1/******************************************************************************
   2 *
   3 * This file is provided under a dual BSD/GPLv2 license.  When using or
   4 * redistributing this file, you may do so under either license.
   5 *
   6 * GPL LICENSE SUMMARY
   7 *
   8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11 *
  12 * This program is free software; you can redistribute it and/or modify
  13 * it under the terms of version 2 of the GNU General Public License as
  14 * published by the Free Software Foundation.
  15 *
  16 * This program is distributed in the hope that it will be useful, but
  17 * WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19 * General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24 * USA
  25 *
  26 * The full GNU General Public License is included in this distribution
  27 * in the file called COPYING.
  28 *
  29 * Contact Information:
  30 *  Intel Linux Wireless <linuxwifi@intel.com>
  31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32 *
  33 * BSD LICENSE
  34 *
  35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  38 * All rights reserved.
  39 *
  40 * Redistribution and use in source and binary forms, with or without
  41 * modification, are permitted provided that the following conditions
  42 * are met:
  43 *
  44 *  * Redistributions of source code must retain the above copyright
  45 *    notice, this list of conditions and the following disclaimer.
  46 *  * Redistributions in binary form must reproduce the above copyright
  47 *    notice, this list of conditions and the following disclaimer in
  48 *    the documentation and/or other materials provided with the
  49 *    distribution.
  50 *  * Neither the name Intel Corporation nor the names of its
  51 *    contributors may be used to endorse or promote products derived
  52 *    from this software without specific prior written permission.
  53 *
  54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  65 *
  66 *****************************************************************************/
  67
  68#include <linux/etherdevice.h>
  69#include <linux/ip.h>
  70#include <linux/fs.h>
  71#include <net/cfg80211.h>
  72#include <net/ipv6.h>
  73#include <net/tcp.h>
  74#include <net/addrconf.h>
  75#include "iwl-modparams.h"
  76#include "fw-api.h"
  77#include "mvm.h"
  78
  79void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
  80			    struct ieee80211_vif *vif,
  81			    struct cfg80211_gtk_rekey_data *data)
  82{
  83	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
  84	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  85
  86	if (iwlwifi_mod_params.swcrypto)
  87		return;
  88
  89	mutex_lock(&mvm->mutex);
  90
  91	memcpy(mvmvif->rekey_data.kek, data->kek, NL80211_KEK_LEN);
  92	memcpy(mvmvif->rekey_data.kck, data->kck, NL80211_KCK_LEN);
  93	mvmvif->rekey_data.replay_ctr =
  94		cpu_to_le64(be64_to_cpup((__be64 *)data->replay_ctr));
  95	mvmvif->rekey_data.valid = true;
  96
  97	mutex_unlock(&mvm->mutex);
  98}
  99
 100#if IS_ENABLED(CONFIG_IPV6)
 101void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
 102			      struct ieee80211_vif *vif,
 103			      struct inet6_dev *idev)
 104{
 105	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 106	struct inet6_ifaddr *ifa;
 107	int idx = 0;
 108
 109	memset(mvmvif->tentative_addrs, 0, sizeof(mvmvif->tentative_addrs));
 110
 111	read_lock_bh(&idev->lock);
 112	list_for_each_entry(ifa, &idev->addr_list, if_list) {
 113		mvmvif->target_ipv6_addrs[idx] = ifa->addr;
 114		if (ifa->flags & IFA_F_TENTATIVE)
 115			__set_bit(idx, mvmvif->tentative_addrs);
 116		idx++;
 117		if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX)
 118			break;
 119	}
 120	read_unlock_bh(&idev->lock);
 121
 122	mvmvif->num_target_ipv6_addrs = idx;
 123}
 124#endif
 125
 126void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
 127				     struct ieee80211_vif *vif, int idx)
 128{
 129	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 130
 131	mvmvif->tx_key_idx = idx;
 132}
 133
 134static void iwl_mvm_convert_p1k(u16 *p1k, __le16 *out)
 135{
 136	int i;
 137
 138	for (i = 0; i < IWL_P1K_SIZE; i++)
 139		out[i] = cpu_to_le16(p1k[i]);
 140}
 141
 142static const u8 *iwl_mvm_find_max_pn(struct ieee80211_key_conf *key,
 143				     struct iwl_mvm_key_pn *ptk_pn,
 144				     struct ieee80211_key_seq *seq,
 145				     int tid, int queues)
 146{
 147	const u8 *ret = seq->ccmp.pn;
 148	int i;
 149
 150	/* get the PN from mac80211, used on the default queue */
 151	ieee80211_get_key_rx_seq(key, tid, seq);
 152
 153	/* and use the internal data for the other queues */
 154	for (i = 1; i < queues; i++) {
 155		const u8 *tmp = ptk_pn->q[i].pn[tid];
 156
 157		if (memcmp(ret, tmp, IEEE80211_CCMP_PN_LEN) <= 0)
 158			ret = tmp;
 159	}
 160
 161	return ret;
 162}
 163
 164struct wowlan_key_data {
 165	struct iwl_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 166	struct iwl_wowlan_tkip_params_cmd *tkip;
 167	bool error, use_rsc_tsc, use_tkip, configure_keys;
 168	int wep_key_idx;
 169};
 170
 171static void iwl_mvm_wowlan_program_keys(struct ieee80211_hw *hw,
 172					struct ieee80211_vif *vif,
 173					struct ieee80211_sta *sta,
 174					struct ieee80211_key_conf *key,
 175					void *_data)
 176{
 177	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 178	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 179	struct wowlan_key_data *data = _data;
 180	struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 181	struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 182	struct iwl_p1k_cache *rx_p1ks;
 183	u8 *rx_mic_key;
 184	struct ieee80211_key_seq seq;
 185	u32 cur_rx_iv32 = 0;
 186	u16 p1k[IWL_P1K_SIZE];
 187	int ret, i;
 188
 189	switch (key->cipher) {
 190	case WLAN_CIPHER_SUITE_WEP40:
 191	case WLAN_CIPHER_SUITE_WEP104: { /* hack it for now */
 192		struct {
 193			struct iwl_mvm_wep_key_cmd wep_key_cmd;
 194			struct iwl_mvm_wep_key wep_key;
 195		} __packed wkc = {
 196			.wep_key_cmd.mac_id_n_color =
 197				cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 198								mvmvif->color)),
 199			.wep_key_cmd.num_keys = 1,
 200			/* firmware sets STA_KEY_FLG_WEP_13BYTES */
 201			.wep_key_cmd.decryption_type = STA_KEY_FLG_WEP,
 202			.wep_key.key_index = key->keyidx,
 203			.wep_key.key_size = key->keylen,
 204		};
 205
 206		/*
 207		 * This will fail -- the key functions don't set support
 208		 * pairwise WEP keys. However, that's better than silently
 209		 * failing WoWLAN. Or maybe not?
 210		 */
 211		if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 212			break;
 213
 214		memcpy(&wkc.wep_key.key[3], key->key, key->keylen);
 215		if (key->keyidx == mvmvif->tx_key_idx) {
 216			/* TX key must be at offset 0 */
 217			wkc.wep_key.key_offset = 0;
 218		} else {
 219			/* others start at 1 */
 220			data->wep_key_idx++;
 221			wkc.wep_key.key_offset = data->wep_key_idx;
 222		}
 223
 224		if (data->configure_keys) {
 225			mutex_lock(&mvm->mutex);
 226			ret = iwl_mvm_send_cmd_pdu(mvm, WEP_KEY, 0,
 227						   sizeof(wkc), &wkc);
 228			data->error = ret != 0;
 229
 230			mvm->ptk_ivlen = key->iv_len;
 231			mvm->ptk_icvlen = key->icv_len;
 232			mvm->gtk_ivlen = key->iv_len;
 233			mvm->gtk_icvlen = key->icv_len;
 234			mutex_unlock(&mvm->mutex);
 235		}
 236
 237		/* don't upload key again */
 238		return;
 239	}
 240	default:
 241		data->error = true;
 242		return;
 243	case WLAN_CIPHER_SUITE_AES_CMAC:
 244		/*
 245		 * Ignore CMAC keys -- the WoWLAN firmware doesn't support them
 246		 * but we also shouldn't abort suspend due to that. It does have
 247		 * support for the IGTK key renewal, but doesn't really use the
 248		 * IGTK for anything. This means we could spuriously wake up or
 249		 * be deauthenticated, but that was considered acceptable.
 250		 */
 251		return;
 252	case WLAN_CIPHER_SUITE_TKIP:
 253		if (sta) {
 254			u64 pn64;
 255
 256			tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 257			tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 258
 259			rx_p1ks = data->tkip->rx_uni;
 260
 261			pn64 = atomic64_read(&key->tx_pn);
 262			tkip_tx_sc->iv16 = cpu_to_le16(TKIP_PN_TO_IV16(pn64));
 263			tkip_tx_sc->iv32 = cpu_to_le32(TKIP_PN_TO_IV32(pn64));
 264
 265			ieee80211_get_tkip_p1k_iv(key, TKIP_PN_TO_IV32(pn64),
 266						  p1k);
 267			iwl_mvm_convert_p1k(p1k, data->tkip->tx.p1k);
 268
 269			memcpy(data->tkip->mic_keys.tx,
 270			       &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 271			       IWL_MIC_KEY_SIZE);
 272
 273			rx_mic_key = data->tkip->mic_keys.rx_unicast;
 274		} else {
 275			tkip_sc =
 276				data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 277			rx_p1ks = data->tkip->rx_multi;
 278			rx_mic_key = data->tkip->mic_keys.rx_mcast;
 279		}
 280
 281		/*
 282		 * For non-QoS this relies on the fact that both the uCode and
 283		 * mac80211 use TID 0 (as they need to to avoid replay attacks)
 284		 * for checking the IV in the frames.
