mac80211.c 109.8 KB
Newer Older
J
Johannes Berg 已提交
1 2 3 4 5 6 7
/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
8
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9
 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
J
Johannes Berg 已提交
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
26
 * in the file called COPYING.
J
Johannes Berg 已提交
27 28
 *
 * Contact Information:
29
 *  Intel Linux Wireless <linuxwifi@intel.com>
J
Johannes Berg 已提交
30 31 32 33
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
34
 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35
 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
J
Johannes Berg 已提交
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
70
#include <linux/ip.h>
71
#include <linux/if_arp.h>
72
#include <linux/devcoredump.h>
73
#include <linux/time.h>
J
Johannes Berg 已提交
74
#include <net/mac80211.h>
75
#include <net/ieee80211_radiotap.h>
76
#include <net/tcp.h>
J
Johannes Berg 已提交
77 78 79 80 81 82 83 84

#include "iwl-op-mode.h"
#include "iwl-io.h"
#include "mvm.h"
#include "sta.h"
#include "time-event.h"
#include "iwl-eeprom-parse.h"
#include "iwl-phy-db.h"
85
#include "testmode.h"
86 87
#include "iwl-fw-error-dump.h"
#include "iwl-prph.h"
88
#include "iwl-csr.h"
89
#include "iwl-nvm-parse.h"
90
#include "fw-dbg.h"
J
Johannes Berg 已提交
91 92 93 94

static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
	{
		.max = 1,
95
		.types = BIT(NL80211_IFTYPE_STATION),
J
Johannes Berg 已提交
96
	},
97 98
	{
		.max = 1,
99 100
		.types = BIT(NL80211_IFTYPE_AP) |
			BIT(NL80211_IFTYPE_P2P_CLIENT) |
101 102 103 104 105 106
			BIT(NL80211_IFTYPE_P2P_GO),
	},
	{
		.max = 1,
		.types = BIT(NL80211_IFTYPE_P2P_DEVICE),
	},
J
Johannes Berg 已提交
107 108 109 110
};

static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
	{
111
		.num_different_channels = 2,
J
Johannes Berg 已提交
112 113 114 115 116 117
		.max_interfaces = 3,
		.limits = iwl_mvm_limits,
		.n_limits = ARRAY_SIZE(iwl_mvm_limits),
	},
};

118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
#ifdef CONFIG_PM_SLEEP
static const struct nl80211_wowlan_tcp_data_token_feature
iwl_mvm_wowlan_tcp_token_feature = {
	.min_len = 0,
	.max_len = 255,
	.bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
};

static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
	.tok = &iwl_mvm_wowlan_tcp_token_feature,
	.data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
			    sizeof(struct ethhdr) -
			    sizeof(struct iphdr) -
			    sizeof(struct tcphdr),
	.data_interval_max = 65535, /* __le16 in API */
	.wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
			    sizeof(struct ethhdr) -
			    sizeof(struct iphdr) -
			    sizeof(struct tcphdr),
	.seq = true,
};
#endif

141
#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
/*
 * Use the reserved field to indicate magic values.
 * these values will only be used internally by the driver,
 * and won't make it to the fw (reserved will be 0).
 * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 *	be the vif's ip address. in case there is not a single
 *	ip address (0, or more than 1), this attribute will
 *	be skipped.
 * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 *	the LSB bytes of the vif's mac address
 */
enum {
	BC_FILTER_MAGIC_NONE = 0,
	BC_FILTER_MAGIC_IP,
	BC_FILTER_MAGIC_MAC,
};

159 160 161 162 163 164 165 166 167 168 169 170 171 172
static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
	{
		/* arp */
		.discard = 0,
		.frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
		.attrs = {
			{
				/* frame type - arp, hw type - ethernet */
				.offset_type =
					BCAST_FILTER_OFFSET_PAYLOAD_START,
				.offset = sizeof(rfc1042_header),
				.val = cpu_to_be32(0x08060001),
				.mask = cpu_to_be32(0xffffffff),
			},
173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206
			{
				/* arp dest ip */
				.offset_type =
					BCAST_FILTER_OFFSET_PAYLOAD_START,
				.offset = sizeof(rfc1042_header) + 2 +
					  sizeof(struct arphdr) +
					  ETH_ALEN + sizeof(__be32) +
					  ETH_ALEN,
				.mask = cpu_to_be32(0xffffffff),
				/* mark it as special field */
				.reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
			},
		},
	},
	{
		/* dhcp offer bcast */
		.discard = 0,
		.frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
		.attrs = {
			{
				/* udp dest port - 68 (bootp client)*/
				.offset_type = BCAST_FILTER_OFFSET_IP_END,
				.offset = offsetof(struct udphdr, dest),
				.val = cpu_to_be32(0x00440000),
				.mask = cpu_to_be32(0xffff0000),
			},
			{
				/* dhcp - lsb bytes of client hw address */
				.offset_type = BCAST_FILTER_OFFSET_IP_END,
				.offset = 38,
				.mask = cpu_to_be32(0xffffffff),
				/* mark it as special field */
				.reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
			},
207 208 209 210 211 212 213
		},
	},
	/* last filter must be empty */
	{},
};
#endif

214 215
void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
{
216
	if (!iwl_mvm_is_d0i3_supported(mvm))
217 218 219
		return;

	IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
220 221 222
	spin_lock_bh(&mvm->refs_lock);
	mvm->refs[ref_type]++;
	spin_unlock_bh(&mvm->refs_lock);
223 224 225 226 227
	iwl_trans_ref(mvm->trans);
}

void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
{
228
	if (!iwl_mvm_is_d0i3_supported(mvm))
229 230 231
		return;

	IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
232 233 234
	spin_lock_bh(&mvm->refs_lock);
	WARN_ON(!mvm->refs[ref_type]--);
	spin_unlock_bh(&mvm->refs_lock);
235 236 237
	iwl_trans_unref(mvm->trans);
}

238 239
static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
				     enum iwl_mvm_ref_type except_ref)
240
{
241
	int i, j;
242

243
	if (!iwl_mvm_is_d0i3_supported(mvm))
244 245
		return;

246 247 248
	spin_lock_bh(&mvm->refs_lock);
	for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
		if (except_ref == i || !mvm->refs[i])
249 250
			continue;

251 252 253 254 255
		IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
			      i, mvm->refs[i]);
		for (j = 0; j < mvm->refs[i]; j++)
			iwl_trans_unref(mvm->trans);
		mvm->refs[i] = 0;
256
	}
257
	spin_unlock_bh(&mvm->refs_lock);
258 259
}

260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279
bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
{
	int i;
	bool taken = false;

	if (!iwl_mvm_is_d0i3_supported(mvm))
		return true;

	spin_lock_bh(&mvm->refs_lock);
	for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
		if (mvm->refs[i]) {
			taken = true;
			break;
		}
	}
	spin_unlock_bh(&mvm->refs_lock);

	return taken;
}

280
int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
281 282 283 284 285 286 287 288 289 290 291 292 293 294
{
	iwl_mvm_ref(mvm, ref_type);

	if (!wait_event_timeout(mvm->d0i3_exit_waitq,
				!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
				HZ)) {
		WARN_ON_ONCE(1);
		iwl_mvm_unref(mvm, ref_type);
		return -EIO;
	}

	return 0;
}

295 296 297 298 299 300 301 302 303 304 305
static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
{
	int i;

	memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
	for (i = 0; i < NUM_PHY_CTX; i++) {
		mvm->phy_ctxts[i].id = i;
		mvm->phy_ctxts[i].ref = 0;
	}
}

306
struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
307
						  const char *alpha2,
308 309
						  enum iwl_mcc_source src_id,
						  bool *changed)
310 311 312 313 314 315 316 317
{
	struct ieee80211_regdomain *regd = NULL;
	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mcc_update_resp *resp;

	IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);

318
	lockdep_assert_held(&mvm->mutex);
319

320
	resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
321 322
	if (IS_ERR_OR_NULL(resp)) {
		IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
323
			      PTR_ERR_OR_ZERO(resp));
324
		goto out;
325 326
	}

327 328 329
	if (changed)
		*changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);

330
	regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
331 332 333
				      __le32_to_cpu(resp->n_channels),
				      resp->channels,
				      __le16_to_cpu(resp->mcc));
334 335
	/* Store the return source id */
	src_id = resp->source_id;
336 337 338
	kfree(resp);
	if (IS_ERR_OR_NULL(regd)) {
		IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
339
			      PTR_ERR_OR_ZERO(regd));
340
		goto out;
341 342
	}

343 344
	IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
		      regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
345
	mvm->lar_regdom_set = true;
346
	mvm->mcc_src = src_id;
347

348
out:
349 350 351
	return regd;
}

352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371
void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
{
	bool changed;
	struct ieee80211_regdomain *regd;

	if (!iwl_mvm_is_lar_supported(mvm))
		return;

	regd = iwl_mvm_get_current_regdomain(mvm, &changed);
	if (!IS_ERR_OR_NULL(regd)) {
		/* only update the regulatory core if changed */
		if (changed)
			regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);

		kfree(regd);
	}
}

struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
							  bool *changed)
372 373 374 375
{
	return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
				     iwl_mvm_is_wifi_mcc_supported(mvm) ?
				     MCC_SOURCE_GET_CURRENT :
376
				     MCC_SOURCE_OLD_FW, changed);
377 378 379 380 381 382
}

int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
{
	enum iwl_mcc_source used_src;
	struct ieee80211_regdomain *regd;
383 384
	int ret;
	bool changed;
385 386 387 388
	const struct ieee80211_regdomain *r =
			rtnl_dereference(mvm->hw->wiphy->regd);

	if (!r)
389
		return -ENOENT;
390 391 392 393 394

	/* save the last source in case we overwrite it below */
	used_src = mvm->mcc_src;
	if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
		/* Notify the firmware we support wifi location updates */
395
		regd = iwl_mvm_get_current_regdomain(mvm, NULL);
396 397 398 399 400
		if (!IS_ERR_OR_NULL(regd))
			kfree(regd);
	}

	/* Now set our last stored MCC and source */
401 402
	regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
				     &changed);
403 404 405
	if (IS_ERR_OR_NULL(regd))
		return -EIO;

406 407 408 409 410
	/* update cfg80211 if the regdomain was changed */
	if (changed)
		ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
	else
		ret = 0;
411

412 413
	kfree(regd);
	return ret;
414 415
}

J
Johannes Berg 已提交
416 417 418
int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
{
	struct ieee80211_hw *hw = mvm->hw;
419
	int num_mac, ret, i;
420 421 422 423 424 425
	static const u32 mvm_ciphers[] = {
		WLAN_CIPHER_SUITE_WEP40,
		WLAN_CIPHER_SUITE_WEP104,
		WLAN_CIPHER_SUITE_TKIP,
		WLAN_CIPHER_SUITE_CCMP,
	};
J
Johannes Berg 已提交
426 427

	/* Tell mac80211 our characteristics */
428 429 430 431 432 433 434 435 436 437 438 439 440
	ieee80211_hw_set(hw, SIGNAL_DBM);
	ieee80211_hw_set(hw, SPECTRUM_MGMT);
	ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
	ieee80211_hw_set(hw, QUEUE_CONTROL);
	ieee80211_hw_set(hw, WANT_MONITOR_VIF);
	ieee80211_hw_set(hw, SUPPORTS_PS);
	ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
	ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
	ieee80211_hw_set(hw, CONNECTION_MONITOR);
	ieee80211_hw_set(hw, CHANCTX_STA_CSA);
	ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
	ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
441
	ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
442
	ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
J
Johannes Berg 已提交
443

J
Johannes Berg 已提交
444 445 446
	if (mvm->trans->max_skb_frags)
		hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;

447
	hw->queues = mvm->first_agg_queue;
448
	hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
449 450
	hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
				    IEEE80211_RADIOTAP_MCS_HAVE_STBC;
451 452
	hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
		IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
J
Johannes Berg 已提交
453
	hw->rate_control_algorithm = "iwl-mvm-rs";
454 455
	hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
	hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
J
Johannes Berg 已提交
456

457 458 459 460 461
	BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 2);
	memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
	hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
	hw->wiphy->cipher_suites = mvm->ciphers;

J
Johannes Berg 已提交
462 463 464 465 466 467
	/*
	 * Enable 11w if advertised by firmware and software crypto
	 * is not enabled (as the firmware will interpret some mgmt
	 * packets, so enabling it with software crypto isn't safe)
	 */
	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
468
	    !iwlwifi_mod_params.sw_crypto) {
469
		ieee80211_hw_set(hw, MFP_CAPABLE);
470 471 472 473 474 475 476 477 478 479 480 481 482
		mvm->ciphers[hw->wiphy->n_cipher_suites] =
			WLAN_CIPHER_SUITE_AES_CMAC;
		hw->wiphy->n_cipher_suites++;
	}

	/* currently FW API supports only one optional cipher scheme */
	if (mvm->fw->cs[0].cipher) {
		mvm->hw->n_cipher_schemes = 1;
		mvm->hw->cipher_schemes = &mvm->fw->cs[0];
		mvm->ciphers[hw->wiphy->n_cipher_suites] =
			mvm->fw->cs[0].cipher;
		hw->wiphy->n_cipher_suites++;
	}
J
Johannes Berg 已提交
483

484
	ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
485 486
	hw->wiphy->features |=
		NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
487 488
		NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
		NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
489

J
Johannes Berg 已提交
490 491
	hw->sta_data_size = sizeof(struct iwl_mvm_sta);
	hw->vif_data_size = sizeof(struct iwl_mvm_vif);
492
	hw->chanctx_data_size = sizeof(u16);
J
Johannes Berg 已提交
493 494

	hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
495 496 497
		BIT(NL80211_IFTYPE_P2P_CLIENT) |
		BIT(NL80211_IFTYPE_AP) |
		BIT(NL80211_IFTYPE_P2P_GO) |
498 499
		BIT(NL80211_IFTYPE_P2P_DEVICE) |
		BIT(NL80211_IFTYPE_ADHOC);
J
Johannes Berg 已提交
500

501
	hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
502 503 504 505 506 507
	hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
	if (iwl_mvm_is_lar_supported(mvm))
		hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
	else
		hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
					       REGULATORY_DISABLE_BEACON_HINTS;
J
Johannes Berg 已提交
508

509 510 511
	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
		hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;

512
	hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
513

J
Johannes Berg 已提交
514 515 516 517
	hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
	hw->wiphy->n_iface_combinations =
		ARRAY_SIZE(iwl_mvm_iface_combinations);

518
	hw->wiphy->max_remain_on_channel_duration = 10000;
J
Johannes Berg 已提交
519
	hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
520 521
	/* we can compensate an offset of up to 3 channels = 15 MHz */
	hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
J
Johannes Berg 已提交
522 523 524 525 526

	/* Extract MAC address */
	memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
	hw->wiphy->addresses = mvm->addresses;
	hw->wiphy->n_addresses = 1;
527 528 529 530 531 532 533

	/* Extract additional MAC addresses if available */
	num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
		min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;

	for (i = 1; i < num_mac; i++) {
		memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
J
Johannes Berg 已提交
534
		       ETH_ALEN);
535
		mvm->addresses[i].addr[5]++;
J
Johannes Berg 已提交
536 537 538
		hw->wiphy->n_addresses++;
	}

