mac80211.c 85.1 KB
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/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
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 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
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 * in the file called COPYING.
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 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
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 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
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 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
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#include <linux/ip.h>
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#include <linux/if_arp.h>
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#include <linux/devcoredump.h>
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#include <net/mac80211.h>
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#include <net/ieee80211_radiotap.h>
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#include <net/tcp.h>
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#include "iwl-op-mode.h"
#include "iwl-io.h"
#include "mvm.h"
#include "sta.h"
#include "time-event.h"
#include "iwl-eeprom-parse.h"
#include "fw-api-scan.h"
#include "iwl-phy-db.h"
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#include "testmode.h"
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#include "iwl-fw-error-dump.h"
#include "iwl-prph.h"
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static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
	{
		.max = 1,
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		.types = BIT(NL80211_IFTYPE_STATION),
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	},
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	{
		.max = 1,
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		.types = BIT(NL80211_IFTYPE_AP) |
			BIT(NL80211_IFTYPE_P2P_CLIENT) |
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			BIT(NL80211_IFTYPE_P2P_GO),
	},
	{
		.max = 1,
		.types = BIT(NL80211_IFTYPE_P2P_DEVICE),
	},
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};

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

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

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

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

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

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

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

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

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

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

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

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

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

	if (!iwl_mvm_is_d0i3_supported(mvm))
		return true;

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

	return taken;
}

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

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

	return 0;
}

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

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

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

	/*
	 * Enable 11w if advertised by firmware and software crypto
	 * is not enabled (as the firmware will interpret some mgmt
	 * packets, so enabling it with software crypto isn't safe)
	 */
	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
	    !iwlwifi_mod_params.sw_crypto)
		hw->flags |= IEEE80211_HW_MFP_CAPABLE;

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

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

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

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

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

	/* Extract MAC address */
	memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
	hw->wiphy->addresses = mvm->addresses;
	hw->wiphy->n_addresses = 1;
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	/* Extract additional MAC addresses if available */
	num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
		min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;

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

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	iwl_mvm_reset_phy_ctxts(mvm);

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

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

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

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

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

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

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	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;

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

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#ifdef CONFIG_PM_SLEEP
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	if (iwl_mvm_is_d0i3_supported(mvm) &&
	    device_can_wakeup(mvm->trans->dev)) {
		mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
		hw->wiphy->wowlan = &mvm->wowlan;
	} else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
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	    mvm->trans->ops->d3_suspend &&
	    mvm->trans->ops->d3_resume &&
	    device_can_wakeup(mvm->trans->dev)) {
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		mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
				    WIPHY_WOWLAN_DISCONNECT |
				    WIPHY_WOWLAN_EAP_IDENTITY_REQ |
				    WIPHY_WOWLAN_RFKILL_RELEASE;
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		if (!iwlwifi_mod_params.sw_crypto)
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			mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
					     WIPHY_WOWLAN_GTK_REKEY_FAILURE |
					     WIPHY_WOWLAN_4WAY_HANDSHAKE;

		mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
		mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
		mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
		mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
		hw->wiphy->wowlan = &mvm->wowlan;
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	}
#endif

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

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

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

	return ret;
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}

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static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
			     struct ieee80211_sta *sta,
			     struct sk_buff *skb)
{
	struct iwl_mvm_sta *mvmsta;
	bool defer = false;

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

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

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

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

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

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

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Johannes Berg 已提交
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static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
			   struct ieee80211_tx_control *control,
			   struct sk_buff *skb)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
540 541 542
	struct ieee80211_sta *sta = control->sta;
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (void *)skb->data;
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Johannes Berg 已提交
543

544 545
	if (iwl_mvm_is_radio_killed(mvm)) {
		IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
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Johannes Berg 已提交
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		goto drop;
	}

549
	if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
550 551
	    !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
	    !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
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Johannes Berg 已提交
552 553
		goto drop;

554 555 556 557 558 559 560 561 562
	/* 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) {
563 564
		if (iwl_mvm_defer_tx(mvm, sta, skb))
			return;
565
		if (iwl_mvm_tx_skb(mvm, skb, sta))
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Johannes Berg 已提交
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			goto drop;
		return;
	}

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

577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594
static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
{
	if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
		return false;
	return true;
}

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

	/* enabled by default */
	return true;
}

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Johannes Berg 已提交
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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;
603
	bool tx_agg_ref = false;
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Johannes Berg 已提交
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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;

611
	/* return from D0i3 before starting a new Tx aggregation */
612 613 614 615 616 617
	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:
618
		/*
619 620 621 622 623 624
		 * 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.
625
		 */
626 627 628 629 630
		ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
		if (ret)
			return ret;

		tx_agg_ref = true;
631 632 633
		break;
	default:
		break;
634 635
	}

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Johannes Berg 已提交
636 637 638 639
	mutex_lock(&mvm->mutex);

	switch (action) {
	case IEEE80211_AMPDU_RX_START:
640
		if (!iwl_enable_rx_ampdu(mvm->cfg)) {
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Johannes Berg 已提交
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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:
650
		if (!iwl_enable_tx_ampdu(mvm->cfg)) {
651 652 653
			ret = -EINVAL;
			break;
		}
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Johannes Berg 已提交
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		ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
		break;
	case IEEE80211_AMPDU_TX_STOP_CONT:
657 658
		ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
		break;
J
Johannes Berg 已提交
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	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
661
		ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
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Johannes Berg 已提交
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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);

673 674 675 676 677 678 679
	/*
	 * If the tid is marked as started, we won't use it for offloaded
	 * traffic on the next D0i3 entry. It's safe to unref.
	 */
	if (tx_agg_ref)
		iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);

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Johannes Berg 已提交
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	return ret;
}

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

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

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

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

699
	mvmvif->phy_ctxt = NULL;
700
	memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
J
Johannes Berg 已提交
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}

703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745
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);
}

