mac80211.c 82.7 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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 *
 * 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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 * 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 <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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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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static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
{
	/* we create the 802.11 header and SSID element */
	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
		return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
	return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
}

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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 |
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		    IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
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		    IEEE80211_HW_SUPPORTS_STATIC_SMPS;
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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;
		hw->uapsd_queues = IWL_UAPSD_AC_INFO;
		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)
		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);

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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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	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;
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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);
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	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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	if (iwl_mvm_is_radio_killed(mvm)) {
		IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
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		goto drop;
	}

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

518 519 520 521 522 523 524 525 526
	/* 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) {
527 528
		if (iwl_mvm_defer_tx(mvm, sta, skb))
			return;
529
		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);
}

541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558
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;
567
	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;

575
	/* return from D0i3 before starting a new Tx aggregation */
576 577 578 579 580 581
	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:
582
		/*
583 584 585 586 587 588
		 * 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.
589
		 */
590 591 592 593 594
		ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
		if (ret)
			return ret;

		tx_agg_ref = true;
595 596 597
		break;
	default:
		break;
598 599
	}

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	mutex_lock(&mvm->mutex);

	switch (action) {
	case IEEE80211_AMPDU_RX_START:
604
		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:
614
		if (!iwl_enable_tx_ampdu(mvm->cfg)) {
615 616 617
			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:
621 622
		ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
		break;
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623 624
	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
625
		ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
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626 627 628 629 630 631 632 633 634 635 636
		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);

637 638 639 640 641 642 643
	/*
	 * 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);

663
	mvmvif->phy_ctxt = NULL;
664
	memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
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665 666
}

667 668 669 670 671 672
#ifdef CONFIG_IWLWIFI_DEBUGFS
static void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
{
	struct iwl_fw_error_dump_file *dump_file;
	struct iwl_fw_error_dump_data *dump_data;
	struct iwl_fw_error_dump_info *dump_info;
673
	struct iwl_mvm_dump_ptrs *fw_error_dump;
674 675 676 677 678 679 680 681 682 683 684
	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);

	if (mvm->fw_error_dump)
		return;

685 686 687 688
	fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
	if (!fw_error_dump)
		return;

689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
	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);

706
	dump_file = vzalloc(file_len);
707 708
	if (!dump_file) {
		kfree(fw_error_dump);
709
		return;
710
	}
711

712
	fw_error_dump->op_mode_ptr = dump_file;
713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754

	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);

755 756 757 758 759 760
	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);
	mvm->fw_error_dump = fw_error_dump;
761 762 763
}
#endif

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764 765
static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
{
766 767 768 769 770 771 772 773 774
#ifdef CONFIG_IWLWIFI_DEBUGFS
	static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };

	iwl_mvm_fw_error_dump(mvm);

	/* notify the userspace about the error we had */
	kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
#endif

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775 776 777 778 779 780 781 782 783 784 785
	iwl_trans_stop_device(mvm->trans);

	mvm->scan_status = IWL_MVM_SCAN_NONE;

	/* 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);

786
	mvm->p2p_device_vif = NULL;
787
	mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
788 789

	iwl_mvm_reset_phy_ctxts(mvm);
J
Johannes Berg 已提交
790 791
	memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
	memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
792 793 794 795 796 797
	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
798 799 800

	ieee80211_wake_queues(mvm->hw);

801 802 803 804
	/* cleanup all stale references (scan, roc), but keep the
	 * ucode_down ref until reconfig is complete */
	iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);

J
Johannes Berg 已提交
805
	mvm->vif_count = 0;
806
	mvm->rx_ba_sessions = 0;
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807 808 809 810 811 812 813 814 815 816 817 818 819 820
}

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);

	/* 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);
821 822 823 824 825 826 827 828 829 830

	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);
	}

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Johannes Berg 已提交
831 832 833 834 835 836 837 838 839 840 841 842 843
	mutex_unlock(&mvm->mutex);

	return ret;
}

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

	mutex_lock(&mvm->mutex);

	clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
844
	iwl_mvm_d0i3_enable_tx(mvm, NULL);
845
	ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
846 847 848 849
	if (ret)
		IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
			ret);

850 851 852
	/* allow transport/FW low power modes */
	iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);

J
Johannes Berg 已提交
853 854 855 856 857 858 859
	mutex_unlock(&mvm->mutex);
}

static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

860
	flush_work(&mvm->d0i3_exit_work);
J
Johannes Berg 已提交
861 862 863
	flush_work(&mvm->async_handlers_wk);

	mutex_lock(&mvm->mutex);
864 865 866 867

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

J
Johannes Berg 已提交
868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892
	/* 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 */
	iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);

	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);
}

893 894 895 896 897 898 899 900 901 902 903 904 905 906
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;
}

907 908 909 910 911 912 913 914 915
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
916
	return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
917 918 919 920
				    sizeof(reduce_txpwr_cmd),
				    &reduce_txpwr_cmd);
}

J
Johannes Berg 已提交
921 922 923 924 925 926 927
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;

