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 - 2013 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
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  20  * along with this program; if not, write to the Free Software
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  22  * USA
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  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  30  *
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  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  41  *    notice, this list of conditions and the following disclaimer.
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  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63
  64 #include <linux/etherdevice.h>
  65 #include <linux/ip.h>
  66 #include <linux/fs.h>
  67 #include <net/cfg80211.h>
  68 #include <net/ipv6.h>
  69 #include <net/tcp.h>
  70 #include "iwl-modparams.h"
  71 #include "fw-api.h"
  72 #include "mvm.h"
  73
  74 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  75                             struct ieee80211_vif *vif,
  76                             struct cfg80211_gtk_rekey_data *data)
  77 {
  78         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  79         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  80
  81         if (iwlwifi_mod_params.sw_crypto)
  82                 return;
  83
  84         mutex_lock(&mvm->mutex);
  85
  86         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  87         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  88         mvmvif->rekey_data.replay_ctr =
  89                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
  90         mvmvif->rekey_data.valid = true;
  91
  92         mutex_unlock(&mvm->mutex);
  93 }
  94
  95 #if IS_ENABLED(CONFIG_IPV6)
  96 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
  97                               struct ieee80211_vif *vif,
  98                               struct inet6_dev *idev)
  99 {
 100         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 101         struct inet6_ifaddr *ifa;
 102         int idx = 0;
 103
 104         read_lock_bh(&idev->lock);
 105         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 106                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 107                 idx++;
 108                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
 109                         break;
 110         }
 111         read_unlock_bh(&idev->lock);
 112
 113         mvmvif->num_target_ipv6_addrs = idx;
 114 }
 115 #endif
 116
 117 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 118                                      struct ieee80211_vif *vif, int idx)
 119 {
 120         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 121
 122         mvmvif->tx_key_idx = idx;
 123 }
 124
 125 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 126 {
 127         int i;
 128
 129         for (i = 0; i < IWL_P1K_SIZE; i++)
 130                 out[i] = cpu_to_le16(p1k[i]);
 131 }
 132
 133 struct wowlan_key_data {
 134         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 135         struct iwl_wowlan_tkip_params_cmd *tkip;
 136         bool error, use_rsc_tsc, use_tkip;
 137         int wep_key_idx;
 138 };
 139
 140 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 141                                         struct ieee80211_vif *vif,
 142                                         struct ieee80211_sta *sta,
 143                                         struct ieee80211_key_conf *key,
 144                                         void *_data)
 145 {
 146         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 147         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 148         struct wowlan_key_data *data = _data;
 149         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 150         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 151         struct iwl_p1k_cache *rx_p1ks;
 152         u8 *rx_mic_key;
 153         struct ieee80211_key_seq seq;
 154         u32 cur_rx_iv32 = 0;
 155         u16 p1k[IWL_P1K_SIZE];
 156         int ret, i;
 157
 158         mutex_lock(&mvm->mutex);
 159
 160         switch (key->cipher) {
 161         case WLAN_CIPHER_SUITE_WEP40:
 162         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 163                 struct {
 164                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 165                         struct iwl_mvm_wep_key wep_key;
 166                 } __packed wkc = {
 167                         .wep_key_cmd.mac_id_n_color =
 168                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 169                                                                 mvmvif->color)),
 170                         .wep_key_cmd.num_keys = 1,
 171                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 172                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 173                         .wep_key.key_index = key->keyidx,
 174                         .wep_key.key_size = key->keylen,
 175                 };
 176
 177                 /*
 178                  * This will fail -- the key functions don't set support
 179                  * pairwise WEP keys. However, that's better than silently
 180                  * failing WoWLAN. Or maybe not?
 181                  */
 182                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 183                         break;
 184
 185                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 186                 if (key->keyidx == mvmvif->tx_key_idx) {
 187                         /* TX key must be at offset 0 */
 188                         wkc.wep_key.key_offset = 0;
 189                 } else {
 190                         /* others start at 1 */
 191                         data->wep_key_idx++;
 192                         wkc.wep_key.key_offset = data->wep_key_idx;
 193                 }
 194
 195                 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
 196                                            sizeof(wkc), &wkc);
 197                 data->error = ret != 0;
 198
 199                 mvm->ptk_ivlen = key->iv_len;
 200                 mvm->ptk_icvlen = key->icv_len;
 201                 mvm->gtk_ivlen = key->iv_len;
 202                 mvm->gtk_icvlen = key->icv_len;
 203
 204                 /* don't upload key again */
 205                 goto out_unlock;
 206         }
 207         default:
 208                 data->error = true;
 209                 goto out_unlock;
 210         case WLAN_CIPHER_SUITE_AES_CMAC:
 211                 /*
 212                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 213                  * but we also shouldn't abort suspend due to that. It does have
 214                  * support for the IGTK key renewal, but doesn't really use the
 215                  * IGTK for anything. This means we could spuriously wake up or
 216                  * be deauthenticated, but that was considered acceptable.
 217                  */
 218                 goto out_unlock;
 219         case WLAN_CIPHER_SUITE_TKIP:
 220                 if (sta) {
 221                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 222                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 223
 224                         rx_p1ks = data->tkip->rx_uni;
 225
 226                         ieee80211_get_key_tx_seq(key, &seq);
 227                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 228                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 229
 230                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 231                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 232
 233                         memcpy(data->tkip->mic_keys.tx,
 234                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 235                                IWL_MIC_KEY_SIZE);
 236
 237                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 238                 } else {
 239                         tkip_sc =
 240                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 241                         rx_p1ks = data->tkip->rx_multi;
 242                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 243                 }
 244
 245                 /*
 246                  * For non-QoS this relies on the fact that both the uCode and
 247                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 248                  * for checking the IV in the frames.
