mvm.h

/******************************************************************************
 *
 * 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 - 2014 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
 * in the file called COPYING.
 *
 * 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 - 2014 Intel Corporation. All rights reserved.
 * All rights reserved.
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 * 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.
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 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
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 *    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
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 *****************************************************************************/

#ifndef __IWL_MVM_H__
#define __IWL_MVM_H__

#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/leds.h>
#include <linux/in6.h>

#include "iwl-op-mode.h"
#include "iwl-trans.h"
#include "iwl-notif-wait.h"
#include "iwl-eeprom-parse.h"
#include "sta.h"
#include "fw-api.h"
#include "constants.h"

#define IWL_INVALID_MAC80211_QUEUE	0xff
#define IWL_MVM_MAX_ADDRESSES		5
/* RSSI offset for WkP */
#define IWL_RSSI_OFFSET 50
#define IWL_MVM_MISSED_BEACONS_THRESHOLD 8

enum iwl_mvm_tx_fifo {
	IWL_MVM_TX_FIFO_BK = 0,
	IWL_MVM_TX_FIFO_BE,
	IWL_MVM_TX_FIFO_VI,
	IWL_MVM_TX_FIFO_VO,
	IWL_MVM_TX_FIFO_MCAST = 5,
};

extern const struct ieee80211_ops iwl_mvm_hw_ops;

/**
 * struct iwl_mvm_mod_params - module parameters for iwlmvm
 * @init_dbg: if true, then the NIC won't be stopped if the INIT fw asserted.
 *	We will register to mac80211 to have testmode working. The NIC must not
 *	be up'ed after the INIT fw asserted. This is useful to be able to use
 *	proprietary tools over testmode to debug the INIT fw.
 * @power_scheme: CAM(Continuous Active Mode)-1, BPS(Balanced Power
 *	Save)-2(default), LP(Low Power)-3
 */
struct iwl_mvm_mod_params {
	bool init_dbg;
	int power_scheme;
};
extern struct iwl_mvm_mod_params iwlmvm_mod_params;

struct iwl_mvm_phy_ctxt {
	u16 id;
	u16 color;
	u32 ref;

	/*
	 * TODO: This should probably be removed. Currently here only for rate
	 * scaling algorithm
	 */
	struct ieee80211_channel *channel;
};

struct iwl_mvm_time_event_data {
	struct ieee80211_vif *vif;
	struct list_head list;
	unsigned long end_jiffies;
	u32 duration;
	bool running;
	u32 uid;

	/*
	 * The access to the 'id' field must be done when the
	 * mvm->time_event_lock is held, as it value is used to indicate
	 * if the te is in the time event list or not (when id == TE_MAX)
	 */
	u32 id;
};

 /* Power management */

/**
 * enum iwl_power_scheme
 * @IWL_POWER_LEVEL_CAM - Continuously Active Mode
 * @IWL_POWER_LEVEL_BPS - Balanced Power Save (default)
 * @IWL_POWER_LEVEL_LP  - Low Power
 */
enum iwl_power_scheme {
	IWL_POWER_SCHEME_CAM = 1,
	IWL_POWER_SCHEME_BPS,
	IWL_POWER_SCHEME_LP
};

#define IWL_CONN_MAX_LISTEN_INTERVAL	10
#define IWL_UAPSD_AC_INFO		(IEEE80211_WMM_IE_STA_QOSINFO_AC_VO |\
					 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI |\
					 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK |\
					 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
#define IWL_UAPSD_MAX_SP		IEEE80211_WMM_IE_STA_QOSINFO_SP_2

#ifdef CONFIG_IWLWIFI_DEBUGFS
enum iwl_dbgfs_pm_mask {
	MVM_DEBUGFS_PM_KEEP_ALIVE = BIT(0),
	MVM_DEBUGFS_PM_SKIP_OVER_DTIM = BIT(1),
	MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS = BIT(2),
	MVM_DEBUGFS_PM_RX_DATA_TIMEOUT = BIT(3),
	MVM_DEBUGFS_PM_TX_DATA_TIMEOUT = BIT(4),
	MVM_DEBUGFS_PM_LPRX_ENA = BIT(6),
	MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD = BIT(7),
	MVM_DEBUGFS_PM_SNOOZE_ENABLE = BIT(8),
	MVM_DEBUGFS_PM_UAPSD_MISBEHAVING = BIT(9),
};

struct iwl_dbgfs_pm {
	u16 keep_alive_seconds;
	u32 rx_data_timeout;
	u32 tx_data_timeout;
	bool skip_over_dtim;
	u8 skip_dtim_periods;
	bool lprx_ena;
	u32 lprx_rssi_threshold;
	bool snooze_ena;
	bool uapsd_misbehaving;
	int mask;
};

