mac80211.c 98.5 KB
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/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
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 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
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 * in the file called COPYING.
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 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
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 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
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#include <linux/ip.h>
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#include <linux/if_arp.h>
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#include <linux/devcoredump.h>
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#include <net/mac80211.h>
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#include <net/ieee80211_radiotap.h>
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#include <net/tcp.h>
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#include "iwl-op-mode.h"
#include "iwl-io.h"
#include "mvm.h"
#include "sta.h"
#include "time-event.h"
#include "iwl-eeprom-parse.h"
#include "fw-api-scan.h"
#include "iwl-phy-db.h"
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#include "testmode.h"
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#include "iwl-fw-error-dump.h"
#include "iwl-prph.h"
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#include "iwl-csr.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[] = {
	{
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		.num_different_channels = 2,
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		.max_interfaces = 3,
		.limits = iwl_mvm_limits,
		.n_limits = ARRAY_SIZE(iwl_mvm_limits),
	},
};

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#ifdef CONFIG_PM_SLEEP
static const struct nl80211_wowlan_tcp_data_token_feature
iwl_mvm_wowlan_tcp_token_feature = {
	.min_len = 0,
	.max_len = 255,
	.bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
};

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

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#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
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/*
 * Use the reserved field to indicate magic values.
 * these values will only be used internally by the driver,
 * and won't make it to the fw (reserved will be 0).
 * BC_FILTER_MAGIC_IP - configure the val of this attribute to
 *	be the vif's ip address. in case there is not a single
 *	ip address (0, or more than 1), this attribute will
 *	be skipped.
 * BC_FILTER_MAGIC_MAC - set the val of this attribute to
 *	the LSB bytes of the vif's mac address
 */
enum {
	BC_FILTER_MAGIC_NONE = 0,
	BC_FILTER_MAGIC_IP,
	BC_FILTER_MAGIC_MAC,
};

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static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
	{
		/* arp */
		.discard = 0,
		.frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
		.attrs = {
			{
				/* frame type - arp, hw type - ethernet */
				.offset_type =
					BCAST_FILTER_OFFSET_PAYLOAD_START,
				.offset = sizeof(rfc1042_header),
				.val = cpu_to_be32(0x08060001),
				.mask = cpu_to_be32(0xffffffff),
			},
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			{
				/* arp dest ip */
				.offset_type =
					BCAST_FILTER_OFFSET_PAYLOAD_START,
				.offset = sizeof(rfc1042_header) + 2 +
					  sizeof(struct arphdr) +
					  ETH_ALEN + sizeof(__be32) +
					  ETH_ALEN,
				.mask = cpu_to_be32(0xffffffff),
				/* mark it as special field */
				.reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
			},
		},
	},
	{
		/* dhcp offer bcast */
		.discard = 0,
		.frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
		.attrs = {
			{
				/* udp dest port - 68 (bootp client)*/
				.offset_type = BCAST_FILTER_OFFSET_IP_END,
				.offset = offsetof(struct udphdr, dest),
				.val = cpu_to_be32(0x00440000),
				.mask = cpu_to_be32(0xffff0000),
			},
			{
				/* dhcp - lsb bytes of client hw address */
				.offset_type = BCAST_FILTER_OFFSET_IP_END,
				.offset = 38,
				.mask = cpu_to_be32(0xffffffff),
				/* mark it as special field */
				.reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
			},
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		},
	},
	/* last filter must be empty */
	{},
};
#endif

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

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

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

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

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

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

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		IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
			      i, mvm->refs[i]);
		for (j = 0; j < mvm->refs[i]; j++)
			iwl_trans_unref(mvm->trans);
		mvm->refs[i] = 0;
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	}
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	spin_unlock_bh(&mvm->refs_lock);
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}

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bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
{
	int i;
	bool taken = false;

	if (!iwl_mvm_is_d0i3_supported(mvm))
		return true;

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

	return taken;
}

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

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

	return 0;
}

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static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
{
	int i;

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

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int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
{
	struct ieee80211_hw *hw = mvm->hw;
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	int num_mac, ret, i;
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	/* Tell mac80211 our characteristics */
	hw->flags = IEEE80211_HW_SIGNAL_DBM |
		    IEEE80211_HW_SPECTRUM_MGMT |
		    IEEE80211_HW_REPORTS_TX_ACK_STATUS |
		    IEEE80211_HW_QUEUE_CONTROL |
		    IEEE80211_HW_WANT_MONITOR_VIF |
		    IEEE80211_HW_SUPPORTS_PS |
		    IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
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		    IEEE80211_HW_AMPDU_AGGREGATION |
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		    IEEE80211_HW_TIMING_BEACON_ONLY |
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		    IEEE80211_HW_CONNECTION_MONITOR |
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		    IEEE80211_HW_CHANCTX_STA_CSA |
		    IEEE80211_HW_SUPPORTS_CLONED_SKBS;
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	hw->queues = mvm->first_agg_queue;
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	hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
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	hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
				    IEEE80211_RADIOTAP_MCS_HAVE_STBC;
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	hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
		IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
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	hw->rate_control_algorithm = "iwl-mvm-rs";
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	hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
	hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
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	/*
	 * 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.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
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	    mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
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		hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
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		hw->wiphy->features |=
			NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
			NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
	}
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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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	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;
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	/* we can compensate an offset of up to 3 channels = 15 MHz */
	hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
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	/* Extract MAC address */
	memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
	hw->wiphy->addresses = mvm->addresses;
	hw->wiphy->n_addresses = 1;
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	/* Extract additional MAC addresses if available */
	num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
		min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;

	for (i = 1; i < num_mac; i++) {
		memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
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		       ETH_ALEN);
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		mvm->addresses[i].addr[5]++;
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		hw->wiphy->n_addresses++;
	}

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	iwl_mvm_reset_phy_ctxts(mvm);

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

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

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		if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_BEAMFORMER)
			hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
				IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
	}

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

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

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	if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
		hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
		hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
		hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
		/* we create the 802.11 header and zero length SSID IE. */
		hw->wiphy->max_sched_scan_ie_len =
			SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
	}
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	hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
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			       NL80211_FEATURE_LOW_PRIORITY_SCAN |
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			       NL80211_FEATURE_P2P_GO_OPPPS |
			       NL80211_FEATURE_DYNAMIC_SMPS |
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			       NL80211_FEATURE_STATIC_SMPS |
			       NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
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	if (mvm->fw->ucode_capa.capa[0] &
	    IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
		hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
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	if (mvm->fw->ucode_capa.capa[0] &
	    IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
		hw->wiphy->features |= NL80211_FEATURE_QUIET;
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	if (mvm->fw->ucode_capa.capa[0] &
	    IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
		hw->wiphy->features |=
			NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;

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

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	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;

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

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#ifdef CONFIG_PM_SLEEP
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	if (iwl_mvm_is_d0i3_supported(mvm) &&
	    device_can_wakeup(mvm->trans->dev)) {
		mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
		hw->wiphy->wowlan = &mvm->wowlan;
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	}

	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 |
				     WIPHY_WOWLAN_NET_DETECT;
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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;
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		mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
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		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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	if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
		IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
		hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
	}

504 505 506 507 508 509
	if (mvm->fw->ucode_capa.capa[0] &
	    IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
		IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
		hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
	}

510 511 512 513 514
	ret = ieee80211_register_hw(mvm->hw);
	if (ret)
		iwl_mvm_leds_exit(mvm);

	return ret;
J
Johannes Berg 已提交
515 516
}

517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557
static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
			     struct ieee80211_sta *sta,
			     struct sk_buff *skb)
{
	struct iwl_mvm_sta *mvmsta;
	bool defer = false;

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

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

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

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

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

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

J
Johannes Berg 已提交
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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);
563 564 565
	struct ieee80211_sta *sta = control->sta;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (void *)skb->data;
J
Johannes Berg 已提交
566

567 568
	if (iwl_mvm_is_radio_killed(mvm)) {
		IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
J
Johannes Berg 已提交
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		goto drop;
	}

572
	if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
573 574
	    !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
	    !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
J
Johannes Berg 已提交
575 576
		goto drop;

