[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / intel / iwlwifi / mvm / rs.h

/******************************************************************************
 *
 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2015 Intel Mobile Communications GmbH
 * Copyright(c) 2017 Intel Deutschland GmbH
 *
 * 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 <linuxwifi@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 TPC_MAX_REDUCTION		15
#define TPC_NO_REDUCTION		0
#define TPC_INVALID			0xff

#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_ALL_TID		0xff

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;
	bool stbc;
	bool bfer;
};


#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 is_ht160(rate)        ((rate)->bw == RATE_MCS_CHAN_WIDTH_160)

#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,
};

enum rs_ss_force_opt {
	RS_SS_FORCE_NONE = 0,
	RS_SS_FORCE_STBC,
	RS_SS_FORCE_BFER,
	RS_SS_FORCE_SISO,
};

/* 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 */
	bool stbc_capable;      /* Tx STBC is supported by chip and Rx by STA */
	bool bfer_capable;      /* Remote supports beamformee and we BFer */

	enum nl80211_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;

	/* Optimal rate based on RSSI and STA caps.
	 * Used only to reflect link speed to userspace.
	 */
	struct rs_rate optimal_rate;
	unsigned long optimal_rate_mask;
	const struct rs_init_rate_info *optimal_rates;
	int optimal_nentries;

	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;

	/* 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;

		/* force STBC/BFER/SISO for testing */
		enum rs_ss_force_opt ss_force;
#endif
		u8 chains;
		s8 chain_signal[IEEE80211_MAX_CHAINS];
		s8 last_rssi;
		struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT];
		struct iwl_mvm *drv;
	} pers;
};

/* ieee80211_tx_info's status_driver_data[0] is packed with lq color and txp
 * Note, it's iwlmvm <-> mac80211 interface.
 * bits 0-7: reduced tx power
 * bits 8-10: LQ command's color
 */
#define RS_DRV_DATA_TXP_MSK 0xff
#define RS_DRV_DATA_LQ_COLOR_POS 8
#define RS_DRV_DATA_LQ_COLOR_MSK (7 << RS_DRV_DATA_LQ_COLOR_POS)
#define RS_DRV_DATA_LQ_COLOR_GET(_f) (((_f) & RS_DRV_DATA_LQ_COLOR_MSK) >>\
				      RS_DRV_DATA_LQ_COLOR_POS)
#define RS_DRV_DATA_PACK(_c, _p) ((void *)(uintptr_t)\
				  (((uintptr_t)_p) |\
				   ((_c) << RS_DRV_DATA_LQ_COLOR_POS)))

/* Initialize station's rate scaling information after adding station */
void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
			  enum nl80211_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, bool ndp);