928 929 930 931 932 933 934 935 936
	/*
	 * 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
937 938 939 940 941 942 943 944
	/*
	 * 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);

945
	/* Allocate resources for the MAC context, and add it to the fw  */
J
Johannes Berg 已提交
946 947 948 949
	ret = iwl_mvm_mac_ctxt_init(mvm, vif);
	if (ret)
		goto out_unlock;

950
	/* Counting number of interfaces is needed for legacy PM */
951 952 953
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count++;

J
Johannes Berg 已提交
954 955 956 957 958 959 960 961 962 963 964
	/*
	 * 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
965 966
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
J
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967 968
		u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
		ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
969 970
					       qmask,
					       ieee80211_vif_type_p2p(vif));
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Johannes Berg 已提交
971 972 973 974 975
		if (ret) {
			IWL_ERR(mvm, "Failed to allocate bcast sta\n");
			goto out_release;
		}

976
		iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
977 978 979 980 981 982 983
		goto out_unlock;
	}

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

984
	ret = iwl_mvm_power_update_mac(mvm);
985 986
	if (ret)
		goto out_release;
J
Johannes Berg 已提交
987

988
	/* beacon filtering */
E
Emmanuel Grumbach 已提交
989
	ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
990 991 992
	if (ret)
		goto out_remove_mac;

993
	if (!mvm->bf_allowed_vif &&
994
	    vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
995
		mvm->bf_allowed_vif = mvmvif;
996 997
		vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
				     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
998 999
	}

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Johannes Berg 已提交
1000 1001 1002 1003 1004 1005 1006
	/*
	 * 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) {

1007 1008 1009
		mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
		if (!mvmvif->phy_ctxt) {
			ret = -ENOSPC;
1010
			goto out_free_bf;
1011
		}
J
Johannes Berg 已提交
1012

1013
		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
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1014 1015
		ret = iwl_mvm_binding_add_vif(mvm, vif);
		if (ret)
1016
			goto out_unref_phy;
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Johannes Berg 已提交
1017 1018 1019 1020 1021 1022 1023 1024 1025 1026

		ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
		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;
	}

1027
	iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1028 1029 1030 1031
	goto out_unlock;

 out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
1032
 out_unref_phy:
1033
	iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1034 1035 1036
 out_free_bf:
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1037 1038
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1039
	}
J
Johannes Berg 已提交
1040 1041 1042 1043
 out_remove_mac:
	mvmvif->phy_ctxt = NULL;
	iwl_mvm_mac_ctxt_remove(mvm, vif);
 out_release:
1044 1045
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count--;
1046

J
Johannes Berg 已提交
1047 1048 1049 1050
	iwl_mvm_mac_ctxt_release(mvm, vif);
 out_unlock:
	mutex_unlock(&mvm->mutex);

1051 1052
	iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);

J
Johannes Berg 已提交
1053 1054 1055
	return ret;
}

1056 1057
static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085
{
	u32 tfd_msk = 0, ac;

	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
		if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
			tfd_msk |= BIT(vif->hw_queue[ac]);

	if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
		tfd_msk |= BIT(vif->cab_queue);

	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
1086
		 * triggered. Flush it.
J
Johannes Berg 已提交
1087 1088 1089
		 */
		flush_work(&mvm->sta_drained_wk);
	}
1090 1091 1092 1093 1094 1095 1096 1097 1098
}

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
1099 1100 1101

	mutex_lock(&mvm->mutex);

1102 1103
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1104 1105
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1106 1107
	}

1108 1109
	iwl_mvm_vif_dbgfs_clean(mvm, vif);

J
Johannes Berg 已提交
1110 1111
	/*
	 * For AP/GO interface, the tear down of the resources allocated to the
1112
	 * interface is be handled as part of the stop_ap flow.
J
Johannes Berg 已提交
1113
	 */
J
Johannes Berg 已提交
1114 1115
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1116 1117 1118 1119 1120 1121
#ifdef CONFIG_NL80211_TESTMODE
		if (vif == mvm->noa_vif) {
			mvm->noa_vif = NULL;
			mvm->noa_duration = 0;
		}
#endif
J
Johannes Berg 已提交
1122 1123 1124 1125 1126 1127 1128 1129
		iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
		goto out_release;
	}

	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		mvm->p2p_device_vif = NULL;
		iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
		iwl_mvm_binding_remove_vif(mvm, vif);
1130
		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1131 1132 1133
		mvmvif->phy_ctxt = NULL;
	}

1134
	if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
J
Johannes Berg 已提交
1135
		mvm->vif_count--;
1136

1137
	iwl_mvm_power_update_mac(mvm);
J
Johannes Berg 已提交
1138 1139 1140 1141 1142 1143 1144 1145
	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)
1146
{
J
Johannes Berg 已提交
1147 1148 1149
	return 0;
}

1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174
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);

1175
	ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1176 1177 1178 1179 1180 1181 1182 1183
	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,
1184 1185
	};

1186 1187 1188 1189 1190
	lockdep_assert_held(&mvm->mutex);

