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.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  *
  40  *  * Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  *  * Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
  46  *  * Neither the name Intel Corporation nor the names of its
  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)
 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 gtk_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->gtk_key_idx++;
 192                         wkc.wep_key.key_offset = data->gtk_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                 data->gtk_key_idx++;
 320                 key->hw_key_idx = data->gtk_key_idx;
 321                 mvm->gtk_ivlen = key->iv_len;
 322                 mvm->gtk_icvlen = key->icv_len;
 323         }
 324
 325         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 326         data->error = ret != 0;
 327 out_unlock:
 328         mutex_unlock(&mvm->mutex);
 329 }
 330
 331 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 332                                  struct cfg80211_wowlan *wowlan)
 333 {
 334         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 335         struct iwl_host_cmd cmd = {
 336                 .id = WOWLAN_PATTERNS,
 337                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 338                 .flags = CMD_SYNC,
 339         };
 340         int i, err;
 341
 342         if (!wowlan->n_patterns)
 343                 return 0;
 344
 345         cmd.len[0] = sizeof(*pattern_cmd) +
 346                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 347
 348         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 349         if (!pattern_cmd)
 350                 return -ENOMEM;
 351
 352         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 353
 354         for (i = 0; i < wowlan->n_patterns; i++) {
 355                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 356
 357                 memcpy(&pattern_cmd->patterns[i].mask,
 358                        wowlan->patterns[i].mask, mask_len);
 359                 memcpy(&pattern_cmd->patterns[i].pattern,
 360                        wowlan->patterns[i].pattern,
 361                        wowlan->patterns[i].pattern_len);
 362                 pattern_cmd->patterns[i].mask_size = mask_len;
 363                 pattern_cmd->patterns[i].pattern_size =
 364                         wowlan->patterns[i].pattern_len;
 365         }
 366
 367         cmd.data[0] = pattern_cmd;
 368         err = iwl_mvm_send_cmd(mvm, &cmd);
 369         kfree(pattern_cmd);
 370         return err;
 371 }
 372
 373 static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
 374                                       struct ieee80211_vif *vif)
 375 {
 376         struct iwl_proto_offload_cmd cmd = {};
 377 #if IS_ENABLED(CONFIG_IPV6)
 378         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 379         int i;
 380
 381         if (mvmvif->num_target_ipv6_addrs) {
 382                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_NS);
 383                 memcpy(cmd.ndp_mac_addr, vif->addr, ETH_ALEN);
 384         }
 385
 386         BUILD_BUG_ON(sizeof(cmd.target_ipv6_addr[i]) !=
 387                      sizeof(mvmvif->target_ipv6_addrs[i]));
 388
 389         for (i = 0; i < mvmvif->num_target_ipv6_addrs; i++)
 390                 memcpy(cmd.target_ipv6_addr[i],
 391                        &mvmvif->target_ipv6_addrs[i],
 392                        sizeof(cmd.target_ipv6_addr[i]));
 393 #endif
 394
 395         if (vif->bss_conf.arp_addr_cnt) {
 396                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_ARP);
 397                 cmd.host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
 398                 memcpy(cmd.arp_mac_addr, vif->addr, ETH_ALEN);
 399         }
 400
 401         if (!cmd.enabled)
 402                 return 0;
 403
 404         return iwl_mvm_send_cmd_pdu(mvm, PROT_OFFLOAD_CONFIG_CMD, CMD_SYNC,
 405                                     sizeof(cmd), &cmd);
 406 }
 407
 408 enum iwl_mvm_tcp_packet_type {
 409         MVM_TCP_TX_SYN,
 410         MVM_TCP_RX_SYNACK,
 411         MVM_TCP_TX_DATA,
 412         MVM_TCP_RX_ACK,
 413         MVM_TCP_RX_WAKE,
 414         MVM_TCP_TX_FIN,
 415 };
 416
 417 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 418 {
 419         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 420         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 421 }
 422
 423 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
 424                                      struct cfg80211_wowlan_tcp *tcp,
 425                                      void *_pkt, u8 *mask,
 426                                      __le16 *pseudo_hdr_csum,
 427                                      enum iwl_mvm_tcp_packet_type ptype)
 428 {
 429         struct {
 430                 struct ethhdr eth;
 431                 struct iphdr ip;
 432                 struct tcphdr tcp;
 433                 u8 data[];
 434         } __packed *pkt = _pkt;
 435         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 436         int i;
 437
 438         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 439         pkt->ip.version = 4;
 440         pkt->ip.ihl = 5;
 441         pkt->ip.protocol = IPPROTO_TCP;
 442
 443         switch (ptype) {
 444         case MVM_TCP_TX_SYN:
 445         case MVM_TCP_TX_DATA:
 446         case MVM_TCP_TX_FIN:
 447                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 448                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 449                 pkt->ip.ttl = 128;