746
void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
747 748 749 750
{
	struct iwl_fw_error_dump_file *dump_file;
	struct iwl_fw_error_dump_data *dump_data;
	struct iwl_fw_error_dump_info *dump_info;
751
	struct iwl_mvm_dump_ptrs *fw_error_dump;
752 753 754 755 756 757 758 759
	const struct fw_img *img;
	u32 sram_len, sram_ofs;
	u32 file_len, rxf_len;
	unsigned long flags;
	int reg_val;

	lockdep_assert_held(&mvm->mutex);

760
	fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
761 762 763
	if (!fw_error_dump)
		return;

764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780
	img = &mvm->fw->img[mvm->cur_ucode];
	sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
	sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;

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

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

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

781
	dump_file = vzalloc(file_len);
782 783
	if (!dump_file) {
		kfree(fw_error_dump);
784
		return;
785
	}
786

787
	fw_error_dump->op_mode_ptr = dump_file;
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

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

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

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

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

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

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

830 831 832 833 834
	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);
835

836 837
	dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
		      GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
838 839
}

J
Johannes Berg 已提交
840 841
static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
{
842 843 844 845 846 847
	/* 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);
848

J
Johannes Berg 已提交
849 850 851
	iwl_trans_stop_device(mvm->trans);

	mvm->scan_status = IWL_MVM_SCAN_NONE;
852
	mvm->ps_disabled = false;
853
	mvm->calibrating = false;
J
Johannes Berg 已提交
854 855 856 857 858 859 860 861

	/* 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);

862
	mvm->p2p_device_vif = NULL;
863
	mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
864 865

	iwl_mvm_reset_phy_ctxts(mvm);
J
Johannes Berg 已提交
866 867
	memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
	memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
868 869 870 871 872 873
	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
874 875 876

	ieee80211_wake_queues(mvm->hw);

877 878 879 880
	/* 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);

881 882 883
	/* clear any stale d0i3 state */
	clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);

J
Johannes Berg 已提交
884
	mvm->vif_count = 0;
885
	mvm->rx_ba_sessions = 0;
J
Johannes Berg 已提交
886 887
}

888
int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
889 890 891
{
	int ret;

892
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
893 894 895 896 897 898

	/* 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);
899 900 901 902 903 904 905 906 907 908

	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);
	}

909 910 911 912 913 914 915 916 917 918
	return ret;
}

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

	mutex_lock(&mvm->mutex);
	ret = __iwl_mvm_mac_start(mvm);
J
Johannes Berg 已提交
919 920 921 922 923
	mutex_unlock(&mvm->mutex);

	return ret;
}

924
static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
925 926 927 928 929 930
{
	int ret;

	mutex_lock(&mvm->mutex);

	clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
931
	iwl_mvm_d0i3_enable_tx(mvm, NULL);
932
	ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
933 934 935 936
	if (ret)
		IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
			ret);

937 938 939
	/* allow transport/FW low power modes */
	iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);

J
Johannes Berg 已提交
940 941 942
	mutex_unlock(&mvm->mutex);
}

943 944 945 946 947 948 949 950 951 952 953 954 955 956 957
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:
		break;
	}
}

958
void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
J
Johannes Berg 已提交
959
{
960
	lockdep_assert_held(&mvm->mutex);
961 962 963 964

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

J
Johannes Berg 已提交
965 966 967 968 969 970 971 972 973 974 975 976 977 978
	/* 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 */
979
	iwl_mvm_del_aux_sta(mvm);
J
Johannes Berg 已提交
980

981
	mvm->ucode_loaded = false;
982
}
983

984 985 986 987 988 989
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);
990
	flush_work(&mvm->fw_error_dump_wk);
991 992 993

	mutex_lock(&mvm->mutex);
	__iwl_mvm_mac_stop(mvm);
J
Johannes Berg 已提交
994 995 996 997 998 999 1000 1001 1002
	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);
}

1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016
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;
}

1017 1018 1019 1020 1021 1022 1023 1024 1025
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
1026
	return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1027 1028 1029 1030
				    sizeof(reduce_txpwr_cmd),
				    &reduce_txpwr_cmd);
}

J
Johannes Berg 已提交
1031 1032 1033 1034 1035 1036 1037
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;

1038 1039 1040 1041 1042 1043 1044 1045 1046
	/*
	 * 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
1047 1048 1049 1050 1051 1052 1053 1054
	/*
	 * 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);

1055
	/* Allocate resources for the MAC context, and add it to the fw  */
J
Johannes Berg 已提交
1056 1057 1058 1059
	ret = iwl_mvm_mac_ctxt_init(mvm, vif);
	if (ret)
		goto out_unlock;

1060
	/* Counting number of interfaces is needed for legacy PM */
1061 1062 1063
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count++;

J
Johannes Berg 已提交
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
	/*
	 * 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
1075 1076
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1077
		ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1078 1079 1080 1081 1082
		if (ret) {
			IWL_ERR(mvm, "Failed to allocate bcast sta\n");
			goto out_release;
		}

1083
		iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1084 1085 1086 1087 1088 1089 1090
		goto out_unlock;
	}

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

1091
	ret = iwl_mvm_power_update_mac(mvm);
1092 1093
	if (ret)
		goto out_release;
J
Johannes Berg 已提交
1094

1095
	/* beacon filtering */
E
Emmanuel Grumbach 已提交
1096
	ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1097 1098 1099
	if (ret)
		goto out_remove_mac;

1100
	if (!mvm->bf_allowed_vif &&
1101
	    vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1102
		mvm->bf_allowed_vif = mvmvif;
1103 1104
		vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
				     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1105 1106
	}

J
Johannes Berg 已提交
1107 1108 1109 1110 1111 1112 1113
	/*
	 * 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) {

1114 1115 1116
		mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
		if (!mvmvif->phy_ctxt) {
			ret = -ENOSPC;
1117
			goto out_free_bf;
1118
		}
J
Johannes Berg 已提交
1119

