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
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  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
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  20  * along with this program; if not, write to the Free Software
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  22  * USA
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  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  30  *
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  32  *
  33  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  41  *    notice, this list of conditions and the following disclaimer.
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  43  *    notice, this list of conditions and the following disclaimer in
  44  *    the documentation and/or other materials provided with the
  45  *    distribution.
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  58  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63
  64 #include <linux/etherdevice.h>
  65 #include <linux/ip.h>
  66 #include <linux/fs.h>
  67 #include <net/cfg80211.h>
  68 #include <net/ipv6.h>
  69 #include <net/tcp.h>
  70 #include <net/addrconf.h>
  71 #include "iwl-modparams.h"
  72 #include "fw-api.h"
  73 #include "mvm.h"
  74
  75 void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  76                             struct ieee80211_vif *vif,
  77                             struct cfg80211_gtk_rekey_data *data)
  78 {
  79         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  80         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  81
  82         if (iwlwifi_mod_params.sw_crypto)
  83                 return;
  84
  85         mutex_lock(&mvm->mutex);
  86
  87         memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  88         memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  89         mvmvif->rekey_data.replay_ctr =
  90                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
  91         mvmvif->rekey_data.valid = true;
  92
  93         mutex_unlock(&mvm->mutex);
  94 }
  95
  96 #if IS_ENABLED(CONFIG_IPV6)
  97 void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
  98                               struct ieee80211_vif *vif,
  99                               struct inet6_dev *idev)
 100 {
 101         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 102         struct inet6_ifaddr *ifa;
 103         int idx = 0;
 104
 105         read_lock_bh(&idev->lock);
 106         list_for_each_entry(ifa, &idev->addr_list, if_list) {
 107                 mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 108                 idx++;
 109                 if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
 110                         break;
 111         }
 112         read_unlock_bh(&idev->lock);
 113
 114         mvmvif->num_target_ipv6_addrs = idx;
 115 }
 116 #endif
 117
 118 void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 119                                      struct ieee80211_vif *vif, int idx)
 120 {
 121         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 122
 123         mvmvif->tx_key_idx = idx;
 124 }
 125
 126 static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 127 {
 128         int i;
 129
 130         for (i = 0; i < IWL_P1K_SIZE; i++)
 131                 out[i] = cpu_to_le16(p1k[i]);
 132 }
 133
 134 struct wowlan_key_data {
 135         struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 136         struct iwl_wowlan_tkip_params_cmd *tkip;
 137         bool error, use_rsc_tsc, use_tkip;
 138         int wep_key_idx;
 139 };
 140
 141 static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 142                                         struct ieee80211_vif *vif,
 143                                         struct ieee80211_sta *sta,
 144                                         struct ieee80211_key_conf *key,
 145                                         void *_data)
 146 {
 147         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 148         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 149         struct wowlan_key_data *data = _data;
 150         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 151         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 152         struct iwl_p1k_cache *rx_p1ks;
 153         u8 *rx_mic_key;
 154         struct ieee80211_key_seq seq;
 155         u32 cur_rx_iv32 = 0;
 156         u16 p1k[IWL_P1K_SIZE];
 157         int ret, i;
 158
 159         mutex_lock(&mvm->mutex);
 160
 161         switch (key->cipher) {
 162         case WLAN_CIPHER_SUITE_WEP40:
 163         case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 164                 struct {
 165                         struct iwl_mvm_wep_key_cmd wep_key_cmd;
 166                         struct iwl_mvm_wep_key wep_key;
 167                 } __packed wkc = {
 168                         .wep_key_cmd.mac_id_n_color =
 169                                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 170                                                                 mvmvif->color)),
 171                         .wep_key_cmd.num_keys = 1,
 172                         /* firmware sets STA_KEY_FLG_WEP_13BYTES */
 173                         .wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 174                         .wep_key.key_index = key->keyidx,
 175                         .wep_key.key_size = key->keylen,
 176                 };
 177
 178                 /*
 179                  * This will fail -- the key functions don't set support
 180                  * pairwise WEP keys. However, that's better than silently
 181                  * failing WoWLAN. Or maybe not?
 182                  */
 183                 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 184                         break;
 185
 186                 memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 187                 if (key->keyidx == mvmvif->tx_key_idx) {
 188                         /* TX key must be at offset 0 */
 189                         wkc.wep_key.key_offset = 0;
 190                 } else {
 191                         /* others start at 1 */
 192                         data->wep_key_idx++;
 193                         wkc.wep_key.key_offset = data->wep_key_idx;
 194                 }
 195
 196                 ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, CMD_SYNC,
 197                                            sizeof(wkc), &wkc);
 198                 data->error = ret != 0;
 199
 200                 mvm->ptk_ivlen = key->iv_len;
 201                 mvm->ptk_icvlen = key->icv_len;
 202                 mvm->gtk_ivlen = key->iv_len;
 203                 mvm->gtk_icvlen = key->icv_len;
 204
 205                 /* don't upload key again */
 206                 goto out_unlock;
 207         }
 208         default:
 209                 data->error = true;
 210                 goto out_unlock;
 211         case WLAN_CIPHER_SUITE_AES_CMAC:
 212                 /*
 213                  * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 214                  * but we also shouldn't abort suspend due to that. It does have
 215                  * support for the IGTK key renewal, but doesn't really use the
 216                  * IGTK for anything. This means we could spuriously wake up or
 217                  * be deauthenticated, but that was considered acceptable.
 218                  */
 219                 goto out_unlock;
 220         case WLAN_CIPHER_SUITE_TKIP:
 221                 if (sta) {
 222                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 223                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 224
 225                         rx_p1ks = data->tkip->rx_uni;
 226
 227                         ieee80211_get_key_tx_seq(key, &seq);
 228                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 229                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 230
 231                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 232                         iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 233
 234                         memcpy(data->tkip->mic_keys.tx,
 235                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 236                                IWL_MIC_KEY_SIZE);
 237
 238                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 239                 } else {
 240                         tkip_sc =
 241                                 data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 242                         rx_p1ks = data->tkip->rx_multi;
 243                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 244                 }
 245
 246                 /*
 247                  * For non-QoS this relies on the fact that both the uCode and
 248                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 249                  * for checking the IV in the frames.