 450                 pkt->ip.saddr = tcp->src;
 451                 pkt->ip.daddr = tcp->dst;
 452                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 453                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 454                 /* overwritten for TX SYN later */
 455                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 456                 pkt->tcp.window = cpu_to_be16(65000);
 457                 break;
 458         case MVM_TCP_RX_SYNACK:
 459         case MVM_TCP_RX_ACK:
 460         case MVM_TCP_RX_WAKE:
 461                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 462                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 463                 pkt->ip.saddr = tcp->dst;
 464                 pkt->ip.daddr = tcp->src;
 465                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 466                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 467                 break;
 468         default:
 469                 WARN_ON(1);
 470                 return;
 471         }
 472
 473         switch (ptype) {
 474         case MVM_TCP_TX_SYN:
 475                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 476                 memset(pkt->data, 0x01, 8);
 477                 ip_tot_len += 8;
 478                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 479                 pkt->tcp.syn = 1;
 480                 break;
 481         case MVM_TCP_TX_DATA:
 482                 ip_tot_len += tcp->payload_len;
 483                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 484                 pkt->tcp.psh = 1;
 485                 pkt->tcp.ack = 1;
 486                 break;
 487         case MVM_TCP_TX_FIN:
 488                 pkt->tcp.fin = 1;
 489                 pkt->tcp.ack = 1;
 490                 break;
 491         case MVM_TCP_RX_SYNACK:
 492                 pkt->tcp.syn = 1;
 493                 pkt->tcp.ack = 1;
 494                 break;
 495         case MVM_TCP_RX_ACK:
 496                 pkt->tcp.ack = 1;
 497                 break;
 498         case MVM_TCP_RX_WAKE:
 499                 ip_tot_len += tcp->wake_len;
 500                 pkt->tcp.psh = 1;
 501                 pkt->tcp.ack = 1;
 502                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 503                 break;
 504         }
 505
 506         switch (ptype) {
 507         case MVM_TCP_TX_SYN:
 508         case MVM_TCP_TX_DATA:
 509         case MVM_TCP_TX_FIN:
 510                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 511                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 512                 break;
 513         case MVM_TCP_RX_WAKE:
 514                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 515                         u8 tmp = tcp->wake_mask[i];
 516                         mask[i + 6] |= tmp << 6;
 517                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 518                                 mask[i + 7] = tmp >> 2;
 519                 }
 520                 /* fall through for ethernet/IP/TCP headers mask */
 521         case MVM_TCP_RX_SYNACK:
 522         case MVM_TCP_RX_ACK:
 523                 mask[0] = 0xff; /* match ethernet */
 524                 /*
 525                  * match ethernet, ip.version, ip.ihl
 526                  * the ip.ihl half byte is really masked out by firmware
 527                  */
 528                 mask[1] = 0x7f;
 529                 mask[2] = 0x80; /* match ip.protocol */
 530                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 531                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 532                 mask[5] = 0x80; /* match tcp flags */
 533                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 534                 break;
 535         };
 536
 537         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 538                                             pkt->ip.saddr, pkt->ip.daddr);
 539 }
 540
 541 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 542                                         struct ieee80211_vif *vif,
 543                                         struct cfg80211_wowlan_tcp *tcp)
 544 {
 545         struct iwl_wowlan_remote_wake_config *cfg;
 546         struct iwl_host_cmd cmd = {
 547                 .id = REMOTE_WAKE_CONFIG_CMD,
 548                 .len = { sizeof(*cfg), },
 549                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 550                 .flags = CMD_SYNC,
 551         };
 552         int ret;
 553
 554         if (!tcp)
 555                 return 0;
 556
 557         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 558         if (!cfg)
 559                 return -ENOMEM;
 560         cmd.data[0] = cfg;
 561
 562         cfg->max_syn_retries = 10;
 563         cfg->max_data_retries = 10;
 564         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 565         cfg->tcp_ack_timeout = 1; /* seconds */
 566
 567         /* SYN (TX) */
 568         iwl_mvm_build_tcp_packet(
 569                 vif, tcp, cfg->syn_tx.data, NULL,
 570                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 571                 MVM_TCP_TX_SYN);
 572         cfg->syn_tx.info.tcp_payload_length = 0;
 573
 574         /* SYN/ACK (RX) */
 575         iwl_mvm_build_tcp_packet(
 576                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 577                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 578                 MVM_TCP_RX_SYNACK);
