mac80211.c 85.9 KB
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/******************************************************************************
 *
 * 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
 *
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 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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 *
 * 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
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 * in the file called COPYING.
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 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
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 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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 * 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>
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#include <linux/ip.h>
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#include <linux/if_arp.h>
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#include <linux/devcoredump.h>
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#include <net/mac80211.h>
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#include <net/ieee80211_radiotap.h>
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#include <net/tcp.h>
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#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 "fw-api-scan.h"
#include "iwl-phy-db.h"
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#include "testmode.h"
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#include "iwl-fw-error-dump.h"
#include "iwl-prph.h"
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static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
	{
		.max = 1,
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		.types = BIT(NL80211_IFTYPE_STATION),
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	},
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	{
		.max = 1,
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		.types = BIT(NL80211_IFTYPE_AP) |
			BIT(NL80211_IFTYPE_P2P_CLIENT) |
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			BIT(NL80211_IFTYPE_P2P_GO),
	},
	{
		.max = 1,
		.types = BIT(NL80211_IFTYPE_P2P_DEVICE),
	},
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};

static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
	{
		.num_different_channels = 1,
		.max_interfaces = 3,
		.limits = iwl_mvm_limits,
		.n_limits = ARRAY_SIZE(iwl_mvm_limits),
	},
};

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#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

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#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
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/*
 * 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,
};

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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),
			},
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			{
				/* 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),
			},
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		},
	},
	/* last filter must be empty */
	{},
};
#endif

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void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
{
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	if (!iwl_mvm_is_d0i3_supported(mvm))
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		return;

	IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
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	spin_lock_bh(&mvm->refs_lock);
	mvm->refs[ref_type]++;
	spin_unlock_bh(&mvm->refs_lock);
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	iwl_trans_ref(mvm->trans);
}

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

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

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static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
				     enum iwl_mvm_ref_type except_ref)
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{
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	int i, j;
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	if (!iwl_mvm_is_d0i3_supported(mvm))
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		return;

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

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		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;
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	}
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	spin_unlock_bh(&mvm->refs_lock);
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}

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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;
}

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int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
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{
	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;
}

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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;
	}
}

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int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
{
	struct ieee80211_hw *hw = mvm->hw;
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	int num_mac, ret, i;
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	/* Tell mac80211 our characteristics */
	hw->flags = IEEE80211_HW_SIGNAL_DBM |
		    IEEE80211_HW_SPECTRUM_MGMT |
		    IEEE80211_HW_REPORTS_TX_ACK_STATUS |
		    IEEE80211_HW_QUEUE_CONTROL |
		    IEEE80211_HW_WANT_MONITOR_VIF |
		    IEEE80211_HW_SUPPORTS_PS |
		    IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
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		    IEEE80211_HW_AMPDU_AGGREGATION |
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		    IEEE80211_HW_TIMING_BEACON_ONLY |
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		    IEEE80211_HW_CONNECTION_MONITOR |
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		    IEEE80211_HW_CHANCTX_STA_CSA |
		    IEEE80211_HW_SUPPORTS_CLONED_SKBS;
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	hw->queues = mvm->first_agg_queue;
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	hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
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	hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
				    IEEE80211_RADIOTAP_MCS_HAVE_STBC;
	hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
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	hw->rate_control_algorithm = "iwl-mvm-rs";

	/*
	 * 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 &&
	    !iwlwifi_mod_params.sw_crypto)
		hw->flags |= IEEE80211_HW_MFP_CAPABLE;

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	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
	    IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
	    !iwlwifi_mod_params.uapsd_disable) {
		hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
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		hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
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		hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
	}
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	if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
	    mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
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		hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;

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	hw->sta_data_size = sizeof(struct iwl_mvm_sta);
	hw->vif_data_size = sizeof(struct iwl_mvm_vif);
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	hw->chanctx_data_size = sizeof(u16);
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	hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
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		BIT(NL80211_IFTYPE_P2P_CLIENT) |
		BIT(NL80211_IFTYPE_AP) |
		BIT(NL80211_IFTYPE_P2P_GO) |
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		BIT(NL80211_IFTYPE_P2P_DEVICE) |
		BIT(NL80211_IFTYPE_ADHOC);
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	hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
	hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
				       REGULATORY_DISABLE_BEACON_HINTS;
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	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
		hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;

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	if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
		hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;

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	hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
	hw->wiphy->n_iface_combinations =
		ARRAY_SIZE(iwl_mvm_iface_combinations);

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	hw->wiphy->max_remain_on_channel_duration = 10000;
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	hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;

	/* 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;
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	/* 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,
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		       ETH_ALEN);
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		mvm->addresses[i].addr[5]++;
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		hw->wiphy->n_addresses++;
	}

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	iwl_mvm_reset_phy_ctxts(mvm);

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	hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
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	hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;

	if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
		hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
			&mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
	if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
		hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
			&mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];

	hw->wiphy->hw_version = mvm->trans->hw_id;

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	if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
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		hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
	else
		hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;

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	if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
		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;
	}
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	hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
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			       NL80211_FEATURE_LOW_PRIORITY_SCAN |
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			       NL80211_FEATURE_P2P_GO_OPPPS |
			       NL80211_FEATURE_DYNAMIC_SMPS |
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			       NL80211_FEATURE_STATIC_SMPS |
			       NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
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	if (mvm->fw->ucode_capa.capa[0] &
	    IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
		hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
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	if (mvm->fw->ucode_capa.capa[0] &
	    IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
		hw->wiphy->features |= NL80211_FEATURE_QUIET;
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	if (mvm->fw->ucode_capa.capa[0] &
	    IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
		hw->wiphy->features |=
			NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;

	if (mvm->fw->ucode_capa.capa[0] &
	    IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
		hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;

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	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;

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	/* currently FW API supports only one optional cipher scheme */
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	if (mvm->fw->cs[0].cipher) {
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		mvm->hw->n_cipher_schemes = 1;
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		mvm->hw->cipher_schemes = &mvm->fw->cs[0];
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	}

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#ifdef CONFIG_PM_SLEEP
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	if (iwl_mvm_is_d0i3_supported(mvm) &&
	    device_can_wakeup(mvm->trans->dev)) {
		mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
		hw->wiphy->wowlan = &mvm->wowlan;
	} else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
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	    mvm->trans->ops->d3_suspend &&
	    mvm->trans->ops->d3_resume &&
	    device_can_wakeup(mvm->trans->dev)) {
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		mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
				    WIPHY_WOWLAN_DISCONNECT |
				    WIPHY_WOWLAN_EAP_IDENTITY_REQ |
				    WIPHY_WOWLAN_RFKILL_RELEASE;
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		if (!iwlwifi_mod_params.sw_crypto)
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			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;
		mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
		hw->wiphy->wowlan = &mvm->wowlan;
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	}
#endif