 249                  */
 250                 for (i = 0; i < IWL_NUM_RSC; i++) {
 251                         ieee80211_get_key_rx_seq(key, i, &seq);
 252                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 253                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 254                         /* wrapping isn't allowed, AP must rekey */
 255                         if (seq.tkip.iv32 > cur_rx_iv32)
 256                                 cur_rx_iv32 = seq.tkip.iv32;
 257                 }
 258
 259                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 260                                           cur_rx_iv32, p1k);
 261                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 262                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 263                                           cur_rx_iv32 + 1, p1k);
 264                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 265
 266                 memcpy(rx_mic_key,
 267                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 268                        IWL_MIC_KEY_SIZE);
 269
 270                 data->use_tkip = true;
 271                 data->use_rsc_tsc = true;
 272                 break;
 273         case WLAN_CIPHER_SUITE_CCMP:
 274                 if (sta) {
 275                         u8 *pn = seq.ccmp.pn;
 276
 277                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 278                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 279
 280                         ieee80211_get_key_tx_seq(key, &seq);
 281                         aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
 282                                                     ((u64)pn[4] << 8) |
 283                                                     ((u64)pn[3] << 16) |
 284                                                     ((u64)pn[2] << 24) |
 285                                                     ((u64)pn[1] << 32) |
 286                                                     ((u64)pn[0] << 40));
 287                 } else {
 288                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 289                 }
 290
 291                 /*
 292                  * For non-QoS this relies on the fact that both the uCode and
 293                  * mac80211 use TID 0 for checking the IV in the frames.
 294                  */
 295                 for (i = 0; i < IWL_NUM_RSC; i++) {
 296                         u8 *pn = seq.ccmp.pn;
 297
 298                         ieee80211_get_key_rx_seq(key, i, &seq);
 299                         aes_sc->pn = cpu_to_le64((u64)pn[5] |
 300                                                  ((u64)pn[4] << 8) |
 301                                                  ((u64)pn[3] << 16) |
 302                                                  ((u64)pn[2] << 24) |
 303                                                  ((u64)pn[1] << 32) |
 304                                                  ((u64)pn[0] << 40));
 305                 }
 306                 data->use_rsc_tsc = true;
 307                 break;
 308         }
 309
 310         /*
 311          * The D3 firmware hardcodes the key offset 0 as the key it uses
 312          * to transmit packets to the AP, i.e. the PTK.
 313          */
 314         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 315                 key->hw_key_idx = 0;
 316                 mvm->ptk_ivlen = key->iv_len;
 317                 mvm->ptk_icvlen = key->icv_len;
 318         } else {
 319                 /*
 320                  * firmware only supports TSC/RSC for a single key,
 321                  * so if there are multiple keep overwriting them
 322                  * with new ones -- this relies on mac80211 doing
 323                  * list_add_tail().
 324                  */
 325                 key->hw_key_idx = 1;
 326                 mvm->gtk_ivlen = key->iv_len;
 327                 mvm->gtk_icvlen = key->icv_len;
 328         }
 329
 330         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 331         data->error = ret != 0;
 332 out_unlock:
 333         mutex_unlock(&mvm->mutex);
 334 }
 335
 336 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 337                                  struct cfg80211_wowlan *wowlan)
 338 {
 339         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 340         struct iwl_host_cmd cmd = {
 341                 .id = WOWLAN_PATTERNS,
 342                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 343                 .flags = CMD_SYNC,
 344         };
 345         int i, err;
 346
 347         if (!wowlan->n_patterns)
 348                 return 0;
 349
 350         cmd.len[0] = sizeof(*pattern_cmd) +
 351                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 352
 353         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 354         if (!pattern_cmd)
 355                 return -ENOMEM;
 356
 357         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 358
 359         for (i = 0; i < wowlan->n_patterns; i++) {
 360                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 361
 362                 memcpy(&pattern_cmd->patterns[i].mask,
 363                        wowlan->patterns[i].mask, mask_len);
 364                 memcpy(&pattern_cmd->patterns[i].pattern,
 365                        wowlan->patterns[i].pattern,
 366                        wowlan->patterns[i].pattern_len);
 367                 pattern_cmd->patterns[i].mask_size = mask_len;
 368                 pattern_cmd->patterns[i].pattern_size =
 369                         wowlan->patterns[i].pattern_len;
 370         }
 371
 372         cmd.data[0] = pattern_cmd;
 373         err = iwl_mvm_send_cmd(mvm, &cmd);
 374         kfree(pattern_cmd);
 375         return err;
 376 }
 377
 378 static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
 379                                       struct ieee80211_vif *vif)
 380 {
 381         union {
 382                 struct iwl_proto_offload_cmd_v1 v1;
 383                 struct iwl_proto_offload_cmd_v2 v2;
 384         } cmd = {};
 385         struct iwl_proto_offload_cmd_common *common;
 386         u32 enabled = 0, size;
 387 #if IS_ENABLED(CONFIG_IPV6)
 388         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 389         int i;
 390
 391         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
 392                 if (mvmvif->num_target_ipv6_addrs) {
 393                         enabled |= IWL_D3_PROTO_OFFLOAD_NS;
 394                         memcpy(cmd.v2.ndp_mac_addr, vif->addr, ETH_ALEN);
 395                 }
 396
 397                 BUILD_BUG_ON(sizeof(cmd.v2.target_ipv6_addr[0]) !=
 398                              sizeof(mvmvif->target_ipv6_addrs[0]));
 399
 400                 for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
 401                                     IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V2); i++)
 402                         memcpy(cmd.v2.target_ipv6_addr[i],
 403                                &mvmvif->target_ipv6_addrs[i],
 404                                sizeof(cmd.v2.target_ipv6_addr[i]));
 405         } else {
 406                 if (mvmvif->num_target_ipv6_addrs) {
 407                         enabled |= IWL_D3_PROTO_OFFLOAD_NS;