 285		 */
 286		for (i = 0; i < IWL_NUM_RSC; i++) {
 287			ieee80211_get_key_rx_seq(key, i, &seq);
 288			tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 289			tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 290			/* wrapping isn't allowed, AP must rekey */
 291			if (seq.tkip.iv32 > cur_rx_iv32)
 292				cur_rx_iv32 = seq.tkip.iv32;
 293		}
 294
 295		ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 296					  cur_rx_iv32, p1k);
 297		iwl_mvm_convert_p1k(p1k, rx_p1ks[0].p1k);
 298		ieee80211_get_tkip_rx_p1k(key, vif->bss_conf.bssid,
 299					  cur_rx_iv32 + 1, p1k);
 300		iwl_mvm_convert_p1k(p1k, rx_p1ks[1].p1k);
 301
 302		memcpy(rx_mic_key,
 303		       &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 304		       IWL_MIC_KEY_SIZE);
 305
 306		data->use_tkip = true;
 307		data->use_rsc_tsc = true;
 308		break;
 309	case WLAN_CIPHER_SUITE_CCMP:
 310		if (sta) {
 311			u64 pn64;
 312
 313			aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 314			aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 315
 316			pn64 = atomic64_read(&key->tx_pn);
 317			aes_tx_sc->pn = cpu_to_le64(pn64);
 318		} else {
 319			aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 320		}
 321
 322		/*
 323		 * For non-QoS this relies on the fact that both the uCode and
 324		 * mac80211/our RX code use TID 0 for checking the PN.
 325		 */
 326		if (sta && iwl_mvm_has_new_rx_api(mvm)) {
 327			struct iwl_mvm_sta *mvmsta;
 328			struct iwl_mvm_key_pn *ptk_pn;
 329			const u8 *pn;
 330
 331			mvmsta = iwl_mvm_sta_from_mac80211(sta);
 332			ptk_pn = rcu_dereference_protected(
 333						mvmsta->ptk_pn[key->keyidx],
 334						lockdep_is_held(&mvm->mutex));
 335			if (WARN_ON(!ptk_pn))
 336				break;
 337
 338			for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
 339				pn = iwl_mvm_find_max_pn(key, ptk_pn, &seq, i,
 340						mvm->trans->num_rx_queues);
 341				aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
 342							   ((u64)pn[4] << 8) |
 343							   ((u64)pn[3] << 16) |
 344							   ((u64)pn[2] << 24) |
 345							   ((u64)pn[1] << 32) |
 346							   ((u64)pn[0] << 40));
 347			}
 348		} else {
 349			for (i = 0; i < IWL_NUM_RSC; i++) {
 350				u8 *pn = seq.ccmp.pn;
 351
 352				ieee80211_get_key_rx_seq(key, i, &seq);
 353				aes_sc[i].pn = cpu_to_le64((u64)pn[5] |
 354							   ((u64)pn[4] << 8) |
 355							   ((u64)pn[3] << 16) |
 356							   ((u64)pn[2] << 24) |
 357							   ((u64)pn[1] << 32) |
 358							   ((u64)pn[0] << 40));
 359			}
 360		}
 361		data->use_rsc_tsc = true;
 362		break;
 363	}
 364
 365	if (data->configure_keys) {
 366		mutex_lock(&mvm->mutex);
 367		/*
 368		 * The D3 firmware hardcodes the key offset 0 as the key it
 369		 * uses to transmit packets to the AP, i.e. the PTK.
 370		 */
 371		if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) {
 372			mvm->ptk_ivlen = key->iv_len;
 373			mvm->ptk_icvlen = key->icv_len;
 374			ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 0);
 375		} else {
 376			/*
 377			 * firmware only supports TSC/RSC for a single key,
 378			 * so if there are multiple keep overwriting them
 379			 * with new ones -- this relies on mac80211 doing
 380			 * list_add_tail().
 381			 */
 382			mvm->gtk_ivlen = key->iv_len;
 383			mvm->gtk_icvlen = key->icv_len;
 384			ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, 1);
 385		}
 386		mutex_unlock(&mvm->mutex);
 387		data->error = ret != 0;
 388	}
 389}
 390
 391static int iwl_mvm_send_patterns(struct iwl_mvm *mvm,
 392				 struct cfg80211_wowlan *wowlan)
 393{
 394	struct iwl_wowlan_patterns_cmd *pattern_cmd;
 395	struct iwl_host_cmd cmd = {
 396		.id = WOWLAN_PATTERNS,
 397		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 398	};
 399	int i, err;
 400
 401	if (!wowlan->n_patterns)
 402		return 0;
 403
 404	cmd.len[0] = sizeof(*pattern_cmd) +
 405		wowlan->n_patterns * sizeof(struct iwl_wowlan_pattern);
 406
 407	pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 408	if (!pattern_cmd)
 409		return -ENOMEM;
 410
 411	pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 412
 413	for (i = 0; i < wowlan->n_patterns; i++) {
 414		int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 415
 416		memcpy(&pattern_cmd->patterns[i].mask,
 417		       wowlan->patterns[i].mask, mask_len);
 418		memcpy(&pattern_cmd->patterns[i].pattern,
 419		       wowlan->patterns[i].pattern,
 420		       wowlan->patterns[i].pattern_len);
 421		pattern_cmd->patterns[i].mask_size = mask_len;
 422		pattern_cmd->patterns[i].pattern_size =
 423			wowlan->patterns[i].pattern_len;
 424	}
 425
 426	cmd.data[0] = pattern_cmd;
 427	err = iwl_mvm_send_cmd(mvm, &cmd);
 428	kfree(pattern_cmd);
 429	return err;
 430}
 431
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 432static int iwl_mvm_d3_reprogram(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 433				struct ieee80211_sta *ap_sta)
 434{
 435	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 436	struct ieee80211_chanctx_conf *ctx;
 437	u8 chains_static, chains_dynamic;
 438	struct cfg80211_chan_def chandef;
 439	int ret, i;
 440	struct iwl_binding_cmd binding_cmd = {};
 441	struct iwl_time_quota_cmd quota_cmd = {};
 442	struct iwl_time_quota_data *quota;
 443	u32 status;
 444	int size;
 445
 446	if (fw_has_capa(&mvm->fw->ucode_capa,
 447			IWL_UCODE_TLV_CAPA_BINDING_CDB_SUPPORT)) {
 448		size = sizeof(binding_cmd);
 449		if (mvmvif->phy_ctxt->channel->band == NL80211_BAND_2GHZ ||
 450		    !iwl_mvm_is_cdb_supported(mvm))
 451			binding_cmd.lmac_id = cpu_to_le32(IWL_LMAC_24G_INDEX);
 452		else
 453			binding_cmd.lmac_id = cpu_to_le32(IWL_LMAC_5G_INDEX);
 454	} else {
 455		size = IWL_BINDING_CMD_SIZE_V1;
 456	}
 457
 458	/* add back the PHY */
 459	if (WARN_ON(!mvmvif->phy_ctxt))
 460		return -EINVAL;
 461
 462	rcu_read_lock();
 463	ctx = rcu_dereference(vif->chanctx_conf);
 464	if (WARN_ON(!ctx)) {
 465		rcu_read_unlock();
 466		return -EINVAL;
 467	}
 468	chandef = ctx->def;
 469	chains_static = ctx->rx_chains_static;
 470	chains_dynamic = ctx->rx_chains_dynamic;
 471	rcu_read_unlock();
 472
 473	ret = iwl_mvm_phy_ctxt_add(mvm, mvmvif->phy_ctxt, &chandef,
 474				   chains_static, chains_dynamic);
 475	if (ret)
 476		return ret;
 477
 478	/* add back the MAC */
 479	mvmvif->uploaded = false;
 480
 481	if (WARN_ON(!vif->bss_conf.assoc))
 482		return -EINVAL;
 483
 484	ret = iwl_mvm_mac_ctxt_add(mvm, vif);
 485	if (ret)
 486		return ret;
 487
 488	/* add back binding - XXX refactor? */
 489	binding_cmd.id_and_color =
 490		cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 491						mvmvif->phy_ctxt->color));
 492	binding_cmd.action = cpu_to_le32(FW_CTXT_ACTION_ADD);
 493	binding_cmd.phy =
 494		cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 495						mvmvif->phy_ctxt->color));
 496	binding_cmd.macs[0] = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 497							      mvmvif->color));
 498	for (i = 1; i < MAX_MACS_IN_BINDING; i++)
 499		binding_cmd.macs[i] = cpu_to_le32(FW_CTXT_INVALID);
 500
 501	status = 0;
 502	ret = iwl_mvm_send_cmd_pdu_status(mvm, BINDING_CONTEXT_CMD,
 503					  size, &binding_cmd, &status);
 
 504	if (ret) {
 505		IWL_ERR(mvm, "Failed to add binding: %d\n", ret);
 506		return ret;
 507	}
 508
 509	if (status) {
 510		IWL_ERR(mvm, "Binding command failed: %u\n", status);
 511		return -EIO;
 512	}
 513
 514	ret = iwl_mvm_sta_send_to_fw(mvm, ap_sta, false, 0);
 515	if (ret)
 516		return ret;
 517	rcu_assign_pointer(mvm->fw_id_to_mac_id[mvmvif->ap_sta_id], ap_sta);
 518
 519	ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
 520	if (ret)
 521		return ret;
 522
 523	/* and some quota */
 524	quota = iwl_mvm_quota_cmd_get_quota(mvm, &quota_cmd, 0);
 525	quota->id_and_color =
 526		cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->phy_ctxt->id,
 527						mvmvif->phy_ctxt->color));
 528	quota->quota = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 529	quota->max_duration = cpu_to_le32(IWL_MVM_MAX_QUOTA);
 530
 531	for (i = 1; i < MAX_BINDINGS; i++) {
 532		quota = iwl_mvm_quota_cmd_get_quota(mvm, &quota_cmd, i);
 533		quota->id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 534	}
 535
 536	ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 537				   iwl_mvm_quota_cmd_size(mvm), &quota_cmd);
 538	if (ret)
 539		IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 540
 541	if (iwl_mvm_is_lar_supported(mvm) && iwl_mvm_init_fw_regd(mvm))
 542		IWL_ERR(mvm, "Failed to initialize D3 LAR information\n");
 543
 544	return 0;
 545}
 546
 547static int iwl_mvm_get_last_nonqos_seq(struct iwl_mvm *mvm,
 548				       struct ieee80211_vif *vif)
 549{
 550	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 551	struct iwl_nonqos_seq_query_cmd query_cmd = {
 552		.get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_GET),
 553		.mac_id_n_color =
 554			cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 555							mvmvif->color)),
 556	};
 557	struct iwl_host_cmd cmd = {
 558		.id = NON_QOS_TX_COUNTER_CMD,
 559		.flags = CMD_WANT_SKB,
 560	};
 561	int err;
 562	u32 size;
 563
 564	cmd.data[0] = &query_cmd;
 565	cmd.len[0] = sizeof(query_cmd);
 566
 567	err = iwl_mvm_send_cmd(mvm, &cmd);
 568	if (err)
 569		return err;
 570
 571	size = iwl_rx_packet_payload_len(cmd.resp_pkt);
 572	if (size < sizeof(__le16)) {
 573		err = -EINVAL;
 574	} else {
 575		err = le16_to_cpup((__le16 *)cmd.resp_pkt->data);
 576		/* firmware returns next, not last-used seqno */
 577		err = (u16) (err - 0x10);
 578	}
 579
 580	iwl_free_resp(&cmd);
 581	return err;
 582}
 583
 584void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
 585{
 586	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 587	struct iwl_nonqos_seq_query_cmd query_cmd = {
 588		.get_set_flag = cpu_to_le32(IWL_NONQOS_SEQ_SET),
 589		.mac_id_n_color =
 590			cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
 591							mvmvif->color)),
 592		.value = cpu_to_le16(mvmvif->seqno),
 593	};
 594
 595	/* return if called during restart, not resume from D3 */
 596	if (!mvmvif->seqno_valid)
 597		return;
 598
 599	mvmvif->seqno_valid = false;
 600
 601	if (iwl_mvm_send_cmd_pdu(mvm, NON_QOS_TX_COUNTER_CMD, 0,
 602				 sizeof(query_cmd), &query_cmd))
 603		IWL_ERR(mvm, "failed to set non-QoS seqno\n");
 604}
 605
 606static int iwl_mvm_switch_to_d3(struct iwl_mvm *mvm)
 607{
 608	iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
 609
 610	iwl_mvm_stop_device(mvm);
 611	/*
 612	 * Set the HW restart bit -- this is mostly true as we're
 613	 * going to load new firmware and reprogram that, though
 614	 * the reprogramming is going to be manual to avoid adding
 615	 * all the MACs that aren't support.
