mac80211.c 99.5 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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	hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
	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;
	}

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	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;
	}

507 508 509 510 511
	ret = ieee80211_register_hw(mvm->hw);
	if (ret)
		iwl_mvm_leds_exit(mvm);

	return ret;
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}

514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554
static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
			     struct ieee80211_sta *sta,
			     struct sk_buff *skb)
{
	struct iwl_mvm_sta *mvmsta;
	bool defer = false;

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

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

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

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

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

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

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static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
			   struct ieee80211_tx_control *control,
			   struct sk_buff *skb)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
560 561 562
	struct ieee80211_sta *sta = control->sta;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (void *)skb->data;
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564 565
	if (iwl_mvm_is_radio_killed(mvm)) {
		IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
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		goto drop;
	}

569
	if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
570 571
	    !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
	    !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
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		goto drop;

574 575 576 577 578 579 580 581 582
	/* 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) {
583 584
		if (iwl_mvm_defer_tx(mvm, sta, skb))
			return;
585
		if (iwl_mvm_tx_skb(mvm, skb, sta))
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			goto drop;
		return;
	}

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

597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614
static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
{
	if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
		return false;
	return true;
}

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

	/* enabled by default */
	return true;
}

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static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif,
				    enum ieee80211_ampdu_mlme_action action,
				    struct ieee80211_sta *sta, u16 tid,
				    u16 *ssn, u8 buf_size)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;
623
	bool tx_agg_ref = false;
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	IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
		     sta->addr, tid, action);

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

631
	/* return from D0i3 before starting a new Tx aggregation */
632 633 634 635 636 637
	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:
638
		/*
639 640 641 642 643 644
		 * 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.
645
		 */
646 647 648 649 650
		ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
		if (ret)
			return ret;

		tx_agg_ref = true;
651 652 653
		break;
	default:
		break;
654 655
	}

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	mutex_lock(&mvm->mutex);

	switch (action) {
	case IEEE80211_AMPDU_RX_START:
660
		if (!iwl_enable_rx_ampdu(mvm->cfg)) {
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			ret = -EINVAL;
			break;
		}
		ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
		break;
	case IEEE80211_AMPDU_RX_STOP:
		ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
		break;
	case IEEE80211_AMPDU_TX_START:
670
		if (!iwl_enable_tx_ampdu(mvm->cfg)) {
671 672 673
			ret = -EINVAL;
			break;
		}
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		ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
		break;
	case IEEE80211_AMPDU_TX_STOP_CONT:
677 678
		ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
		break;
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	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
681
		ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
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		break;
	case IEEE80211_AMPDU_TX_OPERATIONAL:
		ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
		break;
	default:
		WARN_ON_ONCE(1);
		ret = -EINVAL;
		break;
	}
	mutex_unlock(&mvm->mutex);

693 694 695 696 697 698 699
	/*
	 * If the tid is marked as started, we won't use it for offloaded
	 * traffic on the next D0i3 entry. It's safe to unref.
	 */
	if (tx_agg_ref)
		iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);

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	return ret;
}

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

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

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

716
	mvmvif->phy_ctxt = NULL;
717
	memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
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}

720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762
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);
}

763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888
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);
}

889
void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
890 891 892 893
{
	struct iwl_fw_error_dump_file *dump_file;
	struct iwl_fw_error_dump_data *dump_data;
	struct iwl_fw_error_dump_info *dump_info;
894
	struct iwl_fw_error_dump_mem *dump_mem;
895
	struct iwl_mvm_dump_ptrs *fw_error_dump;
896
	u32 sram_len, sram_ofs;
897
	u32 file_len, fifo_data_len = 0;
898
	u32 smem_len = mvm->cfg->smem_len;
899
	u32 sram2_len = mvm->cfg->dccm2_len;
900 901 902

	lockdep_assert_held(&mvm->mutex);

903
	/* W/A for 8000 HW family A-step */
904 905 906 907 908 909 910 911
	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;
	}
912

913
	fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
914 915 916
	if (!fw_error_dump)
		return;

917 918 919 920 921 922 923 924 925 926 927
	/* 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;
	}
928

929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
	/* 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;
950

951 952 953 954 955 956
			/* Add header info */
			fifo_data_len += mem_cfg->txfifo_size[i] +
					 sizeof(*dump_data) +
					 sizeof(struct iwl_fw_error_dump_fifo);
		}
	}
957 958

	file_len = sizeof(*dump_file) +
959
		   sizeof(*dump_data) * 2 +
960
		   sram_len + sizeof(*dump_mem) +
961
		   fifo_data_len +
962 963
		   sizeof(*dump_info);

964 965
	/* Make room for the SMEM, if it exists */
	if (smem_len)
966
		file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
967

968 969 970 971
	/* Make room for the secondary SRAM, if it exists */
	if (sram2_len)
		file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;

972
	dump_file = vzalloc(file_len);
973 974
	if (!dump_file) {
		kfree(fw_error_dump);
975
		return;
976
	}
977

978
	fw_error_dump->op_mode_ptr = dump_file;
979 980 981 982 983 984 985 986 987 988 989

	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);
990
	dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
991 992 993 994 995 996 997 998
	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);
999 1000 1001
	/* 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);
1002

1003 1004 1005 1006 1007 1008
	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,
1009 1010
				 sram_len);

1011 1012
	if (smem_len) {
		dump_data = iwl_fw_error_next_data(dump_data);
1013 1014 1015 1016 1017
		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);
1018
		iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1019
					 dump_mem->data, smem_len);
1020 1021
	}

