmd.common.wakeup_filter |=
 985                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 986
 987         ret = iwl_mvm_send_wowlan_config_cmd(mvm, &wowlan_config_cmd);
 988         if (ret)
 989                 return ret;
 990
 991         ret = iwl_mvm_scan_offload_start(mvm, vif, nd_config, &mvm->nd_ies);
 992
 993         return ret;
 994 }
 995
 996 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 997                              struct cfg80211_wowlan *wowlan,
 998                              bool test)
 999 {
1000         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1001         struct ieee80211_vif *vif = NULL;
1002         struct iwl_mvm_vif *mvmvif = NULL;
1003         struct ieee80211_sta *ap_sta = NULL;
1004         struct iwl_d3_manager_config d3_cfg_cmd_data = {
1005                 /*
1006                  * Program the minimum sleep time to 10 seconds, as many
1007                  * platforms have issues processing a wakeup signal while
1008                  * still being in the process of suspending.
1009                  */
1010                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
1011         };
1012         struct iwl_host_cmd d3_cfg_cmd = {
1013                 .id = D3_CONFIG_CMD,
1014                 .flags = CMD_WANT_SKB,
1015                 .data[0] = &d3_cfg_cmd_data,
1016                 .len[0] = sizeof(d3_cfg_cmd_data),
1017         };
1018         int ret;
1019         int len __maybe_unused;
1020
1021         if (!wowlan) {
1022                 /*
1023                  * mac80211 shouldn't get here, but for D3 test
1024                  * it doesn't warrant a warning
1025                  */
1026                 WARN_ON(!test);
1027                 return -EINVAL;
1028         }
1029
1030         mutex_lock(&mvm->mutex);
1031
1032         vif = iwl_mvm_get_bss_vif(mvm);
1033         if (IS_ERR_OR_NULL(vif)) {
1034                 ret = 1;
1035                 goto out_noreset;
1036         }
1037
1038         mvmvif = iwl_mvm_vif_from_mac80211(vif);
1039
1040         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT) {
1041                 /* if we're not associated, this must be netdetect */
1042                 if (!wowlan->nd_config && !mvm->nd_config) {
1043                         ret = 1;
1044                         goto out_noreset;
1045                 }
1046
1047                 ret = iwl_mvm_netdetect_config(
1048                         mvm, wowlan, wowlan->nd_config ?: mvm->nd_config, vif);
1049                 if (ret)
1050                         goto out;
1051         } else {
1052                 struct iwl_wowlan_config_cmd_v3 wowlan_config_cmd = {};
1053
1054                 ap_sta = rcu_dereference_protected(
1055                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1056                         lockdep_is_held(&mvm->mutex));
1057                 if (IS_ERR_OR_NULL(ap_sta)) {
1058                         ret = -EINVAL;
1059                         goto out_noreset;
1060                 }
1061
1062                 ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1063                                                 vif, mvmvif, ap_sta);
1064                 if (ret)
1065                         goto out_noreset;
1066                 ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1067                                             vif, mvmvif, ap_sta);
1068                 if (ret)
1069                         goto out;
1070         }
1071
1072         ret = iwl_mvm_power_update_device(mvm);
1073         if (ret)
1074                 goto out;
1075
1076         ret = iwl_mvm_power_update_mac(mvm);
1077         if (ret)
1078                 goto out;
1079
1080 #ifdef CONFIG_IWLWIFI_DEBUGFS
1081         if (mvm->d3_wake_sysassert)
1082                 d3_cfg_cmd_data.wakeup_flags |=
1083                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1084 #endif
1085
1086         /* must be last -- this switches firmware state */
1087         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1088         if (ret)
1089                 goto out;
1090 #ifdef CONFIG_IWLWIFI_DEBUGFS
1091         len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1092         if (len >= sizeof(u32)) {
1093                 mvm->d3_test_pme_ptr =
1094                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1095         }
1096 #endif
1097         iwl_free_resp(&d3_cfg_cmd);
1098
1099         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1100
1101         iwl_trans_d3_suspend(mvm->trans, test);
1102  out:
1103         if (ret < 0)
1104                 ieee80211_restart_hw(mvm->hw);
1105  out_noreset:
1106         mutex_unlock(&mvm->mutex);
1107
1108         return ret;
1109 }
1110
1111 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1112 {
1113         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1114
1115         if (iwl_mvm_is_d0i3_supported(mvm)) {
1116                 mutex_lock(&mvm->d0i3_suspend_mutex);
1117                 __set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1118                 mutex_unlock(&mvm->d0i3_suspend_mutex);
1119                 return 0;
1120         }
1121
1122         return __iwl_mvm_suspend(hw, wowlan, false);
1123 }
1124
1125 /* converted data from the different status responses */
1126 struct iwl_wowlan_status_data {