1120
		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1121 1122
		ret = iwl_mvm_binding_add_vif(mvm, vif);
		if (ret)
1123
			goto out_unref_phy;
J
Johannes Berg 已提交
1124

1125
		ret = iwl_mvm_add_bcast_sta(mvm, vif);
J
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1126 1127 1128 1129 1130 1131 1132 1133
		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;
	}

1134
	iwl_mvm_vif_dbgfs_register(mvm, vif);
J
Johannes Berg 已提交
1135 1136 1137 1138
	goto out_unlock;

 out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
1139
 out_unref_phy:
1140
	iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1141 1142 1143
 out_free_bf:
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1144 1145
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1146
	}
J
Johannes Berg 已提交
1147 1148 1149 1150
 out_remove_mac:
	mvmvif->phy_ctxt = NULL;
	iwl_mvm_mac_ctxt_remove(mvm, vif);
 out_release:
1151 1152
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count--;
1153

J
Johannes Berg 已提交
1154 1155 1156 1157
	iwl_mvm_mac_ctxt_release(mvm, vif);
 out_unlock:
	mutex_unlock(&mvm->mutex);

1158 1159
	iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);

J
Johannes Berg 已提交
1160 1161 1162
	return ret;
}

1163 1164
static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif)
J
Johannes Berg 已提交
1165
{
1166
	u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
J
Johannes Berg 已提交
1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185

	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
1186
		 * triggered. Flush it.
J
Johannes Berg 已提交
1187 1188 1189
		 */
		flush_work(&mvm->sta_drained_wk);
	}
1190 1191 1192 1193 1194 1195 1196 1197 1198
}

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
1199 1200 1201

	mutex_lock(&mvm->mutex);

1202 1203
	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
1204 1205
		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1206 1207
	}

1208 1209
	iwl_mvm_vif_dbgfs_clean(mvm, vif);

J
Johannes Berg 已提交
1210 1211
	/*
	 * For AP/GO interface, the tear down of the resources allocated to the
1212
	 * interface is be handled as part of the stop_ap flow.
J
Johannes Berg 已提交
1213
	 */
J
Johannes Berg 已提交
1214 1215
	if (vif->type == NL80211_IFTYPE_AP ||
	    vif->type == NL80211_IFTYPE_ADHOC) {
1216 1217 1218 1219 1220 1221
#ifdef CONFIG_NL80211_TESTMODE
		if (vif == mvm->noa_vif) {
			mvm->noa_vif = NULL;
			mvm->noa_duration = 0;
		}
#endif
1222
		iwl_mvm_dealloc_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1223 1224 1225 1226 1227
		goto out_release;
	}

	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		mvm->p2p_device_vif = NULL;
1228
		iwl_mvm_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1229
		iwl_mvm_binding_remove_vif(mvm, vif);
1230
		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
J
Johannes Berg 已提交
1231 1232 1233
		mvmvif->phy_ctxt = NULL;
	}

1234
	if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
J
Johannes Berg 已提交
1235
		mvm->vif_count--;
1236

1237
	iwl_mvm_power_update_mac(mvm);
J
Johannes Berg 已提交
1238 1239 1240 1241 1242 1243 1244 1245
	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)
1246
{
J
Johannes Berg 已提交
1247 1248 1249
	return 0;
}

1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274
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);

1275
	ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1276 1277 1278 1279 1280 1281 1282 1283
	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,
1284 1285
	};

1286 1287 1288 1289 1290
	lockdep_assert_held(&mvm->mutex);

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

1291
	ieee80211_iterate_active_interfaces_atomic(
1292 1293
		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
		iwl_mvm_mc_iface_iterator, &iter_data);
1294 1295
}

1296 1297
static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
				     struct netdev_hw_addr_list *mc_list)
J
Johannes Berg 已提交
1298
{
1299 1300 1301
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mcast_filter_cmd *cmd;
	struct netdev_hw_addr *addr;
1302 1303
	int addr_count;
	bool pass_all;
1304 1305
	int len;

1306 1307 1308 1309
	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)
1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330
		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
1331 1332 1333 1334 1335 1336 1337
}

static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
				     unsigned int changed_flags,
				     unsigned int *total_flags,
				     u64 multicast)
{
1338 1339
	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
1340

1341
	mutex_lock(&mvm->mutex);
1342

1343 1344 1345
	/* replace previous configuration */
	kfree(mvm->mcast_filter_cmd);
	mvm->mcast_filter_cmd = cmd;
1346

1347 1348
	if (!cmd)
		goto out;
1349

1350 1351 1352 1353
	iwl_mvm_recalc_multicast(mvm);
out:
	mutex_unlock(&mvm->mutex);
	*total_flags = 0;
1354 1355
}

1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378
#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;

1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394
		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;
1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413
		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];

1414 1415 1416 1417 1418 1419
	/*
	 * enable filtering only for associated stations, but not for P2P
	 * Clients
	 */
	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
	    !vif->bss_conf.assoc)
1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453
		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++;
	}
}

1454 1455
bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
				    struct iwl_bcast_filter_cmd *cmd)
1456 1457 1458
{
	struct iwl_bcast_iter_data iter_data = {
		.mvm = mvm,
1459
		.cmd = cmd,
1460 1461
	};

1462 1463 1464
	if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
		return false;

1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478
	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
1479 1480 1481

	/* if no filters are configured, do nothing */
	if (!mvm->bcast_filters)
1482
		return false;
1483 1484 1485 1486 1487 1488

	/* 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);

1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501
	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
1502
	return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1503 1504 1505 1506 1507 1508 1509 1510 1511 1512
				    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
1513 1514 1515 1516 1517 1518 1519 1520
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;

1521 1522 1523 1524 1525 1526 1527 1528
	/*
	 * 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);