539 540
	iwl_mvm_reset_phy_ctxts(mvm);

541
	hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
542

J
Johannes Berg 已提交
543 544
	hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;

545
	BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
546 547 548
	BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
		     IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));

549
	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
550 551 552 553
		mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
	else
		mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;

J
Johannes Berg 已提交
554 555 556
	if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
		hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
			&mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
557
	if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) {
J
Johannes Berg 已提交
558 559 560
		hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
			&mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];

561 562 563 564
		if (fw_has_capa(&mvm->fw->ucode_capa,
				IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
		    fw_has_api(&mvm->fw->ucode_capa,
			       IWL_UCODE_TLV_API_LQ_SS_PARAMS))
565 566 567 568
			hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
				IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
	}

J
Johannes Berg 已提交
569 570
	hw->wiphy->hw_version = mvm->trans->hw_id;

571
	if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
J
Johannes Berg 已提交
572 573 574 575
		hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
	else
		hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;

576 577 578 579 580 581
	hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
	hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
	hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
	/* we create the 802.11 header and zero length SSID IE. */
	hw->wiphy->max_sched_scan_ie_len =
		SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
582 583 584 585 586 587 588 589
	hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
	hw->wiphy->max_sched_scan_plan_interval = U16_MAX;

	/*
	 * the firmware uses u8 for num of iterations, but 0xff is saved for
	 * infinite loop, so the maximum number of iterations is actually 254.
	 */
	hw->wiphy->max_sched_scan_plan_iterations = 254;
590

J
Johannes Berg 已提交
591
	hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
592
			       NL80211_FEATURE_LOW_PRIORITY_SCAN |
593 594
			       NL80211_FEATURE_P2P_GO_OPPPS |
			       NL80211_FEATURE_DYNAMIC_SMPS |
595 596
			       NL80211_FEATURE_STATIC_SMPS |
			       NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
J
Johannes Berg 已提交
597

598 599
	if (fw_has_capa(&mvm->fw->ucode_capa,
			IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
600
		hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
601 602
	if (fw_has_capa(&mvm->fw->ucode_capa,
			IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
603
		hw->wiphy->features |= NL80211_FEATURE_QUIET;
604

605 606
	if (fw_has_capa(&mvm->fw->ucode_capa,
			IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
607 608 609
		hw->wiphy->features |=
			NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;

610 611
	if (fw_has_capa(&mvm->fw->ucode_capa,
			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
612 613
		hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;

J
Johannes Berg 已提交
614 615 616
	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;

#ifdef CONFIG_PM_SLEEP
617 618 619 620
	if (iwl_mvm_is_d0i3_supported(mvm) &&
	    device_can_wakeup(mvm->trans->dev)) {
		mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
		hw->wiphy->wowlan = &mvm->wowlan;
621 622 623
	}

	if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
J
Johannes Berg 已提交
624 625 626
	    mvm->trans->ops->d3_suspend &&
	    mvm->trans->ops->d3_resume &&
	    device_can_wakeup(mvm->trans->dev)) {
627 628 629 630 631
		mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
				     WIPHY_WOWLAN_DISCONNECT |
				     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
				     WIPHY_WOWLAN_RFKILL_RELEASE |
				     WIPHY_WOWLAN_NET_DETECT;
J
Johannes Berg 已提交
632
		if (!iwlwifi_mod_params.sw_crypto)
633 634 635 636 637 638 639
			mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
					     WIPHY_WOWLAN_GTK_REKEY_FAILURE |
					     WIPHY_WOWLAN_4WAY_HANDSHAKE;

		mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
		mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
		mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
640
		mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
641 642
		mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
		hw->wiphy->wowlan = &mvm->wowlan;
J
Johannes Berg 已提交
643 644 645
	}
#endif

646 647 648 649 650
#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
	/* assign default bcast filtering configuration */
	mvm->bcast_filters = iwl_mvm_default_bcast_filters;
#endif

J
Johannes Berg 已提交
651 652 653 654
	ret = iwl_mvm_leds_init(mvm);
	if (ret)
		return ret;

655 656
	if (fw_has_capa(&mvm->fw->ucode_capa,
			IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
A
Arik Nemtsov 已提交
657 658
		IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
		hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
659
		ieee80211_hw_set(hw, TDLS_WIDER_BW);
A
Arik Nemtsov 已提交
660 661
	}

662 663
	if (fw_has_capa(&mvm->fw->ucode_capa,
			IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
664 665 666 667
		IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
		hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
	}

668 669 670 671
	hw->netdev_features |= mvm->cfg->features;
	if (!iwl_mvm_is_csum_supported(mvm))
		hw->netdev_features &= ~NETIF_F_RXCSUM;

672
	if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
673 674
		hw->netdev_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
			NETIF_F_TSO | NETIF_F_TSO6;
675

676 677 678 679 680
	ret = ieee80211_register_hw(mvm->hw);
	if (ret)
		iwl_mvm_leds_exit(mvm);

	return ret;
J
Johannes Berg 已提交
681 682
}

683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
			     struct ieee80211_sta *sta,
			     struct sk_buff *skb)
{
	struct iwl_mvm_sta *mvmsta;
	bool defer = false;

	/*
	 * double check the IN_D0I3 flag both before and after
	 * taking the spinlock, in order to prevent taking
	 * the spinlock when not needed.
	 */
	if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
		return false;

	spin_lock(&mvm->d0i3_tx_lock);
	/*
	 * testing the flag again ensures the skb dequeue
	 * loop (on d0i3 exit) hasn't run yet.
	 */
	if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
		goto out;

	mvmsta = iwl_mvm_sta_from_mac80211(sta);
	if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
	    mvmsta->sta_id != mvm->d0i3_ap_sta_id)
		goto out;

	__skb_queue_tail(&mvm->d0i3_tx, skb);
	ieee80211_stop_queues(mvm->hw);

	/* trigger wakeup */
	iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
	iwl_mvm_unref(mvm, IWL_MVM_REF_TX);

	defer = true;
out:
	spin_unlock(&mvm->d0i3_tx_lock);
	return defer;
}

J
Johannes Berg 已提交
724 725 726 727 728
static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
			   struct ieee80211_tx_control *control,
			   struct sk_buff *skb)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
729 730 731
	struct ieee80211_sta *sta = control->sta;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (void *)skb->data;
J
Johannes Berg 已提交
732

733 734
	if (iwl_mvm_is_radio_killed(mvm)) {
		IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
J
Johannes Berg 已提交
735 736 737
		goto drop;
	}

738
	if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
739 740
	    !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
	    !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
J
Johannes Berg 已提交
741 742
		goto drop;

743 744 745 746 747 748 749 750 751
	/* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
	if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
		     ieee80211_is_mgmt(hdr->frame_control) &&
		     !ieee80211_is_deauth(hdr->frame_control) &&
		     !ieee80211_is_disassoc(hdr->frame_control) &&
		     !ieee80211_is_action(hdr->frame_control)))
		sta = NULL;

	if (sta) {
752 753
		if (iwl_mvm_defer_tx(mvm, sta, skb))
			return;
754
		if (iwl_mvm_tx_skb(mvm, skb, sta))
J
Johannes Berg 已提交
755 756 757 758 759 760 761 762 763 764 765
			goto drop;
		return;
	}

	if (iwl_mvm_tx_skb_non_sta(mvm, skb))
		goto drop;
	return;
 drop:
	ieee80211_free_txskb(hw, skb);
}

766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783
static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
{
	if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
		return false;
	return true;
}

static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
{
	if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
		return false;
	if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
		return true;

	/* enabled by default */
	return true;
}

784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837
#define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)	\
	do {							\
		if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))	\
			break;					\
		iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);	\
	} while (0)

static void
iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
			    enum ieee80211_ampdu_mlme_action action)
{
	struct iwl_fw_dbg_trigger_tlv *trig;
	struct iwl_fw_dbg_trigger_ba *ba_trig;

	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
		return;

	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
	ba_trig = (void *)trig->data;

	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
		return;

	switch (action) {
	case IEEE80211_AMPDU_TX_OPERATIONAL: {
		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
		struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];

		CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
				 "TX AGG START: MAC %pM tid %d ssn %d\n",
				 sta->addr, tid, tid_data->ssn);
		break;
		}
	case IEEE80211_AMPDU_TX_STOP_CONT:
		CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
				 "TX AGG STOP: MAC %pM tid %d\n",
				 sta->addr, tid);
		break;
	case IEEE80211_AMPDU_RX_START:
		CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
				 "RX AGG START: MAC %pM tid %d ssn %d\n",
				 sta->addr, tid, rx_ba_ssn);
		break;
	case IEEE80211_AMPDU_RX_STOP:
		CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
				 "RX AGG STOP: MAC %pM tid %d\n",
				 sta->addr, tid);
		break;
	default:
		break;
	}
}

J
Johannes Berg 已提交
838 839
static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif,
840
				    struct ieee80211_ampdu_params *params)
J
Johannes Berg 已提交
841 842 843
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;
844
	bool tx_agg_ref = false;
845 846 847 848 849
	struct ieee80211_sta *sta = params->sta;
	enum ieee80211_ampdu_mlme_action action = params->action;
	u16 tid = params->tid;
	u16 *ssn = &params->ssn;
	u8 buf_size = params->buf_size;
850
	bool amsdu = params->amsdu;
J
Johannes Berg 已提交
851 852 853 854 855 856 857

	IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
		     sta->addr, tid, action);

	if (!(mvm->nvm_data->sku_cap_11n_enable))
		return -EACCES;

858
	/* return from D0i3 before starting a new Tx aggregation */
859 860 861 862 863 864
	switch (action) {
	case IEEE80211_AMPDU_TX_START:
	case IEEE80211_AMPDU_TX_STOP_CONT:
	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
	case IEEE80211_AMPDU_TX_OPERATIONAL:
865
		/*
866 867 868 869 870 871
		 * for tx start, wait synchronously until D0i3 exit to
		 * get the correct sequence number for the tid.
		 * additionally, some other ampdu actions use direct
		 * target access, which is not handled automatically
		 * by the trans layer (unlike commands), so wait for
		 * d0i3 exit in these cases as well.
872
		 */
873 874 875 876 877
		ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
		if (ret)
			return ret;

		tx_agg_ref = true;
878 879 880
		break;
	default:
		break;
881 882
	}

J
Johannes Berg 已提交
883 884 885 886
	mutex_lock(&mvm->mutex);

	switch (action) {
	case IEEE80211_AMPDU_RX_START:
887
		if (!iwl_enable_rx_ampdu(mvm->cfg)) {
J
Johannes Berg 已提交
888 889 890
			ret = -EINVAL;
			break;
		}
891
		ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size);
J
Johannes Berg 已提交
892 893
		break;
	case IEEE80211_AMPDU_RX_STOP:
894
		ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size);
J
Johannes Berg 已提交
895 896
		break;
	case IEEE80211_AMPDU_TX_START:
897
		if (!iwl_enable_tx_ampdu(mvm->cfg)) {
898 899 900
			ret = -EINVAL;
			break;
		}
J
Johannes Berg 已提交
901 902 903
		ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
		break;
	case IEEE80211_AMPDU_TX_STOP_CONT:
904 905
		ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
		break;
J
Johannes Berg 已提交
906 907
	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
908
		ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
J
Johannes Berg 已提交
909 910
		break;
	case IEEE80211_AMPDU_TX_OPERATIONAL:
911 912
		ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
					      buf_size, amsdu);
J
Johannes Berg 已提交
913 914 915 916 917 918
		break;
	default:
		WARN_ON_ONCE(1);
		ret = -EINVAL;
		break;
	}
919 920 921 922 923 924 925 926 927 928

	if (!ret) {
		u16 rx_ba_ssn = 0;

		if (action == IEEE80211_AMPDU_RX_START)
			rx_ba_ssn = *ssn;

		iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
					    rx_ba_ssn, action);
	}
J
Johannes Berg 已提交
929 930
	mutex_unlock(&mvm->mutex);

931 932 933 934 935 936 937
	/*
	 * If the tid is marked as started, we won't use it for offloaded
	 * traffic on the next D0i3 entry. It's safe to unref.
	 */
	if (tx_agg_ref)
		iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);

J
Johannes Berg 已提交
938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953
	return ret;
}

static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
				     struct ieee80211_vif *vif)
{
	struct iwl_mvm *mvm = data;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	mvmvif->uploaded = false;
	mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;

	spin_lock_bh(&mvm->time_event_lock);
	iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
	spin_unlock_bh(&mvm->time_event_lock);

954
	mvmvif->phy_ctxt = NULL;
955
	memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
J
Johannes Berg 已提交
956 957 958 959
}

static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
{
960 961 962 963
	/* clear the D3 reconfig, we only need it to avoid dumping a
	 * firmware coredump on reconfiguration, we shouldn't do that
	 * on D3->D0 transition
	 */
964 965
	if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
		mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
966
		iwl_mvm_fw_error_dump(mvm);
967
	}
968

969 970 971 972 973
	/* cleanup all stale references (scan, roc), but keep the
	 * ucode_down ref until reconfig is complete
	 */
	iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);

J
Johannes Berg 已提交
974 975
	iwl_trans_stop_device(mvm->trans);

976
	mvm->scan_status = 0;
977
	mvm->ps_disabled = false;
978
	mvm->calibrating = false;
J
Johannes Berg 已提交
979 980

	/* just in case one was running */
981
	iwl_mvm_cleanup_roc_te(mvm);
J
Johannes Berg 已提交
982 983
	ieee80211_remain_on_channel_expired(mvm->hw);

984 985 986 987 988
	/*
	 * cleanup all interfaces, even inactive ones, as some might have
	 * gone down during the HW restart
	 */
	ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
J
Johannes Berg 已提交
989

990
	mvm->p2p_device_vif = NULL;
991
	mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
992 993

	iwl_mvm_reset_phy_ctxts(mvm);
994
	memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
J
Johannes Berg 已提交
995
	memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
996
	memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
997 998 999 1000 1001 1002
	memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
	memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
	memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
	memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
	memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
	memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
J
Johannes Berg 已提交
1003 1004 1005

	ieee80211_wake_queues(mvm->hw);

1006 1007 1008
	/* clear any stale d0i3 state */
	clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);

J
Johannes Berg 已提交
1009
	mvm->vif_count = 0;
1010
	mvm->rx_ba_sessions = 0;
1011
	mvm->fw_dbg_conf = FW_DBG_INVALID;
1012 1013 1014

	/* keep statistics ticking */
	iwl_mvm_accu_radio_stats(mvm);
J
Johannes Berg 已提交
1015 1016
}

1017
int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
1018 1019 1020
{
	int ret;