1127         u16 pattern_number;
1128         u16 qos_seq_ctr[8];
1129         u32 wakeup_reasons;
1130         u32 wake_packet_length;
1131         u32 wake_packet_bufsize;
1132         const u8 *wake_packet;
1133 };
1134
1135 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1136                                           struct ieee80211_vif *vif,
1137                                           struct iwl_wowlan_status_data *status)
1138 {
1139         struct sk_buff *pkt = NULL;
1140         struct cfg80211_wowlan_wakeup wakeup = {
1141                 .pattern_idx = -1,
1142         };
1143         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1144         u32 reasons = status->wakeup_reasons;
1145
1146         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1147                 wakeup_report = NULL;
1148                 goto report;
1149         }
1150
1151         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1152                 wakeup.magic_pkt = true;
1153
1154         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1155                 wakeup.pattern_idx =
1156                         status->pattern_number;
1157
1158         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1159                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1160                 wakeup.disconnect = true;
1161
1162         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1163                 wakeup.gtk_rekey_failure = true;
1164
1165         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1166                 wakeup.rfkill_release = true;
1167
1168         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1169                 wakeup.eap_identity_req = true;
1170
1171         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1172                 wakeup.four_way_handshake = true;
1173
1174         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1175                 wakeup.tcp_connlost = true;
1176
1177         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1178                 wakeup.tcp_nomoretokens = true;
1179
1180         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1181                 wakeup.tcp_match = true;
1182
1183         if (status->wake_packet_bufsize) {
1184                 int pktsize = status->wake_packet_bufsize;
1185                 int pktlen = status->wake_packet_length;
1186                 const u8 *pktdata = status->wake_packet;
1187                 struct ieee80211_hdr *hdr = (void *)pktdata;
1188                 int truncated = pktlen - pktsize;
1189
1190                 /* this would be a firmware bug */
1191                 if (WARN_ON_ONCE(truncated < 0))
1192                         truncated = 0;
1193
1194                 if (ieee80211_is_data(hdr->frame_control)) {
1195                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1196                         int ivlen = 0, icvlen = 4; /* also FCS */
1197
1198                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1199                         if (!pkt)
1200                                 goto report;
1201
1202                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1203                         pktdata += hdrlen;
1204                         pktsize -= hdrlen;
1205
1206                         if (ieee80211_has_protected(hdr->frame_control)) {
1207                                 /*
1208                                  * This is unlocked and using gtk_i(c)vlen,
1209                                  * but since everything is under RTNL still
1210                                  * that's not really a problem - changing
1211                                  * it would be difficult.
1212                                  */
1213                                 if (is_multicast_ether_addr(hdr->addr1)) {
1214                                         ivlen = mvm->gtk_ivlen;
1215                                         icvlen += mvm->gtk_icvlen;
1216                                 } else {
1217                                         ivlen = mvm->ptk_ivlen;
1218                                         icvlen += mvm->ptk_icvlen;
1219                                 }
1220                         }
1221
1222                         /* if truncated, FCS/ICV is (partially) gone */
1223                         if (truncated >= icvlen) {
1224                                 icvlen = 0;
1225                                 truncated -= icvlen;
1226                         } else {
1227                                 icvlen -= truncated;
1228                                 truncated = 0;
1229                         }
1230
1231                         pktsize -= ivlen + icvlen;
1232                         pktdata += ivlen;
1233
1234                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1235
1236                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1237                                 goto report;
1238                         wakeup.packet = pkt->data;
1239                         wakeup.packet_present_len = pkt->len;
1240                         wakeup.packet_len = pkt->len - truncated;
1241                         wakeup.packet_80211 = false;
1242                 } else {
1243                         int fcslen = 4;
1244
1245                         if (truncated >= 4) {