 616	 * We don't have to clear up everything though because the
 617	 * reprogramming is manual. When we resume, we'll actually
 618	 * go through a proper restart sequence again to switch
 619	 * back to the runtime firmware image.
 620	 */
 621	set_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
 622
 623	/* the fw is reset, so all the keys are cleared */
 624	memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
 625
 626	mvm->ptk_ivlen = 0;
 627	mvm->ptk_icvlen = 0;
 628	mvm->ptk_ivlen = 0;
 629	mvm->ptk_icvlen = 0;
 630
 631	return iwl_mvm_load_d3_fw(mvm);
 632}
 633
 634static int
 635iwl_mvm_get_wowlan_config(struct iwl_mvm *mvm,
 636			  struct cfg80211_wowlan *wowlan,
 637			  struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 638			  struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 639			  struct ieee80211_sta *ap_sta)
 640{
 641	int ret;
 642	struct iwl_mvm_sta *mvm_ap_sta = iwl_mvm_sta_from_mac80211(ap_sta);
 643
 644	/* TODO: wowlan_config_cmd->wowlan_ba_teardown_tids */
 645
 646	wowlan_config_cmd->is_11n_connection =
 647					ap_sta->ht_cap.ht_supported;
 648	wowlan_config_cmd->flags = ENABLE_L3_FILTERING |
 649		ENABLE_NBNS_FILTERING | ENABLE_DHCP_FILTERING;
 650
 651	/* Query the last used seqno and set it */
 652	ret = iwl_mvm_get_last_nonqos_seq(mvm, vif);
 653	if (ret < 0)
 654		return ret;
 655
 656	wowlan_config_cmd->non_qos_seq = cpu_to_le16(ret);
 657
 658	iwl_mvm_set_wowlan_qos_seq(mvm_ap_sta, wowlan_config_cmd);
 659
 660	if (wowlan->disconnect)
 661		wowlan_config_cmd->wakeup_filter |=
 662			cpu_to_le32(IWL_WOWLAN_WAKEUP_BEACON_MISS |
 663				    IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 664	if (wowlan->magic_pkt)
 665		wowlan_config_cmd->wakeup_filter |=
 666			cpu_to_le32(IWL_WOWLAN_WAKEUP_MAGIC_PACKET);
 667	if (wowlan->gtk_rekey_failure)
 668		wowlan_config_cmd->wakeup_filter |=
 669			cpu_to_le32(IWL_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 670	if (wowlan->eap_identity_req)
 671		wowlan_config_cmd->wakeup_filter |=
 672			cpu_to_le32(IWL_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 673	if (wowlan->four_way_handshake)
 674		wowlan_config_cmd->wakeup_filter |=
 675			cpu_to_le32(IWL_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 676	if (wowlan->n_patterns)
 677		wowlan_config_cmd->wakeup_filter |=
 678			cpu_to_le32(IWL_WOWLAN_WAKEUP_PATTERN_MATCH);
 679
 680	if (wowlan->rfkill_release)
 681		wowlan_config_cmd->wakeup_filter |=
 682			cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 683
 684	if (wowlan->tcp) {
 685		/*
 686		 * Set the "link change" (really "link lost") flag as well
 687		 * since that implies losing the TCP connection.
 688		 */
 689		wowlan_config_cmd->wakeup_filter |=
 690			cpu_to_le32(IWL_WOWLAN_WAKEUP_REMOTE_LINK_LOSS |
 691				    IWL_WOWLAN_WAKEUP_REMOTE_SIGNATURE_TABLE |
 692				    IWL_WOWLAN_WAKEUP_REMOTE_WAKEUP_PACKET |
 693				    IWL_WOWLAN_WAKEUP_LINK_CHANGE);
 694	}
 695
 696	return 0;
 697}
 698
 699static void
 700iwl_mvm_iter_d0i3_ap_keys(struct iwl_mvm *mvm,
 701			  struct ieee80211_vif *vif,
 702			  void (*iter)(struct ieee80211_hw *hw,
 703				       struct ieee80211_vif *vif,
 704				       struct ieee80211_sta *sta,
 705				       struct ieee80211_key_conf *key,
 706				       void *data),
 707			  void *data)
 708{
 709	struct ieee80211_sta *ap_sta;
 710
 711	rcu_read_lock();
 712
 713	ap_sta = rcu_dereference(mvm->fw_id_to_mac_id[mvm->d0i3_ap_sta_id]);
 714	if (IS_ERR_OR_NULL(ap_sta))
 715		goto out;
 716
 717	ieee80211_iter_keys_rcu(mvm->hw, vif, iter, data);
 718out:
 719	rcu_read_unlock();
 720}
 721
 722int iwl_mvm_wowlan_config_key_params(struct iwl_mvm *mvm,
 723				     struct ieee80211_vif *vif,
 724				     bool d0i3,
 725				     u32 cmd_flags)
 726{
 727	struct iwl_wowlan_kek_kck_material_cmd kek_kck_cmd = {};
 728	struct iwl_wowlan_tkip_params_cmd tkip_cmd = {};
 729	struct wowlan_key_data key_data = {
 730		.configure_keys = !d0i3,
 731		.use_rsc_tsc = false,
 732		.tkip = &tkip_cmd,
 733		.use_tkip = false,
 734	};
 735	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 736	int ret;
 737
 738	key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 739	if (!key_data.rsc_tsc)
 740		return -ENOMEM;
 741
 742	/*
 743	 * if we have to configure keys, call ieee80211_iter_keys(),
 744	 * as we need non-atomic context in order to take the
 745	 * required locks.
 746	 * for the d0i3 we can't use ieee80211_iter_keys(), as
 747	 * taking (almost) any mutex might result in deadlock.
 748	 */
 749	if (!d0i3) {
 750		/*
 751		 * Note that currently we don't propagate cmd_flags
 752		 * to the iterator. In case of key_data.configure_keys,
 753		 * all the configured commands are SYNC, and
 754		 * iwl_mvm_wowlan_program_keys() will take care of
 755		 * locking/unlocking mvm->mutex.