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#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
	/* assign default bcast filtering configuration */
	mvm->bcast_filters = iwl_mvm_default_bcast_filters;
#endif

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	ret = iwl_mvm_leds_init(mvm);
	if (ret)
		return ret;

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	ret = ieee80211_register_hw(mvm->hw);
	if (ret)
		iwl_mvm_leds_exit(mvm);

	return ret;
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}

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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;
}

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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);
542 543 544
	struct ieee80211_sta *sta = control->sta;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (void *)skb->data;
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Johannes Berg 已提交
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546 547
	if (iwl_mvm_is_radio_killed(mvm)) {
		IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
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		goto drop;
	}

551
	if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
552 553
	    !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
	    !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
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		goto drop;

556 557 558 559 560 561 562 563 564
	/* 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) {
565 566
		if (iwl_mvm_defer_tx(mvm, sta, skb))
			return;
567
		if (iwl_mvm_tx_skb(mvm, skb, sta))
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			goto drop;
		return;
	}

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

579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596
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;
}

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static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif,
				    enum ieee80211_ampdu_mlme_action action,
				    struct ieee80211_sta *sta, u16 tid,
				    u16 *ssn, u8 buf_size)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;
605
	bool tx_agg_ref = false;
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	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;

613
	/* return from D0i3 before starting a new Tx aggregation */
614 615 616 617 618 619
	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:
620
		/*
621 622 623 624 625 626
		 * 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.
627
		 */
628 629 630 631 632
		ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
		if (ret)
			return ret;

		tx_agg_ref = true;
633 634 635
		break;
	default:
		break;
636 637
	}

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	mutex_lock(&mvm->mutex);

	switch (action) {
	case IEEE80211_AMPDU_RX_START:
642
		if (!iwl_enable_rx_ampdu(mvm->cfg)) {
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			ret = -EINVAL;
			break;
		}
		ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
		break;
	case IEEE80211_AMPDU_RX_STOP:
		ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
		break;
	case IEEE80211_AMPDU_TX_START:
652
		if (!iwl_enable_tx_ampdu(mvm->cfg)) {
653 654 655
			ret = -EINVAL;
			break;
		}
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		ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
		break;
	case IEEE80211_AMPDU_TX_STOP_CONT:
659 660
		ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
		break;
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	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
663
		ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
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		break;
	case IEEE80211_AMPDU_TX_OPERATIONAL:
		ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
		break;
	default:
		WARN_ON_ONCE(1);
		ret = -EINVAL;
		break;
	}
	mutex_unlock(&mvm->mutex);

675 676 677 678 679 680 681
	/*
	 * 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);

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	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;

	/* does this make sense at all? */
	mvmvif->color++;

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

701
	mvmvif->phy_ctxt = NULL;
702
	memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
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}

705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
				     const void *data, size_t datalen)
{
	const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
	ssize_t bytes_read;
	ssize_t bytes_read_trans;

	if (offset < dump_ptrs->op_mode_len) {
		bytes_read = min_t(ssize_t, count,
				   dump_ptrs->op_mode_len - offset);
		memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
		       bytes_read);
		offset += bytes_read;
		count -= bytes_read;

		if (count == 0)
			return bytes_read;
	} else {
		bytes_read = 0;
	}

	if (!dump_ptrs->trans_ptr)
		return bytes_read;

	offset -= dump_ptrs->op_mode_len;
	bytes_read_trans = min_t(ssize_t, count,
				 dump_ptrs->trans_ptr->len - offset);
	memcpy(buffer + bytes_read,
	       (u8 *)dump_ptrs->trans_ptr->data + offset,
	       bytes_read_trans);

	return bytes_read + bytes_read_trans;
}

static void iwl_mvm_free_coredump(const void *data)
{
	const struct iwl_mvm_dump_ptrs *fw_error_dump = data;

	vfree(fw_error_dump->op_mode_ptr);
	vfree(fw_error_dump->trans_ptr);
	kfree(fw_error_dump);
}

748
void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
749 750 751 752
{
	struct iwl_fw_error_dump_file *dump_file;
	struct iwl_fw_error_dump_data *dump_data;
	struct iwl_fw_error_dump_info *dump_info;
753
	struct iwl_mvm_dump_ptrs *fw_error_dump;
754 755 756 757 758 759 760 761
	const struct fw_img *img;
	u32 sram_len, sram_ofs;
	u32 file_len, rxf_len;
	unsigned long flags;
	int reg_val;

	lockdep_assert_held(&mvm->mutex);

762
	fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
763 764 765
	if (!fw_error_dump)
		return;

766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782
	img = &mvm->fw->img[mvm->cur_ucode];
	sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
	sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;

	/* reading buffer size */
	reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
	rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;

	/* the register holds the value divided by 128 */
	rxf_len = rxf_len << 7;

	file_len = sizeof(*dump_file) +
		   sizeof(*dump_data) * 3 +
		   sram_len +
		   rxf_len +
		   sizeof(*dump_info);

783
	dump_file = vzalloc(file_len);
784 785
	if (!dump_file) {
		kfree(fw_error_dump);
786
		return;
787
	}
788

789
	fw_error_dump->op_mode_ptr = dump_file;
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

	dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
	dump_data = (void *)dump_file->data;

	dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
	dump_data->len = cpu_to_le32(sizeof(*dump_info));
	dump_info = (void *) dump_data->data;
	dump_info->device_family =
		mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
			cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
			cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
	memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
	       sizeof(dump_info->fw_human_readable));
	strncpy(dump_info->dev_human_readable, mvm->cfg->name,
		sizeof(dump_info->dev_human_readable));
	strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
		sizeof(dump_info->bus_human_readable));

	dump_data = iwl_fw_error_next_data(dump_data);
	dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
	dump_data->len = cpu_to_le32(rxf_len);

	if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
		u32 *rxf = (void *)dump_data->data;
		int i;

		for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
			iwl_trans_write_prph(mvm->trans,
					     RXF_LD_FENCE_OFFSET_ADDR,
					     i * sizeof(u32));
			rxf[i] = iwl_trans_read_prph(mvm->trans,
						     RXF_FIFO_RD_FENCE_ADDR);
		}
		iwl_trans_release_nic_access(mvm->trans, &flags);
	}

	dump_data = iwl_fw_error_next_data(dump_data);
	dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
	dump_data->len = cpu_to_le32(sram_len);
	iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
				 sram_len);

832 833 834 835 836
	fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
	fw_error_dump->op_mode_len = file_len;
	if (fw_error_dump->trans_ptr)
		file_len += fw_error_dump->trans_ptr->len;
	dump_file->file_len = cpu_to_le32(file_len);
837

838 839
	dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
		      GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
840 841
}

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static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
{
844 845 846 847 848 849
	/* 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
	 */
	if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
		iwl_mvm_fw_error_dump(mvm);
850