1246                                 truncated -= 4;
1247                                 fcslen = 0;
1248                         } else {
1249                                 fcslen -= truncated;
1250                                 truncated = 0;
1251                         }
1252                         pktsize -= fcslen;
1253                         wakeup.packet = status->wake_packet;
1254                         wakeup.packet_present_len = pktsize;
1255                         wakeup.packet_len = pktlen - truncated;
1256                         wakeup.packet_80211 = true;
1257                 }
1258         }
1259
1260  report:
1261         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1262         kfree_skb(pkt);
1263 }
1264
1265 static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1266                                   struct ieee80211_key_seq *seq)
1267 {
1268         u64 pn;
1269
1270         pn = le64_to_cpu(sc->pn);
1271         seq->ccmp.pn[0] = pn >> 40;
1272         seq->ccmp.pn[1] = pn >> 32;
1273         seq->ccmp.pn[2] = pn >> 24;
1274         seq->ccmp.pn[3] = pn >> 16;
1275         seq->ccmp.pn[4] = pn >> 8;
1276         seq->ccmp.pn[5] = pn;
1277 }
1278
1279 static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1280                                    struct ieee80211_key_seq *seq)
1281 {
1282         seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1283         seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1284 }
1285
1286 static void iwl_mvm_set_aes_rx_seq(struct aes_sc *scs,
1287                                    struct ieee80211_key_conf *key)
1288 {
1289         int tid;
1290
1291         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1292
1293         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1294                 struct ieee80211_key_seq seq = {};
1295
1296                 iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1297                 ieee80211_set_key_rx_seq(key, tid, &seq);
1298         }
1299 }
1300
1301 static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1302                                     struct ieee80211_key_conf *key)
1303 {
1304         int tid;
1305
1306         BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1307
1308         for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1309                 struct ieee80211_key_seq seq = {};
1310
1311                 iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1312                 ieee80211_set_key_rx_seq(key, tid, &seq);
1313         }
1314 }
1315
1316 static void iwl_mvm_set_key_rx_seq(struct ieee80211_key_conf *key,
1317                                    struct iwl_wowlan_status *status)
1318 {
1319         union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1320
1321         switch (key->cipher) {
1322         case WLAN_CIPHER_SUITE_CCMP:
1323                 iwl_mvm_set_aes_rx_seq(rsc->aes.multicast_rsc, key);
1324                 break;
1325         case WLAN_CIPHER_SUITE_TKIP:
1326                 iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1327                 break;
1328         default:
1329                 WARN_ON(1);
1330         }
1331 }
1332
1333 struct iwl_mvm_d3_gtk_iter_data {
1334         struct iwl_wowlan_status *status;
1335         void *last_gtk;
1336         u32 cipher;
1337         bool find_phase, unhandled_cipher;
1338         int num_keys;
1339 };
1340
1341 static void iwl_mvm_d3_update_gtks(struct ieee80211_hw *hw,
1342                                    struct ieee80211_vif *vif,
1343                                    struct ieee80211_sta *sta,
1344                                    struct ieee80211_key_conf *key,
1345                                    void *_data)
1346 {
1347         struct iwl_mvm_d3_gtk_iter_data *data = _data;
1348
1349         if (data->unhandled_cipher)
1350                 return;
1351
1352         switch (key->cipher) {
1353         case WLAN_CIPHER_SUITE_WEP40:
1354         case WLAN_CIPHER_SUITE_WEP104:
1355                 /* ignore WEP completely, nothing to do */
1356                 return;
1357         case WLAN_CIPHER_SUITE_CCMP:
1358         case WLAN_CIPHER_SUITE_TKIP:
1359                 /* we support these */
1360                 break;
1361         default:
1362                 /* everything else (even CMAC for MFP) - disconnect from AP */
1363                 data->unhandled_cipher = true;
1364                 return;
1365         }
1366
1367         data->num_keys++;
1368
1369         /*
1370          * pairwise key - update sequence counters only;
1371          * note that this assumes no TDLS sessions are active
1372          */
1373         if (sta) {
1374                 struct ieee80211_key_seq seq = {};
1375                 union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1376
1377                 if (data->find_phase)
1378                         return;
1379
1380                 switch (key->cipher) {
1381                 case WLAN_CIPHER_SUITE_CCMP:
1382                         iwl_mvm_aes_sc_to_seq(&sc->aes.tsc, &seq);
1383                         iwl_mvm_set_aes_rx_seq(sc->aes.unicast_rsc, key);
1384                         break;
1385                 case WLAN_CIPHER_SUITE_TKIP:
1386                         iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1387                         iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1388                         break;
