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
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
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  25  * in the file called COPYING.
  26  *
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  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)
 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         struct iwl_proto_offload_cmd cmd = {};
 382 #if IS_ENABLED(CONFIG_IPV6)
 383         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 384         int i;
 385
 386         if (mvmvif->num_target_ipv6_addrs) {
 387                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_NS);
 388                 memcpy(cmd.ndp_mac_addr, vif->addr, ETH_ALEN);
 389         }
 390
 391         BUILD_BUG_ON(sizeof(cmd.target_ipv6_addr[i]) !=
 392                      sizeof(mvmvif->target_ipv6_addrs[i]));
 393
 394         for (i = 0; i < mvmvif->num_target_ipv6_addrs; i++)
 395                 memcpy(cmd.target_ipv6_addr[i],
 396                        &mvmvif->target_ipv6_addrs[i],
 397                        sizeof(cmd.target_ipv6_addr[i]));
 398 #endif
 399
 400         if (vif->bss_conf.arp_addr_cnt) {
 401                 cmd.enabled |= cpu_to_le32(IWL_D3_PROTO_OFFLOAD_ARP);
 402                 cmd.host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
 403                 memcpy(cmd.arp_mac_addr, vif->addr, ETH_ALEN);
 404         }
 405
 406         if (!cmd.enabled)
 407                 return 0;
 408
 409         return iwl_mvm_send_cmd_pdu(mvm, PROT_OFFLOAD_CONFIG_CMD, CMD_SYNC,
 410                                     sizeof(cmd), &cmd);
 411 }
 412
 413 enum iwl_mvm_tcp_packet_type {
 414         MVM_TCP_TX_SYN,
 415         MVM_TCP_RX_SYNACK,
 416         MVM_TCP_TX_DATA,
 417         MVM_TCP_RX_ACK,
 418         MVM_TCP_RX_WAKE,
 419         MVM_TCP_TX_FIN,
 420 };
 421
 422 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 423 {
 424         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 425         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 426 }
 427
 428 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
 429                                      struct cfg80211_wowlan_tcp *tcp,
 430                                      void *_pkt, u8 *mask,
 431                                      __le16 *pseudo_hdr_csum,
 432                                      enum iwl_mvm_tcp_packet_type ptype)
 433 {
 434         struct {
 435                 struct ethhdr eth;
 436                 struct iphdr ip;
 437                 struct tcphdr tcp;
 438                 u8 data[];
 439         } __packed *pkt = _pkt;
 440         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 441         int i;
 442
 443         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 444         pkt->ip.version = 4;
 445         pkt->ip.ihl = 5;
 446         pkt->ip.protocol = IPPROTO_TCP;
 447
 448         switch (ptype) {
 449         case MVM_TCP_TX_SYN:
 450         case MVM_TCP_TX_DATA:
 451         case MVM_TCP_TX_FIN:
 452                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 453                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 454                 pkt->ip.ttl = 128;
 455                 pkt->ip.saddr = tcp->src;
 456                 pkt->ip.daddr = tcp->dst;
 457                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 458                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 459                 /* overwritten for TX SYN later */
 460                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 461                 pkt->tcp.window = cpu_to_be16(65000);
 462                 break;
 463         case MVM_TCP_RX_SYNACK:
 464         case MVM_TCP_RX_ACK:
 465         case MVM_TCP_RX_WAKE:
 466                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 467                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 468                 pkt->ip.saddr = tcp->dst;
 469                 pkt->ip.daddr = tcp->src;
 470                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 471                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 472                 break;
 473         default:
 474                 WARN_ON(1);
 475                 return;
 476         }
 477
 478         switch (ptype) {
 479         case MVM_TCP_TX_SYN:
 480                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 481                 memset(pkt->data, 0x01, 8);
 482                 ip_tot_len += 8;
 483                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 484                 pkt->tcp.syn = 1;
 485                 break;
 486         case MVM_TCP_TX_DATA:
 487                 ip_tot_len += tcp->payload_len;
 488                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 489                 pkt->tcp.psh = 1;
 490                 pkt->tcp.ack = 1;
 491                 break;
 492         case MVM_TCP_TX_FIN:
 493                 pkt->tcp.fin = 1;
 494                 pkt->tcp.ack = 1;
 495                 break;
 496         case MVM_TCP_RX_SYNACK:
 497                 pkt->tcp.syn = 1;
 498                 pkt->tcp.ack = 1;
 499                 break;
 500         case MVM_TCP_RX_ACK:
 501                 pkt->tcp.ack = 1;
 502                 break;
 503         case MVM_TCP_RX_WAKE:
 504                 ip_tot_len += tcp->wake_len;
 505                 pkt->tcp.psh = 1;
 506                 pkt->tcp.ack = 1;
 507                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 508                 break;
 509         }
 510
 511         switch (ptype) {
 512         case MVM_TCP_TX_SYN:
 513         case MVM_TCP_TX_DATA:
 514         case MVM_TCP_TX_FIN:
 515                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 516                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 517                 break;
 518         case MVM_TCP_RX_WAKE:
 519                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 520                         u8 tmp = tcp->wake_mask[i];
 521                         mask[i + 6] |= tmp << 6;
 522                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 523                                 mask[i + 7] = tmp >> 2;
 524                 }
 525                 /* fall through for ethernet/IP/TCP headers mask */
 526         case MVM_TCP_RX_SYNACK:
 527         case MVM_TCP_RX_ACK:
 528                 mask[0] = 0xff; /* match ethernet */
 529                 /*
 530                  * match ethernet, ip.version, ip.ihl
 531                  * the ip.ihl half byte is really masked out by firmware
 532                  */
 533                 mask[1] = 0x7f;
 534                 mask[2] = 0x80; /* match ip.protocol */
 535                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 536                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 537                 mask[5] = 0x80; /* match tcp flags */
 538                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 539                 break;
 540         };
 541
 542         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 543                                             pkt->ip.saddr, pkt->ip.daddr);
 544 }
 545
 546 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 547                                         struct ieee80211_vif *vif,
 548                                         struct cfg80211_wowlan_tcp *tcp)
 549 {
 550         struct iwl_wowlan_remote_wake_config *cfg;
 551         struct iwl_host_cmd cmd = {
 552                 .id = REMOTE_WAKE_CONFIG_CMD,
 553                 .len = { sizeof(*cfg), },
 554                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 555                 .flags = CMD_SYNC,
 556         };
 557         int ret;
 558
 559         if (!tcp)
 560                 return 0;
 561
 562         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 563         if (!cfg)
 564                 return -ENOMEM;
 565         cmd.data[0] = cfg;
 566
 567         cfg->max_syn_retries = 10;
 568         cfg->max_data_retries = 10;
 569         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 570         cfg->tcp_ack_timeout = 1; /* seconds */
 571
 572         /* SYN (TX) */
 573         iwl_mvm_build_tcp_packet(
 574                 vif, tcp, cfg->syn_tx.data, NULL,
 575                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 576                 MVM_TCP_TX_SYN);
 577         cfg->syn_tx.info.tcp_payload_length = 0;
 578
 579         /* SYN/ACK (RX) */
 580         iwl_mvm_build_tcp_packet(
 581                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 582                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 583                 MVM_TCP_RX_SYNACK);
 584         cfg->synack_rx.info.tcp_payload_length = 0;
 585
 586         /* KEEPALIVE/ACK (TX) */
 587         iwl_mvm_build_tcp_packet(
 588                 vif, tcp, cfg->keepalive_tx.data, NULL,
 589                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 590                 MVM_TCP_TX_DATA);
 591         cfg->keepalive_tx.info.tcp_payload_length =
 592                 cpu_to_le16(tcp->payload_len);
 593         cfg->sequence_number_offset = tcp->payload_seq.offset;
 594         /* length must be 0..4, the field is little endian */
 595         cfg->sequence_number_length = tcp->payload_seq.len;
 596         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 597         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 598         if (tcp->payload_tok.len) {
 599                 cfg->token_offset = tcp->payload_tok.offset;
 600                 cfg->token_length = tcp->payload_tok.len;
 601                 cfg->num_tokens =
 602                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 603                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 604                        tcp->tokens_size);
 605         } else {
 606                 /* set tokens to max value to almost never run out */
 607                 cfg->num_tokens = cpu_to_le16(65535);
 608         }
 609
 610         /* ACK (RX) */
 611         iwl_mvm_build_tcp_packet(
 612                 vif, tcp, cfg->keepalive_ack_rx.data,
 613                 cfg->keepalive_ack_rx.rx_mask,
 614                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 615                 MVM_TCP_RX_ACK);
 616         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 617
 618         /* WAKEUP (RX) */
 619         iwl_mvm_build_tcp_packet(
 620                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 621                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 622                 MVM_TCP_RX_WAKE);
 623         cfg->wake_rx.info.tcp_payload_length =
 624                 cpu_to_le16(tcp->wake_len);
 625
 626         /* FIN */
 627         iwl_mvm_build_tcp_packet(
 628                 vif, tcp, cfg->fin_tx.data, NULL,
 629                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 630                 MVM_TCP_TX_FIN);
 631         cfg->fin_tx.info.tcp_payload_length = 0;
 632
 633         ret = iwl_mvm_send_cmd(mvm, &cmd);
 634         kfree(cfg);
 635
 636         return ret;
 637 }
 638
 639 struct iwl_d3_iter_data {
 640         struct iwl_mvm *mvm;
 641         struct ieee80211_vif *vif;
 642         bool error;
 643 };
 644