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

1191
	ieee80211_iterate_active_interfaces_atomic(
1192 1193
		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
		iwl_mvm_mc_iface_iterator, &iter_data);
1194 1195
}

1196 1197
static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
				     struct netdev_hw_addr_list *mc_list)
J
Johannes Berg 已提交
1198
{
1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mcast_filter_cmd *cmd;
	struct netdev_hw_addr *addr;
	int addr_count = netdev_hw_addr_list_count(mc_list);
	bool pass_all = false;
	int len;

	if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
		pass_all = true;
		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;
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Johannes Berg 已提交
1230 1231 1232 1233 1234 1235 1236
}

static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
				     unsigned int changed_flags,
				     unsigned int *total_flags,
				     u64 multicast)
{
1237 1238
	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
1239

1240
	mutex_lock(&mvm->mutex);
1241

1242 1243 1244
	/* replace previous configuration */
	kfree(mvm->mcast_filter_cmd);
	mvm->mcast_filter_cmd = cmd;
1245

1246 1247
	if (!cmd)
		goto out;
1248

1249 1250 1251 1252
	iwl_mvm_recalc_multicast(mvm);
out:
	mutex_unlock(&mvm->mutex);
	*total_flags = 0;
1253 1254
}

1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277
#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;

1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293
		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;
1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312
		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];

1313 1314 1315 1316 1317 1318
	/*
	 * enable filtering only for associated stations, but not for P2P
	 * Clients
	 */
	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
	    !vif->bss_conf.assoc)
1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352
		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++;
	}
}

1353 1354
bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
				    struct iwl_bcast_filter_cmd *cmd)
1355 1356 1357
{
	struct iwl_bcast_iter_data iter_data = {
		.mvm = mvm,
1358
		.cmd = cmd,
1359 1360
	};

1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374
	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
1375 1376 1377

	/* if no filters are configured, do nothing */
	if (!mvm->bcast_filters)
1378
		return false;
1379 1380 1381 1382 1383 1384

	/* 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);

1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397
	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
1398
	return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1399 1400 1401 1402 1403 1404 1405 1406 1407 1408
				    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
1409 1410 1411 1412 1413 1414 1415 1416
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;

1417 1418 1419 1420 1421 1422 1423 1424
	/*
	 * 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);

1425
	ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
J
Johannes Berg 已提交
1426 1427 1428 1429 1430 1431
	if (ret)
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);

	if (changes & BSS_CHANGED_ASSOC) {
		if (bss_conf->assoc) {
			/* add quota for this interface */
1432
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1433 1434 1435 1436
			if (ret) {
				IWL_ERR(mvm, "failed to update quotas\n");
				return;
			}
1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457

			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,
							5 * dur);
			}
1458 1459

			iwl_mvm_sf_update(mvm, vif, false);
1460
			iwl_mvm_power_vif_assoc(mvm, vif);
1461 1462
			if (vif->p2p)
				iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
J
Johannes Berg 已提交
1463
		} else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1464 1465 1466 1467 1468 1469 1470
			/*
			 * 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
1471 1472 1473 1474
			/* 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");
1475 1476 1477

			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
1478 1479
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
			/* remove quota for this interface */
1480
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1481 1482
			if (ret)
				IWL_ERR(mvm, "failed to update quotas\n");
1483 1484 1485

			if (vif->p2p)
				iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
J
Johannes Berg 已提交
1486
		}
1487

1488
		iwl_mvm_recalc_multicast(mvm);
1489
		iwl_mvm_configure_bcast_filter(mvm, vif);
1490

1491 1492 1493
		/* reset rssi values */
		mvmvif->bf_data.ave_beacon_signal = 0;

1494
		iwl_mvm_bt_coex_vif_change(mvm);
1495 1496
		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
				    IEEE80211_SMPS_AUTOMATIC);
1497
	} else if (changes & BSS_CHANGED_BEACON_INFO) {
1498 1499 1500 1501 1502 1503
		/*
		 * We received a beacon _after_ association so
		 * remove the session protection.
		 */
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
1504 1505
	} else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
			      BSS_CHANGED_QOS)) {
1506
		ret = iwl_mvm_power_update_mac(mvm);
1507 1508
		if (ret)
			IWL_ERR(mvm, "failed to update power mode\n");
J
Johannes Berg 已提交
1509
	}
1510 1511 1512 1513 1514 1515

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

1516 1517 1518 1519 1520
	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);
	}
1521 1522

	if (changes & BSS_CHANGED_CQM) {
1523
		IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1524 1525
		/* reset cqm events tracking */
		mvmvif->bf_data.last_cqm_event = 0;
1526 1527 1528 1529 1530 1531
		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");
		}
1532
	}
1533 1534

	if (changes & BSS_CHANGED_ARP_FILTER) {
1535
		IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1536 1537
		iwl_mvm_configure_bcast_filter(mvm, vif);
	}
J
Johannes Berg 已提交
1538 1539
}

J
Johannes Berg 已提交
1540 1541
static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1542 1543 1544 1545 1546
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