 756		 */
 757		ieee80211_iter_keys(mvm->hw, vif,
 758				    iwl_mvm_wowlan_program_keys,
 759				    &key_data);
 760	} else {
 761		iwl_mvm_iter_d0i3_ap_keys(mvm, vif,
 762					  iwl_mvm_wowlan_program_keys,
 763					  &key_data);
 764	}
 765
 766	if (key_data.error) {
 767		ret = -EIO;
 768		goto out;
 769	}
 770
 771	if (key_data.use_rsc_tsc) {
 772		ret = iwl_mvm_send_cmd_pdu(mvm,
 773					   WOWLAN_TSC_RSC_PARAM, cmd_flags,
 774					   sizeof(*key_data.rsc_tsc),
 775					   key_data.rsc_tsc);
 776		if (ret)
 777			goto out;
 778	}
 779
 780	if (key_data.use_tkip &&
 781	    !fw_has_api(&mvm->fw->ucode_capa,
 782			IWL_UCODE_TLV_API_TKIP_MIC_KEYS)) {
 783		ret = iwl_mvm_send_cmd_pdu(mvm,
 784					   WOWLAN_TKIP_PARAM,
 785					   cmd_flags, sizeof(tkip_cmd),
 786					   &tkip_cmd);
 787		if (ret)
 788			goto out;
 789	}
 790
 791	/* configure rekey data only if offloaded rekey is supported (d3) */
 792	if (mvmvif->rekey_data.valid && !d0i3) {
 793		memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 794		memcpy(kek_kck_cmd.kck, mvmvif->rekey_data.kck,
 795		       NL80211_KCK_LEN);
 796		kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 797		memcpy(kek_kck_cmd.kek, mvmvif->rekey_data.kek,
 798		       NL80211_KEK_LEN);
 799		kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 800		kek_kck_cmd.replay_ctr = mvmvif->rekey_data.replay_ctr;
 801
 802		ret = iwl_mvm_send_cmd_pdu(mvm,
 803					   WOWLAN_KEK_KCK_MATERIAL, cmd_flags,
 804					   sizeof(kek_kck_cmd),
 805					   &kek_kck_cmd);
 806		if (ret)
 807			goto out;
 808	}
 809	ret = 0;
 810out:
 811	kfree(key_data.rsc_tsc);
 812	return ret;
 813}
 814
 815static int
 816iwl_mvm_wowlan_config(struct iwl_mvm *mvm,
 817		      struct cfg80211_wowlan *wowlan,
 818		      struct iwl_wowlan_config_cmd *wowlan_config_cmd,
 819		      struct ieee80211_vif *vif, struct iwl_mvm_vif *mvmvif,
 820		      struct ieee80211_sta *ap_sta)
 821{
 822	int ret;
 823	bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
 824					 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
 825
 826	if (!unified_image) {
 827		ret = iwl_mvm_switch_to_d3(mvm);
 828		if (ret)
 829			return ret;
 830
 831		ret = iwl_mvm_d3_reprogram(mvm, vif, ap_sta);
 832		if (ret)
 833			return ret;
 834	}
 835
 836	if (!iwlwifi_mod_params.swcrypto) {
 837		/*
 838		 * This needs to be unlocked due to lock ordering
 839		 * constraints. Since we're in the suspend path
 840		 * that isn't really a problem though.
 841		 */
 842		mutex_unlock(&mvm->mutex);
 843		ret = iwl_mvm_wowlan_config_key_params(mvm, vif, false,
 844						       CMD_ASYNC);
 845		mutex_lock(&mvm->mutex);
 846		if (ret)
 847			return ret;
 848	}
 849
 850	ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 851				   sizeof(*wowlan_config_cmd),
 852				   wowlan_config_cmd);
 853	if (ret)
 854		return ret;
 855
 856	ret = iwl_mvm_send_patterns(mvm, wowlan);
 857	if (ret)
 858		return ret;
 859
 860	return iwl_mvm_send_proto_offload(mvm, vif, false, true, 0);
 
 
 
 
 
 861}
 862
 863static int
 864iwl_mvm_netdetect_config(struct iwl_mvm *mvm,
 865			 struct cfg80211_wowlan *wowlan,
 866			 struct cfg80211_sched_scan_request *nd_config,
 867			 struct ieee80211_vif *vif)
 868{
 869	struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
 870	int ret;
 871	bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
 872					 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
 873
 874	if (!unified_image) {
 875		ret = iwl_mvm_switch_to_d3(mvm);
 876		if (ret)
 877			return ret;
 878	} else {
 879		/* In theory, we wouldn't have to stop a running sched
 880		 * scan in order to start another one (for
 881		 * net-detect).  But in practice this doesn't seem to
 882		 * work properly, so stop any running sched_scan now.
 883		 */
 884		ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
 885		if (ret)
 886			return ret;
 887	}
 888
 889	/* rfkill release can be either for wowlan or netdetect */
 890	if (wowlan->rfkill_release)
 891		wowlan_config_cmd.wakeup_filter |=
 892			cpu_to_le32(IWL_WOWLAN_WAKEUP_RF_KILL_DEASSERT);
 893
 894	ret = iwl_mvm_send_cmd_pdu(mvm, WOWLAN_CONFIGURATION, 0,
 895				   sizeof(wowlan_config_cmd),
 896				   &wowlan_config_cmd);
 897	if (ret)
 898		return ret;
 899
 900	ret = iwl_mvm_sched_scan_start(mvm, vif, nd_config, &mvm->nd_ies,
 901				       IWL_MVM_SCAN_NETDETECT);
 902	if (ret)
 903		return ret;
 904
 905	if (WARN_ON(mvm->nd_match_sets || mvm->nd_channels))
 906		return -EBUSY;
 907
 908	/* save the sched scan matchsets... */
 909	if (nd_config->n_match_sets) {
 910		mvm->nd_match_sets = kmemdup(nd_config->match_sets,
 911					     sizeof(*nd_config->match_sets) *
 912					     nd_config->n_match_sets,
 913					     GFP_KERNEL);
 914		if (mvm->nd_match_sets)
 915			mvm->n_nd_match_sets = nd_config->n_match_sets;
 916	}
 917
 918	/* ...and the sched scan channels for later reporting */
 919	mvm->nd_channels = kmemdup(nd_config->channels,
 920				   sizeof(*nd_config->channels) *
 921				   nd_config->n_channels,
 922				   GFP_KERNEL);
 923	if (mvm->nd_channels)
 924		mvm->n_nd_channels = nd_config->n_channels;
 925
 926	return 0;
 927}
 928
 929static void iwl_mvm_free_nd(struct iwl_mvm *mvm)
 930{
 931	kfree(mvm->nd_match_sets);
 932	mvm->nd_match_sets = NULL;
 933	mvm->n_nd_match_sets = 0;
 934	kfree(mvm->nd_channels);
 935	mvm->nd_channels = NULL;
 936	mvm->n_nd_channels = 0;
 937}
 938
 939static int __iwl_mvm_suspend(struct ieee80211_hw *hw,
 940			     struct cfg80211_wowlan *wowlan,
 941			     bool test)
 942{
 943	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
 944	struct ieee80211_vif *vif = NULL;
 945	struct iwl_mvm_vif *mvmvif = NULL;
 946	struct ieee80211_sta *ap_sta = NULL;
 947	struct iwl_d3_manager_config d3_cfg_cmd_data = {
 948		/*
 949		 * Program the minimum sleep time to 10 seconds, as many
 950		 * platforms have issues processing a wakeup signal while
 951		 * still being in the process of suspending.
 952		 */
 953		.min_sleep_time = cpu_to_le32(10 * 1000 * 1000),
 954	};
 955	struct iwl_host_cmd d3_cfg_cmd = {
 956		.id = D3_CONFIG_CMD,
 957		.flags = CMD_WANT_SKB,
 958		.data[0] = &d3_cfg_cmd_data,
 959		.len[0] = sizeof(d3_cfg_cmd_data),
 960	};
 961	int ret;
 962	int len __maybe_unused;
 963	bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
 964					 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
 965
 966	if (!wowlan) {
 967		/*
 968		 * mac80211 shouldn't get here, but for D3 test
 969		 * it doesn't warrant a warning
 970		 */
 971		WARN_ON(!test);
 972		return -EINVAL;
 973	}
 974
 975	mutex_lock(&mvm->mutex);
 976
 977	vif = iwl_mvm_get_bss_vif(mvm);
 978	if (IS_ERR_OR_NULL(vif)) {
 979		ret = 1;
 980		goto out_noreset;
 981	}
 982
 983	mvmvif = iwl_mvm_vif_from_mac80211(vif);
 984
 985	if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA) {
 986		/* if we're not associated, this must be netdetect */
 987		if (!wowlan->nd_config) {
 988			ret = 1;
 989			goto out_noreset;
 990		}
 991
 992		ret = iwl_mvm_netdetect_config(
 993			mvm, wowlan, wowlan->nd_config, vif);
 994		if (ret)
 995			goto out;
 996
 997		mvm->net_detect = true;
 998	} else {
 999		struct iwl_wowlan_config_cmd wowlan_config_cmd = {};
1000
1001		ap_sta = rcu_dereference_protected(
1002			mvm->fw_id_to_mac_id[mvmvif->ap_sta_id],
1003			lockdep_is_held(&mvm->mutex));
1004		if (IS_ERR_OR_NULL(ap_sta)) {
1005			ret = -EINVAL;
1006			goto out_noreset;
1007		}
1008
1009		ret = iwl_mvm_get_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1010						vif, mvmvif, ap_sta);
1011		if (ret)
1012			goto out_noreset;
1013		ret = iwl_mvm_wowlan_config(mvm, wowlan, &wowlan_config_cmd,
1014					    vif, mvmvif, ap_sta);
1015		if (ret)
1016			goto out;
1017
1018		mvm->net_detect = false;
1019	}
1020
1021	ret = iwl_mvm_power_update_device(mvm);
1022	if (ret)
1023		goto out;
1024
1025	ret = iwl_mvm_power_update_mac(mvm);
1026	if (ret)
1027		goto out;
1028
1029#ifdef CONFIG_IWLWIFI_DEBUGFS
1030	if (mvm->d3_wake_sysassert)
1031		d3_cfg_cmd_data.wakeup_flags |=
1032			cpu_to_le32(IWL_WAKEUP_D3_CONFIG_FW_ERROR);
1033#endif
1034
1035	/* must be last -- this switches firmware state */
1036	ret = iwl_mvm_send_cmd(mvm, &d3_cfg_cmd);
1037	if (ret)
1038		goto out;
1039#ifdef CONFIG_IWLWIFI_DEBUGFS
1040	len = iwl_rx_packet_payload_len(d3_cfg_cmd.resp_pkt);
1041	if (len >= sizeof(u32)) {
1042		mvm->d3_test_pme_ptr =
1043			le32_to_cpup((__le32 *)d3_cfg_cmd.resp_pkt->data);
1044	}
1045#endif
1046	iwl_free_resp(&d3_cfg_cmd);
1047
1048	clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1049
1050	iwl_trans_d3_suspend(mvm->trans, test, !unified_image);
1051 out:
1052	if (ret < 0) {
1053		iwl_mvm_free_nd(mvm);
1054
1055		if (!unified_image) {
1056			iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1057			if (mvm->fw_restart > 0) {
1058				mvm->fw_restart--;