 645 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
 646                                       struct ieee80211_vif *vif)
 647 {
 648         struct iwl_d3_iter_data *data = _data;
 649         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 650
 651         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 652                 return;
 653
 654         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 655                 return;
 656
 657         if (data->vif) {
 658                 IWL_ERR(data->mvm, "More than one managed interface active!\n");
 659                 data->error = true;
 660                 return;
 661         }
 662
 663         data->vif = vif;
 664 }
 665
 666 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 667                                 struct ieee80211_sta *ap_sta)
 668 {
 669         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 670         struct ieee80211_chanctx_conf *ctx;
 671         u8 chains_static, chains_dynamic;
 672         struct cfg80211_chan_def chandef;
 673         int ret, i;
 674         struct iwl_binding_cmd binding_cmd = {};
 675         struct iwl_time_quota_cmd quota_cmd = {};
 676         u32 status;
 677
 678         /* add back the PHY */
 679         if (WARN_ON(!mvmvif->phy_ctxt))
 680                 return -EINVAL;
 681
 682         rcu_read_lock();
 683         ctx = rcu_dereference(vif->chanctx_conf);
 684         if (WARN_ON(!ctx)) {
 685                 rcu_read_unlock();
 686                 return -EINVAL;
 687         }
 688         chandef = ctx->def;
 689         chains_static = ctx->rx_chains_static;
 690         chains_dynamic = ctx->rx_chains_dynamic;
 691         rcu_read_unlock();
 692
 693         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 694                                    chains_static, chains_dynamic);
 695         if (ret)
 696                 return ret;
 697
 698         /* add back the MAC */
 699         mvmvif->uploaded = false;
 700
 701         if (WARN_ON(!vif->bss_conf.assoc))
 702                 return -EINVAL;
 703         /* hack */
 704         vif->bss_conf.assoc = false;
 705         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 706         vif->bss_conf.assoc = true;
 707         if (ret)
 708                 return ret;
 709
 710         /* add back binding - XXX refactor? */
 711         binding_cmd.id_and_color =
 712                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 713                                                 mvmvif->phy_ctxt->color));
 714         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 715         binding_cmd.phy =
 716                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 717                                                 mvmvif->phy_ctxt->color));
 718         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 719                                                               mvmvif->color));
 720         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 721                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 722
 723         status = 0;
 724         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 725                                           sizeof(binding_cmd), &binding_cmd,
 726                                           &status);
 727         if (ret) {
 728                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 729                 return ret;
 730         }
 731
 732         if (status) {
 733                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 734                 return -EIO;
 735         }
 736
 737         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 738         if (ret)
 739                 return ret;
 740         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 741
 742         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 743         if (ret)
 744                 return ret;
 745
 746         /* and some quota */
 747         quota_cmd.quotas[0].id_and_color =
 748                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 749                                                 mvmvif->phy_ctxt->color));
 750         quota_cmd.quotas[0].quota = cpu_to_le32(100);
 751         quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
 752
 753         for (i = 1; i < MAX_BINDINGS; i++)
 754                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 755
 756         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 757                                    sizeof(quota_cmd), &quota_cmd);
 758         if (ret)
 759                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 760
 761         return 0;
 762 }
 763
 764 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 765                              struct cfg80211_wowlan *wowlan,
 766                              bool test)
 767 {
 768         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 769         struct iwl_d3_iter_data suspend_iter_data = {
 770                 .mvm = mvm,
 771         };
 772         struct ieee80211_vif *vif;
 773         struct iwl_mvm_vif *mvmvif;
 774         struct ieee80211_sta *ap_sta;
 775         struct iwl_mvm_sta *mvm_ap_sta;
 776         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 777         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 778         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 779         struct iwl_d3_manager_config d3_cfg_cmd_data = {
 780                 /*
 781                  * Program the minimum sleep time to 10 seconds, as many
 782                  * platforms have issues processing a wakeup signal while
 783                  * still being in the process of suspending.