1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
	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);
	}

1033 1034 1035 1036 1037
	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);
1038

1039 1040
	dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
		      GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1041 1042
}

J
Johannes Berg 已提交
1043 1044
static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
{
1045 1046 1047 1048 1049 1050
	/* 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);
1051

1052 1053 1054 1055 1056
	/* 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
1057 1058 1059
	iwl_trans_stop_device(mvm->trans);

	mvm->scan_status = IWL_MVM_SCAN_NONE;
1060
	mvm->ps_disabled = false;
1061
	mvm->calibrating = false;
J
Johannes Berg 已提交
1062 1063 1064 1065 1066 1067 1068 1069

	/* 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);

1070
	mvm->p2p_device_vif = NULL;
1071
	mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1072 1073

	iwl_mvm_reset_phy_ctxts(mvm);
J
Johannes Berg 已提交
1074 1075
	memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
	memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1076
	memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1077 1078 1079 1080 1081 1082
	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
1083 1084 1085

	ieee80211_wake_queues(mvm->hw);

1086 1087 1088
	/* clear any stale d0i3 state */
	clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);

J
Johannes Berg 已提交
1089
	mvm->vif_count = 0;
1090
	mvm->rx_ba_sessions = 0;
1091 1092 1093

	/* keep statistics ticking */
	iwl_mvm_accu_radio_stats(mvm);
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
	/* firmware counters are obviously reset now, but we shouldn't
	 * partially track so also clear the fw_reset_accu counters.
	 */
	memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));

1221 1222 1223 1224 1225 1226 1227
	/*
	 * 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);
1228

J
Johannes Berg 已提交
1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242
	/* 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 */
1243
	iwl_mvm_del_aux_sta(mvm);
J
Johannes Berg 已提交
1244

1245 1246 1247 1248 1249 1250
	/*
	 * 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);

1251
	mvm->ucode_loaded = false;
1252
}
1253

1254 1255 1256 1257 1258 1259
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);
1260
	flush_work(&mvm->fw_error_dump_wk);
1261 1262 1263

	mutex_lock(&mvm->mutex);
	__iwl_mvm_mac_stop(mvm);
J
Johannes Berg 已提交
1264 1265 1266 1267 1268 1269 1270 1271 1272
	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);
}

1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286
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;
}

1287 1288 1289 1290 1291 1292 1293 1294 1295
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
1296
	return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1297 1298 1299 1300
				    sizeof(reduce_txpwr_cmd),
				    &reduce_txpwr_cmd);
}

J
Johannes Berg 已提交
1301 1302 1303 1304 1305 1306 1307
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;

1308 1309 1310 1311 1312 1313 1314 1315 1316
	/*
	 * 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
1317 1318 1319 1320 1321 1322 1323 1324
	/*
	 * 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);

1325
	/* Allocate resources for the MAC context, and add it to the fw  */
J
Johannes Berg 已提交
1326 1327 1328 1329
	ret = iwl_mvm_mac_ctxt_init(mvm, vif);
	if (ret)
		goto out_unlock;

1330
	/* Counting number of interfaces is needed for legacy PM */
1331 1332 1333
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count++;

J
Johannes Berg 已提交
1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344
	/*
	 * 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
1345 1346
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1347
		ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1348 1349 1350 1351 1352
		if (ret) {
			IWL_ERR(mvm, "Failed to allocate bcast sta\n");
			goto out_release;
		}

1353
		iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1354 1355 1356 1357 1358 1359 1360
		goto out_unlock;
	}

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

1361
	ret = iwl_mvm_power_update_mac(mvm);
1362
	if (ret)
1363
		goto out_remove_mac;
J
Johannes Berg 已提交
1364

1365
	/* beacon filtering */
E
Emmanuel Grumbach 已提交
1366
	ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1367 1368 1369
	if (ret)
		goto out_remove_mac;

1370
	if (!mvm->bf_allowed_vif &&
1371
	    vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1372
		mvm->bf_allowed_vif = mvmvif;
1373 1374
		vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
				     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1375 1376
	}

J
Johannes Berg 已提交
1377 1378 1379 1380 1381 1382 1383
	/*
	 * 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) {

1384 1385 1386
		mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
		if (!mvmvif->phy_ctxt) {
			ret = -ENOSPC;
1387
			goto out_free_bf;
1388
		}
J
Johannes Berg 已提交
1389

1390
		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1391 1392
		ret = iwl_mvm_binding_add_vif(mvm, vif);
		if (ret)
1393
			goto out_unref_phy;
J
Johannes Berg 已提交
1394

1395
		ret = iwl_mvm_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1396 1397 1398 1399 1400 1401 1402 1403
		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;
	}

1404
	iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1405 1406 1407 1408
	goto out_unlock;

 out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
1409
 out_unref_phy:
1410
	iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1411 1412 1413
 out_free_bf:
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1414 1415
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1416
	}
J
Johannes Berg 已提交
1417 1418 1419 1420
 out_remove_mac:
	mvmvif->phy_ctxt = NULL;
	iwl_mvm_mac_ctxt_remove(mvm, vif);
 out_release:
1421 1422
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count--;
1423

J
Johannes Berg 已提交
1424 1425 1426 1427
	iwl_mvm_mac_ctxt_release(mvm, vif);
 out_unlock:
	mutex_unlock(&mvm->mutex);