1059				ieee80211_restart_hw(mvm->hw);
1060			}
1061		}
 
1062	}
1063 out_noreset:
1064	mutex_unlock(&mvm->mutex);
1065
1066	return ret;
1067}
1068
1069static int iwl_mvm_enter_d0i3_sync(struct iwl_mvm *mvm)
1070{
1071	struct iwl_notification_wait wait_d3;
1072	static const u16 d3_notif[] = { D3_CONFIG_CMD };
1073	int ret;
1074
1075	iwl_init_notification_wait(&mvm->notif_wait, &wait_d3,
1076				   d3_notif, ARRAY_SIZE(d3_notif),
1077				   NULL, NULL);
1078
1079	ret = iwl_mvm_enter_d0i3(mvm->hw->priv);
1080	if (ret)
1081		goto remove_notif;
1082
1083	ret = iwl_wait_notification(&mvm->notif_wait, &wait_d3, HZ);
1084	WARN_ON_ONCE(ret);
1085	return ret;
1086
1087remove_notif:
1088	iwl_remove_notification(&mvm->notif_wait, &wait_d3);
1089	return ret;
1090}
1091
1092int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
1093{
1094	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1095	struct iwl_trans *trans = mvm->trans;
1096	int ret;
1097
1098	/* make sure the d0i3 exit work is not pending */
1099	flush_work(&mvm->d0i3_exit_work);
1100
1101	iwl_fw_runtime_suspend(&mvm->fwrt);
1102
1103	ret = iwl_trans_suspend(trans);
1104	if (ret)
1105		return ret;
1106
1107	if (wowlan->any) {
1108		trans->system_pm_mode = IWL_PLAT_PM_MODE_D0I3;
1109
1110		if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
1111			ret = iwl_mvm_enter_d0i3_sync(mvm);
1112
1113			if (ret)
1114				return ret;
1115		}
1116
1117		mutex_lock(&mvm->d0i3_suspend_mutex);
1118		__set_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1119		mutex_unlock(&mvm->d0i3_suspend_mutex);
1120
1121		iwl_trans_d3_suspend(trans, false, false);
1122
1123		return 0;
1124	}
1125
1126	trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
1127
1128	return __iwl_mvm_suspend(hw, wowlan, false);
1129}
1130
1131/* converted data from the different status responses */
1132struct iwl_wowlan_status_data {
1133	u16 pattern_number;
1134	u16 qos_seq_ctr[8];
1135	u32 wakeup_reasons;
1136	u32 wake_packet_length;
1137	u32 wake_packet_bufsize;
1138	const u8 *wake_packet;
1139};
1140
1141static void iwl_mvm_report_wakeup_reasons(struct iwl_mvm *mvm,
1142					  struct ieee80211_vif *vif,
1143					  struct iwl_wowlan_status_data *status)
1144{
1145	struct sk_buff *pkt = NULL;
1146	struct cfg80211_wowlan_wakeup wakeup = {
1147		.pattern_idx = -1,
1148	};
1149	struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1150	u32 reasons = status->wakeup_reasons;
1151
1152	if (reasons == IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS) {
1153		wakeup_report = NULL;
1154		goto report;
1155	}
1156
1157	pm_wakeup_event(mvm->dev, 0);
1158
1159	if (reasons & IWL_WOWLAN_WAKEUP_BY_MAGIC_PACKET)
1160		wakeup.magic_pkt = true;
1161
1162	if (reasons & IWL_WOWLAN_WAKEUP_BY_PATTERN)
1163		wakeup.pattern_idx =
1164			status->pattern_number;
1165
1166	if (reasons & (IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1167		       IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH))
1168		wakeup.disconnect = true;
1169
1170	if (reasons & IWL_WOWLAN_WAKEUP_BY_GTK_REKEY_FAILURE)
1171		wakeup.gtk_rekey_failure = true;
1172
1173	if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1174		wakeup.rfkill_release = true;
1175
1176	if (reasons & IWL_WOWLAN_WAKEUP_BY_EAPOL_REQUEST)
1177		wakeup.eap_identity_req = true;
1178
1179	if (reasons & IWL_WOWLAN_WAKEUP_BY_FOUR_WAY_HANDSHAKE)
1180		wakeup.four_way_handshake = true;
1181
1182	if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_LINK_LOSS)
1183		wakeup.tcp_connlost = true;
1184
1185	if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_SIGNATURE_TABLE)
1186		wakeup.tcp_nomoretokens = true;
1187
1188	if (reasons & IWL_WOWLAN_WAKEUP_BY_REM_WAKE_WAKEUP_PACKET)
1189		wakeup.tcp_match = true;
1190
1191	if (status->wake_packet_bufsize) {
1192		int pktsize = status->wake_packet_bufsize;
1193		int pktlen = status->wake_packet_length;
1194		const u8 *pktdata = status->wake_packet;
1195		struct ieee80211_hdr *hdr = (void *)pktdata;
1196		int truncated = pktlen - pktsize;
1197
1198		/* this would be a firmware bug */
1199		if (WARN_ON_ONCE(truncated < 0))
1200			truncated = 0;
1201
1202		if (ieee80211_is_data(hdr->frame_control)) {
1203			int hdrlen = ieee80211_hdrlen(hdr->frame_control);
1204			int ivlen = 0, icvlen = 4; /* also FCS */
1205
1206			pkt = alloc_skb(pktsize, GFP_KERNEL);
1207			if (!pkt)
1208				goto report;
1209
1210			skb_put_data(pkt, pktdata, hdrlen);
1211			pktdata += hdrlen;
1212			pktsize -= hdrlen;
1213
1214			if (ieee80211_has_protected(hdr->frame_control)) {
1215				/*
1216				 * This is unlocked and using gtk_i(c)vlen,
1217				 * but since everything is under RTNL still
1218				 * that's not really a problem - changing
1219				 * it would be difficult.
1220				 */
1221				if (is_multicast_ether_addr(hdr->addr1)) {
1222					ivlen = mvm->gtk_ivlen;
1223					icvlen += mvm->gtk_icvlen;
1224				} else {
1225					ivlen = mvm->ptk_ivlen;
1226					icvlen += mvm->ptk_icvlen;
1227				}
1228			}
1229
1230			/* if truncated, FCS/ICV is (partially) gone */
1231			if (truncated >= icvlen) {
1232				icvlen = 0;
1233				truncated -= icvlen;
1234			} else {
1235				icvlen -= truncated;
1236				truncated = 0;
1237			}
1238
1239			pktsize -= ivlen + icvlen;
1240			pktdata += ivlen;
1241
1242			skb_put_data(pkt, pktdata, pktsize);
1243
1244			if (ieee80211_data_to_8023(pkt, vif->addr, vif->type))
1245				goto report;
1246			wakeup.packet = pkt->data;
1247			wakeup.packet_present_len = pkt->len;
1248			wakeup.packet_len = pkt->len - truncated;
1249			wakeup.packet_80211 = false;
1250		} else {
1251			int fcslen = 4;
1252
1253			if (truncated >= 4) {
1254				truncated -= 4;
1255				fcslen = 0;
1256			} else {
1257				fcslen -= truncated;
1258				truncated = 0;
1259			}
1260			pktsize -= fcslen;
1261			wakeup.packet = status->wake_packet;
1262			wakeup.packet_present_len = pktsize;
1263			wakeup.packet_len = pktlen - truncated;
1264			wakeup.packet_80211 = true;
1265		}
1266	}
1267
1268 report:
1269	ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1270	kfree_skb(pkt);
1271}
1272
1273static void iwl_mvm_aes_sc_to_seq(struct aes_sc *sc,
1274				  struct ieee80211_key_seq *seq)
1275{
1276	u64 pn;
1277
1278	pn = le64_to_cpu(sc->pn);
1279	seq->ccmp.pn[0] = pn >> 40;
1280	seq->ccmp.pn[1] = pn >> 32;
1281	seq->ccmp.pn[2] = pn >> 24;
1282	seq->ccmp.pn[3] = pn >> 16;
1283	seq->ccmp.pn[4] = pn >> 8;
1284	seq->ccmp.pn[5] = pn;
1285}
1286
1287static void iwl_mvm_tkip_sc_to_seq(struct tkip_sc *sc,
1288				   struct ieee80211_key_seq *seq)
1289{
1290	seq->tkip.iv32 = le32_to_cpu(sc->iv32);
1291	seq->tkip.iv16 = le16_to_cpu(sc->iv16);
1292}
1293
1294static void iwl_mvm_set_aes_rx_seq(struct iwl_mvm *mvm, struct aes_sc *scs,
1295				   struct ieee80211_sta *sta,
1296				   struct ieee80211_key_conf *key)
1297{
1298	int tid;
1299
1300	BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1301
1302	if (sta && iwl_mvm_has_new_rx_api(mvm)) {
1303		struct iwl_mvm_sta *mvmsta;
1304		struct iwl_mvm_key_pn *ptk_pn;
1305
1306		mvmsta = iwl_mvm_sta_from_mac80211(sta);
1307
1308		ptk_pn = rcu_dereference_protected(mvmsta->ptk_pn[key->keyidx],
1309						   lockdep_is_held(&mvm->mutex));
1310		if (WARN_ON(!ptk_pn))
1311			return;
1312
1313		for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1314			struct ieee80211_key_seq seq = {};
1315			int i;
1316
1317			iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1318			ieee80211_set_key_rx_seq(key, tid, &seq);
1319			for (i = 1; i < mvm->trans->num_rx_queues; i++)
1320				memcpy(ptk_pn->q[i].pn[tid],
1321				       seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
1322		}
1323	} else {
1324		for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1325			struct ieee80211_key_seq seq = {};
1326
1327			iwl_mvm_aes_sc_to_seq(&scs[tid], &seq);
1328			ieee80211_set_key_rx_seq(key, tid, &seq);
1329		}
1330	}
1331}
1332
1333static void iwl_mvm_set_tkip_rx_seq(struct tkip_sc *scs,
1334				    struct ieee80211_key_conf *key)
1335{
1336	int tid;
1337
1338	BUILD_BUG_ON(IWL_NUM_RSC != IEEE80211_NUM_TIDS);
1339
1340	for (tid = 0; tid < IWL_NUM_RSC; tid++) {
1341		struct ieee80211_key_seq seq = {};
1342
1343		iwl_mvm_tkip_sc_to_seq(&scs[tid], &seq);
1344		ieee80211_set_key_rx_seq(key, tid, &seq);
1345	}
1346}
1347
1348static void iwl_mvm_set_key_rx_seq(struct iwl_mvm *mvm,
1349				   struct ieee80211_key_conf *key,
1350				   struct iwl_wowlan_status *status)
1351{
1352	union iwl_all_tsc_rsc *rsc = &status->gtk.rsc.all_tsc_rsc;
1353
1354	switch (key->cipher) {
1355	case WLAN_CIPHER_SUITE_CCMP:
1356		iwl_mvm_set_aes_rx_seq(mvm, rsc->aes.multicast_rsc, NULL, key);
1357		break;
1358	case WLAN_CIPHER_SUITE_TKIP:
1359		iwl_mvm_set_tkip_rx_seq(rsc->tkip.multicast_rsc, key);
1360		break;
1361	default:
1362		WARN_ON(1);
1363	}
1364}
1365
1366struct iwl_mvm_d3_gtk_iter_data {
1367	struct iwl_mvm *mvm;
1368	struct iwl_wowlan_status *status;