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851 852 853
	iwl_trans_stop_device(mvm->trans);

	mvm->scan_status = IWL_MVM_SCAN_NONE;
854
	mvm->ps_disabled = false;
855
	mvm->calibrating = false;
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Johannes Berg 已提交
856 857 858 859 860 861 862 863

	/* just in case one was running */
	ieee80211_remain_on_channel_expired(mvm->hw);

	ieee80211_iterate_active_interfaces_atomic(
		mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
		iwl_mvm_cleanup_iterator, mvm);

864
	mvm->p2p_device_vif = NULL;
865
	mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
866 867

	iwl_mvm_reset_phy_ctxts(mvm);
J
Johannes Berg 已提交
868 869
	memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
	memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
870 871 872 873 874 875
	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));
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Johannes Berg 已提交
876 877 878

	ieee80211_wake_queues(mvm->hw);

879 880 881 882
	/* 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);

883 884 885
	/* clear any stale d0i3 state */
	clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);

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Johannes Berg 已提交
886
	mvm->vif_count = 0;
887
	mvm->rx_ba_sessions = 0;
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888 889
}

890
int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
891 892 893
{
	int ret;

894
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
895 896 897 898 899 900

	/* Clean up some internal and mac80211 state on restart */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
		iwl_mvm_restart_cleanup(mvm);

	ret = iwl_mvm_up(mvm);
901 902 903 904 905 906 907 908 909 910

	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);
	}

911 912 913 914 915 916 917 918 919 920
	return ret;
}

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

	mutex_lock(&mvm->mutex);
	ret = __iwl_mvm_mac_start(mvm);
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	mutex_unlock(&mvm->mutex);

	return ret;
}

926
static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
927 928 929 930 931 932
{
	int ret;

	mutex_lock(&mvm->mutex);

	clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
933
	iwl_mvm_d0i3_enable_tx(mvm, NULL);
934
	ret = iwl_mvm_update_quotas(mvm, NULL);
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935 936 937 938
	if (ret)
		IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
			ret);

939 940 941
	/* allow transport/FW low power modes */
	iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);

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942 943 944
	mutex_unlock(&mvm->mutex);
}

945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963
static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
{
	bool exit_now;

	if (!iwl_mvm_is_d0i3_supported(mvm))
		return;

	mutex_lock(&mvm->d0i3_suspend_mutex);
	__clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
	exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
					&mvm->d0i3_suspend_flags);
	mutex_unlock(&mvm->d0i3_suspend_mutex);

	if (exit_now) {
		IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
		_iwl_mvm_exit_d0i3(mvm);
	}
}

964 965 966 967 968 969 970 971 972 973 974
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:
975
		iwl_mvm_resume_complete(mvm);
976 977 978 979
		break;
	}
}

980
void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
981
{
982
	lockdep_assert_held(&mvm->mutex);
983 984 985 986

	/* disallow low power states when the FW is down */
	iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);

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Johannes Berg 已提交
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	/* 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.
	 */
	cancel_work_sync(&mvm->roc_done_wk);

	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 */
1001
	iwl_mvm_del_aux_sta(mvm);
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Johannes Berg 已提交
1002

1003
	mvm->ucode_loaded = false;
1004
}
1005

1006 1007 1008 1009 1010 1011
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);
1012
	flush_work(&mvm->fw_error_dump_wk);
1013 1014 1015

	mutex_lock(&mvm->mutex);
	__iwl_mvm_mac_stop(mvm);
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	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);
}

1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038
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;
}

1039 1040 1041 1042 1043 1044 1045 1046 1047
static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
				s8 tx_power)
{
	/* FW is in charge of regulatory enforcement */
	struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
		.mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
		.pwr_restriction = cpu_to_le16(tx_power),
	};

E
Emmanuel Grumbach 已提交
1048
	return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1049 1050 1051 1052
				    sizeof(reduce_txpwr_cmd),
				    &reduce_txpwr_cmd);
}

J
Johannes Berg 已提交
1053 1054 1055 1056 1057 1058 1059
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;

1060 1061 1062 1063 1064 1065 1066 1067 1068
	/*
	 * 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
1069 1070 1071 1072 1073 1074 1075 1076
	/*
	 * 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);

1077
	/* Allocate resources for the MAC context, and add it to the fw  */
J
Johannes Berg 已提交
1078 1079 1080 1081
	ret = iwl_mvm_mac_ctxt_init(mvm, vif);
	if (ret)
		goto out_unlock;

1082
	/* Counting number of interfaces is needed for legacy PM */
1083 1084 1085
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count++;

J
Johannes Berg 已提交
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096
	/*
	 * 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
1097 1098
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1099
		ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1100 1101 1102 1103 1104
		if (ret) {
			IWL_ERR(mvm, "Failed to allocate bcast sta\n");
			goto out_release;
		}

1105
		iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1106 1107 1108 1109 1110 1111 1112
		goto out_unlock;
	}

	ret = iwl_mvm_mac_ctxt_add(mvm, vif);
	if (ret)
		goto out_release;

1113
	ret = iwl_mvm_power_update_mac(mvm);
1114 1115
	if (ret)
		goto out_release;
J
Johannes Berg 已提交
1116

1117
	/* beacon filtering */
E
Emmanuel Grumbach 已提交
1118
	ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1119 1120 1121
	if (ret)
		goto out_remove_mac;

1122
	if (!mvm->bf_allowed_vif &&
1123
	    vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1124
		mvm->bf_allowed_vif = mvmvif;
1125 1126
		vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
				     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1127 1128
	}

J
Johannes Berg 已提交
1129 1130 1131 1132 1133 1134 1135
	/*
	 * 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) {

1136 1137 1138
		mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
		if (!mvmvif->phy_ctxt) {
			ret = -ENOSPC;
1139
			goto out_free_bf;
1140
		}
J
Johannes Berg 已提交
1141

1142
		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1143 1144
		ret = iwl_mvm_binding_add_vif(mvm, vif);
		if (ret)
1145
			goto out_unref_phy;
J
Johannes Berg 已提交
1146

1147
		ret = iwl_mvm_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1148 1149 1150 1151 1152 1153 1154 1155
		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;
	}

1156
	iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1157 1158 1159 1160
	goto out_unlock;

 out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
1161
 out_unref_phy:
1162
	iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1163 1164 1165
 out_free_bf:
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1166 1167
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1168
	}
J
Johannes Berg 已提交
1169 1170 1171 1172
 out_remove_mac:
	mvmvif->phy_ctxt = NULL;
	iwl_mvm_mac_ctxt_remove(mvm, vif);
 out_release:
1173 1174
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count--;
1175

J
Johannes Berg 已提交
1176 1177 1178 1179
	iwl_mvm_mac_ctxt_release(mvm, vif);
 out_unlock:
	mutex_unlock(&mvm->mutex);

1180 1181
	iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);