 250                  */
 251                 for (i = 0; i < IWL_NUM_RSC; i++) {
 252                         ieee80211_get_key_rx_seq(key, i, &seq);
 253                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 254                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 255                         /* wrapping isn't allowed, AP must rekey */
 256                         if (seq.tkip.iv32 > cur_rx_iv32)
 257                                 cur_rx_iv32 = seq.tkip.iv32;
 258                 }
 259
 260                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 261                                           cur_rx_iv32, p1k);
 262                 iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 263                 ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 264                                           cur_rx_iv32 + 1, p1k);
 265                 iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 266
 267                 memcpy(rx_mic_key,
 268                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 269                        IWL_MIC_KEY_SIZE);
 270
 271                 data->use_tkip = true;
 272                 data->use_rsc_tsc = true;
 273                 break;
 274         case WLAN_CIPHER_SUITE_CCMP:
 275                 if (sta) {
 276                         u8 *pn = seq.ccmp.pn;
 277
 278                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 279                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 280
 281                         ieee80211_get_key_tx_seq(key, &seq);
 282                         aes_tx_sc->pn = cpu_to_le64((u64)pn[5] |
 283                                                     ((u64)pn[4] << 8) |
 284                                                     ((u64)pn[3] << 16) |
 285                                                     ((u64)pn[2] << 24) |
 286                                                     ((u64)pn[1] << 32) |
 287                                                     ((u64)pn[0] << 40));
 288                 } else {
 289                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 290                 }
 291
 292                 /*
 293                  * For non-QoS this relies on the fact that both the uCode and
 294                  * mac80211 use TID 0 for checking the IV in the frames.
 295                  */
 296                 for (i = 0; i < IWL_NUM_RSC; i++) {
 297                         u8 *pn = seq.ccmp.pn;
 298
 299                         ieee80211_get_key_rx_seq(key, i, &seq);
 300                         aes_sc->pn = cpu_to_le64((u64)pn[5] |
 301                                                  ((u64)pn[4] << 8) |
 302                                                  ((u64)pn[3] << 16) |
 303                                                  ((u64)pn[2] << 24) |
 304                                                  ((u64)pn[1] << 32) |
 305                                                  ((u64)pn[0] << 40));
 306                 }
 307                 data->use_rsc_tsc = true;
 308                 break;
 309         }
 310
 311         /*
 312          * The D3 firmware hardcodes the key offset 0 as the key it uses
 313          * to transmit packets to the AP, i.e. the PTK.
 314          */
 315         if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 316                 key->hw_key_idx = 0;
 317                 mvm->ptk_ivlen = key->iv_len;
 318                 mvm->ptk_icvlen = key->icv_len;
 319         } else {
 320                 /*
 321                  * firmware only supports TSC/RSC for a single key,
 322                  * so if there are multiple keep overwriting them
 323                  * with new ones -- this relies on mac80211 doing
 324                  * list_add_tail().
 325                  */
 326                 key->hw_key_idx = 1;
 327                 mvm->gtk_ivlen = key->iv_len;
 328                 mvm->gtk_icvlen = key->icv_len;
 329         }
 330
 331         ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, true);
 332         data->error = ret != 0;
 333 out_unlock:
 334         mutex_unlock(&mvm->mutex);
 335 }
 336
 337 static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 338                                  struct cfg80211_wowlan *wowlan)
 339 {
 340         struct iwl_wowlan_patterns_cmd *pattern_cmd;
 341         struct iwl_host_cmd cmd = {
 342                 .id = WOWLAN_PATTERNS,
 343                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 344                 .flags = CMD_SYNC,
 345         };
 346         int i, err;
 347
 348         if (!wowlan->n_patterns)
 349                 return 0;
 350
 351         cmd.len[0] = sizeof(*pattern_cmd) +
 352                 wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 353
 354         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 355         if (!pattern_cmd)
 356                 return -ENOMEM;
 357
 358         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 359
 360         for (i = 0; i < wowlan->n_patterns; i++) {
 361                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 362
 363                 memcpy(&pattern_cmd->patterns[i].mask,
 364                        wowlan->patterns[i].mask, mask_len);
 365                 memcpy(&pattern_cmd->patterns[i].pattern,
 366                        wowlan->patterns[i].pattern,
 367                        wowlan->patterns[i].pattern_len);
 368                 pattern_cmd->patterns[i].mask_size = mask_len;
 369                 pattern_cmd->patterns[i].pattern_size =
 370                         wowlan->patterns[i].pattern_len;
 371         }
 372
 373         cmd.data[0] = pattern_cmd;
 374         err = iwl_mvm_send_cmd(mvm, &cmd);
 375         kfree(pattern_cmd);
 376         return err;
 377 }
 378
 379 static int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
 380                                       struct ieee80211_vif *vif)
 381 {
 382         union {
 383                 struct iwl_proto_offload_cmd_v1 v1;
 384                 struct iwl_proto_offload_cmd_v2 v2;
 385                 struct iwl_proto_offload_cmd_v3_small v3s;
 386                 struct iwl_proto_offload_cmd_v3_large v3l;
 387         } cmd = {};
 388         struct iwl_host_cmd hcmd = {
 389                 .id = PROT_OFFLOAD_CONFIG_CMD,
 390                 .flags = CMD_SYNC,
 391                 .data[0] = &cmd,
 392                 .dataflags[0] = IWL_HCMD_DFL_DUP,
 393         };
 394         struct iwl_proto_offload_cmd_common *common;
 395         u32 enabled = 0, size;
 396         u32 capa_flags = mvm->fw->ucode_capa.flags;
 397 #if IS_ENABLED(CONFIG_IPV6)
 398         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 399         int i;
 400
 401         if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL ||
 402             capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
 403                 struct iwl_ns_config *nsc;
 404                 struct iwl_targ_addr *addrs;
 405                 int n_nsc, n_addrs;
 406                 int c;
 407
 408                 if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
 409                         nsc = cmd.v3s.ns_config;
 410                         n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3S;
 411                         addrs = cmd.v3s.targ_addrs;
 412                         n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3S;
 413                 } else {
 414                         nsc = cmd.v3l.ns_config;
 415                         n_nsc = IWL_PROTO_OFFLOAD_NUM_NS_CONFIG_V3L;
 416                         addrs = cmd.v3l.targ_addrs;
 417                         n_addrs = IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V3L;
 418                 }
 419
 420                 if (mvmvif->num_target_ipv6_addrs)
 421                         enabled |= IWL_D3_PROTO_OFFLOAD_NS;
 422
 423                 /*
 424                  * For each address we have (and that will fit) fill a target
 425                  * address struct and combine for NS offload structs with the
 426                  * solicited node addresses.