/**
 * 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__ */
Commit	Line	Data
8ca151b5 JB	1	/******************************************************************************
8ca151b5 JB	2	*
51368bf7	3	* Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
b503ed60	4	* Copyright(c) 2015 Intel Mobile Communications GmbH
ea42d1cb	5	* Copyright(c) 2017 Intel Deutschland GmbH
8ca151b5 JB	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of version 2 of the GNU General Public License as
	9	* published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	14	* more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along with
	17	* this program; if not, write to the Free Software Foundation, Inc.,
	18	* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
	19	*
	20	* The full GNU General Public License is included in this distribution in the
	21	* file called LICENSE.
	22	*
	23	* Contact Information:
cb2f8277	24	* Intel Linux Wireless <linuxwifi@intel.com>
8ca151b5 JB	25	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	26	*
	27	*****************************************************************************/
	28
	29	#ifndef __rs_h__
	30	#define __rs_h__
	31
	32	#include <net/mac80211.h>
	33
	34	#include "iwl-config.h"
	35
	36	#include "fw-api.h"
	37	#include "iwl-trans.h"
	38
	39	struct iwl_rs_rate_info {
d310e405 ES	40	u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */
	41	u8 plcp_ht_siso; /* uCode API: IWL_RATE_SISO_6M_PLCP, etc. */
	42	u8 plcp_ht_mimo2; /* uCode API: IWL_RATE_MIMO2_6M_PLCP, etc. */
	43	u8 plcp_vht_siso;
	44	u8 plcp_vht_mimo2;
8ca151b5 JB	45	u8 prev_rs; /* previous rate used in rs algo */
8ca151b5 JB	46	u8 next_rs; /* next rate used in rs algo */
8ca151b5 JB	47	};
	48
	49	#define IWL_RATE_60M_PLCP 3
	50
	51	enum {
	52	IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
	53	IWL_RATE_INVALID = IWL_RATE_COUNT,
	54	};
	55
	56	#define LINK_QUAL_MAX_RETRY_NUM 16
	57
	58	enum {
	59	IWL_RATE_6M_INDEX_TABLE = 0,
	60	IWL_RATE_9M_INDEX_TABLE,
	61	IWL_RATE_12M_INDEX_TABLE,
	62	IWL_RATE_18M_INDEX_TABLE,
	63	IWL_RATE_24M_INDEX_TABLE,
	64	IWL_RATE_36M_INDEX_TABLE,
	65	IWL_RATE_48M_INDEX_TABLE,
	66	IWL_RATE_54M_INDEX_TABLE,
	67	IWL_RATE_1M_INDEX_TABLE,
	68	IWL_RATE_2M_INDEX_TABLE,
	69	IWL_RATE_5M_INDEX_TABLE,
	70	IWL_RATE_11M_INDEX_TABLE,
	71	IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
	72	};
	73
	74	/* #define vs. enum to keep from defaulting to 'large integer' */
	75	#define IWL_RATE_6M_MASK (1 << IWL_RATE_6M_INDEX)
	76	#define IWL_RATE_9M_MASK (1 << IWL_RATE_9M_INDEX)
	77	#define IWL_RATE_12M_MASK (1 << IWL_RATE_12M_INDEX)
	78	#define IWL_RATE_18M_MASK (1 << IWL_RATE_18M_INDEX)
	79	#define IWL_RATE_24M_MASK (1 << IWL_RATE_24M_INDEX)
	80	#define IWL_RATE_36M_MASK (1 << IWL_RATE_36M_INDEX)
	81	#define IWL_RATE_48M_MASK (1 << IWL_RATE_48M_INDEX)
	82	#define IWL_RATE_54M_MASK (1 << IWL_RATE_54M_INDEX)
	83	#define IWL_RATE_60M_MASK (1 << IWL_RATE_60M_INDEX)
	84	#define IWL_RATE_1M_MASK (1 << IWL_RATE_1M_INDEX)
	85	#define IWL_RATE_2M_MASK (1 << IWL_RATE_2M_INDEX)
	86	#define IWL_RATE_5M_MASK (1 << IWL_RATE_5M_INDEX)
	87	#define IWL_RATE_11M_MASK (1 << IWL_RATE_11M_INDEX)
	88
	89
d310e405	90	/* uCode API values for HT/VHT bit rates */
8ca151b5	91	enum {
d310e405 ES	92	IWL_RATE_HT_SISO_MCS_0_PLCP = 0,
	93	IWL_RATE_HT_SISO_MCS_1_PLCP = 1,
	94	IWL_RATE_HT_SISO_MCS_2_PLCP = 2,
	95	IWL_RATE_HT_SISO_MCS_3_PLCP = 3,
	96	IWL_RATE_HT_SISO_MCS_4_PLCP = 4,
	97	IWL_RATE_HT_SISO_MCS_5_PLCP = 5,
	98	IWL_RATE_HT_SISO_MCS_6_PLCP = 6,
	99	IWL_RATE_HT_SISO_MCS_7_PLCP = 7,