1021
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
1022

1023 1024
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		/* Clean up some internal and mac80211 state on restart */
J
Johannes Berg 已提交
1025
		iwl_mvm_restart_cleanup(mvm);
1026 1027 1028 1029 1030 1031 1032 1033 1034
	} else {
		/* Hold the reference to prevent runtime suspend while
		 * the start procedure runs.  It's a bit confusing
		 * that the UCODE_DOWN reference is taken, but it just
		 * means "UCODE is not UP yet". ( TODO: rename this
		 * reference).
		 */
		iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
	}
J
Johannes Berg 已提交
1035
	ret = iwl_mvm_up(mvm);
1036 1037 1038 1039 1040 1041 1042 1043 1044 1045

	if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		/* Something went wrong - we need to finish some cleanup
		 * that normally iwl_mvm_mac_restart_complete() below
		 * would do.
		 */
		clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
		iwl_mvm_d0i3_enable_tx(mvm, NULL);
	}

1046 1047 1048 1049 1050 1051 1052 1053
	return ret;
}

static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
	/* Some hw restart cleanups must not hold the mutex */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		/*
		 * Make sure we are out of d0i3. This is needed
		 * to make sure the reference accounting is correct
		 * (and there is no stale d0i3_exit_work).
		 */
		wait_event_timeout(mvm->d0i3_exit_waitq,
				   !test_bit(IWL_MVM_STATUS_IN_D0I3,
					     &mvm->status),
				   HZ);
	}

1067 1068
	mutex_lock(&mvm->mutex);
	ret = __iwl_mvm_mac_start(mvm);
J
Johannes Berg 已提交
1069 1070 1071 1072 1073
	mutex_unlock(&mvm->mutex);

	return ret;
}

1074
static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
1075 1076 1077 1078 1079 1080
{
	int ret;

	mutex_lock(&mvm->mutex);

	clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1081
	iwl_mvm_d0i3_enable_tx(mvm, NULL);
1082
	ret = iwl_mvm_update_quotas(mvm, true, NULL);
J
Johannes Berg 已提交
1083 1084 1085 1086
	if (ret)
		IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
			ret);

1087 1088 1089
	/* allow transport/FW low power modes */
	iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);

1090 1091 1092 1093 1094 1095
	/*
	 * If we have TDLS peers, remove them. We don't know the last seqno/PN
	 * of packets the FW sent out, so we must reconnect.
	 */
	iwl_mvm_teardown_tdls_peers(mvm);

J
Johannes Berg 已提交
1096 1097 1098
	mutex_unlock(&mvm->mutex);
}

1099 1100
static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
{
1101 1102 1103 1104 1105 1106 1107
	if (iwl_mvm_is_d0i3_supported(mvm) &&
	    iwl_mvm_enter_d0i3_on_suspend(mvm))
		WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
					      !test_bit(IWL_MVM_STATUS_IN_D0I3,
							&mvm->status),
					      HZ),
			  "D0i3 exit on resume timed out\n");
1108 1109
}

1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
static void
iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
			      enum ieee80211_reconfig_type reconfig_type)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	switch (reconfig_type) {
	case IEEE80211_RECONFIG_TYPE_RESTART:
		iwl_mvm_restart_complete(mvm);
		break;
	case IEEE80211_RECONFIG_TYPE_SUSPEND:
1121
		iwl_mvm_resume_complete(mvm);
1122 1123 1124 1125
		break;
	}
}

1126
void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
1127
{
1128
	lockdep_assert_held(&mvm->mutex);
1129

1130 1131 1132 1133 1134
	/* firmware counters are obviously reset now, but we shouldn't
	 * partially track so also clear the fw_reset_accu counters.
	 */
	memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));

J
Johannes Berg 已提交
1135 1136 1137 1138 1139 1140
	/* async_handlers_wk is now blocked */

	/*
	 * The work item could be running or queued if the
	 * ROC time event stops just as we get here.
	 */
1141
	flush_work(&mvm->roc_done_wk);
J
Johannes Berg 已提交
1142 1143 1144 1145 1146 1147 1148

	iwl_trans_stop_device(mvm->trans);

	iwl_mvm_async_handlers_purge(mvm);
	/* async_handlers_list is empty and will stay empty: HW is stopped */

	/* the fw is stopped, the aux sta is dead: clean up driver state */
1149
	iwl_mvm_del_aux_sta(mvm);
J
Johannes Berg 已提交
1150

1151 1152 1153
	/*
	 * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
	 * won't be called in this case).
1154 1155
	 * But make sure to cleanup interfaces that have gone down before/during
	 * HW restart was requested.
1156
	 */
1157 1158 1159
	if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
		ieee80211_iterate_interfaces(mvm->hw, 0,
					     iwl_mvm_cleanup_iterator, mvm);
1160

1161 1162 1163
	/* We shouldn't have any UIDs still set.  Loop over all the UIDs to
	 * make sure there's nothing left there and warn if any is found.
	 */
1164
	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1165 1166
		int i;

1167
		for (i = 0; i < mvm->max_scans; i++) {
1168 1169 1170 1171
			if (WARN_ONCE(mvm->scan_uid_status[i],
				      "UMAC scan UID %d status was not cleaned\n",
				      i))
				mvm->scan_uid_status[i] = 0;
1172 1173 1174
		}
	}

1175
	mvm->ucode_loaded = false;
1176
}
1177

1178 1179 1180 1181 1182 1183
static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	flush_work(&mvm->d0i3_exit_work);
	flush_work(&mvm->async_handlers_wk);
1184
	cancel_delayed_work_sync(&mvm->fw_dump_wk);
1185
	iwl_mvm_free_fw_dump_desc(mvm);
1186 1187 1188

	mutex_lock(&mvm->mutex);
	__iwl_mvm_mac_stop(mvm);
J
Johannes Berg 已提交
1189 1190 1191 1192 1193 1194 1195 1196 1197
	mutex_unlock(&mvm->mutex);

	/*
	 * The worker might have been waiting for the mutex, let it run and
	 * discover that its list is now empty.
	 */
	cancel_work_sync(&mvm->async_handlers_wk);
}

1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211
static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
{
	u16 i;

	lockdep_assert_held(&mvm->mutex);

	for (i = 0; i < NUM_PHY_CTX; i++)
		if (!mvm->phy_ctxts[i].ref)
			return &mvm->phy_ctxts[i];

	IWL_ERR(mvm, "No available PHY context\n");
	return NULL;
}

1212 1213 1214 1215
static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
				s16 tx_power)
{
	struct iwl_dev_tx_power_cmd cmd = {
1216 1217
		.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
		.v2.mac_context_id =
1218
			cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1219
		.v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1220
	};
1221
	int len = sizeof(cmd);
1222 1223

	if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1224
		cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1225

1226 1227 1228 1229
	if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
		len = sizeof(cmd.v2);

	return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1230 1231
}

J
Johannes Berg 已提交
1232 1233 1234 1235 1236 1237 1238
static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
				     struct ieee80211_vif *vif)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

1239 1240
	mvmvif->mvm = mvm;

1241 1242 1243 1244 1245 1246 1247 1248 1249
	/*
	 * make sure D0i3 exit is completed, otherwise a target access
	 * during tx queue configuration could be done when still in
	 * D0i3 state.
	 */
	ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
	if (ret)
		return ret;

J
Johannes Berg 已提交
1250 1251 1252 1253 1254 1255 1256 1257
	/*
	 * Not much to do here. The stack will not allow interface
	 * types or combinations that we didn't advertise, so we
	 * don't really have to check the types.
	 */

	mutex_lock(&mvm->mutex);

1258 1259 1260 1261 1262
	/* make sure that beacon statistics don't go backwards with FW reset */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
		mvmvif->beacon_stats.accu_num_beacons +=
			mvmvif->beacon_stats.num_beacons;

1263
	/* Allocate resources for the MAC context, and add it to the fw  */
J
Johannes Berg 已提交
1264 1265 1266 1267
	ret = iwl_mvm_mac_ctxt_init(mvm, vif);
	if (ret)
		goto out_unlock;

1268
	/* Counting number of interfaces is needed for legacy PM */
1269 1270 1271
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count++;

J
Johannes Berg 已提交
1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282
	/*
	 * The AP binding flow can be done only after the beacon
	 * template is configured (which happens only in the mac80211
	 * start_ap() flow), and adding the broadcast station can happen
	 * only after the binding.
	 * In addition, since modifying the MAC before adding a bcast
	 * station is not allowed by the FW, delay the adding of MAC context to
	 * the point where we can also add the bcast station.
	 * In short: there's not much we can do at this point, other than
	 * allocating resources :)
	 */
J
Johannes Berg 已提交
1283 1284
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1285
		ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1286 1287 1288 1289 1290
		if (ret) {
			IWL_ERR(mvm, "Failed to allocate bcast sta\n");
			goto out_release;
		}

1291
		iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1292 1293 1294
		goto out_unlock;
	}

1295 1296
	mvmvif->features |= hw->netdev_features;

J
Johannes Berg 已提交
1297 1298 1299 1300
	ret = iwl_mvm_mac_ctxt_add(mvm, vif);
	if (ret)
		goto out_release;

1301
	ret = iwl_mvm_power_update_mac(mvm);
1302
	if (ret)
1303
		goto out_remove_mac;
J
Johannes Berg 已提交
1304

1305
	/* beacon filtering */
E
Emmanuel Grumbach 已提交
1306
	ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1307 1308 1309
	if (ret)
		goto out_remove_mac;

1310
	if (!mvm->bf_allowed_vif &&
1311
	    vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1312
		mvm->bf_allowed_vif = mvmvif;
1313 1314
		vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
				     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1315 1316
	}

J
Johannes Berg 已提交
1317 1318 1319 1320 1321 1322 1323
	/*
	 * P2P_DEVICE interface does not have a channel context assigned to it,
	 * so a dedicated PHY context is allocated to it and the corresponding
	 * MAC context is bound to it at this stage.
	 */
	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {

1324 1325 1326
		mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
		if (!mvmvif->phy_ctxt) {
			ret = -ENOSPC;
1327
			goto out_free_bf;
1328
		}
J
Johannes Berg 已提交
1329

1330
		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1331 1332
		ret = iwl_mvm_binding_add_vif(mvm, vif);
		if (ret)
1333
			goto out_unref_phy;
J
Johannes Berg 已提交
1334

1335
		ret = iwl_mvm_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1336 1337 1338 1339 1340 1341 1342 1343
		if (ret)
			goto out_unbind;

		/* Save a pointer to p2p device vif, so it can later be used to
		 * update the p2p device MAC when a GO is started/stopped */
		mvm->p2p_device_vif = vif;
	}

1344
	iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1345 1346 1347 1348
	goto out_unlock;

 out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
1349
 out_unref_phy:
1350
	iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1351 1352 1353
 out_free_bf:
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1354 1355
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1356
	}
J
Johannes Berg 已提交
1357 1358 1359 1360
 out_remove_mac:
	mvmvif->phy_ctxt = NULL;
	iwl_mvm_mac_ctxt_remove(mvm, vif);
 out_release:
1361 1362
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count--;
1363

J
Johannes Berg 已提交
1364 1365 1366 1367
	iwl_mvm_mac_ctxt_release(mvm, vif);
 out_unlock:
	mutex_unlock(&mvm->mutex);

1368 1369
	iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);

J
Johannes Berg 已提交
1370 1371 1372
	return ret;
}

1373 1374
static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1375
{
1376
	u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
J
Johannes Berg 已提交
1377 1378

	if (tfd_msk) {
1379 1380 1381 1382 1383 1384 1385 1386 1387
		/*
		 * mac80211 first removes all the stations of the vif and
		 * then removes the vif. When it removes a station it also
		 * flushes the AMPDU session. So by now, all the AMPDU sessions
		 * of all the stations of this vif are closed, and the queues
		 * of these AMPDU sessions are properly closed.
		 * We still need to take care of the shared queues of the vif.
		 * Flush them here.
		 */
J
Johannes Berg 已提交
1388
		mutex_lock(&mvm->mutex);
1389
		iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
J
Johannes Berg 已提交
1390
		mutex_unlock(&mvm->mutex);
1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405

		/*
		 * There are transports that buffer a few frames in the host.
		 * For these, the flush above isn't enough since while we were
		 * flushing, the transport might have sent more frames to the
		 * device. To solve this, wait here until the transport is
		 * empty. Technically, this could have replaced the flush
		 * above, but flush is much faster than draining. So flush
		 * first, and drain to make sure we have no frames in the
		 * transport anymore.
		 * If a station still had frames on the shared queues, it is
		 * already marked as draining, so to complete the draining, we
		 * just need to wait until the transport is empty.
		 */
		iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
J
Johannes Berg 已提交
1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419
	}

	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		/*
		 * Flush the ROC worker which will flush the OFFCHANNEL queue.
		 * We assume here that all the packets sent to the OFFCHANNEL
		 * queue are sent in ROC session.
		 */
		flush_work(&mvm->roc_done_wk);
	} else {
		/*
		 * By now, all the AC queues are empty. The AGG queues are
		 * empty too. We already got all the Tx responses for all the
		 * packets in the queues. The drain work can have been
1420
		 * triggered. Flush it.
J
Johannes Berg 已提交
1421 1422 1423
		 */
		flush_work(&mvm->sta_drained_wk);
	}
1424 1425 1426 1427 1428 1429 1430 1431 1432
}

static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
					 struct ieee80211_vif *vif)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	iwl_mvm_prepare_mac_removal(mvm, vif);
J
Johannes Berg 已提交
1433 1434 1435

	mutex_lock(&mvm->mutex);

1436 1437
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1438 1439
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1440 1441
	}

1442 1443
	iwl_mvm_vif_dbgfs_clean(mvm, vif);

J
Johannes Berg 已提交
1444 1445
	/*
	 * For AP/GO interface, the tear down of the resources allocated to the
1446
	 * interface is be handled as part of the stop_ap flow.
J
Johannes Berg 已提交
1447
	 */
J
Johannes Berg 已提交
1448 1449
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1450 1451 1452 1453 1454 1455
#ifdef CONFIG_NL80211_TESTMODE
		if (vif == mvm->noa_vif) {
			mvm->noa_vif = NULL;
			mvm->noa_duration = 0;
		}
#endif
1456
		iwl_mvm_dealloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1457 1458 1459 1460 1461
		goto out_release;
	}

	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		mvm->p2p_device_vif = NULL;
1462
		iwl_mvm_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1463
		iwl_mvm_binding_remove_vif(mvm, vif);
1464
		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1465 1466 1467
		mvmvif->phy_ctxt = NULL;
	}

1468
	if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
J
Johannes Berg 已提交
1469
		mvm->vif_count--;
1470

1471
	iwl_mvm_power_update_mac(mvm);
J
Johannes Berg 已提交
1472 1473 1474 1475 1476 1477 1478 1479
	iwl_mvm_mac_ctxt_remove(mvm, vif);

out_release:
	iwl_mvm_mac_ctxt_release(mvm, vif);
	mutex_unlock(&mvm->mutex);
}

static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1480
{
J
Johannes Berg 已提交
1481 1482 1483
	return 0;
}

1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508
struct iwl_mvm_mc_iter_data {
	struct iwl_mvm *mvm;
	int port_id;
};

static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
				      struct ieee80211_vif *vif)
{
	struct iwl_mvm_mc_iter_data *data = _data;
	struct iwl_mvm *mvm = data->mvm;
	struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
	int ret, len;

	/* if we don't have free ports, mcast frames will be dropped */
	if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
		return;

	if (vif->type != NL80211_IFTYPE_STATION ||
	    !vif->bss_conf.assoc)
		return;

	cmd->port_id = data->port_id++;
	memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
	len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);