 427                  */
 428                 for (i = 0, c = 0;
 429                      i < mvmvif->num_target_ipv6_addrs &&
 430                      i < n_addrs && c < n_nsc; i++) {
 431                         struct in6_addr solicited_addr;
 432                         int j;
 433
 434                         addrconf_addr_solict_mult(&mvmvif->target_ipv6_addrs[i],
 435                                                   &solicited_addr);
 436                         for (j = 0; j < c; j++)
 437                                 if (ipv6_addr_cmp(&nsc[j].dest_ipv6_addr,
 438                                                   &solicited_addr) == 0)
 439                                         break;
 440                         if (j == c)
 441                                 c++;
 442                         addrs[i].addr = mvmvif->target_ipv6_addrs[i];
 443                         addrs[i].config_num = cpu_to_le32(j);
 444                         nsc[j].dest_ipv6_addr = solicited_addr;
 445                         memcpy(nsc[j].target_mac_addr, vif->addr, ETH_ALEN);
 446                 }
 447
 448                 if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL)
 449                         cmd.v3s.num_valid_ipv6_addrs = cpu_to_le32(i);
 450                 else
 451                         cmd.v3l.num_valid_ipv6_addrs = cpu_to_le32(i);
 452         } else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
 453                 if (mvmvif->num_target_ipv6_addrs) {
 454                         enabled |= IWL_D3_PROTO_OFFLOAD_NS;
 455                         memcpy(cmd.v2.ndp_mac_addr, vif->addr, ETH_ALEN);
 456                 }
 457
 458                 BUILD_BUG_ON(sizeof(cmd.v2.target_ipv6_addr[0]) !=
 459                              sizeof(mvmvif->target_ipv6_addrs[0]));
 460
 461                 for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
 462                                     IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V2); i++)
 463                         memcpy(cmd.v2.target_ipv6_addr[i],
 464                                &mvmvif->target_ipv6_addrs[i],
 465                                sizeof(cmd.v2.target_ipv6_addr[i]));
 466         } else {
 467                 if (mvmvif->num_target_ipv6_addrs) {
 468                         enabled |= IWL_D3_PROTO_OFFLOAD_NS;
 469                         memcpy(cmd.v1.ndp_mac_addr, vif->addr, ETH_ALEN);
 470                 }
 471
 472                 BUILD_BUG_ON(sizeof(cmd.v1.target_ipv6_addr[0]) !=
 473                              sizeof(mvmvif->target_ipv6_addrs[0]));
 474
 475                 for (i = 0; i < min(mvmvif->num_target_ipv6_addrs,
 476                                     IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_V1); i++)
 477                         memcpy(cmd.v1.target_ipv6_addr[i],
 478                                &mvmvif->target_ipv6_addrs[i],
 479                                sizeof(cmd.v1.target_ipv6_addr[i]));
 480         }
 481 #endif
 482
 483         if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_SMALL) {
 484                 common = &cmd.v3s.common;
 485                 size = sizeof(cmd.v3s);
 486         } else if (capa_flags & IWL_UCODE_TLV_FLAGS_NEW_NSOFFL_LARGE) {
 487                 common = &cmd.v3l.common;
 488                 size = sizeof(cmd.v3l);
 489         } else if (capa_flags & IWL_UCODE_TLV_FLAGS_D3_6_IPV6_ADDRS) {
 490                 common = &cmd.v2.common;
 491                 size = sizeof(cmd.v2);
 492         } else {
 493                 common = &cmd.v1.common;
 494                 size = sizeof(cmd.v1);
 495         }
 496
 497         if (vif->bss_conf.arp_addr_cnt) {
 498                 enabled |= IWL_D3_PROTO_OFFLOAD_ARP;
 499                 common->host_ipv4_addr = vif->bss_conf.arp_addr_list[0];
 500                 memcpy(common->arp_mac_addr, vif->addr, ETH_ALEN);
 501         }
 502
 503         if (!enabled)
 504                 return 0;
 505
 506         common->enabled = cpu_to_le32(enabled);
 507
 508         hcmd.len[0] = size;
 509         return iwl_mvm_send_cmd(mvm, &hcmd);
 510 }
 511
 512 enum iwl_mvm_tcp_packet_type {
 513         MVM_TCP_TX_SYN,
 514         MVM_TCP_RX_SYNACK,
 515         MVM_TCP_TX_DATA,
 516         MVM_TCP_RX_ACK,
 517         MVM_TCP_RX_WAKE,
 518         MVM_TCP_TX_FIN,
 519 };
 520
 521 static __le16 pseudo_hdr_check(int len, __be32 saddr, __be32 daddr)
 522 {
 523         __sum16 check = tcp_v4_check(len, saddr, daddr, 0);
 524         return cpu_to_le16(be16_to_cpu((__force __be16)check));
 525 }
 526
 527 static void iwl_mvm_build_tcp_packet(struct ieee80211_vif *vif,
 528                                      struct cfg80211_wowlan_tcp *tcp,
 529                                      void *_pkt, u8 *mask,
 530                                      __le16 *pseudo_hdr_csum,
 531                                      enum iwl_mvm_tcp_packet_type ptype)
 532 {
 533         struct {
 534                 struct ethhdr eth;
 535                 struct iphdr ip;
 536                 struct tcphdr tcp;
 537                 u8 data[];
 538         } __packed *pkt = _pkt;
 539         u16 ip_tot_len = sizeof(struct iphdr) + sizeof(struct tcphdr);
 540         int i;
 541
 542         pkt->eth.h_proto = cpu_to_be16(ETH_P_IP),
 543         pkt->ip.version = 4;
 544         pkt->ip.ihl = 5;
 545         pkt->ip.protocol = IPPROTO_TCP;
 546
 547         switch (ptype) {
 548         case MVM_TCP_TX_SYN:
 549         case MVM_TCP_TX_DATA:
 550         case MVM_TCP_TX_FIN:
 551                 memcpy(pkt->eth.h_dest, tcp->dst_mac, ETH_ALEN);
 552                 memcpy(pkt->eth.h_source, vif->addr, ETH_ALEN);
 553                 pkt->ip.ttl = 128;
 554                 pkt->ip.saddr = tcp->src;
 555                 pkt->ip.daddr = tcp->dst;
 556                 pkt->tcp.source = cpu_to_be16(tcp->src_port);
 557                 pkt->tcp.dest = cpu_to_be16(tcp->dst_port);
 558                 /* overwritten for TX SYN later */
 559                 pkt->tcp.doff = sizeof(struct tcphdr) / 4;
 560                 pkt->tcp.window = cpu_to_be16(65000);
 561                 break;
 562         case MVM_TCP_RX_SYNACK:
 563         case MVM_TCP_RX_ACK:
 564         case MVM_TCP_RX_WAKE:
 565                 memcpy(pkt->eth.h_dest, vif->addr, ETH_ALEN);
 566                 memcpy(pkt->eth.h_source, tcp->dst_mac, ETH_ALEN);
 567                 pkt->ip.saddr = tcp->dst;
 568                 pkt->ip.daddr = tcp->src;
 569                 pkt->tcp.source = cpu_to_be16(tcp->dst_port);
 570                 pkt->tcp.dest = cpu_to_be16(tcp->src_port);
 571                 break;
 572         default:
 573                 WARN_ON(1);
 574                 return;
 575         }
 576
 577         switch (ptype) {
 578         case MVM_TCP_TX_SYN:
 579                 /* firmware assumes 8 option bytes - 8 NOPs for now */
 580                 memset(pkt->data, 0x01, 8);
 581                 ip_tot_len += 8;
 582                 pkt->tcp.doff = (sizeof(struct tcphdr) + 8) / 4;
 583                 pkt->tcp.syn = 1;
 584                 break;
 585         case MVM_TCP_TX_DATA:
 586                 ip_tot_len += tcp->payload_len;
 587                 memcpy(pkt->data, tcp->payload, tcp->payload_len);
 588                 pkt->tcp.psh = 1;
 589                 pkt->tcp.ack = 1;
 590                 break;
 591         case MVM_TCP_TX_FIN:
 592                 pkt->tcp.fin = 1;
 593                 pkt->tcp.ack = 1;
 594                 break;
 595         case MVM_TCP_RX_SYNACK:
 596                 pkt->tcp.syn = 1;
 597                 pkt->tcp.ack = 1;
 598                 break;
 599         case MVM_TCP_RX_ACK:
 600                 pkt->tcp.ack = 1;
 601                 break;