1547 1548 1549 1550 1551 1552 1553 1554
	/*
	 * iwl_mvm_mac_ctxt_add() might read directly from the device
	 * (the system time), so make sure it is available.
	 */
	ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
	if (ret)
		return ret;

J
Johannes Berg 已提交
1555 1556 1557 1558 1559 1560 1561
	mutex_lock(&mvm->mutex);

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

1562 1563 1564 1565 1566 1567 1568
	/*
	 * 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
1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584
	/* 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 */
	ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
	if (ret)
		goto out_unbind;

1585 1586 1587
	/* must be set before quota calculations */
	mvmvif->ap_ibss_active = true;

1588
	/* power updated needs to be done before quotas */
1589
	iwl_mvm_power_update_mac(mvm);
1590

1591
	ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1592
	if (ret)
1593
		goto out_quota_failed;
J
Johannes Berg 已提交
1594

J
Johannes Berg 已提交
1595
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
1596
	if (vif->p2p && mvm->p2p_device_vif)
1597
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
J
Johannes Berg 已提交
1598

1599 1600
	iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);

1601
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
1602

J
Johannes Berg 已提交
1603 1604 1605
	mutex_unlock(&mvm->mutex);
	return 0;

1606
out_quota_failed:
1607
	iwl_mvm_power_update_mac(mvm);
1608
	mvmvif->ap_ibss_active = false;
J
Johannes Berg 已提交
1609 1610 1611 1612 1613 1614 1615
	iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
out_remove:
	iwl_mvm_mac_ctxt_remove(mvm, vif);
out_unlock:
	mutex_unlock(&mvm->mutex);
1616
	iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
J
Johannes Berg 已提交
1617 1618 1619
	return ret;
}

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1620 1621
static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
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1622 1623 1624 1625
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

1626 1627
	iwl_mvm_prepare_mac_removal(mvm, vif);

J
Johannes Berg 已提交
1628 1629
	mutex_lock(&mvm->mutex);

1630
	/* Handle AP stop while in CSA */
1631 1632 1633
	if (rcu_access_pointer(mvm->csa_vif) == vif) {
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
1634
		RCU_INIT_POINTER(mvm->csa_vif, NULL);
1635
	}
1636

1637 1638 1639 1640 1641
	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
1642
	mvmvif->ap_ibss_active = false;
1643
	mvm->ap_last_beacon_gp2 = 0;
J
Johannes Berg 已提交
1644

1645
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
1646

1647 1648
	iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);

J
Johannes Berg 已提交
1649
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
1650
	if (vif->p2p && mvm->p2p_device_vif)
1651
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
J
Johannes Berg 已提交
1652

1653
	iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1654 1655
	iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
	iwl_mvm_binding_remove_vif(mvm, vif);
1656

1657
	iwl_mvm_power_update_mac(mvm);
1658

J
Johannes Berg 已提交
1659 1660 1661 1662 1663
	iwl_mvm_mac_ctxt_remove(mvm, vif);

	mutex_unlock(&mvm->mutex);
}

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1664 1665 1666 1667 1668
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
1669
{
1670
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1671

1672 1673 1674 1675
	/* Changes will be applied when the AP/IBSS is started */
	if (!mvmvif->ap_ibss_active)
		return;

1676 1677
	if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
		       BSS_CHANGED_BANDWIDTH) &&
1678
	    iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1679
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1680

J
Johannes Berg 已提交
1681
	/* Need to send a new beacon template to the FW */
1682 1683 1684
	if (changes & BSS_CHANGED_BEACON &&
	    iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
		IWL_WARN(mvm, "Failed updating beacon data\n");
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1685 1686 1687 1688 1689 1690 1691 1692 1693
}

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);

1694 1695 1696 1697 1698 1699 1700 1701
	/*
	 * 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
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1702 1703
	mutex_lock(&mvm->mutex);

1704
	if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1705
		iwl_mvm_scan_offload_stop(mvm, true);
1706

J
Johannes Berg 已提交
1707 1708 1709 1710 1711
	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
1712 1713
	case NL80211_IFTYPE_ADHOC:
		iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
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Johannes Berg 已提交
1714 1715 1716 1717 1718 1719 1720
		break;
	default:
		/* shouldn't happen */
		WARN_ON_ONCE(1);
	}

	mutex_unlock(&mvm->mutex);
1721
	iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
J
Johannes Berg 已提交
1722 1723
}

1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764
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;
}
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1765 1766
static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
1767
			       struct ieee80211_scan_request *hw_req)
J
Johannes Berg 已提交
1768 1769
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1770
	struct cfg80211_scan_request *req = &hw_req->req;
J
Johannes Berg 已提交
1771 1772
	int ret;

1773 1774
	if (req->n_channels == 0 ||
	    req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
J
Johannes Berg 已提交
1775 1776
		return -EINVAL;

1777 1778 1779 1780
	ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
	if (ret)
		return ret;

J
Johannes Berg 已提交
1781 1782
	mutex_lock(&mvm->mutex);

1783
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
J
Johannes Berg 已提交
1784
		ret = -EBUSY;
1785 1786
		goto out;
	}
J
Johannes Berg 已提交
1787

