mac80211.c 41.9 KB
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/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
 *
 * 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
 *
 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
 * 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 <net/mac80211.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"

static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
	{
		.max = 1,
		.types = BIT(NL80211_IFTYPE_STATION) |
			BIT(NL80211_IFTYPE_AP),
	},
};

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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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 |
		    IEEE80211_HW_CONNECTION_MONITOR;
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	hw->queues = IWL_MVM_FIRST_AGG_QUEUE;
	hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
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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;

	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_AP);
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	hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
			    WIPHY_FLAG_DISABLE_BEACON_HINTS |
			    WIPHY_FLAG_IBSS_RSN;

	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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	/* we create the 802.11 header and a max-length SSID element */
	hw->wiphy->max_scan_ie_len =
		mvm->fw->ucode_capa.max_probe_length - 24 - 34;
	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;

	hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
			       NL80211_FEATURE_P2P_GO_OPPPS;

	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;

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

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

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

	return ieee80211_register_hw(mvm->hw);
}

static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
			   struct ieee80211_tx_control *control,
			   struct sk_buff *skb)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

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

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

	if (control->sta) {
		if (iwl_mvm_tx_skb(mvm, skb, control->sta))
			goto drop;
		return;
	}

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

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;

	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;

	mutex_lock(&mvm->mutex);

	switch (action) {
	case IEEE80211_AMPDU_RX_START:
		if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) {
			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:
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		if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) {
			ret = -EINVAL;
			break;
		}
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		ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
		break;
	case IEEE80211_AMPDU_TX_STOP_CONT:
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		ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
		break;
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	case IEEE80211_AMPDU_TX_STOP_FLUSH:
	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
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		ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
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		break;
	case IEEE80211_AMPDU_TX_OPERATIONAL:
		ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
		break;
	default:
		WARN_ON_ONCE(1);
		ret = -EINVAL;
		break;
	}
	mutex_unlock(&mvm->mutex);

	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);

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	mvmvif->phy_ctxt = NULL;
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}

static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
{
	iwl_trans_stop_device(mvm->trans);
	iwl_trans_stop_hw(mvm->trans, false);

	mvm->scan_status = IWL_MVM_SCAN_NONE;

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

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

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	mvm->p2p_device_vif = NULL;

	iwl_mvm_reset_phy_ctxts(mvm);
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	memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
	memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));

	ieee80211_wake_queues(mvm->hw);

	mvm->vif_count = 0;
}

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

	mutex_lock(&mvm->mutex);

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

	ret = iwl_mvm_up(mvm);
	mutex_unlock(&mvm->mutex);

	return ret;
}

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

	mutex_lock(&mvm->mutex);

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

	mutex_unlock(&mvm->mutex);
}

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

	flush_work(&mvm->async_handlers_wk);

	mutex_lock(&mvm->mutex);
	/* 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_trans_stop_hw(mvm->trans, false);

	iwl_mvm_async_handlers_purge(mvm);
	/* async_handlers_list is empty and will stay empty: HW is stopped */

	/* the fw is stopped, the aux sta is dead: clean up driver state */
	iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);

	mutex_unlock(&mvm->mutex);

	/*
	 * The worker might have been waiting for the mutex, let it run and
	 * discover that its list is now empty.
	 */
	cancel_work_sync(&mvm->async_handlers_wk);
}

static void iwl_mvm_pm_disable_iterator(void *data, u8 *mac,
					struct ieee80211_vif *vif)
{
	struct iwl_mvm *mvm = data;
	int ret;

	ret = iwl_mvm_power_disable(mvm, vif);
	if (ret)
		IWL_ERR(mvm, "failed to disable power management\n");
}

static void iwl_mvm_power_update_iterator(void *data, u8 *mac,
					  struct ieee80211_vif *vif)
{
	struct iwl_mvm *mvm = data;

	iwl_mvm_power_update_mode(mvm, vif);
}

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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;
}

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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;

	/*
	 * 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);

	/* Allocate resources for the MAC context, and add it the the fw  */
	ret = iwl_mvm_mac_ctxt_init(mvm, vif);
	if (ret)
		goto out_unlock;