1529 1530 1531 1532 1533 1534 1535 1536 1537 1538
	/*
	 * 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
1539 1540 1541
	if (ret)
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);

1542 1543 1544 1545
	/* 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
1546 1547 1548
	if (changes & BSS_CHANGED_ASSOC) {
		if (bss_conf->assoc) {
			/* add quota for this interface */
1549
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1550 1551 1552 1553
			if (ret) {
				IWL_ERR(mvm, "failed to update quotas\n");
				return;
			}
1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572

			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,
1573
							5 * dur, false);
1574
			}
1575 1576

			iwl_mvm_sf_update(mvm, vif, false);
1577
			iwl_mvm_power_vif_assoc(mvm, vif);
1578
			if (vif->p2p) {
1579
				iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1580 1581 1582 1583
				iwl_mvm_update_smps(mvm, vif,
						    IWL_MVM_SMPS_REQ_PROT,
						    IEEE80211_SMPS_DYNAMIC);
			}
J
Johannes Berg 已提交
1584
		} else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1585 1586 1587 1588 1589 1590 1591
			/*
			 * 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
1592 1593 1594 1595
			/* 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");
1596 1597 1598

			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
1599 1600
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
			/* remove quota for this interface */
1601
			ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1602 1603
			if (ret)
				IWL_ERR(mvm, "failed to update quotas\n");
1604 1605 1606

			if (vif->p2p)
				iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1607 1608 1609 1610 1611 1612 1613

			/* 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
1614
		}
1615

1616
		iwl_mvm_recalc_multicast(mvm);
1617
		iwl_mvm_configure_bcast_filter(mvm, vif);
1618

1619 1620 1621
		/* reset rssi values */
		mvmvif->bf_data.ave_beacon_signal = 0;

1622
		iwl_mvm_bt_coex_vif_change(mvm);
1623 1624
		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
				    IEEE80211_SMPS_AUTOMATIC);
1625
	} else if (changes & BSS_CHANGED_BEACON_INFO) {
1626 1627 1628 1629 1630 1631
		/*
		 * 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
1632
	}
1633 1634 1635 1636 1637 1638

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

1639 1640 1641 1642 1643 1644
	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");
	}

1645 1646 1647 1648 1649
	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);
	}
1650 1651

	if (changes & BSS_CHANGED_CQM) {
1652
		IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1653 1654
		/* reset cqm events tracking */
		mvmvif->bf_data.last_cqm_event = 0;
1655 1656 1657 1658 1659 1660
		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");
		}
1661
	}
1662 1663

	if (changes & BSS_CHANGED_ARP_FILTER) {
1664
		IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1665 1666
		iwl_mvm_configure_bcast_filter(mvm, vif);
	}
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1667 1668
}

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1669 1670
static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
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1671 1672 1673 1674 1675
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

1676 1677 1678 1679 1680 1681 1682 1683
	/*
	 * iwl_mvm_mac_ctxt_add() might read directly from the device
	 * (the system time), so make sure it is available.
	 */
	ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
	if (ret)
		return ret;

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1684 1685 1686 1687 1688 1689 1690
	mutex_lock(&mvm->mutex);

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

1691 1692 1693 1694 1695 1696 1697
	/*
	 * 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);

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1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709
	/* 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 */
1710
	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
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Johannes Berg 已提交
1711 1712 1713
	if (ret)
		goto out_unbind;

1714 1715 1716
	/* must be set before quota calculations */
	mvmvif->ap_ibss_active = true;

1717
	/* power updated needs to be done before quotas */
1718
	iwl_mvm_power_update_mac(mvm);
1719

1720
	ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
1721
	if (ret)
1722
		goto out_quota_failed;
J
Johannes Berg 已提交
1723

J
Johannes Berg 已提交
1724
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
Johannes Berg 已提交
1725
	if (vif->p2p && mvm->p2p_device_vif)
1726
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
1727

1728 1729
	iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);

1730
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
1731

1732 1733 1734 1735
	/* 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
1736 1737 1738
	mutex_unlock(&mvm->mutex);
	return 0;

1739
out_quota_failed:
1740
	iwl_mvm_power_update_mac(mvm);
1741
	mvmvif->ap_ibss_active = false;
1742
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1743 1744 1745 1746 1747 1748
out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
out_remove:
	iwl_mvm_mac_ctxt_remove(mvm, vif);
out_unlock:
	mutex_unlock(&mvm->mutex);
1749
	iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
J
Johannes Berg 已提交
1750 1751 1752
	return ret;
}

J
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1753 1754
static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
				 struct ieee80211_vif *vif)
J
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1755 1756 1757 1758
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

1759 1760
	iwl_mvm_prepare_mac_removal(mvm, vif);

J
Johannes Berg 已提交
1761 1762
	mutex_lock(&mvm->mutex);

1763
	/* Handle AP stop while in CSA */
1764 1765 1766
	if (rcu_access_pointer(mvm->csa_vif) == vif) {
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
1767
		RCU_INIT_POINTER(mvm->csa_vif, NULL);
1768
	}
1769

1770 1771 1772 1773 1774
	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
1775
	mvmvif->ap_ibss_active = false;
1776
	mvm->ap_last_beacon_gp2 = 0;
J
Johannes Berg 已提交
1777

1778
	iwl_mvm_bt_coex_vif_change(mvm);
E
Emmanuel Grumbach 已提交
1779

1780 1781
	iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);

J
Johannes Berg 已提交
1782
	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
J
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1783
	if (vif->p2p && mvm->p2p_device_vif)
1784
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
J
Johannes Berg 已提交
1785

1786
	iwl_mvm_update_quotas(mvm, NULL);
1787
	iwl_mvm_send_rm_bcast_sta(mvm, vif);
J
Johannes Berg 已提交
1788
	iwl_mvm_binding_remove_vif(mvm, vif);
1789