/* beacon filtering */

enum iwl_dbgfs_bf_mask {
	MVM_DEBUGFS_BF_ENERGY_DELTA = BIT(0),
	MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA = BIT(1),
	MVM_DEBUGFS_BF_ROAMING_STATE = BIT(2),
	MVM_DEBUGFS_BF_TEMP_THRESHOLD = BIT(3),
	MVM_DEBUGFS_BF_TEMP_FAST_FILTER = BIT(4),
	MVM_DEBUGFS_BF_TEMP_SLOW_FILTER = BIT(5),
	MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER = BIT(6),
	MVM_DEBUGFS_BF_DEBUG_FLAG = BIT(7),
	MVM_DEBUGFS_BF_ESCAPE_TIMER = BIT(8),
	MVM_DEBUGFS_BA_ESCAPE_TIMER = BIT(9),
	MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT = BIT(10),
};

struct iwl_dbgfs_bf {
	u32 bf_energy_delta;
	u32 bf_roaming_energy_delta;
	u32 bf_roaming_state;
	u32 bf_temp_threshold;
	u32 bf_temp_fast_filter;
	u32 bf_temp_slow_filter;
	u32 bf_enable_beacon_filter;
	u32 bf_debug_flag;
	u32 bf_escape_timer;
	u32 ba_escape_timer;
	u32 ba_enable_beacon_abort;
	int mask;
};
#endif

enum iwl_mvm_smps_type_request {
	IWL_MVM_SMPS_REQ_BT_COEX,
	IWL_MVM_SMPS_REQ_TT,
	NUM_IWL_MVM_SMPS_REQ,
};

enum iwl_mvm_ref_type {
	IWL_MVM_REF_UCODE_DOWN,
	IWL_MVM_REF_SCAN,
	IWL_MVM_REF_ROC,
	IWL_MVM_REF_P2P_CLIENT,
	IWL_MVM_REF_AP_IBSS,
	IWL_MVM_REF_USER,
	IWL_MVM_REF_TX,
	IWL_MVM_REF_TX_AGG,
	IWL_MVM_REF_EXIT_WORK,

	IWL_MVM_REF_COUNT,
};

enum iwl_bt_force_ant_mode {
	BT_FORCE_ANT_DIS = 0,
	BT_FORCE_ANT_AUTO,
	BT_FORCE_ANT_BT,
	BT_FORCE_ANT_WIFI,

	BT_FORCE_ANT_MAX,
};

/**
* struct iwl_mvm_vif_bf_data - beacon filtering related data
* @bf_enabled: indicates if beacon filtering is enabled
* @ba_enabled: indicated if beacon abort is enabled
* @last_beacon_signal: last beacon rssi signal in dbm
* @ave_beacon_signal: average beacon signal
* @last_cqm_event: rssi of the last cqm event
* @bt_coex_min_thold: minimum threshold for BT coex
* @bt_coex_max_thold: maximum threshold for BT coex
* @last_bt_coex_event: rssi of the last BT coex event
*/
struct iwl_mvm_vif_bf_data {
	bool bf_enabled;
	bool ba_enabled;
	s8 ave_beacon_signal;
	s8 last_cqm_event;
	s8 bt_coex_min_thold;
	s8 bt_coex_max_thold;
	s8 last_bt_coex_event;
};

/**
 * struct iwl_mvm_vif - data per Virtual Interface, it is a MAC context
 * @id: between 0 and 3
 * @color: to solve races upon MAC addition and removal
 * @ap_sta_id: the sta_id of the AP - valid only if VIF type is STA
 * @uploaded: indicates the MAC context has been added to the device
 * @ap_ibss_active: indicates that AP/IBSS is configured and that the interface
 *	should get quota etc.
 * @pm_enabled - Indicate if MAC power management is allowed
 * @monitor_active: indicates that monitor context is configured, and that the
 *	interface should get quota etc.
 * @low_latency: indicates that this interface is in low-latency mode
 *	(VMACLowLatencyMode)
 * @queue_params: QoS params for this MAC
 * @bcast_sta: station used for broadcast packets. Used by the following
 *  vifs: P2P_DEVICE, GO and AP.
 * @beacon_skb: the skb used to hold the AP/GO beacon template
 * @smps_requests: the SMPS requests of differents parts of the driver,
 *	combined on update to yield the overall request to mac80211.
 */
struct iwl_mvm_vif {
	u16 id;
	u16 color;
	u8 ap_sta_id;

	bool uploaded;
	bool ap_ibss_active;
	bool pm_enabled;
	bool monitor_active;
	bool low_latency;
	struct iwl_mvm_vif_bf_data bf_data;

	u32 ap_beacon_time;

	enum iwl_tsf_id tsf_id;