 408                         memcpy(cmd.v1.ndp_mac_addr, vif->addr, ETH_ALEN);
 409                 }
 410
 411                 BUILD_BUG_ON(sizeof(cmd.v1.target_ipv6_addr[0]) !=
 412                              sizeof(mvmvif->target_ipv6_addrs[0]));
 413
 414                 for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
 415                                     IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V1); i++)
 416                         memcpy(cmd.v1.target_ipv6_addr[i],
 417                                &mvmvif->target_ipv6_addrs[i],
 418                                sizeof(cmd.v1.target_ipv6_addr[i]));
 419         }
 420 #endif
 421
 422         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
 423                 common = &cmd.v2.common;
 424                 size = sizeof(cmd.v2);
 425         } else {
 426                 common = &cmd.v1.common;
 427                 size = sizeof(cmd.v1);
 428         }
 429
 430         if (vif->bss_conf.arp_addr_cnt) {
 431                 enabled |= IWL_D3_PROTO_OFFLOAD_ARP;
 432                 common->host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
 433                 memcpy(common->arp_mac_addr, vif->addr, ETH_ALEN);
 434         }
 435
 436         if (!enabled)
 437                 return 0;
 438
 439         common->enabled = cpu_to_le32(enabled);
 440
 441         return iwl_mvm_send_cmd_pdu(mvm, PROT_OFFLOAD_CONFIG_CMD, CMD_SYNC,
 442                                     size, &cmd);
 443 }
 444
 445 enum iwl_mvm_tcp_packet_type {
 446         MVM_TCP_TX_SYN,
 447         MVM_TCP_RX_SYNACK,
 448         MVM_TCP_TX_DATA,
 449         MVM_TCP_RX_ACK,
 450         MVM_TCP_RX_WAKE,
 451         MVM_TCP_TX_FIN,
 452 };
 453
 454 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 455 {
 456         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 457         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 458 }
 459
 460 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
 461                                      struct cfg80211_wowlan_tcp *tcp,
 462                                      void *_pkt, u8 *mask,
 463                                      __le16 *pseudo_hdr_csum,
 464                                      enum iwl_mvm_tcp_packet_type ptype)
 465 {
 466         struct {
 467                 struct ethhdr eth;
 468                 struct iphdr ip;
 469                 struct tcphdr tcp;
 470                 u8 data[];
 471         } __packed *pkt = _pkt;
 472         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 473         int i;
 474
 475         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 476         pkt->ip.version = 4;
 477         pkt->ip.ihl = 5;
 478         pkt->ip.protocol = IPPROTO_TCP;
 479
 480         switch (ptype) {
 481         case MVM_TCP_TX_SYN:
 482         case MVM_TCP_TX_DATA:
 483         case MVM_TCP_TX_FIN:
 484                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 485                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 486                 pkt->ip.ttl = 128;
 487                 pkt->ip.saddr = tcp->src;
 488                 pkt->ip.daddr = tcp->dst;
 489                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 490                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 491                 /* overwritten for TX SYN later */
 492                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 493                 pkt->tcp.window = cpu_to_be16(65000);
 494                 break;
 495         case MVM_TCP_RX_SYNACK:
 496         case MVM_TCP_RX_ACK:
 497         case MVM_TCP_RX_WAKE:
 498                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 499                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 500                 pkt->ip.saddr = tcp->dst;
 501                 pkt->ip.daddr = tcp->src;
 502                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 503                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 504                 break;
 505         default:
 506                 WARN_ON(1);
 507                 return;
 508         }
 509
 510         switch (ptype) {
 511         case MVM_TCP_TX_SYN:
 512                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 513                 memset(pkt->data, 0x01, 8);
 514                 ip_tot_len += 8;
 515                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 516                 pkt->tcp.syn = 1;
 517                 break;
 518         case MVM_TCP_TX_DATA:
 519                 ip_tot_len += tcp->payload_len;
 520                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 521                 pkt->tcp.psh = 1;
 522                 pkt->tcp.ack = 1;
 523                 break;
 524         case MVM_TCP_TX_FIN:
 525                 pkt->tcp.fin = 1;
 526                 pkt->tcp.ack = 1;
 527                 break;
 528         case MVM_TCP_RX_SYNACK:
 529                 pkt->tcp.syn = 1;
 530                 pkt->tcp.ack = 1;
 531                 break;
 532         case MVM_TCP_RX_ACK:
 533                 pkt->tcp.ack = 1;
 534                 break;
 535         case MVM_TCP_RX_WAKE:
 536                 ip_tot_len += tcp->wake_len;
 537                 pkt->tcp.psh = 1;
 538                 pkt->tcp.ack = 1;
 539                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 540                 break;
 541         }
 542
 543         switch (ptype) {
 544         case MVM_TCP_TX_SYN:
 545         case MVM_TCP_TX_DATA:
 546         case MVM_TCP_TX_FIN:
 547                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 548                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 549                 break;
 550         case MVM_TCP_RX_WAKE:
 551                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 552                         u8 tmp = tcp->wake_mask[i];
 553                         mask[i + 6] |= tmp << 6;
 554                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 555                                 mask[i + 7] = tmp >> 2;
 556                 }
 557                 /* fall through for ethernet/IP/TCP headers mask */
 558         case MVM_TCP_RX_SYNACK:
 559         case MVM_TCP_RX_ACK:
 560                 mask[0] = 0xff; /* match ethernet */
 561                 /*
 562                  * match ethernet, ip.version, ip.ihl
 563                  * the ip.ihl half byte is really masked out by firmware
 564                  */
 565                 mask[1] = 0x7f;
 566                 mask[2] = 0x80; /* match ip.protocol */
 567                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 568                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 569                 mask[5] = 0x80; /* match tcp flags */
 570                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 571                 break;
 572         };
 573
 574         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 575                                             pkt->ip.saddr, pkt->ip.daddr);
 576 }
 577
 578 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 579                                         struct ieee80211_vif *vif,
 580                                         struct cfg80211_wowlan_tcp *tcp)
 581 {
 582         struct iwl_wowlan_remote_wake_config *cfg;