1428 1429
	iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);

J
Johannes Berg 已提交
1430 1431 1432
	return ret;
}

1433 1434
static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1435
{
1436
	u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
J
Johannes Berg 已提交
1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455

	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
1456
		 * triggered. Flush it.
J
Johannes Berg 已提交
1457 1458 1459
		 */
		flush_work(&mvm->sta_drained_wk);
	}
1460 1461 1462 1463 1464 1465 1466 1467 1468
}

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
1469 1470 1471

	mutex_lock(&mvm->mutex);

1472 1473
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1474 1475
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1476 1477
	}

1478 1479
	iwl_mvm_vif_dbgfs_clean(mvm, vif);

J
Johannes Berg 已提交
1480 1481
	/*
	 * For AP/GO interface, the tear down of the resources allocated to the
1482
	 * interface is be handled as part of the stop_ap flow.
J
Johannes Berg 已提交
1483
	 */
J
Johannes Berg 已提交
1484 1485
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1486 1487 1488 1489 1490 1491
#ifdef CONFIG_NL80211_TESTMODE
		if (vif == mvm->noa_vif) {
			mvm->noa_vif = NULL;
			mvm->noa_duration = 0;
		}
#endif
1492
		iwl_mvm_dealloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1493 1494 1495 1496 1497
		goto out_release;
	}

	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		mvm->p2p_device_vif = NULL;
1498
		iwl_mvm_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1499
		iwl_mvm_binding_remove_vif(mvm, vif);
1500
		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1501 1502 1503
		mvmvif->phy_ctxt = NULL;
	}

1504
	if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
J
Johannes Berg 已提交
1505
		mvm->vif_count--;
1506

1507
	iwl_mvm_power_update_mac(mvm);
J
Johannes Berg 已提交
1508 1509 1510 1511 1512 1513 1514 1515
	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)
1516
{
J
Johannes Berg 已提交
1517 1518 1519
	return 0;
}

1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544
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);

1545
	ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1546 1547 1548 1549 1550 1551 1552 1553
	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,
1554 1555
	};

1556 1557 1558 1559 1560
	lockdep_assert_held(&mvm->mutex);

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

1561
	ieee80211_iterate_active_interfaces_atomic(
1562 1563
		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
		iwl_mvm_mc_iface_iterator, &iter_data);
1564 1565
}

1566 1567
static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
				     struct netdev_hw_addr_list *mc_list)
J
Johannes Berg 已提交
1568
{
1569 1570 1571
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mcast_filter_cmd *cmd;
	struct netdev_hw_addr *addr;
1572 1573
	int addr_count;
	bool pass_all;
1574 1575
	int len;

1576 1577 1578 1579
	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)
1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600
		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
1601 1602 1603 1604 1605 1606 1607
}

static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
				     unsigned int changed_flags,
				     unsigned int *total_flags,
				     u64 multicast)
{
1608 1609
	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
1610

1611
	mutex_lock(&mvm->mutex);
1612

1613 1614 1615
	/* replace previous configuration */
	kfree(mvm->mcast_filter_cmd);
	mvm->mcast_filter_cmd = cmd;
1616

1617 1618
	if (!cmd)
		goto out;
1619

1620 1621 1622 1623
	iwl_mvm_recalc_multicast(mvm);
out:
	mutex_unlock(&mvm->mutex);
	*total_flags = 0;
1624 1625
}

1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648
#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;

1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664
		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;
1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683
		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];

1684 1685 1686 1687 1688 1689
	/*
	 * enable filtering only for associated stations, but not for P2P
	 * Clients
	 */
	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
	    !vif->bss_conf.assoc)
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 1719 1720 1721 1722 1723
		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++;
	}
}

1724 1725
bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
				    struct iwl_bcast_filter_cmd *cmd)
1726 1727 1728
{
	struct iwl_bcast_iter_data iter_data = {
		.mvm = mvm,
1729
		.cmd = cmd,
1730 1731
	};

1732 1733 1734
	if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
		return false;

1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748
	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
1749 1750 1751

	/* if no filters are configured, do nothing */
	if (!mvm->bcast_filters)
1752
		return false;
1753 1754 1755 1756 1757 1758

	/* 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);

1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771
	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
1772
	return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1773 1774 1775 1776 1777 1778 1779 1780 1781 1782
				    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
1783 1784 1785 1786 1787 1788 1789 1790
static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
					     struct ieee80211_vif *vif,
					     struct ieee80211_bss_conf *bss_conf,
					     u32 changes)
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

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

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

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

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

J
Johannes Berg 已提交
1816 1817 1818
	if (changes & BSS_CHANGED_ASSOC) {
		if (bss_conf->assoc) {
			/* add quota for this interface */
1819
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1820 1821 1822 1823
			if (ret) {
				IWL_ERR(mvm, "failed to update quotas\n");
				return;
			}
1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842

			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,
1843
							5 * dur, false);
1844
			}
1845 1846

			iwl_mvm_sf_update(mvm, vif, false);
1847
			iwl_mvm_power_vif_assoc(mvm, vif);
1848
			if (vif->p2p) {
1849
				iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1850 1851 1852 1853
				iwl_mvm_update_smps(mvm, vif,
						    IWL_MVM_SMPS_REQ_PROT,
						    IEEE80211_SMPS_DYNAMIC);
			}
J
Johannes Berg 已提交
1854
		} else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1855 1856 1857 1858 1859 1860 1861
			/*
			 * 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
1862 1863 1864 1865
			/* 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");
1866 1867 1868