J
Johannes Berg 已提交
1182 1183 1184
	return ret;
}

1185 1186
static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1187
{
1188
	u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
J
Johannes Berg 已提交
1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207

	if (tfd_msk) {
		mutex_lock(&mvm->mutex);
		iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
		mutex_unlock(&mvm->mutex);
	}

	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
1208
		 * triggered. Flush it.
J
Johannes Berg 已提交
1209 1210 1211
		 */
		flush_work(&mvm->sta_drained_wk);
	}
1212 1213 1214 1215 1216 1217 1218 1219 1220
}

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
1221 1222 1223

	mutex_lock(&mvm->mutex);

1224 1225
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1226 1227
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1228 1229
	}

1230 1231
	iwl_mvm_vif_dbgfs_clean(mvm, vif);

J
Johannes Berg 已提交
1232 1233
	/*
	 * For AP/GO interface, the tear down of the resources allocated to the
1234
	 * interface is be handled as part of the stop_ap flow.
J
Johannes Berg 已提交
1235
	 */
J
Johannes Berg 已提交
1236 1237
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1238 1239 1240 1241 1242 1243
#ifdef CONFIG_NL80211_TESTMODE
		if (vif == mvm->noa_vif) {
			mvm->noa_vif = NULL;
			mvm->noa_duration = 0;
		}
#endif
1244
		iwl_mvm_dealloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1245 1246 1247 1248 1249
		goto out_release;
	}

	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		mvm->p2p_device_vif = NULL;
1250
		iwl_mvm_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1251
		iwl_mvm_binding_remove_vif(mvm, vif);
1252
		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1253 1254 1255
		mvmvif->phy_ctxt = NULL;
	}

1256
	if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
J
Johannes Berg 已提交
1257
		mvm->vif_count--;
1258

1259
	iwl_mvm_power_update_mac(mvm);
J
Johannes Berg 已提交
1260 1261 1262 1263 1264 1265 1266 1267
	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)
1268
{
J
Johannes Berg 已提交
1269 1270 1271
	return 0;
}

1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296
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);

1297
	ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1298 1299 1300 1301 1302 1303 1304 1305
	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,
1306 1307
	};

1308 1309 1310 1311 1312
	lockdep_assert_held(&mvm->mutex);

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

1313
	ieee80211_iterate_active_interfaces_atomic(
1314 1315
		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
		iwl_mvm_mc_iface_iterator, &iter_data);
1316 1317
}

1318 1319
static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
				     struct netdev_hw_addr_list *mc_list)
J
Johannes Berg 已提交
1320
{
1321 1322 1323
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mcast_filter_cmd *cmd;
	struct netdev_hw_addr *addr;
1324 1325
	int addr_count;
	bool pass_all;
1326 1327
	int len;

1328 1329 1330 1331
	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)
1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352
		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
1353 1354 1355 1356 1357 1358 1359
}

static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
				     unsigned int changed_flags,
				     unsigned int *total_flags,
				     u64 multicast)
{
1360 1361
	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
1362

1363
	mutex_lock(&mvm->mutex);
1364

1365 1366 1367
	/* replace previous configuration */
	kfree(mvm->mcast_filter_cmd);
	mvm->mcast_filter_cmd = cmd;
1368

1369 1370
	if (!cmd)
		goto out;
1371

1372 1373 1374 1375
	iwl_mvm_recalc_multicast(mvm);
out:
	mutex_unlock(&mvm->mutex);
	*total_flags = 0;
1376 1377
}

1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400
#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;

1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416
		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;
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435
		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];

1436 1437 1438 1439 1440 1441
	/*
	 * enable filtering only for associated stations, but not for P2P
	 * Clients
	 */
	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
	    !vif->bss_conf.assoc)
1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475
		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++;
	}
}

1476 1477
bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
				    struct iwl_bcast_filter_cmd *cmd)
1478 1479 1480
{
	struct iwl_bcast_iter_data iter_data = {
		.mvm = mvm,
1481
		.cmd = cmd,
1482 1483
	};

1484 1485 1486
	if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
		return false;

1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500
	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
1501 1502 1503

	/* if no filters are configured, do nothing */
	if (!mvm->bcast_filters)
1504
		return false;
1505 1506 1507 1508 1509 1510

	/* 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);

1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523
	return true;
}
static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
					  struct ieee80211_vif *vif)
{
	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
1524
	return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1525 1526 1527 1528 1529 1530 1531 1532 1533 1534
				    sizeof(cmd), &cmd);
}
#else
static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
						 struct ieee80211_vif *vif)
{
	return 0;
}
#endif

J
Johannes Berg 已提交
1535 1536 1537 1538 1539 1540 1541 1542
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;

1543 1544 1545 1546 1547 1548 1549 1550
	/*
	 * 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);

1551 1552 1553 1554 1555 1556 1557 1558 1559 1560
	/*
	 * 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
1561 1562 1563
	if (ret)
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);

1564 1565 1566 1567
	/* 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
1568 1569 1570
	if (changes & BSS_CHANGED_ASSOC) {
		if (bss_conf->assoc) {
			/* add quota for this interface */
1571
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1572 1573 1574 1575
			if (ret) {
				IWL_ERR(mvm, "failed to update quotas\n");
				return;
			}
1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594

			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,
1595
							5 * dur, false);
1596
			}
1597 1598

			iwl_mvm_sf_update(mvm, vif, false);
1599
			iwl_mvm_power_vif_assoc(mvm, vif);
1600
			if (vif->p2p) {
1601
				iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1602 1603 1604 1605
				iwl_mvm_update_smps(mvm, vif,
						    IWL_MVM_SMPS_REQ_PROT,
						    IEEE80211_SMPS_DYNAMIC);
			}
J
Johannes Berg 已提交
1606
		} else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1607 1608 1609 1610 1611 1612 1613
			/*
			 * 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
1614 1615 1616 1617
			/* 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");
1618 1619 1620

			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
1621 1622
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
			/* remove quota for this interface */
1623
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1624 1625
			if (ret)
				IWL_ERR(mvm, "failed to update quotas\n");
1626 1627 1628

			if (vif->p2p)
				iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1629 1630 1631 1632 1633 1634 1635

			/* 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
1636
		}
1637

1638
		iwl_mvm_recalc_multicast(mvm);
1639
		iwl_mvm_configure_bcast_filter(mvm, vif);
1640

1641 1642 1643
		/* reset rssi values */
		mvmvif->bf_data.ave_beacon_signal = 0;

1644
		iwl_mvm_bt_coex_vif_change(mvm);
1645 1646
		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
				    IEEE80211_SMPS_AUTOMATIC);
1647
	} else if (changes & BSS_CHANGED_BEACON_INFO) {
1648 1649 1650 1651 1652 1653
		/*
		 * 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
1654
	}
1655 1656 1657 1658 1659 1660

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

1661 1662 1663 1664 1665 1666
	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");
	}