1790
	iwl_mvm_power_update_mac(mvm);
1791

J
Johannes Berg 已提交
1792 1793 1794 1795 1796
	iwl_mvm_mac_ctxt_remove(mvm, vif);

	mutex_unlock(&mvm->mutex);
}

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1797 1798 1799 1800 1801
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
1802
{
1803
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1804

1805 1806 1807 1808
	/* Changes will be applied when the AP/IBSS is started */
	if (!mvmvif->ap_ibss_active)
		return;

1809
	if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1810
		       BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1811
	    iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1812
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1813

J
Johannes Berg 已提交
1814
	/* Need to send a new beacon template to the FW */
1815 1816 1817
	if (changes & BSS_CHANGED_BEACON &&
	    iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
		IWL_WARN(mvm, "Failed updating beacon data\n");
1818 1819 1820 1821 1822 1823 1824

	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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1825 1826 1827 1828 1829 1830 1831 1832 1833
}

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);

1834 1835 1836 1837 1838 1839 1840 1841
	/*
	 * 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
1842 1843
	mutex_lock(&mvm->mutex);

1844
	if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1845
		iwl_mvm_scan_offload_stop(mvm, true);
1846

J
Johannes Berg 已提交
1847 1848 1849 1850 1851
	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
1852 1853
	case NL80211_IFTYPE_ADHOC:
		iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
J
Johannes Berg 已提交
1854 1855 1856 1857 1858 1859 1860
		break;
	default:
		/* shouldn't happen */
		WARN_ON_ONCE(1);
	}

	mutex_unlock(&mvm->mutex);
1861
	iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
J
Johannes Berg 已提交
1862 1863
}

1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904
static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
					  enum iwl_scan_status scan_type)
{
	int ret;
	bool wait_for_handlers = false;

	mutex_lock(&mvm->mutex);

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

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

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

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

	return ret;
}
J
Johannes Berg 已提交
1905 1906
static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
1907
			       struct ieee80211_scan_request *hw_req)
J
Johannes Berg 已提交
1908 1909
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1910
	struct cfg80211_scan_request *req = &hw_req->req;
J
Johannes Berg 已提交
1911 1912
	int ret;

1913 1914
	if (req->n_channels == 0 ||
	    req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
J
Johannes Berg 已提交
1915 1916
		return -EINVAL;

1917 1918 1919 1920
	ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
	if (ret)
		return ret;

J
Johannes Berg 已提交
1921 1922
	mutex_lock(&mvm->mutex);

1923
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
J
Johannes Berg 已提交
1924
		ret = -EBUSY;
1925 1926
		goto out;
	}
J
Johannes Berg 已提交
1927

1928 1929
	iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);

1930 1931 1932 1933 1934
	if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
		ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
	else
		ret = iwl_mvm_scan_request(mvm, vif, req);

1935 1936 1937
	if (ret)
		iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
out:
J
Johannes Berg 已提交
1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955
	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,
1956
				  struct ieee80211_sta *sta, u16 tids,
J
Johannes Berg 已提交
1957 1958 1959 1960 1961 1962
				  int num_frames,
				  enum ieee80211_frame_release_type reason,
				  bool more_data)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

1963
	/* Called when we need to transmit (a) frame(s) from mac80211 */
J
Johannes Berg 已提交
1964

1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981
	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
1982 1983 1984 1985 1986 1987 1988 1989
}

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);
1990
	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1991
	int tid;
J
Johannes Berg 已提交
1992 1993 1994

	switch (cmd) {
	case STA_NOTIFY_SLEEP:
1995
		if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
J
Johannes Berg 已提交
1996
			ieee80211_sta_block_awake(hw, sta, true);
1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
		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
2010 2011 2012 2013 2014 2015 2016
		/*
		 * 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:
2017
		if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
J
Johannes Berg 已提交
2018
			break;
2019
		iwl_mvm_sta_modify_ps_wake(mvm, sta);
J
Johannes Berg 已提交
2020 2021 2022 2023 2024 2025
		break;
	default:
		break;
	}
}

2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047
static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif,
				       struct ieee80211_sta *sta)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;

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

J
Johannes Berg 已提交
2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070
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) {
2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085
		/*
		 * 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;
		}
2086 2087 2088

		if (sta->tdls &&
		    (vif->p2p ||
2089 2090
		     iwl_mvm_tdls_sta_count(mvm, NULL) ==
						IWL_MVM_TDLS_STA_COUNT ||
2091 2092 2093 2094 2095 2096
		     iwl_mvm_phy_ctx_count(mvm) > 1)) {
			IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
			ret = -EBUSY;
			goto out_unlock;
		}

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Johannes Berg 已提交
2097
		ret = iwl_mvm_add_sta(mvm, vif, sta);
2098 2099
		if (sta->tdls && ret == 0)
			iwl_mvm_recalc_tdls_state(mvm, vif, true);
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Johannes Berg 已提交
2100 2101
	} else if (old_state == IEEE80211_STA_NONE &&
		   new_state == IEEE80211_STA_AUTH) {
2102 2103 2104 2105 2106
		/*
		 * 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;
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Johannes Berg 已提交
2107 2108 2109
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_ASSOC) {
2110 2111 2112
		ret = iwl_mvm_update_sta(mvm, vif, sta);
		if (ret == 0)
			iwl_mvm_rs_rate_init(mvm, sta,
2113 2114
					     mvmvif->phy_ctxt->channel->band,
					     true);
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Johannes Berg 已提交
2115 2116
	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTHORIZED) {
2117 2118 2119 2120 2121