 583         struct iwl_host_cmd cmd = {
 584                 .id = REMOTE_WAKE_CONFIG_CMD,
 585                 .len = { sizeof(*cfg), },
 586                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 587                 .flags = CMD_SYNC,
 588         };
 589         int ret;
 590
 591         if (!tcp)
 592                 return 0;
 593
 594         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 595         if (!cfg)
 596                 return -ENOMEM;
 597         cmd.data[0] = cfg;
 598
 599         cfg->max_syn_retries = 10;
 600         cfg->max_data_retries = 10;
 601         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 602         cfg->tcp_ack_timeout = 1; /* seconds */
 603
 604         /* SYN (TX) */
 605         iwl_mvm_build_tcp_packet(
 606                 vif, tcp, cfg->syn_tx.data, NULL,
 607                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 608                 MVM_TCP_TX_SYN);
 609         cfg->syn_tx.info.tcp_payload_length = 0;
 610
 611         /* SYN/ACK (RX) */
 612         iwl_mvm_build_tcp_packet(
 613                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 614                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 615                 MVM_TCP_RX_SYNACK);
 616         cfg->synack_rx.info.tcp_payload_length = 0;
 617
 618         /* KEEPALIVE/ACK (TX) */
 619         iwl_mvm_build_tcp_packet(
 620                 vif, tcp, cfg->keepalive_tx.data, NULL,
 621                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 622                 MVM_TCP_TX_DATA);
 623         cfg->keepalive_tx.info.tcp_payload_length =
 624                 cpu_to_le16(tcp->payload_len);
 625         cfg->sequence_number_offset = tcp->payload_seq.offset;
 626         /* length must be 0..4, the field is little endian */
 627         cfg->sequence_number_length = tcp->payload_seq.len;
 628         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 629         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 630         if (tcp->payload_tok.len) {
 631                 cfg->token_offset = tcp->payload_tok.offset;
 632                 cfg->token_length = tcp->payload_tok.len;
 633                 cfg->num_tokens =
 634                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 635                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 636                        tcp->tokens_size);
 637         } else {
 638                 /* set tokens to max value to almost never run out */
 639                 cfg->num_tokens = cpu_to_le16(65535);
 640         }
 641
 642         /* ACK (RX) */
 643         iwl_mvm_build_tcp_packet(
 644                 vif, tcp, cfg->keepalive_ack_rx.data,
 645                 cfg->keepalive_ack_rx.rx_mask,
 646                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 647                 MVM_TCP_RX_ACK);
 648         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 649
 650         /* WAKEUP (RX) */
 651         iwl_mvm_build_tcp_packet(
 652                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 653                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 654                 MVM_TCP_RX_WAKE);
 655         cfg->wake_rx.info.tcp_payload_length =
 656                 cpu_to_le16(tcp->wake_len);
 657
 658         /* FIN */
 659         iwl_mvm_build_tcp_packet(
 660                 vif, tcp, cfg->fin_tx.data, NULL,
 661                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 662                 MVM_TCP_TX_FIN);
 663         cfg->fin_tx.info.tcp_payload_length = 0;
 664
 665         ret = iwl_mvm_send_cmd(mvm, &cmd);
 666         kfree(cfg);
 667
 668         return ret;
 669 }
 670
 671 struct iwl_d3_iter_data {
 672         struct iwl_mvm *mvm;
 673         struct ieee80211_vif *vif;
 674         bool error;
 675 };
 676
 677 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
 678                                       struct ieee80211_vif *vif)
 679 {
 680         struct iwl_d3_iter_data *data = _data;
 681         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 682
 683         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 684                 return;
 685
 686         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 687                 return;
 688
 689         if (data->vif) {
 690                 IWL_ERR(data->mvm, "More than one managed interface active!\n");
 691                 data->error = true;
 692                 return;
 693         }
 694
 695         data->vif = vif;
 696 }
 697
 698 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 699                                 struct ieee80211_sta *ap_sta)
 700 {
 701         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 702         struct ieee80211_chanctx_conf *ctx;
 703         u8 chains_static, chains_dynamic;
 704         struct cfg80211_chan_def chandef;
 705         int ret, i;
 706         struct iwl_binding_cmd binding_cmd = {};
 707         struct iwl_time_quota_cmd quota_cmd = {};
 708         u32 status;
 709
 710         /* add back the PHY */
 711         if (WARN_ON(!mvmvif->phy_ctxt))
 712                 return -EINVAL;
 713
 714         rcu_read_lock();
 715         ctx = rcu_dereference(vif->chanctx_conf);
 716         if (WARN_ON(!ctx)) {
 717                 rcu_read_unlock();
 718                 return -EINVAL;
 719         }
 720         chandef = ctx->def;
 721         chains_static = ctx->rx_chains_static;
 722         chains_dynamic = ctx->rx_chains_dynamic;
 723         rcu_read_unlock();
 724
 725         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 726                                    chains_static, chains_dynamic);
 727         if (ret)
 728                 return ret;
 729
 730         /* add back the MAC */
 731         mvmvif->uploaded = false;
 732
 733         if (WARN_ON(!vif->bss_conf.assoc))
 734                 return -EINVAL;
 735         /* hack */
 736         vif->bss_conf.assoc = false;
 737         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 738         vif->bss_conf.assoc = true;
 739         if (ret)
 740                 return ret;
 741
 742         /* add back binding - XXX refactor? */
 743         binding_cmd.id_and_color =
 744                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 745                                                 mvmvif->phy_ctxt->color));
 746         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 747         binding_cmd.phy =
 748                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 749                                                 mvmvif->phy_ctxt->color));
 750         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 751                                                               mvmvif->color));
 752         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 753                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 754
 755         status = 0;
 756         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 757                                           sizeof(binding_cmd), &binding_cmd,
 758                                           &status);
 759         if (ret) {
 760                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 761                 return ret;
 762         }