 784                  */
 785                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
 786         };
 787         struct iwl_host_cmd d3_cfg_cmd = {
 788                 .id = D3_CONFIG_CMD,
 789                 .flags = CMD_SYNC | CMD_WANT_SKB,
 790                 .data[0] = &d3_cfg_cmd_data,
 791                 .len[0] = sizeof(d3_cfg_cmd_data),
 792         };
 793         struct wowlan_key_data key_data = {
 794                 .use_rsc_tsc = false,
 795                 .tkip = &tkip_cmd,
 796                 .use_tkip = false,
 797         };
 798         int ret, i;
 799         int len __maybe_unused;
 800         u16 seq;
 801         u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
 802
 803         if (!wowlan) {
 804                 /*
 805                  * mac80211 shouldn't get here, but for D3 test
 806                  * it doesn't warrant a warning
 807                  */
 808                 WARN_ON(!test);
 809                 return -EINVAL;
 810         }
 811
 812         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 813         if (!key_data.rsc_tsc)
 814                 return -ENOMEM;
 815
 816         mutex_lock(&mvm->mutex);
 817
 818         old_aux_sta_id = mvm->aux_sta.sta_id;
 819
 820         /* see if there's only a single BSS vif and it's associated */
 821         ieee80211_iterate_active_interfaces_atomic(
 822                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 823                 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
 824
 825         if (suspend_iter_data.error || !suspend_iter_data.vif) {
 826                 ret = 1;
 827                 goto out_noreset;
 828         }
 829
 830         vif = suspend_iter_data.vif;
 831         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 832
 833         ap_sta = rcu_dereference_protected(
 834                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 835                         lockdep_is_held(&mvm->mutex));
 836         if (IS_ERR_OR_NULL(ap_sta)) {
 837                 ret = -EINVAL;
 838                 goto out_noreset;
 839         }
 840
 841         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 842
 843         /*
 844          * The D3 firmware still hardcodes the AP station ID for the
 845          * BSS we're associated with as 0. Store the real STA ID here
 846          * and assign 0. When we leave this function, we'll restore
 847          * the original value for the resume code.
 848          */
 849         old_ap_sta_id = mvm_ap_sta->sta_id;
 850         mvm_ap_sta->sta_id = 0;
 851         mvmvif->ap_sta_id = 0;
 852
 853         /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
 854
 855         wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
 856
 857         /*
 858          * We know the last used seqno, and the uCode expects to know that
 859          * one, it will increment before TX.
 860          */
 861         seq = mvm_ap_sta->last_seq_ctl & IEEE80211_SCTL_SEQ;
 862         wowlan_config_cmd.non_qos_seq = cpu_to_le16(seq);
 863
 864         /*
 865          * For QoS counters, we store the one to use next, so subtract 0x10
 866          * since the uCode will add 0x10 *before* using the value while we
 867          * increment after using the value (i.e. store the next value to use).