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

2122
		/* enable beacon filtering */
2123
		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
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Johannes Berg 已提交
2124 2125 2126
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTHORIZED &&
		   new_state == IEEE80211_STA_ASSOC) {
2127
		/* disable beacon filtering */
E
Emmanuel Grumbach 已提交
2128
		WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
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Johannes Berg 已提交
2129 2130 2131 2132 2133 2134 2135 2136 2137 2138
		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);
2139 2140
		if (sta->tdls)
			iwl_mvm_recalc_tdls_state(mvm, vif, false);
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Johannes Berg 已提交
2141 2142 2143
	} else {
		ret = -EIO;
	}
2144
 out_unlock:
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2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158
	mutex_unlock(&mvm->mutex);

	return ret;
}

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

	mvm->rts_threshold = value;

	return 0;
}

2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169
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);
}

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Johannes Berg 已提交
2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186
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);
2187
		ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
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Johannes Berg 已提交
2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205
		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;

2206 2207 2208 2209 2210 2211 2212
	/*
	 * 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;

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Johannes Berg 已提交
2213 2214
	mutex_lock(&mvm->mutex);
	/* Try really hard to protect the session and hear a beacon */
2215
	iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
J
Johannes Berg 已提交
2216
	mutex_unlock(&mvm->mutex);
2217 2218

	iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
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Johannes Berg 已提交
2219 2220
}

2221 2222 2223
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
2224
					struct ieee80211_scan_ies *ies)
2225 2226 2227 2228
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

2229 2230 2231 2232
	ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
	if (ret)
		return ret;

2233 2234
	mutex_lock(&mvm->mutex);

2235 2236 2237 2238 2239 2240 2241
	/* Newest FW fixes sched scan while connected on another interface */
	if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
		if (!vif->bss_conf.idle) {
			ret = -EBUSY;
			goto out;
		}
	} else if (!iwl_mvm_is_idle(mvm)) {
2242 2243 2244 2245
		ret = -EBUSY;
		goto out;
	}

2246
	if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2247 2248 2249 2250 2251 2252
		ret = -EBUSY;
		goto out;
	}

	mvm->scan_status = IWL_MVM_SCAN_SCHED;

2253
	ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2254
	if (ret)
2255
		mvm->scan_status = IWL_MVM_SCAN_NONE;
2256 2257 2258 2259 2260
out:
	mutex_unlock(&mvm->mutex);
	return ret;
}

2261 2262
static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
				       struct ieee80211_vif *vif)
2263 2264
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2265
	int ret;
2266 2267

	mutex_lock(&mvm->mutex);
2268
	ret = iwl_mvm_scan_offload_stop(mvm, false);
2269
	mutex_unlock(&mvm->mutex);
2270
	iwl_mvm_wait_for_async_handlers(mvm);
2271

2272
	return ret;
2273 2274
}

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Johannes Berg 已提交
2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307
static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
			       enum set_key_cmd cmd,
			       struct ieee80211_vif *vif,
			       struct ieee80211_sta *sta,
			       struct ieee80211_key_conf *key)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

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

	switch (key->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
		key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
		/* fall-through */
	case WLAN_CIPHER_SUITE_CCMP:
		key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
		break;
	case WLAN_CIPHER_SUITE_AES_CMAC:
		WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
		break;
	case WLAN_CIPHER_SUITE_WEP40:
	case WLAN_CIPHER_SUITE_WEP104:
		/*
		 * Support for TX only, at least for now, so accept
		 * the key and do nothing else. Then mac80211 will
		 * pass it for TX but we don't have to use it for RX.
		 */
		return 0;
	default:
2308 2309 2310 2311 2312 2313
		/* 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;
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Johannes Berg 已提交
2314 2315 2316 2317 2318 2319
	}

	mutex_lock(&mvm->mutex);

	switch (cmd) {
	case SET_KEY:
J
Johannes Berg 已提交
2320 2321 2322 2323 2324 2325 2326
		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.
			 */
2327 2328 2329 2330 2331
			ret = 0;
			key->hw_key_idx = STA_KEY_IDX_INVALID;
			break;
		}

J
Johannes Berg 已提交
2332 2333 2334 2335 2336 2337 2338 2339
		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
			 */
2340
			key->hw_key_idx = STA_KEY_IDX_INVALID;
J
Johannes Berg 已提交
2341 2342 2343 2344 2345
			ret = 0;
		}

		break;
	case DISABLE_KEY:
2346 2347 2348 2349 2350
		if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
			ret = 0;
			break;
		}

J
Johannes Berg 已提交
2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369
		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
2370 2371 2372
	if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
		return;

J
Johannes Berg 已提交
2373 2374 2375 2376
	iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
}


2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441
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);

2442 2443 2444 2445 2446 2447 2448 2449 2450
	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;
	}

2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494
	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
2495 2496 2497
static int iwl_mvm_roc(struct ieee80211_hw *hw,
		       struct ieee80211_vif *vif,
		       struct ieee80211_channel *channel,
2498 2499
		       int duration,
		       enum ieee80211_roc_type type)
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Johannes Berg 已提交
2500 2501
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2502
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
J
Johannes Berg 已提交
2503
	struct cfg80211_chan_def chandef;
2504 2505 2506 2507 2508
	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
2509

2510 2511
	mutex_lock(&mvm->mutex);

2512 2513 2514 2515 2516
	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
		/* Use aux roc framework (HS20) */
		ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
					       vif, duration);
2517
		goto out_unlock;
2518 2519 2520 2521 2522
	case NL80211_IFTYPE_P2P_DEVICE:
		/* handle below */
		break;
	default:
		IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2523 2524
		ret = -EINVAL;
		goto out_unlock;
J
Johannes Berg 已提交
2525 2526
	}

2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558
	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
2559 2560
	cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);

2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606
	/*
	 * 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
2607
	/* Schedule the time events */
2608
	ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
J
Johannes Berg 已提交
2609

2610
out_unlock:
J
Johannes Berg 已提交
2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629
	mutex_unlock(&mvm->mutex);
	IWL_DEBUG_MAC80211(mvm, "leave\n");
	return ret;
}

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

	IWL_DEBUG_MAC80211(mvm, "enter\n");

	mutex_lock(&mvm->mutex);
	iwl_mvm_stop_p2p_roc(mvm);
	mutex_unlock(&mvm->mutex);