1667 1668 1669 1670 1671
	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);
	}
1672 1673

	if (changes & BSS_CHANGED_CQM) {
1674
		IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1675 1676
		/* reset cqm events tracking */
		mvmvif->bf_data.last_cqm_event = 0;
1677 1678 1679 1680 1681 1682
		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");
		}
1683
	}
1684 1685

	if (changes & BSS_CHANGED_ARP_FILTER) {
1686
		IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1687 1688
		iwl_mvm_configure_bcast_filter(mvm, vif);
	}
J
Johannes Berg 已提交
1689 1690
}

J
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1691 1692
static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
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1693 1694 1695 1696 1697
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

1698 1699 1700 1701 1702 1703 1704 1705
	/*
	 * 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;

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1706 1707 1708 1709 1710 1711 1712
	mutex_lock(&mvm->mutex);

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

1713 1714 1715 1716 1717 1718 1719
	/*
	 * 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);

J
Johannes Berg 已提交
1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731
	/* 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 */
1732
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1733 1734 1735
	if (ret)
		goto out_unbind;

1736 1737 1738
	/* must be set before quota calculations */
	mvmvif->ap_ibss_active = true;

1739
	/* power updated needs to be done before quotas */
1740
	iwl_mvm_power_update_mac(mvm);
1741

1742
	ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1743
	if (ret)
1744
		goto out_quota_failed;
J
Johannes Berg 已提交
1745

J
Johannes Berg 已提交
1746
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
1747
	if (vif->p2p && mvm->p2p_device_vif)
1748
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
1749

1750 1751
	iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);

1752
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
1753

1754 1755 1756 1757
	/* we don't support TDLS during DCM */
	if (iwl_mvm_phy_ctx_count(mvm) > 1)
		iwl_mvm_teardown_tdls_peers(mvm);

J
Johannes Berg 已提交
1758 1759 1760
	mutex_unlock(&mvm->mutex);
	return 0;

1761
out_quota_failed:
1762
	iwl_mvm_power_update_mac(mvm);
1763
	mvmvif->ap_ibss_active = false;
1764
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1765 1766 1767 1768 1769 1770
out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
out_remove:
	iwl_mvm_mac_ctxt_remove(mvm, vif);
out_unlock:
	mutex_unlock(&mvm->mutex);
1771
	iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
J
Johannes Berg 已提交
1772 1773 1774
	return ret;
}

J
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1775 1776
static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1777 1778 1779 1780
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

1781 1782
	iwl_mvm_prepare_mac_removal(mvm, vif);

J
Johannes Berg 已提交
1783 1784
	mutex_lock(&mvm->mutex);

1785
	/* Handle AP stop while in CSA */
1786 1787 1788
	if (rcu_access_pointer(mvm->csa_vif) == vif) {
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
1789
		RCU_INIT_POINTER(mvm->csa_vif, NULL);
1790
	}
1791

1792 1793 1794 1795 1796
	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
1797
	mvmvif->ap_ibss_active = false;
1798
	mvm->ap_last_beacon_gp2 = 0;
J
Johannes Berg 已提交
1799

1800
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
1801

1802 1803
	iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);

J
Johannes Berg 已提交
1804
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
1805
	if (vif->p2p && mvm->p2p_device_vif)
1806
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
1807

1808
	iwl_mvm_update_quotas(mvm, NULL);
1809
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1810
	iwl_mvm_binding_remove_vif(mvm, vif);
1811

1812
	iwl_mvm_power_update_mac(mvm);
1813

J
Johannes Berg 已提交
1814 1815 1816 1817 1818
	iwl_mvm_mac_ctxt_remove(mvm, vif);

	mutex_unlock(&mvm->mutex);
}

J
Johannes Berg 已提交
1819 1820 1821 1822 1823
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
1824
{
1825
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1826

1827 1828 1829 1830
	/* Changes will be applied when the AP/IBSS is started */
	if (!mvmvif->ap_ibss_active)
		return;

1831
	if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1832
		       BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1833
	    iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1834
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1835

J
Johannes Berg 已提交
1836
	/* Need to send a new beacon template to the FW */
1837 1838 1839
	if (changes & BSS_CHANGED_BEACON &&
	    iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
		IWL_WARN(mvm, "Failed updating beacon data\n");
1840 1841 1842 1843 1844 1845 1846

	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
1847 1848 1849 1850 1851 1852 1853 1854 1855
}

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);

1856 1857 1858 1859 1860 1861 1862 1863
	/*
	 * 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
1864 1865
	mutex_lock(&mvm->mutex);

1866
	if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1867
		iwl_mvm_scan_offload_stop(mvm, true);
1868

J
Johannes Berg 已提交
1869 1870 1871 1872 1873
	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
1874 1875
	case NL80211_IFTYPE_ADHOC:
		iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
J
Johannes Berg 已提交
1876 1877 1878 1879 1880 1881 1882
		break;
	default:
		/* shouldn't happen */
		WARN_ON_ONCE(1);
	}

	mutex_unlock(&mvm->mutex);
1883
	iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
J
Johannes Berg 已提交
1884 1885
}

1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926
static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
					  enum iwl_scan_status scan_type)
{
	int ret;
	bool wait_for_handlers = false;

	mutex_lock(&mvm->mutex);

	if (mvm->scan_status != scan_type) {
		ret = 0;
		/* make sure there are no pending notifications */
		wait_for_handlers = true;
		goto out;
	}

	switch (scan_type) {
	case IWL_MVM_SCAN_SCHED:
		ret = iwl_mvm_scan_offload_stop(mvm, true);
		break;
	case IWL_MVM_SCAN_OS:
		ret = iwl_mvm_cancel_scan(mvm);
		break;
	case IWL_MVM_SCAN_NONE:
	default:
		WARN_ON_ONCE(1);
		ret = -EINVAL;
		break;
	}
	if (ret)
		goto out;

	wait_for_handlers = true;
out:
	mutex_unlock(&mvm->mutex);

	/* make sure we consume the completion notification */
	if (wait_for_handlers)
		iwl_mvm_wait_for_async_handlers(mvm);

	return ret;
}
J
Johannes Berg 已提交
1927 1928
static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
1929
			       struct ieee80211_scan_request *hw_req)
J
Johannes Berg 已提交
1930 1931
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1932
	struct cfg80211_scan_request *req = &hw_req->req;
J
Johannes Berg 已提交
1933 1934
	int ret;

1935 1936
	if (req->n_channels == 0 ||
	    req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
J
Johannes Berg 已提交
1937 1938
		return -EINVAL;

1939 1940 1941 1942 1943
	if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
		ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
		if (ret)
			return ret;
	}
1944

J
Johannes Berg 已提交
1945 1946
	mutex_lock(&mvm->mutex);

1947
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
J
Johannes Berg 已提交
1948
		ret = -EBUSY;
1949 1950
		goto out;
	}
J
Johannes Berg 已提交
1951

1952 1953
	iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);