 868          */
 869         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 870                 seq = mvm_ap_sta->tid_data[i].seq_number;
 871                 seq -= 0x10;
 872                 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
 873         }
 874
 875         if (wowlan->disconnect)
 876                 wowlan_config_cmd.wakeup_filter |=
 877                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 878                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 879         if (wowlan->magic_pkt)
 880                 wowlan_config_cmd.wakeup_filter |=
 881                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 882         if (wowlan->gtk_rekey_failure)
 883                 wowlan_config_cmd.wakeup_filter |=
 884                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 885         if (wowlan->eap_identity_req)
 886                 wowlan_config_cmd.wakeup_filter |=
 887                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 888         if (wowlan->four_way_handshake)
 889                 wowlan_config_cmd.wakeup_filter |=
 890                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 891         if (wowlan->n_patterns)
 892                 wowlan_config_cmd.wakeup_filter |=
 893                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 894
 895         if (wowlan->rfkill_release)
 896                 wowlan_config_cmd.wakeup_filter |=
 897                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 898
 899         if (wowlan->tcp) {
 900                 /*
 901                  * Set the "link change" (really "link lost") flag as well
 902                  * since that implies losing the TCP connection.
 903                  */
 904                 wowlan_config_cmd.wakeup_filter |=
 905                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 906                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 907                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 908                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 909         }
 910
 911         iwl_mvm_cancel_scan(mvm);
 912
 913         iwl_trans_stop_device(mvm->trans);
 914
 915         /*
 916          * Set the HW restart bit -- this is mostly true as we're
 917          * going to load new firmware and reprogram that, though
 918          * the reprogramming is going to be manual to avoid adding
 919          * all the MACs that aren't support.
 920          * We don't have to clear up everything though because the
 921          * reprogramming is manual. When we resume, we'll actually
 922          * go through a proper restart sequence again to switch
 923          * back to the runtime firmware image.
 924          */
 925         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 926
 927         /* We reprogram keys and shouldn't allocate new key indices */
 928         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 929
 930         mvm->ptk_ivlen = 0;
 931         mvm->ptk_icvlen = 0;
 932         mvm->ptk_ivlen = 0;
 933         mvm->ptk_icvlen = 0;
 934
 935         /*
 936          * The D3 firmware still hardcodes the AP station ID for the
 937          * BSS we're associated with as 0. As a result, we have to move
 938          * the auxiliary station to ID 1 so the ID 0 remains free for
 939          * the AP station for later.
 940          * We set the sta_id to 1 here, and reset it to its previous
 941          * value (that we stored above) later.
 942          */
 943         mvm->aux_sta.sta_id = 1;
 944
 945         ret = iwl_mvm_load_d3_fw(mvm);
 946         if (ret)
 947                 goto out;
 948
 949         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 950         if (ret)
 951                 goto out;
 952
 953         if (!iwlwifi_mod_params.sw_crypto) {
 954                 /*
 955                  * This needs to be unlocked due to lock ordering
 956                  * constraints. Since we're in the suspend path
 957                  * that isn't really a problem though.
 958                  */
 959                 mutex_unlock(&mvm->mutex);
 960                 ieee80211_iter_keys(mvm->hw, vif,
 961                                     iwl_mvm_wowlan_program_keys,
 962                                     &key_data);
 963                 mutex_lock(&mvm->mutex);
 964                 if (key_data.error) {
 965                         ret = -EIO;
 966                         goto out;
 967                 }
 968
 969                 if (key_data.use_rsc_tsc) {
 970                         struct iwl_host_cmd rsc_tsc_cmd = {
 971                                 .id = WOWLAN_TSC_RSC_PARAM,
 972                                 .flags = CMD_SYNC,
 973                                 .data[0] = key_data.rsc_tsc,
 974                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 975                                 .len[0] = sizeof(*key_data.rsc_tsc),
 976                         };
 977
 978                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
 979                         if (ret)
 980                                 goto out;
 981                 }
 982
 983                 if (key_data.use_tkip) {
 984                         ret = iwl_mvm_send_cmd_pdu(mvm,
 985                                                    WOWLAN_TKIP_PARAM,
 986                                                    CMD_SYNC, sizeof(tkip_cmd),
 987                                                    &tkip_cmd);
 988                         if (ret)