 602         case MVM_TCP_RX_WAKE:
 603                 ip_tot_len += tcp->wake_len;
 604                 pkt->tcp.psh = 1;
 605                 pkt->tcp.ack = 1;
 606                 memcpy(pkt->data, tcp->wake_data, tcp->wake_len);
 607                 break;
 608         }
 609
 610         switch (ptype) {
 611         case MVM_TCP_TX_SYN:
 612         case MVM_TCP_TX_DATA:
 613         case MVM_TCP_TX_FIN:
 614                 pkt->ip.tot_len = cpu_to_be16(ip_tot_len);
 615                 pkt->ip.check = ip_fast_csum(&pkt->ip, pkt->ip.ihl);
 616                 break;
 617         case MVM_TCP_RX_WAKE:
 618                 for (i = 0; i < DIV_ROUND_UP(tcp->wake_len, 8); i++) {
 619                         u8 tmp = tcp->wake_mask[i];
 620                         mask[i + 6] |= tmp << 6;
 621                         if (i + 1 < DIV_ROUND_UP(tcp->wake_len, 8))
 622                                 mask[i + 7] = tmp >> 2;
 623                 }
 624                 /* fall through for ethernet/IP/TCP headers mask */
 625         case MVM_TCP_RX_SYNACK:
 626         case MVM_TCP_RX_ACK:
 627                 mask[0] = 0xff; /* match ethernet */
 628                 /*
 629                  * match ethernet, ip.version, ip.ihl
 630                  * the ip.ihl half byte is really masked out by firmware
 631                  */
 632                 mask[1] = 0x7f;
 633                 mask[2] = 0x80; /* match ip.protocol */
 634                 mask[3] = 0xfc; /* match ip.saddr, ip.daddr */
 635                 mask[4] = 0x3f; /* match ip.daddr, tcp.source, tcp.dest */
 636                 mask[5] = 0x80; /* match tcp flags */
 637                 /* leave rest (0 or set for MVM_TCP_RX_WAKE) */
 638                 break;
 639         };
 640
 641         *pseudo_hdr_csum = pseudo_hdr_check(ip_tot_len - sizeof(struct iphdr),
 642                                             pkt->ip.saddr, pkt->ip.daddr);
 643 }
 644
 645 static int iwl_mvm_send_remote_wake_cfg(struct iwl_mvm *mvm,
 646                                         struct ieee80211_vif *vif,
 647                                         struct cfg80211_wowlan_tcp *tcp)
 648 {
 649         struct iwl_wowlan_remote_wake_config *cfg;
 650         struct iwl_host_cmd cmd = {
 651                 .id = REMOTE_WAKE_CONFIG_CMD,
 652                 .len = { sizeof(*cfg), },
 653                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 654                 .flags = CMD_SYNC,
 655         };
 656         int ret;
 657
 658         if (!tcp)
 659                 return 0;
 660
 661         cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
 662         if (!cfg)
 663                 return -ENOMEM;
 664         cmd.data[0] = cfg;
 665
 666         cfg->max_syn_retries = 10;
 667         cfg->max_data_retries = 10;
 668         cfg->tcp_syn_ack_timeout = 1; /* seconds */
 669         cfg->tcp_ack_timeout = 1; /* seconds */
 670
 671         /* SYN (TX) */
 672         iwl_mvm_build_tcp_packet(
 673                 vif, tcp, cfg->syn_tx.data, NULL,
 674                 &cfg->syn_tx.info.tcp_pseudo_header_checksum,
 675                 MVM_TCP_TX_SYN);
 676         cfg->syn_tx.info.tcp_payload_length = 0;
 677
 678         /* SYN/ACK (RX) */
 679         iwl_mvm_build_tcp_packet(
 680                 vif, tcp, cfg->synack_rx.data, cfg->synack_rx.rx_mask,
 681                 &cfg->synack_rx.info.tcp_pseudo_header_checksum,
 682                 MVM_TCP_RX_SYNACK);
 683         cfg->synack_rx.info.tcp_payload_length = 0;
 684
 685         /* KEEPALIVE/ACK (TX) */
 686         iwl_mvm_build_tcp_packet(
 687                 vif, tcp, cfg->keepalive_tx.data, NULL,
 688                 &cfg->keepalive_tx.info.tcp_pseudo_header_checksum,
 689                 MVM_TCP_TX_DATA);
 690         cfg->keepalive_tx.info.tcp_payload_length =
 691                 cpu_to_le16(tcp->payload_len);
 692         cfg->sequence_number_offset = tcp->payload_seq.offset;
 693         /* length must be 0..4, the field is little endian */
 694         cfg->sequence_number_length = tcp->payload_seq.len;
 695         cfg->initial_sequence_number = cpu_to_le32(tcp->payload_seq.start);
 696         cfg->keepalive_interval = cpu_to_le16(tcp->data_interval);
 697         if (tcp->payload_tok.len) {
 698                 cfg->token_offset = tcp->payload_tok.offset;
 699                 cfg->token_length = tcp->payload_tok.len;
 700                 cfg->num_tokens =
 701                         cpu_to_le16(tcp->tokens_size % tcp->payload_tok.len);
 702                 memcpy(cfg->tokens, tcp->payload_tok.token_stream,
 703                        tcp->tokens_size);
 704         } else {
 705                 /* set tokens to max value to almost never run out */
 706                 cfg->num_tokens = cpu_to_le16(65535);
 707         }
 708
 709         /* ACK (RX) */
 710         iwl_mvm_build_tcp_packet(
 711                 vif, tcp, cfg->keepalive_ack_rx.data,
 712                 cfg->keepalive_ack_rx.rx_mask,
 713                 &cfg->keepalive_ack_rx.info.tcp_pseudo_header_checksum,
 714                 MVM_TCP_RX_ACK);
 715         cfg->keepalive_ack_rx.info.tcp_payload_length = 0;
 716
 717         /* WAKEUP (RX) */
 718         iwl_mvm_build_tcp_packet(
 719                 vif, tcp, cfg->wake_rx.data, cfg->wake_rx.rx_mask,
 720                 &cfg->wake_rx.info.tcp_pseudo_header_checksum,
 721                 MVM_TCP_RX_WAKE);
 722         cfg->wake_rx.info.tcp_payload_length =
 723                 cpu_to_le16(tcp->wake_len);
 724
 725         /* FIN */
 726         iwl_mvm_build_tcp_packet(
 727                 vif, tcp, cfg->fin_tx.data, NULL,
 728                 &cfg->fin_tx.info.tcp_pseudo_header_checksum,
 729                 MVM_TCP_TX_FIN);
 730         cfg->fin_tx.info.tcp_payload_length = 0;
 731
 732         ret = iwl_mvm_send_cmd(mvm, &cmd);
 733         kfree(cfg);
 734
 735         return ret;
 736 }
 737
 738 struct iwl_d3_iter_data {
 739         struct iwl_mvm *mvm;
 740         struct ieee80211_vif *vif;
 741         bool error;
 742 };
 743
 744 static void iwl_mvm_d3_iface_iterator(void *_data, u8 *mac,
 745                                       struct ieee80211_vif *vif)
 746 {
 747         struct iwl_d3_iter_data *data = _data;
 748         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 749
 750         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p)
 751                 return;
 752
 753         if (mvmvif->ap_sta_id == IWL_MVM_STATION_COUNT)
 754                 return;
 755
 756         if (data->vif) {
 757                 IWL_ERR(data->mvm, "More than one managed interface active!\n");
 758                 data->error = true;
 759                 return;
 760         }
 761
 762         data->vif = vif;
 763 }
 764
 765 static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 766                                 struct ieee80211_sta *ap_sta)
 767 {
 768         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 769         struct ieee80211_chanctx_conf *ctx;
 770         u8 chains_static, chains_dynamic;
 771         struct cfg80211_chan_def chandef;
 772         int ret, i;
 773         struct iwl_binding_cmd binding_cmd = {};
 774         struct iwl_time_quota_cmd quota_cmd = {};
 775         u32 status;
 776
 777         /* add back the PHY */
 778         if (WARN_ON(!mvmvif->phy_ctxt))
 779                 return -EINVAL;
 780
 781         rcu_read_lock();
 782         ctx = rcu_dereference(vif->chanctx_conf);
 783         if (WARN_ON(!ctx)) {
 784                 rcu_read_unlock();
 785                 return -EINVAL;
 786         }
 787         chandef = ctx->def;
 788         chains_static = ctx->rx_chains_static;
 789         chains_dynamic = ctx->rx_chains_dynamic;