1788 1789
	iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);

1790 1791 1792 1793 1794
	if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
		ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
	else
		ret = iwl_mvm_scan_request(mvm, vif, req);

1795 1796 1797
	if (ret)
		iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
out:
J
Johannes Berg 已提交
1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815
	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,
1816
				  struct ieee80211_sta *sta, u16 tids,
J
Johannes Berg 已提交
1817 1818 1819 1820 1821 1822
				  int num_frames,
				  enum ieee80211_frame_release_type reason,
				  bool more_data)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

1823
	/* Called when we need to transmit (a) frame(s) from mac80211 */
J
Johannes Berg 已提交
1824

1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841
	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
1842 1843 1844 1845 1846 1847 1848 1849
}

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);
1850
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1851
	int tid;
J
Johannes Berg 已提交
1852 1853 1854

	switch (cmd) {
	case STA_NOTIFY_SLEEP:
1855
		if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
J
Johannes Berg 已提交
1856
			ieee80211_sta_block_awake(hw, sta, true);
1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869
		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
1870 1871 1872 1873 1874 1875 1876
		/*
		 * 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:
1877
		if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
J
Johannes Berg 已提交
1878
			break;
1879
		iwl_mvm_sta_modify_ps_wake(mvm, sta);
J
Johannes Berg 已提交
1880 1881 1882 1883 1884 1885
		break;
	default:
		break;
	}
}

1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907
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);
}

1908
int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1909 1910
{
	struct ieee80211_sta *sta;
1911
	struct iwl_mvm_sta *mvmsta;
1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922
	int count = 0;
	int i;

	lockdep_assert_held(&mvm->mutex);

	for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
						lockdep_is_held(&mvm->mutex));
		if (!sta || IS_ERR(sta) || !sta->tdls)
			continue;

1923 1924 1925 1926 1927 1928
		if (vif) {
			mvmsta = iwl_mvm_sta_from_mac80211(sta);
			if (mvmsta->vif != vif)
				continue;
		}

1929 1930 1931 1932 1933 1934
		count++;
	}

	return count;
}

1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
static void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm,
				      struct ieee80211_vif *vif,
				      bool sta_added)
{
	int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);

	/*
	 * Disable ps when the first TDLS sta is added and re-enable it
	 * when the last TDLS sta is removed
	 */
	if ((tdls_sta_cnt == 1 && sta_added) ||
	    (tdls_sta_cnt == 0 && !sta_added))
		iwl_mvm_power_update_mac(mvm);
}

1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971
static void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
{
	struct ieee80211_sta *sta;
	struct iwl_mvm_sta *mvmsta;
	int i;

	lockdep_assert_held(&mvm->mutex);

	for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
						lockdep_is_held(&mvm->mutex));
		if (!sta || IS_ERR(sta) || !sta->tdls)
			continue;

		mvmsta = iwl_mvm_sta_from_mac80211(sta);
		ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
				NL80211_TDLS_TEARDOWN,
				WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
				GFP_KERNEL);
	}
}

J
Johannes Berg 已提交
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994
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) {
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
		/*
		 * 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;
		}
2010 2011 2012

		if (sta->tdls &&
		    (vif->p2p ||
2013 2014
		     iwl_mvm_tdls_sta_count(mvm, NULL) ==
						IWL_MVM_TDLS_STA_COUNT ||
2015 2016 2017 2018 2019 2020
		     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
2021
		ret = iwl_mvm_add_sta(mvm, vif, sta);
2022 2023
		if (sta->tdls && ret == 0)
			iwl_mvm_recalc_tdls_state(mvm, vif, true);
J
Johannes Berg 已提交
2024 2025
	} else if (old_state == IEEE80211_STA_NONE &&
		   new_state == IEEE80211_STA_AUTH) {
2026 2027 2028 2029 2030
		/*
		 * 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
2031 2032 2033
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_ASSOC) {
2034 2035 2036
		ret = iwl_mvm_update_sta(mvm, vif, sta);
		if (ret == 0)
			iwl_mvm_rs_rate_init(mvm, sta,
2037 2038
					     mvmvif->phy_ctxt->channel->band,
					     true);
J
Johannes Berg 已提交
2039 2040
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTHORIZED) {
2041 2042 2043 2044 2045

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

2046
		/* enable beacon filtering */
2047
		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2048 2049 2050
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTHORIZED &&
		   new_state == IEEE80211_STA_ASSOC) {
2051
		/* disable beacon filtering */
E
Emmanuel Grumbach 已提交
2052
		WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2053 2054 2055 2056 2057 2058 2059 2060 2061 2062
		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);
2063 2064
		if (sta->tdls)
			iwl_mvm_recalc_tdls_state(mvm, vif, false);
J
Johannes Berg 已提交
2065 2066 2067
	} else {
		ret = -EIO;
	}
2068
 out_unlock:
J
Johannes Berg 已提交
2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082
	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;
}

2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093
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
2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110
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);
2111
		ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
J
Johannes Berg 已提交
2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129
		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;