577 578 579 580 581 582 583 584 585
	/* 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) {
586 587
		if (iwl_mvm_defer_tx(mvm, sta, skb))
			return;
588
		if (iwl_mvm_tx_skb(mvm, skb, sta))
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Johannes Berg 已提交
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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);
}

600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617
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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Johannes Berg 已提交
618 619 620 621 622 623 624 625
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;
626
	bool tx_agg_ref = false;
J
Johannes Berg 已提交
627 628 629 630 631 632 633

	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;

634
	/* return from D0i3 before starting a new Tx aggregation */
635 636 637 638 639 640
	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:
641
		/*
642 643 644 645 646 647
		 * 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.
648
		 */
649 650 651 652 653
		ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
		if (ret)
			return ret;

		tx_agg_ref = true;
654 655 656
		break;
	default:
		break;
657 658
	}

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

	switch (action) {
	case IEEE80211_AMPDU_RX_START:
663
		if (!iwl_enable_rx_ampdu(mvm->cfg)) {
J
Johannes Berg 已提交
664 665 666 667 668 669 670 671 672
			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:
673
		if (!iwl_enable_tx_ampdu(mvm->cfg)) {
674 675 676
			ret = -EINVAL;
			break;
		}
J
Johannes Berg 已提交
677 678 679
		ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
		break;
	case IEEE80211_AMPDU_TX_STOP_CONT:
680 681
		ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
		break;
J
Johannes Berg 已提交
682 683
	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
684
		ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
J
Johannes Berg 已提交
685 686 687 688 689 690 691 692 693 694 695
		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);

696 697 698 699 700 701 702
	/*
	 * 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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Johannes Berg 已提交
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718
	return ret;
}

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

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

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

719
	mvmvif->phy_ctxt = NULL;
720
	memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
J
Johannes Berg 已提交
721 722
}

723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765
static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
				     const void *data, size_t datalen)
{
	const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
	ssize_t bytes_read;
	ssize_t bytes_read_trans;

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

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

	if (!dump_ptrs->trans_ptr)
		return bytes_read;

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

	return bytes_read + bytes_read_trans;
}

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

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

766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891
static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
			       struct iwl_fw_error_dump_data **dump_data)
{
	struct iwl_fw_error_dump_fifo *fifo_hdr;
	u32 *fifo_data;
	u32 fifo_len;
	unsigned long flags;
	int i, j;

	if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
		return;

	/* Pull RXF data from all RXFs */
	for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
		/*
		 * Keep aside the additional offset that might be needed for
		 * next RXF
		 */
		u32 offset_diff = RXF_DIFF_FROM_PREV * i;

		fifo_hdr = (void *)(*dump_data)->data;
		fifo_data = (void *)fifo_hdr->data;
		fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];

		/* No need to try to read the data if the length is 0 */
		if (fifo_len == 0)
			continue;

		/* Add a TLV for the RXF */
		(*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
		(*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));

		fifo_hdr->fifo_num = cpu_to_le32(i);
		fifo_hdr->available_bytes =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_RD_D_SPACE +
							offset_diff));
		fifo_hdr->wr_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_RD_WR_PTR +
							offset_diff));
		fifo_hdr->rd_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_RD_RD_PTR +
							offset_diff));
		fifo_hdr->fence_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_RD_FENCE_PTR +
							offset_diff));
		fifo_hdr->fence_mode =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							RXF_SET_FENCE_MODE +
							offset_diff));

		/* Lock fence */
		iwl_trans_write_prph(mvm->trans,
				     RXF_SET_FENCE_MODE + offset_diff, 0x1);
		/* Set fence pointer to the same place like WR pointer */
		iwl_trans_write_prph(mvm->trans,
				     RXF_LD_WR2FENCE + offset_diff, 0x1);
		/* Set fence offset */
		iwl_trans_write_prph(mvm->trans,
				     RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
				     0x0);

		/* Read FIFO */
		fifo_len /= sizeof(u32); /* Size in DWORDS */
		for (j = 0; j < fifo_len; j++)
			fifo_data[j] = iwl_trans_read_prph(mvm->trans,
							 RXF_FIFO_RD_FENCE_INC +
							 offset_diff);
		*dump_data = iwl_fw_error_next_data(*dump_data);
	}

	/* Pull TXF data from all TXFs */
	for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
		/* Mark the number of TXF we're pulling now */
		iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);

		fifo_hdr = (void *)(*dump_data)->data;
		fifo_data = (void *)fifo_hdr->data;
		fifo_len = mvm->shared_mem_cfg.txfifo_size[i];

		/* No need to try to read the data if the length is 0 */
		if (fifo_len == 0)
			continue;

		/* Add a TLV for the FIFO */
		(*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
		(*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));

		fifo_hdr->fifo_num = cpu_to_le32(i);
		fifo_hdr->available_bytes =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_FIFO_ITEM_CNT));
		fifo_hdr->wr_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_WR_PTR));
		fifo_hdr->rd_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_RD_PTR));
		fifo_hdr->fence_ptr =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_FENCE_PTR));
		fifo_hdr->fence_mode =
			cpu_to_le32(iwl_trans_read_prph(mvm->trans,
							TXF_LOCK_FENCE));

		/* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
		iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
				     TXF_WR_PTR);

		/* Dummy-read to advance the read pointer to the head */
		iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);

		/* Read FIFO */
		fifo_len /= sizeof(u32); /* Size in DWORDS */
		for (j = 0; j < fifo_len; j++)
			fifo_data[j] = iwl_trans_read_prph(mvm->trans,
							  TXF_READ_MODIFY_DATA);
		*dump_data = iwl_fw_error_next_data(*dump_data);
	}

	iwl_trans_release_nic_access(mvm->trans, &flags);
}

892
void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
893 894 895 896
{
	struct iwl_fw_error_dump_file *dump_file;
	struct iwl_fw_error_dump_data *dump_data;
	struct iwl_fw_error_dump_info *dump_info;
897
	struct iwl_fw_error_dump_mem *dump_mem;
898
	struct iwl_mvm_dump_ptrs *fw_error_dump;
899
	u32 sram_len, sram_ofs;
900
	u32 file_len, fifo_data_len = 0;
901
	u32 smem_len = mvm->cfg->smem_len;
902
	u32 sram2_len = mvm->cfg->dccm2_len;
903 904 905

	lockdep_assert_held(&mvm->mutex);

906
	/* W/A for 8000 HW family A-step */
907 908 909 910 911 912 913 914
	if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
	    CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_A_STEP) {
		if (smem_len)
			smem_len = 0x38000;

		if (sram2_len)
			sram2_len = 0x10000;
	}
915

916
	fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
917 918 919
	if (!fw_error_dump)
		return;

920 921 922 923 924 925 926 927 928 929 930
	/* SRAM - include stack CCM if driver knows the values for it */
	if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
		const struct fw_img *img;

		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;
	} else {
		sram_ofs = mvm->cfg->dccm_offset;
		sram_len = mvm->cfg->dccm_len;
	}
931

932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952
	/* reading RXF/TXF sizes */
	if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
		struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
		int i;

		fifo_data_len = 0;

		/* Count RXF size */
		for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
			if (!mem_cfg->rxfifo_size[i])
				continue;

			/* Add header info */
			fifo_data_len += mem_cfg->rxfifo_size[i] +
					 sizeof(*dump_data) +
					 sizeof(struct iwl_fw_error_dump_fifo);
		}

		for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
			if (!mem_cfg->txfifo_size[i])
				continue;
953

954 955 956 957 958 959
			/* Add header info */
			fifo_data_len += mem_cfg->txfifo_size[i] +
					 sizeof(*dump_data) +
					 sizeof(struct iwl_fw_error_dump_fifo);
		}
	}
960 961

	file_len = sizeof(*dump_file) +
962
		   sizeof(*dump_data) * 2 +
963
		   sram_len + sizeof(*dump_mem) +
964
		   fifo_data_len +
965 966
		   sizeof(*dump_info);

967 968
	/* Make room for the SMEM, if it exists */
	if (smem_len)
969
		file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
970

971 972 973 974
	/* Make room for the secondary SRAM, if it exists */
	if (sram2_len)
		file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;

