drivers/net/wireless/iwlwifi/mvm/rs.h - kernel/msm-4.19 - Gitiles

 /******************************************************************************
  *
  * Copyright(c) 2003 - 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 LICENSE.
  *
  * Contact Information:
  *  Intel Linux Wireless <ilw@linux.intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
  *****************************************************************************/

 #ifndef __rs_h__
 #define __rs_h__

 #include <net/mac80211.h>

 #include "iwl-config.h"

 #include "fw-api.h"
 #include "iwl-trans.h"

 struct iwl_rs_rate_info {
 	u8 plcp;	  /* uCode API:  IWL_RATE_6M_PLCP, etc. */
 	u8 plcp_ht_siso;  /* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
 	u8 plcp_ht_mimo2; /* uCode API:  IWL_RATE_MIMO2_6M_PLCP, etc. */
 	u8 plcp_vht_siso;
 	u8 plcp_vht_mimo2;
 	u8 prev_rs;      /* previous rate used in rs algo */
 	u8 next_rs;      /* next rate used in rs algo */
 };

 #define IWL_RATE_60M_PLCP 3

 enum {
 	IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
 	IWL_RATE_INVALID = IWL_RATE_COUNT,
 };

 #define LINK_QUAL_MAX_RETRY_NUM 16

 enum {
 	IWL_RATE_6M_INDEX_TABLE = 0,
 	IWL_RATE_9M_INDEX_TABLE,
 	IWL_RATE_12M_INDEX_TABLE,
 	IWL_RATE_18M_INDEX_TABLE,
 	IWL_RATE_24M_INDEX_TABLE,
 	IWL_RATE_36M_INDEX_TABLE,
 	IWL_RATE_48M_INDEX_TABLE,
 	IWL_RATE_54M_INDEX_TABLE,
 	IWL_RATE_1M_INDEX_TABLE,
 	IWL_RATE_2M_INDEX_TABLE,
 	IWL_RATE_5M_INDEX_TABLE,
 	IWL_RATE_11M_INDEX_TABLE,
 	IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
 };

 /* #define vs. enum to keep from defaulting to 'large integer' */
 #define	IWL_RATE_6M_MASK   (1 << IWL_RATE_6M_INDEX)
 #define	IWL_RATE_9M_MASK   (1 << IWL_RATE_9M_INDEX)
 #define	IWL_RATE_12M_MASK  (1 << IWL_RATE_12M_INDEX)
 #define	IWL_RATE_18M_MASK  (1 << IWL_RATE_18M_INDEX)
 #define	IWL_RATE_24M_MASK  (1 << IWL_RATE_24M_INDEX)
 #define	IWL_RATE_36M_MASK  (1 << IWL_RATE_36M_INDEX)
 #define	IWL_RATE_48M_MASK  (1 << IWL_RATE_48M_INDEX)
 #define	IWL_RATE_54M_MASK  (1 << IWL_RATE_54M_INDEX)
 #define IWL_RATE_60M_MASK  (1 << IWL_RATE_60M_INDEX)
 #define	IWL_RATE_1M_MASK   (1 << IWL_RATE_1M_INDEX)
 #define	IWL_RATE_2M_MASK   (1 << IWL_RATE_2M_INDEX)
 #define	IWL_RATE_5M_MASK   (1 << IWL_RATE_5M_INDEX)
 #define	IWL_RATE_11M_MASK  (1 << IWL_RATE_11M_INDEX)