			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
1869 1870
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
			/* remove quota for this interface */
1871
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1872 1873
			if (ret)
				IWL_ERR(mvm, "failed to update quotas\n");
1874 1875 1876

			if (vif->p2p)
				iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1877 1878 1879 1880 1881 1882 1883

			/* 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
1884
		}
1885

1886
		iwl_mvm_recalc_multicast(mvm);
1887
		iwl_mvm_configure_bcast_filter(mvm, vif);
1888

1889 1890 1891
		/* reset rssi values */
		mvmvif->bf_data.ave_beacon_signal = 0;

1892
		iwl_mvm_bt_coex_vif_change(mvm);
1893 1894
		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
				    IEEE80211_SMPS_AUTOMATIC);
1895
	} else if (changes & BSS_CHANGED_BEACON_INFO) {
1896 1897 1898 1899 1900 1901
		/*
		 * 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
1902
	}
1903 1904 1905 1906 1907 1908

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

1909 1910 1911 1912 1913 1914
	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");
	}

1915 1916 1917 1918 1919
	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);
	}
1920 1921

	if (changes & BSS_CHANGED_CQM) {
1922
		IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1923 1924
		/* reset cqm events tracking */
		mvmvif->bf_data.last_cqm_event = 0;
1925 1926 1927 1928 1929 1930
		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");
		}
1931
	}
1932 1933

	if (changes & BSS_CHANGED_ARP_FILTER) {
1934
		IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1935 1936
		iwl_mvm_configure_bcast_filter(mvm, vif);
	}
J
Johannes Berg 已提交
1937 1938
}

J
Johannes Berg 已提交
1939 1940
static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1941 1942 1943 1944 1945
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

1946 1947 1948 1949 1950 1951 1952 1953
	/*
	 * 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
1954 1955 1956 1957 1958 1959 1960
	mutex_lock(&mvm->mutex);

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

1961 1962 1963 1964 1965 1966 1967
	/*
	 * 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
1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979
	/* 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 */
1980
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1981 1982 1983
	if (ret)
		goto out_unbind;

1984 1985 1986
	/* must be set before quota calculations */
	mvmvif->ap_ibss_active = true;

1987
	/* power updated needs to be done before quotas */
1988
	iwl_mvm_power_update_mac(mvm);
1989

1990
	ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1991
	if (ret)
1992
		goto out_quota_failed;
J
Johannes Berg 已提交
1993

J
Johannes Berg 已提交
1994
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
1995
	if (vif->p2p && mvm->p2p_device_vif)
1996
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
1997

1998 1999
	iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);

2000
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
2001

2002 2003 2004 2005
	/* 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
2006 2007 2008
	mutex_unlock(&mvm->mutex);
	return 0;

2009
out_quota_failed:
2010
	iwl_mvm_power_update_mac(mvm);
2011
	mvmvif->ap_ibss_active = false;
2012
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
2013 2014 2015 2016 2017 2018
out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
out_remove:
	iwl_mvm_mac_ctxt_remove(mvm, vif);
out_unlock:
	mutex_unlock(&mvm->mutex);
2019
	iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
J
Johannes Berg 已提交
2020 2021 2022
	return ret;
}

J
Johannes Berg 已提交
2023 2024
static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
Johannes Berg 已提交
2025 2026 2027 2028
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

2029 2030
	iwl_mvm_prepare_mac_removal(mvm, vif);

J
Johannes Berg 已提交
2031 2032
	mutex_lock(&mvm->mutex);

2033
	/* Handle AP stop while in CSA */
2034 2035 2036
	if (rcu_access_pointer(mvm->csa_vif) == vif) {
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
2037
		RCU_INIT_POINTER(mvm->csa_vif, NULL);
2038
	}
2039

2040 2041 2042 2043 2044
	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
2045
	mvmvif->ap_ibss_active = false;
2046
	mvm->ap_last_beacon_gp2 = 0;
J
Johannes Berg 已提交
2047

2048
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
2049

2050 2051
	iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);

J
Johannes Berg 已提交
2052
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
2053
	if (vif->p2p && mvm->p2p_device_vif)
2054
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
2055

2056
	iwl_mvm_update_quotas(mvm, NULL);
2057
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
2058
	iwl_mvm_binding_remove_vif(mvm, vif);
2059

2060
	iwl_mvm_power_update_mac(mvm);
2061

J
Johannes Berg 已提交
2062 2063 2064 2065 2066
	iwl_mvm_mac_ctxt_remove(mvm, vif);

	mutex_unlock(&mvm->mutex);
}

J
Johannes Berg 已提交
2067 2068 2069 2070 2071
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
2072
{
2073
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2074

2075 2076 2077 2078
	/* Changes will be applied when the AP/IBSS is started */
	if (!mvmvif->ap_ibss_active)
		return;

2079
	if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2080
		       BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2081
	    iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2082
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2083

J
Johannes Berg 已提交
2084
	/* Need to send a new beacon template to the FW */
2085 2086 2087
	if (changes & BSS_CHANGED_BEACON &&
	    iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
		IWL_WARN(mvm, "Failed updating beacon data\n");
2088 2089 2090 2091 2092 2093 2094

	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
2095 2096 2097 2098 2099 2100 2101 2102 2103
}

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);