975
	dump_file = vzalloc(file_len);
976 977
	if (!dump_file) {
		kfree(fw_error_dump);
978
		return;
979
	}
980

981
	fw_error_dump->op_mode_ptr = dump_file;
982 983 984 985 986 987 988 989 990 991 992

	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);
993
	dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
994 995 996 997 998 999 1000 1001
	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);
1002 1003 1004
	/* We only dump the FIFOs if the FW is in error state */
	if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
		iwl_mvm_dump_fifos(mvm, &dump_data);
1005

1006 1007 1008 1009 1010 1011
	dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
	dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
	dump_mem = (void *)dump_data->data;
	dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
	dump_mem->offset = cpu_to_le32(sram_ofs);
	iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1012 1013
				 sram_len);

1014 1015
	if (smem_len) {
		dump_data = iwl_fw_error_next_data(dump_data);
1016 1017 1018 1019 1020
		dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
		dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
		dump_mem = (void *)dump_data->data;
		dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
		dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1021
		iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1022
					 dump_mem->data, smem_len);
1023 1024
	}

1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035
	if (sram2_len) {
		dump_data = iwl_fw_error_next_data(dump_data);
		dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
		dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
		dump_mem = (void *)dump_data->data;
		dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
		dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
		iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
					 dump_mem->data, sram2_len);
	}

1036 1037 1038 1039 1040
	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);
1041

1042 1043
	dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
		      GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1044 1045
}

J
Johannes Berg 已提交
1046 1047
static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
{
1048 1049 1050 1051 1052 1053
	/* clear the D3 reconfig, we only need it to avoid dumping a
	 * firmware coredump on reconfiguration, we shouldn't do that
	 * on D3->D0 transition
	 */
	if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
		iwl_mvm_fw_error_dump(mvm);
1054

1055 1056 1057 1058 1059
	/* 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
1060 1061 1062
	iwl_trans_stop_device(mvm->trans);

	mvm->scan_status = IWL_MVM_SCAN_NONE;
1063
	mvm->ps_disabled = false;
1064
	mvm->calibrating = false;
J
Johannes Berg 已提交
1065 1066 1067 1068 1069 1070 1071 1072

	/* 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);

1073
	mvm->p2p_device_vif = NULL;
1074
	mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1075 1076

	iwl_mvm_reset_phy_ctxts(mvm);
J
Johannes Berg 已提交
1077 1078
	memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
	memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1079
	memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1080 1081 1082 1083 1084 1085
	memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
	memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
	memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
	memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
	memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
	memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
J
Johannes Berg 已提交
1086 1087 1088

	ieee80211_wake_queues(mvm->hw);

1089 1090 1091
	/* clear any stale d0i3 state */
	clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);

J
Johannes Berg 已提交
1092
	mvm->vif_count = 0;
1093
	mvm->rx_ba_sessions = 0;
J
Johannes Berg 已提交
1094 1095
}

1096
int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
1097 1098 1099
{
	int ret;

1100
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
1101 1102 1103 1104 1105 1106

	/* 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);
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116

	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);
	}

1117 1118 1119 1120 1121 1122 1123 1124
	return ret;
}

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

1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137
	/* Some hw restart cleanups must not hold the mutex */
	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
		/*
		 * Make sure we are out of d0i3. This is needed
		 * to make sure the reference accounting is correct
		 * (and there is no stale d0i3_exit_work).
		 */
		wait_event_timeout(mvm->d0i3_exit_waitq,
				   !test_bit(IWL_MVM_STATUS_IN_D0I3,
					     &mvm->status),
				   HZ);
	}

1138 1139
	mutex_lock(&mvm->mutex);
	ret = __iwl_mvm_mac_start(mvm);
J
Johannes Berg 已提交
1140 1141 1142 1143 1144
	mutex_unlock(&mvm->mutex);

	return ret;
}

1145
static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
1146 1147 1148 1149 1150 1151
{
	int ret;

	mutex_lock(&mvm->mutex);

	clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1152
	iwl_mvm_d0i3_enable_tx(mvm, NULL);
1153
	ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1154 1155 1156 1157
	if (ret)
		IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
			ret);

1158 1159 1160
	/* allow transport/FW low power modes */
	iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);

1161 1162 1163 1164 1165 1166
	/*
	 * If we have TDLS peers, remove them. We don't know the last seqno/PN
	 * of packets the FW sent out, so we must reconnect.
	 */
	iwl_mvm_teardown_tdls_peers(mvm);

J
Johannes Berg 已提交
1167 1168 1169
	mutex_unlock(&mvm->mutex);
}

1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186
static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
{
	bool exit_now;

	if (!iwl_mvm_is_d0i3_supported(mvm))
		return;

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

	if (exit_now) {
		IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
		_iwl_mvm_exit_d0i3(mvm);
	}
1187 1188 1189 1190 1191 1192 1193

	if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
		if (!wait_event_timeout(mvm->d0i3_exit_waitq,
					!test_bit(IWL_MVM_STATUS_IN_D0I3,
						  &mvm->status),
					HZ))
			WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1194 1195
}

1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
static void
iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
			      enum ieee80211_reconfig_type reconfig_type)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	switch (reconfig_type) {
	case IEEE80211_RECONFIG_TYPE_RESTART:
		iwl_mvm_restart_complete(mvm);
		break;
	case IEEE80211_RECONFIG_TYPE_SUSPEND:
1207
		iwl_mvm_resume_complete(mvm);
1208 1209 1210 1211
		break;
	}
}

1212
void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
1213
{
1214
	lockdep_assert_held(&mvm->mutex);
1215

1216 1217 1218 1219 1220 1221 1222
	/*
	 * Disallow low power states when the FW is down by taking
	 * the UCODE_DOWN ref. in case of ongoing hw restart the
	 * ref is already taken, so don't take it again.
	 */
	if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
		iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1223

J
Johannes Berg 已提交
1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237
	/* 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 */
1238
	iwl_mvm_del_aux_sta(mvm);
J
Johannes Berg 已提交
1239

1240 1241 1242 1243 1244 1245
	/*
	 * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
	 * won't be called in this case).
	 */
	clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);

1246
	mvm->ucode_loaded = false;
1247
}
1248

1249 1250 1251 1252 1253 1254
static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	flush_work(&mvm->d0i3_exit_work);
	flush_work(&mvm->async_handlers_wk);
1255
	flush_work(&mvm->fw_error_dump_wk);
1256 1257 1258

	mutex_lock(&mvm->mutex);
	__iwl_mvm_mac_stop(mvm);
J
Johannes Berg 已提交
1259 1260 1261 1262 1263 1264 1265 1266 1267
	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);
}

1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281
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;
}

1282 1283 1284 1285 1286 1287 1288 1289 1290
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
1291
	return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1292 1293 1294 1295
				    sizeof(reduce_txpwr_cmd),
				    &reduce_txpwr_cmd);
}

J
Johannes Berg 已提交
1296 1297 1298 1299 1300 1301 1302
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;

1303 1304 1305 1306 1307 1308 1309 1310 1311
	/*
	 * 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
1312 1313 1314 1315 1316 1317 1318 1319
	/*
	 * 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);

1320
	/* Allocate resources for the MAC context, and add it to the fw  */
J
Johannes Berg 已提交
1321 1322 1323 1324
	ret = iwl_mvm_mac_ctxt_init(mvm, vif);
	if (ret)
		goto out_unlock;

1325
	/* Counting number of interfaces is needed for legacy PM */
1326 1327 1328
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count++;

J
Johannes Berg 已提交
1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339
	/*
	 * 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
1340 1341
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1342
		ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1343 1344 1345 1346 1347
		if (ret) {
			IWL_ERR(mvm, "Failed to allocate bcast sta\n");
			goto out_release;
		}

1348
		iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1349 1350 1351 1352 1353 1354 1355
		goto out_unlock;
	}

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

1356
	ret = iwl_mvm_power_update_mac(mvm);
1357
	if (ret)
1358
		goto out_remove_mac;
J
Johannes Berg 已提交
1359

1360
	/* beacon filtering */
E
Emmanuel Grumbach 已提交
1361
	ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1362 1363 1364
	if (ret)
		goto out_remove_mac;