 763
 764         if (status) {
 765                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 766                 return -EIO;
 767         }
 768
 769         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 770         if (ret)
 771                 return ret;
 772         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 773
 774         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 775         if (ret)
 776                 return ret;
 777
 778         /* and some quota */
 779         quota_cmd.quotas[0].id_and_color =
 780                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 781                                                 mvmvif->phy_ctxt->color));
 782         quota_cmd.quotas[0].quota = cpu_to_le32(100);
 783         quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
 784
 785         for (i = 1; i < MAX_BINDINGS; i++)
 786                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 787
 788         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 789                                    sizeof(quota_cmd), &quota_cmd);
 790         if (ret)
 791                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 792
 793         return 0;
 794 }
 795
 796 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 797                              struct cfg80211_wowlan *wowlan,
 798                              bool test)
 799 {
 800         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 801         struct iwl_d3_iter_data suspend_iter_data = {
 802                 .mvm = mvm,
 803         };
 804         struct ieee80211_vif *vif;
 805         struct iwl_mvm_vif *mvmvif;
 806         struct ieee80211_sta *ap_sta;
 807         struct iwl_mvm_sta *mvm_ap_sta;
 808         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 809         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 810         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 811         struct iwl_d3_manager_config d3_cfg_cmd_data = {
 812                 /*
 813                  * Program the minimum sleep time to 10 seconds, as many
 814                  * platforms have issues processing a wakeup signal while
 815                  * still being in the process of suspending.
 816                  */
 817                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
 818         };
 819         struct iwl_host_cmd d3_cfg_cmd = {
 820                 .id = D3_CONFIG_CMD,
 821                 .flags = CMD_SYNC | CMD_WANT_SKB,
 822                 .data[0] = &d3_cfg_cmd_data,
 823                 .len[0] = sizeof(d3_cfg_cmd_data),
 824         };
 825         struct wowlan_key_data key_data = {
 826                 .use_rsc_tsc = false,
 827                 .tkip = &tkip_cmd,
 828                 .use_tkip = false,
 829         };
 830         int ret, i;
 831         int len __maybe_unused;
 832         u16 seq;
 833         u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
 834
 835         if (!wowlan) {
 836                 /*
 837                  * mac80211 shouldn't get here, but for D3 test
 838                  * it doesn't warrant a warning
 839                  */
 840                 WARN_ON(!test);
 841                 return -EINVAL;
 842         }
 843
 844         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 845         if (!key_data.rsc_tsc)
 846                 return -ENOMEM;
 847
 848         mutex_lock(&mvm->mutex);
 849
 850         old_aux_sta_id = mvm->aux_sta.sta_id;
 851
 852         /* see if there's only a single BSS vif and it's associated */
 853         ieee80211_iterate_active_interfaces_atomic(
 854                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 855                 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
 856
 857         if (suspend_iter_data.error || !suspend_iter_data.vif) {
 858                 ret = 1;
 859                 goto out_noreset;
 860         }
 861
 862         vif = suspend_iter_data.vif;
 863         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 864
 865         ap_sta = rcu_dereference_protected(
 866                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 867                         lockdep_is_held(&mvm->mutex));
 868         if (IS_ERR_OR_NULL(ap_sta)) {
 869                 ret = -EINVAL;
 870                 goto out_noreset;
 871         }
 872
 873         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 874
 875         /*
 876          * The D3 firmware still hardcodes the AP station ID for the
 877          * BSS we're associated with as 0. Store the real STA ID here
 878          * and assign 0. When we leave this function, we'll restore
 879          * the original value for the resume code.
 880          */
 881         old_ap_sta_id = mvm_ap_sta->sta_id;
 882         mvm_ap_sta->sta_id = 0;
 883         mvmvif->ap_sta_id = 0;
 884
 885         /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
 886
 887         wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
 888
 889         /*
 890          * We know the last used seqno, and the uCode expects to know that
 891          * one, it will increment before TX.
 892          */
 893         seq = mvm_ap_sta->last_seq_ctl & IEEE80211_SCTL_SEQ;
 894         wowlan_config_cmd.non_qos_seq = cpu_to_le16(seq);
 895
 896         /*
 897          * For QoS counters, we store the one to use next, so subtract 0x10
 898          * since the uCode will add 0x10 *before* using the value while we
 899          * increment after using the value (i.e. store the next value to use).
 900          */
 901         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 902                 seq = mvm_ap_sta->tid_data[i].seq_number;
 903                 seq -= 0x10;
 904                 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
 905         }
 906
 907         if (wowlan->disconnect)
 908                 wowlan_config_cmd.wakeup_filter |=
 909                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 910                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 911         if (wowlan->magic_pkt)
 912                 wowlan_config_cmd.wakeup_filter |=
 913                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 914         if (wowlan->gtk_rekey_failure)
 915                 wowlan_config_cmd.wakeup_filter |=
 916                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 917         if (wowlan->eap_identity_req)
 918                 wowlan_config_cmd.wakeup_filter |=
 919                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 920         if (wowlan->four_way_handshake)
 921                 wowlan_config_cmd.wakeup_filter |=
 922                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 923         if (wowlan->n_patterns)
 924                 wowlan_config_cmd.wakeup_filter |=
 925                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 926
 927         if (wowlan->rfkill_release)
 928                 wowlan_config_cmd.wakeup_filter |=
 929                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 930
 931         if (wowlan->tcp) {
 932                 /*
 933                  * Set the "link change" (really "link lost") flag as well
 934                  * since that implies losing the TCP connection.