2130 2131 2132 2133 2134 2135 2136
	/*
	 * 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
2137 2138
	mutex_lock(&mvm->mutex);
	/* Try really hard to protect the session and hear a beacon */
2139
	iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
J
Johannes Berg 已提交
2140
	mutex_unlock(&mvm->mutex);
2141 2142

	iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
J
Johannes Berg 已提交
2143 2144
}

2145 2146 2147 2148 2149 2150
static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
						  struct ieee80211_vif *vif)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;

2151 2152 2153 2154 2155 2156 2157
	/*
	 * 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_PROTECT_TDLS))
		return;

2158 2159 2160 2161
	mutex_lock(&mvm->mutex);
	/* Protect the session to hear the TDLS setup response on the channel */
	iwl_mvm_protect_session(mvm, vif, duration, duration, 100);
	mutex_unlock(&mvm->mutex);
2162 2163

	iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
2164 2165
}

2166 2167 2168
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
2169
					struct ieee80211_scan_ies *ies)
2170 2171 2172 2173
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

2174 2175 2176 2177
	ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
	if (ret)
		return ret;

2178 2179
	mutex_lock(&mvm->mutex);

2180
	if (!iwl_mvm_is_idle(mvm)) {
2181 2182 2183 2184
		ret = -EBUSY;
		goto out;
	}

2185
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2186 2187 2188 2189 2190 2191
		ret = -EBUSY;
		goto out;
	}

	mvm->scan_status = IWL_MVM_SCAN_SCHED;

2192 2193 2194 2195 2196
	if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
		ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
		if (ret)
			goto err;
	}
2197 2198 2199 2200 2201

	ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
	if (ret)
		goto err;

2202 2203 2204 2205 2206
	if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
		ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
	else
		ret = iwl_mvm_sched_scan_start(mvm, req);

2207 2208 2209 2210 2211 2212 2213 2214 2215
	if (!ret)
		goto out;
err:
	mvm->scan_status = IWL_MVM_SCAN_NONE;
out:
	mutex_unlock(&mvm->mutex);
	return ret;
}

2216 2217
static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
2218 2219
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2220
	int ret;
2221 2222

	mutex_lock(&mvm->mutex);
2223
	ret = iwl_mvm_scan_offload_stop(mvm, false);
2224
	mutex_unlock(&mvm->mutex);
2225
	iwl_mvm_wait_for_async_handlers(mvm);
2226

2227
	return ret;
2228 2229
}

J
Johannes Berg 已提交
2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262
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:
2263 2264 2265 2266 2267 2268
		/* 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
2269 2270 2271 2272 2273 2274
	}

	mutex_lock(&mvm->mutex);

	switch (cmd) {
	case SET_KEY:
J
Johannes Berg 已提交
2275 2276 2277 2278 2279 2280 2281
		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.
			 */
2282 2283 2284 2285 2286
			ret = 0;
			key->hw_key_idx = STA_KEY_IDX_INVALID;
			break;
		}

J
Johannes Berg 已提交
2287 2288 2289 2290 2291 2292 2293 2294
		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
			 */
2295
			key->hw_key_idx = STA_KEY_IDX_INVALID;
J
Johannes Berg 已提交
2296 2297 2298 2299 2300
			ret = 0;
		}

		break;
	case DISABLE_KEY:
2301 2302 2303 2304 2305
		if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
			ret = 0;
			break;
		}

J
Johannes Berg 已提交
2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324
		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
2325 2326 2327
	if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
		return;

J
Johannes Berg 已提交
2328 2329 2330 2331
	iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
}


2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 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
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);

	te_data->vif = vif;
	te_data->duration = duration;
	te_data->id = HOT_SPOT_CMD;

	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->time_event_lock);
	list_add_tail(&te_data->list, &mvm->time_event_list);
	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
2445 2446 2447
static int iwl_mvm_roc(struct ieee80211_hw *hw,
		       struct ieee80211_vif *vif,
		       struct ieee80211_channel *channel,
2448 2449
		       int duration,
		       enum ieee80211_roc_type type)
J
Johannes Berg 已提交
2450 2451
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2452
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2453
	struct cfg80211_chan_def chandef;
2454 2455 2456 2457 2458
	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
2459

2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470
	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
		/* Use aux roc framework (HS20) */
		ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
					       vif, duration);
		return ret;
	case NL80211_IFTYPE_P2P_DEVICE:
		/* handle below */
		break;
	default:
		IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
J
Johannes Berg 已提交
2471 2472 2473 2474 2475
		return -EINVAL;
	}

	mutex_lock(&mvm->mutex);

2476 2477 2478 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
	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
2508 2509
	cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);

2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555
	/*
	 * 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
2556
	/* Schedule the time events */
2557
	ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
J
Johannes Berg 已提交
2558

2559
out_unlock:
J
Johannes Berg 已提交
2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578
	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;
}

2579 2580
static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
				 struct ieee80211_chanctx_conf *ctx)
J
Johannes Berg 已提交
2581
{
2582 2583
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt;
J
Johannes Berg 已提交
2584 2585
	int ret;