 989                                 goto out;
 990                 }
 991
 992                 if (mvmvif->rekey_data.valid) {
 993                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 994                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 995                                NL80211_KCK_LEN);
 996                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 997                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 998                                NL80211_KEK_LEN);
 999                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1000                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1001
1002                         ret = iwl_mvm_send_cmd_pdu(mvm,
1003                                                    WOWLAN_KEK_KCK_MATERIAL,
1004                                                    CMD_SYNC,
1005                                                    sizeof(kek_kck_cmd),
1006                                                    &kek_kck_cmd);
1007                         if (ret)
1008                                 goto out;
1009                 }
1010         }
1011
1012         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
1013                                    CMD_SYNC, sizeof(wowlan_config_cmd),
1014                                    &wowlan_config_cmd);
1015         if (ret)
1016                 goto out;
1017
1018         ret = iwl_mvm_send_patterns(mvm, wowlan);
1019         if (ret)
1020                 goto out;
1021
1022         ret = iwl_mvm_send_proto_offload(mvm, vif);
1023         if (ret)
1024                 goto out;
1025
1026         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1027         if (ret)
1028                 goto out;
1029
1030         ret = iwl_mvm_power_update_mode(mvm, vif);
1031         if (ret)
1032                 goto out;
1033
1034 #ifdef CONFIG_IWLWIFI_DEBUGFS
1035         if (mvm->d3_wake_sysassert)
1036                 d3_cfg_cmd_data.wakeup_flags |=
1037                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1038 #endif
1039
1040         /* must be last -- this switches firmware state */
1041         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1042         if (ret)
1043                 goto out;
1044 #ifdef CONFIG_IWLWIFI_DEBUGFS
1045         len = le32_to_cpu(d3_cfg_cmd.resp_pkt->len_n_flags) &
1046                 FH_RSCSR_FRAME_SIZE_MSK;
1047         if (len >= sizeof(u32) * 2) {
1048                 mvm->d3_test_pme_ptr =
1049                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1050         } else if (test) {
1051                 /* in test mode we require the pointer */
1052                 ret = -EIO;
1053                 goto out;
1054         }
1055 #endif
1056         iwl_free_resp(&d3_cfg_cmd);
1057
1058         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1059
1060         iwl_trans_d3_suspend(mvm->trans, test);
1061  out:
1062         mvm->aux_sta.sta_id = old_aux_sta_id;
1063         mvm_ap_sta->sta_id = old_ap_sta_id;
1064         mvmvif->ap_sta_id = old_ap_sta_id;
1065  out_noreset:
1066         kfree(key_data.rsc_tsc);
1067         if (ret < 0)
1068                 ieee80211_restart_hw(mvm->hw);
1069
1070         mutex_unlock(&mvm->mutex);
1071
1072         return ret;
1073 }
1074
1075 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1076 {
1077         return __iwl_mvm_suspend(hw, wowlan, false);
1078 }
1079
1080 static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1081                                          struct ieee80211_vif *vif)
1082 {
1083         u32 base = mvm->error_event_table;
1084         struct error_table_start {
1085                 /* cf. struct iwl_error_event_table */
1086                 u32 valid;
1087                 u32 error_id;
1088         } err_info;
1089         struct cfg80211_wowlan_wakeup wakeup = {
1090                 .pattern_idx = -1,
1091         };
1092         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1093         struct iwl_host_cmd cmd = {
1094                 .id = WOWLAN_GET_STATUSES,
1095                 .flags = CMD_SYNC | CMD_WANT_SKB,
1096         };
1097         struct iwl_wowlan_status *status;
1098         u32 reasons;
1099         int ret, len;
1100         struct sk_buff *pkt = NULL;
1101
1102         iwl_trans_read_mem_bytes(mvm->trans, base,
1103                                  &err_info, sizeof(err_info));
1104
1105         if (err_info.valid) {
1106                 IWL_INFO(mvm, "error table is valid (%d)\n",
1107                          err_info.valid);
1108                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1109                         wakeup.rfkill_release = true;
1110                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1111                                                        GFP_KERNEL);
1112                 }
1113                 return;
1114         }
1115
1116         /* only for tracing for now */
1117         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
1118         if (ret)
1119                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1120
1121         ret = iwl_mvm_send_cmd(mvm, &cmd);
1122         if (ret) {
1123                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1124                 return;
1125         }
1126
1127         /* RF-kill already asserted again... */
1128         if (!cmd.resp_pkt)
1129                 return;
1130
1131         len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1132         if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