1954 1955
	if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
		ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1956 1957
	else if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
		ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
1958 1959 1960
	else
		ret = iwl_mvm_scan_request(mvm, vif, req);

1961 1962 1963
	if (ret)
		iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
out:
J
Johannes Berg 已提交
1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981
	mutex_unlock(&mvm->mutex);
	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);

	iwl_mvm_cancel_scan(mvm);

	mutex_unlock(&mvm->mutex);
}

static void
iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1982
				  struct ieee80211_sta *sta, u16 tids,
J
Johannes Berg 已提交
1983 1984 1985 1986 1987 1988
				  int num_frames,
				  enum ieee80211_frame_release_type reason,
				  bool more_data)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

1989
	/* Called when we need to transmit (a) frame(s) from mac80211 */
J
Johannes Berg 已提交
1990

1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
	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
2008 2009 2010 2011 2012 2013 2014 2015
}

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);
2016
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2017
	int tid;
J
Johannes Berg 已提交
2018 2019 2020

	switch (cmd) {
	case STA_NOTIFY_SLEEP:
2021
		if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
J
Johannes Berg 已提交
2022
			ieee80211_sta_block_awake(hw, sta, true);
2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035
		spin_lock_bh(&mvmsta->lock);
		for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
			struct iwl_mvm_tid_data *tid_data;

			tid_data = &mvmsta->tid_data[tid];
			if (tid_data->state != IWL_AGG_ON &&
			    tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
				continue;
			if (iwl_mvm_tid_queued(tid_data) == 0)
				continue;
			ieee80211_sta_set_buffered(sta, tid, true);
		}
		spin_unlock_bh(&mvmsta->lock);
J
Johannes Berg 已提交
2036 2037 2038 2039 2040 2041 2042
		/*
		 * 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:
2043
		if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
J
Johannes Berg 已提交
2044
			break;
2045
		iwl_mvm_sta_modify_ps_wake(mvm, sta);
J
Johannes Berg 已提交
2046 2047 2048 2049 2050 2051
		break;
	default:
		break;
	}
}

2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073
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);
	struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;

	/*
	 * 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));
	mutex_unlock(&mvm->mutex);
}

J
Johannes Berg 已提交
2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096
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) {
2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111
		/*
		 * 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;
		}
2112 2113 2114

		if (sta->tdls &&
		    (vif->p2p ||
2115 2116
		     iwl_mvm_tdls_sta_count(mvm, NULL) ==
						IWL_MVM_TDLS_STA_COUNT ||
2117 2118 2119 2120 2121 2122
		     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
2123
		ret = iwl_mvm_add_sta(mvm, vif, sta);
2124 2125
		if (sta->tdls && ret == 0)
			iwl_mvm_recalc_tdls_state(mvm, vif, true);
J
Johannes Berg 已提交
2126 2127
	} else if (old_state == IEEE80211_STA_NONE &&
		   new_state == IEEE80211_STA_AUTH) {
2128 2129 2130 2131 2132
		/*
		 * 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;
J
Johannes Berg 已提交
2133 2134 2135
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_ASSOC) {
2136 2137 2138
		ret = iwl_mvm_update_sta(mvm, vif, sta);
		if (ret == 0)
			iwl_mvm_rs_rate_init(mvm, sta,
2139 2140
					     mvmvif->phy_ctxt->channel->band,
					     true);
J
Johannes Berg 已提交
2141 2142
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTHORIZED) {
2143 2144 2145 2146 2147

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

2148
		/* enable beacon filtering */
2149
		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2150 2151 2152
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTHORIZED &&
		   new_state == IEEE80211_STA_ASSOC) {
2153
		/* disable beacon filtering */
E
Emmanuel Grumbach 已提交
2154
		WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2155 2156 2157 2158 2159 2160 2161 2162 2163 2164
		ret = 0;
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTH) {
		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);
2165 2166
		if (sta->tdls)
			iwl_mvm_recalc_tdls_state(mvm, vif, false);
J
Johannes Berg 已提交
2167 2168 2169
	} else {
		ret = -EIO;
	}
2170
 out_unlock:
J
Johannes Berg 已提交
2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184
	mutex_unlock(&mvm->mutex);

	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;
}

2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195
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
2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212
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);
2213
		ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
J
Johannes Berg 已提交
2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231
		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;

2232 2233 2234 2235 2236 2237 2238
	/*
	 * 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
2239 2240
	mutex_lock(&mvm->mutex);
	/* Try really hard to protect the session and hear a beacon */
2241
	iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
J
Johannes Berg 已提交
2242
	mutex_unlock(&mvm->mutex);
2243 2244

	iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
J
Johannes Berg 已提交
2245 2246
}

2247 2248 2249
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
2250
					struct ieee80211_scan_ies *ies)
2251 2252 2253 2254
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

2255 2256 2257 2258 2259
	if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
		ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
		if (ret)
			return ret;
	}
2260

2261 2262
	mutex_lock(&mvm->mutex);

2263 2264 2265 2266 2267 2268 2269
	/* Newest FW fixes sched scan while connected on another interface */
	if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
		if (!vif->bss_conf.idle) {
			ret = -EBUSY;
			goto out;
		}
	} else if (!iwl_mvm_is_idle(mvm)) {
2270 2271 2272 2273
		ret = -EBUSY;
		goto out;
	}

2274
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2275 2276 2277 2278
		ret = -EBUSY;
		goto out;
	}

2279
	ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2280
	if (ret)
2281
		mvm->scan_status = IWL_MVM_SCAN_NONE;
2282

2283 2284 2285 2286 2287
out:
	mutex_unlock(&mvm->mutex);
	return ret;
}

2288 2289
static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
2290 2291
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2292
	int ret;
2293 2294

	mutex_lock(&mvm->mutex);
2295
	ret = iwl_mvm_scan_offload_stop(mvm, false);
2296
	mutex_unlock(&mvm->mutex);
2297
	iwl_mvm_wait_for_async_handlers(mvm);
2298

2299
	return ret;
2300

2301 2302
}

J
Johannes Berg 已提交
2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335
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);
	int ret;

	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;
		/* fall-through */
	case WLAN_CIPHER_SUITE_CCMP:
		key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
		break;
	case WLAN_CIPHER_SUITE_AES_CMAC:
		WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
		break;
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
		/*
		 * Support for TX only, at least for now, so accept
		 * the key and do nothing else. Then mac80211 will
		 * pass it for TX but we don't have to use it for RX.
		 */
		return 0;
	default:
2336 2337 2338 2339 2340 2341
		/* 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
2342 2343 2344 2345 2346 2347
	}

	mutex_lock(&mvm->mutex);

	switch (cmd) {
	case SET_KEY:
J
Johannes Berg 已提交
2348 2349 2350 2351 2352 2353 2354
		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.
			 */
2355 2356 2357 2358 2359
			ret = 0;
			key->hw_key_idx = STA_KEY_IDX_INVALID;
			break;
		}