2104 2105 2106 2107 2108 2109 2110 2111
	/*
	 * 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
2112 2113
	mutex_lock(&mvm->mutex);

2114
	if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2115
		iwl_mvm_scan_offload_stop(mvm, true);
2116

J
Johannes Berg 已提交
2117 2118 2119 2120 2121
	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
2122 2123
	case NL80211_IFTYPE_ADHOC:
		iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
J
Johannes Berg 已提交
2124 2125 2126 2127 2128 2129 2130
		break;
	default:
		/* shouldn't happen */
		WARN_ON_ONCE(1);
	}

	mutex_unlock(&mvm->mutex);
2131
	iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
J
Johannes Berg 已提交
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 2170 2171 2172 2173 2174
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
2175 2176
static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
2177
			       struct ieee80211_scan_request *hw_req)
J
Johannes Berg 已提交
2178 2179
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2180
	struct cfg80211_scan_request *req = &hw_req->req;
J
Johannes Berg 已提交
2181 2182
	int ret;

2183 2184
	if (req->n_channels == 0 ||
	    req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
J
Johannes Berg 已提交
2185 2186
		return -EINVAL;

2187 2188 2189 2190 2191
	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;
	}
2192

J
Johannes Berg 已提交
2193 2194
	mutex_lock(&mvm->mutex);

2195
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
J
Johannes Berg 已提交
2196
		ret = -EBUSY;
2197 2198
		goto out;
	}
J
Johannes Berg 已提交
2199

2200 2201
	iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);

2202
	if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2203
		ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
2204
	else
2205
		ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
2206

2207 2208 2209
	if (ret)
		iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
out:
J
Johannes Berg 已提交
2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227
	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,
2228
				  struct ieee80211_sta *sta, u16 tids,
J
Johannes Berg 已提交
2229 2230 2231 2232 2233 2234
				  int num_frames,
				  enum ieee80211_frame_release_type reason,
				  bool more_data)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

2235
	/* Called when we need to transmit (a) frame(s) from mac80211 */
J
Johannes Berg 已提交
2236

2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253
	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
2254 2255 2256 2257 2258 2259 2260 2261
}

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);
2262
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2263
	int tid;
J
Johannes Berg 已提交
2264 2265 2266

	switch (cmd) {
	case STA_NOTIFY_SLEEP:
2267
		if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
J
Johannes Berg 已提交
2268
			ieee80211_sta_block_awake(hw, sta, true);
2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281
		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
2282 2283 2284 2285 2286 2287 2288
		/*
		 * 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:
2289
		if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
J
Johannes Berg 已提交
2290
			break;
2291
		iwl_mvm_sta_modify_ps_wake(mvm, sta);
J
Johannes Berg 已提交
2292 2293 2294 2295 2296 2297
		break;
	default:
		break;
	}
}

2298 2299 2300 2301 2302
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);
2303
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319

	/*
	 * 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);
}

2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333
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
2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356
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) {
2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371
		/*
		 * 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;
		}
2372 2373 2374

		if (sta->tdls &&
		    (vif->p2p ||
2375 2376
		     iwl_mvm_tdls_sta_count(mvm, NULL) ==
						IWL_MVM_TDLS_STA_COUNT ||
2377 2378 2379 2380 2381 2382
		     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
2383
		ret = iwl_mvm_add_sta(mvm, vif, sta);
2384 2385
		if (sta->tdls && ret == 0)
			iwl_mvm_recalc_tdls_state(mvm, vif, true);
J
Johannes Berg 已提交
2386 2387
	} else if (old_state == IEEE80211_STA_NONE &&
		   new_state == IEEE80211_STA_AUTH) {
2388 2389 2390 2391 2392
		/*
		 * 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;
2393
		iwl_mvm_check_uapsd(mvm, vif, sta->addr);
J
Johannes Berg 已提交
2394 2395 2396
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_ASSOC) {
2397 2398 2399
		ret = iwl_mvm_update_sta(mvm, vif, sta);
		if (ret == 0)
			iwl_mvm_rs_rate_init(mvm, sta,
2400 2401
					     mvmvif->phy_ctxt->channel->band,
					     true);
J
Johannes Berg 已提交
2402 2403
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTHORIZED) {
2404 2405 2406 2407 2408

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

2409
		/* enable beacon filtering */
2410
		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2411 2412 2413
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTHORIZED &&
		   new_state == IEEE80211_STA_ASSOC) {
2414
		/* disable beacon filtering */
E
Emmanuel Grumbach 已提交
2415
		WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
J
Johannes Berg 已提交
2416 2417 2418 2419 2420 2421 2422 2423 2424 2425
		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);
2426 2427
		if (sta->tdls)
			iwl_mvm_recalc_tdls_state(mvm, vif, false);
J
Johannes Berg 已提交
2428 2429 2430
	} else {
		ret = -EIO;
	}
2431
 out_unlock:
J
Johannes Berg 已提交
2432 2433
	mutex_unlock(&mvm->mutex);

2434 2435 2436 2437 2438 2439 2440 2441 2442
	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
2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454
	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;
}

2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465
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
2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482
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);
2483
		ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
J
Johannes Berg 已提交
2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501
		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;

2502 2503 2504 2505 2506 2507 2508
	/*
	 * 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
2509 2510
	mutex_lock(&mvm->mutex);
	/* Try really hard to protect the session and hear a beacon */
2511
	iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
J
Johannes Berg 已提交
2512
	mutex_unlock(&mvm->mutex);
2513 2514

	iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
J
Johannes Berg 已提交
2515 2516
}