1133                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1134                 goto out;
1135         }
1136
1137         status = (void *)cmd.resp_pkt->data;
1138
1139         if (len - sizeof(struct iwl_cmd_header) !=
1140             sizeof(*status) +
1141             ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
1142                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1143                 goto out;
1144         }
1145
1146         reasons = le32_to_cpu(status->wakeup_reasons);
1147
1148         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1149                 wakeup_report = NULL;
1150                 goto report;
1151         }
1152
1153         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1154                 wakeup.magic_pkt = true;
1155
1156         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1157                 wakeup.pattern_idx =
1158                         le16_to_cpu(status->pattern_number);
1159
1160         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1161                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1162                 wakeup.disconnect = true;
1163
1164         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1165                 wakeup.gtk_rekey_failure = true;
1166
1167         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1168                 wakeup.rfkill_release = true;
1169
1170         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1171                 wakeup.eap_identity_req = true;
1172
1173         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1174                 wakeup.four_way_handshake = true;
1175
1176         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1177                 wakeup.tcp_connlost = true;
1178
1179         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1180                 wakeup.tcp_nomoretokens = true;
1181
1182         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1183                 wakeup.tcp_match = true;
1184
1185         if (status->wake_packet_bufsize) {
1186                 int pktsize = le32_to_cpu(status->wake_packet_bufsize);
1187                 int pktlen = le32_to_cpu(status->wake_packet_length);
1188                 const u8 *pktdata = status->wake_packet;
1189                 struct ieee80211_hdr *hdr = (void *)pktdata;
1190                 int truncated = pktlen - pktsize;
1191
1192                 /* this would be a firmware bug */
1193                 if (WARN_ON_ONCE(truncated < 0))
1194                         truncated = 0;
1195
1196                 if (ieee80211_is_data(hdr->frame_control)) {
1197                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1198                         int ivlen = 0, icvlen = 4; /* also FCS */
1199
1200                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1201                         if (!pkt)
1202                                 goto report;
1203
1204                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1205                         pktdata += hdrlen;
1206                         pktsize -= hdrlen;
1207
1208                         if (ieee80211_has_protected(hdr->frame_control)) {
1209                                 if (is_multicast_ether_addr(hdr->addr1)) {
1210                                         ivlen = mvm->gtk_ivlen;
1211                                         icvlen += mvm->gtk_icvlen;
1212                                 } else {
1213                                         ivlen = mvm->ptk_ivlen;
1214                                         icvlen += mvm->ptk_icvlen;
1215                                 }
1216                         }
1217
1218                         /* if truncated, FCS/ICV is (partially) gone */
1219                         if (truncated >= icvlen) {
1220                                 icvlen = 0;
1221                                 truncated -= icvlen;
1222                         } else {
1223                                 icvlen -= truncated;
1224                                 truncated = 0;
1225                         }
1226
1227                         pktsize -= ivlen + icvlen;
1228                         pktdata += ivlen;
1229
1230                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1231
1232                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1233                                 goto report;
1234                         wakeup.packet = pkt->data;
1235                         wakeup.packet_present_len = pkt->len;
1236                         wakeup.packet_len = pkt->len - truncated;
1237                         wakeup.packet_80211 = false;
1238                 } else {
1239                         int fcslen = 4;
1240
1241                         if (truncated >= 4) {
1242                                 truncated -= 4;
1243                                 fcslen = 0;
1244                         } else {
1245                                 fcslen -= truncated;
1246                                 truncated = 0;
1247                         }
1248                         pktsize -= fcslen;
1249                         wakeup.packet = status->wake_packet;
1250                         wakeup.packet_present_len = pktsize;
1251                         wakeup.packet_len = pktlen - truncated;
1252                         wakeup.packet_80211 = true;
1253                 }
1254         }
1255
1256  report:
1257         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1258         kfree_skb(pkt);
1259
1260  out:
1261         iwl_free_resp(&cmd);