 579         cfg->synack_rx.info.tcp_payload_length = 0;
 580
 581         /* KEEPALIVE/ACK (TX) */
 582         iwl_mvm_build_tcp_packet(
 583                 vif, tcp, cfg->keepalive_tx.data, NULL,
 584                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 585                 MVM_TCP_TX_DATA);
 586         cfg->keepalive_tx.info.tcp_payload_length =
 587                 cpu_to_le16(tcp->payload_len);
 588         cfg->sequence_number_offset = tcp->payload_seq.offset;
 589         /* length must be 0..4, the field is little endian */
 590         cfg->sequence_number_length = tcp->payload_seq.len;
 591         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 592         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 593         if (tcp->payload_tok.len) {
 594                 cfg->token_offset = tcp->payload_tok.offset;
 595                 cfg->token_length = tcp->payload_tok.len;
 596                 cfg->num_tokens =
 597                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 598                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 599                        tcp->tokens_size);
 600         } else {
 601                 /* set tokens to max value to almost never run out */
 602                 cfg->num_tokens = cpu_to_le16(65535);
 603         }
 604
 605         /* ACK (RX) */
 606         iwl_mvm_build_tcp_packet(
 607                 vif, tcp, cfg->keepalive_ack_rx.data,
 608                 cfg->keepalive_ack_rx.rx_mask,
 609                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 610                 MVM_TCP_RX_ACK);
 611         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 612
 613         /* WAKEUP (RX) */
 614         iwl_mvm_build_tcp_packet(
 615                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 616                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 617                 MVM_TCP_RX_WAKE);
 618         cfg->wake_rx.info.tcp_payload_length =
 619                 cpu_to_le16(tcp->wake_len);
 620
 621         /* FIN */
 622         iwl_mvm_build_tcp_packet(
 623                 vif, tcp, cfg->fin_tx.data, NULL,
 624                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 625                 MVM_TCP_TX_FIN);
 626         cfg->fin_tx.info.tcp_payload_length = 0;
 627
 628         ret = iwl_mvm_send_cmd(mvm, &cmd);
 629         kfree(cfg);
 630
 631         return ret;
 632 }
 633
 634 struct iwl_d3_iter_data {
 635         struct iwl_mvm *mvm;
 636         struct ieee80211_vif *vif;
 637         bool error;
 638 };
 639
 640 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
 641                                       struct ieee80211_vif *vif)
 642 {
 643         struct iwl_d3_iter_data *data = _data;
 644         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 645
 646         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 647                 return;
 648
 649         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 650                 return;
 651
 652         if (data->vif) {
 653                 IWL_ERR(data->mvm, "More than one managed interface active!\n");
 654                 data->error = true;
 655                 return;
 656         }
 657
 658         data->vif = vif;
 659 }
 660
 661 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 662                                 struct ieee80211_sta *ap_sta)
 663 {
 664         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 665         struct ieee80211_chanctx_conf *ctx;
 666         u8 chains_static, chains_dynamic;
 667         struct cfg80211_chan_def chandef;
 668         int ret, i;
 669         struct iwl_binding_cmd binding_cmd = {};
 670         struct iwl_time_quota_cmd quota_cmd = {};
 671         u32 status;
 672
 673         /* add back the PHY */
 674         if (WARN_ON(!mvmvif->phy_ctxt))
 675                 return -EINVAL;
 676
 677         rcu_read_lock();
 678         ctx = rcu_dereference(vif->chanctx_conf);
 679         if (WARN_ON(!ctx)) {
 680                 rcu_read_unlock();
 681                 return -EINVAL;
 682         }
 683         chandef = ctx->def;
 684         chains_static = ctx->rx_chains_static;
 685         chains_dynamic = ctx->rx_chains_dynamic;
 686         rcu_read_unlock();
 687
 688         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 689                                    chains_static, chains_dynamic);
 690         if (ret)
 691                 return ret;
 692
 693         /* add back the MAC */
 694         mvmvif->uploaded = false;
 695
 696         if (WARN_ON(!vif->bss_conf.assoc))
 697                 return -EINVAL;
 698         /* hack */
 699         vif->bss_conf.assoc = false;
 700         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 701         vif->bss_conf.assoc = true;
 702         if (ret)
 703                 return ret;
 704
 705         /* add back binding - XXX refactor? */
 706         binding_cmd.id_and_color =
 707                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 708                                                 mvmvif->phy_ctxt->color));
 709         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 710         binding_cmd.phy =
 711                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 712                                                 mvmvif->phy_ctxt->color));
 713         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 714                                                               mvmvif->color));
 715         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 716                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 717