 /* uCode API values for HT/VHT bit rates */
 enum {
 	IWL_RATE_HT_SISO_MCS_0_PLCP = 0,
 	IWL_RATE_HT_SISO_MCS_1_PLCP = 1,
 	IWL_RATE_HT_SISO_MCS_2_PLCP = 2,
 	IWL_RATE_HT_SISO_MCS_3_PLCP = 3,
 	IWL_RATE_HT_SISO_MCS_4_PLCP = 4,
 	IWL_RATE_HT_SISO_MCS_5_PLCP = 5,
 	IWL_RATE_HT_SISO_MCS_6_PLCP = 6,
 	IWL_RATE_HT_SISO_MCS_7_PLCP = 7,
 	IWL_RATE_HT_MIMO2_MCS_0_PLCP = 0x8,
 	IWL_RATE_HT_MIMO2_MCS_1_PLCP = 0x9,
 	IWL_RATE_HT_MIMO2_MCS_2_PLCP = 0xA,
 	IWL_RATE_HT_MIMO2_MCS_3_PLCP = 0xB,
 	IWL_RATE_HT_MIMO2_MCS_4_PLCP = 0xC,
 	IWL_RATE_HT_MIMO2_MCS_5_PLCP = 0xD,
 	IWL_RATE_HT_MIMO2_MCS_6_PLCP = 0xE,
 	IWL_RATE_HT_MIMO2_MCS_7_PLCP = 0xF,
 	IWL_RATE_VHT_SISO_MCS_0_PLCP = 0,
 	IWL_RATE_VHT_SISO_MCS_1_PLCP = 1,
 	IWL_RATE_VHT_SISO_MCS_2_PLCP = 2,
 	IWL_RATE_VHT_SISO_MCS_3_PLCP = 3,
 	IWL_RATE_VHT_SISO_MCS_4_PLCP = 4,
 	IWL_RATE_VHT_SISO_MCS_5_PLCP = 5,
 	IWL_RATE_VHT_SISO_MCS_6_PLCP = 6,
 	IWL_RATE_VHT_SISO_MCS_7_PLCP = 7,
 	IWL_RATE_VHT_SISO_MCS_8_PLCP = 8,
 	IWL_RATE_VHT_SISO_MCS_9_PLCP = 9,
 	IWL_RATE_VHT_MIMO2_MCS_0_PLCP = 0x10,
 	IWL_RATE_VHT_MIMO2_MCS_1_PLCP = 0x11,
 	IWL_RATE_VHT_MIMO2_MCS_2_PLCP = 0x12,
 	IWL_RATE_VHT_MIMO2_MCS_3_PLCP = 0x13,
 	IWL_RATE_VHT_MIMO2_MCS_4_PLCP = 0x14,
 	IWL_RATE_VHT_MIMO2_MCS_5_PLCP = 0x15,
 	IWL_RATE_VHT_MIMO2_MCS_6_PLCP = 0x16,
 	IWL_RATE_VHT_MIMO2_MCS_7_PLCP = 0x17,
 	IWL_RATE_VHT_MIMO2_MCS_8_PLCP = 0x18,
 	IWL_RATE_VHT_MIMO2_MCS_9_PLCP = 0x19,
 	IWL_RATE_HT_SISO_MCS_INV_PLCP,
 	IWL_RATE_HT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 	IWL_RATE_VHT_SISO_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 	IWL_RATE_VHT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 	IWL_RATE_HT_SISO_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 	IWL_RATE_HT_SISO_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 	IWL_RATE_HT_MIMO2_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 	IWL_RATE_HT_MIMO2_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
 };

 #define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)

 #define IWL_INVALID_VALUE    -1

 #define IWL_MIN_RSSI_VAL                 -100
 #define IWL_MAX_RSSI_VAL                    0

 /* These values specify how many Tx frame attempts before
  * searching for a new modulation mode */
 #define IWL_LEGACY_FAILURE_LIMIT	160
 #define IWL_LEGACY_SUCCESS_LIMIT	480
 #define IWL_LEGACY_TABLE_COUNT		160

 #define IWL_NONE_LEGACY_FAILURE_LIMIT	400
 #define IWL_NONE_LEGACY_SUCCESS_LIMIT	4500
 #define IWL_NONE_LEGACY_TABLE_COUNT	1500

 /* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
 #define IWL_RS_GOOD_RATIO		12800	/* 100% */
 #define IWL_RATE_SCALE_SWITCH		10880	/*  85% */
 #define IWL_RATE_HIGH_TH		10880	/*  85% */
 #define IWL_RATE_INCREASE_TH		6400	/*  50% */
 #define RS_SR_FORCE_DECREASE		1920	/*  15% */
 #define RS_SR_NO_DECREASE		10880	/*  85% */

 #define TPC_SR_FORCE_INCREASE		9600	/* 75% */
 #define TPC_SR_NO_INCREASE		10880	/* 85% */
 #define TPC_TX_POWER_STEP		3
 #define TPC_MAX_REDUCTION		15
 #define TPC_NO_REDUCTION		0
 #define TPC_INVALID			0xff

 #define LINK_QUAL_AGG_TIME_LIMIT_DEF	(4000) /* 4 milliseconds */
 #define LINK_QUAL_AGG_TIME_LIMIT_MAX	(8000)
 #define LINK_QUAL_AGG_TIME_LIMIT_MIN	(100)

 #define LINK_QUAL_AGG_DISABLE_START_DEF	(3)
 #define LINK_QUAL_AGG_DISABLE_START_MAX	(255)
 #define LINK_QUAL_AGG_DISABLE_START_MIN	(0)