1365
	if (!mvm->bf_allowed_vif &&
1366
	    vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1367
		mvm->bf_allowed_vif = mvmvif;
1368 1369
		vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
				     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1370 1371
	}

J
Johannes Berg 已提交
1372 1373 1374 1375 1376 1377 1378
	/*
	 * 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) {

1379 1380 1381
		mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
		if (!mvmvif->phy_ctxt) {
			ret = -ENOSPC;
1382
			goto out_free_bf;
1383
		}
J
Johannes Berg 已提交
1384

1385
		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1386 1387
		ret = iwl_mvm_binding_add_vif(mvm, vif);
		if (ret)
1388
			goto out_unref_phy;
J
Johannes Berg 已提交
1389

1390
		ret = iwl_mvm_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1391 1392 1393 1394 1395 1396 1397 1398
		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;
	}

1399
	iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1400 1401 1402 1403
	goto out_unlock;

 out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
1404
 out_unref_phy:
1405
	iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1406 1407 1408
 out_free_bf:
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1409 1410
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1411
	}
J
Johannes Berg 已提交
1412 1413 1414 1415
 out_remove_mac:
	mvmvif->phy_ctxt = NULL;
	iwl_mvm_mac_ctxt_remove(mvm, vif);
 out_release:
1416 1417
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count--;
1418

J
Johannes Berg 已提交
1419 1420 1421 1422
	iwl_mvm_mac_ctxt_release(mvm, vif);
 out_unlock:
	mutex_unlock(&mvm->mutex);

1423 1424
	iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);

J
Johannes Berg 已提交
1425 1426 1427
	return ret;
}

1428 1429
static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1430
{
1431
	u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
J
Johannes Berg 已提交
1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450

	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
1451
		 * triggered. Flush it.
J
Johannes Berg 已提交
1452 1453 1454
		 */
		flush_work(&mvm->sta_drained_wk);
	}
1455 1456 1457 1458 1459 1460 1461 1462 1463
}

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
1464 1465 1466

	mutex_lock(&mvm->mutex);

1467 1468
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1469 1470
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1471 1472
	}

1473 1474
	iwl_mvm_vif_dbgfs_clean(mvm, vif);

J
Johannes Berg 已提交
1475 1476
	/*
	 * For AP/GO interface, the tear down of the resources allocated to the
1477
	 * interface is be handled as part of the stop_ap flow.
J
Johannes Berg 已提交
1478
	 */
J
Johannes Berg 已提交
1479 1480
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1481 1482 1483 1484 1485 1486
#ifdef CONFIG_NL80211_TESTMODE
		if (vif == mvm->noa_vif) {
			mvm->noa_vif = NULL;
			mvm->noa_duration = 0;
		}
#endif
1487
		iwl_mvm_dealloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1488 1489 1490 1491 1492
		goto out_release;
	}

	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		mvm->p2p_device_vif = NULL;
1493
		iwl_mvm_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1494
		iwl_mvm_binding_remove_vif(mvm, vif);
1495
		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1496 1497 1498
		mvmvif->phy_ctxt = NULL;
	}

1499
	if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
J
Johannes Berg 已提交
1500
		mvm->vif_count--;
1501

1502
	iwl_mvm_power_update_mac(mvm);
J
Johannes Berg 已提交
1503 1504 1505 1506 1507 1508 1509 1510
	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)
1511
{
J
Johannes Berg 已提交
1512 1513 1514
	return 0;
}

1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539
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);

1540
	ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1541 1542 1543 1544 1545 1546 1547 1548
	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,
1549 1550
	};

1551 1552 1553 1554 1555
	lockdep_assert_held(&mvm->mutex);

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

1556
	ieee80211_iterate_active_interfaces_atomic(
1557 1558
		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
		iwl_mvm_mc_iface_iterator, &iter_data);
1559 1560
}

1561 1562
static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
				     struct netdev_hw_addr_list *mc_list)
J
Johannes Berg 已提交
1563
{
1564 1565 1566
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mcast_filter_cmd *cmd;
	struct netdev_hw_addr *addr;
1567 1568
	int addr_count;
	bool pass_all;
1569 1570
	int len;

1571 1572 1573 1574
	addr_count = netdev_hw_addr_list_count(mc_list);
	pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
		   IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
	if (pass_all)
1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595
		addr_count = 0;

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

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

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

	return (u64)(unsigned long)cmd;
J
Johannes Berg 已提交
1596 1597 1598 1599 1600 1601 1602
}

static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
				     unsigned int changed_flags,
				     unsigned int *total_flags,
				     u64 multicast)
{
1603 1604
	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
1605

1606
	mutex_lock(&mvm->mutex);
1607

1608 1609 1610
	/* replace previous configuration */
	kfree(mvm->mcast_filter_cmd);
	mvm->mcast_filter_cmd = cmd;
1611

1612 1613
	if (!cmd)
		goto out;
1614

1615 1616 1617 1618
	iwl_mvm_recalc_multicast(mvm);
out:
	mutex_unlock(&mvm->mutex);
	*total_flags = 0;
1619 1620
}

1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643
#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;

1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659
		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;
1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678
		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];

1679 1680 1681 1682 1683 1684
	/*
	 * enable filtering only for associated stations, but not for P2P
	 * Clients
	 */
	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
	    !vif->bss_conf.assoc)
1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718
		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++;
	}
}

1719 1720
bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
				    struct iwl_bcast_filter_cmd *cmd)
1721 1722 1723
{
	struct iwl_bcast_iter_data iter_data = {
		.mvm = mvm,
1724
		.cmd = cmd,
1725 1726
	};

1727 1728 1729
	if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
		return false;

1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743
	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
1744 1745 1746

	/* if no filters are configured, do nothing */
	if (!mvm->bcast_filters)
1747
		return false;
1748 1749 1750 1751 1752 1753

	/* 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);

1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766
	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
1767
	return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1768 1769 1770 1771 1772 1773 1774 1775 1776 1777
				    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
1778 1779 1780 1781 1782 1783 1784 1785
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;

1786 1787 1788 1789 1790 1791 1792 1793
	/*
	 * 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);

1794 1795 1796 1797 1798 1799 1800 1801 1802 1803
	/*
	 * If we're not associated yet, take the (new) BSSID before associating
	 * so the firmware knows. If we're already associated, then use the old
	 * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
	 * branch for disassociation below.
	 */
	if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
		memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);

	ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
J
Johannes Berg 已提交
1804 1805 1806
	if (ret)
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);

1807 1808 1809 1810
	/* after sending it once, adopt mac80211 data */
	memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
	mvmvif->associated = bss_conf->assoc;

J
Johannes Berg 已提交
1811 1812 1813
	if (changes & BSS_CHANGED_ASSOC) {
		if (bss_conf->assoc) {
			/* add quota for this interface */
1814
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1815 1816 1817 1818
			if (ret) {
				IWL_ERR(mvm, "failed to update quotas\n");
				return;
			}
1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837

			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,
1838
							5 * dur, false);
1839
			}
1840 1841

			iwl_mvm_sf_update(mvm, vif, false);
1842
			iwl_mvm_power_vif_assoc(mvm, vif);
1843
			if (vif->p2p) {
1844
				iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1845 1846 1847 1848
				iwl_mvm_update_smps(mvm, vif,
						    IWL_MVM_SMPS_REQ_PROT,
						    IEEE80211_SMPS_DYNAMIC);
			}
J
Johannes Berg 已提交
1849
		} else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1850 1851 1852 1853 1854 1855 1856
			/*
			 * 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
1857 1858 1859 1860
			/* 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");
1861 1862 1863

			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
1864 1865
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
			/* remove quota for this interface */
1866
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1867 1868
			if (ret)
				IWL_ERR(mvm, "failed to update quotas\n");
1869 1870 1871

			if (vif->p2p)
				iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1872 1873 1874 1875 1876 1877 1878

			/* this will take the cleared BSSID from bss_conf */
			ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
			if (ret)
				IWL_ERR(mvm,
					"failed to update MAC %pM (clear after unassoc)\n",
					vif->addr);
J
Johannes Berg 已提交
1879
		}
1880

1881
		iwl_mvm_recalc_multicast(mvm);
1882
		iwl_mvm_configure_bcast_filter(mvm, vif);
1883