2517 2518 2519
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
2520
					struct ieee80211_scan_ies *ies)
2521 2522 2523 2524
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

2525 2526 2527 2528 2529
	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;
	}
2530

2531 2532
	mutex_lock(&mvm->mutex);

2533
	if (!vif->bss_conf.idle) {
2534 2535 2536 2537
		ret = -EBUSY;
		goto out;
	}

2538
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2539 2540 2541 2542
		ret = -EBUSY;
		goto out;
	}

2543
	ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2544
	if (ret)
2545
		mvm->scan_status = IWL_MVM_SCAN_NONE;
2546

2547 2548 2549 2550 2551
out:
	mutex_unlock(&mvm->mutex);
	return ret;
}

2552 2553
static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
2554 2555
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2556
	int ret;
2557 2558

	mutex_lock(&mvm->mutex);
2559
	ret = iwl_mvm_scan_offload_stop(mvm, false);
2560
	mutex_unlock(&mvm->mutex);
2561
	iwl_mvm_wait_for_async_handlers(mvm);
2562

2563
	return ret;
2564

2565 2566
}

J
Johannes Berg 已提交
2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592
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:
2593 2594 2595 2596 2597 2598
		/* 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
2599
		 */
2600 2601 2602
		if (vif->type != NL80211_IFTYPE_STATION)
			return 0;
		break;
J
Johannes Berg 已提交
2603
	default:
2604 2605 2606 2607 2608 2609
		/* 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
2610 2611 2612 2613 2614 2615
	}

	mutex_lock(&mvm->mutex);

	switch (cmd) {
	case SET_KEY:
J
Johannes Berg 已提交
2616 2617 2618 2619 2620 2621 2622
		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.
			 */
2623 2624 2625 2626 2627
			ret = 0;
			key->hw_key_idx = STA_KEY_IDX_INVALID;
			break;
		}

J
Johannes Berg 已提交
2628 2629 2630 2631 2632 2633 2634 2635
		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
			 */
2636
			key->hw_key_idx = STA_KEY_IDX_INVALID;
J
Johannes Berg 已提交
2637 2638 2639 2640 2641
			ret = 0;
		}

		break;
	case DISABLE_KEY:
2642 2643 2644 2645 2646
		if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
			ret = 0;
			break;
		}

J
Johannes Berg 已提交
2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665
		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
2666 2667 2668
	if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
		return;

J
Johannes Berg 已提交
2669 2670 2671 2672
	iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
}


2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 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
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);

2738 2739 2740 2741 2742 2743 2744 2745 2746
	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;
	}

2747 2748 2749 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
	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
2791 2792 2793
static int iwl_mvm_roc(struct ieee80211_hw *hw,
		       struct ieee80211_vif *vif,
		       struct ieee80211_channel *channel,
2794 2795
		       int duration,
		       enum ieee80211_roc_type type)
J
Johannes Berg 已提交
2796 2797
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2798
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2799
	struct cfg80211_chan_def chandef;
2800 2801 2802 2803 2804
	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
2805

2806 2807
	mutex_lock(&mvm->mutex);

2808 2809
	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
2810 2811 2812 2813 2814 2815 2816 2817 2818
		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;
2819
		goto out_unlock;
2820 2821 2822 2823 2824
	case NL80211_IFTYPE_P2P_DEVICE:
		/* handle below */
		break;
	default:
		IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2825 2826
		ret = -EINVAL;
		goto out_unlock;
J
Johannes Berg 已提交
2827 2828
	}

2829 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
	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
2861 2862
	cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);

2863 2864 2865 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
	/*
	 * 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
2909
	/* Schedule the time events */
2910
	ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
J
Johannes Berg 已提交
2911

2912
out_unlock:
J
Johannes Berg 已提交
2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924
	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);
2925
	iwl_mvm_stop_roc(mvm);
J
Johannes Berg 已提交
2926 2927 2928 2929 2930 2931
	mutex_unlock(&mvm->mutex);

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

2932 2933
static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
				 struct ieee80211_chanctx_conf *ctx)
J
Johannes Berg 已提交
2934
{
2935 2936
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt;
J
Johannes Berg 已提交
2937 2938
	int ret;

2939 2940
	lockdep_assert_held(&mvm->mutex);

2941
	IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2942 2943 2944 2945 2946 2947

	phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
	if (!phy_ctxt) {
		ret = -ENOSPC;
		goto out;
	}
J
Johannes Berg 已提交
2948

2949
	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2950 2951
				       ctx->rx_chains_static,
				       ctx->rx_chains_dynamic);
2952 2953 2954 2955 2956
	if (ret) {
		IWL_ERR(mvm, "Failed to add PHY context\n");
		goto out;
	}

2957
	iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2958 2959
	*phy_ctxt_id = phy_ctxt->id;
out:
2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970
	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
2971
	mutex_unlock(&mvm->mutex);
2972

J
Johannes Berg 已提交
2973 2974 2975
	return ret;
}

2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986
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
2987 2988 2989 2990 2991 2992
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);
2993
	__iwl_mvm_remove_chanctx(mvm, ctx);
J
Johannes Berg 已提交
2994 2995 2996 2997 2998 2999 3000 3001
	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);
3002 3003
	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
3004