 718         status = 0;
 719         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 720                                           sizeof(binding_cmd), &binding_cmd,
 721                                           &status);
 722         if (ret) {
 723                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 724                 return ret;
 725         }
 726
 727         if (status) {
 728                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 729                 return -EIO;
 730         }
 731
 732         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 733         if (ret)
 734                 return ret;
 735         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 736
 737         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 738         if (ret)
 739                 return ret;
 740
 741         /* and some quota */
 742         quota_cmd.quotas[0].id_and_color =
 743                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 744                                                 mvmvif->phy_ctxt->color));
 745         quota_cmd.quotas[0].quota = cpu_to_le32(100);
 746         quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
 747
 748         for (i = 1; i < MAX_BINDINGS; i++)
 749                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 750
 751         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 752                                    sizeof(quota_cmd), &quota_cmd);
 753         if (ret)
 754                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 755
 756         return 0;
 757 }
 758
 759 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 760                              struct cfg80211_wowlan *wowlan,
 761                              bool test)
 762 {
 763         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 764         struct iwl_d3_iter_data suspend_iter_data = {
 765                 .mvm = mvm,
 766         };
 767         struct ieee80211_vif *vif;
 768         struct iwl_mvm_vif *mvmvif;
 769         struct ieee80211_sta *ap_sta;
 770         struct iwl_mvm_sta *mvm_ap_sta;
 771         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 772         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 773         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 774         struct iwl_d3_manager_config d3_cfg_cmd_data = {
 775                 /*
 776                  * Program the minimum sleep time to 10 seconds, as many
 777                  * platforms have issues processing a wakeup signal while
 778                  * still being in the process of suspending.
 779                  */
 780                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
 781         };
 782         struct iwl_host_cmd d3_cfg_cmd = {
 783                 .id = D3_CONFIG_CMD,
 784                 .flags = CMD_SYNC | CMD_WANT_SKB,
 785                 .data[0] = &d3_cfg_cmd_data,
 786                 .len[0] = sizeof(d3_cfg_cmd_data),
 787         };
 788         struct wowlan_key_data key_data = {
 789                 .use_rsc_tsc = false,
 790                 .tkip = &tkip_cmd,
 791                 .use_tkip = false,
 792         };
 793         int ret, i;
 794         int len __maybe_unused;
 795         u16 seq;
 796         u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
 797
 798         if (!wowlan) {
 799                 /*
 800                  * mac80211 shouldn't get here, but for D3 test
 801                  * it doesn't warrant a warning
 802                  */
 803                 WARN_ON(!test);
 804                 return -EINVAL;
 805         }
 806
 807         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 808         if (!key_data.rsc_tsc)
 809                 return -ENOMEM;
 810
 811         mutex_lock(&mvm->mutex);
 812
 813         old_aux_sta_id = mvm->aux_sta.sta_id;
 814
 815         /* see if there's only a single BSS vif and it's associated */
 816         ieee80211_iterate_active_interfaces_atomic(
 817                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 818                 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
 819
 820         if (suspend_iter_data.error || !suspend_iter_data.vif) {
 821                 ret = 1;
 822                 goto out_noreset;
 823         }
 824
 825         vif = suspend_iter_data.vif;
 826         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 827
 828         ap_sta = rcu_dereference_protected(
 829                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 830                         lockdep_is_held(&mvm->mutex));
 831         if (IS_ERR_OR_NULL(ap_sta)) {
 832                 ret = -EINVAL;
 833                 goto out_noreset;
 834         }
 835
 836         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 837
 838         /*
 839          * The D3 firmware still hardcodes the AP station ID for the
 840          * BSS we're associated with as 0. Store the real STA ID here
 841          * and assign 0. When we leave this function, we'll restore
 842          * the original value for the resume code.
 843          */
 844         old_ap_sta_id = mvm_ap_sta->sta_id;
 845         mvm_ap_sta->sta_id = 0;
 846         mvmvif->ap_sta_id = 0;
 847
 848         /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
 849
 850         wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
 851
 852         /*
 853          * We know the last used seqno, and the uCode expects to know that
 854          * one, it will increment before TX.