 #define LINK_QUAL_AGG_FRAME_LIMIT_DEF	(63)
 #define LINK_QUAL_AGG_FRAME_LIMIT_MAX	(63)
 #define LINK_QUAL_AGG_FRAME_LIMIT_MIN	(0)

 #define LQ_SIZE		2	/* 2 mode tables:  "Active" and "Search" */

 /* load per tid defines for A-MPDU activation */
 #define IWL_AGG_TPT_THREHOLD	0
 #define IWL_AGG_LOAD_THRESHOLD	10
 #define IWL_AGG_ALL_TID		0xff
 #define TID_QUEUE_CELL_SPACING	50	/*mS */
 #define TID_QUEUE_MAX_SIZE	20
 #define TID_ROUND_VALUE		5	/* mS */

 #define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
 #define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))

 enum iwl_table_type {
 	LQ_NONE,
 	LQ_LEGACY_G,	/* legacy types */
 	LQ_LEGACY_A,
 	LQ_HT_SISO,	/* HT types */
 	LQ_HT_MIMO2,
 	LQ_VHT_SISO,    /* VHT types */
 	LQ_VHT_MIMO2,
 	LQ_MAX,
 };

 struct rs_rate {
 	int index;
 	enum iwl_table_type type;
 	u8 ant;
 	u32 bw;
 	bool sgi;
 	bool ldpc;
 };


 #define is_type_legacy(type) (((type) == LQ_LEGACY_G) || \
 			      ((type) == LQ_LEGACY_A))
 #define is_type_ht_siso(type) ((type) == LQ_HT_SISO)
 #define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2)
 #define is_type_vht_siso(type) ((type) == LQ_VHT_SISO)
 #define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2)
 #define is_type_siso(type) (is_type_ht_siso(type) || is_type_vht_siso(type))
 #define is_type_mimo2(type) (is_type_ht_mimo2(type) || is_type_vht_mimo2(type))
 #define is_type_mimo(type) (is_type_mimo2(type))
 #define is_type_ht(type) (is_type_ht_siso(type) || is_type_ht_mimo2(type))
 #define is_type_vht(type) (is_type_vht_siso(type) || is_type_vht_mimo2(type))
 #define is_type_a_band(type) ((type) == LQ_LEGACY_A)
 #define is_type_g_band(type) ((type) == LQ_LEGACY_G)

 #define is_legacy(rate)       is_type_legacy((rate)->type)
 #define is_ht_siso(rate)      is_type_ht_siso((rate)->type)
 #define is_ht_mimo2(rate)     is_type_ht_mimo2((rate)->type)
 #define is_vht_siso(rate)     is_type_vht_siso((rate)->type)
 #define is_vht_mimo2(rate)    is_type_vht_mimo2((rate)->type)
 #define is_siso(rate)         is_type_siso((rate)->type)
 #define is_mimo2(rate)        is_type_mimo2((rate)->type)
 #define is_mimo(rate)         is_type_mimo((rate)->type)
 #define is_ht(rate)           is_type_ht((rate)->type)
 #define is_vht(rate)          is_type_vht((rate)->type)
 #define is_a_band(rate)       is_type_a_band((rate)->type)
 #define is_g_band(rate)       is_type_g_band((rate)->type)

 #define is_ht20(rate)         ((rate)->bw == RATE_MCS_CHAN_WIDTH_20)
 #define is_ht40(rate)         ((rate)->bw == RATE_MCS_CHAN_WIDTH_40)
 #define is_ht80(rate)         ((rate)->bw == RATE_MCS_CHAN_WIDTH_80)

 #define IWL_MAX_MCS_DISPLAY_SIZE	12

 struct iwl_rate_mcs_info {
 	char	mbps[IWL_MAX_MCS_DISPLAY_SIZE];
 	char	mcs[IWL_MAX_MCS_DISPLAY_SIZE];
 };

 /**
  * struct iwl_rate_scale_data -- tx success history for one rate
  */
 struct iwl_rate_scale_data {
 	u64 data;		/* bitmap of successful frames */
 	s32 success_counter;	/* number of frames successful */
 	s32 success_ratio;	/* per-cent * 128  */
 	s32 counter;		/* number of frames attempted */
 	s32 average_tpt;	/* success ratio * expected throughput */
 };