1884 1885 1886
		/* reset rssi values */
		mvmvif->bf_data.ave_beacon_signal = 0;

1887
		iwl_mvm_bt_coex_vif_change(mvm);
1888 1889
		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
				    IEEE80211_SMPS_AUTOMATIC);
1890
	} else if (changes & BSS_CHANGED_BEACON_INFO) {
1891 1892 1893 1894 1895 1896
		/*
		 * We received a beacon _after_ association so
		 * remove the session protection.
		 */
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
J
Johannes Berg 已提交
1897
	}
1898 1899 1900 1901 1902 1903

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

1904 1905 1906 1907 1908 1909
	if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
		ret = iwl_mvm_power_update_mac(mvm);
		if (ret)
			IWL_ERR(mvm, "failed to update power mode\n");
	}

1910 1911 1912 1913 1914
	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);
	}
1915 1916

	if (changes & BSS_CHANGED_CQM) {
1917
		IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1918 1919
		/* reset cqm events tracking */
		mvmvif->bf_data.last_cqm_event = 0;
1920 1921 1922 1923 1924 1925
		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");
		}
1926
	}
1927 1928

	if (changes & BSS_CHANGED_ARP_FILTER) {
1929
		IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1930 1931
		iwl_mvm_configure_bcast_filter(mvm, vif);
	}
J
Johannes Berg 已提交
1932 1933
}

J
Johannes Berg 已提交
1934 1935
static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1936 1937 1938 1939 1940
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

1941 1942 1943 1944 1945 1946 1947 1948
	/*
	 * 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
1949 1950 1951 1952 1953 1954 1955
	mutex_lock(&mvm->mutex);

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

1956 1957 1958 1959 1960 1961 1962
	/*
	 * 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
1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974
	/* 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 */
1975
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1976 1977 1978
	if (ret)
		goto out_unbind;

1979 1980 1981
	/* must be set before quota calculations */
	mvmvif->ap_ibss_active = true;

1982
	/* power updated needs to be done before quotas */
1983
	iwl_mvm_power_update_mac(mvm);
1984

1985
	ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1986
	if (ret)
1987
		goto out_quota_failed;
J
Johannes Berg 已提交
1988

J
Johannes Berg 已提交
1989
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
1990
	if (vif->p2p && mvm->p2p_device_vif)
1991
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
1992

1993 1994
	iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);

1995
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
1996

1997 1998 1999 2000
	/* we don't support TDLS during DCM */
	if (iwl_mvm_phy_ctx_count(mvm) > 1)
		iwl_mvm_teardown_tdls_peers(mvm);

J
Johannes Berg 已提交
2001 2002 2003
	mutex_unlock(&mvm->mutex);
	return 0;

2004
out_quota_failed:
2005
	iwl_mvm_power_update_mac(mvm);
2006
	mvmvif->ap_ibss_active = false;
2007
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
2008 2009 2010 2011 2012 2013
out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
out_remove:
	iwl_mvm_mac_ctxt_remove(mvm, vif);
out_unlock:
	mutex_unlock(&mvm->mutex);
2014
	iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
J
Johannes Berg 已提交
2015 2016 2017
	return ret;
}

J
Johannes Berg 已提交
2018 2019
static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
Johannes Berg 已提交
2020 2021 2022 2023
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

2024 2025
	iwl_mvm_prepare_mac_removal(mvm, vif);

J
Johannes Berg 已提交
2026 2027
	mutex_lock(&mvm->mutex);

2028
	/* Handle AP stop while in CSA */
2029 2030 2031
	if (rcu_access_pointer(mvm->csa_vif) == vif) {
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
2032
		RCU_INIT_POINTER(mvm->csa_vif, NULL);
2033
	}
2034

2035 2036 2037 2038 2039
	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
2040
	mvmvif->ap_ibss_active = false;
2041
	mvm->ap_last_beacon_gp2 = 0;
J
Johannes Berg 已提交
2042

2043
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
2044

2045 2046
	iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);

J
Johannes Berg 已提交
2047
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
2048
	if (vif->p2p && mvm->p2p_device_vif)
2049
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
2050

2051
	iwl_mvm_update_quotas(mvm, NULL);
2052
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
2053
	iwl_mvm_binding_remove_vif(mvm, vif);
2054

2055
	iwl_mvm_power_update_mac(mvm);
2056

J
Johannes Berg 已提交
2057 2058 2059 2060 2061
	iwl_mvm_mac_ctxt_remove(mvm, vif);

	mutex_unlock(&mvm->mutex);
}

J
Johannes Berg 已提交
2062 2063 2064 2065 2066
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
2067
{
2068
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2069

2070 2071 2072 2073
	/* Changes will be applied when the AP/IBSS is started */
	if (!mvmvif->ap_ibss_active)
		return;

2074
	if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2075
		       BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2076
	    iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2077
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2078

J
Johannes Berg 已提交
2079
	/* Need to send a new beacon template to the FW */
2080 2081 2082
	if (changes & BSS_CHANGED_BEACON &&
	    iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
		IWL_WARN(mvm, "Failed updating beacon data\n");
2083 2084 2085 2086 2087 2088 2089

	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);
	}

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Johannes Berg 已提交
2090 2091 2092 2093 2094 2095 2096 2097 2098
}

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);

2099 2100 2101 2102 2103 2104 2105 2106
	/*
	 * iwl_mvm_bss_info_changed_station() might call
	 * iwl_mvm_protect_session(), which reads directly from
	 * the device (the system time), so make sure it is available.
	 */
	if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
		return;

J
Johannes Berg 已提交
2107 2108
	mutex_lock(&mvm->mutex);

2109
	if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2110
		iwl_mvm_scan_offload_stop(mvm, true);
2111

J
Johannes Berg 已提交
2112 2113 2114 2115 2116
	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
2117 2118
	case NL80211_IFTYPE_ADHOC:
		iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
J
Johannes Berg 已提交
2119 2120 2121 2122 2123 2124 2125
		break;
	default:
		/* shouldn't happen */
		WARN_ON_ONCE(1);
	}

	mutex_unlock(&mvm->mutex);
2126
	iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
J
Johannes Berg 已提交
2127 2128
}

2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169
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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Johannes Berg 已提交
2170 2171
static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
2172
			       struct ieee80211_scan_request *hw_req)
J
Johannes Berg 已提交
2173 2174
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2175
	struct cfg80211_scan_request *req = &hw_req->req;
J
Johannes Berg 已提交
2176 2177
	int ret;

2178 2179
	if (req->n_channels == 0 ||
	    req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
J
Johannes Berg 已提交
2180 2181
		return -EINVAL;

2182 2183 2184 2185 2186
	if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
		ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
		if (ret)
			return ret;
	}
2187

J
Johannes Berg 已提交
2188 2189
	mutex_lock(&mvm->mutex);

2190
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
J
Johannes Berg 已提交
2191
		ret = -EBUSY;
2192 2193
		goto out;
	}
J
Johannes Berg 已提交
2194

2195 2196
	iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);

2197
	if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2198
		ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
2199 2200
	else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
		ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
2201 2202 2203
	else
		ret = iwl_mvm_scan_request(mvm, vif, req);

2204 2205 2206
	if (ret)
		iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
out:
J
Johannes Berg 已提交
2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224
	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,
2225
				  struct ieee80211_sta *sta, u16 tids,
J
Johannes Berg 已提交
2226 2227 2228 2229 2230 2231
				  int num_frames,
				  enum ieee80211_frame_release_type reason,
				  bool more_data)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

2232
	/* Called when we need to transmit (a) frame(s) from mac80211 */
J
Johannes Berg 已提交
2233

2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250
	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
2251 2252 2253 2254 2255 2256 2257 2258
}

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);
2259
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2260
	int tid;
J
Johannes Berg 已提交
2261 2262 2263

	switch (cmd) {
	case STA_NOTIFY_SLEEP:
2264
		if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
J
Johannes Berg 已提交
2265
			ieee80211_sta_block_awake(hw, sta, true);
2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278
		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
2279 2280 2281 2282 2283 2284 2285
		/*
		 * 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:
2286
		if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
J
Johannes Berg 已提交
2287
			break;
2288
		iwl_mvm_sta_modify_ps_wake(mvm, sta);
J
Johannes Berg 已提交
2289 2290 2291 2292 2293 2294
		break;
	default:
		break;
	}
}