	/*
	 * QoS data from mac80211, need to store this here
	 * as mac80211 has a separate callback but we need
	 * to have the data for the MAC context
	 */
	struct ieee80211_tx_queue_params queue_params[IEEE80211_NUM_ACS];
	struct iwl_mvm_time_event_data time_event_data;

	struct iwl_mvm_int_sta bcast_sta;

	/*
	 * Assigned while mac80211 has the interface in a channel context,
	 * or, for P2P Device, while it exists.
	 */
	struct iwl_mvm_phy_ctxt *phy_ctxt;

#ifdef CONFIG_PM_SLEEP
	/* WoWLAN GTK rekey data */
	struct {
		u8 kck[NL80211_KCK_LEN], kek[NL80211_KEK_LEN];
		__le64 replay_ctr;
		bool valid;
	} rekey_data;

	int tx_key_idx;

	bool seqno_valid;
	u16 seqno;
#endif

#if IS_ENABLED(CONFIG_IPV6)
	/* IPv6 addresses for WoWLAN */
	struct in6_addr target_ipv6_addrs[IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS_MAX];
	int num_target_ipv6_addrs;
#endif

#ifdef CONFIG_IWLWIFI_DEBUGFS
	struct iwl_mvm *mvm;
	struct dentry *dbgfs_dir;
	struct dentry *dbgfs_slink;
	struct iwl_dbgfs_pm dbgfs_pm;
	struct iwl_dbgfs_bf dbgfs_bf;
	struct iwl_mac_power_cmd mac_pwr_cmd;
#endif

	enum ieee80211_smps_mode smps_requests[NUM_IWL_MVM_SMPS_REQ];

	/* FW identified misbehaving AP */
	u8 uapsd_misbehaving_bssid[ETH_ALEN];
};

static inline struct iwl_mvm_vif *
iwl_mvm_vif_from_mac80211(struct ieee80211_vif *vif)
{
	return (void *)vif->drv_priv;
}

extern const u8 tid_to_mac80211_ac[];

enum iwl_scan_status {
	IWL_MVM_SCAN_NONE,
	IWL_MVM_SCAN_OS,
	IWL_MVM_SCAN_SCHED,
};

/**
 * struct iwl_nvm_section - describes an NVM section in memory.
 *
 * This struct holds an NVM section read from the NIC using NVM_ACCESS_CMD,
 * and saved for later use by the driver. Not all NVM sections are saved
 * this way, only the needed ones.
 */
struct iwl_nvm_section {
	u16 length;
	const u8 *data;
};

/*
 * Tx-backoff threshold
 * @temperature: The threshold in Celsius
 * @backoff: The tx-backoff in uSec
 */
struct iwl_tt_tx_backoff {
	s32 temperature;
	u32 backoff;
};

#define TT_TX_BACKOFF_SIZE 6

/**
 * struct iwl_tt_params - thermal throttling parameters
 * @ct_kill_entry: CT Kill entry threshold
 * @ct_kill_exit: CT Kill exit threshold
 * @ct_kill_duration: The time  intervals (in uSec) in which the driver needs
 *	to checks whether to exit CT Kill.
 * @dynamic_smps_entry: Dynamic SMPS entry threshold
 * @dynamic_smps_exit: Dynamic SMPS exit threshold
 * @tx_protection_entry: TX protection entry threshold
 * @tx_protection_exit: TX protection exit threshold
 * @tx_backoff: Array of thresholds for tx-backoff , in ascending order.
 * @support_ct_kill: Support CT Kill?
 * @support_dynamic_smps: Support dynamic SMPS?
 * @support_tx_protection: Support tx protection?
 * @support_tx_backoff: Support tx-backoff?
 */
struct iwl_tt_params {
	s32 ct_kill_entry;
	s32 ct_kill_exit;
	u32 ct_kill_duration;
	s32 dynamic_smps_entry;
	s32 dynamic_smps_exit;
	s32 tx_protection_entry;
	s32 tx_protection_exit;
	struct iwl_tt_tx_backoff tx_backoff[TT_TX_BACKOFF_SIZE];
	bool support_ct_kill;
	bool support_dynamic_smps;
	bool support_tx_protection;
	bool support_tx_backoff;
};

/**
 * struct iwl_mvm_tt_mgnt - Thermal Throttling Management structure
 * @ct_kill_exit: worker to exit thermal kill
 * @dynamic_smps: Is thermal throttling enabled dynamic_smps?
 * @tx_backoff: The current thremal throttling tx backoff in uSec.
 * @min_backoff: The minimal tx backoff due to power restrictions
 * @params: Parameters to configure the thermal throttling algorithm.
 * @throttle: Is thermal throttling is active?
 */
struct iwl_mvm_tt_mgmt {
	struct delayed_work ct_kill_exit;
	bool dynamic_smps;
	u32 tx_backoff;
	u32 min_backoff;
	const struct iwl_tt_params *params;
	bool throttle;
};