1369	void *last_gtk;
1370	u32 cipher;
1371	bool find_phase, unhandled_cipher;
1372	int num_keys;
1373};
1374
1375static void iwl_mvm_d3_update_keys(struct ieee80211_hw *hw,
1376				   struct ieee80211_vif *vif,
1377				   struct ieee80211_sta *sta,
1378				   struct ieee80211_key_conf *key,
1379				   void *_data)
1380{
1381	struct iwl_mvm_d3_gtk_iter_data *data = _data;
1382
1383	if (data->unhandled_cipher)
1384		return;
1385
1386	switch (key->cipher) {
1387	case WLAN_CIPHER_SUITE_WEP40:
1388	case WLAN_CIPHER_SUITE_WEP104:
1389		/* ignore WEP completely, nothing to do */
1390		return;
1391	case WLAN_CIPHER_SUITE_CCMP:
1392	case WLAN_CIPHER_SUITE_TKIP:
1393		/* we support these */
1394		break;
1395	default:
1396		/* everything else (even CMAC for MFP) - disconnect from AP */
1397		data->unhandled_cipher = true;
1398		return;
1399	}
1400
1401	data->num_keys++;
1402
1403	/*
1404	 * pairwise key - update sequence counters only;
1405	 * note that this assumes no TDLS sessions are active
1406	 */
1407	if (sta) {
1408		struct ieee80211_key_seq seq = {};
1409		union iwl_all_tsc_rsc *sc = &data->status->gtk.rsc.all_tsc_rsc;
1410
1411		if (data->find_phase)
1412			return;
1413
1414		switch (key->cipher) {
1415		case WLAN_CIPHER_SUITE_CCMP:
1416			iwl_mvm_set_aes_rx_seq(data->mvm, sc->aes.unicast_rsc,
1417					       sta, key);
1418			atomic64_set(&key->tx_pn, le64_to_cpu(sc->aes.tsc.pn));
1419			break;
1420		case WLAN_CIPHER_SUITE_TKIP:
1421			iwl_mvm_tkip_sc_to_seq(&sc->tkip.tsc, &seq);
1422			iwl_mvm_set_tkip_rx_seq(sc->tkip.unicast_rsc, key);
1423			atomic64_set(&key->tx_pn,
1424				     (u64)seq.tkip.iv16 |
1425				     ((u64)seq.tkip.iv32 << 16));
1426			break;
1427		}
1428
1429		/* that's it for this key */
1430		return;
1431	}
1432
1433	if (data->find_phase) {
1434		data->last_gtk = key;
1435		data->cipher = key->cipher;
1436		return;
1437	}
1438
1439	if (data->status->num_of_gtk_rekeys)
1440		ieee80211_remove_key(key);
1441	else if (data->last_gtk == key)
1442		iwl_mvm_set_key_rx_seq(data->mvm, key, data->status);
1443}
1444
1445static bool iwl_mvm_setup_connection_keep(struct iwl_mvm *mvm,
1446					  struct ieee80211_vif *vif,
1447					  struct iwl_wowlan_status *status)
1448{
1449	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1450	struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1451		.mvm = mvm,
1452		.status = status,
1453	};
1454	u32 disconnection_reasons =
1455		IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_MISSED_BEACON |
1456		IWL_WOWLAN_WAKEUP_BY_DISCONNECTION_ON_DEAUTH;
1457
1458	if (!status || !vif->bss_conf.bssid)
1459		return false;
1460
1461	if (le32_to_cpu(status->wakeup_reasons) & disconnection_reasons)
1462		return false;
1463
1464	/* find last GTK that we used initially, if any */
1465	gtkdata.find_phase = true;
1466	ieee80211_iter_keys(mvm->hw, vif,
1467			    iwl_mvm_d3_update_keys, &gtkdata);
1468	/* not trying to keep connections with MFP/unhandled ciphers */
1469	if (gtkdata.unhandled_cipher)
1470		return false;
1471	if (!gtkdata.num_keys)
1472		goto out;
1473	if (!gtkdata.last_gtk)
1474		return false;
1475
1476	/*
1477	 * invalidate all other GTKs that might still exist and update
1478	 * the one that we used
1479	 */
1480	gtkdata.find_phase = false;
1481	ieee80211_iter_keys(mvm->hw, vif,
1482			    iwl_mvm_d3_update_keys, &gtkdata);
1483
1484	if (status->num_of_gtk_rekeys) {
1485		struct ieee80211_key_conf *key;
1486		struct {
1487			struct ieee80211_key_conf conf;
1488			u8 key[32];
1489		} conf = {
1490			.conf.cipher = gtkdata.cipher,
1491			.conf.keyidx = status->gtk.key_index,
1492		};
1493
1494		switch (gtkdata.cipher) {
1495		case WLAN_CIPHER_SUITE_CCMP:
1496			conf.conf.keylen = WLAN_KEY_LEN_CCMP;
1497			memcpy(conf.conf.key, status->gtk.decrypt_key,
1498			       WLAN_KEY_LEN_CCMP);
1499			break;
1500		case WLAN_CIPHER_SUITE_TKIP:
1501			conf.conf.keylen = WLAN_KEY_LEN_TKIP;
1502			memcpy(conf.conf.key, status->gtk.decrypt_key, 16);
1503			/* leave TX MIC key zeroed, we don't use it anyway */
1504			memcpy(conf.conf.key +
1505			       NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY,
1506			       status->gtk.tkip_mic_key, 8);
1507			break;
1508		}
1509
1510		key = ieee80211_gtk_rekey_add(vif, &conf.conf);
1511		if (IS_ERR(key))
1512			return false;
1513		iwl_mvm_set_key_rx_seq(mvm, key, status);
1514	}
1515
1516	if (status->num_of_gtk_rekeys) {
1517		__be64 replay_ctr =
1518			cpu_to_be64(le64_to_cpu(status->replay_ctr));
1519		ieee80211_gtk_rekey_notify(vif, vif->bss_conf.bssid,
1520					   (void *)&replay_ctr, GFP_KERNEL);
1521	}
1522
1523out:
1524	mvmvif->seqno_valid = true;
1525	/* +0x10 because the set API expects next-to-use, not last-used */
1526	mvmvif->seqno = le16_to_cpu(status->non_qos_seq_ctr) + 0x10;
1527
1528	return true;
1529}
1530
1531static struct iwl_wowlan_status *
1532iwl_mvm_get_wakeup_status(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1533{
1534	u32 base = mvm->error_event_table[0];
1535	struct error_table_start {
1536		/* cf. struct iwl_error_event_table */
1537		u32 valid;
1538		u32 error_id;
1539	} err_info;
1540	struct iwl_host_cmd cmd = {
1541		.id = WOWLAN_GET_STATUSES,
1542		.flags = CMD_WANT_SKB,
1543	};
1544	struct iwl_wowlan_status *status, *fw_status;
1545	int ret, len, status_size;
1546
1547	iwl_trans_read_mem_bytes(mvm->trans, base,
1548				 &err_info, sizeof(err_info));
1549
1550	if (err_info.valid) {
1551		IWL_INFO(mvm, "error table is valid (%d) with error (%d)\n",
1552			 err_info.valid, err_info.error_id);
1553		if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
1554			struct cfg80211_wowlan_wakeup wakeup = {
1555				.rfkill_release = true,
1556			};
1557			ieee80211_report_wowlan_wakeup(vif, &wakeup,
1558						       GFP_KERNEL);
1559		}
1560		return ERR_PTR(-EIO);
1561	}
1562
1563	/* only for tracing for now */
1564	ret = iwl_mvm_send_cmd_pdu(mvm, OFFLOADS_QUERY_CMD, 0, 0, NULL);
1565	if (ret)
1566		IWL_ERR(mvm, "failed to query offload statistics (%d)\n", ret);
1567
1568	ret = iwl_mvm_send_cmd(mvm, &cmd);
1569	if (ret) {
1570		IWL_ERR(mvm, "failed to query status (%d)\n", ret);
1571		return ERR_PTR(ret);
1572	}
1573
 
 
 
 
 
 
1574	status_size = sizeof(*fw_status);
1575
1576	len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1577	if (len < status_size) {
1578		IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1579		fw_status = ERR_PTR(-EIO);
1580		goto out_free_resp;
1581	}
1582
1583	status = (void *)cmd.resp_pkt->data;
1584	if (len != (status_size +
1585		    ALIGN(le32_to_cpu(status->wake_packet_bufsize), 4))) {
1586		IWL_ERR(mvm, "Invalid WoWLAN status response!\n");
1587		fw_status = ERR_PTR(-EIO);
1588		goto out_free_resp;
1589	}
1590
1591	fw_status = kmemdup(status, len, GFP_KERNEL);
1592
1593out_free_resp:
1594	iwl_free_resp(&cmd);
1595	return fw_status;
1596}
1597
1598/* releases the MVM mutex */
1599static bool iwl_mvm_query_wakeup_reasons(struct iwl_mvm *mvm,
1600					 struct ieee80211_vif *vif)
1601{
1602	struct iwl_wowlan_status_data status;
1603	struct iwl_wowlan_status *fw_status;
1604	int i;
1605	bool keep;
1606	struct iwl_mvm_sta *mvm_ap_sta;
1607
1608	fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1609	if (IS_ERR_OR_NULL(fw_status))
1610		goto out_unlock;
1611
1612	status.pattern_number = le16_to_cpu(fw_status->pattern_number);
1613	for (i = 0; i < 8; i++)
1614		status.qos_seq_ctr[i] =
1615			le16_to_cpu(fw_status->qos_seq_ctr[i]);
1616	status.wakeup_reasons = le32_to_cpu(fw_status->wakeup_reasons);
1617	status.wake_packet_length =
1618		le32_to_cpu(fw_status->wake_packet_length);
1619	status.wake_packet_bufsize =
1620		le32_to_cpu(fw_status->wake_packet_bufsize);
1621	status.wake_packet = fw_status->wake_packet;
1622
1623	/* still at hard-coded place 0 for D3 image */
1624	mvm_ap_sta = iwl_mvm_sta_from_staid_protected(mvm, 0);
1625	if (!mvm_ap_sta)
1626		goto out_free;
1627
1628	for (i = 0; i < IWL_MAX_TID_COUNT; i++) {
1629		u16 seq = status.qos_seq_ctr[i];
1630		/* firmware stores last-used value, we store next value */
1631		seq += 0x10;
1632		mvm_ap_sta->tid_data[i].seq_number = seq;
1633	}
1634
1635	/* now we have all the data we need, unlock to avoid mac80211 issues */
1636	mutex_unlock(&mvm->mutex);
1637
1638	iwl_mvm_report_wakeup_reasons(mvm, vif, &status);
1639
1640	keep = iwl_mvm_setup_connection_keep(mvm, vif, fw_status);
1641
1642	kfree(fw_status);
1643	return keep;
1644
1645out_free:
1646	kfree(fw_status);
1647out_unlock:
1648	mutex_unlock(&mvm->mutex);
1649	return false;
1650}
1651
1652void iwl_mvm_d0i3_update_keys(struct iwl_mvm *mvm,
1653			      struct ieee80211_vif *vif,
1654			      struct iwl_wowlan_status *status)
1655{
1656	struct iwl_mvm_d3_gtk_iter_data gtkdata = {
1657		.mvm = mvm,
1658		.status = status,
1659	};
1660
1661	/*
1662	 * rekey handling requires taking locks that can't be taken now.