2295 2296 2297 2298 2299
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);
2300
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316

	/*
	 * 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);
}

2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330
static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
				const u8 *bssid)
{
	if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
		return;

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

	vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
}

J
Johannes Berg 已提交
2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353
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) {
2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368
		/*
		 * 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;
		}
2369 2370 2371

		if (sta->tdls &&
		    (vif->p2p ||
2372 2373
		     iwl_mvm_tdls_sta_count(mvm, NULL) ==
						IWL_MVM_TDLS_STA_COUNT ||
2374 2375 2376 2377 2378 2379
		     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
2380
		ret = iwl_mvm_add_sta(mvm, vif, sta);
2381 2382
		if (sta->tdls && ret == 0)
			iwl_mvm_recalc_tdls_state(mvm, vif, true);
J
Johannes Berg 已提交
2383 2384
	} else if (old_state == IEEE80211_STA_NONE &&
		   new_state == IEEE80211_STA_AUTH) {
2385 2386 2387 2388 2389
		/*
		 * 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;
2390
		iwl_mvm_check_uapsd(mvm, vif, sta->addr);
J
Johannes Berg 已提交
2391 2392 2393
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_ASSOC) {
2394 2395 2396
		ret = iwl_mvm_update_sta(mvm, vif, sta);
		if (ret == 0)
			iwl_mvm_rs_rate_init(mvm, sta,
2397 2398
					     mvmvif->phy_ctxt->channel->band,
					     true);
J
Johannes Berg 已提交
2399 2400
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTHORIZED) {
2401 2402 2403 2404 2405

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

2406
		/* enable beacon filtering */
2407
		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2408 2409 2410
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTHORIZED &&
		   new_state == IEEE80211_STA_ASSOC) {
2411
		/* disable beacon filtering */
E
Emmanuel Grumbach 已提交
2412
		WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2413 2414 2415 2416 2417 2418 2419 2420 2421 2422
		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);
2423 2424
		if (sta->tdls)
			iwl_mvm_recalc_tdls_state(mvm, vif, false);
J
Johannes Berg 已提交
2425 2426 2427
	} else {
		ret = -EIO;
	}
2428
 out_unlock:
J
Johannes Berg 已提交
2429 2430
	mutex_unlock(&mvm->mutex);

2431 2432 2433 2434 2435 2436 2437 2438 2439
	if (sta->tdls && ret == 0) {
		if (old_state == IEEE80211_STA_NOTEXIST &&
		    new_state == IEEE80211_STA_NONE)
			ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
		else if (old_state == IEEE80211_STA_NONE &&
			 new_state == IEEE80211_STA_NOTEXIST)
			ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
	}

J
Johannes Berg 已提交
2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451
	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;
}

2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462
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
2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479
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);
2480
		ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
J
Johannes Berg 已提交
2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498
		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;

2499 2500 2501 2502 2503 2504 2505
	/*
	 * 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
2506 2507
	mutex_lock(&mvm->mutex);
	/* Try really hard to protect the session and hear a beacon */
2508
	iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
J
Johannes Berg 已提交
2509
	mutex_unlock(&mvm->mutex);
2510 2511

	iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
J
Johannes Berg 已提交
2512 2513
}

2514 2515 2516
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
2517
					struct ieee80211_scan_ies *ies)
2518 2519 2520 2521
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

2522 2523 2524 2525 2526
	if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
		ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
		if (ret)
			return ret;
	}
2527

2528 2529
	mutex_lock(&mvm->mutex);

2530 2531 2532 2533 2534 2535 2536
	/* Newest FW fixes sched scan while connected on another interface */
	if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
		if (!vif->bss_conf.idle) {
			ret = -EBUSY;
			goto out;
		}
	} else if (!iwl_mvm_is_idle(mvm)) {
2537 2538 2539 2540
		ret = -EBUSY;
		goto out;
	}

2541
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2542 2543 2544 2545
		ret = -EBUSY;
		goto out;
	}

2546
	ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2547
	if (ret)
2548
		mvm->scan_status = IWL_MVM_SCAN_NONE;
2549

2550 2551 2552 2553 2554
out:
	mutex_unlock(&mvm->mutex);
	return ret;
}

2555 2556
static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
2557 2558
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2559
	int ret;
2560 2561

	mutex_lock(&mvm->mutex);
2562
	ret = iwl_mvm_scan_offload_stop(mvm, false);
2563
	mutex_unlock(&mvm->mutex);
2564
	iwl_mvm_wait_for_async_handlers(mvm);
2565

2566
	return ret;
2567

2568 2569
}

J
Johannes Berg 已提交
2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595
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:
2596 2597 2598 2599 2600 2601
		/* For non-client mode, only use WEP keys for TX as we probably
		 * don't have a station yet anyway and would then have to keep
		 * track of the keys, linking them to each of the clients/peers
		 * as they appear. For now, don't do that, for performance WEP
		 * offload doesn't really matter much, but we need it for some
		 * other offload features in client mode.
J
Johannes Berg 已提交
2602
		 */
2603 2604 2605
		if (vif->type != NL80211_IFTYPE_STATION)
			return 0;
		break;
J
Johannes Berg 已提交
2606
	default:
2607 2608 2609 2610 2611 2612
		/* 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
2613 2614 2615 2616 2617 2618
	}

	mutex_lock(&mvm->mutex);

	switch (cmd) {
	case SET_KEY:
J
Johannes Berg 已提交
2619 2620 2621 2622 2623 2624 2625
		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.
			 */
2626 2627 2628 2629 2630
			ret = 0;
			key->hw_key_idx = STA_KEY_IDX_INVALID;
			break;
		}

J
Johannes Berg 已提交
2631 2632 2633 2634 2635 2636 2637 2638
		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
			 */
2639
			key->hw_key_idx = STA_KEY_IDX_INVALID;
J
Johannes Berg 已提交
2640 2641 2642 2643 2644
			ret = 0;
		}

		break;
	case DISABLE_KEY:
2645 2646 2647 2648 2649
		if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
			ret = 0;
			break;
		}

J
Johannes Berg 已提交
2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668
		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
2669 2670 2671
	if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
		return;

J
Johannes Berg 已提交
2672 2673 2674 2675
	iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
}


2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740
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);

2741 2742 2743 2744 2745 2746 2747 2748 2749
	lockdep_assert_held(&mvm->mutex);

	spin_lock_bh(&mvm->time_event_lock);

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

2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793
	te_data->vif = vif;
	te_data->duration = duration;
	te_data->id = HOT_SPOT_CMD;

	spin_unlock_bh(&mvm->time_event_lock);

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

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

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

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

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

	return res;
}

J
Johannes Berg 已提交
2794 2795 2796
static int iwl_mvm_roc(struct ieee80211_hw *hw,
		       struct ieee80211_vif *vif,
		       struct ieee80211_channel *channel,
2797 2798
		       int duration,
		       enum ieee80211_roc_type type)
J
Johannes Berg 已提交
2799 2800
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2801
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2802
	struct cfg80211_chan_def chandef;
2803 2804 2805 2806 2807
	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
2808

2809 2810
	mutex_lock(&mvm->mutex);

2811 2812
	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
2813 2814 2815 2816 2817 2818 2819 2820 2821
		if (mvm->fw->ucode_capa.capa[0] &
		    IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
			/* Use aux roc framework (HS20) */
			ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
						       vif, duration);
			goto out_unlock;
		}
		IWL_ERR(mvm, "hotspot not supported\n");
		ret = -EINVAL;
2822
		goto out_unlock;
2823 2824 2825 2826 2827
	case NL80211_IFTYPE_P2P_DEVICE:
		/* handle below */
		break;
	default:
		IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2828 2829
		ret = -EINVAL;
		goto out_unlock;
J
Johannes Berg 已提交
2830 2831
	}

2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863
	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
2864 2865
	cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);

2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911
	/*
	 * 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
2912
	/* Schedule the time events */
2913
	ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
J
Johannes Berg 已提交
2914