#define IWL_MVM_NUM_LAST_FRAMES_UCODE_RATES 8

struct iwl_mvm_frame_stats {
	u32 legacy_frames;
	u32 ht_frames;
	u32 vht_frames;
	u32 bw_20_frames;
	u32 bw_40_frames;
	u32 bw_80_frames;
	u32 bw_160_frames;
	u32 sgi_frames;
	u32 ngi_frames;
	u32 siso_frames;
	u32 mimo2_frames;
	u32 agg_frames;
	u32 ampdu_count;
	u32 success_frames;
	u32 fail_frames;
	u32 last_rates[IWL_MVM_NUM_LAST_FRAMES_UCODE_RATES];
	int last_frame_idx;
};

enum {
	D0I3_DEFER_WAKEUP,
	D0I3_PENDING_WAKEUP,
};

struct iwl_mvm {
	/* for logger access */
	struct device *dev;

	struct iwl_trans *trans;
	const struct iwl_fw *fw;
	const struct iwl_cfg *cfg;
	struct iwl_phy_db *phy_db;
	struct ieee80211_hw *hw;

	/* for protecting access to iwl_mvm */
	struct mutex mutex;
	struct list_head async_handlers_list;
	spinlock_t async_handlers_lock;
	struct work_struct async_handlers_wk;

	struct work_struct roc_done_wk;

	unsigned long status;

	/*
	 * for beacon filtering -
	 * currently only one interface can be supported
	 */
	struct iwl_mvm_vif *bf_allowed_vif;

	enum iwl_ucode_type cur_ucode;
	bool ucode_loaded;
	bool init_ucode_complete;
	u32 error_event_table;
	u32 log_event_table;
	u32 umac_error_event_table;
	bool support_umac_log;
	struct iwl_sf_region sf_space;

	u32 ampdu_ref;

	struct iwl_notif_wait_data notif_wait;

	struct mvm_statistics_rx rx_stats;

	unsigned long transport_queue_stop;
	u8 queue_to_mac80211[IWL_MAX_HW_QUEUES];
	atomic_t queue_stop_count[IWL_MAX_HW_QUEUES];

	const char *nvm_file_name;
	struct iwl_nvm_data *nvm_data;
	/* NVM sections */
	struct iwl_nvm_section nvm_sections[NVM_MAX_NUM_SECTIONS];

	/* EEPROM MAC addresses */
	struct mac_address addresses[IWL_MVM_MAX_ADDRESSES];

	/* data related to data path */
	struct iwl_rx_phy_info last_phy_info;
	struct ieee80211_sta __rcu *fw_id_to_mac_id[IWL_MVM_STATION_COUNT];
	struct work_struct sta_drained_wk;
	unsigned long sta_drained[BITS_TO_LONGS(IWL_MVM_STATION_COUNT)];
	atomic_t pending_frames[IWL_MVM_STATION_COUNT];
	u8 rx_ba_sessions;

	/* configured by mac80211 */
	u32 rts_threshold;

	/* Scan status, cmd (pre-allocated) and auxiliary station */
	enum iwl_scan_status scan_status;
	struct iwl_scan_cmd *scan_cmd;
	struct iwl_mcast_filter_cmd *mcast_filter_cmd;

	/* rx chain antennas set through debugfs for the scan command */
	u8 scan_rx_ant;

#ifdef CONFIG_IWLWIFI_BCAST_FILTERING
	/* broadcast filters to configure for each associated station */
	const struct iwl_fw_bcast_filter *bcast_filters;
#ifdef CONFIG_IWLWIFI_DEBUGFS
	struct {
		u32 override; /* u32 for debugfs_create_bool */
		struct iwl_bcast_filter_cmd cmd;
	} dbgfs_bcast_filtering;
#endif
#endif

	/* Internal station */
	struct iwl_mvm_int_sta aux_sta;

	bool last_ebs_successful;

	u8 scan_last_antenna_idx; /* to toggle TX between antennas */
	u8 mgmt_last_antenna_idx;

	/* last smart fifo state that was successfully sent to firmware */
	enum iwl_sf_state sf_state;

#ifdef CONFIG_IWLWIFI_DEBUGFS
	struct dentry *debugfs_dir;
	u32 dbgfs_sram_offset, dbgfs_sram_len;
	u32 dbgfs_prph_reg_addr;
	bool disable_power_off;
	bool disable_power_off_d3;

	struct debugfs_blob_wrapper nvm_hw_blob;
	struct debugfs_blob_wrapper nvm_sw_blob;
	struct debugfs_blob_wrapper nvm_calib_blob;
	struct debugfs_blob_wrapper nvm_prod_blob;

	struct iwl_mvm_frame_stats drv_rx_stats;
	spinlock_t drv_stats_lock;
#endif

	struct iwl_mvm_phy_ctxt phy_ctxts[NUM_PHY_CTX];

	struct list_head time_event_list;
	spinlock_t time_event_lock;