 855          */
 856         seq = mvm_ap_sta->last_seq_ctl & IEEE80211_SCTL_SEQ;
 857         wowlan_config_cmd.non_qos_seq = cpu_to_le16(seq);
 858
 859         /*
 860          * For QoS counters, we store the one to use next, so subtract 0x10
 861          * since the uCode will add 0x10 *before* using the value while we
 862          * increment after using the value (i.e. store the next value to use).
 863          */
 864         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 865                 seq = mvm_ap_sta->tid_data[i].seq_number;
 866                 seq -= 0x10;
 867                 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
 868         }
 869
 870         if (wowlan->disconnect)
 871                 wowlan_config_cmd.wakeup_filter |=
 872                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 873                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 874         if (wowlan->magic_pkt)
 875                 wowlan_config_cmd.wakeup_filter |=
 876                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 877         if (wowlan->gtk_rekey_failure)
 878                 wowlan_config_cmd.wakeup_filter |=
 879                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 880         if (wowlan->eap_identity_req)
 881                 wowlan_config_cmd.wakeup_filter |=
 882                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 883         if (wowlan->four_way_handshake)
 884                 wowlan_config_cmd.wakeup_filter |=
 885                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 886         if (wowlan->n_patterns)
 887                 wowlan_config_cmd.wakeup_filter |=
 888                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 889
 890         if (wowlan->rfkill_release)
 891                 wowlan_config_cmd.wakeup_filter |=
 892                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 893
 894         if (wowlan->tcp) {
 895                 /*
 896                  * Set the "link change" (really "link lost") flag as well
 897                  * since that implies losing the TCP connection.
 898                  */
 899                 wowlan_config_cmd.wakeup_filter |=
 900                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 901                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 902                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 903                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 904         }
 905
 906         iwl_mvm_cancel_scan(mvm);
 907
 908         iwl_trans_stop_device(mvm->trans);
 909
 910         /*
 911          * Set the HW restart bit -- this is mostly true as we're
 912          * going to load new firmware and reprogram that, though
 913          * the reprogramming is going to be manual to avoid adding
 914          * all the MACs that aren't support.
 915          * We don't have to clear up everything though because the
 916          * reprogramming is manual. When we resume, we'll actually
 917          * go through a proper restart sequence again to switch
 918          * back to the runtime firmware image.
 919          */
 920         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 921
 922         /* We reprogram keys and shouldn't allocate new key indices */
 923         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 924
 925         mvm->ptk_ivlen = 0;
 926         mvm->ptk_icvlen = 0;
 927         mvm->ptk_ivlen = 0;
 928         mvm->ptk_icvlen = 0;
 929
 930         /*
 931          * The D3 firmware still hardcodes the AP station ID for the
 932          * BSS we're associated with as 0. As a result, we have to move
 933          * the auxiliary station to ID 1 so the ID 0 remains free for
 934          * the AP station for later.
 935          * We set the sta_id to 1 here, and reset it to its previous
 936          * value (that we stored above) later.
 937          */
 938         mvm->aux_sta.sta_id = 1;
 939
 940         ret = iwl_mvm_load_d3_fw(mvm);
 941         if (ret)
 942                 goto out;
 943
 944         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 945         if (ret)
 946                 goto out;
 947
 948         if (!iwlwifi_mod_params.sw_crypto) {
 949                 /*
 950                  * This needs to be unlocked due to lock ordering
 951                  * constraints. Since we're in the suspend path
 952                  * that isn't really a problem though.