1509
	ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1510 1511 1512 1513 1514 1515 1516 1517
	if (ret)
		IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
}

static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
{
	struct iwl_mvm_mc_iter_data iter_data = {
		.mvm = mvm,
1518 1519
	};

1520 1521 1522 1523 1524
	lockdep_assert_held(&mvm->mutex);

	if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
		return;

1525
	ieee80211_iterate_active_interfaces_atomic(
1526 1527
		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
		iwl_mvm_mc_iface_iterator, &iter_data);
1528 1529
}

1530 1531
static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
				     struct netdev_hw_addr_list *mc_list)
J
Johannes Berg 已提交
1532
{
1533 1534 1535
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mcast_filter_cmd *cmd;
	struct netdev_hw_addr *addr;
1536 1537
	int addr_count;
	bool pass_all;
1538 1539
	int len;

1540 1541 1542 1543
	addr_count = netdev_hw_addr_list_count(mc_list);
	pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
		   IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
	if (pass_all)
1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564
		addr_count = 0;

	len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
	cmd = kzalloc(len, GFP_ATOMIC);
	if (!cmd)
		return 0;

	if (pass_all) {
		cmd->pass_all = 1;
		return (u64)(unsigned long)cmd;
	}

	netdev_hw_addr_list_for_each(addr, mc_list) {
		IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
				   cmd->count, addr->addr);
		memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
		       addr->addr, ETH_ALEN);
		cmd->count++;
	}

	return (u64)(unsigned long)cmd;
J
Johannes Berg 已提交
1565 1566 1567 1568 1569 1570 1571
}

static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
				     unsigned int changed_flags,
				     unsigned int *total_flags,
				     u64 multicast)
{
1572 1573
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
J
Johannes Berg 已提交
1574

1575
	mutex_lock(&mvm->mutex);
1576

1577 1578 1579
	/* replace previous configuration */
	kfree(mvm->mcast_filter_cmd);
	mvm->mcast_filter_cmd = cmd;
1580

1581 1582
	if (!cmd)
		goto out;
1583

1584 1585 1586 1587
	iwl_mvm_recalc_multicast(mvm);
out:
	mutex_unlock(&mvm->mutex);
	*total_flags = 0;
1588 1589
}

1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610
static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
					struct ieee80211_vif *vif,
					unsigned int filter_flags,
					unsigned int changed_flags)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	/* We support only filter for probe requests */
	if (!(changed_flags & FIF_PROBE_REQ))
		return;

	/* Supported only for p2p client interfaces */
	if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
	    !vif->p2p)
		return;

	mutex_lock(&mvm->mutex);
	iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
	mutex_unlock(&mvm->mutex);
}

1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633
#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
struct iwl_bcast_iter_data {
	struct iwl_mvm *mvm;
	struct iwl_bcast_filter_cmd *cmd;
	u8 current_filter;
};

static void
iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
			 const struct iwl_fw_bcast_filter *in_filter,
			 struct iwl_fw_bcast_filter *out_filter)
{
	struct iwl_fw_bcast_filter_attr *attr;
	int i;

	memcpy(out_filter, in_filter, sizeof(*out_filter));

	for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
		attr = &out_filter->attrs[i];

		if (!attr->mask)
			break;

1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649
		switch (attr->reserved1) {
		case cpu_to_le16(BC_FILTER_MAGIC_IP):
			if (vif->bss_conf.arp_addr_cnt != 1) {
				attr->mask = 0;
				continue;
			}

			attr->val = vif->bss_conf.arp_addr_list[0];
			break;
		case cpu_to_le16(BC_FILTER_MAGIC_MAC):
			attr->val = *(__be32 *)&vif->addr[2];
			break;
		default:
			break;
		}
		attr->reserved1 = 0;
1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668
		out_filter->num_attrs++;
	}
}

static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
					  struct ieee80211_vif *vif)
{
	struct iwl_bcast_iter_data *data = _data;
	struct iwl_mvm *mvm = data->mvm;
	struct iwl_bcast_filter_cmd *cmd = data->cmd;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_fw_bcast_mac *bcast_mac;
	int i;

	if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
		return;

	bcast_mac = &cmd->macs[mvmvif->id];

1669 1670 1671 1672 1673 1674
	/*
	 * enable filtering only for associated stations, but not for P2P
	 * Clients
	 */
	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
	    !vif->bss_conf.assoc)
1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708
		return;

	bcast_mac->default_discard = 1;

	/* copy all configured filters */
	for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
		/*
		 * Make sure we don't exceed our filters limit.
		 * if there is still a valid filter to be configured,
		 * be on the safe side and just allow bcast for this mac.
		 */
		if (WARN_ON_ONCE(data->current_filter >=
				 ARRAY_SIZE(cmd->filters))) {
			bcast_mac->default_discard = 0;
			bcast_mac->attached_filters = 0;
			break;
		}

		iwl_mvm_set_bcast_filter(vif,
					 &mvm->bcast_filters[i],
					 &cmd->filters[data->current_filter]);

		/* skip current filter if it contains no attributes */
		if (!cmd->filters[data->current_filter].num_attrs)
			continue;

		/* attach the filter to current mac */
		bcast_mac->attached_filters |=
				cpu_to_le16(BIT(data->current_filter));

		data->current_filter++;
	}
}

1709 1710
bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
				    struct iwl_bcast_filter_cmd *cmd)
1711 1712 1713
{
	struct iwl_bcast_iter_data iter_data = {
		.mvm = mvm,
1714
		.cmd = cmd,
1715 1716
	};

1717 1718 1719
	if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
		return false;

1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733
	memset(cmd, 0, sizeof(*cmd));
	cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
	cmd->max_macs = ARRAY_SIZE(cmd->macs);

#ifdef CONFIG_IWLWIFI_DEBUGFS
	/* use debugfs filters/macs if override is configured */
	if (mvm->dbgfs_bcast_filtering.override) {
		memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
		       sizeof(cmd->filters));
		memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
		       sizeof(cmd->macs));
		return true;
	}
#endif
1734 1735 1736

	/* if no filters are configured, do nothing */
	if (!mvm->bcast_filters)
1737
		return false;
1738 1739 1740 1741 1742 1743

	/* configure and attach these filters for each associated sta vif */
	ieee80211_iterate_active_interfaces(
		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
		iwl_mvm_bcast_filter_iterator, &iter_data);

1744 1745
	return true;
}
1746 1747

static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1748 1749 1750 1751 1752 1753 1754 1755 1756
{
	struct iwl_bcast_filter_cmd cmd;

	if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
		return 0;

	if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
		return 0;

E
Emmanuel Grumbach 已提交
1757
	return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1758 1759 1760
				    sizeof(cmd), &cmd);
}
#else
1761
static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1762 1763 1764 1765 1766
{
	return 0;
}
#endif

1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782
static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
				    struct ieee80211_vif *vif)
{
	struct iwl_mu_group_mgmt_cmd cmd = {};

	memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
	       WLAN_MEMBERSHIP_LEN);
	memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
	       WLAN_USER_POSITION_LEN);

	return iwl_mvm_send_cmd_pdu(mvm,
				    WIDE_ID(DATA_PATH_GROUP,
					    UPDATE_MU_GROUPS_CMD),
				    0, sizeof(cmd), &cmd);
}

J
Johannes Berg 已提交
1783 1784 1785 1786 1787 1788 1789 1790
static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
					     struct ieee80211_vif *vif,
					     struct ieee80211_bss_conf *bss_conf,
					     u32 changes)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

1791 1792 1793 1794 1795 1796 1797 1798
	/*
	 * Re-calculate the tsf id, as the master-slave relations depend on the
	 * beacon interval, which was not known when the station interface was
	 * added.
	 */
	if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
		iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);

1799 1800 1801 1802 1803 1804 1805 1806 1807 1808
	/*
	 * If we're not associated yet, take the (new) BSSID before associating
	 * so the firmware knows. If we're already associated, then use the old
	 * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
	 * branch for disassociation below.
	 */
	if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
		memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);

	ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
J
Johannes Berg 已提交
1809 1810 1811
	if (ret)
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);

1812 1813 1814 1815
	/* after sending it once, adopt mac80211 data */
	memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
	mvmvif->associated = bss_conf->assoc;

J
Johannes Berg 已提交
1816 1817
	if (changes & BSS_CHANGED_ASSOC) {
		if (bss_conf->assoc) {
1818 1819 1820 1821 1822
			/* clear statistics to get clean beacon counter */
			iwl_mvm_request_statistics(mvm, true);
			memset(&mvmvif->beacon_stats, 0,
			       sizeof(mvmvif->beacon_stats));

J
Johannes Berg 已提交
1823
			/* add quota for this interface */
1824
			ret = iwl_mvm_update_quotas(mvm, true, NULL);
J
Johannes Berg 已提交
1825 1826 1827 1828
			if (ret) {
				IWL_ERR(mvm, "failed to update quotas\n");
				return;
			}
1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847

			if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
				     &mvm->status)) {
				/*
				 * If we're restarting then the firmware will
				 * obviously have lost synchronisation with
				 * the AP. It will attempt to synchronise by
				 * itself, but we can make it more reliable by
				 * scheduling a session protection time event.
				 *
				 * The firmware needs to receive a beacon to
				 * catch up with synchronisation, use 110% of
				 * the beacon interval.
				 *
				 * Set a large maximum delay to allow for more
				 * than a single interface.
				 */
				u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
				iwl_mvm_protect_session(mvm, vif, dur, dur,
1848
							5 * dur, false);
1849
			}
1850 1851

			iwl_mvm_sf_update(mvm, vif, false);
1852
			iwl_mvm_power_vif_assoc(mvm, vif);
1853
			if (vif->p2p) {
1854
				iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1855 1856 1857 1858
				iwl_mvm_update_smps(mvm, vif,
						    IWL_MVM_SMPS_REQ_PROT,
						    IEEE80211_SMPS_DYNAMIC);
			}
J
Johannes Berg 已提交
1859
		} else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1860 1861 1862 1863 1864 1865 1866
			/*
			 * If update fails - SF might be running in associated
			 * mode while disassociated - which is forbidden.
			 */
			WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
				  "Failed to update SF upon disassociation\n");

J
Johannes Berg 已提交
1867 1868 1869 1870
			/* remove AP station now that the MAC is unassoc */
			ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
			if (ret)
				IWL_ERR(mvm, "failed to remove AP station\n");
1871 1872 1873

			if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
				mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
J
Johannes Berg 已提交
1874 1875
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
			/* remove quota for this interface */
1876
			ret = iwl_mvm_update_quotas(mvm, false, NULL);
J
Johannes Berg 已提交
1877 1878
			if (ret)
				IWL_ERR(mvm, "failed to update quotas\n");
1879 1880 1881

			if (vif->p2p)
				iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1882 1883 1884 1885 1886 1887 1888

			/* this will take the cleared BSSID from bss_conf */
			ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
			if (ret)
				IWL_ERR(mvm,
					"failed to update MAC %pM (clear after unassoc)\n",
					vif->addr);
J
Johannes Berg 已提交
1889
		}
1890

1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902
		/*
		 * The firmware tracks the MU-MIMO group on its own.
		 * However, on HW restart we should restore this data
		 */
		if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
		    changes & BSS_CHANGED_MU_GROUPS) {
			ret = iwl_mvm_update_mu_groups(mvm, vif);
			if (ret)
				IWL_ERR(mvm,
					"failed to update VHT MU_MIMO groups\n");
		}

1903
		iwl_mvm_recalc_multicast(mvm);
1904
		iwl_mvm_configure_bcast_filter(mvm);
1905

1906 1907 1908
		/* reset rssi values */
		mvmvif->bf_data.ave_beacon_signal = 0;

1909
		iwl_mvm_bt_coex_vif_change(mvm);
1910 1911
		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
				    IEEE80211_SMPS_AUTOMATIC);
1912 1913 1914
		if (fw_has_capa(&mvm->fw->ucode_capa,
				IWL_UCODE_TLV_CAPA_UMAC_SCAN))
			iwl_mvm_config_scan(mvm);
1915
	} else if (changes & BSS_CHANGED_BEACON_INFO) {
1916 1917 1918 1919 1920 1921
		/*
		 * We received a beacon _after_ association so
		 * remove the session protection.
		 */
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
J
Johannes Berg 已提交
1922
	}
1923 1924 1925 1926 1927 1928

	if (changes & BSS_CHANGED_BEACON_INFO) {
		iwl_mvm_sf_update(mvm, vif, false);
		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
	}

1929 1930 1931 1932 1933 1934
	if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
		ret = iwl_mvm_power_update_mac(mvm);
		if (ret)
			IWL_ERR(mvm, "failed to update power mode\n");
	}

1935 1936 1937 1938 1939
	if (changes & BSS_CHANGED_TXPOWER) {
		IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
				bss_conf->txpower);
		iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
	}
1940 1941

	if (changes & BSS_CHANGED_CQM) {
1942
		IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1943 1944
		/* reset cqm events tracking */
		mvmvif->bf_data.last_cqm_event = 0;
1945 1946 1947 1948 1949 1950
		if (mvmvif->bf_data.bf_enabled) {
			ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
			if (ret)
				IWL_ERR(mvm,
					"failed to update CQM thresholds\n");
		}
1951
	}
1952 1953

	if (changes & BSS_CHANGED_ARP_FILTER) {
1954
		IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1955
		iwl_mvm_configure_bcast_filter(mvm);
1956
	}
J
Johannes Berg 已提交
1957 1958
}

J
Johannes Berg 已提交
1959 1960
static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1961 1962 1963 1964 1965
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

1966 1967 1968 1969 1970 1971 1972 1973
	/*
	 * iwl_mvm_mac_ctxt_add() might read directly from the device
	 * (the system time), so make sure it is available.
	 */
	ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
	if (ret)
		return ret;

J
Johannes Berg 已提交
1974 1975 1976 1977 1978 1979 1980
	mutex_lock(&mvm->mutex);

	/* Send the beacon template */
	ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
	if (ret)
		goto out_unlock;

1981 1982 1983 1984 1985 1986 1987
	/*
	 * Re-calculate the tsf id, as the master-slave relations depend on the
	 * beacon interval, which was not known when the AP interface was added.
	 */
	if (vif->type == NL80211_IFTYPE_AP)
		iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);

1988 1989
	mvmvif->ap_assoc_sta_count = 0;

J
Johannes Berg 已提交
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001
	/* Add the mac context */
	ret = iwl_mvm_mac_ctxt_add(mvm, vif);
	if (ret)
		goto out_unlock;

	/* Perform the binding */
	ret = iwl_mvm_binding_add_vif(mvm, vif);
	if (ret)
		goto out_remove;

	/* Send the bcast station. At this stage the TBTT and DTIM time events
	 * are added and applied to the scheduler */
2002
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
2003 2004 2005
	if (ret)
		goto out_unbind;

2006 2007 2008
	/* must be set before quota calculations */
	mvmvif->ap_ibss_active = true;

2009
	/* power updated needs to be done before quotas */
2010
	iwl_mvm_power_update_mac(mvm);
2011