1663	 * however, d0i3 doesn't offload rekey, so we're fine.
1664	 */
1665	if (WARN_ON_ONCE(status->num_of_gtk_rekeys))
1666		return;
1667
1668	/* find last GTK that we used initially, if any */
1669	gtkdata.find_phase = true;
1670	iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1671
1672	gtkdata.find_phase = false;
1673	iwl_mvm_iter_d0i3_ap_keys(mvm, vif, iwl_mvm_d3_update_keys, &gtkdata);
1674}
1675
1676struct iwl_mvm_nd_query_results {
1677	u32 matched_profiles;
1678	struct iwl_scan_offload_profile_match matches[IWL_SCAN_MAX_PROFILES];
1679};
1680
1681static int
1682iwl_mvm_netdetect_query_results(struct iwl_mvm *mvm,
1683				struct iwl_mvm_nd_query_results *results)
1684{
1685	struct iwl_scan_offload_profiles_query *query;
1686	struct iwl_host_cmd cmd = {
1687		.id = SCAN_OFFLOAD_PROFILES_QUERY_CMD,
1688		.flags = CMD_WANT_SKB,
1689	};
1690	int ret, len;
1691
1692	ret = iwl_mvm_send_cmd(mvm, &cmd);
1693	if (ret) {
1694		IWL_ERR(mvm, "failed to query matched profiles (%d)\n", ret);
1695		return ret;
1696	}
1697
 
 
 
 
 
 
1698	len = iwl_rx_packet_payload_len(cmd.resp_pkt);
1699	if (len < sizeof(*query)) {
1700		IWL_ERR(mvm, "Invalid scan offload profiles query response!\n");
1701		ret = -EIO;
1702		goto out_free_resp;
1703	}
1704
1705	query = (void *)cmd.resp_pkt->data;
1706
1707	results->matched_profiles = le32_to_cpu(query->matched_profiles);
1708	memcpy(results->matches, query->matches, sizeof(results->matches));
1709
1710#ifdef CONFIG_IWLWIFI_DEBUGFS
1711	mvm->last_netdetect_scans = le32_to_cpu(query->n_scans_done);
1712#endif
1713
1714out_free_resp:
1715	iwl_free_resp(&cmd);
1716	return ret;
1717}
1718
1719static void iwl_mvm_query_netdetect_reasons(struct iwl_mvm *mvm,
1720					    struct ieee80211_vif *vif)
1721{
1722	struct cfg80211_wowlan_nd_info *net_detect = NULL;
1723	struct cfg80211_wowlan_wakeup wakeup = {
1724		.pattern_idx = -1,
1725	};
1726	struct cfg80211_wowlan_wakeup *wakeup_report = &wakeup;
1727	struct iwl_mvm_nd_query_results query;
1728	struct iwl_wowlan_status *fw_status;
1729	unsigned long matched_profiles;
1730	u32 reasons = 0;
1731	int i, j, n_matches, ret;
1732
1733	fw_status = iwl_mvm_get_wakeup_status(mvm, vif);
1734	if (!IS_ERR_OR_NULL(fw_status)) {
1735		reasons = le32_to_cpu(fw_status->wakeup_reasons);
1736		kfree(fw_status);
1737	}
1738
1739	if (reasons & IWL_WOWLAN_WAKEUP_BY_RFKILL_DEASSERTED)
1740		wakeup.rfkill_release = true;
1741
1742	if (reasons != IWL_WOWLAN_WAKEUP_BY_NON_WIRELESS)
1743		goto out;
1744
1745	ret = iwl_mvm_netdetect_query_results(mvm, &query);
1746	if (ret || !query.matched_profiles) {
1747		wakeup_report = NULL;
1748		goto out;
1749	}
1750
1751	matched_profiles = query.matched_profiles;
1752	if (mvm->n_nd_match_sets) {
1753		n_matches = hweight_long(matched_profiles);
1754	} else {
1755		IWL_ERR(mvm, "no net detect match information available\n");
1756		n_matches = 0;
1757	}
1758
1759	net_detect = kzalloc(sizeof(*net_detect) +
1760			     (n_matches * sizeof(net_detect->matches[0])),
1761			     GFP_KERNEL);
1762	if (!net_detect || !n_matches)
1763		goto out_report_nd;
1764
1765	for_each_set_bit(i, &matched_profiles, mvm->n_nd_match_sets) {
1766		struct iwl_scan_offload_profile_match *fw_match;
1767		struct cfg80211_wowlan_nd_match *match;
1768		int idx, n_channels = 0;
1769
1770		fw_match = &query.matches[i];
1771
1772		for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN; j++)
1773			n_channels += hweight8(fw_match->matching_channels[j]);
1774
1775		match = kzalloc(sizeof(*match) +
1776				(n_channels * sizeof(*match->channels)),
1777				GFP_KERNEL);
1778		if (!match)
1779			goto out_report_nd;
1780
1781		net_detect->matches[net_detect->n_matches++] = match;
1782
1783		/* We inverted the order of the SSIDs in the scan
1784		 * request, so invert the index here.
1785		 */
1786		idx = mvm->n_nd_match_sets - i - 1;
1787		match->ssid.ssid_len = mvm->nd_match_sets[idx].ssid.ssid_len;
1788		memcpy(match->ssid.ssid, mvm->nd_match_sets[idx].ssid.ssid,
1789		       match->ssid.ssid_len);
1790
1791		if (mvm->n_nd_channels < n_channels)
1792			continue;
1793
1794		for (j = 0; j < SCAN_OFFLOAD_MATCHING_CHANNELS_LEN * 8; j++)
1795			if (fw_match->matching_channels[j / 8] & (BIT(j % 8)))
1796				match->channels[match->n_channels++] =
1797					mvm->nd_channels[j]->center_freq;
1798	}
1799
1800out_report_nd:
1801	wakeup.net_detect = net_detect;
1802out:
1803	iwl_mvm_free_nd(mvm);
1804
1805	mutex_unlock(&mvm->mutex);
1806	ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
1807
1808	if (net_detect) {
1809		for (i = 0; i < net_detect->n_matches; i++)
1810			kfree(net_detect->matches[i]);
1811		kfree(net_detect);
1812	}
1813}
1814
1815static void iwl_mvm_read_d3_sram(struct iwl_mvm *mvm)
1816{
1817#ifdef CONFIG_IWLWIFI_DEBUGFS
1818	const struct fw_img *img = &mvm->fw->img[IWL_UCODE_WOWLAN];
1819	u32 len = img->sec[IWL_UCODE_SECTION_DATA].len;
1820	u32 offs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1821
1822	if (!mvm->store_d3_resume_sram)
1823		return;
1824
1825	if (!mvm->d3_resume_sram) {
1826		mvm->d3_resume_sram = kzalloc(len, GFP_KERNEL);
1827		if (!mvm->d3_resume_sram)
1828			return;
1829	}
1830
1831	iwl_trans_read_mem_bytes(mvm->trans, offs, mvm->d3_resume_sram, len);
1832#endif
1833}
1834
1835static void iwl_mvm_d3_disconnect_iter(void *data, u8 *mac,
1836				       struct ieee80211_vif *vif)
1837{
1838	/* skip the one we keep connection on */
1839	if (data == vif)
1840		return;
1841
1842	if (vif->type == NL80211_IFTYPE_STATION)
1843		ieee80211_resume_disconnect(vif);
1844}
1845
1846static int __iwl_mvm_resume(struct iwl_mvm *mvm, bool test)
1847{
1848	struct ieee80211_vif *vif = NULL;
1849	int ret = 1;
1850	enum iwl_d3_status d3_status;
1851	bool keep = false;
1852	bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1853					 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1854	bool d0i3_first = fw_has_capa(&mvm->fw->ucode_capa,
1855				      IWL_UCODE_TLV_CAPA_D0I3_END_FIRST);
 
1856
1857	mutex_lock(&mvm->mutex);
1858
1859	/* get the BSS vif pointer again */
1860	vif = iwl_mvm_get_bss_vif(mvm);
1861	if (IS_ERR_OR_NULL(vif))
1862		goto err;
1863
1864	ret = iwl_trans_d3_resume(mvm->trans, &d3_status, test, !unified_image);
1865	if (ret)
1866		goto err;
1867
1868	if (d3_status != IWL_D3_STATUS_ALIVE) {
1869		IWL_INFO(mvm, "Device was reset during suspend\n");
1870		goto err;
1871	}
1872
1873	/* query SRAM first in case we want event logging */
1874	iwl_mvm_read_d3_sram(mvm);
1875
1876	if (d0i3_first) {
1877		ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, 0, 0, NULL);
1878		if (ret < 0) {
1879			IWL_ERR(mvm, "Failed to send D0I3_END_CMD first (%d)\n",
1880				ret);
1881			goto err;
1882		}
1883	}
1884
1885	/*
1886	 * Query the current location and source from the D3 firmware so we
1887	 * can play it back when we re-intiailize the D0 firmware
1888	 */
1889	iwl_mvm_update_changed_regdom(mvm);
1890
1891	if (!unified_image)
1892		/*  Re-configure default SAR profile */
1893		iwl_mvm_sar_select_profile(mvm, 1, 1);
1894
1895	if (mvm->net_detect) {
1896		/* If this is a non-unified image, we restart the FW,
1897		 * so no need to stop the netdetect scan.  If that
1898		 * fails, continue and try to get the wake-up reasons,
1899		 * but trigger a HW restart by keeping a failure code
1900		 * in ret.