2915
out_unlock:
J
Johannes Berg 已提交
2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927
	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);
2928
	iwl_mvm_stop_roc(mvm);
J
Johannes Berg 已提交
2929 2930 2931 2932 2933 2934
	mutex_unlock(&mvm->mutex);

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

2935 2936
static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
				 struct ieee80211_chanctx_conf *ctx)
J
Johannes Berg 已提交
2937
{
2938 2939
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt;
J
Johannes Berg 已提交
2940 2941
	int ret;

2942 2943
	lockdep_assert_held(&mvm->mutex);

2944
	IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2945 2946 2947 2948 2949 2950

	phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
	if (!phy_ctxt) {
		ret = -ENOSPC;
		goto out;
	}
J
Johannes Berg 已提交
2951

2952
	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2953 2954
				       ctx->rx_chains_static,
				       ctx->rx_chains_dynamic);
2955 2956 2957 2958 2959
	if (ret) {
		IWL_ERR(mvm, "Failed to add PHY context\n");
		goto out;
	}

2960
	iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2961 2962
	*phy_ctxt_id = phy_ctxt->id;
out:
2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973
	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
2974
	mutex_unlock(&mvm->mutex);
2975

J
Johannes Berg 已提交
2976 2977 2978
	return ret;
}

2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989
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
2990 2991 2992 2993 2994 2995
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);
2996
	__iwl_mvm_remove_chanctx(mvm, ctx);
J
Johannes Berg 已提交
2997 2998 2999 3000 3001 3002 3003 3004
	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);
3005 3006
	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
3007

3008 3009 3010
	if (WARN_ONCE((phy_ctxt->ref > 1) &&
		      (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
				   IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3011 3012
				   IEEE80211_CHANCTX_CHANGE_RADAR |
				   IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3013 3014 3015 3016
		      "Cannot change PHY. Ref=%d, changed=0x%X\n",
		      phy_ctxt->ref, changed))
		return;

J
Johannes Berg 已提交
3017
	mutex_lock(&mvm->mutex);
3018
	iwl_mvm_bt_coex_vif_change(mvm);
3019
	iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
J
Johannes Berg 已提交
3020 3021 3022 3023 3024
				 ctx->rx_chains_static,
				 ctx->rx_chains_dynamic);
	mutex_unlock(&mvm->mutex);
}

3025 3026
static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif,
3027 3028
					struct ieee80211_chanctx_conf *ctx,
					bool switching_chanctx)
J
Johannes Berg 已提交
3029
{
3030 3031
	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
3032 3033 3034
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

3035
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
3036

3037
	mvmvif->phy_ctxt = phy_ctxt;
J
Johannes Berg 已提交
3038 3039 3040

	switch (vif->type) {
	case NL80211_IFTYPE_AP:
3041 3042
		/* only needed if we're switching chanctx (i.e. during CSA) */
		if (switching_chanctx) {
3043 3044 3045
			mvmvif->ap_ibss_active = true;
			break;
		}
J
Johannes Berg 已提交
3046
	case NL80211_IFTYPE_ADHOC:
J
Johannes Berg 已提交
3047 3048
		/*
		 * The AP binding flow is handled as part of the start_ap flow
J
Johannes Berg 已提交
3049
		 * (in bss_info_changed), similarly for IBSS.
J
Johannes Berg 已提交
3050 3051
		 */
		ret = 0;
3052
		goto out;
J
Johannes Berg 已提交
3053
	case NL80211_IFTYPE_STATION:
3054
		break;
J
Johannes Berg 已提交
3055
	case NL80211_IFTYPE_MONITOR:
3056 3057
		/* always disable PS when a monitor interface is active */
		mvmvif->ps_disabled = true;
J
Johannes Berg 已提交
3058 3059 3060
		break;
	default:
		ret = -EINVAL;
3061
		goto out;
J
Johannes Berg 已提交
3062 3063 3064 3065
	}

	ret = iwl_mvm_binding_add_vif(mvm, vif);
	if (ret)
3066
		goto out;
J
Johannes Berg 已提交
3067 3068

	/*
3069 3070 3071
	 * Power state must be updated before quotas,
	 * otherwise fw will complain.
	 */
3072
	iwl_mvm_power_update_mac(mvm);
3073 3074

	/* Setting the quota at this stage is only required for monitor
J
Johannes Berg 已提交
3075 3076 3077 3078
	 * interfaces. For the other types, the bss_info changed flow
	 * will handle quota settings.
	 */
	if (vif->type == NL80211_IFTYPE_MONITOR) {
3079
		mvmvif->monitor_active = true;
3080
		ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
3081 3082 3083 3084
		if (ret)
			goto out_remove_binding;
	}

3085
	/* Handle binding during CSA */
3086
	if (vif->type == NL80211_IFTYPE_AP) {
3087
		iwl_mvm_update_quotas(mvm, NULL);
3088
		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3089 3090
	}

3091
	if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110
		u32 duration = 2 * vif->bss_conf.beacon_int;

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

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

		iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);

3111
		iwl_mvm_update_quotas(mvm, NULL);
3112 3113
	}

3114
	goto out;
J
Johannes Berg 已提交
3115

3116
out_remove_binding:
J
Johannes Berg 已提交
3117
	iwl_mvm_binding_remove_vif(mvm, vif);
3118
	iwl_mvm_power_update_mac(mvm);
3119
out:
J
Johannes Berg 已提交
3120 3121 3122 3123
	if (ret)
		mvmvif->phy_ctxt = NULL;
	return ret;
}
3124 3125 3126
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
3127 3128
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3129
	int ret;
J
Johannes Berg 已提交
3130 3131

	mutex_lock(&mvm->mutex);
3132
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3133 3134 3135 3136 3137 3138 3139
	mutex_unlock(&mvm->mutex);

	return ret;
}

static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
					   struct ieee80211_vif *vif,
3140 3141
					   struct ieee80211_chanctx_conf *ctx,
					   bool switching_chanctx)
3142 3143
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3144
	struct ieee80211_vif *disabled_vif = NULL;
3145 3146

	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
3147 3148 3149 3150

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

	switch (vif->type) {
J
Johannes Berg 已提交
3151
	case NL80211_IFTYPE_ADHOC:
3152
		goto out;
J
Johannes Berg 已提交
3153
	case NL80211_IFTYPE_MONITOR:
3154
		mvmvif->monitor_active = false;
3155
		mvmvif->ps_disabled = false;
J
Johannes Berg 已提交
3156
		break;
3157 3158
	case NL80211_IFTYPE_AP:
		/* This part is triggered only during CSA */
3159
		if (!switching_chanctx || !mvmvif->ap_ibss_active)
3160
			goto out;
3161

3162 3163
		mvmvif->csa_countdown = false;

3164 3165 3166 3167 3168 3169
		/* 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);

3170
		mvmvif->ap_ibss_active = false;
3171 3172 3173 3174 3175 3176 3177
		break;
	case NL80211_IFTYPE_STATION:
		if (!switching_chanctx)
			break;

		disabled_vif = vif;

3178
		iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3179
		break;
J
Johannes Berg 已提交
3180 3181 3182 3183
	default:
		break;
	}

3184
	iwl_mvm_update_quotas(mvm, disabled_vif);
3185
	iwl_mvm_binding_remove_vif(mvm, vif);
3186

3187
out:
3188
	mvmvif->phy_ctxt = NULL;
3189
	iwl_mvm_power_update_mac(mvm);
3190 3191 3192 3193 3194 3195 3196 3197 3198
}

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);
3199
	__iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
J
Johannes Berg 已提交
3200 3201 3202
	mutex_unlock(&mvm->mutex);
}

3203 3204 3205
static int
iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
				struct ieee80211_vif_chanctx_switch *vifs)
3206 3207 3208 3209
{
	int ret;

	mutex_lock(&mvm->mutex);
3210
	__iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3211 3212 3213 3214 3215 3216 3217 3218
	__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;
	}

3219 3220
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
					   true);
3221 3222 3223 3224 3225 3226
	if (ret) {
		IWL_ERR(mvm,
			"failed to assign new_ctx during channel switch\n");
		goto out_remove;
	}