	/*
	 * 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 :)
	 */
	if (vif->type == NL80211_IFTYPE_AP) {
		u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
		ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
					       qmask);
		if (ret) {
			IWL_ERR(mvm, "Failed to allocate bcast sta\n");
			goto out_release;
		}

		goto out_unlock;
	}

	/*
	 * TODO: remove this temporary code.
	 * Currently MVM FW supports power management only on single MAC.
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	 * If new interface added, disable PM on existing interface.
	 * P2P device is a special case, since it is handled by FW similary to
	 * scan. If P2P deviced is added, PM remains enabled on existing
	 * interface.
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	 * Note: the method below does not count the new interface being added
	 * at this moment.
	 */
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	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count++;
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	if (mvm->vif_count > 1) {
		IWL_DEBUG_MAC80211(mvm,
				   "Disable power on existing interfaces\n");
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		ieee80211_iterate_active_interfaces_atomic(
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					    mvm->hw,
					    IEEE80211_IFACE_ITER_NORMAL,
					    iwl_mvm_pm_disable_iterator, mvm);
	}

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

	/*
	 * Update power state on the new interface. Admittedly, based on
	 * mac80211 logics this power update will disable power management
	 */
	iwl_mvm_power_update_mode(mvm, vif);

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	/* beacon filtering */
	if (!mvm->bf_allowed_vif &&
	    vif->type == NL80211_IFTYPE_STATION && !vif->p2p){
		mvm->bf_allowed_vif = mvmvif;
		vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
	}

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

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	/*
	 * 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) {

569 570 571 572 573
		mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
		if (!mvmvif->phy_ctxt) {
			ret = -ENOSPC;
			goto out_remove_mac;
		}
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575
		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
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		ret = iwl_mvm_binding_add_vif(mvm, vif);
		if (ret)
578
			goto out_unref_phy;
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		ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
		if (ret)
			goto out_unbind;

		/* Save a pointer to p2p device vif, so it can later be used to
		 * update the p2p device MAC when a GO is started/stopped */
		mvm->p2p_device_vif = vif;
	}

589
	iwl_mvm_vif_dbgfs_register(mvm, vif);
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	goto out_unlock;

 out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
594
 out_unref_phy:
595
	iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
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 out_remove_mac:
	mvmvif->phy_ctxt = NULL;
	iwl_mvm_mac_ctxt_remove(mvm, vif);
 out_release:
	/*
	 * TODO: remove this temporary code.
	 * Currently MVM FW supports power management only on single MAC.
603
	 * Check if only one additional interface remains after releasing
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	 * current one. Update power mode on the remaining interface.
	 */
606 607
	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
		mvm->vif_count--;
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	IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
			   mvm->vif_count);
	if (mvm->vif_count == 1) {
		ieee80211_iterate_active_interfaces(
					mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
					iwl_mvm_power_update_iterator, mvm);
	}
	iwl_mvm_mac_ctxt_release(mvm, vif);
 out_unlock:
	mutex_unlock(&mvm->mutex);

	return ret;
}

622 623
static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif)
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{
	u32 tfd_msk = 0, ac;

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

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

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

	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		/*
		 * Flush the ROC worker which will flush the OFFCHANNEL queue.
		 * We assume here that all the packets sent to the OFFCHANNEL
		 * queue are sent in ROC session.
		 */
		flush_work(&mvm->roc_done_wk);
	} else {
		/*
		 * By now, all the AC queues are empty. The AGG queues are
		 * empty too. We already got all the Tx responses for all the
		 * packets in the queues. The drain work can have been
		 * triggered. Flush it. This work item takes the mutex, so kill
		 * it before we take it.
		 */
		flush_work(&mvm->sta_drained_wk);
	}
657 658 659 660 661 662 663 664 665
}

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);
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	mutex_lock(&mvm->mutex);

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	if (mvm->bf_allowed_vif == mvmvif) {
		mvm->bf_allowed_vif = NULL;
		vif->driver_flags &= ~IEEE80211_VIF_BEACON_FILTER;
	}

674 675
	iwl_mvm_vif_dbgfs_clean(mvm, vif);

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	/*
	 * For AP/GO interface, the tear down of the resources allocated to the
678
	 * interface is be handled as part of the stop_ap flow.
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	 */
	if (vif->type == NL80211_IFTYPE_AP) {
		iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
		goto out_release;
	}

	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
		mvm->p2p_device_vif = NULL;
		iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
		iwl_mvm_binding_remove_vif(mvm, vif);
689
		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
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		mvmvif->phy_ctxt = NULL;
	}

	/*
	 * TODO: remove this temporary code.
	 * Currently MVM FW supports power management only on single MAC.
	 * Check if only one additional interface remains after removing
	 * current one. Update power mode on the remaining interface.
	 */
699
	if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
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		mvm->vif_count--;
	IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
			   mvm->vif_count);
	if (mvm->vif_count == 1) {
		ieee80211_iterate_active_interfaces(
					mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
					iwl_mvm_power_update_iterator, mvm);
	}