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

2630 2631
static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
				 struct ieee80211_chanctx_conf *ctx)
J
Johannes Berg 已提交
2632
{
2633 2634
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt;
J
Johannes Berg 已提交
2635 2636
	int ret;

2637 2638
	lockdep_assert_held(&mvm->mutex);

2639
	IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2640 2641 2642 2643 2644 2645

	phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
	if (!phy_ctxt) {
		ret = -ENOSPC;
		goto out;
	}
J
Johannes Berg 已提交
2646

2647
	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2648 2649
				       ctx->rx_chains_static,
				       ctx->rx_chains_dynamic);
2650 2651 2652 2653 2654
	if (ret) {
		IWL_ERR(mvm, "Failed to add PHY context\n");
		goto out;
	}

2655
	iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2656 2657
	*phy_ctxt_id = phy_ctxt->id;
out:
2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668
	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
2669
	mutex_unlock(&mvm->mutex);
2670

J
Johannes Berg 已提交
2671 2672 2673
	return ret;
}

2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684
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
2685 2686 2687 2688 2689 2690
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);
2691
	__iwl_mvm_remove_chanctx(mvm, ctx);
J
Johannes Berg 已提交
2692 2693 2694 2695 2696 2697 2698 2699
	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);
2700 2701
	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
2702

2703 2704 2705
	if (WARN_ONCE((phy_ctxt->ref > 1) &&
		      (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
				   IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2706 2707
				   IEEE80211_CHANCTX_CHANGE_RADAR |
				   IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2708 2709 2710 2711
		      "Cannot change PHY. Ref=%d, changed=0x%X\n",
		      phy_ctxt->ref, changed))
		return;

J
Johannes Berg 已提交
2712
	mutex_lock(&mvm->mutex);
2713
	iwl_mvm_bt_coex_vif_change(mvm);
2714
	iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
J
Johannes Berg 已提交
2715 2716 2717 2718 2719
				 ctx->rx_chains_static,
				 ctx->rx_chains_dynamic);
	mutex_unlock(&mvm->mutex);
}

2720 2721
static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif,
2722 2723
					struct ieee80211_chanctx_conf *ctx,
					bool switching_chanctx)
J
Johannes Berg 已提交
2724
{
2725 2726
	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
2727 2728 2729
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

2730
	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
2731

2732
	mvmvif->phy_ctxt = phy_ctxt;
J
Johannes Berg 已提交
2733 2734 2735

	switch (vif->type) {
	case NL80211_IFTYPE_AP:
2736 2737 2738 2739 2740
		/* Unless it's a CSA flow we have nothing to do here */
		if (vif->csa_active) {
			mvmvif->ap_ibss_active = true;
			break;
		}
J
Johannes Berg 已提交
2741
	case NL80211_IFTYPE_ADHOC:
J
Johannes Berg 已提交
2742 2743
		/*
		 * The AP binding flow is handled as part of the start_ap flow
J
Johannes Berg 已提交
2744
		 * (in bss_info_changed), similarly for IBSS.
J
Johannes Berg 已提交
2745 2746
		 */
		ret = 0;
2747
		goto out;
J
Johannes Berg 已提交
2748
	case NL80211_IFTYPE_STATION:
2749
		break;
J
Johannes Berg 已提交
2750
	case NL80211_IFTYPE_MONITOR:
2751 2752
		/* always disable PS when a monitor interface is active */
		mvmvif->ps_disabled = true;
J
Johannes Berg 已提交
2753 2754 2755
		break;
	default:
		ret = -EINVAL;
2756
		goto out;
J
Johannes Berg 已提交
2757 2758 2759 2760
	}

	ret = iwl_mvm_binding_add_vif(mvm, vif);
	if (ret)
2761
		goto out;
J
Johannes Berg 已提交
2762 2763

	/*
2764 2765 2766
	 * Power state must be updated before quotas,
	 * otherwise fw will complain.
	 */
2767
	iwl_mvm_power_update_mac(mvm);
2768 2769

	/* Setting the quota at this stage is only required for monitor
J
Johannes Berg 已提交
2770 2771 2772 2773
	 * interfaces. For the other types, the bss_info changed flow
	 * will handle quota settings.
	 */
	if (vif->type == NL80211_IFTYPE_MONITOR) {
2774
		mvmvif->monitor_active = true;
2775
		ret = iwl_mvm_update_quotas(mvm, NULL);
J
Johannes Berg 已提交
2776 2777 2778 2779
		if (ret)
			goto out_remove_binding;
	}

2780
	/* Handle binding during CSA */
2781 2782
	if ((vif->type == NL80211_IFTYPE_AP) ||
	    (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2783
		iwl_mvm_update_quotas(mvm, NULL);
2784
		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2785 2786
	}

2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799
	if (vif->csa_active && vif->type == NL80211_IFTYPE_STATION) {
		struct iwl_mvm_sta *mvmsta;

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

		if (WARN_ON(!mvmsta))
			goto out;