2012
	ret = iwl_mvm_update_quotas(mvm, false, NULL);
J
Johannes Berg 已提交
2013
	if (ret)
2014
		goto out_quota_failed;
J
Johannes Berg 已提交
2015

J
Johannes Berg 已提交
2016
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
2017
	if (vif->p2p && mvm->p2p_device_vif)
2018
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
2019

2020 2021
	iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);

2022
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
2023

2024 2025 2026 2027
	/* we don't support TDLS during DCM */
	if (iwl_mvm_phy_ctx_count(mvm) > 1)
		iwl_mvm_teardown_tdls_peers(mvm);

2028
	goto out_unlock;
J
Johannes Berg 已提交
2029

2030
out_quota_failed:
2031
	iwl_mvm_power_update_mac(mvm);
2032
	mvmvif->ap_ibss_active = false;
2033
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
2034 2035 2036 2037 2038 2039
out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
out_remove:
	iwl_mvm_mac_ctxt_remove(mvm, vif);
out_unlock:
	mutex_unlock(&mvm->mutex);
2040
	iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
J
Johannes Berg 已提交
2041 2042 2043
	return ret;
}

J
Johannes Berg 已提交
2044 2045
static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
Johannes Berg 已提交
2046 2047 2048 2049
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

2050 2051
	iwl_mvm_prepare_mac_removal(mvm, vif);

J
Johannes Berg 已提交
2052 2053
	mutex_lock(&mvm->mutex);

2054
	/* Handle AP stop while in CSA */
2055 2056 2057
	if (rcu_access_pointer(mvm->csa_vif) == vif) {
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
2058
		RCU_INIT_POINTER(mvm->csa_vif, NULL);
2059
		mvmvif->csa_countdown = false;
2060
	}
2061

2062 2063 2064 2065 2066
	if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
		RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
		mvm->csa_tx_block_bcn_timeout = 0;
	}

J
Johannes Berg 已提交
2067
	mvmvif->ap_ibss_active = false;
2068
	mvm->ap_last_beacon_gp2 = 0;
J
Johannes Berg 已提交
2069

2070
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
2071

2072 2073
	iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);

J
Johannes Berg 已提交
2074
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
2075
	if (vif->p2p && mvm->p2p_device_vif)
2076
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
2077

2078
	iwl_mvm_update_quotas(mvm, false, NULL);
2079
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
2080
	iwl_mvm_binding_remove_vif(mvm, vif);
2081

2082
	iwl_mvm_power_update_mac(mvm);
2083

J
Johannes Berg 已提交
2084 2085 2086 2087 2088
	iwl_mvm_mac_ctxt_remove(mvm, vif);

	mutex_unlock(&mvm->mutex);
}

J
Johannes Berg 已提交
2089 2090 2091 2092 2093
static void
iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 struct ieee80211_bss_conf *bss_conf,
				 u32 changes)
J
Johannes Berg 已提交
2094
{
2095
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2096

2097 2098 2099 2100
	/* Changes will be applied when the AP/IBSS is started */
	if (!mvmvif->ap_ibss_active)
		return;

2101
	if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2102
		       BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2103
	    iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2104
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2105

J
Johannes Berg 已提交
2106
	/* Need to send a new beacon template to the FW */
2107 2108 2109
	if (changes & BSS_CHANGED_BEACON &&
	    iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
		IWL_WARN(mvm, "Failed updating beacon data\n");
2110 2111 2112 2113 2114 2115 2116

	if (changes & BSS_CHANGED_TXPOWER) {
		IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
				bss_conf->txpower);
		iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
	}

J
Johannes Berg 已提交
2117 2118 2119 2120 2121 2122 2123 2124 2125
}

static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
				     struct ieee80211_vif *vif,
				     struct ieee80211_bss_conf *bss_conf,
				     u32 changes)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

2126 2127 2128 2129 2130 2131 2132 2133
	/*
	 * iwl_mvm_bss_info_changed_station() might call
	 * iwl_mvm_protect_session(), which reads directly from
	 * the device (the system time), so make sure it is available.
	 */
	if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
		return;

J
Johannes Berg 已提交
2134 2135
	mutex_lock(&mvm->mutex);

2136
	if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2137
		iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2138

J
Johannes Berg 已提交
2139 2140 2141 2142 2143
	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
		iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
		break;
	case NL80211_IFTYPE_AP:
J
Johannes Berg 已提交
2144 2145
	case NL80211_IFTYPE_ADHOC:
		iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
J
Johannes Berg 已提交
2146 2147 2148 2149 2150 2151 2152
		break;
	default:
		/* shouldn't happen */
		WARN_ON_ONCE(1);
	}

	mutex_unlock(&mvm->mutex);
2153
	iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
J
Johannes Berg 已提交
2154 2155 2156 2157
}

static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
2158
			       struct ieee80211_scan_request *hw_req)
J
Johannes Berg 已提交
2159 2160 2161 2162
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

2163 2164
	if (hw_req->req.n_channels == 0 ||
	    hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
J
Johannes Berg 已提交
2165 2166 2167
		return -EINVAL;

	mutex_lock(&mvm->mutex);
2168
	ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
J
Johannes Berg 已提交
2169
	mutex_unlock(&mvm->mutex);
2170

J
Johannes Berg 已提交
2171 2172 2173 2174 2175 2176 2177 2178 2179 2180
	return ret;
}

static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	mutex_lock(&mvm->mutex);

2181 2182 2183 2184 2185 2186 2187
	/* Due to a race condition, it's possible that mac80211 asks
	 * us to stop a hw_scan when it's already stopped.  This can
	 * happen, for instance, if we stopped the scan ourselves,
	 * called ieee80211_scan_completed() and the userspace called
	 * cancel scan scan before ieee80211_scan_work() could run.
	 * To handle that, simply return if the scan is not running.
	*/
2188
	if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2189
		iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
J
Johannes Berg 已提交
2190 2191 2192 2193 2194 2195

	mutex_unlock(&mvm->mutex);
}

static void
iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2196
				  struct ieee80211_sta *sta, u16 tids,
J
Johannes Berg 已提交
2197 2198 2199 2200 2201 2202
				  int num_frames,
				  enum ieee80211_frame_release_type reason,
				  bool more_data)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

2203
	/* Called when we need to transmit (a) frame(s) from mac80211 */
J
Johannes Berg 已提交
2204

2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221
	iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
					  tids, more_data, false);
}

static void
iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
				    struct ieee80211_sta *sta, u16 tids,
				    int num_frames,
				    enum ieee80211_frame_release_type reason,
				    bool more_data)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	/* Called when we need to transmit (a) frame(s) from agg queue */

	iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
					  tids, more_data, true);
J
Johannes Berg 已提交
2222 2223 2224 2225 2226 2227 2228 2229
}

static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
				   struct ieee80211_vif *vif,
				   enum sta_notify_cmd cmd,
				   struct ieee80211_sta *sta)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2230
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2231
	unsigned long txqs = 0, tids = 0;
2232
	int tid;
J
Johannes Berg 已提交
2233

2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249
	spin_lock_bh(&mvmsta->lock);
	for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
		struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];

		if (tid_data->state != IWL_AGG_ON &&
		    tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
			continue;

		__set_bit(tid_data->txq_id, &txqs);

		if (iwl_mvm_tid_queued(tid_data) == 0)
			continue;

		__set_bit(tid, &tids);
	}

J
Johannes Berg 已提交
2250 2251
	switch (cmd) {
	case STA_NOTIFY_SLEEP:
2252
		if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
J
Johannes Berg 已提交
2253
			ieee80211_sta_block_awake(hw, sta, true);
2254

2255
		for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2256
			ieee80211_sta_set_buffered(sta, tid, true);
2257 2258 2259

		if (txqs)
			iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
J
Johannes Berg 已提交
2260 2261 2262 2263 2264 2265 2266
		/*
		 * The fw updates the STA to be asleep. Tx packets on the Tx
		 * queues to this station will not be transmitted. The fw will
		 * send a Tx response with TX_STATUS_FAIL_DEST_PS.
		 */
		break;
	case STA_NOTIFY_AWAKE:
2267
		if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
J
Johannes Berg 已提交
2268
			break;
2269 2270 2271

		if (txqs)
			iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2272
		iwl_mvm_sta_modify_ps_wake(mvm, sta);
J
Johannes Berg 已提交
2273 2274 2275 2276
		break;
	default:
		break;
	}
2277
	spin_unlock_bh(&mvmsta->lock);
J
Johannes Berg 已提交
2278 2279
}

2280 2281 2282 2283 2284
static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif,
				       struct ieee80211_sta *sta)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2285
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298

	/*
	 * This is called before mac80211 does RCU synchronisation,
	 * so here we already invalidate our internal RCU-protected
	 * station pointer. The rest of the code will thus no longer
	 * be able to find the station this way, and we don't rely
	 * on further RCU synchronisation after the sta_state()
	 * callback deleted the station.
	 */
	mutex_lock(&mvm->mutex);
	if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
		rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
				   ERR_PTR(-ENOENT));
2299

2300 2301 2302
	mutex_unlock(&mvm->mutex);
}

2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316
static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
				const u8 *bssid)
{
	if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
		return;

	if (iwlwifi_mod_params.uapsd_disable) {
		vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
		return;
	}

	vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
}

2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344
static void
iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
			   struct ieee80211_vif *vif, u8 *peer_addr,
			   enum nl80211_tdls_operation action)
{
	struct iwl_fw_dbg_trigger_tlv *trig;
	struct iwl_fw_dbg_trigger_tdls *tdls_trig;

	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
		return;

	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
	tdls_trig = (void *)trig->data;
	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
		return;

	if (!(tdls_trig->action_bitmap & BIT(action)))
		return;

	if (tdls_trig->peer_mode &&
	    memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
		return;

	iwl_mvm_fw_dbg_collect_trig(mvm, trig,
				    "TDLS event occurred, peer %pM, action %d",
				    peer_addr, action);
}

J
Johannes Berg 已提交
2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367
static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif,
				 struct ieee80211_sta *sta,
				 enum ieee80211_sta_state old_state,
				 enum ieee80211_sta_state new_state)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

	IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
			   sta->addr, old_state, new_state);

	/* this would be a mac80211 bug ... but don't crash */
	if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
		return -EINVAL;

	/* if a STA is being removed, reuse its ID */
	flush_work(&mvm->sta_drained_wk);

	mutex_lock(&mvm->mutex);
	if (old_state == IEEE80211_STA_NOTEXIST &&
	    new_state == IEEE80211_STA_NONE) {
2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382
		/*
		 * Firmware bug - it'll crash if the beacon interval is less
		 * than 16. We can't avoid connecting at all, so refuse the
		 * station state change, this will cause mac80211 to abandon
		 * attempts to connect to this AP, and eventually wpa_s will
		 * blacklist the AP...
		 */
		if (vif->type == NL80211_IFTYPE_STATION &&
		    vif->bss_conf.beacon_int < 16) {
			IWL_ERR(mvm,
				"AP %pM beacon interval is %d, refusing due to firmware bug!\n",
				sta->addr, vif->bss_conf.beacon_int);
			ret = -EINVAL;
			goto out_unlock;
		}
2383 2384 2385

		if (sta->tdls &&
		    (vif->p2p ||
2386 2387
		     iwl_mvm_tdls_sta_count(mvm, NULL) ==
						IWL_MVM_TDLS_STA_COUNT ||
2388 2389 2390 2391 2392 2393
		     iwl_mvm_phy_ctx_count(mvm) > 1)) {
			IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
			ret = -EBUSY;
			goto out_unlock;
		}

J
Johannes Berg 已提交
2394
		ret = iwl_mvm_add_sta(mvm, vif, sta);
2395
		if (sta->tdls && ret == 0) {
2396
			iwl_mvm_recalc_tdls_state(mvm, vif, true);
2397 2398 2399
			iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
						   NL80211_TDLS_SETUP);
		}
J
Johannes Berg 已提交
2400 2401
	} else if (old_state == IEEE80211_STA_NONE &&
		   new_state == IEEE80211_STA_AUTH) {
2402 2403 2404 2405 2406
		/*
		 * EBS may be disabled due to previous failures reported by FW.
		 * Reset EBS status here assuming environment has been changed.
		 */
		mvm->last_ebs_successful = true;
2407
		iwl_mvm_check_uapsd(mvm, vif, sta->addr);
J
Johannes Berg 已提交
2408 2409 2410
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_ASSOC) {
2411 2412 2413 2414
		if (vif->type == NL80211_IFTYPE_AP) {
			mvmvif->ap_assoc_sta_count++;
			iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
		}
2415 2416 2417
		ret = iwl_mvm_update_sta(mvm, vif, sta);
		if (ret == 0)
			iwl_mvm_rs_rate_init(mvm, sta,
2418 2419
					     mvmvif->phy_ctxt->channel->band,
					     true);
J
Johannes Berg 已提交
2420 2421
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTHORIZED) {
2422 2423 2424 2425 2426

		/* we don't support TDLS during DCM */
		if (iwl_mvm_phy_ctx_count(mvm) > 1)
			iwl_mvm_teardown_tdls_peers(mvm);

2427 2428 2429 2430
		if (sta->tdls)
			iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
						   NL80211_TDLS_ENABLE_LINK);

2431
		/* enable beacon filtering */
2432
		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2433 2434 2435
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTHORIZED &&
		   new_state == IEEE80211_STA_ASSOC) {
2436
		/* disable beacon filtering */
E
Emmanuel Grumbach 已提交
2437
		WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2438 2439 2440
		ret = 0;
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTH) {
2441 2442 2443 2444
		if (vif->type == NL80211_IFTYPE_AP) {
			mvmvif->ap_assoc_sta_count--;
			iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
		}
J
Johannes Berg 已提交
2445 2446 2447 2448 2449 2450 2451
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_NONE) {
		ret = 0;
	} else if (old_state == IEEE80211_STA_NONE &&
		   new_state == IEEE80211_STA_NOTEXIST) {
		ret = iwl_mvm_rm_sta(mvm, vif, sta);
2452
		if (sta->tdls) {
2453
			iwl_mvm_recalc_tdls_state(mvm, vif, false);
2454 2455 2456
			iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
						   NL80211_TDLS_DISABLE_LINK);
		}
J
Johannes Berg 已提交
2457 2458 2459
	} else {
		ret = -EIO;
	}
2460
 out_unlock:
J
Johannes Berg 已提交
2461 2462
	mutex_unlock(&mvm->mutex);

2463 2464 2465 2466 2467 2468 2469 2470 2471
	if (sta->tdls && ret == 0) {
		if (old_state == IEEE80211_STA_NOTEXIST &&
		    new_state == IEEE80211_STA_NONE)
			ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
		else if (old_state == IEEE80211_STA_NONE &&
			 new_state == IEEE80211_STA_NOTEXIST)
			ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
	}

J
Johannes Berg 已提交
2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483
	return ret;
}

static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	mvm->rts_threshold = value;

	return 0;
}

2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494
static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
				  struct ieee80211_vif *vif,
				  struct ieee80211_sta *sta, u32 changed)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	if (vif->type == NL80211_IFTYPE_STATION &&
	    changed & IEEE80211_RC_NSS_CHANGED)
		iwl_mvm_sf_update(mvm, vif, false);
}