 935                  */
 936                 wowlan_config_cmd.wakeup_filter |=
 937                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 938                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 939                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 940                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 941         }
 942
 943         iwl_mvm_cancel_scan(mvm);
 944
 945         iwl_trans_stop_device(mvm->trans);
 946
 947         /*
 948          * Set the HW restart bit -- this is mostly true as we're
 949          * going to load new firmware and reprogram that, though
 950          * the reprogramming is going to be manual to avoid adding
 951          * all the MACs that aren't support.
 952          * We don't have to clear up everything though because the
 953          * reprogramming is manual. When we resume, we'll actually
 954          * go through a proper restart sequence again to switch
 955          * back to the runtime firmware image.
 956          */
 957         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 958
 959         /* We reprogram keys and shouldn't allocate new key indices */
 960         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 961
 962         mvm->ptk_ivlen = 0;
 963         mvm->ptk_icvlen = 0;
 964         mvm->ptk_ivlen = 0;
 965         mvm->ptk_icvlen = 0;
 966
 967         /*
 968          * The D3 firmware still hardcodes the AP station ID for the
 969          * BSS we're associated with as 0. As a result, we have to move
 970          * the auxiliary station to ID 1 so the ID 0 remains free for
 971          * the AP station for later.
 972          * We set the sta_id to 1 here, and reset it to its previous
 973          * value (that we stored above) later.
 974          */
 975         mvm->aux_sta.sta_id = 1;
 976
 977         ret = iwl_mvm_load_d3_fw(mvm);
 978         if (ret)
 979                 goto out;
 980
 981         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 982         if (ret)
 983                 goto out;
 984
 985         if (!iwlwifi_mod_params.sw_crypto) {
 986                 /*
 987                  * This needs to be unlocked due to lock ordering
 988                  * constraints. Since we're in the suspend path
 989                  * that isn't really a problem though.
 990                  */
 991                 mutex_unlock(&mvm->mutex);
 992                 ieee80211_iter_keys(mvm->hw, vif,
 993                                     iwl_mvm_wowlan_program_keys,
 994                                     &key_data);
 995                 mutex_lock(&mvm->mutex);
 996                 if (key_data.error) {
 997                         ret = -EIO;
 998                         goto out;
 999                 }
1000
1001                 if (key_data.use_rsc_tsc) {
1002                         struct iwl_host_cmd rsc_tsc_cmd = {
1003                                 .id = WOWLAN_TSC_RSC_PARAM,
1004                                 .flags = CMD_SYNC,
1005                                 .data[0] = key_data.rsc_tsc,
1006                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1007                                 .len[0] = sizeof(*key_data.rsc_tsc),
1008                         };
1009
1010                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
1011                         if (ret)
1012                                 goto out;
1013                 }
1014
1015                 if (key_data.use_tkip) {
1016                         ret = iwl_mvm_send_cmd_pdu(mvm,
1017                                                    WOWLAN_TKIP_PARAM,
1018                                                    CMD_SYNC, sizeof(tkip_cmd),
1019                                                    &tkip_cmd);
1020                         if (ret)
1021                                 goto out;
1022                 }
1023
1024                 if (mvmvif->rekey_data.valid) {
1025                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1026                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
1027                                NL80211_KCK_LEN);
1028                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1029                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1030                                NL80211_KEK_LEN);
1031                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1032                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1033
1034                         ret = iwl_mvm_send_cmd_pdu(mvm,
1035                                                    WOWLAN_KEK_KCK_MATERIAL,
1036                                                    CMD_SYNC,
1037                                                    sizeof(kek_kck_cmd),
1038                                                    &kek_kck_cmd);
1039                         if (ret)
1040                                 goto out;
1041                 }
1042         }
1043
1044         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
1045                                    CMD_SYNC, sizeof(wowlan_config_cmd),
1046                                    &wowlan_config_cmd);
1047         if (ret)
1048                 goto out;
1049
1050         ret = iwl_mvm_send_patterns(mvm, wowlan);
1051         if (ret)
1052                 goto out;
1053
1054         ret = iwl_mvm_send_proto_offload(mvm, vif);
1055         if (ret)
1056                 goto out;
1057
1058         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1059         if (ret)
1060                 goto out;
1061
1062         ret = iwl_mvm_power_update_mode(mvm, vif);
1063         if (ret)
1064                 goto out;
1065
1066 #ifdef CONFIG_IWLWIFI_DEBUGFS
1067         if (mvm->d3_wake_sysassert)
1068                 d3_cfg_cmd_data.wakeup_flags |=
1069                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1070 #endif
1071
1072         /* must be last -- this switches firmware state */
1073         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1074         if (ret)
1075                 goto out;
1076 #ifdef CONFIG_IWLWIFI_DEBUGFS
1077         len = le32_to_cpu(d3_cfg_cmd.resp_pkt->len_n_flags) &
1078                 FH_RSCSR_FRAME_SIZE_MSK;
1079         if (len >= sizeof(u32) * 2) {
1080                 mvm->d3_test_pme_ptr =
1081                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1082         } else if (test) {
1083                 /* in test mode we require the pointer */
1084                 ret = -EIO;
1085                 goto out;
1086         }
1087 #endif
1088         iwl_free_resp(&d3_cfg_cmd);
1089
1090         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1091
1092         iwl_trans_d3_suspend(mvm->trans, test);
1093  out:
1094         mvm->aux_sta.sta_id = old_aux_sta_id;
1095         mvm_ap_sta->sta_id = old_ap_sta_id;
1096         mvmvif->ap_sta_id = old_ap_sta_id;
1097  out_noreset:
1098         kfree(key_data.rsc_tsc);
1099         if (ret < 0)
1100                 ieee80211_restart_hw(mvm->hw);
1101
1102         mutex_unlock(&mvm->mutex);
1103
1104         return ret;
1105 }
1106
1107 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1108 {