 790         rcu_read_unlock();
 791
 792         ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 793                                    chains_static, chains_dynamic);
 794         if (ret)
 795                 return ret;
 796
 797         /* add back the MAC */
 798         mvmvif->uploaded = false;
 799
 800         if (WARN_ON(!vif->bss_conf.assoc))
 801                 return -EINVAL;
 802         /* hack */
 803         vif->bss_conf.assoc = false;
 804         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 805         vif->bss_conf.assoc = true;
 806         if (ret)
 807                 return ret;
 808
 809         /* add back binding - XXX refactor? */
 810         binding_cmd.id_and_color =
 811                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 812                                                 mvmvif->phy_ctxt->color));
 813         binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 814         binding_cmd.phy =
 815                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 816                                                 mvmvif->phy_ctxt->color));
 817         binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 818                                                               mvmvif->color));
 819         for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 820                 binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 821
 822         status = 0;
 823         ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 824                                           sizeof(binding_cmd), &binding_cmd,
 825                                           &status);
 826         if (ret) {
 827                 IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 828                 return ret;
 829         }
 830
 831         if (status) {
 832                 IWL_ERR(mvm, "Binding command failed: %u\n", status);
 833                 return -EIO;
 834         }
 835
 836         ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false);
 837         if (ret)
 838                 return ret;
 839         rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 840
 841         ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
 842         if (ret)
 843                 return ret;
 844
 845         /* and some quota */
 846         quota_cmd.quotas[0].id_and_color =
 847                 cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 848                                                 mvmvif->phy_ctxt->color));
 849         quota_cmd.quotas[0].quota = cpu_to_le32(100);
 850         quota_cmd.quotas[0].max_duration = cpu_to_le32(1000);
 851
 852         for (i = 1; i < MAX_BINDINGS; i++)
 853                 quota_cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 854
 855         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 856                                    sizeof(quota_cmd), &quota_cmd);
 857         if (ret)
 858                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 859
 860         return 0;
 861 }
 862
 863 static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 864                                        struct ieee80211_vif *vif)
 865 {
 866         struct iwl_host_cmd cmd = {
 867                 .id = NON_QOS_TX_COUNTER_CMD,
 868                 .flags = CMD_SYNC | CMD_WANT_SKB,
 869         };
 870         int err;
 871         u32 size;
 872
 873         err = iwl_mvm_send_cmd(mvm, &cmd);
 874         if (err)
 875                 return err;
 876
 877         size = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 878         size -= sizeof(cmd.resp_pkt->hdr);
 879         if (size != sizeof(__le32))
 880                 err = -EINVAL;
 881         else
 882                 err = le32_to_cpup((__le32 *)cmd.resp_pkt->data);
 883
 884         iwl_free_resp(&cmd);
 885         return err;
 886 }
 887
 888 static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 889                              struct cfg80211_wowlan *wowlan,
 890                              bool test)
 891 {
 892         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 893         struct iwl_d3_iter_data suspend_iter_data = {
 894                 .mvm = mvm,
 895         };
 896         struct ieee80211_vif *vif;
 897         struct iwl_mvm_vif *mvmvif;
 898         struct ieee80211_sta *ap_sta;
 899         struct iwl_mvm_sta *mvm_ap_sta;
 900         struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 901         struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 902         struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 903         struct iwl_d3_manager_config d3_cfg_cmd_data = {
 904                 /*
 905                  * Program the minimum sleep time to 10 seconds, as many
 906                  * platforms have issues processing a wakeup signal while
 907                  * still being in the process of suspending.
 908                  */
 909                 .min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
 910         };
 911         struct iwl_host_cmd d3_cfg_cmd = {
 912                 .id = D3_CONFIG_CMD,
 913                 .flags = CMD_SYNC | CMD_WANT_SKB,
 914                 .data[0] = &d3_cfg_cmd_data,
 915                 .len[0] = sizeof(d3_cfg_cmd_data),
 916         };
 917         struct wowlan_key_data key_data = {
 918                 .use_rsc_tsc = false,
 919                 .tkip = &tkip_cmd,
 920                 .use_tkip = false,
 921         };
 922         int ret, i;
 923         int len __maybe_unused;
 924         u8 old_aux_sta_id, old_ap_sta_id = IWL_MVM_STATION_COUNT;
 925
 926         if (!wowlan) {
 927                 /*
 928                  * mac80211 shouldn't get here, but for D3 test
 929                  * it doesn't warrant a warning
 930                  */
 931                 WARN_ON(!test);
 932                 return -EINVAL;
 933         }
 934
 935         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 936         if (!key_data.rsc_tsc)
 937                 return -ENOMEM;
 938
 939         mutex_lock(&mvm->mutex);
 940
 941         old_aux_sta_id = mvm->aux_sta.sta_id;
 942
 943         /* see if there's only a single BSS vif and it's associated */
 944         ieee80211_iterate_active_interfaces_atomic(
 945                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 946                 iwl_mvm_d3_iface_iterator, &suspend_iter_data);
 947
 948         if (suspend_iter_data.error || !suspend_iter_data.vif) {
 949                 ret = 1;
 950                 goto out_noreset;
 951         }
 952
 953         vif = suspend_iter_data.vif;
 954         mvmvif = iwl_mvm_vif_from_mac80211(vif);
 955
 956         ap_sta = rcu_dereference_protected(
 957                         mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
 958                         lockdep_is_held(&mvm->mutex));
 959         if (IS_ERR_OR_NULL(ap_sta)) {
 960                 ret = -EINVAL;
 961                 goto out_noreset;
 962         }
 963
 964         mvm_ap_sta = (struct iwl_mvm_sta *)ap_sta->drv_priv;
 965
 966         /* TODO: wowlan_config_cmd.wowlan_ba_teardown_tids */
 967
 968         wowlan_config_cmd.is_11n_connection = ap_sta->ht_cap.ht_supported;
 969
 970         /* Query the last used seqno and set it */
 971         ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 972         if (ret < 0)
 973                 goto out_noreset;
 974         wowlan_config_cmd.non_qos_seq = cpu_to_le16(ret);
 975
 976         /*
 977          * For QoS counters, we store the one to use next, so subtract 0x10
 978          * since the uCode will add 0x10 *before* using the value while we
 979          * increment after using the value (i.e. store the next value to use).