3005 3006 3007
	if (WARN_ONCE((phy_ctxt->ref > 1) &&
		      (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
				   IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3008 3009
				   IEEE80211_CHANCTX_CHANGE_RADAR |
				   IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3010 3011 3012 3013
		      "Cannot change PHY. Ref=%d, changed=0x%X\n",
		      phy_ctxt->ref, changed))
		return;

J
Johannes Berg 已提交
3014
	mutex_lock(&mvm->mutex);
3015
	iwl_mvm_bt_coex_vif_change(mvm);
3016
	iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
J
Johannes Berg 已提交
3017 3018 3019 3020 3021
				 ctx->rx_chains_static,
				 ctx->rx_chains_dynamic);
	mutex_unlock(&mvm->mutex);
}

3022 3023
static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif,
3024 3025
					struct ieee80211_chanctx_conf *ctx,
					bool switching_chanctx)
J
Johannes Berg 已提交
3026
{
3027 3028
	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
3029 3030 3031
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

3032
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
3033

3034
	mvmvif->phy_ctxt = phy_ctxt;
J
Johannes Berg 已提交
3035 3036 3037

	switch (vif->type) {
	case NL80211_IFTYPE_AP:
3038 3039
		/* only needed if we're switching chanctx (i.e. during CSA) */
		if (switching_chanctx) {
3040 3041 3042
			mvmvif->ap_ibss_active = true;
			break;
		}
J
Johannes Berg 已提交
3043
	case NL80211_IFTYPE_ADHOC:
J
Johannes Berg 已提交
3044 3045
		/*
		 * The AP binding flow is handled as part of the start_ap flow
J
Johannes Berg 已提交
3046
		 * (in bss_info_changed), similarly for IBSS.
J
Johannes Berg 已提交
3047 3048
		 */
		ret = 0;
3049
		goto out;
J
Johannes Berg 已提交
3050
	case NL80211_IFTYPE_STATION:
3051
		break;
J
Johannes Berg 已提交
3052
	case NL80211_IFTYPE_MONITOR:
3053 3054
		/* always disable PS when a monitor interface is active */
		mvmvif->ps_disabled = true;
J
Johannes Berg 已提交
3055 3056 3057
		break;
	default:
		ret = -EINVAL;
3058
		goto out;
J
Johannes Berg 已提交
3059 3060 3061 3062
	}

	ret = iwl_mvm_binding_add_vif(mvm, vif);
	if (ret)
3063
		goto out;
J
Johannes Berg 已提交
3064 3065

	/*
3066 3067 3068
	 * Power state must be updated before quotas,
	 * otherwise fw will complain.
	 */
3069
	iwl_mvm_power_update_mac(mvm);
3070 3071

	/* Setting the quota at this stage is only required for monitor
J
Johannes Berg 已提交
3072 3073 3074 3075
	 * interfaces. For the other types, the bss_info changed flow
	 * will handle quota settings.
	 */
	if (vif->type == NL80211_IFTYPE_MONITOR) {
3076
		mvmvif->monitor_active = true;
3077
		ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
3078 3079 3080 3081
		if (ret)
			goto out_remove_binding;
	}

3082
	/* Handle binding during CSA */
3083
	if (vif->type == NL80211_IFTYPE_AP) {
3084
		iwl_mvm_update_quotas(mvm, NULL);
3085
		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3086 3087
	}

3088
	if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107
		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);

3108
		iwl_mvm_update_quotas(mvm, NULL);
3109 3110
	}

3111
	goto out;
J
Johannes Berg 已提交
3112

3113
out_remove_binding:
J
Johannes Berg 已提交
3114
	iwl_mvm_binding_remove_vif(mvm, vif);
3115
	iwl_mvm_power_update_mac(mvm);
3116
out:
J
Johannes Berg 已提交
3117 3118 3119 3120
	if (ret)
		mvmvif->phy_ctxt = NULL;
	return ret;
}
3121 3122 3123
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
3124 3125
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3126
	int ret;
J
Johannes Berg 已提交
3127 3128

	mutex_lock(&mvm->mutex);
3129
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3130 3131 3132 3133 3134 3135 3136
	mutex_unlock(&mvm->mutex);

	return ret;
}

static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
					   struct ieee80211_vif *vif,
3137 3138
					   struct ieee80211_chanctx_conf *ctx,
					   bool switching_chanctx)
3139 3140
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3141
	struct ieee80211_vif *disabled_vif = NULL;
3142 3143

	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
3144 3145 3146 3147

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

	switch (vif->type) {
J
Johannes Berg 已提交
3148
	case NL80211_IFTYPE_ADHOC:
3149
		goto out;
J
Johannes Berg 已提交
3150
	case NL80211_IFTYPE_MONITOR:
3151
		mvmvif->monitor_active = false;
3152
		mvmvif->ps_disabled = false;
J
Johannes Berg 已提交
3153
		break;
3154 3155
	case NL80211_IFTYPE_AP:
		/* This part is triggered only during CSA */
3156
		if (!switching_chanctx || !mvmvif->ap_ibss_active)
3157
			goto out;
3158

3159 3160
		mvmvif->csa_countdown = false;

3161 3162 3163 3164 3165 3166
		/* 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);

3167
		mvmvif->ap_ibss_active = false;
3168 3169 3170 3171 3172 3173 3174
		break;
	case NL80211_IFTYPE_STATION:
		if (!switching_chanctx)
			break;

		disabled_vif = vif;