J
Johannes Berg 已提交
2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511
static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif, u16 ac,
			       const struct ieee80211_tx_queue_params *params)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	mvmvif->queue_params[ac] = *params;

	/*
	 * No need to update right away, we'll get BSS_CHANGED_QOS
	 * The exception is P2P_DEVICE interface which needs immediate update.
	 */
	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		int ret;

		mutex_lock(&mvm->mutex);
2512
		ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
J
Johannes Berg 已提交
2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530
		mutex_unlock(&mvm->mutex);
		return ret;
	}
	return 0;
}

static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
			   200 + vif->bss_conf.beacon_int);
	u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
			       100 + vif->bss_conf.beacon_int);

	if (WARN_ON_ONCE(vif->bss_conf.assoc))
		return;

2531 2532 2533 2534 2535 2536 2537
	/*
	 * iwl_mvm_protect_session() reads directly from the device
	 * (the system time), so make sure it is available.
	 */
	if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
		return;

J
Johannes Berg 已提交
2538 2539
	mutex_lock(&mvm->mutex);
	/* Try really hard to protect the session and hear a beacon */
2540
	iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
J
Johannes Berg 已提交
2541
	mutex_unlock(&mvm->mutex);
2542 2543

	iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
J
Johannes Berg 已提交
2544 2545
}

2546 2547 2548
static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
					struct ieee80211_vif *vif,
					struct cfg80211_sched_scan_request *req,
D
David Spinadel 已提交
2549
					struct ieee80211_scan_ies *ies)
2550 2551 2552 2553
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	int ret;
2554

2555 2556
	mutex_lock(&mvm->mutex);

2557
	if (!vif->bss_conf.idle) {
2558 2559 2560 2561
		ret = -EBUSY;
		goto out;
	}

2562
	ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2563

2564 2565 2566 2567 2568
out:
	mutex_unlock(&mvm->mutex);
	return ret;
}

2569 2570
static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
2571 2572
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2573
	int ret;
2574 2575

	mutex_lock(&mvm->mutex);
2576 2577 2578 2579 2580 2581 2582 2583 2584

	/* Due to a race condition, it's possible that mac80211 asks
	 * us to stop a sched_scan when it's already stopped.  This
	 * can happen, for instance, if we stopped the scan ourselves,
	 * called ieee80211_sched_scan_stopped() and the userspace called
	 * stop sched scan scan before ieee80211_sched_scan_stopped_work()
	 * could run.  To handle this, simply return if the scan is
	 * not running.
	*/
2585
	if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2586 2587 2588 2589
		mutex_unlock(&mvm->mutex);
		return 0;
	}

2590
	ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2591
	mutex_unlock(&mvm->mutex);
2592
	iwl_mvm_wait_for_async_handlers(mvm);
2593

2594
	return ret;
2595 2596
}

J
Johannes Berg 已提交
2597 2598 2599 2600 2601 2602 2603
static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
			       enum set_key_cmd cmd,
			       struct ieee80211_vif *vif,
			       struct ieee80211_sta *sta,
			       struct ieee80211_key_conf *key)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2604 2605 2606
	struct iwl_mvm_sta *mvmsta;
	struct iwl_mvm_key_pn *ptk_pn;
	int keyidx = key->keyidx;
J
Johannes Berg 已提交
2607
	int ret;
2608
	u8 key_offset;
J
Johannes Berg 已提交
2609 2610 2611 2612 2613 2614 2615 2616 2617

	if (iwlwifi_mod_params.sw_crypto) {
		IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
		return -EOPNOTSUPP;
	}

	switch (key->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2618
		key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
J
Johannes Berg 已提交
2619
		break;
2620 2621 2622
	case WLAN_CIPHER_SUITE_CCMP:
		key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
		break;
J
Johannes Berg 已提交
2623
	case WLAN_CIPHER_SUITE_AES_CMAC:
2624
		WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
J
Johannes Berg 已提交
2625 2626 2627
		break;
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
2628 2629 2630 2631 2632 2633
		/* For non-client mode, only use WEP keys for TX as we probably
		 * don't have a station yet anyway and would then have to keep
		 * track of the keys, linking them to each of the clients/peers
		 * as they appear. For now, don't do that, for performance WEP
		 * offload doesn't really matter much, but we need it for some
		 * other offload features in client mode.
J
Johannes Berg 已提交
2634
		 */
2635 2636 2637
		if (vif->type != NL80211_IFTYPE_STATION)
			return 0;
		break;
J
Johannes Berg 已提交
2638
	default:
2639 2640 2641 2642 2643 2644
		/* currently FW supports only one optional cipher scheme */
		if (hw->n_cipher_schemes &&
		    hw->cipher_schemes->cipher == key->cipher)
			key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
		else
			return -EOPNOTSUPP;
J
Johannes Berg 已提交
2645 2646 2647 2648 2649 2650
	}

	mutex_lock(&mvm->mutex);

	switch (cmd) {
	case SET_KEY:
J
Johannes Berg 已提交
2651 2652 2653 2654 2655 2656 2657
		if ((vif->type == NL80211_IFTYPE_ADHOC ||
		     vif->type == NL80211_IFTYPE_AP) && !sta) {
			/*
			 * GTK on AP interface is a TX-only key, return 0;
			 * on IBSS they're per-station and because we're lazy
			 * we don't support them for RX, so do the same.
			 */
2658 2659 2660 2661 2662
			ret = 0;
			key->hw_key_idx = STA_KEY_IDX_INVALID;
			break;
		}

2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673
		/* During FW restart, in order to restore the state as it was,
		 * don't try to reprogram keys we previously failed for.
		 */
		if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
		    key->hw_key_idx == STA_KEY_IDX_INVALID) {
			IWL_DEBUG_MAC80211(mvm,
					   "skip invalid idx key programming during restart\n");
			ret = 0;
			break;
		}

2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703
		if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
		    sta && iwl_mvm_has_new_rx_api(mvm) &&
		    key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
		    (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
		     key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
			struct ieee80211_key_seq seq;
			int tid, q;

			mvmsta = iwl_mvm_sta_from_mac80211(sta);
			WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
			ptk_pn = kzalloc(sizeof(*ptk_pn) +
					 mvm->trans->num_rx_queues *
						sizeof(ptk_pn->q[0]),
					 GFP_KERNEL);
			if (!ptk_pn) {
				ret = -ENOMEM;
				break;
			}

			for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
				ieee80211_get_key_rx_seq(key, tid, &seq);
				for (q = 0; q < mvm->trans->num_rx_queues; q++)
					memcpy(ptk_pn->q[q].pn[tid],
					       seq.ccmp.pn,
					       IEEE80211_CCMP_PN_LEN);
			}

			rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
		}

2704 2705 2706 2707 2708 2709
		/* in HW restart reuse the index, otherwise request a new one */
		if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
			key_offset = key->hw_key_idx;
		else
			key_offset = STA_KEY_IDX_INVALID;

J
Johannes Berg 已提交
2710
		IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2711
		ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
J
Johannes Berg 已提交
2712 2713 2714 2715 2716 2717
		if (ret) {
			IWL_WARN(mvm, "set key failed\n");
			/*
			 * can't add key for RX, but we don't need it
			 * in the device for TX so still return 0
			 */
2718
			key->hw_key_idx = STA_KEY_IDX_INVALID;
J
Johannes Berg 已提交
2719 2720 2721 2722 2723
			ret = 0;
		}

		break;
	case DISABLE_KEY:
2724 2725 2726 2727 2728
		if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
			ret = 0;
			break;
		}

2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741
		if (sta && iwl_mvm_has_new_rx_api(mvm) &&
		    key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
		    (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
		     key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
			mvmsta = iwl_mvm_sta_from_mac80211(sta);
			ptk_pn = rcu_dereference_protected(
						mvmsta->ptk_pn[keyidx],
						lockdep_is_held(&mvm->mutex));
			RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
			if (ptk_pn)
				kfree_rcu(ptk_pn, rcu_head);
		}

J
Johannes Berg 已提交
2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760
		IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
		ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
		break;
	default:
		ret = -EINVAL;
	}

	mutex_unlock(&mvm->mutex);
	return ret;
}

static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
					struct ieee80211_vif *vif,
					struct ieee80211_key_conf *keyconf,
					struct ieee80211_sta *sta,
					u32 iv32, u16 *phase1key)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

J
Johannes Berg 已提交
2761 2762 2763
	if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
		return;

J
Johannes Berg 已提交
2764 2765 2766 2767
	iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
}


2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801
static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
			       struct iwl_rx_packet *pkt, void *data)
{
	struct iwl_mvm *mvm =
		container_of(notif_wait, struct iwl_mvm, notif_wait);
	struct iwl_hs20_roc_res *resp;
	int resp_len = iwl_rx_packet_payload_len(pkt);
	struct iwl_mvm_time_event_data *te_data = data;

	if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
		return true;

	if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
		IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
		return true;
	}

	resp = (void *)pkt->data;

	IWL_DEBUG_TE(mvm,
		     "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
		     resp->status, resp->event_unique_id);

	te_data->uid = le32_to_cpu(resp->event_unique_id);
	IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
		     te_data->uid);

	spin_lock_bh(&mvm->time_event_lock);
	list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
	spin_unlock_bh(&mvm->time_event_lock);

	return true;
}

2802 2803 2804 2805 2806
#define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
#define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
#define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
#define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
#define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2807 2808 2809 2810 2811 2812 2813 2814
static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
				    struct ieee80211_channel *channel,
				    struct ieee80211_vif *vif,
				    int duration)
{
	int res, time_reg = DEVICE_SYSTEM_TIME_REG;
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2815
	static const u16 time_event_response[] = { HOT_SPOT_CMD };
2816
	struct iwl_notification_wait wait_time_event;
2817 2818 2819
	u32 dtim_interval = vif->bss_conf.dtim_period *
		vif->bss_conf.beacon_int;
	u32 req_dur, delay;
2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833
	struct iwl_hs20_roc_req aux_roc_req = {
		.action = cpu_to_le32(FW_CTXT_ACTION_ADD),
		.id_and_color =
			cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
		.sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
		/* Set the channel info data */
		.channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
			PHY_BAND_24 : PHY_BAND_5,
		.channel_info.channel = channel->hw_value,
		.channel_info.width = PHY_VHT_CHANNEL_MODE20,
		/* Set the time and duration */
		.apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
	 };

2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863
	delay = AUX_ROC_MIN_DELAY;
	req_dur = MSEC_TO_TU(duration);

	/*
	 * If we are associated we want the delay time to be at least one
	 * dtim interval so that the FW can wait until after the DTIM and
	 * then start the time event, this will potentially allow us to
	 * remain off-channel for the max duration.
	 * Since we want to use almost a whole dtim interval we would also
	 * like the delay to be for 2-3 dtim intervals, in case there are
	 * other time events with higher priority.
	 */
	if (vif->bss_conf.assoc) {
		delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
		/* We cannot remain off-channel longer than the DTIM interval */
		if (dtim_interval <= req_dur) {
			req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
			if (req_dur <= AUX_ROC_MIN_DURATION)
				req_dur = dtim_interval -
					AUX_ROC_MIN_SAFETY_BUFFER;
		}
	}

	aux_roc_req.duration = cpu_to_le32(req_dur);
	aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);

	IWL_DEBUG_TE(mvm,
		     "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
		     channel->hw_value, req_dur, duration, delay,
		     dtim_interval);
2864 2865 2866
	/* Set the node address */
	memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);

2867 2868 2869 2870 2871 2872 2873 2874 2875
	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->time_event_lock);

	if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
		spin_unlock_bh(&mvm->time_event_lock);
		return -EIO;
	}

2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919
	te_data->vif = vif;
	te_data->duration = duration;
	te_data->id = HOT_SPOT_CMD;

	spin_unlock_bh(&mvm->time_event_lock);

	/*
	 * Use a notification wait, which really just processes the
	 * command response and doesn't wait for anything, in order
	 * to be able to process the response and get the UID inside
	 * the RX path. Using CMD_WANT_SKB doesn't work because it
	 * stores the buffer and then wakes up this thread, by which
	 * time another notification (that the time event started)
	 * might already be processed unsuccessfully.
	 */
	iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
				   time_event_response,
				   ARRAY_SIZE(time_event_response),
				   iwl_mvm_rx_aux_roc, te_data);

	res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
				   &aux_roc_req);

	if (res) {
		IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
		iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
		goto out_clear_te;
	}

	/* No need to wait for anything, so just pass 1 (0 isn't valid) */
	res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
	/* should never fail */
	WARN_ON_ONCE(res);

	if (res) {
 out_clear_te:
		spin_lock_bh(&mvm->time_event_lock);
		iwl_mvm_te_clear_data(mvm, te_data);
		spin_unlock_bh(&mvm->time_event_lock);
	}

	return res;
}

J
Johannes Berg 已提交
2920 2921 2922
static int iwl_mvm_roc(struct ieee80211_hw *hw,
		       struct ieee80211_vif *vif,
		       struct ieee80211_channel *channel,
2923 2924
		       int duration,
		       enum ieee80211_roc_type type)
J
Johannes Berg 已提交
2925 2926
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2927
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2928
	struct cfg80211_chan_def chandef;
2929 2930 2931 2932 2933
	struct iwl_mvm_phy_ctxt *phy_ctxt;
	int ret, i;

	IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
			   duration, type);
J
Johannes Berg 已提交
2934

2935 2936
	flush_work(&mvm->roc_done_wk);

2937 2938
	mutex_lock(&mvm->mutex);

2939 2940
	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
2941 2942
		if (fw_has_capa(&mvm->fw->ucode_capa,
				IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
2943 2944 2945 2946 2947 2948 2949
			/* Use aux roc framework (HS20) */
			ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
						       vif, duration);
			goto out_unlock;
		}
		IWL_ERR(mvm, "hotspot not supported\n");
		ret = -EINVAL;
2950
		goto out_unlock;
2951 2952 2953 2954 2955
	case NL80211_IFTYPE_P2P_DEVICE:
		/* handle below */
		break;
	default:
		IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2956 2957
		ret = -EINVAL;
		goto out_unlock;
J
Johannes Berg 已提交
2958 2959
	}

2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991
	for (i = 0; i < NUM_PHY_CTX; i++) {
		phy_ctxt = &mvm->phy_ctxts[i];
		if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
			continue;

		if (phy_ctxt->ref && channel == phy_ctxt->channel) {
			/*
			 * Unbind the P2P_DEVICE from the current PHY context,
			 * and if the PHY context is not used remove it.
			 */
			ret = iwl_mvm_binding_remove_vif(mvm, vif);
			if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
				goto out_unlock;

			iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);

			/* Bind the P2P_DEVICE to the current PHY Context */
			mvmvif->phy_ctxt = phy_ctxt;

			ret = iwl_mvm_binding_add_vif(mvm, vif);
			if (WARN(ret, "Failed binding P2P_DEVICE\n"))
				goto out_unlock;

			iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
			goto schedule_time_event;
		}
	}

	/* Need to update the PHY context only if the ROC channel changed */
	if (channel == mvmvif->phy_ctxt->channel)
		goto schedule_time_event;

J
Johannes Berg 已提交
2992 2993
	cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);