1901		 */
1902		if (unified_image)
1903			ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_NETDETECT,
1904						false);
1905
1906		iwl_mvm_query_netdetect_reasons(mvm, vif);
1907		/* has unlocked the mutex, so skip that */
1908		goto out;
1909	} else {
1910		keep = iwl_mvm_query_wakeup_reasons(mvm, vif);
1911#ifdef CONFIG_IWLWIFI_DEBUGFS
1912		if (keep)
1913			mvm->keep_vif = vif;
1914#endif
1915		/* has unlocked the mutex, so skip that */
1916		goto out_iterate;
1917	}
1918
1919err:
1920	iwl_mvm_free_nd(mvm);
1921	mutex_unlock(&mvm->mutex);
1922
1923out_iterate:
1924	if (!test)
1925		ieee80211_iterate_active_interfaces_rtnl(mvm->hw,
1926			IEEE80211_IFACE_ITER_NORMAL,
1927			iwl_mvm_d3_disconnect_iter, keep ? vif : NULL);
1928
1929out:
1930	/* no need to reset the device in unified images, if successful */
1931	if (unified_image && !ret) {
1932		/* nothing else to do if we already sent D0I3_END_CMD */
1933		if (d0i3_first)
1934			return 0;
1935
1936		ret = iwl_mvm_send_cmd_pdu(mvm, D0I3_END_CMD, 0, 0, NULL);
1937		if (!ret)
1938			return 0;
1939	}
1940
1941	/*
1942	 * Reconfigure the device in one of the following cases:
1943	 * 1. We are not using a unified image
1944	 * 2. We are using a unified image but had an error while exiting D3
1945	 */
1946	set_bit(IWL_MVM_STATUS_HW_RESTART_REQUESTED, &mvm->status);
1947	set_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status);
1948	/*
1949	 * When switching images we return 1, which causes mac80211
1950	 * to do a reconfig with IEEE80211_RECONFIG_TYPE_RESTART.
1951	 * This type of reconfig calls iwl_mvm_restart_complete(),
1952	 * where we unref the IWL_MVM_REF_UCODE_DOWN, so we need
1953	 * to take the reference here.
1954	 */
1955	iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1956
1957	return 1;
1958}
1959
1960static int iwl_mvm_resume_d3(struct iwl_mvm *mvm)
1961{
1962	iwl_trans_resume(mvm->trans);
1963
1964	return __iwl_mvm_resume(mvm, false);
1965}
1966
1967static int iwl_mvm_resume_d0i3(struct iwl_mvm *mvm)
1968{
1969	bool exit_now;
1970	enum iwl_d3_status d3_status;
1971	struct iwl_trans *trans = mvm->trans;
1972
1973	iwl_trans_d3_resume(trans, &d3_status, false, false);
1974
1975	/*
1976	 * make sure to clear D0I3_DEFER_WAKEUP before
1977	 * calling iwl_trans_resume(), which might wait
1978	 * for d0i3 exit completion.
1979	 */
1980	mutex_lock(&mvm->d0i3_suspend_mutex);
1981	__clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1982	exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1983					&mvm->d0i3_suspend_flags);
1984	mutex_unlock(&mvm->d0i3_suspend_mutex);
1985	if (exit_now) {
1986		IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1987		_iwl_mvm_exit_d0i3(mvm);
1988	}
1989
1990	iwl_trans_resume(trans);
1991
1992	if (iwl_mvm_enter_d0i3_on_suspend(mvm)) {
1993		int ret = iwl_mvm_exit_d0i3(mvm->hw->priv);
1994
1995		if (ret)
1996			return ret;
1997		/*
1998		 * d0i3 exit will be deferred until reconfig_complete.
1999		 * make sure there we are out of d0i3.
2000		 */
2001	}
2002	return 0;
2003}
2004
2005int iwl_mvm_resume(struct ieee80211_hw *hw)
2006{
2007	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2008	int ret;
2009
2010	if (mvm->trans->system_pm_mode == IWL_PLAT_PM_MODE_D0I3)
2011		ret = iwl_mvm_resume_d0i3(mvm);
2012	else
2013		ret = iwl_mvm_resume_d3(mvm);
2014
2015	mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2016
2017	iwl_fw_runtime_resume(&mvm->fwrt);
2018
2019	return ret;
2020}
2021
2022void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled)
2023{
2024	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2025
2026	device_set_wakeup_enable(mvm->trans->dev, enabled);
2027}
2028
2029#ifdef CONFIG_IWLWIFI_DEBUGFS
2030static int iwl_mvm_d3_test_open(struct inode *inode, struct file *file)
2031{
2032	struct iwl_mvm *mvm = inode->i_private;
2033	int err;
2034
2035	if (mvm->d3_test_active)
2036		return -EBUSY;
2037
2038	file->private_data = inode->i_private;
2039
2040	ieee80211_stop_queues(mvm->hw);
2041	synchronize_net();
2042
2043	mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_D3;
2044
2045	iwl_fw_runtime_suspend(&mvm->fwrt);
2046
2047	/* start pseudo D3 */
2048	rtnl_lock();
2049	err = __iwl_mvm_suspend(mvm->hw, mvm->hw->wiphy->wowlan_config, true);
2050	rtnl_unlock();
2051	if (err > 0)
2052		err = -EINVAL;
2053	if (err) {
2054		ieee80211_wake_queues(mvm->hw);
2055		return err;
2056	}
2057	mvm->d3_test_active = true;
2058	mvm->keep_vif = NULL;
2059	return 0;
2060}
2061
2062static ssize_t iwl_mvm_d3_test_read(struct file *file, char __user *user_buf,
2063				    size_t count, loff_t *ppos)
2064{
2065	struct iwl_mvm *mvm = file->private_data;
2066	u32 pme_asserted;
2067
2068	while (true) {
2069		/* read pme_ptr if available */
2070		if (mvm->d3_test_pme_ptr) {
2071			pme_asserted = iwl_trans_read_mem32(mvm->trans,
2072						mvm->d3_test_pme_ptr);
2073			if (pme_asserted)
2074				break;
2075		}
2076
2077		if (msleep_interruptible(100))
2078			break;
2079	}
2080
2081	return 0;
2082}
2083
2084static void iwl_mvm_d3_test_disconn_work_iter(void *_data, u8 *mac,
2085					      struct ieee80211_vif *vif)
2086{
2087	/* skip the one we keep connection on */
2088	if (_data == vif)
2089		return;
2090
2091	if (vif->type == NL80211_IFTYPE_STATION)
2092		ieee80211_connection_loss(vif);
2093}
2094
2095static int iwl_mvm_d3_test_release(struct inode *inode, struct file *file)
2096{
2097	struct iwl_mvm *mvm = inode->i_private;
2098	bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2099					 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2100
2101	mvm->d3_test_active = false;
2102
2103	rtnl_lock();
2104	__iwl_mvm_resume(mvm, true);
2105	rtnl_unlock();
2106
2107	iwl_fw_runtime_resume(&mvm->fwrt);
2108
2109	mvm->trans->system_pm_mode = IWL_PLAT_PM_MODE_DISABLED;
2110
2111	iwl_abort_notification_waits(&mvm->notif_wait);
2112	if (!unified_image) {
2113		int remaining_time = 10;
2114
2115		ieee80211_restart_hw(mvm->hw);
2116
2117		/* wait for restart and disconnect all interfaces */
2118		while (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2119		       remaining_time > 0) {
2120			remaining_time--;
2121			msleep(1000);
2122		}
2123
2124		if (remaining_time == 0)
2125			IWL_ERR(mvm, "Timed out waiting for HW restart!\n");
2126	}
2127
2128	ieee80211_iterate_active_interfaces_atomic(
2129		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
2130		iwl_mvm_d3_test_disconn_work_iter, mvm->keep_vif);
2131
2132	ieee80211_wake_queues(mvm->hw);
2133
2134	return 0;
2135}
2136
2137const struct file_operations iwl_dbgfs_d3_test_ops = {
2138	.llseek = no_llseek,
2139	.open = iwl_mvm_d3_test_open,
2140	.read = iwl_mvm_d3_test_read,
2141	.release = iwl_mvm_d3_test_release,
2142};
2143#endif