 /* Possible Tx columns
  * Tx Column = a combo of legacy/siso/mimo x antenna x SGI
  */
 enum rs_column {
 	RS_COLUMN_LEGACY_ANT_A = 0,
 	RS_COLUMN_LEGACY_ANT_B,
 	RS_COLUMN_SISO_ANT_A,
 	RS_COLUMN_SISO_ANT_B,
 	RS_COLUMN_SISO_ANT_A_SGI,
 	RS_COLUMN_SISO_ANT_B_SGI,
 	RS_COLUMN_MIMO2,
 	RS_COLUMN_MIMO2_SGI,

 	RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI,
 	RS_COLUMN_COUNT = RS_COLUMN_LAST + 1,
 	RS_COLUMN_INVALID,
 };

 /* Packet stats per rate */
 struct rs_rate_stats {
 	u64 success;
 	u64 total;
 };

 /**
  * struct iwl_scale_tbl_info -- tx params and success history for all rates
  *
  * There are two of these in struct iwl_lq_sta,
  * one for "active", and one for "search".
  */
 struct iwl_scale_tbl_info {
 	struct rs_rate rate;
 	enum rs_column column;
 	const u16 *expected_tpt;	/* throughput metrics; expected_tpt_G, etc. */
 	struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
 	/* per txpower-reduction history */
 	struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1];
 };

 enum {
 	RS_STATE_SEARCH_CYCLE_STARTED,
 	RS_STATE_SEARCH_CYCLE_ENDED,
 	RS_STATE_STAY_IN_COLUMN,
 };

 /**
  * struct iwl_lq_sta -- driver's rate scaling private structure
  *
  * Pointer to this gets passed back and forth between driver and mac80211.
  */
 struct iwl_lq_sta {
 	u8 active_tbl;		/* index of active table, range 0-1 */
 	u8 rs_state;            /* RS_STATE_* */
 	u8 search_better_tbl;	/* 1: currently trying alternate mode */
 	s32 last_tpt;

 	/* The following determine when to search for a new mode */
 	u32 table_count_limit;
 	u32 max_failure_limit;	/* # failed frames before new search */
 	u32 max_success_limit;	/* # successful frames before new search */
 	u32 table_count;
 	u32 total_failed;	/* total failed frames, any/all rates */
 	u32 total_success;	/* total successful frames, any/all rates */
 	u64 flush_timer;	/* time staying in mode before new search */

 	u32 visited_columns;    /* Bitmask marking which Tx columns were
 				 * explored during a search cycle
 				 */
 	u64 last_tx;
 	bool is_vht;
 	bool ldpc;              /* LDPC Rx is supported by the STA */
 	enum ieee80211_band band;

 	/* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
 	unsigned long active_legacy_rate;
 	unsigned long active_siso_rate;
 	unsigned long active_mimo2_rate;

 	/* Highest rate per Tx mode */
 	u8 max_legacy_rate_idx;
 	u8 max_siso_rate_idx;
 	u8 max_mimo2_rate_idx;

 	u8 missed_rate_counter;

 	struct iwl_lq_cmd lq;
 	struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
 	u8 tx_agg_tid_en;

 	/* used to be in sta_info */
 	int last_txrate_idx;
 	/* last tx rate_n_flags */
 	u32 last_rate_n_flags;
 	/* packets destined for this STA are aggregated */
 	u8 is_agg;

 	/* tx power reduce for this sta */
 	int tpc_reduce;

 	/* persistent fields - initialized only once - keep last! */
 	struct lq_sta_pers {
 #ifdef CONFIG_MAC80211_DEBUGFS
 		u32 dbg_fixed_rate;
 		u8 dbg_fixed_txp_reduction;
 #endif
 		u8 chains;
 		s8 chain_signal[IEEE80211_MAX_CHAINS];
 		struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT];
 		struct iwl_mvm *drv;
 	} pers;
 };

 /* Initialize station's rate scaling information after adding station */
 void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 			  enum ieee80211_band band, bool init);

 /* Notify RS about Tx status */
 void iwl_mvm_rs_tx_status(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
 			  int tid, struct ieee80211_tx_info *info);

 /**
  * iwl_rate_control_register - Register the rate control algorithm callbacks
  *
  * Since the rate control algorithm is hardware specific, there is no need
  * or reason to place it as a stand alone module.  The driver can call
  * iwl_rate_control_register in order to register the rate control callbacks
  * with the mac80211 subsystem.  This should be performed prior to calling
  * ieee80211_register_hw
  *
  */
 int iwl_mvm_rate_control_register(void);