 980          */
 981         for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 982                 u16 seq = mvm_ap_sta->tid_data[i].seq_number;
 983                 seq -= 0x10;
 984                 wowlan_config_cmd.qos_seq[i] = cpu_to_le16(seq);
 985         }
 986
 987         if (wowlan->disconnect)
 988                 wowlan_config_cmd.wakeup_filter |=
 989                         cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 990                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 991         if (wowlan->magic_pkt)
 992                 wowlan_config_cmd.wakeup_filter |=
 993                         cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 994         if (wowlan->gtk_rekey_failure)
 995                 wowlan_config_cmd.wakeup_filter |=
 996                         cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 997         if (wowlan->eap_identity_req)
 998                 wowlan_config_cmd.wakeup_filter |=
 999                         cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
1000         if (wowlan->four_way_handshake)
1001                 wowlan_config_cmd.wakeup_filter |=
1002                         cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
1003         if (wowlan->n_patterns)
1004                 wowlan_config_cmd.wakeup_filter |=
1005                         cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
1006
1007         if (wowlan->rfkill_release)
1008                 wowlan_config_cmd.wakeup_filter |=
1009                         cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
1010
1011         if (wowlan->tcp) {
1012                 /*
1013                  * Set the "link change" (really "link lost") flag as well
1014                  * since that implies losing the TCP connection.
1015                  */
1016                 wowlan_config_cmd.wakeup_filter |=
1017                         cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
1018                                     IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
1019                                     IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
1020                                     IWL_WOWLAN_WAKEUP_LINK_CHANGE);
1021         }
1022
1023         iwl_mvm_cancel_scan(mvm);
1024
1025         iwl_trans_stop_device(mvm->trans);
1026
1027         /*
1028          * The D3 firmware still hardcodes the AP station ID for the
1029          * BSS we're associated with as 0. Store the real STA ID here
1030          * and assign 0. When we leave this function, we'll restore
1031          * the original value for the resume code.
1032          */
1033         old_ap_sta_id = mvm_ap_sta->sta_id;
1034         mvm_ap_sta->sta_id = 0;
1035         mvmvif->ap_sta_id = 0;
1036
1037         /*
1038          * Set the HW restart bit -- this is mostly true as we're
1039          * going to load new firmware and reprogram that, though
1040          * the reprogramming is going to be manual to avoid adding
1041          * all the MACs that aren't support.
1042          * We don't have to clear up everything though because the
1043          * reprogramming is manual. When we resume, we'll actually
1044          * go through a proper restart sequence again to switch
1045          * back to the runtime firmware image.
1046          */
1047         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1048
1049         /* We reprogram keys and shouldn't allocate new key indices */
1050         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1051
1052         mvm->ptk_ivlen = 0;
1053         mvm->ptk_icvlen = 0;
1054         mvm->ptk_ivlen = 0;
1055         mvm->ptk_icvlen = 0;
1056
1057         /*
1058          * The D3 firmware still hardcodes the AP station ID for the
1059          * BSS we're associated with as 0. As a result, we have to move
1060          * the auxiliary station to ID 1 so the ID 0 remains free for
1061          * the AP station for later.
1062          * We set the sta_id to 1 here, and reset it to its previous
1063          * value (that we stored above) later.
1064          */
1065         mvm->aux_sta.sta_id = 1;
1066
1067         ret = iwl_mvm_load_d3_fw(mvm);
1068         if (ret)
1069                 goto out;
1070
1071         ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
1072         if (ret)
1073                 goto out;
1074
1075         if (!iwlwifi_mod_params.sw_crypto) {
1076                 /*
1077                  * This needs to be unlocked due to lock ordering
1078                  * constraints. Since we're in the suspend path
1079                  * that isn't really a problem though.
1080                  */
1081                 mutex_unlock(&mvm->mutex);
1082                 ieee80211_iter_keys(mvm->hw, vif,
1083                                     iwl_mvm_wowlan_program_keys,
1084                                     &key_data);
1085                 mutex_lock(&mvm->mutex);
1086                 if (key_data.error) {
1087                         ret = -EIO;
1088                         goto out;
1089                 }
1090
1091                 if (key_data.use_rsc_tsc) {
1092                         struct iwl_host_cmd rsc_tsc_cmd = {
1093                                 .id = WOWLAN_TSC_RSC_PARAM,
1094                                 .flags = CMD_SYNC,
1095                                 .data[0] = key_data.rsc_tsc,
1096                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1097                                 .len[0] = sizeof(*key_data.rsc_tsc),
1098                         };
1099
1100                         ret = iwl_mvm_send_cmd(mvm, &rsc_tsc_cmd);
1101                         if (ret)
1102                                 goto out;
1103                 }
1104
1105                 if (key_data.use_tkip) {
1106                         ret = iwl_mvm_send_cmd_pdu(mvm,
1107                                                    WOWLAN_TKIP_PARAM,
1108                                                    CMD_SYNC, sizeof(tkip_cmd),
1109                                                    &tkip_cmd);
1110                         if (ret)
1111                                 goto out;
1112                 }
1113
1114                 if (mvmvif->rekey_data.valid) {
1115                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
1116                         memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
1117                                NL80211_KCK_LEN);
1118                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
1119                         memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
1120                                NL80211_KEK_LEN);
1121                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
1122                         kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
1123
1124                         ret = iwl_mvm_send_cmd_pdu(mvm,
1125                                                    WOWLAN_KEK_KCK_MATERIAL,
1126                                                    CMD_SYNC,
1127                                                    sizeof(kek_kck_cmd),
1128                                                    &kek_kck_cmd);
1129                         if (ret)
1130                                 goto out;
1131                 }
1132         }
1133
1134         ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION,
1135                                    CMD_SYNC, sizeof(wowlan_config_cmd),
1136                                    &wowlan_config_cmd);
1137         if (ret)
1138                 goto out;
1139
1140         ret = iwl_mvm_send_patterns(mvm, wowlan);
1141         if (ret)
1142                 goto out;
1143
1144         ret = iwl_mvm_send_proto_offload(mvm, vif);
1145         if (ret)
1146                 goto out;
1147
1148         ret = iwl_mvm_send_remote_wake_cfg(mvm, vif, wowlan->tcp);
1149         if (ret)
1150                 goto out;
1151
1152         ret = iwl_mvm_power_update_mode(mvm, vif);
1153         if (ret)
1154                 goto out;
1155
1156 #ifdef CONFIG_IWLWIFI_DEBUGFS