	/*
	 * A bitmap indicating the index of the key in use. The firmware
	 * can hold 16 keys at most. Reflect this fact.
	 */
	unsigned long fw_key_table[BITS_TO_LONGS(STA_KEY_MAX_NUM)];

	/* A bitmap of reference types taken by the driver. */
	unsigned long ref_bitmap[BITS_TO_LONGS(IWL_MVM_REF_COUNT)];

	u8 vif_count;

	/* -1 for always, 0 for never, >0 for that many times */
	s8 restart_fw;
	void *fw_error_dump;

#ifdef CONFIG_IWLWIFI_LEDS
	struct led_classdev led;
#endif

	struct ieee80211_vif *p2p_device_vif;

#ifdef CONFIG_PM_SLEEP
	struct wiphy_wowlan_support wowlan;
	int gtk_ivlen, gtk_icvlen, ptk_ivlen, ptk_icvlen;
#ifdef CONFIG_IWLWIFI_DEBUGFS
	u32 d3_wake_sysassert; /* must be u32 for debugfs_create_bool */
	bool d3_test_active;
	bool store_d3_resume_sram;
	void *d3_resume_sram;
	u32 d3_test_pme_ptr;
	struct ieee80211_vif *keep_vif;
#endif
#endif

	/* d0i3 */
	u8 d0i3_ap_sta_id;
	bool d0i3_offloading;
	struct work_struct d0i3_exit_work;
	struct sk_buff_head d0i3_tx;
	/* protect d0i3_suspend_flags */
	struct mutex d0i3_suspend_mutex;
	unsigned long d0i3_suspend_flags;
	/* sync d0i3_tx queue and IWL_MVM_STATUS_IN_D0I3 status flag */
	spinlock_t d0i3_tx_lock;
	wait_queue_head_t d0i3_exit_waitq;

	/* BT-Coex */
	u8 bt_kill_msk;
	struct iwl_bt_coex_profile_notif last_bt_notif;
	struct iwl_bt_coex_ci_cmd last_bt_ci_cmd;
	u32 last_ant_isol;
	u8 last_corun_lut;
	u8 bt_tx_prio;
	enum iwl_bt_force_ant_mode bt_force_ant_mode;

	/* Thermal Throttling and CTkill */
	struct iwl_mvm_tt_mgmt thermal_throttle;
	s32 temperature;	/* Celsius */

#ifdef CONFIG_NL80211_TESTMODE
	u32 noa_duration;
	struct ieee80211_vif *noa_vif;
#endif

	/* Tx queues */
	u8 aux_queue;
	u8 first_agg_queue;
	u8 last_agg_queue;

	/* Indicate if device power save is allowed */
	bool ps_disabled;

	struct ieee80211_vif *csa_vif;

	/* system time of last beacon (for AP/GO interface) */
	u32 ap_last_beacon_gp2;
};

/* Extract MVM priv from op_mode and _hw */
#define IWL_OP_MODE_GET_MVM(_iwl_op_mode)		\
	((struct iwl_mvm *)(_iwl_op_mode)->op_mode_specific)

#define IWL_MAC80211_GET_MVM(_hw)			\
	IWL_OP_MODE_GET_MVM((struct iwl_op_mode *)((_hw)->priv))

enum iwl_mvm_status {
	IWL_MVM_STATUS_HW_RFKILL,
	IWL_MVM_STATUS_HW_CTKILL,
	IWL_MVM_STATUS_ROC_RUNNING,
	IWL_MVM_STATUS_IN_HW_RESTART,
	IWL_MVM_STATUS_IN_D0I3,
};

static inline bool iwl_mvm_is_radio_killed(struct iwl_mvm *mvm)
{
	return test_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status) ||
	       test_bit(IWL_MVM_STATUS_HW_CTKILL, &mvm->status);
}

static inline struct iwl_mvm_sta *
iwl_mvm_sta_from_staid_protected(struct iwl_mvm *mvm, u8 sta_id)
{
	struct ieee80211_sta *sta;

	if (sta_id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))
		return NULL;

	sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
					lockdep_is_held(&mvm->mutex));

	/* This can happen if the station has been removed right now */
	if (IS_ERR_OR_NULL(sta))
		return NULL;

	return iwl_mvm_sta_from_mac80211(sta);
}

static inline bool iwl_mvm_is_d0i3_supported(struct iwl_mvm *mvm)
{
	return mvm->trans->cfg->d0i3 &&
	       (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_D0I3_SUPPORT);
}

extern const u8 iwl_mvm_ac_to_tx_fifo[];

struct iwl_rate_info {
	u8 plcp;	/* uCode API:  IWL_RATE_6M_PLCP, etc. */
	u8 plcp_siso;	/* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
	u8 plcp_mimo2;	/* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
	u8 plcp_mimo3;  /* uCode API:  IWL_RATE_MIMO3_6M_PLCP, etc. */
	u8 ieee;	/* MAC header:  IWL_RATE_6M_IEEE, etc. */
};