 /**
  * iwl_rate_control_unregister - Unregister the rate control callbacks
  *
  * This should be called after calling ieee80211_unregister_hw, but before
  * the driver is unloaded.
  */
 void iwl_mvm_rate_control_unregister(void);

 struct iwl_mvm_sta;

 int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
 			  bool enable);

 #endif /* __rs__ */
	/******************************************************************************
	*
	* Copyright(c) 2003 - 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 LICENSE.
	*
	* Contact Information:
	* Intel Linux Wireless <ilw@linux.intel.com>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*
	*****************************************************************************/

	#ifndef __rs_h__
	#define __rs_h__

	#include <net/mac80211.h>

	#include "iwl-config.h"

	#include "fw-api.h"
	#include "iwl-trans.h"

	struct iwl_rs_rate_info {
	u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */
	u8 plcp_ht_siso; /* uCode API: IWL_RATE_SISO_6M_PLCP, etc. */
	u8 plcp_ht_mimo2; /* uCode API: IWL_RATE_MIMO2_6M_PLCP, etc. */
	u8 plcp_vht_siso;
	u8 plcp_vht_mimo2;
	u8 prev_rs; /* previous rate used in rs algo */
	u8 next_rs; /* next rate used in rs algo */
	};

	#define IWL_RATE_60M_PLCP 3

	enum {
	IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
	IWL_RATE_INVALID = IWL_RATE_COUNT,
	};

	#define LINK_QUAL_MAX_RETRY_NUM 16

	enum {
	IWL_RATE_6M_INDEX_TABLE = 0,
	IWL_RATE_9M_INDEX_TABLE,
	IWL_RATE_12M_INDEX_TABLE,
	IWL_RATE_18M_INDEX_TABLE,
	IWL_RATE_24M_INDEX_TABLE,
	IWL_RATE_36M_INDEX_TABLE,
	IWL_RATE_48M_INDEX_TABLE,
	IWL_RATE_54M_INDEX_TABLE,
	IWL_RATE_1M_INDEX_TABLE,
	IWL_RATE_2M_INDEX_TABLE,
	IWL_RATE_5M_INDEX_TABLE,
	IWL_RATE_11M_INDEX_TABLE,
	IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
	};

	/* #define vs. enum to keep from defaulting to 'large integer' */
	#define IWL_RATE_6M_MASK (1 << IWL_RATE_6M_INDEX)
	#define IWL_RATE_9M_MASK (1 << IWL_RATE_9M_INDEX)
	#define IWL_RATE_12M_MASK (1 << IWL_RATE_12M_INDEX)
	#define IWL_RATE_18M_MASK (1 << IWL_RATE_18M_INDEX)
	#define IWL_RATE_24M_MASK (1 << IWL_RATE_24M_INDEX)
	#define IWL_RATE_36M_MASK (1 << IWL_RATE_36M_INDEX)
	#define IWL_RATE_48M_MASK (1 << IWL_RATE_48M_INDEX)
	#define IWL_RATE_54M_MASK (1 << IWL_RATE_54M_INDEX)
	#define IWL_RATE_60M_MASK (1 << IWL_RATE_60M_INDEX)
	#define IWL_RATE_1M_MASK (1 << IWL_RATE_1M_INDEX)
	#define IWL_RATE_2M_MASK (1 << IWL_RATE_2M_INDEX)
	#define IWL_RATE_5M_MASK (1 << IWL_RATE_5M_INDEX)
	#define IWL_RATE_11M_MASK (1 << IWL_RATE_11M_INDEX)