 953                  */
 954                 mutex_unlock(&mvm->mutex);
 955                 ieee80211_iter_keys(mvm->hw, vif,
 956                                     iwl_mvm_wowlan_program_keys,
 957                                     &key_data);
 958                 mutex_lock(&mvm->mutex);
 959                 if (key_data.error) {
 960                         ret = -EIO;
 961                         goto out;
 962                 }
 963
 964                 if (key_data.use_rsc_tsc) {
 965                         struct iwl_host_cmd rsc_tsc_cmd = {
 966                                 .id = WOWLAN_TSC_RSC_PARAM,
 967                                 .flags = CMD_SYNC,
 968                                 .data[0] = key_data.rsc_tsc,
 969                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 970                                 .len[0] = sizeof(*key_data.rsc_tsc),
 971                         };
 972
 973                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 974                         if (ret)
 975                                 goto out;
 976                 }
 977
 978                 if (key_data.use_tkip) {
 979                         ret = iwl_mvm_send_cmd_pdu(mvm,
 980                                                    WOWLAN_TKIP_PARAM,
 981                                                    CMD_SYNC, sizeof(tkip_cmd),
 982                                                    &tkip_cmd);
 983                         if (ret)
 984                                 goto out;
 985                 }
 986
 987                 if (mvmvif->rekey_data.valid) {
 988                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 989                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 990                                NL80211_KCK_LEN);
 991                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 992                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 993                                NL80211_KEK_LEN);
 994                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 995                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 996
 997                         ret = iwl_mvm_send_cmd_pdu(mvm,
 998                                                    WOWLAN_KEK_KCK_MATERIAL,
 999                                                    CMD_SYNC,
1000                                                    sizeof(kek_kck_cmd),
1001                                                    &kek_kck_cmd);
1002                         if (ret)
1003                                 goto out;
1004                 }
1005         }
1006
1007         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
1008                                    CMD_SYNC, sizeof(wowlan_config_cmd),
1009                                    &wowlan_config_cmd);
1010         if (ret)
1011                 goto out;
1012
1013         ret = iwl_mvm_send_patterns(mvm, wowlan);
1014         if (ret)
1015                 goto out;
1016
1017         ret = iwl_mvm_send_proto_offload(mvm, vif);
1018         if (ret)
1019                 goto out;
1020
1021         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1022         if (ret)
1023                 goto out;
1024
1025         ret = iwl_mvm_power_update_mode(mvm, vif);
1026         if (ret)
1027                 goto out;
1028
1029 #ifdef CONFIG_IWLWIFI_DEBUGFS
1030         if (mvm->d3_wake_sysassert)
1031                 d3_cfg_cmd_data.wakeup_flags |=
1032                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1033 #endif
1034
1035         /* must be last -- this switches firmware state */
1036         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1037         if (ret)
1038                 goto out;
1039 #ifdef CONFIG_IWLWIFI_DEBUGFS
1040         len = le32_to_cpu(d3_cfg_cmd.resp_pkt->len_n_flags) &
1041                 FH_RSCSR_FRAME_SIZE_MSK;
1042         if (len >= sizeof(u32) * 2) {
1043                 mvm->d3_test_pme_ptr =
1044                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1045         } else if (test) {
1046                 /* in test mode we require the pointer */
1047                 ret = -EIO;
1048                 goto out;
1049         }
1050 #endif
1051         iwl_free_resp(&d3_cfg_cmd);
1052
1053         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1054
1055         iwl_trans_d3_suspend(mvm->trans, test);
1056  out:
1057         mvm->aux_sta.sta_id = old_aux_sta_id;
1058         mvm_ap_sta->sta_id = old_ap_sta_id;
1059         mvmvif->ap_sta_id = old_ap_sta_id;
1060  out_noreset:
1061         kfree(key_data.rsc_tsc);
1062         if (ret < 0)
1063                 ieee80211_restart_hw(mvm->hw);
1064
1065         mutex_unlock(&mvm->mutex);
1066
1067         return ret;
1068 }
1069
1070 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1071 {
1072         return __iwl_mvm_suspend(hw, wowlan, false);
1073 }
1074
1075 static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1076                                          struct ieee80211_vif *vif)
1077 {
1078         u32 base = mvm->error_event_table;
1079         struct error_table_start {
1080                 /* cf. struct iwl_error_event_table */
1081                 u32 valid;
1082                 u32 error_id;
1083         } err_info;
1084         struct cfg80211_wowlan_wakeup wakeup = {
1085                 .pattern_idx = -1,
1086         };
1087         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1088         struct iwl_host_cmd cmd = {
1089                 .id = WOWLAN_GET_STATUSES,
1090                 .flags = CMD_SYNC | CMD_WANT_SKB,
1091         };
1092         struct iwl_wowlan_status *status;
1093         u32 reasons;
1094         int ret, len;
1095         struct sk_buff *pkt = NULL;
1096
1097         iwl_trans_read_mem_bytes(mvm->trans, base,
1098                                  &err_info, sizeof(err_info));
1099
1100         if (err_info.valid) {
1101                 IWL_INFO(mvm, "error table is valid (%d)\n",
1102                          err_info.valid);