3227 3228 3229 3230
	/* we don't support TDLS during DCM - can be caused by channel switch */
	if (iwl_mvm_phy_ctx_count(mvm) > 1)
		iwl_mvm_teardown_tdls_peers(mvm);

3231 3232 3233 3234 3235 3236
	goto out;

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

out_reassign:
3237
	if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3238 3239 3240 3241
		IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
		goto out_restart;
	}

3242 3243
	if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
					 true)) {
3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255
		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);
3256 3257 3258 3259

	return ret;
}

3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297
static int
iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
				    struct ieee80211_vif_chanctx_switch *vifs)
{
	int ret;

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

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

	goto out;

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

	goto out;

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

out:
	mutex_unlock(&mvm->mutex);

	return ret;
}

3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314
static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
				      struct ieee80211_vif_chanctx_switch *vifs,
				      int n_vifs,
				      enum ieee80211_chanctx_switch_mode mode)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

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

	switch (mode) {
	case CHANCTX_SWMODE_SWAP_CONTEXTS:
		ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
		break;
	case CHANCTX_SWMODE_REASSIGN_VIF:
3315
		ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3316 3317 3318 3319 3320 3321
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

3322 3323 3324
	return ret;
}

J
Johannes Berg 已提交
3325 3326 3327 3328 3329
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);
3330
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
3331 3332 3333 3334 3335 3336 3337 3338 3339

	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);
}

3340 3341 3342 3343
#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 },
3344
	[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375
};

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;

3376
		return iwl_mvm_update_quotas(mvm, NULL);
3377 3378 3379 3380 3381 3382 3383 3384
	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
3385 3386
			return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
		return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406
	}

	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

3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420
static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
				   struct ieee80211_vif *vif,
				   struct ieee80211_channel_switch *chsw)
{
	/* By implementing this operation, we prevent mac80211 from
	 * starting its own channel switch timer, so that we can call
	 * ieee80211_chswitch_done() ourselves at the right time
	 * (which is when the absence time event starts).
	 */

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

3421 3422 3423
static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif,
				      struct ieee80211_channel_switch *chsw)
3424 3425
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3426
	struct ieee80211_vif *csa_vif;
3427
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3428
	u32 apply_time;
3429
	int ret;
3430 3431

	mutex_lock(&mvm->mutex);
3432

3433
	IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3434
			   chsw->chandef.center_freq1);
3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446 3447

	switch (vif->type) {
	case NL80211_IFTYPE_AP:
		csa_vif =
			rcu_dereference_protected(mvm->csa_vif,
						  lockdep_is_held(&mvm->mutex));
		if (WARN_ONCE(csa_vif && csa_vif->csa_active,
			      "Another CSA is already in progress")) {
			ret = -EBUSY;
			goto out_unlock;
		}

		rcu_assign_pointer(mvm->csa_vif, vif);
3448 3449 3450 3451 3452 3453 3454

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

3455
		break;
3456
	case NL80211_IFTYPE_STATION:
3457 3458 3459 3460 3461 3462 3463
		/* Schedule the time event to a bit before beacon 1,
		 * to make sure we're in the new channel when the
		 * GO/AP arrives.
		 */
		apply_time = chsw->device_timestamp +
			((vif->bss_conf.beacon_int * (chsw->count - 1) -
			  IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3464 3465 3466 3467

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

3468
		iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3469
					    apply_time);
3470 3471 3472 3473 3474 3475
		if (mvmvif->bf_data.bf_enabled) {
			ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
			if (ret)
				goto out_unlock;
		}

3476
		break;
3477 3478 3479
	default:
		break;
	}
3480

3481 3482 3483 3484 3485
	mvmvif->ps_disabled = true;

	ret = iwl_mvm_power_update_ps(mvm);
	if (ret)
		goto out_unlock;
3486

3487 3488 3489
	/* we won't be on this channel any longer */
	iwl_mvm_teardown_tdls_peers(mvm);

3490 3491
out_unlock:
	mutex_unlock(&mvm->mutex);
3492 3493

	return ret;
3494 3495
}

3496 3497 3498 3499 3500 3501 3502 3503 3504
static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

	mutex_lock(&mvm->mutex);

3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518
	if (vif->type == NL80211_IFTYPE_STATION) {
		struct iwl_mvm_sta *mvmsta;

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

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

		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);

		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3519 3520 3521 3522

		ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
		if (ret)
			goto out_unlock;
3523 3524

		iwl_mvm_stop_session_protection(mvm, vif);
3525 3526
	}

3527 3528 3529 3530
	mvmvif->ps_disabled = false;

	ret = iwl_mvm_power_update_ps(mvm);

3531
out_unlock:
3532 3533 3534 3535 3536
	mutex_unlock(&mvm->mutex);

	return ret;
}

3537 3538 3539 3540 3541 3542
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;
3543 3544 3545
	struct ieee80211_sta *sta;
	int i;
	u32 msk = 0;
3546 3547 3548 3549 3550 3551 3552

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

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

3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567
	/* flush the AP-station and all TDLS peers */
	for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
						lockdep_is_held(&mvm->mutex));
		if (IS_ERR_OR_NULL(sta))
			continue;

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

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

		msk |= mvmsta->tfd_queue_msk;
3568
	}
3569

3570 3571 3572 3573 3574 3575
	if (drop) {
		if (iwl_mvm_flush_tx_path(mvm, msk, true))
			IWL_ERR(mvm, "flush request fail\n");
		mutex_unlock(&mvm->mutex);
	} else {
		mutex_unlock(&mvm->mutex);
3576

3577 3578 3579 3580 3581
		/* this can take a while, and we may need/want other operations
		 * to succeed while doing this, so do it without the mutex held
		 */
		iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
	}
3582 3583
}

3584
const struct ieee80211_ops iwl_mvm_hw_ops = {
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	.tx = iwl_mvm_mac_tx,
	.ampdu_action = iwl_mvm_mac_ampdu_action,
	.start = iwl_mvm_mac_start,
3588
	.reconfig_complete = iwl_mvm_mac_reconfig_complete,
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	.stop = iwl_mvm_mac_stop,
	.add_interface = iwl_mvm_mac_add_interface,
	.remove_interface = iwl_mvm_mac_remove_interface,
	.config = iwl_mvm_mac_config,
3593
	.prepare_multicast = iwl_mvm_prepare_multicast,
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	.configure_filter = iwl_mvm_configure_filter,
	.bss_info_changed = iwl_mvm_bss_info_changed,
	.hw_scan = iwl_mvm_mac_hw_scan,
	.cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3598
	.sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
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	.sta_state = iwl_mvm_mac_sta_state,
	.sta_notify = iwl_mvm_mac_sta_notify,
	.allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3602
	.release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
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	.set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3604
	.sta_rc_update = iwl_mvm_sta_rc_update,
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	.conf_tx = iwl_mvm_mac_conf_tx,
	.mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3607
	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3608
	.flush = iwl_mvm_mac_flush,
3609 3610
	.sched_scan_start = iwl_mvm_mac_sched_scan_start,
	.sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
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	.set_key = iwl_mvm_mac_set_key,
	.update_tkip_key = iwl_mvm_mac_update_tkip_key,
	.remain_on_channel = iwl_mvm_roc,
	.cancel_remain_on_channel = iwl_mvm_cancel_roc,
	.add_chanctx = iwl_mvm_add_chanctx,
	.remove_chanctx = iwl_mvm_remove_chanctx,
	.change_chanctx = iwl_mvm_change_chanctx,
	.assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
	.unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3620
	.switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
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	.start_ap = iwl_mvm_start_ap_ibss,
	.stop_ap = iwl_mvm_stop_ap_ibss,
	.join_ibss = iwl_mvm_start_ap_ibss,
	.leave_ibss = iwl_mvm_stop_ap_ibss,
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	.set_tim = iwl_mvm_set_tim,

3629
	.channel_switch = iwl_mvm_channel_switch,
3630
	.pre_channel_switch = iwl_mvm_pre_channel_switch,
3631
	.post_channel_switch = iwl_mvm_post_channel_switch,
3632

3633 3634 3635 3636
	.tdls_channel_switch = iwl_mvm_tdls_channel_switch,
	.tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
	.tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,

3637 3638
	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
};