	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)
{
	return 0;
}

static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
				     unsigned int changed_flags,
				     unsigned int *total_flags,
				     u64 multicast)
{
	*total_flags = 0;
}

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static int iwl_mvm_configure_mcast_filter(struct iwl_mvm *mvm,
					  struct ieee80211_vif *vif)
{
	struct iwl_mcast_filter_cmd mcast_filter_cmd = {
		.pass_all = 1,
	};

	memcpy(mcast_filter_cmd.bssid, vif->bss_conf.bssid, ETH_ALEN);

	return iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_SYNC,
				    sizeof(mcast_filter_cmd),
				    &mcast_filter_cmd);
}

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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;

	ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
	if (ret)
		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);

	if (changes & BSS_CHANGED_ASSOC) {
		if (bss_conf->assoc) {
			/* add quota for this interface */
			ret = iwl_mvm_update_quotas(mvm, vif);
			if (ret) {
				IWL_ERR(mvm, "failed to update quotas\n");
				return;
			}
763
			iwl_mvm_bt_coex_vif_assoc(mvm, vif);
764
			iwl_mvm_configure_mcast_filter(mvm, vif);
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		} else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
			/* 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");
			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
			/* remove quota for this interface */
			ret = iwl_mvm_update_quotas(mvm, NULL);
			if (ret)
				IWL_ERR(mvm, "failed to update quotas\n");
		}
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	} else if (changes & BSS_CHANGED_DTIM_PERIOD) {
		/*
		 * We received a beacon _after_ association so
		 * remove the session protection.
		 */
		iwl_mvm_remove_time_event(mvm, mvmvif,
					  &mvmvif->time_event_data);
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	} else if (changes & BSS_CHANGED_PS) {
		/*
		 * TODO: remove this temporary code.
		 * Currently MVM FW supports power management only on single
		 * MAC. Avoid power mode update if more than one interface
		 * is active.
		 */
		IWL_DEBUG_MAC80211(mvm, "Currently %d interfaces active\n",
				   mvm->vif_count);
		if (mvm->vif_count == 1) {
			ret = iwl_mvm_power_update_mode(mvm, vif);
			if (ret)
				IWL_ERR(mvm, "failed to update power mode\n");
		}
	}
}

static int iwl_mvm_start_ap(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;

	mutex_lock(&mvm->mutex);

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

	/* 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;

	mvmvif->ap_active = true;

	/* Send the bcast station. At this stage the TBTT and DTIM time events
	 * are added and applied to the scheduler */
	ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
	if (ret)
		goto out_unbind;

	ret = iwl_mvm_update_quotas(mvm, vif);
	if (ret)
		goto out_rm_bcast;

	/* Need to update the P2P Device MAC */
	if (vif->p2p && mvm->p2p_device_vif)
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);

	mutex_unlock(&mvm->mutex);
	return 0;

out_rm_bcast:
	iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
out_unbind:
	iwl_mvm_binding_remove_vif(mvm, vif);
out_remove:
	iwl_mvm_mac_ctxt_remove(mvm, vif);
out_unlock:
	mutex_unlock(&mvm->mutex);
	return ret;
}

static void iwl_mvm_stop_ap(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);

858 859
	iwl_mvm_prepare_mac_removal(mvm, vif);

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	mutex_lock(&mvm->mutex);

	mvmvif->ap_active = false;

	/* Need to update the P2P Device MAC */
	if (vif->p2p && mvm->p2p_device_vif)
		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif);

	iwl_mvm_update_quotas(mvm, NULL);
	iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
	iwl_mvm_binding_remove_vif(mvm, vif);
	iwl_mvm_mac_ctxt_remove(mvm, vif);

	mutex_unlock(&mvm->mutex);
}

static void iwl_mvm_bss_info_changed_ap(struct iwl_mvm *mvm,
					struct ieee80211_vif *vif,
					struct ieee80211_bss_conf *bss_conf,
					u32 changes)
{
	/* Need to send a new beacon template to the FW */
	if (changes & BSS_CHANGED_BEACON) {
		if (iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
			IWL_WARN(mvm, "Failed updating beacon data\n");
	}
}

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);

	mutex_lock(&mvm->mutex);