2586 2587
	lockdep_assert_held(&mvm->mutex);

2588
	IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2589 2590 2591 2592 2593 2594

	phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
	if (!phy_ctxt) {
		ret = -ENOSPC;
		goto out;
	}
J
Johannes Berg 已提交
2595

2596
	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2597 2598
				       ctx->rx_chains_static,
				       ctx->rx_chains_dynamic);
2599 2600 2601 2602 2603
	if (ret) {
		IWL_ERR(mvm, "Failed to add PHY context\n");
		goto out;
	}

2604
	iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2605 2606
	*phy_ctxt_id = phy_ctxt->id;
out:
2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617
	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
2618
	mutex_unlock(&mvm->mutex);
2619

J
Johannes Berg 已提交
2620 2621 2622
	return ret;
}

2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633
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
2634 2635 2636 2637 2638 2639
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);
2640
	__iwl_mvm_remove_chanctx(mvm, ctx);
J
Johannes Berg 已提交
2641 2642 2643 2644 2645 2646 2647 2648
	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);
2649 2650
	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
2651

2652 2653 2654
	if (WARN_ONCE((phy_ctxt->ref > 1) &&
		      (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
				   IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2655 2656
				   IEEE80211_CHANCTX_CHANGE_RADAR |
				   IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2657 2658 2659 2660
		      "Cannot change PHY. Ref=%d, changed=0x%X\n",
		      phy_ctxt->ref, changed))
		return;

J
Johannes Berg 已提交
2661
	mutex_lock(&mvm->mutex);
2662
	iwl_mvm_bt_coex_vif_change(mvm);
2663
	iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
J
Johannes Berg 已提交
2664 2665 2666 2667 2668
				 ctx->rx_chains_static,
				 ctx->rx_chains_dynamic);
	mutex_unlock(&mvm->mutex);
}

2669 2670
static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif,
2671 2672
					struct ieee80211_chanctx_conf *ctx,
					bool switching_chanctx)
J
Johannes Berg 已提交
2673
{
2674 2675
	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
2676 2677 2678
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

2679
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
2680

2681
	mvmvif->phy_ctxt = phy_ctxt;
J
Johannes Berg 已提交
2682 2683 2684

	switch (vif->type) {
	case NL80211_IFTYPE_AP:
2685 2686 2687 2688 2689
		/* 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
2690
	case NL80211_IFTYPE_ADHOC:
J
Johannes Berg 已提交
2691 2692
		/*
		 * The AP binding flow is handled as part of the start_ap flow
J
Johannes Berg 已提交
2693
		 * (in bss_info_changed), similarly for IBSS.
J
Johannes Berg 已提交
2694 2695
		 */
		ret = 0;
2696
		goto out;
J
Johannes Berg 已提交
2697 2698 2699 2700 2701
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_MONITOR:
		break;
	default:
		ret = -EINVAL;
2702
		goto out;
J
Johannes Berg 已提交
2703 2704 2705 2706
	}

	ret = iwl_mvm_binding_add_vif(mvm, vif);
	if (ret)
2707
		goto out;
J
Johannes Berg 已提交
2708 2709

	/*
2710 2711 2712
	 * Power state must be updated before quotas,
	 * otherwise fw will complain.
	 */
2713
	iwl_mvm_power_update_mac(mvm);
2714 2715

	/* Setting the quota at this stage is only required for monitor
J
Johannes Berg 已提交
2716 2717 2718 2719
	 * interfaces. For the other types, the bss_info changed flow
	 * will handle quota settings.
	 */
	if (vif->type == NL80211_IFTYPE_MONITOR) {
2720
		mvmvif->monitor_active = true;
2721
		ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
2722 2723 2724 2725
		if (ret)
			goto out_remove_binding;
	}

2726
	/* Handle binding during CSA */
2727 2728
	if ((vif->type == NL80211_IFTYPE_AP) ||
	    (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2729
		iwl_mvm_update_quotas(mvm, NULL);
2730
		iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2731 2732
	}

2733
	goto out;
J
Johannes Berg 已提交
2734

2735
out_remove_binding:
J
Johannes Berg 已提交
2736
	iwl_mvm_binding_remove_vif(mvm, vif);
2737
	iwl_mvm_power_update_mac(mvm);
2738
out:
J
Johannes Berg 已提交
2739 2740 2741 2742
	if (ret)
		mvmvif->phy_ctxt = NULL;
	return ret;
}
2743 2744 2745
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
2746 2747
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2748
	int ret;
J
Johannes Berg 已提交
2749 2750

	mutex_lock(&mvm->mutex);
2751
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2752 2753 2754 2755 2756 2757 2758
	mutex_unlock(&mvm->mutex);

	return ret;
}

static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
					   struct ieee80211_vif *vif,
2759 2760
					   struct ieee80211_chanctx_conf *ctx,
					   bool switching_chanctx)
2761 2762
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2763
	struct ieee80211_vif *disabled_vif = NULL;
2764 2765