1389                 }
1390                 ieee80211_set_key_tx_seq(key, &seq);
1391
1392                 /* that's it for this key */
1393                 return;
1394         }
1395
1396         if (data->find_phase) {
1397                 data->last_gtk = key;
1398                 data->cipher = key->cipher;
1399                 return;
1400         }
1401
1402         if (data->status->num_of_gtk_rekeys)
1403                 ieee80211_remove_key(key);
1404         else if (data->last_gtk == key)
1405                 iwl_mvm_set_key_rx_seq(key, data->status);
1406 }
1407
1408 static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1409                                           struct ieee80211_vif *vif,
1410                                           struct iwl_wowlan_status *status)
1411 {
1412         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1413         struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1414                 .status = status,
1415         };
1416         u32 disconnection_reasons =
1417                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1418                 IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1419
1420         if (!status || !vif->bss_conf.bssid)
1421                 return false;
1422
1423         if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1424                 return false;
1425
1426         /* find last GTK that we used initially, if any */
1427         gtkdata.find_phase = true;
1428         ieee80211_iter_keys(mvm->hw, vif,
1429                             iwl_mvm_d3_update_gtks, &gtkdata);
1430         /* not trying to keep connections with MFP/unhandled ciphers */
1431         if (gtkdata.unhandled_cipher)
1432                 return false;
1433         if (!gtkdata.num_keys)
1434                 goto out;
1435         if (!gtkdata.last_gtk)
1436                 return false;
1437
1438         /*
1439          * invalidate all other GTKs that might still exist and update
1440          * the one that we used
1441          */
1442         gtkdata.find_phase = false;
1443         ieee80211_iter_keys(mvm->hw, vif,
1444                             iwl_mvm_d3_update_gtks, &gtkdata);
1445
1446         if (status->num_of_gtk_rekeys) {
1447                 struct ieee80211_key_conf *key;
1448                 struct {
1449                         struct ieee80211_key_conf conf;
1450                         u8 key[32];
1451                 } conf = {
1452                         .conf.cipher = gtkdata.cipher,
1453                         .conf.keyidx = status->gtk.key_index,
1454                 };
1455
1456                 switch (gtkdata.cipher) {
1457                 case WLAN_CIPHER_SUITE_CCMP:
1458                         conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1459                         memcpy(conf.conf.key, status->gtk.decrypt_key,
1460                                WLAN_KEY_LEN_CCMP);
1461                         break;
1462                 case WLAN_CIPHER_SUITE_TKIP:
1463                         conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1464                         memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1465                         /* leave TX MIC key zeroed, we don't use it anyway */
1466                         memcpy(conf.conf.key +
1467                                NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1468                                status->gtk.tkip_mic_key, 8);
1469                         break;
1470                 }
1471
1472                 key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1473                 if (IS_ERR(key))
1474                         return false;
1475                 iwl_mvm_set_key_rx_seq(key, status);
1476         }
1477
1478         if (status->num_of_gtk_rekeys) {
1479                 __be64 replay_ctr =
1480                         cpu_to_be64(le64_to_cpu(status->replay_ctr));
1481                 ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1482                                            (void *)&replay_ctr, GFP_KERNEL);
1483         }
1484
1485 out:
1486         mvmvif->seqno_valid = true;
1487         /* +0x10 because the set API expects next-to-use, not last-used */
1488         mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1489
1490         return true;
1491 }
1492
1493 static struct iwl_wowlan_status *
1494 iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1495 {
1496         u32 base = mvm->error_event_table;
1497         struct error_table_start {
1498                 /* cf. struct iwl_error_event_table */
1499                 u32 valid;
1500                 u32 error_id;
1501         } err_info;
1502         struct iwl_host_cmd cmd = {
1503                 .id = WOWLAN_GET_STATUSES,
1504                 .flags = CMD_WANT_SKB,
1505         };
1506         struct iwl_wowlan_status *status, *fw_status;
1507         int ret, len, status_size;
1508
1509         iwl_trans_read_mem_bytes(mvm->trans, base,
1510                                  &err_info, sizeof(err_info));
1511
1512         if (err_info.valid) {
1513                 IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1514                          err_info.valid, err_info.error_id);