3175
		iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3176
		break;
J
Johannes Berg 已提交
3177 3178 3179 3180
	default:
		break;
	}

3181
	iwl_mvm_update_quotas(mvm, disabled_vif);
3182
	iwl_mvm_binding_remove_vif(mvm, vif);
3183

3184
out:
3185
	mvmvif->phy_ctxt = NULL;
3186
	iwl_mvm_power_update_mac(mvm);
3187 3188 3189 3190 3191 3192 3193 3194 3195
}

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);
3196
	__iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
J
Johannes Berg 已提交
3197 3198 3199
	mutex_unlock(&mvm->mutex);
}

3200 3201 3202
static int
iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
				struct ieee80211_vif_chanctx_switch *vifs)
3203 3204 3205 3206
{
	int ret;

	mutex_lock(&mvm->mutex);
3207
	__iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3208 3209 3210 3211 3212 3213 3214 3215
	__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;
	}

3216 3217
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
					   true);
3218 3219 3220 3221 3222 3223
	if (ret) {
		IWL_ERR(mvm,
			"failed to assign new_ctx during channel switch\n");
		goto out_remove;
	}

3224 3225 3226 3227
	/* 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);

3228 3229 3230 3231 3232 3233
	goto out;

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

out_reassign:
3234
	if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3235 3236 3237 3238
		IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
		goto out_restart;
	}

3239 3240
	if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
					 true)) {
3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252
		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);
3253 3254 3255 3256

	return ret;
}

3257 3258 3259 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
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;
}

3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311
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:
3312
		ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3313 3314 3315 3316 3317 3318
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

3319 3320 3321
	return ret;
}

J
Johannes Berg 已提交
3322 3323 3324 3325 3326
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);
3327
	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
J
Johannes Berg 已提交
3328 3329 3330 3331 3332 3333 3334 3335 3336

	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);
}

3337 3338 3339 3340
#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 },
3341
	[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3342 3343 3344 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
};

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;

3373
		return iwl_mvm_update_quotas(mvm, NULL);
3374 3375 3376 3377 3378 3379 3380 3381
	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
3382 3383
			return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
		return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403
	}

	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

3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417
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");
}

3418 3419 3420
static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif,
				      struct ieee80211_channel_switch *chsw)
3421 3422
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3423
	struct ieee80211_vif *csa_vif;
3424
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3425
	u32 apply_time;
3426
	int ret;
3427 3428

	mutex_lock(&mvm->mutex);
3429

3430
	IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3431
			   chsw->chandef.center_freq1);
3432 3433 3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444

	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);
3445 3446 3447 3448 3449 3450 3451

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

3452
		break;
3453
	case NL80211_IFTYPE_STATION:
3454 3455 3456 3457 3458 3459 3460
		/* 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);
3461 3462 3463 3464

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

3465
		iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3466
					    apply_time);
3467 3468 3469 3470 3471 3472
		if (mvmvif->bf_data.bf_enabled) {
			ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
			if (ret)
				goto out_unlock;
		}

3473
		break;
3474 3475 3476
	default:
		break;
	}
3477

3478 3479 3480 3481 3482
	mvmvif->ps_disabled = true;

	ret = iwl_mvm_power_update_ps(mvm);
	if (ret)
		goto out_unlock;
3483

3484 3485 3486
	/* we won't be on this channel any longer */
	iwl_mvm_teardown_tdls_peers(mvm);

3487 3488
out_unlock:
	mutex_unlock(&mvm->mutex);
3489 3490

	return ret;
3491 3492
}

3493 3494 3495 3496 3497 3498 3499 3500 3501
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);

3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515
	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);
3516 3517 3518 3519

		ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
		if (ret)
			goto out_unlock;
3520 3521

		iwl_mvm_stop_session_protection(mvm, vif);
3522 3523
	}

3524 3525 3526 3527
	mvmvif->ps_disabled = false;

	ret = iwl_mvm_power_update_ps(mvm);

3528
out_unlock:
3529 3530 3531 3532 3533
	mutex_unlock(&mvm->mutex);

	return ret;
}

3534 3535 3536 3537 3538 3539
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;
3540 3541 3542
	struct ieee80211_sta *sta;
	int i;
	u32 msk = 0;
3543 3544 3545 3546 3547 3548 3549

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

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

3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564
	/* 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;
3565
	}
3566

3567 3568 3569 3570 3571 3572
	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);
3573

3574 3575 3576 3577 3578
		/* 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);
	}
3579 3580
}

3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629
static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
				  struct survey_info *survey)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

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

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

	if (!(mvm->fw->ucode_capa.capa[0] &
			IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
		return -ENOENT;

	mutex_lock(&mvm->mutex);

	if (mvm->ucode_loaded) {
		ret = iwl_mvm_request_statistics(mvm);
		if (ret)
			goto out;
	}

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

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

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

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

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

3630
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,
3634
	.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,
3639
	.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,
3644
	.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,
3648
	.release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
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	.set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3650
	.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,
3653
	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3654
	.flush = iwl_mvm_mac_flush,
3655 3656
	.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,
3666
	.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,

3675
	.channel_switch = iwl_mvm_channel_switch,
3676
	.pre_channel_switch = iwl_mvm_pre_channel_switch,
3677
	.post_channel_switch = iwl_mvm_post_channel_switch,
3678

3679 3680 3681 3682
	.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,

3683 3684
	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
3696
	.get_survey = iwl_mvm_mac_get_survey,
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};