	100	IWL_RATE_HT_MIMO2_MCS_0_PLCP = 0x8,
	101	IWL_RATE_HT_MIMO2_MCS_1_PLCP = 0x9,
	102	IWL_RATE_HT_MIMO2_MCS_2_PLCP = 0xA,
	103	IWL_RATE_HT_MIMO2_MCS_3_PLCP = 0xB,
	104	IWL_RATE_HT_MIMO2_MCS_4_PLCP = 0xC,
	105	IWL_RATE_HT_MIMO2_MCS_5_PLCP = 0xD,
	106	IWL_RATE_HT_MIMO2_MCS_6_PLCP = 0xE,
	107	IWL_RATE_HT_MIMO2_MCS_7_PLCP = 0xF,
	108	IWL_RATE_VHT_SISO_MCS_0_PLCP = 0,
	109	IWL_RATE_VHT_SISO_MCS_1_PLCP = 1,
	110	IWL_RATE_VHT_SISO_MCS_2_PLCP = 2,
	111	IWL_RATE_VHT_SISO_MCS_3_PLCP = 3,
	112	IWL_RATE_VHT_SISO_MCS_4_PLCP = 4,
	113	IWL_RATE_VHT_SISO_MCS_5_PLCP = 5,
	114	IWL_RATE_VHT_SISO_MCS_6_PLCP = 6,
	115	IWL_RATE_VHT_SISO_MCS_7_PLCP = 7,
	116	IWL_RATE_VHT_SISO_MCS_8_PLCP = 8,
	117	IWL_RATE_VHT_SISO_MCS_9_PLCP = 9,
	118	IWL_RATE_VHT_MIMO2_MCS_0_PLCP = 0x10,
	119	IWL_RATE_VHT_MIMO2_MCS_1_PLCP = 0x11,
	120	IWL_RATE_VHT_MIMO2_MCS_2_PLCP = 0x12,
	121	IWL_RATE_VHT_MIMO2_MCS_3_PLCP = 0x13,
	122	IWL_RATE_VHT_MIMO2_MCS_4_PLCP = 0x14,
	123	IWL_RATE_VHT_MIMO2_MCS_5_PLCP = 0x15,
	124	IWL_RATE_VHT_MIMO2_MCS_6_PLCP = 0x16,
	125	IWL_RATE_VHT_MIMO2_MCS_7_PLCP = 0x17,
	126	IWL_RATE_VHT_MIMO2_MCS_8_PLCP = 0x18,
	127	IWL_RATE_VHT_MIMO2_MCS_9_PLCP = 0x19,
	128	IWL_RATE_HT_SISO_MCS_INV_PLCP,
	129	IWL_RATE_HT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	130	IWL_RATE_VHT_SISO_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	131	IWL_RATE_VHT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	132	IWL_RATE_HT_SISO_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	133	IWL_RATE_HT_SISO_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	134	IWL_RATE_HT_MIMO2_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
	135	IWL_RATE_HT_MIMO2_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
8ca151b5 JB	136	};
8ca151b5 JB	137
8ca151b5 JB	138	#define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
	139
	140	#define IWL_INVALID_VALUE -1
	141
2fd647f8 EP	142	#define TPC_MAX_REDUCTION 15
	143	#define TPC_NO_REDUCTION 0
	144	#define TPC_INVALID 0xff
	145
8ca151b5 JB	146	#define LINK_QUAL_AGG_FRAME_LIMIT_DEF (63)
	147	#define LINK_QUAL_AGG_FRAME_LIMIT_MAX (63)
	148	#define LINK_QUAL_AGG_FRAME_LIMIT_MIN (0)
	149
	150	#define LQ_SIZE 2 /* 2 mode tables: "Active" and "Search" */
	151
	152	/* load per tid defines for A-MPDU activation */
	153	#define IWL_AGG_TPT_THREHOLD 0
8ca151b5	154	#define IWL_AGG_ALL_TID 0xff
8ca151b5 JB	155
	156	enum iwl_table_type {
	157	LQ_NONE,
d310e405 ES	158	LQ_LEGACY_G, /* legacy types */
	159	LQ_LEGACY_A,
	160	LQ_HT_SISO, /* HT types */
	161	LQ_HT_MIMO2,
	162	LQ_VHT_SISO, /* VHT types */
	163	LQ_VHT_MIMO2,
8ca151b5 JB	164	LQ_MAX,
	165	};
	166
5aa33553 ES	167	struct rs_rate {
	168	int index;
	169	enum iwl_table_type type;
	170	u8 ant;
	171	u32 bw;
	172	bool sgi;
a3576ff2	173	bool ldpc;
d8bafeaf	174	bool stbc;
ba69d0e3	175	bool bfer;
5aa33553 ES	176	};
	177
	178
	179	#define is_type_legacy(type) (((type) == LQ_LEGACY_G) \|\| \
	180	((type) == LQ_LEGACY_A))
	181	#define is_type_ht_siso(type) ((type) == LQ_HT_SISO)
	182	#define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2)
	183	#define is_type_vht_siso(type) ((type) == LQ_VHT_SISO)
	184	#define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2)
	185	#define is_type_siso(type) (is_type_ht_siso(type) \|\| is_type_vht_siso(type))
	186	#define is_type_mimo2(type) (is_type_ht_mimo2(type) \|\| is_type_vht_mimo2(type))
	187	#define is_type_mimo(type) (is_type_mimo2(type))
	188	#define is_type_ht(type) (is_type_ht_siso(type) \|\| is_type_ht_mimo2(type))
	189	#define is_type_vht(type) (is_type_vht_siso(type) \|\| is_type_vht_mimo2(type))