/******************
 * MVM Methods
 ******************/
/* uCode */
int iwl_run_init_mvm_ucode(struct iwl_mvm *mvm, bool read_nvm);

/* Utils */
int iwl_mvm_legacy_rate_to_mac80211_idx(u32 rate_n_flags,
					enum ieee80211_band band);
void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
			       enum ieee80211_band band,
			       struct ieee80211_tx_rate *r);
u8 iwl_mvm_mac80211_idx_to_hwrate(int rate_idx);
void iwl_mvm_dump_nic_error_log(struct iwl_mvm *mvm);
u8 first_antenna(u8 mask);
u8 iwl_mvm_next_antenna(struct iwl_mvm *mvm, u8 valid, u8 last_idx);

/* Tx / Host Commands */
int __must_check iwl_mvm_send_cmd(struct iwl_mvm *mvm,
				  struct iwl_host_cmd *cmd);
int __must_check iwl_mvm_send_cmd_pdu(struct iwl_mvm *mvm, u8 id,
				      u32 flags, u16 len, const void *data);
int __must_check iwl_mvm_send_cmd_status(struct iwl_mvm *mvm,
					 struct iwl_host_cmd *cmd,
					 u32 *status);
int __must_check iwl_mvm_send_cmd_pdu_status(struct iwl_mvm *mvm, u8 id,
					     u16 len, const void *data,
					     u32 *status);
int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
		   struct ieee80211_sta *sta);
int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb);
#ifdef CONFIG_IWLWIFI_DEBUG
const char *iwl_mvm_get_tx_fail_reason(u32 status);
#else
static inline const char *iwl_mvm_get_tx_fail_reason(u32 status) { return ""; }
#endif
int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, bool sync);
void iwl_mvm_async_handlers_purge(struct iwl_mvm *mvm);

static inline void iwl_mvm_wait_for_async_handlers(struct iwl_mvm *mvm)
{
	flush_work(&mvm->async_handlers_wk);
}

/* Statistics */
int iwl_mvm_rx_reply_statistics(struct iwl_mvm *mvm,
				struct iwl_rx_cmd_buffer *rxb,
				struct iwl_device_cmd *cmd);
int iwl_mvm_rx_statistics(struct iwl_mvm *mvm,
			  struct iwl_rx_cmd_buffer *rxb,
			  struct iwl_device_cmd *cmd);

/* NVM */
int iwl_nvm_init(struct iwl_mvm *mvm, bool read_nvm_from_nic);
int iwl_mvm_load_nvm_to_nic(struct iwl_mvm *mvm);

int iwl_mvm_up(struct iwl_mvm *mvm);
int iwl_mvm_load_d3_fw(struct iwl_mvm *mvm);

int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm);
bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
				    struct iwl_bcast_filter_cmd *cmd);

/*
 * FW notifications / CMD responses handlers
 * Convention: iwl_mvm_rx_<NAME OF THE CMD>
 */
int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
			  struct iwl_device_cmd *cmd);
int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
		       struct iwl_device_cmd *cmd);
int iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
		      struct iwl_device_cmd *cmd);
int iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
			struct iwl_device_cmd *cmd);
int iwl_mvm_rx_radio_ver(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
			 struct iwl_device_cmd *cmd);
int iwl_mvm_rx_ant_coupling_notif(struct iwl_mvm *mvm,
				  struct iwl_rx_cmd_buffer *rxb,
				  struct iwl_device_cmd *cmd);
int iwl_mvm_rx_fw_error(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
			  struct iwl_device_cmd *cmd);
int iwl_mvm_rx_card_state_notif(struct iwl_mvm *mvm,
				struct iwl_rx_cmd_buffer *rxb,
				struct iwl_device_cmd *cmd);
int iwl_mvm_rx_radio_ver(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
			 struct iwl_device_cmd *cmd);

/* MVM PHY */
int iwl_mvm_phy_ctxt_add(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
			 struct cfg80211_chan_def *chandef,
			 u8 chains_static, u8 chains_dynamic);
int iwl_mvm_phy_ctxt_changed(struct iwl_mvm *mvm, struct iwl_mvm_phy_ctxt *ctxt,
			     struct cfg80211_chan_def *chandef,
			     u8 chains_static, u8 chains_dynamic);
void iwl_mvm_phy_ctxt_ref(struct iwl_mvm *mvm,
			  struct iwl_mvm_phy_ctxt *ctxt);
void iwl_mvm_phy_ctxt_unref(struct iwl_mvm *mvm,
			    struct iwl_mvm_phy_ctxt *ctxt);