	/* uCode API values for HT/VHT bit rates */
	enum {
	IWL_RATE_HT_SISO_MCS_0_PLCP = 0,
	IWL_RATE_HT_SISO_MCS_1_PLCP = 1,
	IWL_RATE_HT_SISO_MCS_2_PLCP = 2,
	IWL_RATE_HT_SISO_MCS_3_PLCP = 3,
	IWL_RATE_HT_SISO_MCS_4_PLCP = 4,
	IWL_RATE_HT_SISO_MCS_5_PLCP = 5,
	IWL_RATE_HT_SISO_MCS_6_PLCP = 6,
	IWL_RATE_HT_SISO_MCS_7_PLCP = 7,
	IWL_RATE_HT_MIMO2_MCS_0_PLCP = 0x8,
	IWL_RATE_HT_MIMO2_MCS_1_PLCP = 0x9,
	IWL_RATE_HT_MIMO2_MCS_2_PLCP = 0xA,
	IWL_RATE_HT_MIMO2_MCS_3_PLCP = 0xB,
	IWL_RATE_HT_MIMO2_MCS_4_PLCP = 0xC,
	IWL_RATE_HT_MIMO2_MCS_5_PLCP = 0xD,
	IWL_RATE_HT_MIMO2_MCS_6_PLCP = 0xE,
	IWL_RATE_HT_MIMO2_MCS_7_PLCP = 0xF,
	IWL_RATE_VHT_SISO_MCS_0_PLCP = 0,
	IWL_RATE_VHT_SISO_MCS_1_PLCP = 1,
	IWL_RATE_VHT_SISO_MCS_2_PLCP = 2,
	IWL_RATE_VHT_SISO_MCS_3_PLCP = 3,
	IWL_RATE_VHT_SISO_MCS_4_PLCP = 4,
	IWL_RATE_VHT_SISO_MCS_5_PLCP = 5,
	IWL_RATE_VHT_SISO_MCS_6_PLCP = 6,
	IWL_RATE_VHT_SISO_MCS_7_PLCP = 7,
	IWL_RATE_VHT_SISO_MCS_8_PLCP = 8,
	IWL_RATE_VHT_SISO_MCS_9_PLCP = 9,
	IWL_RATE_VHT_MIMO2_MCS_0_PLCP = 0x10,
	IWL_RATE_VHT_MIMO2_MCS_1_PLCP = 0x11,
	IWL_RATE_VHT_MIMO2_MCS_2_PLCP = 0x12,
	IWL_RATE_VHT_MIMO2_MCS_3_PLCP = 0x13,
	IWL_RATE_VHT_MIMO2_MCS_4_PLCP = 0x14,
	IWL_RATE_VHT_MIMO2_MCS_5_PLCP = 0x15,
	IWL_RATE_VHT_MIMO2_MCS_6_PLCP = 0x16,
	IWL_RATE_VHT_MIMO2_MCS_7_PLCP = 0x17,
	IWL_RATE_VHT_MIMO2_MCS_8_PLCP = 0x18,
	IWL_RATE_VHT_MIMO2_MCS_9_PLCP = 0x19,
	IWL_RATE_HT_SISO_MCS_INV_PLCP,
	IWL_RATE_HT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	IWL_RATE_VHT_SISO_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	IWL_RATE_VHT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	IWL_RATE_HT_SISO_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	IWL_RATE_HT_SISO_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	IWL_RATE_HT_MIMO2_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	IWL_RATE_HT_MIMO2_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	};

	#define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)

	#define IWL_INVALID_VALUE -1

	#define IWL_MIN_RSSI_VAL -100
	#define IWL_MAX_RSSI_VAL 0

	/* These values specify how many Tx frame attempts before
	* searching for a new modulation mode */
	#define IWL_LEGACY_FAILURE_LIMIT 160
	#define IWL_LEGACY_SUCCESS_LIMIT 480
	#define IWL_LEGACY_TABLE_COUNT 160

	#define IWL_NONE_LEGACY_FAILURE_LIMIT 400
	#define IWL_NONE_LEGACY_SUCCESS_LIMIT 4500
	#define IWL_NONE_LEGACY_TABLE_COUNT 1500

	/* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
	#define IWL_RS_GOOD_RATIO 12800 /* 100% */
	#define IWL_RATE_SCALE_SWITCH 10880 /* 85% */
	#define IWL_RATE_HIGH_TH 10880 /* 85% */
	#define IWL_RATE_INCREASE_TH 6400 /* 50% */
	#define RS_SR_FORCE_DECREASE 1920 /* 15% */
	#define RS_SR_NO_DECREASE 10880 /* 85% */

	#define TPC_SR_FORCE_INCREASE 9600 /* 75% */
	#define TPC_SR_NO_INCREASE 10880 /* 85% */
	#define TPC_TX_POWER_STEP 3
	#define TPC_MAX_REDUCTION 15
	#define TPC_NO_REDUCTION 0
	#define TPC_INVALID 0xff

	#define LINK_QUAL_AGG_TIME_LIMIT_DEF (4000) /* 4 milliseconds */
	#define LINK_QUAL_AGG_TIME_LIMIT_MAX (8000)
	#define LINK_QUAL_AGG_TIME_LIMIT_MIN (100)

	#define LINK_QUAL_AGG_DISABLE_START_DEF (3)
	#define LINK_QUAL_AGG_DISABLE_START_MAX (255)
	#define LINK_QUAL_AGG_DISABLE_START_MIN (0)