1109         return __iwl_mvm_suspend(hw, wowlan, false);
1110 }
1111
1112 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1113                                           struct ieee80211_vif *vif,
1114                                           struct iwl_wowlan_status *status)
1115 {
1116         struct sk_buff *pkt = NULL;
1117         struct cfg80211_wowlan_wakeup wakeup = {
1118                 .pattern_idx = -1,
1119         };
1120         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1121         u32 reasons = le32_to_cpu(status->wakeup_reasons);
1122
1123         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1124                 wakeup_report = NULL;
1125                 goto report;
1126         }
1127
1128         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1129                 wakeup.magic_pkt = true;
1130
1131         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1132                 wakeup.pattern_idx =
1133                         le16_to_cpu(status->pattern_number);
1134
1135         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1136                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1137                 wakeup.disconnect = true;
1138
1139         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1140                 wakeup.gtk_rekey_failure = true;
1141
1142         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1143                 wakeup.rfkill_release = true;
1144
1145         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1146                 wakeup.eap_identity_req = true;
1147
1148         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1149                 wakeup.four_way_handshake = true;
1150
1151         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1152                 wakeup.tcp_connlost = true;
1153
1154         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1155                 wakeup.tcp_nomoretokens = true;
1156
1157         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1158                 wakeup.tcp_match = true;
1159
1160         if (status->wake_packet_bufsize) {
1161                 int pktsize = le32_to_cpu(status->wake_packet_bufsize);
1162                 int pktlen = le32_to_cpu(status->wake_packet_length);
1163                 const u8 *pktdata = status->wake_packet;
1164                 struct ieee80211_hdr *hdr = (void *)pktdata;
1165                 int truncated = pktlen - pktsize;
1166
1167                 /* this would be a firmware bug */
1168                 if (WARN_ON_ONCE(truncated < 0))
1169                         truncated = 0;
1170
1171                 if (ieee80211_is_data(hdr->frame_control)) {
1172                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1173                         int ivlen = 0, icvlen = 4; /* also FCS */
1174
1175                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1176                         if (!pkt)
1177                                 goto report;
1178
1179                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1180                         pktdata += hdrlen;
1181                         pktsize -= hdrlen;
1182
1183                         if (ieee80211_has_protected(hdr->frame_control)) {
1184                                 /*
1185                                  * This is unlocked and using gtk_i(c)vlen,
1186                                  * but since everything is under RTNL still
1187                                  * that's not really a problem - changing
1188                                  * it would be difficult.
1189                                  */
1190                                 if (is_multicast_ether_addr(hdr->addr1)) {
1191                                         ivlen = mvm->gtk_ivlen;
1192                                         icvlen += mvm->gtk_icvlen;
1193                                 } else {
1194                                         ivlen = mvm->ptk_ivlen;
1195                                         icvlen += mvm->ptk_icvlen;
1196                                 }
1197                         }
1198
1199                         /* if truncated, FCS/ICV is (partially) gone */
1200                         if (truncated >= icvlen) {
1201                                 icvlen = 0;
1202                                 truncated -= icvlen;
1203                         } else {
1204                                 icvlen -= truncated;
1205                                 truncated = 0;
1206                         }
1207
1208                         pktsize -= ivlen + icvlen;
1209                         pktdata += ivlen;
1210
1211                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1212
1213                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1214                                 goto report;
1215                         wakeup.packet = pkt->data;
1216                         wakeup.packet_present_len = pkt->len;
1217                         wakeup.packet_len = pkt->len - truncated;
1218                         wakeup.packet_80211 = false;
1219                 } else {
1220                         int fcslen = 4;
1221
1222                         if (truncated >= 4) {
1223                                 truncated -= 4;
1224                                 fcslen = 0;
1225                         } else {
1226                                 fcslen -= truncated;
1227                                 truncated = 0;
1228                         }
1229                         pktsize -= fcslen;
1230                         wakeup.packet = status->wake_packet;
1231                         wakeup.packet_present_len = pktsize;
1232                         wakeup.packet_len = pktlen - truncated;
1233                         wakeup.packet_80211 = true;
1234                 }
1235         }
1236
1237  report:
1238         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1239         kfree_skb(pkt);
1240 }
1241
1242 /* releases the MVM mutex */
1243 static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1244                                          struct ieee80211_vif *vif)
1245 {
1246         u32 base = mvm->error_event_table;
1247         struct error_table_start {
1248                 /* cf. struct iwl_error_event_table */
1249                 u32 valid;
1250                 u32 error_id;
1251         } err_info;
1252         struct iwl_host_cmd cmd = {
1253                 .id = WOWLAN_GET_STATUSES,
1254                 .flags = CMD_SYNC | CMD_WANT_SKB,
1255         };
1256         struct iwl_wowlan_status *status;
1257         int ret, len;
1258
1259         iwl_trans_read_mem_bytes(mvm->trans, base,
1260                                  &err_info, sizeof(err_info));
1261
1262         if (err_info.valid) {
1263                 IWL_INFO(mvm, "error table is valid (%d)\n",
1264                          err_info.valid);
1265                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1266                         struct cfg80211_wowlan_wakeup wakeup = {
1267                                 .rfkill_release = true,
1268                         };
1269                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1270                                                        GFP_KERNEL);