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

2800
	goto out;
J
Johannes Berg 已提交
2801

2802
out_remove_binding:
J
Johannes Berg 已提交
2803
	iwl_mvm_binding_remove_vif(mvm, vif);
2804
	iwl_mvm_power_update_mac(mvm);
2805
out:
J
Johannes Berg 已提交
2806 2807 2808 2809
	if (ret)
		mvmvif->phy_ctxt = NULL;
	return ret;
}
2810 2811 2812
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
2813 2814
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2815
	int ret;
J
Johannes Berg 已提交
2816 2817

	mutex_lock(&mvm->mutex);
2818
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2819 2820 2821 2822 2823 2824 2825
	mutex_unlock(&mvm->mutex);

	return ret;
}

static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
					   struct ieee80211_vif *vif,
2826 2827
					   struct ieee80211_chanctx_conf *ctx,
					   bool switching_chanctx)
2828 2829
{
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2830
	struct ieee80211_vif *disabled_vif = NULL;
2831
	struct iwl_mvm_sta *mvmsta;
2832 2833

	lockdep_assert_held(&mvm->mutex);
J
Johannes Berg 已提交
2834 2835 2836 2837

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

	switch (vif->type) {
J
Johannes Berg 已提交
2838
	case NL80211_IFTYPE_ADHOC:
2839
		goto out;
J
Johannes Berg 已提交
2840
	case NL80211_IFTYPE_MONITOR:
2841
		mvmvif->monitor_active = false;
2842
		mvmvif->ps_disabled = false;
J
Johannes Berg 已提交
2843
		break;
2844 2845 2846
	case NL80211_IFTYPE_AP:
		/* This part is triggered only during CSA */
		if (!vif->csa_active || !mvmvif->ap_ibss_active)
2847
			goto out;
2848

2849 2850 2851 2852 2853 2854
		/* 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);

2855
		mvmvif->ap_ibss_active = false;
2856 2857 2858 2859 2860 2861 2862
		break;
	case NL80211_IFTYPE_STATION:
		if (!switching_chanctx)
			break;

		disabled_vif = vif;

2863 2864 2865 2866 2867 2868
		mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
							  mvmvif->ap_sta_id);

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

2869
		iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2870
		break;
J
Johannes Berg 已提交
2871 2872 2873 2874
	default:
		break;
	}

2875
	iwl_mvm_update_quotas(mvm, disabled_vif);
2876
	iwl_mvm_binding_remove_vif(mvm, vif);
2877

2878
out:
2879
	mvmvif->phy_ctxt = NULL;
2880
	iwl_mvm_power_update_mac(mvm);
2881 2882 2883 2884 2885 2886 2887 2888 2889
}

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);
2890
	__iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
J
Johannes Berg 已提交
2891 2892 2893
	mutex_unlock(&mvm->mutex);
}

2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906
static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
				      struct ieee80211_vif_chanctx_switch *vifs,
				      int n_vifs,
				      enum ieee80211_chanctx_switch_mode mode)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

	/* we only support SWAP_CONTEXTS and with a single-vif right now */
	if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
		return -EOPNOTSUPP;

	mutex_lock(&mvm->mutex);
2907
	__iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2908 2909 2910 2911 2912 2913 2914 2915
	__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;
	}

2916 2917
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
					   true);
2918 2919 2920 2921 2922 2923
	if (ret) {
		IWL_ERR(mvm,
			"failed to assign new_ctx during channel switch\n");
		goto out_remove;
	}

2924 2925 2926 2927
	/* 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);

2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939
	goto out;

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

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

2940 2941
	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
					   true);
2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957
	if (ret) {
		IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
		goto out_restart;
	}

	goto out;

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

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

J
Johannes Berg 已提交
2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972
static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
			   struct ieee80211_sta *sta,
			   bool set)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;

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

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

2973 2974 2975 2976
#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 },
2977
	[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008
};

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;

3009
		return iwl_mvm_update_quotas(mvm, NULL);
3010 3011 3012 3013 3014 3015 3016 3017
	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
3018 3019
			return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
		return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039
	}

	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

3040 3041 3042 3043 3044
static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
					  struct ieee80211_vif *vif,
					  struct cfg80211_chan_def *chandef)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3045
	struct ieee80211_vif *csa_vif;
3046 3047

	mutex_lock(&mvm->mutex);
3048 3049 3050 3051

	csa_vif = rcu_dereference_protected(mvm->csa_vif,
					    lockdep_is_held(&mvm->mutex));
	if (WARN(csa_vif && csa_vif->csa_active,
3052 3053 3054 3055 3056
		 "Another CSA is already in progress"))
		goto out_unlock;

	IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
			   chandef->center_freq1);
3057
	rcu_assign_pointer(mvm->csa_vif, vif);
3058 3059 3060 3061 3062

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

3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076
static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif, u32 queues, bool drop)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	struct iwl_mvm_vif *mvmvif;
	struct iwl_mvm_sta *mvmsta;

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

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

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

		/* this can take a while, and we may need/want other operations
		 * to succeed while doing this, so do it without the mutex held
		 */
		iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_queue_msk);
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	}
}

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const struct ieee80211_ops iwl_mvm_hw_ops = {
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	.tx = iwl_mvm_mac_tx,
	.ampdu_action = iwl_mvm_mac_ampdu_action,
	.start = iwl_mvm_mac_start,
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	.reconfig_complete = iwl_mvm_mac_reconfig_complete,
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	.stop = iwl_mvm_mac_stop,
	.add_interface = iwl_mvm_mac_add_interface,
	.remove_interface = iwl_mvm_mac_remove_interface,
	.config = iwl_mvm_mac_config,
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	.prepare_multicast = iwl_mvm_prepare_multicast,
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	.configure_filter = iwl_mvm_configure_filter,
	.bss_info_changed = iwl_mvm_bss_info_changed,
	.hw_scan = iwl_mvm_mac_hw_scan,
	.cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
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	.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,
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	.release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
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	.set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
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	.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,
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	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
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	.flush = iwl_mvm_mac_flush,
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	.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,
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	.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,

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	.channel_switch_beacon = iwl_mvm_channel_switch_beacon,

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	CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)

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#ifdef CONFIG_PM_SLEEP
	/* look at d3.c */
	.suspend = iwl_mvm_suspend,
	.resume = iwl_mvm_resume,
	.set_wakeup = iwl_mvm_set_wakeup,
	.set_rekey_data = iwl_mvm_set_rekey_data,
#if IS_ENABLED(CONFIG_IPV6)
	.ipv6_addr_change = iwl_mvm_ipv6_addr_change,
#endif
	.set_default_unicast_key = iwl_mvm_set_default_unicast_key,
#endif
};