J
Johannes Berg 已提交
2360 2361 2362 2363 2364 2365 2366 2367
		IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
		ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
		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
			 */
2368
			key->hw_key_idx = STA_KEY_IDX_INVALID;
J
Johannes Berg 已提交
2369 2370 2371 2372 2373
			ret = 0;
		}

		break;
	case DISABLE_KEY:
2374 2375 2376 2377 2378
		if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
			ret = 0;
			break;
		}

J
Johannes Berg 已提交
2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397
		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
2398 2399 2400
	if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
		return;

J
Johannes Berg 已提交
2401 2402 2403 2404
	iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
}


2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469
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;
}

#define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
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;
	static const u8 time_event_response[] = { HOT_SPOT_CMD };
	struct iwl_notification_wait wait_time_event;
	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)),
		.apply_time_max_delay =
			cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
		.duration = cpu_to_le32(MSEC_TO_TU(duration)),
	 };

	/* Set the node address */
	memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);

2470 2471 2472 2473 2474 2475 2476 2477 2478
	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;
	}

2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522
	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
2523 2524 2525
static int iwl_mvm_roc(struct ieee80211_hw *hw,
		       struct ieee80211_vif *vif,
		       struct ieee80211_channel *channel,
2526 2527
		       int duration,
		       enum ieee80211_roc_type type)
J
Johannes Berg 已提交
2528 2529
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2530
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2531
	struct cfg80211_chan_def chandef;
2532 2533 2534 2535 2536
	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
2537

2538 2539
	mutex_lock(&mvm->mutex);

2540 2541 2542 2543 2544
	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
		/* Use aux roc framework (HS20) */
		ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
					       vif, duration);
2545
		goto out_unlock;
2546 2547 2548 2549 2550
	case NL80211_IFTYPE_P2P_DEVICE:
		/* handle below */
		break;
	default:
		IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2551 2552
		ret = -EINVAL;
		goto out_unlock;
J
Johannes Berg 已提交
2553 2554
	}

2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586
	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
2587 2588
	cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);

2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634
	/*
	 * 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
2635
	/* Schedule the time events */
2636
	ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
J
Johannes Berg 已提交
2637

2638
out_unlock:
J
Johannes Berg 已提交
2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657
	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);
	iwl_mvm_stop_p2p_roc(mvm);
	mutex_unlock(&mvm->mutex);

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

2658 2659
static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
				 struct ieee80211_chanctx_conf *ctx)
J
Johannes Berg 已提交
2660
{
2661 2662
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt;
J
Johannes Berg 已提交
2663 2664
	int ret;

2665 2666
	lockdep_assert_held(&mvm->mutex);

2667
	IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2668 2669 2670 2671 2672 2673

	phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
	if (!phy_ctxt) {
		ret = -ENOSPC;
		goto out;
	}
J
Johannes Berg 已提交
2674

2675
	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2676 2677
				       ctx->rx_chains_static,
				       ctx->rx_chains_dynamic);
2678 2679 2680 2681 2682
	if (ret) {
		IWL_ERR(mvm, "Failed to add PHY context\n");
		goto out;
	}

2683
	iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2684 2685
	*phy_ctxt_id = phy_ctxt->id;
out:
2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696
	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
2697
	mutex_unlock(&mvm->mutex);
2698

J
Johannes Berg 已提交
2699 2700 2701
	return ret;
}

2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712
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
2713 2714 2715 2716 2717 2718
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);
2719
	__iwl_mvm_remove_chanctx(mvm, ctx);
J
Johannes Berg 已提交
2720 2721 2722 2723 2724 2725 2726 2727
	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);
2728 2729
	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
2730

2731 2732 2733
	if (WARN_ONCE((phy_ctxt->ref > 1) &&
		      (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
				   IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2734 2735
				   IEEE80211_CHANCTX_CHANGE_RADAR |
				   IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2736 2737 2738 2739
		      "Cannot change PHY. Ref=%d, changed=0x%X\n",
		      phy_ctxt->ref, changed))
		return;

J
Johannes Berg 已提交
2740
	mutex_lock(&mvm->mutex);
2741
	iwl_mvm_bt_coex_vif_change(mvm);
2742
	iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
J
Johannes Berg 已提交
2743 2744 2745 2746 2747
				 ctx->rx_chains_static,
				 ctx->rx_chains_dynamic);
	mutex_unlock(&mvm->mutex);
}

2748 2749
static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif,
2750 2751
					struct ieee80211_chanctx_conf *ctx,
					bool switching_chanctx)
J
Johannes Berg 已提交
2752
{
2753 2754
	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
2755 2756 2757
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

2758
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
2759

2760
	mvmvif->phy_ctxt = phy_ctxt;
J
Johannes Berg 已提交
2761 2762 2763

	switch (vif->type) {
	case NL80211_IFTYPE_AP:
2764 2765 2766 2767 2768
		/* Unless it's a CSA flow we have nothing to do here */
		if (vif->csa_active) {
			mvmvif->ap_ibss_active = true;
			break;
		}
J
Johannes Berg 已提交
2769
	case NL80211_IFTYPE_ADHOC:
J
Johannes Berg 已提交
2770 2771
		/*
		 * The AP binding flow is handled as part of the start_ap flow
J
Johannes Berg 已提交
2772
		 * (in bss_info_changed), similarly for IBSS.
J
Johannes Berg 已提交
2773 2774
		 */
		ret = 0;
2775
		goto out;
J
Johannes Berg 已提交
2776
	case NL80211_IFTYPE_STATION:
2777
		break;
J
Johannes Berg 已提交
2778
	case NL80211_IFTYPE_MONITOR:
2779 2780
		/* always disable PS when a monitor interface is active */
		mvmvif->ps_disabled = true;
J
Johannes Berg 已提交
2781 2782 2783
		break;
	default:
		ret = -EINVAL;
2784
		goto out;
J
Johannes Berg 已提交
2785 2786 2787 2788
	}

	ret = iwl_mvm_binding_add_vif(mvm, vif);
	if (ret)
2789
		goto out;
J
Johannes Berg 已提交
2790 2791

	/*
2792 2793 2794
	 * Power state must be updated before quotas,
	 * otherwise fw will complain.
	 */
2795
	iwl_mvm_power_update_mac(mvm);
2796 2797

	/* Setting the quota at this stage is only required for monitor
J
Johannes Berg 已提交
2798 2799 2800 2801
	 * interfaces. For the other types, the bss_info changed flow
	 * will handle quota settings.
	 */
	if (vif->type == NL80211_IFTYPE_MONITOR) {
2802
		mvmvif->monitor_active = true;
2803
		ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
2804 2805 2806 2807
		if (ret)
			goto out_remove_binding;
	}

2808
	/* Handle binding during CSA */
2809 2810
	if ((vif->type == NL80211_IFTYPE_AP) ||
	    (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2811
		iwl_mvm_update_quotas(mvm, NULL);
2812
		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2813 2814
	}