	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
2766 2767 2768 2769

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

	switch (vif->type) {
J
Johannes Berg 已提交
2770
	case NL80211_IFTYPE_ADHOC:
2771
		goto out;
J
Johannes Berg 已提交
2772
	case NL80211_IFTYPE_MONITOR:
2773
		mvmvif->monitor_active = false;
J
Johannes Berg 已提交
2774
		break;
2775 2776 2777
	case NL80211_IFTYPE_AP:
		/* This part is triggered only during CSA */
		if (!vif->csa_active || !mvmvif->ap_ibss_active)
2778
			goto out;
2779

2780 2781 2782 2783 2784 2785
		/* 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);

2786
		mvmvif->ap_ibss_active = false;
2787 2788 2789 2790 2791 2792 2793 2794 2795
		break;
	case NL80211_IFTYPE_STATION:
		if (!switching_chanctx)
			break;

		disabled_vif = vif;

		iwl_mvm_mac_ctxt_changed(mvm, vif, true);
		break;
J
Johannes Berg 已提交
2796 2797 2798 2799
	default:
		break;
	}

2800
	iwl_mvm_update_quotas(mvm, disabled_vif);
2801
	iwl_mvm_binding_remove_vif(mvm, vif);
2802

2803
out:
2804
	mvmvif->phy_ctxt = NULL;
2805
	iwl_mvm_power_update_mac(mvm);
2806 2807 2808 2809 2810 2811 2812 2813 2814
}

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);
2815
	__iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
J
Johannes Berg 已提交
2816 2817 2818
	mutex_unlock(&mvm->mutex);
}

2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831
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);
2832
	__iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2833 2834 2835 2836 2837 2838 2839 2840
	__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;
	}

2841 2842
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
					   true);
2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860
	if (ret) {
		IWL_ERR(mvm,
			"failed to assign new_ctx during channel switch\n");
		goto out_remove;
	}

	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;
	}

2861 2862
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
					   true);
2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878
	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
2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893
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);
}

2894 2895 2896 2897
#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 },
2898
	[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929
};

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;

2930
		return iwl_mvm_update_quotas(mvm, NULL);
2931 2932 2933 2934 2935 2936 2937 2938
	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
2939 2940
			return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
		return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960
	}

	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

2961 2962 2963 2964 2965
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);
2966
	struct ieee80211_vif *csa_vif;
2967 2968

	mutex_lock(&mvm->mutex);
2969 2970 2971 2972

	csa_vif = rcu_dereference_protected(mvm->csa_vif,
					    lockdep_is_held(&mvm->mutex));
	if (WARN(csa_vif && csa_vif->csa_active,
2973 2974 2975 2976 2977
		 "Another CSA is already in progress"))
		goto out_unlock;

	IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
			   chandef->center_freq1);
2978
	rcu_assign_pointer(mvm->csa_vif, vif);
2979 2980 2981 2982 2983

out_unlock:
	mutex_unlock(&mvm->mutex);
}

2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011
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);

	if (WARN_ON_ONCE(!mvmsta))
		goto done;

	if (drop) {
		if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
			IWL_ERR(mvm, "flush request fail\n");
	} else {
		iwl_trans_wait_tx_queue_empty(mvm->trans,
					      mvmsta->tfd_queue_msk);
	}
done:
	mutex_unlock(&mvm->mutex);
}

3012
const struct ieee80211_ops iwl_mvm_hw_ops = {
J
Johannes Berg 已提交
3013 3014 3015 3016 3017 3018 3019 3020
	.tx = iwl_mvm_mac_tx,
	.ampdu_action = iwl_mvm_mac_ampdu_action,
	.start = iwl_mvm_mac_start,
	.restart_complete = iwl_mvm_mac_restart_complete,
	.stop = iwl_mvm_mac_stop,
	.add_interface = iwl_mvm_mac_add_interface,
	.remove_interface = iwl_mvm_mac_remove_interface,
	.config = iwl_mvm_mac_config,
3021
	.prepare_multicast = iwl_mvm_prepare_multicast,
J
Johannes Berg 已提交
3022 3023 3024 3025
	.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,
3026
	.sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
J
Johannes Berg 已提交
3027 3028 3029
	.sta_state = iwl_mvm_mac_sta_state,
	.sta_notify = iwl_mvm_mac_sta_notify,
	.allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3030
	.release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
J
Johannes Berg 已提交
3031
	.set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3032
	.sta_rc_update = iwl_mvm_sta_rc_update,
J
Johannes Berg 已提交
3033 3034
	.conf_tx = iwl_mvm_mac_conf_tx,
	.mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3035
	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3036
	.flush = iwl_mvm_mac_flush,
3037 3038
	.sched_scan_start = iwl_mvm_mac_sched_scan_start,
	.sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
J
Johannes Berg 已提交
3039 3040 3041 3042 3043 3044 3045 3046 3047
	.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,
3048
	.switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
J
Johannes Berg 已提交
3049

J
Johannes Berg 已提交
3050 3051 3052 3053
	.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,

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	.channel_switch_beacon = iwl_mvm_channel_switch_beacon,

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	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
};