1103                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1104                         wakeup.rfkill_release = true;
1105                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1106                                                        GFP_KERNEL);
1107                 }
1108                 return;
1109         }
1110
1111         /* only for tracing for now */
1112         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
1113         if (ret)
1114                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1115
1116         ret = iwl_mvm_send_cmd(mvm, &cmd);
1117         if (ret) {
1118                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1119                 return;
1120         }
1121
1122         /* RF-kill already asserted again... */
1123         if (!cmd.resp_pkt)
1124                 return;
1125
1126         len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1127         if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
1128                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1129                 goto out;
1130         }
1131
1132         status = (void *)cmd.resp_pkt->data;
1133
1134         if (len - sizeof(struct iwl_cmd_header) !=
1135             sizeof(*status) +
1136             ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
1137                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1138                 goto out;
1139         }
1140
1141         reasons = le32_to_cpu(status->wakeup_reasons);
1142
1143         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1144                 wakeup_report = NULL;
1145                 goto report;
1146         }
1147
1148         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1149                 wakeup.magic_pkt = true;
1150
1151         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1152                 wakeup.pattern_idx =
1153                         le16_to_cpu(status->pattern_number);
1154
1155         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1156                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1157                 wakeup.disconnect = true;
1158
1159         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1160                 wakeup.gtk_rekey_failure = true;
1161
1162         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1163                 wakeup.rfkill_release = true;
1164
1165         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1166                 wakeup.eap_identity_req = true;
1167
1168         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1169                 wakeup.four_way_handshake = true;
1170
1171         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1172                 wakeup.tcp_connlost = true;
1173
1174         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1175                 wakeup.tcp_nomoretokens = true;
1176
1177         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1178                 wakeup.tcp_match = true;
1179
1180         if (status->wake_packet_bufsize) {
1181                 int pktsize = le32_to_cpu(status->wake_packet_bufsize);
1182                 int pktlen = le32_to_cpu(status->wake_packet_length);
1183                 const u8 *pktdata = status->wake_packet;
1184                 struct ieee80211_hdr *hdr = (void *)pktdata;
1185                 int truncated = pktlen - pktsize;
1186
1187                 /* this would be a firmware bug */
1188                 if (WARN_ON_ONCE(truncated < 0))
1189                         truncated = 0;
1190
1191                 if (ieee80211_is_data(hdr->frame_control)) {
1192                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1193                         int ivlen = 0, icvlen = 4; /* also FCS */
1194
1195                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1196                         if (!pkt)
1197                                 goto report;
1198
1199                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1200                         pktdata += hdrlen;
1201                         pktsize -= hdrlen;
1202
1203                         if (ieee80211_has_protected(hdr->frame_control)) {
1204                                 if (is_multicast_ether_addr(hdr->addr1)) {
1205                                         ivlen = mvm->gtk_ivlen;
1206                                         icvlen += mvm->gtk_icvlen;
1207                                 } else {
1208                                         ivlen = mvm->ptk_ivlen;
1209                                         icvlen += mvm->ptk_icvlen;
1210                                 }
1211                         }
1212
1213                         /* if truncated, FCS/ICV is (partially) gone */
1214                         if (truncated >= icvlen) {
1215                                 icvlen = 0;
1216                                 truncated -= icvlen;
1217                         } else {
1218                                 icvlen -= truncated;
1219                                 truncated = 0;
1220                         }
1221
1222                         pktsize -= ivlen + icvlen;
1223                         pktdata += ivlen;
1224
1225                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1226
1227                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1228                                 goto report;
1229                         wakeup.packet = pkt->data;
1230                         wakeup.packet_present_len = pkt->len;
1231                         wakeup.packet_len = pkt->len - truncated;
1232                         wakeup.packet_80211 = false;
1233                 } else {
1234                         int fcslen = 4;
1235
1236                         if (truncated >= 4) {
1237                                 truncated -= 4;
1238                                 fcslen = 0;
1239                         } else {
1240                                 fcslen -= truncated;
1241                                 truncated = 0;
1242                         }