	#define LINK_QUAL_AGG_FRAME_LIMIT_DEF (63)
	#define LINK_QUAL_AGG_FRAME_LIMIT_MAX (63)
	#define LINK_QUAL_AGG_FRAME_LIMIT_MIN (0)

	#define LQ_SIZE 2 /* 2 mode tables: "Active" and "Search" */

	/* load per tid defines for A-MPDU activation */
	#define IWL_AGG_TPT_THREHOLD 0
	#define IWL_AGG_LOAD_THRESHOLD 10
	#define IWL_AGG_ALL_TID 0xff
	#define TID_QUEUE_CELL_SPACING 50 /mS /
	#define TID_QUEUE_MAX_SIZE 20
	#define TID_ROUND_VALUE 5 /* mS */

	#define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
	#define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))

	enum iwl_table_type {
	LQ_NONE,
	LQ_LEGACY_G, /* legacy types */
	LQ_LEGACY_A,
	LQ_HT_SISO, /* HT types */
	LQ_HT_MIMO2,
	LQ_VHT_SISO, /* VHT types */
	LQ_VHT_MIMO2,
	LQ_MAX,
	};

	struct rs_rate {
	int index;
	enum iwl_table_type type;
	u8 ant;
	u32 bw;
	bool sgi;
	bool ldpc;
	};


	#define is_type_legacy(type) (((type) == LQ_LEGACY_G) \|\| \
	((type) == LQ_LEGACY_A))
	#define is_type_ht_siso(type) ((type) == LQ_HT_SISO)
	#define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2)
	#define is_type_vht_siso(type) ((type) == LQ_VHT_SISO)
	#define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2)
	#define is_type_siso(type) (is_type_ht_siso(type) \|\| is_type_vht_siso(type))
	#define is_type_mimo2(type) (is_type_ht_mimo2(type) \|\| is_type_vht_mimo2(type))
	#define is_type_mimo(type) (is_type_mimo2(type))
	#define is_type_ht(type) (is_type_ht_siso(type) \|\| is_type_ht_mimo2(type))
	#define is_type_vht(type) (is_type_vht_siso(type) \|\| is_type_vht_mimo2(type))
	#define is_type_a_band(type) ((type) == LQ_LEGACY_A)
	#define is_type_g_band(type) ((type) == LQ_LEGACY_G)

	#define is_legacy(rate) is_type_legacy((rate)->type)
	#define is_ht_siso(rate) is_type_ht_siso((rate)->type)
	#define is_ht_mimo2(rate) is_type_ht_mimo2((rate)->type)
	#define is_vht_siso(rate) is_type_vht_siso((rate)->type)
	#define is_vht_mimo2(rate) is_type_vht_mimo2((rate)->type)
	#define is_siso(rate) is_type_siso((rate)->type)
	#define is_mimo2(rate) is_type_mimo2((rate)->type)
	#define is_mimo(rate) is_type_mimo((rate)->type)
	#define is_ht(rate) is_type_ht((rate)->type)
	#define is_vht(rate) is_type_vht((rate)->type)
	#define is_a_band(rate) is_type_a_band((rate)->type)
	#define is_g_band(rate) is_type_g_band((rate)->type)

	#define is_ht20(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_20)
	#define is_ht40(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_40)
	#define is_ht80(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_80)

	#define IWL_MAX_MCS_DISPLAY_SIZE 12

	struct iwl_rate_mcs_info {
	char mbps[IWL_MAX_MCS_DISPLAY_SIZE];
	char mcs[IWL_MAX_MCS_DISPLAY_SIZE];
	};

	/**
	* struct iwl_rate_scale_data -- tx success history for one rate
	*/
	struct iwl_rate_scale_data {
	u64 data; /* bitmap of successful frames */
	s32 success_counter; /* number of frames successful */
	s32 success_ratio; /* per-cent * 128 */
	s32 counter; /* number of frames attempted */
	s32 average_tpt; /* success ratio * expected throughput */
	};

	/* Possible Tx columns
	* Tx Column = a combo of legacy/siso/mimo x antenna x SGI
	*/
	enum rs_column {
	RS_COLUMN_LEGACY_ANT_A = 0,
	RS_COLUMN_LEGACY_ANT_B,
	RS_COLUMN_SISO_ANT_A,
	RS_COLUMN_SISO_ANT_B,
	RS_COLUMN_SISO_ANT_A_SGI,
	RS_COLUMN_SISO_ANT_B_SGI,
	RS_COLUMN_MIMO2,
	RS_COLUMN_MIMO2_SGI,

	RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI,
	RS_COLUMN_COUNT = RS_COLUMN_LAST + 1,
	RS_COLUMN_INVALID,
	};

	/* Packet stats per rate */
	struct rs_rate_stats {
	u64 success;
	u64 total;
	};

	/**
	* struct iwl_scale_tbl_info -- tx params and success history for all rates
	*
	* There are two of these in struct iwl_lq_sta,
	* one for "active", and one for "search".
	*/
	struct iwl_scale_tbl_info {
	struct rs_rate rate;
	enum rs_column column;
	const u16 expected_tpt; / throughput metrics; expected_tpt_G, etc. */
	struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
	/* per txpower-reduction history */
	struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1];
	};

	enum {
	RS_STATE_SEARCH_CYCLE_STARTED,
	RS_STATE_SEARCH_CYCLE_ENDED,
	RS_STATE_STAY_IN_COLUMN,
	};

	/**
	* struct iwl_lq_sta -- driver's rate scaling private structure
	*
	* Pointer to this gets passed back and forth between driver and mac80211.
	*/
	struct iwl_lq_sta {
	u8 active_tbl; /* index of active table, range 0-1 */
	u8 rs_state; /* RS_STATE_* */
	u8 search_better_tbl; /* 1: currently trying alternate mode */
	s32 last_tpt;

	/* The following determine when to search for a new mode */
	u32 table_count_limit;
	u32 max_failure_limit; /* # failed frames before new search */
	u32 max_success_limit; /* # successful frames before new search */
	u32 table_count;
	u32 total_failed; /* total failed frames, any/all rates */
	u32 total_success; /* total successful frames, any/all rates */
	u64 flush_timer; /* time staying in mode before new search */

	u32 visited_columns; /* Bitmask marking which Tx columns were
	* explored during a search cycle
	*/
	u64 last_tx;
	bool is_vht;
	bool ldpc; /* LDPC Rx is supported by the STA */
	enum ieee80211_band band;

	/* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
	unsigned long active_legacy_rate;
	unsigned long active_siso_rate;
	unsigned long active_mimo2_rate;

	/* Highest rate per Tx mode */
	u8 max_legacy_rate_idx;
	u8 max_siso_rate_idx;
	u8 max_mimo2_rate_idx;

	u8 missed_rate_counter;

	struct iwl_lq_cmd lq;
	struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
	u8 tx_agg_tid_en;

	/* used to be in sta_info */
	int last_txrate_idx;
	/* last tx rate_n_flags */
	u32 last_rate_n_flags;
	/* packets destined for this STA are aggregated */
	u8 is_agg;

	/* tx power reduce for this sta */
	int tpc_reduce;

	/* persistent fields - initialized only once - keep last! */
	struct lq_sta_pers {
	#ifdef CONFIG_MAC80211_DEBUGFS
	u32 dbg_fixed_rate;
	u8 dbg_fixed_txp_reduction;
	#endif
	u8 chains;
	s8 chain_signal[IEEE80211_MAX_CHAINS];
	struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT];
	struct iwl_mvm *drv;
	} pers;
	};

	/* Initialize station's rate scaling information after adding station */
	void iwl_mvm_rs_rate_init(struct iwl_mvm mvm, struct ieee80211_sta sta,
	enum ieee80211_band band, bool init);

	/* Notify RS about Tx status */
	void iwl_mvm_rs_tx_status(struct iwl_mvm mvm, struct ieee80211_sta sta,
	int tid, struct ieee80211_tx_info *info);

	/**
	* iwl_rate_control_register - Register the rate control algorithm callbacks
	*
	* Since the rate control algorithm is hardware specific, there is no need
	* or reason to place it as a stand alone module. The driver can call
	* iwl_rate_control_register in order to register the rate control callbacks
	* with the mac80211 subsystem. This should be performed prior to calling
	* ieee80211_register_hw
	*
	*/
	int iwl_mvm_rate_control_register(void);

	/**
	* iwl_rate_control_unregister - Unregister the rate control callbacks
	*
	* This should be called after calling ieee80211_unregister_hw, but before
	* the driver is unloaded.
	*/
	void iwl_mvm_rate_control_unregister(void);

	struct iwl_mvm_sta;

	int iwl_mvm_tx_protection(struct iwl_mvm mvm, struct iwl_mvm_sta mvmsta,
	bool enable);

	#endif /* __rs__ */