	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
		iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
		break;
	case NL80211_IFTYPE_AP:
		iwl_mvm_bss_info_changed_ap(mvm, vif, bss_conf, changes);
		break;
	default:
		/* shouldn't happen */
		WARN_ON_ONCE(1);
	}

	mutex_unlock(&mvm->mutex);
}

static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
			       struct ieee80211_vif *vif,
			       struct cfg80211_scan_request *req)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
	int ret;

	if (req->n_channels == 0 || req->n_channels > MAX_NUM_SCAN_CHANNELS)
		return -EINVAL;

	mutex_lock(&mvm->mutex);

	if (mvm->scan_status == IWL_MVM_SCAN_NONE)
		ret = iwl_mvm_scan_request(mvm, vif, req);
	else
		ret = -EBUSY;

	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,
				  struct ieee80211_sta *sta, u16 tid,
				  int num_frames,
				  enum ieee80211_frame_release_type reason,
				  bool more_data)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	/* TODO: how do we tell the fw to send frames for a specific TID */

	/*
	 * The fw will send EOSP notification when the last frame will be
	 * transmitted.
	 */
961
	iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames);
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}

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);
	struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv;

	switch (cmd) {
	case STA_NOTIFY_SLEEP:
974
		if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
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			ieee80211_sta_block_awake(hw, sta, true);
		/*
		 * 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:
983
		if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
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			break;
985
		iwl_mvm_sta_modify_ps_wake(mvm, sta);
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		break;
	default:
		break;
	}
}

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) {
		ret = iwl_mvm_add_sta(mvm, vif, sta);
	} else if (old_state == IEEE80211_STA_NONE &&
		   new_state == IEEE80211_STA_AUTH) {
		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTH &&
		   new_state == IEEE80211_STA_ASSOC) {
1021 1022 1023 1024
		ret = iwl_mvm_update_sta(mvm, vif, sta);
		if (ret == 0)
			iwl_mvm_rs_rate_init(mvm, sta,
					     mvmvif->phy_ctxt->channel->band);
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	} else if (old_state == IEEE80211_STA_ASSOC &&
		   new_state == IEEE80211_STA_AUTHORIZED) {
1027 1028
		/* enable beacon filtering */
		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif));
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		ret = 0;
	} else if (old_state == IEEE80211_STA_AUTHORIZED &&
		   new_state == IEEE80211_STA_ASSOC) {
1032 1033
		/* disable beacon filtering */
		WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif));
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		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);
	} else {
		ret = -EIO;
	}
	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;
}

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);
		ret = iwl_mvm_mac_ctxt_changed(mvm, vif);
		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;

	mutex_lock(&mvm->mutex);
	/* Try really hard to protect the session and hear a beacon */
	iwl_mvm_protect_session(mvm, vif, duration, min_duration);
	mutex_unlock(&mvm->mutex);
}

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:
		return -EOPNOTSUPP;
	}

	mutex_lock(&mvm->mutex);

	switch (cmd) {
	case SET_KEY:
1143 1144 1145 1146 1147 1148 1149
		if (vif->type == NL80211_IFTYPE_AP && !sta) {
			/* GTK on AP interface is a TX-only key, return 0 */
			ret = 0;
			key->hw_key_idx = STA_KEY_IDX_INVALID;
			break;
		}

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		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
			 */
1158
			key->hw_key_idx = STA_KEY_IDX_INVALID;
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			ret = 0;
		}

		break;
	case DISABLE_KEY:
1164 1165 1166 1167 1168
		if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
			ret = 0;
			break;
		}

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		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);

	iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
}


static int iwl_mvm_roc(struct ieee80211_hw *hw,
		       struct ieee80211_vif *vif,
		       struct ieee80211_channel *channel,
1195 1196
		       int duration,
		       enum ieee80211_roc_type type)
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{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1199
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
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	struct cfg80211_chan_def chandef;
1201 1202 1203 1204 1205
	struct iwl_mvm_phy_ctxt *phy_ctxt;
	int ret, i;

	IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
			   duration, type);
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	if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
		IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
		return -EINVAL;
	}

	mutex_lock(&mvm->mutex);

1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245
	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;

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	cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);

1248 1249 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 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293
	/*
	 * 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:
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	/* Schedule the time events */
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	ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
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out_unlock:
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	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;
}

static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
			       struct ieee80211_chanctx_conf *ctx)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1321 1322
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt;
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	int ret;