2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827
	if (vif->csa_active && 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))
			goto out;

		/* TODO: only re-enable after the first beacon */
		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
	}

2828
	goto out;
J
Johannes Berg 已提交
2829

2830
out_remove_binding:
J
Johannes Berg 已提交
2831
	iwl_mvm_binding_remove_vif(mvm, vif);
2832
	iwl_mvm_power_update_mac(mvm);
2833
out:
J
Johannes Berg 已提交
2834 2835 2836 2837
	if (ret)
		mvmvif->phy_ctxt = NULL;
	return ret;
}
2838 2839 2840
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
2841 2842
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2843
	int ret;
J
Johannes Berg 已提交
2844 2845

	mutex_lock(&mvm->mutex);
2846
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2847 2848 2849 2850 2851 2852 2853
	mutex_unlock(&mvm->mutex);

	return ret;
}

static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
					   struct ieee80211_vif *vif,
2854 2855
					   struct ieee80211_chanctx_conf *ctx,
					   bool switching_chanctx)
2856 2857
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2858
	struct ieee80211_vif *disabled_vif = NULL;
2859
	struct iwl_mvm_sta *mvmsta;
2860 2861

	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
2862 2863 2864 2865

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

	switch (vif->type) {
J
Johannes Berg 已提交
2866
	case NL80211_IFTYPE_ADHOC:
2867
		goto out;
J
Johannes Berg 已提交
2868
	case NL80211_IFTYPE_MONITOR:
2869
		mvmvif->monitor_active = false;
2870
		mvmvif->ps_disabled = false;
J
Johannes Berg 已提交
2871
		break;
2872 2873 2874
	case NL80211_IFTYPE_AP:
		/* This part is triggered only during CSA */
		if (!vif->csa_active || !mvmvif->ap_ibss_active)
2875
			goto out;
2876

2877 2878 2879 2880 2881 2882
		/* 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);

2883
		mvmvif->ap_ibss_active = false;
2884 2885 2886 2887 2888 2889 2890
		break;
	case NL80211_IFTYPE_STATION:
		if (!switching_chanctx)
			break;

		disabled_vif = vif;

2891 2892 2893 2894 2895 2896
		mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
							  mvmvif->ap_sta_id);

		if (!WARN_ON(!mvmsta))
			iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, true);

2897
		iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2898
		break;
J
Johannes Berg 已提交
2899 2900 2901 2902
	default:
		break;
	}

2903
	iwl_mvm_update_quotas(mvm, disabled_vif);
2904
	iwl_mvm_binding_remove_vif(mvm, vif);
2905

2906
out:
2907
	mvmvif->phy_ctxt = NULL;
2908
	iwl_mvm_power_update_mac(mvm);
2909 2910 2911 2912 2913 2914 2915 2916 2917
}

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);
2918
	__iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
J
Johannes Berg 已提交
2919 2920 2921
	mutex_unlock(&mvm->mutex);
}

2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934
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 SWAP_CONTEXTS and with a single-vif right now */
	if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
		return -EOPNOTSUPP;

	mutex_lock(&mvm->mutex);
2935
	__iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2936 2937 2938 2939 2940 2941 2942 2943
	__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;
	}

2944 2945
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
					   true);
2946 2947 2948 2949 2950 2951
	if (ret) {
		IWL_ERR(mvm,
			"failed to assign new_ctx during channel switch\n");
		goto out_remove;
	}

2952 2953 2954 2955
	/* 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);

2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967
	goto out;

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

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

2968 2969
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
					   true);
2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985
	if (ret) {
		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;
}

J
Johannes Berg 已提交
2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000
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);
	struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;

	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);
}

3001 3002 3003 3004
#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 },
3005
	[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
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
};

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;

3037
		return iwl_mvm_update_quotas(mvm, NULL);
3038 3039 3040 3041 3042 3043 3044 3045
	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
3046 3047
			return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
		return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067
	}

	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

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static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
					  struct ieee80211_vif *vif,
					  struct cfg80211_chan_def *chandef)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
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	struct ieee80211_vif *csa_vif;
3074 3075

	mutex_lock(&mvm->mutex);
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	csa_vif = rcu_dereference_protected(mvm->csa_vif,
					    lockdep_is_held(&mvm->mutex));
	if (WARN(csa_vif && csa_vif->csa_active,
3080 3081 3082 3083 3084
		 "Another CSA is already in progress"))
		goto out_unlock;

	IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
			   chandef->center_freq1);
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	rcu_assign_pointer(mvm->csa_vif, vif);
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out_unlock:
	mutex_unlock(&mvm->mutex);
}

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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;

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

	mutex_lock(&mvm->mutex);
	mvmvif = iwl_mvm_vif_from_mac80211(vif);
	mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);

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	if (WARN_ON_ONCE(!mvmsta)) {
		mutex_unlock(&mvm->mutex);
		return;
	}
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	if (drop) {
		if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
			IWL_ERR(mvm, "flush request fail\n");
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		mutex_unlock(&mvm->mutex);
3114
	} else {
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		u32 tfd_queue_msk = mvmsta->tfd_queue_msk;
		mutex_unlock(&mvm->mutex);

		/* 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, tfd_queue_msk);
3122 3123 3124
	}
}

3125
const struct ieee80211_ops iwl_mvm_hw_ops = {
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	.tx = iwl_mvm_mac_tx,
	.ampdu_action = iwl_mvm_mac_ampdu_action,
	.start = iwl_mvm_mac_start,
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	.reconfig_complete = iwl_mvm_mac_reconfig_complete,
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	.stop = iwl_mvm_mac_stop,
	.add_interface = iwl_mvm_mac_add_interface,
	.remove_interface = iwl_mvm_mac_remove_interface,
	.config = iwl_mvm_mac_config,
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	.prepare_multicast = iwl_mvm_prepare_multicast,
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	.configure_filter = iwl_mvm_configure_filter,
	.bss_info_changed = iwl_mvm_bss_info_changed,
	.hw_scan = iwl_mvm_mac_hw_scan,
	.cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3139
	.sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
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	.sta_state = iwl_mvm_mac_sta_state,
	.sta_notify = iwl_mvm_mac_sta_notify,
	.allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3143
	.release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
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	.set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3145
	.sta_rc_update = iwl_mvm_sta_rc_update,
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	.conf_tx = iwl_mvm_mac_conf_tx,
	.mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3148
	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3149
	.flush = iwl_mvm_mac_flush,
3150 3151
	.sched_scan_start = iwl_mvm_mac_sched_scan_start,
	.sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
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	.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,
3161
	.switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
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	.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,
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	.set_tim = iwl_mvm_set_tim,

3170 3171
	.channel_switch_beacon = iwl_mvm_channel_switch_beacon,

3172 3173
	CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)

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#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
};