1515                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1516                         struct cfg80211_wowlan_wakeup wakeup = {
1517                                 .rfkill_release = true,
1518                         };
1519                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1520                                                        GFP_KERNEL);
1521                 }
1522                 return ERR_PTR(-EIO);
1523         }
1524
1525         /* only for tracing for now */
1526         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1527         if (ret)
1528                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1529
1530         ret = iwl_mvm_send_cmd(mvm, &cmd);
1531         if (ret) {
1532                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1533                 return ERR_PTR(ret);
1534         }
1535
1536         /* RF-kill already asserted again... */
1537         if (!cmd.resp_pkt) {
1538                 ret = -ERFKILL;
1539                 goto out_free_resp;
1540         }
1541
1542         status_size = sizeof(*fw_status);
1543
1544         len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1545         if (len < status_size) {
1546                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1547                 ret = -EIO;
1548                 goto out_free_resp;
1549         }
1550
1551         status = (void *)cmd.resp_pkt->data;
1552         if (len != (status_size +
1553                     ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1554                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1555                 ret = -EIO;
1556                 goto out_free_resp;
1557         }
1558
1559         fw_status = kmemdup(status, len, GFP_KERNEL);
1560
1561 out_free_resp:
1562         iwl_free_resp(&cmd);
1563         return ret ? ERR_PTR(ret) : fw_status;
1564 }
1565
1566 /* releases the MVM mutex */
1567 static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1568                                          struct ieee80211_vif *vif)
1569 {
1570         struct iwl_wowlan_status_data status;
1571         struct iwl_wowlan_status *fw_status;
1572         int i;
1573         bool keep;
1574         struct ieee80211_sta *ap_sta;
1575         struct iwl_mvm_sta *mvm_ap_sta;
1576
1577         fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1578         if (IS_ERR_OR_NULL(fw_status))
1579                 goto out_unlock;
1580
1581         status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1582         for (i = 0; i < 8; i++)
1583                 status.qos_seq_ctr[i] =
1584                         le16_to_cpu(fw_status->qos_seq_ctr[i]);
1585         status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1586         status.wake_packet_length =
1587                 le32_to_cpu(fw_status->wake_packet_length);
1588         status.wake_packet_bufsize =
1589                 le32_to_cpu(fw_status->wake_packet_bufsize);
1590         status.wake_packet = fw_status->wake_packet;
1591
1592         /* still at hard-coded place 0 for D3 image */
1593         ap_sta = rcu_dereference_protected(
1594                         mvm->fw_id_to_mac_id[0],
1595                         lockdep_is_held(&mvm->mutex));
1596         if (IS_ERR_OR_NULL(ap_sta))
1597                 goto out_free;
1598
1599         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
1600         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1601                 u16 seq = status.qos_seq_ctr[i];
1602                 /* firmware stores last-used value, we store next value */
1603                 seq += 0x10;
1604                 mvm_ap_sta->tid_data[i].seq_number = seq;
1605         }
1606
1607         /* now we have all the data we need, unlock to avoid mac80211 issues */
1608         mutex_unlock(&mvm->mutex);
1609
1610         iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1611
1612         keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1613
1614         kfree(fw_status);
1615         return keep;
1616
1617 out_free:
1618         kfree(fw_status);
1619 out_unlock:
1620         mutex_unlock(&mvm->mutex);
1621         return false;
1622 }
1623
1624 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1625 {
1626 #ifdef CONFIG_IWLWIFI_DEBUGFS
1627         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1628         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1629         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1630
1631         if (!mvm->store_d3_resume_sram)
1632                 return;
1633
1634         if (!mvm->d3_resume_sram) {
1635                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1636                 if (!mvm->d3_resume_sram)
1637                         return;
1638         }
1639
1640         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1641 #endif
1642 }
1643
1644 static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1645                                        struct ieee80211_vif *vif)
1646 {
1647         /* skip the one we keep connection on */
1648         if (data == vif)
1649                 return;
1650
1651         if (vif->type == NL80211_IFTYPE_STATION)
1652                 ieee80211_resume_disconnect(vif);
1653 }
1654
1655 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1656 {
1657         struct ieee80211_vif *vif = NULL;