1243                         pktsize -= fcslen;
1244                         wakeup.packet = status->wake_packet;
1245                         wakeup.packet_present_len = pktsize;
1246                         wakeup.packet_len = pktlen - truncated;
1247                         wakeup.packet_80211 = true;
1248                 }
1249         }
1250
1251  report:
1252         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1253         kfree_skb(pkt);
1254
1255  out:
1256         iwl_free_resp(&cmd);
1257 }
1258
1259 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1260 {
1261 #ifdef CONFIG_IWLWIFI_DEBUGFS
1262         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1263         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1264         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1265
1266         if (!mvm->store_d3_resume_sram)
1267                 return;
1268
1269         if (!mvm->d3_resume_sram) {
1270                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1271                 if (!mvm->d3_resume_sram)
1272                         return;
1273         }
1274
1275         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1276 #endif
1277 }
1278
1279 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1280 {
1281         struct iwl_d3_iter_data resume_iter_data = {
1282                 .mvm = mvm,
1283         };
1284         struct ieee80211_vif *vif = NULL;
1285         int ret;
1286         enum iwl_d3_status d3_status;
1287
1288         mutex_lock(&mvm->mutex);
1289
1290         /* get the BSS vif pointer again */
1291         ieee80211_iterate_active_interfaces_atomic(
1292                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1293                 iwl_mvm_d3_iface_iterator, &resume_iter_data);
1294
1295         if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
1296                 goto out_unlock;
1297
1298         vif = resume_iter_data.vif;
1299
1300         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1301         if (ret)
1302                 goto out_unlock;
1303
1304         if (d3_status != IWL_D3_STATUS_ALIVE) {
1305                 IWL_INFO(mvm, "Device was reset during suspend\n");
1306                 goto out_unlock;
1307         }
1308
1309         /* query SRAM first in case we want event logging */
1310         iwl_mvm_read_d3_sram(mvm);
1311
1312         iwl_mvm_query_wakeup_reasons(mvm, vif);
1313
1314  out_unlock:
1315         mutex_unlock(&mvm->mutex);
1316
1317         if (!test && vif)
1318                 ieee80211_resume_disconnect(vif);
1319
1320         /* return 1 to reconfigure the device */
1321         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1322         return 1;
1323 }
1324
1325 int iwl_mvm_resume(struct ieee80211_hw *hw)
1326 {
1327         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1328
1329         return __iwl_mvm_resume(mvm, false);
1330 }
1331
1332 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1333 {
1334         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1335
1336         device_set_wakeup_enable(mvm->trans->dev, enabled);
1337 }
1338
1339 #ifdef CONFIG_IWLWIFI_DEBUGFS
1340 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1341 {
1342         struct iwl_mvm *mvm = inode->i_private;
1343         int err;
1344
1345         if (mvm->d3_test_active)
1346                 return -EBUSY;
1347
1348         file->private_data = inode->i_private;
1349
1350         ieee80211_stop_queues(mvm->hw);
1351         synchronize_net();
1352
1353         /* start pseudo D3 */
1354         rtnl_lock();
1355         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1356         rtnl_unlock();
1357         if (err > 0)
1358                 err = -EINVAL;
1359         if (err) {
1360                 ieee80211_wake_queues(mvm->hw);
1361                 return err;
1362         }
1363         mvm->d3_test_active = true;
1364         return 0;
1365 }
1366
1367 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1368                                     size_t count, loff_t *ppos)
1369 {
1370         struct iwl_mvm *mvm = file->private_data;
1371         u32 pme_asserted;
1372
1373         while (true) {
1374                 pme_asserted = iwl_trans_read_mem32(mvm->trans,
1375                                                     mvm->d3_test_pme_ptr);
1376                 if (pme_asserted)
1377                         break;
1378                 if (msleep_interruptible(100))
1379                         break;
1380         }
1381
1382         return 0;
1383 }
1384
1385 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1386                                               struct ieee80211_vif *vif)
1387 {
1388         if (vif->type == NL80211_IFTYPE_STATION)
1389                 ieee80211_connection_loss(vif);
1390 }
1391
1392 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1393 {
1394         struct iwl_mvm *mvm = inode->i_private;
1395         int remaining_time = 10;
1396
1397         mvm->d3_test_active = false;
1398         __iwl_mvm_resume(mvm, true);
1399         iwl_abort_notification_waits(&mvm->notif_wait);
1400         ieee80211_restart_hw(mvm->hw);
1401
1402         /* wait for restart and disconnect all interfaces */
1403         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1404                remaining_time > 0) {
1405                 remaining_time--;
1406                 msleep(1000);
1407         }
1408
1409         if (remaining_time == 0)
1410                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1411
1412         ieee80211_iterate_active_interfaces_atomic(
1413                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1414                 iwl_mvm_d3_test_disconn_work_iter, NULL);
1415
1416         ieee80211_wake_queues(mvm->hw);
1417
1418         return 0;
1419 }
1420
1421 const struct file_operations iwl_dbgfs_d3_test_ops = {
1422         .llseek = no_llseek,
1423         .open = iwl_mvm_d3_test_open,
1424         .read = iwl_mvm_d3_test_read,
1425         .release = iwl_mvm_d3_test_release,
1426 };
1427 #endif