1262 }
1263
1264 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1265 {
1266 #ifdef CONFIG_IWLWIFI_DEBUGFS
1267         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1268         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1269         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1270
1271         if (!mvm->store_d3_resume_sram)
1272                 return;
1273
1274         if (!mvm->d3_resume_sram) {
1275                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1276                 if (!mvm->d3_resume_sram)
1277                         return;
1278         }
1279
1280         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1281 #endif
1282 }
1283
1284 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1285 {
1286         struct iwl_d3_iter_data resume_iter_data = {
1287                 .mvm = mvm,
1288         };
1289         struct ieee80211_vif *vif = NULL;
1290         int ret;
1291         enum iwl_d3_status d3_status;
1292
1293         mutex_lock(&mvm->mutex);
1294
1295         /* get the BSS vif pointer again */
1296         ieee80211_iterate_active_interfaces_atomic(
1297                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1298                 iwl_mvm_d3_iface_iterator, &resume_iter_data);
1299
1300         if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
1301                 goto out_unlock;
1302
1303         vif = resume_iter_data.vif;
1304
1305         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1306         if (ret)
1307                 goto out_unlock;
1308
1309         if (d3_status != IWL_D3_STATUS_ALIVE) {
1310                 IWL_INFO(mvm, "Device was reset during suspend\n");
1311                 goto out_unlock;
1312         }
1313
1314         /* query SRAM first in case we want event logging */
1315         iwl_mvm_read_d3_sram(mvm);
1316
1317         iwl_mvm_query_wakeup_reasons(mvm, vif);
1318
1319  out_unlock:
1320         mutex_unlock(&mvm->mutex);
1321
1322         if (!test && vif)
1323                 ieee80211_resume_disconnect(vif);
1324
1325         /* return 1 to reconfigure the device */
1326         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1327         return 1;
1328 }
1329
1330 int iwl_mvm_resume(struct ieee80211_hw *hw)
1331 {
1332         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1333
1334         return __iwl_mvm_resume(mvm, false);
1335 }
1336
1337 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1338 {
1339         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1340
1341         device_set_wakeup_enable(mvm->trans->dev, enabled);
1342 }
1343
1344 #ifdef CONFIG_IWLWIFI_DEBUGFS
1345 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1346 {
1347         struct iwl_mvm *mvm = inode->i_private;
1348         int err;
1349
1350         if (mvm->d3_test_active)
1351                 return -EBUSY;
1352
1353         file->private_data = inode->i_private;
1354
1355         ieee80211_stop_queues(mvm->hw);
1356         synchronize_net();
1357
1358         /* start pseudo D3 */
1359         rtnl_lock();
1360         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1361         rtnl_unlock();
1362         if (err > 0)
1363                 err = -EINVAL;
1364         if (err) {
1365                 ieee80211_wake_queues(mvm->hw);
1366                 return err;
1367         }
1368         mvm->d3_test_active = true;
1369         return 0;
1370 }
1371
1372 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1373                                     size_t count, loff_t *ppos)
1374 {
1375         struct iwl_mvm *mvm = file->private_data;
1376         u32 pme_asserted;
1377
1378         while (true) {
1379                 pme_asserted = iwl_trans_read_mem32(mvm->trans,
1380                                                     mvm->d3_test_pme_ptr);
1381                 if (pme_asserted)
1382                         break;
1383                 if (msleep_interruptible(100))
1384                         break;
1385         }
1386
1387         return 0;
1388 }
1389
1390 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1391                                               struct ieee80211_vif *vif)
1392 {
1393         if (vif->type == NL80211_IFTYPE_STATION)
1394                 ieee80211_connection_loss(vif);
1395 }
1396
1397 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1398 {
1399         struct iwl_mvm *mvm = inode->i_private;
1400         int remaining_time = 10;
1401
1402         mvm->d3_test_active = false;
1403         __iwl_mvm_resume(mvm, true);
1404         iwl_abort_notification_waits(&mvm->notif_wait);
1405         ieee80211_restart_hw(mvm->hw);
1406
1407         /* wait for restart and disconnect all interfaces */
1408         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1409                remaining_time > 0) {
1410                 remaining_time--;
1411                 msleep(1000);
1412         }
1413
1414         if (remaining_time == 0)
1415                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1416
1417         ieee80211_iterate_active_interfaces_atomic(
1418                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1419                 iwl_mvm_d3_test_disconn_work_iter, NULL);
1420
1421         ieee80211_wake_queues(mvm->hw);
1422
1423         return 0;
1424 }
1425
1426 const struct file_operations iwl_dbgfs_d3_test_ops = {
1427         .llseek = no_llseek,
1428         .open = iwl_mvm_d3_test_open,
1429         .read = iwl_mvm_d3_test_read,
1430         .release = iwl_mvm_d3_test_release,
1431 };
1432 #endif