/* MAC (virtual interface) programming */
int iwl_mvm_mac_ctxt_init(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
void iwl_mvm_mac_ctxt_release(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
int iwl_mvm_mac_ctxt_add(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
int iwl_mvm_mac_ctxt_changed(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			     bool force_assoc_off);
int iwl_mvm_mac_ctxt_remove(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
u32 iwl_mvm_mac_get_queues_mask(struct iwl_mvm *mvm,
				struct ieee80211_vif *vif);
int iwl_mvm_mac_ctxt_beacon_changed(struct iwl_mvm *mvm,
				    struct ieee80211_vif *vif);
int iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
			    struct iwl_rx_cmd_buffer *rxb,
			    struct iwl_device_cmd *cmd);
int iwl_mvm_rx_missed_beacons_notif(struct iwl_mvm *mvm,
				    struct iwl_rx_cmd_buffer *rxb,
				    struct iwl_device_cmd *cmd);
void iwl_mvm_mac_ctxt_recalc_tsf_id(struct iwl_mvm *mvm,
				    struct ieee80211_vif *vif);

/* Bindings */
int iwl_mvm_binding_add_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
int iwl_mvm_binding_remove_vif(struct iwl_mvm *mvm, struct ieee80211_vif *vif);

/* Quota management */
int iwl_mvm_update_quotas(struct iwl_mvm *mvm, struct ieee80211_vif *newvif);

/* Scanning */
int iwl_mvm_scan_request(struct iwl_mvm *mvm,
			 struct ieee80211_vif *vif,
			 struct cfg80211_scan_request *req);
int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
			     struct iwl_device_cmd *cmd);
int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
			     struct iwl_device_cmd *cmd);
int iwl_mvm_cancel_scan(struct iwl_mvm *mvm);

/* Scheduled scan */
int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
					   struct iwl_rx_cmd_buffer *rxb,
					   struct iwl_device_cmd *cmd);
int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm,
			      struct ieee80211_vif *vif,
			      struct cfg80211_sched_scan_request *req,
			      struct ieee80211_scan_ies *ies);
int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
				       struct cfg80211_sched_scan_request *req);
int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
			     struct cfg80211_sched_scan_request *req);
int iwl_mvm_sched_scan_stop(struct iwl_mvm *mvm, bool notify);
int iwl_mvm_rx_sched_scan_results(struct iwl_mvm *mvm,
				  struct iwl_rx_cmd_buffer *rxb,
				  struct iwl_device_cmd *cmd);

/* MVM debugfs */
#ifdef CONFIG_IWLWIFI_DEBUGFS
int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir);
void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
#else
static inline int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm,
					 struct dentry *dbgfs_dir)
{
	return 0;
}
static inline void
iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
}
static inline void
iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
}
#endif /* CONFIG_IWLWIFI_DEBUGFS */

/* rate scaling */
int iwl_mvm_send_lq_cmd(struct iwl_mvm *mvm, struct iwl_lq_cmd *lq, bool init);
void iwl_mvm_update_frame_stats(struct iwl_mvm *mvm,
				struct iwl_mvm_frame_stats *stats,
				u32 rate, bool agg);
int rs_pretty_print_rate(char *buf, const u32 rate);

/* power management */
int iwl_mvm_power_update_device(struct iwl_mvm *mvm);
int iwl_mvm_power_update_mac(struct iwl_mvm *mvm);
int iwl_mvm_power_mac_dbgfs_read(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
				 char *buf, int bufsz);

void iwl_mvm_power_vif_assoc(struct iwl_mvm *mvm, struct ieee80211_vif *vif);
int iwl_mvm_power_uapsd_misbehaving_ap_notif(struct iwl_mvm *mvm,
					     struct iwl_rx_cmd_buffer *rxb,
					     struct iwl_device_cmd *cmd);

#ifdef CONFIG_IWLWIFI_LEDS
int iwl_mvm_leds_init(struct iwl_mvm *mvm);
void iwl_mvm_leds_exit(struct iwl_mvm *mvm);
#else
static inline int iwl_mvm_leds_init(struct iwl_mvm *mvm)
{
	return 0;
}
static inline void iwl_mvm_leds_exit(struct iwl_mvm *mvm)
{
}
#endif