1157         if (mvm->d3_wake_sysassert)
1158                 d3_cfg_cmd_data.wakeup_flags |=
1159                         cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1160 #endif
1161
1162         /* must be last -- this switches firmware state */
1163         ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1164         if (ret)
1165                 goto out;
1166 #ifdef CONFIG_IWLWIFI_DEBUGFS
1167         len = le32_to_cpu(d3_cfg_cmd.resp_pkt->len_n_flags) &
1168                 FH_RSCSR_FRAME_SIZE_MSK;
1169         if (len >= sizeof(u32) * 2) {
1170                 mvm->d3_test_pme_ptr =
1171                         le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1172         } else if (test) {
1173                 /* in test mode we require the pointer */
1174                 ret = -EIO;
1175                 goto out;
1176         }
1177 #endif
1178         iwl_free_resp(&d3_cfg_cmd);
1179
1180         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1181
1182         iwl_trans_d3_suspend(mvm->trans, test);
1183  out:
1184         mvm->aux_sta.sta_id = old_aux_sta_id;
1185         mvm_ap_sta->sta_id = old_ap_sta_id;
1186         mvmvif->ap_sta_id = old_ap_sta_id;
1187  out_noreset:
1188         kfree(key_data.rsc_tsc);
1189         if (ret < 0)
1190                 ieee80211_restart_hw(mvm->hw);
1191
1192         mutex_unlock(&mvm->mutex);
1193
1194         return ret;
1195 }
1196
1197 int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1198 {
1199         return __iwl_mvm_suspend(hw, wowlan, false);
1200 }
1201
1202 static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1203                                           struct ieee80211_vif *vif,
1204                                           struct iwl_wowlan_status *status)
1205 {
1206         struct sk_buff *pkt = NULL;
1207         struct cfg80211_wowlan_wakeup wakeup = {
1208                 .pattern_idx = -1,
1209         };
1210         struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1211         u32 reasons = le32_to_cpu(status->wakeup_reasons);
1212
1213         if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1214                 wakeup_report = NULL;
1215                 goto report;
1216         }
1217
1218         if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1219                 wakeup.magic_pkt = true;
1220
1221         if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1222                 wakeup.pattern_idx =
1223                         le16_to_cpu(status->pattern_number);
1224
1225         if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1226                        IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1227                 wakeup.disconnect = true;
1228
1229         if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1230                 wakeup.gtk_rekey_failure = true;
1231
1232         if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1233                 wakeup.rfkill_release = true;
1234
1235         if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1236                 wakeup.eap_identity_req = true;
1237
1238         if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1239                 wakeup.four_way_handshake = true;
1240
1241         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1242                 wakeup.tcp_connlost = true;
1243
1244         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1245                 wakeup.tcp_nomoretokens = true;
1246
1247         if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1248                 wakeup.tcp_match = true;
1249
1250         if (status->wake_packet_bufsize) {
1251                 int pktsize = le32_to_cpu(status->wake_packet_bufsize);
1252                 int pktlen = le32_to_cpu(status->wake_packet_length);
1253                 const u8 *pktdata = status->wake_packet;
1254                 struct ieee80211_hdr *hdr = (void *)pktdata;
1255                 int truncated = pktlen - pktsize;
1256
1257                 /* this would be a firmware bug */
1258                 if (WARN_ON_ONCE(truncated < 0))
1259                         truncated = 0;
1260
1261                 if (ieee80211_is_data(hdr->frame_control)) {
1262                         int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1263                         int ivlen = 0, icvlen = 4; /* also FCS */
1264
1265                         pkt = alloc_skb(pktsize, GFP_KERNEL);
1266                         if (!pkt)
1267                                 goto report;
1268
1269                         memcpy(skb_put(pkt, hdrlen), pktdata, hdrlen);
1270                         pktdata += hdrlen;
1271                         pktsize -= hdrlen;
1272
1273                         if (ieee80211_has_protected(hdr->frame_control)) {
1274                                 /*
1275                                  * This is unlocked and using gtk_i(c)vlen,
1276                                  * but since everything is under RTNL still
1277                                  * that's not really a problem - changing
1278                                  * it would be difficult.
1279                                  */
1280                                 if (is_multicast_ether_addr(hdr->addr1)) {
1281                                         ivlen = mvm->gtk_ivlen;
1282                                         icvlen += mvm->gtk_icvlen;
1283                                 } else {
1284                                         ivlen = mvm->ptk_ivlen;
1285                                         icvlen += mvm->ptk_icvlen;
1286                                 }
1287                         }
1288
1289                         /* if truncated, FCS/ICV is (partially) gone */
1290                         if (truncated >= icvlen) {
1291                                 icvlen = 0;
1292                                 truncated -= icvlen;
1293                         } else {
1294                                 icvlen -= truncated;
1295                                 truncated = 0;
1296                         }
1297
1298                         pktsize -= ivlen + icvlen;
1299                         pktdata += ivlen;
1300
1301                         memcpy(skb_put(pkt, pktsize), pktdata, pktsize);
1302
1303                         if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1304                                 goto report;
1305                         wakeup.packet = pkt->data;
1306                         wakeup.packet_present_len = pkt->len;
1307                         wakeup.packet_len = pkt->len - truncated;
1308                         wakeup.packet_80211 = false;
1309                 } else {
1310                         int fcslen = 4;
1311
1312                         if (truncated >= 4) {
1313                                 truncated -= 4;
1314                                 fcslen = 0;
1315                         } else {
1316                                 fcslen -= truncated;
1317                                 truncated = 0;
1318                         }
1319                         pktsize -= fcslen;
1320                         wakeup.packet = status->wake_packet;
1321                         wakeup.packet_present_len = pktsize;
1322                         wakeup.packet_len = pktlen - truncated;
1323                         wakeup.packet_80211 = true;
1324                 }
1325         }
1326
1327  report:
1328         ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1329         kfree_skb(pkt);
1330 }
1331
1332 /* releases the MVM mutex */
1333 static void iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1334                                          struct ieee80211_vif *vif)
1335 {
1336         u32 base = mvm->error_event_table;
1337         struct error_table_start {
1338                 /* cf. struct iwl_error_event_table */
1339                 u32 valid;
1340                 u32 error_id;
1341         } err_info;
1342         struct iwl_host_cmd cmd = {
1343                 .id = WOWLAN_GET_STATUSES,
1344                 .flags = CMD_SYNC | CMD_WANT_SKB,
1345         };
1346         struct iwl_wowlan_status *status;