1658         int ret;
1659         enum iwl_d3_status d3_status;
1660         bool keep = false;
1661
1662         mutex_lock(&mvm->mutex);
1663
1664         /* get the BSS vif pointer again */
1665         vif = iwl_mvm_get_bss_vif(mvm);
1666         if (IS_ERR_OR_NULL(vif))
1667                 goto out_unlock;
1668
1669         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1670         if (ret)
1671                 goto out_unlock;
1672
1673         if (d3_status != IWL_D3_STATUS_ALIVE) {
1674                 IWL_INFO(mvm, "Device was reset during suspend\n");
1675                 goto out_unlock;
1676         }
1677
1678         /* query SRAM first in case we want event logging */
1679         iwl_mvm_read_d3_sram(mvm);
1680
1681         keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1682 #ifdef CONFIG_IWLWIFI_DEBUGFS
1683         if (keep)
1684                 mvm->keep_vif = vif;
1685 #endif
1686         /* has unlocked the mutex, so skip that */
1687         goto out;
1688
1689  out_unlock:
1690         mutex_unlock(&mvm->mutex);
1691
1692  out:
1693         if (!test)
1694                 ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1695                         IEEE80211_IFACE_ITER_NORMAL,
1696                         iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1697
1698         /* return 1 to reconfigure the device */
1699         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1700         set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
1701         return 1;
1702 }
1703
1704 int iwl_mvm_resume(struct ieee80211_hw *hw)
1705 {
1706         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1707
1708         if (iwl_mvm_is_d0i3_supported(mvm))
1709                 return 0;
1710
1711         return __iwl_mvm_resume(mvm, false);
1712 }
1713
1714 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1715 {
1716         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1717
1718         device_set_wakeup_enable(mvm->trans->dev, enabled);
1719 }
1720
1721 #ifdef CONFIG_IWLWIFI_DEBUGFS
1722 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1723 {
1724         struct iwl_mvm *mvm = inode->i_private;
1725         int err;
1726
1727         if (mvm->d3_test_active)
1728                 return -EBUSY;
1729
1730         file->private_data = inode->i_private;
1731
1732         ieee80211_stop_queues(mvm->hw);
1733         synchronize_net();
1734
1735         /* start pseudo D3 */
1736         rtnl_lock();
1737         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1738         rtnl_unlock();
1739         if (err > 0)
1740                 err = -EINVAL;
1741         if (err) {
1742                 ieee80211_wake_queues(mvm->hw);
1743                 return err;
1744         }
1745         mvm->d3_test_active = true;
1746         mvm->keep_vif = NULL;
1747         return 0;
1748 }
1749
1750 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1751                                     size_t count, loff_t *ppos)
1752 {
1753         struct iwl_mvm *mvm = file->private_data;
1754         u32 pme_asserted;
1755
1756         while (true) {
1757                 /* read pme_ptr if available */
1758                 if (mvm->d3_test_pme_ptr) {
1759                         pme_asserted = iwl_trans_read_mem32(mvm->trans,
1760                                                 mvm->d3_test_pme_ptr);
1761                         if (pme_asserted)
1762                                 break;
1763                 }
1764
1765                 if (msleep_interruptible(100))
1766                         break;
1767         }
1768
1769         return 0;
1770 }
1771
1772 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1773                                               struct ieee80211_vif *vif)
1774 {
1775         /* skip the one we keep connection on */
1776         if (_data == vif)
1777                 return;
1778
1779         if (vif->type == NL80211_IFTYPE_STATION)
1780                 ieee80211_connection_loss(vif);
1781 }
1782
1783 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1784 {
1785         struct iwl_mvm *mvm = inode->i_private;
1786         int remaining_time = 10;
1787
1788         mvm->d3_test_active = false;
1789         rtnl_lock();
1790         __iwl_mvm_resume(mvm, true);
1791         rtnl_unlock();
1792         iwl_abort_notification_waits(&mvm->notif_wait);
1793         ieee80211_restart_hw(mvm->hw);
1794
1795         /* wait for restart and disconnect all interfaces */
1796         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1797                remaining_time > 0) {
1798                 remaining_time--;
1799                 msleep(1000);
1800         }
1801
1802         if (remaining_time == 0)
1803                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1804
1805         ieee80211_iterate_active_interfaces_atomic(
1806                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1807                 iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
1808
1809         ieee80211_wake_queues(mvm->hw);
1810
1811         return 0;
1812 }
1813
1814 const struct file_operations iwl_dbgfs_d3_test_ops = {
1815         .llseek = no_llseek,
1816         .open = iwl_mvm_d3_test_open,
1817         .read = iwl_mvm_d3_test_read,
1818         .release = iwl_mvm_d3_test_release,
1819 };
1820 #endif