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	IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
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	mutex_lock(&mvm->mutex);
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	phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
	if (!phy_ctxt) {
		ret = -ENOSPC;
		goto out;
	}
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	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->def,
				       ctx->rx_chains_static,
				       ctx->rx_chains_dynamic);
1337 1338 1339 1340 1341
	if (ret) {
		IWL_ERR(mvm, "Failed to add PHY context\n");
		goto out;
	}

1342
	iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
1343 1344
	*phy_ctxt_id = phy_ctxt->id;
out:
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	mutex_unlock(&mvm->mutex);
	return ret;
}

static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
				   struct ieee80211_chanctx_conf *ctx)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1353 1354
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
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	mutex_lock(&mvm->mutex);
1357
	iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
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	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);
1366 1367
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
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	if (WARN_ONCE((phy_ctxt->ref > 1) &&
		      (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
				   IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
				   IEEE80211_CHANCTX_CHANGE_RADAR)),
		      "Cannot change PHY. Ref=%d, changed=0x%X\n",
		      phy_ctxt->ref, changed))
		return;

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	mutex_lock(&mvm->mutex);
	iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->def,
				 ctx->rx_chains_static,
				 ctx->rx_chains_dynamic);
	mutex_unlock(&mvm->mutex);
}

static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif,
				      struct ieee80211_chanctx_conf *ctx)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1389 1390
	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
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	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
	int ret;

	mutex_lock(&mvm->mutex);

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	mvmvif->phy_ctxt = phy_ctxt;
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	switch (vif->type) {
	case NL80211_IFTYPE_AP:
		/*
		 * The AP binding flow is handled as part of the start_ap flow
		 * (in bss_info_changed).
		 */
		ret = 0;
		goto out_unlock;
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_ADHOC:
	case NL80211_IFTYPE_MONITOR:
		break;
	default:
		ret = -EINVAL;
		goto out_unlock;
	}

	ret = iwl_mvm_binding_add_vif(mvm, vif);
	if (ret)
		goto out_unlock;

	/*
	 * Setting the quota at this stage is only required for monitor
	 * interfaces. For the other types, the bss_info changed flow
	 * will handle quota settings.
	 */
	if (vif->type == NL80211_IFTYPE_MONITOR) {
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		mvmvif->monitor_active = true;
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		ret = iwl_mvm_update_quotas(mvm, vif);
		if (ret)
			goto out_remove_binding;
	}

	goto out_unlock;

 out_remove_binding:
	iwl_mvm_binding_remove_vif(mvm, vif);
 out_unlock:
	mutex_unlock(&mvm->mutex);
	if (ret)
		mvmvif->phy_ctxt = NULL;
	return ret;
}

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);
	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	mutex_lock(&mvm->mutex);

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

	if (vif->type == NL80211_IFTYPE_AP)
		goto out_unlock;

	switch (vif->type) {
	case NL80211_IFTYPE_MONITOR:
1458 1459
		mvmvif->monitor_active = false;
		iwl_mvm_update_quotas(mvm, NULL);
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		break;
	default:
		break;
	}

1465
	iwl_mvm_binding_remove_vif(mvm, vif);
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out_unlock:
	mvmvif->phy_ctxt = NULL;
	mutex_unlock(&mvm->mutex);
}

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);
}

1486 1487 1488 1489 1490 1491 1492 1493 1494
static void iwl_mvm_mac_rssi_callback(struct ieee80211_hw *hw,
				      struct ieee80211_vif *vif,
				      enum ieee80211_rssi_event rssi_event)
{
	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);

	iwl_mvm_bt_rssi_event(mvm, vif, rssi_event);
}

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struct ieee80211_ops iwl_mvm_hw_ops = {
	.tx = iwl_mvm_mac_tx,
	.ampdu_action = iwl_mvm_mac_ampdu_action,
	.start = iwl_mvm_mac_start,
	.restart_complete = iwl_mvm_mac_restart_complete,
	.stop = iwl_mvm_mac_stop,
	.add_interface = iwl_mvm_mac_add_interface,
	.remove_interface = iwl_mvm_mac_remove_interface,
	.config = iwl_mvm_mac_config,
	.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,
	.sta_state = iwl_mvm_mac_sta_state,
	.sta_notify = iwl_mvm_mac_sta_notify,
	.allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
	.set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
	.conf_tx = iwl_mvm_mac_conf_tx,
	.mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
	.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,
1518
	.rssi_callback = iwl_mvm_mac_rssi_callback,
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	.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,

	.start_ap = iwl_mvm_start_ap,
	.stop_ap = iwl_mvm_stop_ap,

	.set_tim = iwl_mvm_set_tim,

#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
};