1347         int ret, len;
1348
1349         iwl_trans_read_mem_bytes(mvm->trans, base,
1350                                  &err_info, sizeof(err_info));
1351
1352         if (err_info.valid) {
1353                 IWL_INFO(mvm, "error table is valid (%d)\n",
1354                          err_info.valid);
1355                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1356                         struct cfg80211_wowlan_wakeup wakeup = {
1357                                 .rfkill_release = true,
1358                         };
1359                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
1360                                                        GFP_KERNEL);
1361                 }
1362                 goto out_unlock;
1363         }
1364
1365         /* only for tracing for now */
1366         ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, CMD_SYNC, 0, NULL);
1367         if (ret)
1368                 IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1369
1370         ret = iwl_mvm_send_cmd(mvm, &cmd);
1371         if (ret) {
1372                 IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1373                 goto out_unlock;
1374         }
1375
1376         /* RF-kill already asserted again... */
1377         if (!cmd.resp_pkt)
1378                 goto out_unlock;
1379
1380         len = le32_to_cpu(cmd.resp_pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1381         if (len - sizeof(struct iwl_cmd_header) < sizeof(*status)) {
1382                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1383                 goto out_free_resp;
1384         }
1385
1386         status = (void *)cmd.resp_pkt->data;
1387
1388         if (len - sizeof(struct iwl_cmd_header) !=
1389             sizeof(*status) +
1390             ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4)) {
1391                 IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1392                 goto out_free_resp;
1393         }
1394
1395         /* now we have all the data we need, unlock to avoid mac80211 issues */
1396         mutex_unlock(&mvm->mutex);
1397
1398         iwl_mvm_report_wakeup_reasons(mvm, vif, status);
1399         iwl_free_resp(&cmd);
1400         return;
1401
1402  out_free_resp:
1403         iwl_free_resp(&cmd);
1404  out_unlock:
1405         mutex_unlock(&mvm->mutex);
1406 }
1407
1408 static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1409 {
1410 #ifdef CONFIG_IWLWIFI_DEBUGFS
1411         const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1412         u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1413         u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1414
1415         if (!mvm->store_d3_resume_sram)
1416                 return;
1417
1418         if (!mvm->d3_resume_sram) {
1419                 mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1420                 if (!mvm->d3_resume_sram)
1421                         return;
1422         }
1423
1424         iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1425 #endif
1426 }
1427
1428 static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1429 {
1430         struct iwl_d3_iter_data resume_iter_data = {
1431                 .mvm = mvm,
1432         };
1433         struct ieee80211_vif *vif = NULL;
1434         int ret;
1435         enum iwl_d3_status d3_status;
1436
1437         mutex_lock(&mvm->mutex);
1438
1439         /* get the BSS vif pointer again */
1440         ieee80211_iterate_active_interfaces_atomic(
1441                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1442                 iwl_mvm_d3_iface_iterator, &resume_iter_data);
1443
1444         if (WARN_ON(resume_iter_data.error || !resume_iter_data.vif))
1445                 goto out_unlock;
1446
1447         vif = resume_iter_data.vif;
1448
1449         ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test);
1450         if (ret)
1451                 goto out_unlock;
1452
1453         if (d3_status != IWL_D3_STATUS_ALIVE) {
1454                 IWL_INFO(mvm, "Device was reset during suspend\n");
1455                 goto out_unlock;
1456         }
1457
1458         /* query SRAM first in case we want event logging */
1459         iwl_mvm_read_d3_sram(mvm);
1460
1461         iwl_mvm_query_wakeup_reasons(mvm, vif);
1462         /* has unlocked the mutex, so skip that */
1463         goto out;
1464
1465  out_unlock:
1466         mutex_unlock(&mvm->mutex);
1467
1468  out:
1469         if (!test && vif)
1470                 ieee80211_resume_disconnect(vif);
1471
1472         /* return 1 to reconfigure the device */
1473         set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1474         return 1;
1475 }
1476
1477 int iwl_mvm_resume(struct ieee80211_hw *hw)
1478 {
1479         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1480
1481         return __iwl_mvm_resume(mvm, false);
1482 }
1483
1484 void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
1485 {
1486         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1487
1488         device_set_wakeup_enable(mvm->trans->dev, enabled);
1489 }
1490
1491 #ifdef CONFIG_IWLWIFI_DEBUGFS
1492 static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
1493 {
1494         struct iwl_mvm *mvm = inode->i_private;
1495         int err;
1496
1497         if (mvm->d3_test_active)
1498                 return -EBUSY;
1499
1500         file->private_data = inode->i_private;
1501
1502         ieee80211_stop_queues(mvm->hw);
1503         synchronize_net();
1504
1505         /* start pseudo D3 */
1506         rtnl_lock();
1507         err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
1508         rtnl_unlock();
1509         if (err > 0)
1510                 err = -EINVAL;
1511         if (err) {
1512                 ieee80211_wake_queues(mvm->hw);
1513                 return err;
1514         }
1515         mvm->d3_test_active = true;
1516         return 0;
1517 }
1518
1519 static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
1520                                     size_t count, loff_t *ppos)
1521 {
1522         struct iwl_mvm *mvm = file->private_data;
1523         u32 pme_asserted;
1524
1525         while (true) {
1526                 pme_asserted = iwl_trans_read_mem32(mvm->trans,
1527                                                     mvm->d3_test_pme_ptr);
1528                 if (pme_asserted)
1529                         break;
1530                 if (msleep_interruptible(100))
1531                         break;
1532         }
1533
1534         return 0;
1535 }
1536
1537 static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
1538                                               struct ieee80211_vif *vif)
1539 {
1540         if (vif->type == NL80211_IFTYPE_STATION)
1541                 ieee80211_connection_loss(vif);
1542 }
1543
1544 static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
1545 {
1546         struct iwl_mvm *mvm = inode->i_private;
1547         int remaining_time = 10;
1548
1549         mvm->d3_test_active = false;
1550         __iwl_mvm_resume(mvm, true);
1551         iwl_abort_notification_waits(&mvm->notif_wait);
1552         ieee80211_restart_hw(mvm->hw);
1553
1554         /* wait for restart and disconnect all interfaces */
1555         while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1556                remaining_time > 0) {
1557                 remaining_time--;
1558                 msleep(1000);
1559         }
1560
1561         if (remaining_time == 0)
1562                 IWL_ERR(mvm, "Timed out waiting for HW restart to finish!\n");
1563
1564         ieee80211_iterate_active_interfaces_atomic(
1565                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1566                 iwl_mvm_d3_test_disconn_work_iter, NULL);
1567
1568         ieee80211_wake_queues(mvm->hw);
1569
1570         return 0;
1571 }
1572
1573 const struct file_operations iwl_dbgfs_d3_test_ops = {
1574         .llseek = no_llseek,
1575         .open = iwl_mvm_d3_test_open,
1576         .read = iwl_mvm_d3_test_read,
1577         .release = iwl_mvm_d3_test_release,
1578 };
1579 #endif