1271                 }
1272                 goto out_unlock;
1273         }
1274
1275         /* only for tracing for now */
1276         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
1277         if (ret)
1278                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1279
1280         ret = iwl_mvm_send_cmd(mvm, &cmd);
1281         if (ret) {
1282                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1283                 goto out_unlock;
1284         }
1285
1286         /* RF-kill already asserted again... */
1287         if (!cmd.resp_pkt)
1288                 goto out_unlock;
1289
1290         len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1291         if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
1292                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1293                 goto out_free_resp;
1294         }
1295
1296         status = (void *)cmd.resp_pkt->data;
1297
1298         if (len - sizeof(struct iwl_cmd_header) !=
1299             sizeof(*status) +
1300             ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
1301                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1302                 goto out_free_resp;
1303         }
1304
1305         /* now we have all the data we need, unlock to avoid mac80211 issues */
1306         mutex_unlock(&mvm->mutex);
1307
1308         iwl_mvm_report_wakeup_reasons(mvm, vif, status);
1309         iwl_free_resp(&cmd);
1310         return;
1311
1312  out_free_resp:
1313         iwl_free_resp(&cmd);
1314  out_unlock:
1315         mutex_unlock(&mvm->mutex);
1316 }
1317
1318 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1319 {
1320 #ifdef CONFIG_IWLWIFI_DEBUGFS
1321         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1322         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1323         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1324
1325         if (!mvm->store_d3_resume_sram)
1326                 return;
1327
1328         if (!mvm->d3_resume_sram) {
1329                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1330                 if (!mvm->d3_resume_sram)
1331                         return;
1332         }
1333
1334         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1335 #endif
1336 }
1337
1338 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1339 {
1340         struct iwl_d3_iter_data resume_iter_data = {
1341                 .mvm = mvm,
1342         };
1343         struct ieee80211_vif *vif = NULL;
1344         int ret;
1345         enum iwl_d3_status d3_status;
1346
1347         mutex_lock(&mvm->mutex);
1348
1349         /* get the BSS vif pointer again */
1350         ieee80211_iterate_active_interfaces_atomic(
1351                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1352                 iwl_mvm_d3_iface_iterator, &resume_iter_data);
1353
1354         if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
1355                 goto out_unlock;
1356
1357         vif = resume_iter_data.vif;
1358
1359         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1360         if (ret)
1361                 goto out_unlock;
1362
1363         if (d3_status != IWL_D3_STATUS_ALIVE) {
1364                 IWL_INFO(mvm, "Device was reset during suspend\n");
1365                 goto out_unlock;
1366         }
1367
1368         /* query SRAM first in case we want event logging */
1369         iwl_mvm_read_d3_sram(mvm);
1370
1371         iwl_mvm_query_wakeup_reasons(mvm, vif);
1372         /* has unlocked the mutex, so skip that */
1373         goto out;
1374
1375  out_unlock:
1376         mutex_unlock(&mvm->mutex);
1377
1378  out:
1379         if (!test && vif)
1380                 ieee80211_resume_disconnect(vif);
1381
1382         /* return 1 to reconfigure the device */
1383         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1384         return 1;
1385 }
1386
1387 int iwl_mvm_resume(struct ieee80211_hw *hw)
1388 {
1389         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1390
1391         return __iwl_mvm_resume(mvm, false);
1392 }
1393
1394 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1395 {
1396         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1397
1398         device_set_wakeup_enable(mvm->trans->dev, enabled);
1399 }
1400
1401 #ifdef CONFIG_IWLWIFI_DEBUGFS
1402 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1403 {
1404         struct iwl_mvm *mvm = inode->i_private;
1405         int err;
1406
1407         if (mvm->d3_test_active)
1408                 return -EBUSY;
1409
1410         file->private_data = inode->i_private;
1411
1412         ieee80211_stop_queues(mvm->hw);
1413         synchronize_net();
1414
1415         /* start pseudo D3 */
1416         rtnl_lock();
1417         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1418         rtnl_unlock();
1419         if (err > 0)
1420                 err = -EINVAL;
1421         if (err) {
1422                 ieee80211_wake_queues(mvm->hw);
1423                 return err;
1424         }
1425         mvm->d3_test_active = true;
1426         return 0;
1427 }
1428
1429 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1430                                     size_t count, loff_t *ppos)
1431 {
1432         struct iwl_mvm *mvm = file->private_data;
1433         u32 pme_asserted;
1434
1435         while (true) {
1436                 pme_asserted = iwl_trans_read_mem32(mvm->trans,
1437                                                     mvm->d3_test_pme_ptr);
1438                 if (pme_asserted)
1439                         break;
1440                 if (msleep_interruptible(100))
1441                         break;
1442         }
1443
1444         return 0;
1445 }
1446
1447 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1448                                               struct ieee80211_vif *vif)
1449 {
1450         if (vif->type == NL80211_IFTYPE_STATION)
1451                 ieee80211_connection_loss(vif);
1452 }
1453
1454 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1455 {
1456         struct iwl_mvm *mvm = inode->i_private;
1457         int remaining_time = 10;
1458
1459         mvm->d3_test_active = false;
1460         __iwl_mvm_resume(mvm, true);
1461         iwl_abort_notification_waits(&mvm->notif_wait);
1462         ieee80211_restart_hw(mvm->hw);
1463
1464         /* wait for restart and disconnect all interfaces */
1465         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1466                remaining_time > 0) {
1467                 remaining_time--;
1468                 msleep(1000);
1469         }
1470
1471         if (remaining_time == 0)
1472                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1473
1474         ieee80211_iterate_active_interfaces_atomic(
1475                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1476                 iwl_mvm_d3_test_disconn_work_iter, NULL);
1477
1478         ieee80211_wake_queues(mvm->hw);
1479
1480         return 0;
1481 }
1482
1483 const struct file_operations iwl_dbgfs_d3_test_ops = {
1484         .llseek = no_llseek,
1485         .open = iwl_mvm_d3_test_open,
1486         .read = iwl_mvm_d3_test_read,
1487         .release = iwl_mvm_d3_test_release,
1488 };
1489 #endif