/* D3 (WoWLAN, NetDetect) */
int iwl_mvm_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan);
int iwl_mvm_resume(struct ieee80211_hw *hw);
void iwl_mvm_set_wakeup(struct ieee80211_hw *hw, bool enabled);
void iwl_mvm_set_rekey_data(struct ieee80211_hw *hw,
			    struct ieee80211_vif *vif,
			    struct cfg80211_gtk_rekey_data *data);
void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif,
			      struct inet6_dev *idev);
void iwl_mvm_set_default_unicast_key(struct ieee80211_hw *hw,
				     struct ieee80211_vif *vif, int idx);
extern const struct file_operations iwl_dbgfs_d3_test_ops;
#ifdef CONFIG_PM_SLEEP
void iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif);
#else
static inline void
iwl_mvm_set_last_nonqos_seq(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
{
}
#endif
void iwl_mvm_set_wowlan_qos_seq(struct iwl_mvm_sta *mvm_ap_sta,
				struct iwl_wowlan_config_cmd_v2 *cmd);
int iwl_mvm_send_proto_offload(struct iwl_mvm *mvm,
			       struct ieee80211_vif *vif,
			       bool disable_offloading,
			       u32 cmd_flags);

/* D0i3 */
void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type);
void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type);
void iwl_mvm_d0i3_enable_tx(struct iwl_mvm *mvm, __le16 *qos_seq);
int _iwl_mvm_exit_d0i3(struct iwl_mvm *mvm);

/* BT Coex */
int iwl_send_bt_init_conf(struct iwl_mvm *mvm);
int iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
			     struct iwl_rx_cmd_buffer *rxb,
			     struct iwl_device_cmd *cmd);
void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			   enum ieee80211_rssi_event rssi_event);
void iwl_mvm_bt_coex_vif_change(struct iwl_mvm *mvm);
u16 iwl_mvm_coex_agg_time_limit(struct iwl_mvm *mvm,
				struct ieee80211_sta *sta);
bool iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm *mvm,
				     struct ieee80211_sta *sta);
bool iwl_mvm_bt_coex_is_shared_ant_avail(struct iwl_mvm *mvm);
bool iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm *mvm,
				    enum ieee80211_band band);
u8 iwl_mvm_bt_coex_tx_prio(struct iwl_mvm *mvm, struct ieee80211_hdr *hdr,
			   struct ieee80211_tx_info *info, u8 ac);

enum iwl_bt_kill_msk {
	BT_KILL_MSK_DEFAULT,
	BT_KILL_MSK_SCO_HID_A2DP,
	BT_KILL_MSK_REDUCED_TXPOW,
	BT_KILL_MSK_MAX,
};
extern const u32 iwl_bt_ack_kill_msk[BT_KILL_MSK_MAX];
extern const u32 iwl_bt_cts_kill_msk[BT_KILL_MSK_MAX];

/* beacon filtering */
#ifdef CONFIG_IWLWIFI_DEBUGFS
void
iwl_mvm_beacon_filter_debugfs_parameters(struct ieee80211_vif *vif,
					 struct iwl_beacon_filter_cmd *cmd);
#else
static inline void
iwl_mvm_beacon_filter_debugfs_parameters(struct ieee80211_vif *vif,
					 struct iwl_beacon_filter_cmd *cmd)
{}
#endif
int iwl_mvm_update_d0i3_power_mode(struct iwl_mvm *mvm,
				   struct ieee80211_vif *vif,
				   bool enable, u32 flags);
int iwl_mvm_enable_beacon_filter(struct iwl_mvm *mvm,
				 struct ieee80211_vif *vif,
				 u32 flags);
int iwl_mvm_disable_beacon_filter(struct iwl_mvm *mvm,
				  struct ieee80211_vif *vif,
				  u32 flags);
/* SMPS */
void iwl_mvm_update_smps(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
				enum iwl_mvm_smps_type_request req_type,
				enum ieee80211_smps_mode smps_request);
bool iwl_mvm_rx_diversity_allowed(struct iwl_mvm *mvm);

/* Low latency */
int iwl_mvm_update_low_latency(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
			       bool value);
/* get SystemLowLatencyMode - only needed for beacon threshold? */
bool iwl_mvm_low_latency(struct iwl_mvm *mvm);
/* get VMACLowLatencyMode */
static inline bool iwl_mvm_vif_low_latency(struct iwl_mvm_vif *mvmvif)
{
	/*
	 * should this consider associated/active/... state?
	 *
	 * Normally low-latency should only be active on interfaces
	 * that are active, but at least with debugfs it can also be
	 * enabled on interfaces that aren't active. However, when
	 * interface aren't active then they aren't added into the
	 * binding, so this has no real impact. For now, just return
	 * the current desired low-latency state.
	 */

	return mvmvif->low_latency;
}

/* Assoc status */
bool iwl_mvm_is_idle(struct iwl_mvm *mvm);

/* Thermal management and CT-kill */
void iwl_mvm_tt_tx_backoff(struct iwl_mvm *mvm, u32 backoff);
void iwl_mvm_tt_handler(struct iwl_mvm *mvm);
void iwl_mvm_tt_initialize(struct iwl_mvm *mvm, u32 min_backoff);
void iwl_mvm_tt_exit(struct iwl_mvm *mvm);
void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state);

/* smart fifo */
int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
		      bool added_vif);

#endif /* __IWL_MVM_H__ */