2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039
	/*
	 * Change the PHY context configuration as it is currently referenced
	 * only by the P2P Device MAC
	 */
	if (mvmvif->phy_ctxt->ref == 1) {
		ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
					       &chandef, 1, 1);
		if (ret)
			goto out_unlock;
	} else {
		/*
		 * The PHY context is shared with other MACs. Need to remove the
		 * P2P Device from the binding, allocate an new PHY context and
		 * create a new binding
		 */
		phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
		if (!phy_ctxt) {
			ret = -ENOSPC;
			goto out_unlock;
		}

		ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
					       1, 1);
		if (ret) {
			IWL_ERR(mvm, "Failed to change PHY context\n");
			goto out_unlock;
		}

		/* Unbind the P2P_DEVICE from the current PHY context */
		ret = iwl_mvm_binding_remove_vif(mvm, vif);
		if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
			goto out_unlock;

		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);

		/* Bind the P2P_DEVICE to the new allocated PHY context */
		mvmvif->phy_ctxt = phy_ctxt;

		ret = iwl_mvm_binding_add_vif(mvm, vif);
		if (WARN(ret, "Failed binding P2P_DEVICE\n"))
			goto out_unlock;

		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
	}

schedule_time_event:
J
Johannes Berg 已提交
3040
	/* Schedule the time events */
3041
	ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
J
Johannes Berg 已提交
3042

3043
out_unlock:
J
Johannes Berg 已提交
3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055
	mutex_unlock(&mvm->mutex);
	IWL_DEBUG_MAC80211(mvm, "leave\n");
	return ret;
}

static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	IWL_DEBUG_MAC80211(mvm, "enter\n");

	mutex_lock(&mvm->mutex);
3056
	iwl_mvm_stop_roc(mvm);
J
Johannes Berg 已提交
3057 3058 3059 3060 3061 3062
	mutex_unlock(&mvm->mutex);

	IWL_DEBUG_MAC80211(mvm, "leave\n");
	return 0;
}

3063 3064
static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
				 struct ieee80211_chanctx_conf *ctx)
J
Johannes Berg 已提交
3065
{
3066 3067
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt;
J
Johannes Berg 已提交
3068 3069
	int ret;

3070 3071
	lockdep_assert_held(&mvm->mutex);

3072
	IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3073 3074 3075 3076 3077 3078

	phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
	if (!phy_ctxt) {
		ret = -ENOSPC;
		goto out;
	}
J
Johannes Berg 已提交
3079

3080
	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3081 3082
				       ctx->rx_chains_static,
				       ctx->rx_chains_dynamic);
3083 3084 3085 3086 3087
	if (ret) {
		IWL_ERR(mvm, "Failed to add PHY context\n");
		goto out;
	}

3088
	iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3089 3090
	*phy_ctxt_id = phy_ctxt->id;
out:
3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101
	return ret;
}

static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
			       struct ieee80211_chanctx_conf *ctx)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

	mutex_lock(&mvm->mutex);
	ret = __iwl_mvm_add_chanctx(mvm, ctx);
J
Johannes Berg 已提交
3102
	mutex_unlock(&mvm->mutex);
3103

J
Johannes Berg 已提交
3104 3105 3106
	return ret;
}

3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117
static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
				     struct ieee80211_chanctx_conf *ctx)
{
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];

	lockdep_assert_held(&mvm->mutex);

	iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
}

J
Johannes Berg 已提交
3118 3119 3120 3121 3122 3123
static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
				   struct ieee80211_chanctx_conf *ctx)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	mutex_lock(&mvm->mutex);
3124
	__iwl_mvm_remove_chanctx(mvm, ctx);
J
Johannes Berg 已提交
3125 3126 3127 3128 3129 3130 3131 3132
	mutex_unlock(&mvm->mutex);
}

static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
				   struct ieee80211_chanctx_conf *ctx,
				   u32 changed)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3133 3134
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
J
Johannes Berg 已提交
3135

3136 3137 3138
	if (WARN_ONCE((phy_ctxt->ref > 1) &&
		      (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
				   IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3139 3140
				   IEEE80211_CHANCTX_CHANGE_RADAR |
				   IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3141 3142 3143 3144
		      "Cannot change PHY. Ref=%d, changed=0x%X\n",
		      phy_ctxt->ref, changed))
		return;

J
Johannes Berg 已提交
3145
	mutex_lock(&mvm->mutex);
3146
	iwl_mvm_bt_coex_vif_change(mvm);
3147
	iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
J
Johannes Berg 已提交
3148 3149 3150 3151 3152
				 ctx->rx_chains_static,
				 ctx->rx_chains_dynamic);
	mutex_unlock(&mvm->mutex);
}

3153 3154
static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif,
3155 3156
					struct ieee80211_chanctx_conf *ctx,
					bool switching_chanctx)
J
Johannes Berg 已提交
3157
{
3158 3159
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
J
Johannes Berg 已提交
3160 3161 3162
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

3163
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
3164

3165
	mvmvif->phy_ctxt = phy_ctxt;
J
Johannes Berg 已提交
3166 3167 3168

	switch (vif->type) {
	case NL80211_IFTYPE_AP:
3169 3170
		/* only needed if we're switching chanctx (i.e. during CSA) */
		if (switching_chanctx) {
3171 3172 3173
			mvmvif->ap_ibss_active = true;
			break;
		}
J
Johannes Berg 已提交
3174
	case NL80211_IFTYPE_ADHOC:
J
Johannes Berg 已提交
3175 3176
		/*
		 * The AP binding flow is handled as part of the start_ap flow
J
Johannes Berg 已提交
3177
		 * (in bss_info_changed), similarly for IBSS.
J
Johannes Berg 已提交
3178 3179
		 */
		ret = 0;
3180
		goto out;
J
Johannes Berg 已提交
3181
	case NL80211_IFTYPE_STATION:
3182
		break;
J
Johannes Berg 已提交
3183
	case NL80211_IFTYPE_MONITOR:
3184 3185
		/* always disable PS when a monitor interface is active */
		mvmvif->ps_disabled = true;
J
Johannes Berg 已提交
3186 3187 3188
		break;
	default:
		ret = -EINVAL;
3189
		goto out;
J
Johannes Berg 已提交
3190 3191 3192 3193
	}

	ret = iwl_mvm_binding_add_vif(mvm, vif);
	if (ret)
3194
		goto out;
J
Johannes Berg 已提交
3195 3196

	/*
3197 3198 3199
	 * Power state must be updated before quotas,
	 * otherwise fw will complain.
	 */
3200
	iwl_mvm_power_update_mac(mvm);
3201 3202

	/* Setting the quota at this stage is only required for monitor
J
Johannes Berg 已提交
3203 3204 3205 3206
	 * interfaces. For the other types, the bss_info changed flow
	 * will handle quota settings.
	 */
	if (vif->type == NL80211_IFTYPE_MONITOR) {
3207
		mvmvif->monitor_active = true;
3208
		ret = iwl_mvm_update_quotas(mvm, false, NULL);
J
Johannes Berg 已提交
3209 3210
		if (ret)
			goto out_remove_binding;
3211 3212 3213 3214 3215

		ret = iwl_mvm_add_snif_sta(mvm, vif);
		if (ret)
			goto out_remove_binding;

J
Johannes Berg 已提交
3216 3217
	}

3218
	/* Handle binding during CSA */
3219
	if (vif->type == NL80211_IFTYPE_AP) {
3220
		iwl_mvm_update_quotas(mvm, false, NULL);
3221
		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3222 3223
	}

3224
	if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243
		u32 duration = 2 * vif->bss_conf.beacon_int;

		/* iwl_mvm_protect_session() reads directly from the
		 * device (the system time), so make sure it is
		 * available.
		 */
		ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
		if (ret)
			goto out_remove_binding;

		/* Protect the session to make sure we hear the first
		 * beacon on the new channel.
		 */
		iwl_mvm_protect_session(mvm, vif, duration, duration,
					vif->bss_conf.beacon_int / 2,
					true);

		iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);

3244
		iwl_mvm_update_quotas(mvm, false, NULL);
3245 3246
	}

3247
	goto out;
J
Johannes Berg 已提交
3248

3249
out_remove_binding:
J
Johannes Berg 已提交
3250
	iwl_mvm_binding_remove_vif(mvm, vif);
3251
	iwl_mvm_power_update_mac(mvm);
3252
out:
J
Johannes Berg 已提交
3253 3254 3255 3256
	if (ret)
		mvmvif->phy_ctxt = NULL;
	return ret;
}
3257 3258 3259
static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif,
				      struct ieee80211_chanctx_conf *ctx)
J
Johannes Berg 已提交
3260 3261
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3262
	int ret;
J
Johannes Berg 已提交
3263 3264

	mutex_lock(&mvm->mutex);
3265
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3266 3267 3268 3269 3270 3271 3272
	mutex_unlock(&mvm->mutex);

	return ret;
}

static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
					   struct ieee80211_vif *vif,
3273 3274
					   struct ieee80211_chanctx_conf *ctx,
					   bool switching_chanctx)
3275 3276
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3277
	struct ieee80211_vif *disabled_vif = NULL;
3278 3279

	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
3280 3281 3282 3283

	iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);

	switch (vif->type) {
J
Johannes Berg 已提交
3284
	case NL80211_IFTYPE_ADHOC:
3285
		goto out;
J
Johannes Berg 已提交
3286
	case NL80211_IFTYPE_MONITOR:
3287
		mvmvif->monitor_active = false;
3288
		mvmvif->ps_disabled = false;
3289
		iwl_mvm_rm_snif_sta(mvm, vif);
J
Johannes Berg 已提交
3290
		break;
3291 3292
	case NL80211_IFTYPE_AP:
		/* This part is triggered only during CSA */
3293
		if (!switching_chanctx || !mvmvif->ap_ibss_active)
3294
			goto out;
3295

3296 3297
		mvmvif->csa_countdown = false;

3298 3299 3300 3301 3302 3303
		/* Set CS bit on all the stations */
		iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);

		/* Save blocked iface, the timeout is set on the next beacon */
		rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);

3304
		mvmvif->ap_ibss_active = false;
3305 3306 3307 3308 3309 3310 3311
		break;
	case NL80211_IFTYPE_STATION:
		if (!switching_chanctx)
			break;

		disabled_vif = vif;

3312
		iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3313
		break;
J
Johannes Berg 已提交
3314 3315 3316 3317
	default:
		break;
	}

3318
	iwl_mvm_update_quotas(mvm, false, disabled_vif);
3319
	iwl_mvm_binding_remove_vif(mvm, vif);
3320

3321
out:
3322
	mvmvif->phy_ctxt = NULL;
3323
	iwl_mvm_power_update_mac(mvm);
3324 3325 3326 3327 3328 3329 3330 3331 3332
}

static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
					 struct ieee80211_vif *vif,
					 struct ieee80211_chanctx_conf *ctx)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	mutex_lock(&mvm->mutex);
3333
	__iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
J
Johannes Berg 已提交
3334 3335 3336
	mutex_unlock(&mvm->mutex);
}

3337 3338 3339
static int
iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
				struct ieee80211_vif_chanctx_switch *vifs)
3340 3341 3342 3343
{
	int ret;

	mutex_lock(&mvm->mutex);
3344
	__iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3345 3346 3347 3348 3349 3350 3351 3352
	__iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);

	ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
	if (ret) {
		IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
		goto out_reassign;
	}

3353 3354
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
					   true);
3355 3356 3357 3358 3359 3360
	if (ret) {
		IWL_ERR(mvm,
			"failed to assign new_ctx during channel switch\n");
		goto out_remove;
	}

3361 3362 3363 3364
	/* we don't support TDLS during DCM - can be caused by channel switch */
	if (iwl_mvm_phy_ctx_count(mvm) > 1)
		iwl_mvm_teardown_tdls_peers(mvm);

3365 3366 3367 3368 3369 3370
	goto out;

out_remove:
	__iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);

out_reassign:
3371
	if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3372 3373 3374 3375
		IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
		goto out_restart;
	}

3376 3377
	if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
					 true)) {
3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389
		IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
		goto out_restart;
	}

	goto out;

out_restart:
	/* things keep failing, better restart the hw */
	iwl_mvm_nic_restart(mvm, false);

out:
	mutex_unlock(&mvm->mutex);
3390 3391 3392 3393

	return ret;
}

3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 3428 3429 3430 3431
static int
iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
				    struct ieee80211_vif_chanctx_switch *vifs)
{
	int ret;

	mutex_lock(&mvm->mutex);
	__iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);

	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
					   true);
	if (ret) {
		IWL_ERR(mvm,
			"failed to assign new_ctx during channel switch\n");
		goto out_reassign;
	}

	goto out;

out_reassign:
	if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
					 true)) {
		IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
		goto out_restart;
	}

	goto out;

out_restart:
	/* things keep failing, better restart the hw */
	iwl_mvm_nic_restart(mvm, false);

out:
	mutex_unlock(&mvm->mutex);

	return ret;
}

3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447 3448
static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
				      struct ieee80211_vif_chanctx_switch *vifs,
				      int n_vifs,
				      enum ieee80211_chanctx_switch_mode mode)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

	/* we only support a single-vif right now */
	if (n_vifs > 1)
		return -EOPNOTSUPP;

	switch (mode) {
	case CHANCTX_SWMODE_SWAP_CONTEXTS:
		ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
		break;
	case CHANCTX_SWMODE_REASSIGN_VIF:
3449
		ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3450 3451 3452 3453 3454 3455
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

3456 3457 3458
	return ret;
}

J
Johannes Berg 已提交
3459 3460 3461 3462 3463
static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
			   struct ieee80211_sta *sta,
			   bool set)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3464
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
3465 3466 3467 3468 3469 3470 3471 3472 3473

	if (!mvm_sta || !mvm_sta->vif) {
		IWL_ERR(mvm, "Station is not associated to a vif\n");
		return -EINVAL;
	}

	return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
}

3474 3475 3476 3477
#ifdef CONFIG_NL80211_TESTMODE
static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
	[IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
	[IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3478
	[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509
};

static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
				      struct ieee80211_vif *vif,
				      void *data, int len)
{
	struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
	int err;
	u32 noa_duration;

	err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
	if (err)
		return err;

	if (!tb[IWL_MVM_TM_ATTR_CMD])
		return -EINVAL;

	switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
	case IWL_MVM_TM_CMD_SET_NOA:
		if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
		    !vif->bss_conf.enable_beacon ||
		    !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
			return -EINVAL;

		noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
		if (noa_duration >= vif->bss_conf.beacon_int)
			return -EINVAL;

		mvm->noa_duration = noa_duration;
		mvm->noa_vif = vif;

3510
		return iwl_mvm_update_quotas(mvm, false, NULL);
3511 3512 3513 3514 3515 3516 3517 3518
	case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
		/* must be associated client vif - ignore authorized */
		if (!vif || vif->type != NL80211_IFTYPE_STATION ||
		    !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
		    !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
			return -EINVAL;

		if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
E
Emmanuel Grumbach 已提交
3519 3520
			return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
		return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540
	}

	return -EOPNOTSUPP;
}

static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif,
				    void *data, int len)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int err;

	mutex_lock(&mvm->mutex);
	err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
	mutex_unlock(&mvm->mutex);

	return err;
}
#endif

3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554
static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
				   struct ieee80211_vif *vif,
				   struct ieee80211_channel_switch *chsw)
{
	/* By implementing this operation, we prevent mac80211 from
	 * starting its own channel switch timer, so that we can call
	 * ieee80211_chswitch_done() ourselves at the right time
	 * (which is when the absence time event starts).
	 */

	IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
			   "dummy channel switch op\n");
}

3555 3556 3557
static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif,
				      struct ieee80211_channel_switch *chsw)
3558 3559
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3560
	struct ieee80211_vif *csa_vif;
3561
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3562
	u32 apply_time;
3563
	int ret;
3564 3565

	mutex_lock(&mvm->mutex);
3566

3567 3568
	mvmvif->csa_failed = false;

3569
	IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3570
			   chsw->chandef.center_freq1);
3571

3572
	iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3573

3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585
	switch (vif->type) {
	case NL80211_IFTYPE_AP:
		csa_vif =
			rcu_dereference_protected(mvm->csa_vif,
						  lockdep_is_held(&mvm->mutex));
		if (WARN_ONCE(csa_vif && csa_vif->csa_active,
			      "Another CSA is already in progress")) {
			ret = -EBUSY;
			goto out_unlock;
		}

		rcu_assign_pointer(mvm->csa_vif, vif);
3586 3587 3588 3589 3590 3591 3592

		if (WARN_ONCE(mvmvif->csa_countdown,
			      "Previous CSA countdown didn't complete")) {
			ret = -EBUSY;
			goto out_unlock;
		}

3593
		break;
3594
	case NL80211_IFTYPE_STATION:
3595 3596 3597 3598 3599 3600 3601
		/* Schedule the time event to a bit before beacon 1,
		 * to make sure we're in the new channel when the
		 * GO/AP arrives.
		 */
		apply_time = chsw->device_timestamp +
			((vif->bss_conf.beacon_int * (chsw->count - 1) -
			  IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3602 3603 3604 3605

		if (chsw->block_tx)
			iwl_mvm_csa_client_absent(mvm, vif);

3606
		iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3607
					    apply_time);
3608 3609 3610 3611 3612 3613
		if (mvmvif->bf_data.bf_enabled) {
			ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
			if (ret)
				goto out_unlock;
		}

3614
		break;
3615 3616 3617
	default:
		break;
	}
3618

3619 3620 3621 3622 3623
	mvmvif->ps_disabled = true;

	ret = iwl_mvm_power_update_ps(mvm);
	if (ret)
		goto out_unlock;
3624

3625 3626 3627
	/* we won't be on this channel any longer */
	iwl_mvm_teardown_tdls_peers(mvm);

3628 3629
out_unlock:
	mutex_unlock(&mvm->mutex);
3630 3631

	return ret;
3632 3633
}

3634 3635 3636 3637 3638 3639 3640 3641 3642
static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

	mutex_lock(&mvm->mutex);

3643 3644 3645 3646 3647 3648
	if (mvmvif->csa_failed) {
		mvmvif->csa_failed = false;
		ret = -EIO;
		goto out_unlock;
	}

3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662
	if (vif->type == NL80211_IFTYPE_STATION) {
		struct iwl_mvm_sta *mvmsta;

		mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
							  mvmvif->ap_sta_id);

		if (WARN_ON(!mvmsta)) {
			ret = -EIO;
			goto out_unlock;
		}

		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);

		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3663 3664 3665 3666

		ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
		if (ret)
			goto out_unlock;
3667 3668

		iwl_mvm_stop_session_protection(mvm, vif);
3669 3670
	}

3671 3672 3673 3674
	mvmvif->ps_disabled = false;

	ret = iwl_mvm_power_update_ps(mvm);

3675
out_unlock:
3676 3677 3678 3679 3680
	mutex_unlock(&mvm->mutex);

	return ret;
}

3681 3682 3683 3684 3685 3686
static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif, u32 queues, bool drop)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif;
	struct iwl_mvm_sta *mvmsta;
3687 3688 3689
	struct ieee80211_sta *sta;
	int i;
	u32 msk = 0;
3690 3691 3692 3693 3694 3695 3696

	if (!vif || vif->type != NL80211_IFTYPE_STATION)
		return;

	mutex_lock(&mvm->mutex);
	mvmvif = iwl_mvm_vif_from_mac80211(vif);

3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711
	/* flush the AP-station and all TDLS peers */
	for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
						lockdep_is_held(&mvm->mutex));
		if (IS_ERR_OR_NULL(sta))
			continue;

		mvmsta = iwl_mvm_sta_from_mac80211(sta);
		if (mvmsta->vif != vif)
			continue;

		/* make sure only TDLS peers or the AP are flushed */
		WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);

		msk |= mvmsta->tfd_queue_msk;
3712
	}
3713

3714
	if (drop) {
3715
		if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3716 3717 3718 3719
			IWL_ERR(mvm, "flush request fail\n");
		mutex_unlock(&mvm->mutex);
	} else {
		mutex_unlock(&mvm->mutex);
3720

3721 3722 3723 3724 3725
		/* this can take a while, and we may need/want other operations
		 * to succeed while doing this, so do it without the mutex held
		 */
		iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
	}
3726 3727
}

3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739
static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
				  struct survey_info *survey)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

	memset(survey, 0, sizeof(*survey));

	/* only support global statistics right now */
	if (idx != 0)
		return -ENOENT;

3740
	if (fw_has_capa(&mvm->fw->ucode_capa,
3741 3742 3743 3744 3745 3746
			IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
		return -ENOENT;

	mutex_lock(&mvm->mutex);

	if (mvm->ucode_loaded) {
3747
		ret = iwl_mvm_request_statistics(mvm, false);
3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771
		if (ret)
			goto out;
	}

	survey->filled = SURVEY_INFO_TIME |
			 SURVEY_INFO_TIME_RX |
			 SURVEY_INFO_TIME_TX |
			 SURVEY_INFO_TIME_SCAN;
	survey->time = mvm->accu_radio_stats.on_time_rf +
		       mvm->radio_stats.on_time_rf;
	do_div(survey->time, USEC_PER_MSEC);

	survey->time_rx = mvm->accu_radio_stats.rx_time +
			  mvm->radio_stats.rx_time;
	do_div(survey->time_rx, USEC_PER_MSEC);

	survey->time_tx = mvm->accu_radio_stats.tx_time +
			  mvm->radio_stats.tx_time;
	do_div(survey->time_tx, USEC_PER_MSEC);

	survey->time_scan = mvm->accu_radio_stats.on_time_scan +
			    mvm->radio_stats.on_time_scan;
	do_div(survey->time_scan, USEC_PER_MSEC);

3772
	ret = 0;
3773 3774 3775 3776 3777
 out:
	mutex_unlock(&mvm->mutex);
	return ret;
}

3778 3779 3780 3781 3782 3783 3784 3785 3786
static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif,
				       struct ieee80211_sta *sta,
				       struct station_info *sinfo)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);

3787 3788
	if (fw_has_capa(&mvm->fw->ucode_capa,
			IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817
		return;

	/* if beacon filtering isn't on mac80211 does it anyway */
	if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
		return;

	if (!vif->bss_conf.assoc)
		return;

	mutex_lock(&mvm->mutex);

	if (mvmvif->ap_sta_id != mvmsta->sta_id)
		goto unlock;

	if (iwl_mvm_request_statistics(mvm, false))
		goto unlock;

	sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
			   mvmvif->beacon_stats.accu_num_beacons;
	sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
	if (mvmvif->beacon_stats.avg_signal) {
		/* firmware only reports a value after RXing a few beacons */
		sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
		sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
	}
 unlock:
	mutex_unlock(&mvm->mutex);
}

3818 3819 3820
static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif,
					const struct ieee80211_event *event)
3821
{
3822
#define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)	\
3823 3824 3825
	do {							\
		if ((_cnt) && --(_cnt))				\
			break;					\
3826
		iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871
	} while (0)

	struct iwl_fw_dbg_trigger_tlv *trig;
	struct iwl_fw_dbg_trigger_mlme *trig_mlme;

	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
		return;

	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
	trig_mlme = (void *)trig->data;
	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
		return;

	if (event->u.mlme.data == ASSOC_EVENT) {
		if (event->u.mlme.status == MLME_DENIED)
			CHECK_MLME_TRIGGER(mvm, trig, buf,
					   trig_mlme->stop_assoc_denied,
					   "DENIED ASSOC: reason %d",
					    event->u.mlme.reason);
		else if (event->u.mlme.status == MLME_TIMEOUT)
			CHECK_MLME_TRIGGER(mvm, trig, buf,
					   trig_mlme->stop_assoc_timeout,
					   "ASSOC TIMEOUT");
	} else if (event->u.mlme.data == AUTH_EVENT) {
		if (event->u.mlme.status == MLME_DENIED)
			CHECK_MLME_TRIGGER(mvm, trig, buf,
					   trig_mlme->stop_auth_denied,
					   "DENIED AUTH: reason %d",
					   event->u.mlme.reason);
		else if (event->u.mlme.status == MLME_TIMEOUT)
			CHECK_MLME_TRIGGER(mvm, trig, buf,
					   trig_mlme->stop_auth_timeout,
					   "AUTH TIMEOUT");
	} else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
		CHECK_MLME_TRIGGER(mvm, trig, buf,
				   trig_mlme->stop_rx_deauth,
				   "DEAUTH RX %d", event->u.mlme.reason);
	} else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
		CHECK_MLME_TRIGGER(mvm, trig, buf,
				   trig_mlme->stop_tx_deauth,
				   "DEAUTH TX %d", event->u.mlme.reason);
	}
#undef CHECK_MLME_TRIGGER
}

3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940
static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
					  struct ieee80211_vif *vif,
					  const struct ieee80211_event *event)
{
	struct iwl_fw_dbg_trigger_tlv *trig;
	struct iwl_fw_dbg_trigger_ba *ba_trig;

	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
		return;

	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
	ba_trig = (void *)trig->data;
	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
		return;

	if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
		return;

	iwl_mvm_fw_dbg_collect_trig(mvm, trig,
				    "BAR received from %pM, tid %d, ssn %d",
				    event->u.ba.sta->addr, event->u.ba.tid,
				    event->u.ba.ssn);
}

static void
iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
				     struct ieee80211_vif *vif,
				     const struct ieee80211_event *event)
{
	struct iwl_fw_dbg_trigger_tlv *trig;
	struct iwl_fw_dbg_trigger_ba *ba_trig;

	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
		return;

	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
	ba_trig = (void *)trig->data;
	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
		return;

	if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
		return;

	iwl_mvm_fw_dbg_collect_trig(mvm, trig,
				    "Frame from %pM timed out, tid %d",
				    event->u.ba.sta->addr, event->u.ba.tid);
}

static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif,
				       const struct ieee80211_event *event)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	switch (event->type) {
	case MLME_EVENT:
		iwl_mvm_event_mlme_callback(mvm, vif, event);
		break;
	case BAR_RX_EVENT:
		iwl_mvm_event_bar_rx_callback(mvm, vif, event);
		break;
	case BA_FRAME_TIMEOUT:
		iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
		break;
	default:
		break;
	}
}

3941
const struct ieee80211_ops iwl_mvm_hw_ops = {
J
Johannes Berg 已提交
3942 3943 3944
	.tx = iwl_mvm_mac_tx,
	.ampdu_action = iwl_mvm_mac_ampdu_action,
	.start = iwl_mvm_mac_start,
3945
	.reconfig_complete = iwl_mvm_mac_reconfig_complete,
J
Johannes Berg 已提交
3946 3947 3948 3949
	.stop = iwl_mvm_mac_stop,
	.add_interface = iwl_mvm_mac_add_interface,
	.remove_interface = iwl_mvm_mac_remove_interface,
	.config = iwl_mvm_mac_config,
3950
	.prepare_multicast = iwl_mvm_prepare_multicast,
J
Johannes Berg 已提交
3951
	.configure_filter = iwl_mvm_configure_filter,
3952
	.config_iface_filter = iwl_mvm_config_iface_filter,
J
Johannes Berg 已提交
3953 3954 3955
	.bss_info_changed = iwl_mvm_bss_info_changed,
	.hw_scan = iwl_mvm_mac_hw_scan,
	.cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3956
	.sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
J
Johannes Berg 已提交
3957 3958 3959
	.sta_state = iwl_mvm_mac_sta_state,
	.sta_notify = iwl_mvm_mac_sta_notify,
	.allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3960
	.release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
J
Johannes Berg 已提交
3961
	.set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3962
	.sta_rc_update = iwl_mvm_sta_rc_update,
J
Johannes Berg 已提交
3963 3964
	.conf_tx = iwl_mvm_mac_conf_tx,
	.mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3965
	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3966
	.flush = iwl_mvm_mac_flush,
3967 3968
	.sched_scan_start = iwl_mvm_mac_sched_scan_start,
	.sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
J
Johannes Berg 已提交
3969 3970 3971 3972 3973 3974 3975 3976 3977
	.set_key = iwl_mvm_mac_set_key,
	.update_tkip_key = iwl_mvm_mac_update_tkip_key,
	.remain_on_channel = iwl_mvm_roc,
	.cancel_remain_on_channel = iwl_mvm_cancel_roc,
	.add_chanctx = iwl_mvm_add_chanctx,
	.remove_chanctx = iwl_mvm_remove_chanctx,
	.change_chanctx = iwl_mvm_change_chanctx,
	.assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
	.unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3978
	.switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
J
Johannes Berg 已提交
3979

J
Johannes Berg 已提交
3980 3981 3982 3983
	.start_ap = iwl_mvm_start_ap_ibss,
	.stop_ap = iwl_mvm_stop_ap_ibss,
	.join_ibss = iwl_mvm_start_ap_ibss,
	.leave_ibss = iwl_mvm_stop_ap_ibss,
J
Johannes Berg 已提交
3984 3985 3986

	.set_tim = iwl_mvm_set_tim,

3987
	.channel_switch = iwl_mvm_channel_switch,
3988
	.pre_channel_switch = iwl_mvm_pre_channel_switch,
3989
	.post_channel_switch = iwl_mvm_post_channel_switch,
3990

3991 3992 3993 3994
	.tdls_channel_switch = iwl_mvm_tdls_channel_switch,
	.tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
	.tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,

3995 3996
	.event_callback = iwl_mvm_mac_event_callback,

3997 3998
	CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)

J
Johannes Berg 已提交
3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009
#ifdef CONFIG_PM_SLEEP
	/* look at d3.c */
	.suspend = iwl_mvm_suspend,
	.resume = iwl_mvm_resume,
	.set_wakeup = iwl_mvm_set_wakeup,
	.set_rekey_data = iwl_mvm_set_rekey_data,
#if IS_ENABLED(CONFIG_IPV6)
	.ipv6_addr_change = iwl_mvm_ipv6_addr_change,
#endif
	.set_default_unicast_key = iwl_mvm_set_default_unicast_key,
#endif
4010
	.get_survey = iwl_mvm_mac_get_survey,
4011
	.sta_statistics = iwl_mvm_mac_sta_statistics,
J
Johannes Berg 已提交
4012
};