	190	#define is_type_a_band(type) ((type) == LQ_LEGACY_A)
	191	#define is_type_g_band(type) ((type) == LQ_LEGACY_G)
	192
	193	#define is_legacy(rate) is_type_legacy((rate)->type)
	194	#define is_ht_siso(rate) is_type_ht_siso((rate)->type)
	195	#define is_ht_mimo2(rate) is_type_ht_mimo2((rate)->type)
	196	#define is_vht_siso(rate) is_type_vht_siso((rate)->type)
	197	#define is_vht_mimo2(rate) is_type_vht_mimo2((rate)->type)
	198	#define is_siso(rate) is_type_siso((rate)->type)
	199	#define is_mimo2(rate) is_type_mimo2((rate)->type)
	200	#define is_mimo(rate) is_type_mimo((rate)->type)
	201	#define is_ht(rate) is_type_ht((rate)->type)
	202	#define is_vht(rate) is_type_vht((rate)->type)
	203	#define is_a_band(rate) is_type_a_band((rate)->type)
	204	#define is_g_band(rate) is_type_g_band((rate)->type)
	205
	206	#define is_ht20(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_20)
	207	#define is_ht40(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_40)
	208	#define is_ht80(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_80)
855f492f	209	#define is_ht160(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_160)
8ca151b5 JB	210
	211	#define IWL_MAX_MCS_DISPLAY_SIZE 12
	212
	213	struct iwl_rate_mcs_info {
	214	char mbps[IWL_MAX_MCS_DISPLAY_SIZE];
	215	char mcs[IWL_MAX_MCS_DISPLAY_SIZE];
	216	};
	217
	218	/**
	219	* struct iwl_rate_scale_data -- tx success history for one rate
	220	*/
	221	struct iwl_rate_scale_data {
	222	u64 data; /* bitmap of successful frames */
	223	s32 success_counter; /* number of frames successful */
	224	s32 success_ratio; /* per-cent * 128 */
	225	s32 counter; /* number of frames attempted */
	226	s32 average_tpt; /* success ratio * expected throughput */
8ca151b5 JB	227	};
8ca151b5 JB	228
b3b06a32 ES	229	/* Possible Tx columns
	230	* Tx Column = a combo of legacy/siso/mimo x antenna x SGI
	231	*/
	232	enum rs_column {
	233	RS_COLUMN_LEGACY_ANT_A = 0,
	234	RS_COLUMN_LEGACY_ANT_B,
	235	RS_COLUMN_SISO_ANT_A,
	236	RS_COLUMN_SISO_ANT_B,
	237	RS_COLUMN_SISO_ANT_A_SGI,
	238	RS_COLUMN_SISO_ANT_B_SGI,
	239	RS_COLUMN_MIMO2,
	240	RS_COLUMN_MIMO2_SGI,
	241
	242	RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI,
757cf23b	243	RS_COLUMN_COUNT = RS_COLUMN_LAST + 1,
b3b06a32 ES	244	RS_COLUMN_INVALID,
	245	};
	246
1e9c62fa ES	247	enum rs_ss_force_opt {
	248	RS_SS_FORCE_NONE = 0,
	249	RS_SS_FORCE_STBC,
	250	RS_SS_FORCE_BFER,
	251	RS_SS_FORCE_SISO,
	252	};
	253
757cf23b ES	254	/* Packet stats per rate */
	255	struct rs_rate_stats {
	256	u64 success;
	257	u64 total;
	258	};
	259
8ca151b5 JB	260	/**
	261	* struct iwl_scale_tbl_info -- tx params and success history for all rates
	262	*
	263	* There are two of these in struct iwl_lq_sta,
	264	* one for "active", and one for "search".
	265	*/
	266	struct iwl_scale_tbl_info {
5aa33553	267	struct rs_rate rate;
b3b06a32	268	enum rs_column column;
a34529e8	269	const u16 expected_tpt; / throughput metrics; expected_tpt_G, etc. */
8ca151b5	270	struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
2fd647f8 EP	271	/* per txpower-reduction history */
2fd647f8 EP	272	struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1];
8ca151b5 JB	273	};
8ca151b5 JB	274
b3b06a32 ES	275	enum {
	276	RS_STATE_SEARCH_CYCLE_STARTED,
	277	RS_STATE_SEARCH_CYCLE_ENDED,
	278	RS_STATE_STAY_IN_COLUMN,
	279	};
	280
8ca151b5 JB	281	/**
	282	* struct iwl_lq_sta -- driver's rate scaling private structure
	283	*
	284	* Pointer to this gets passed back and forth between driver and mac80211.
	285	*/
	286	struct iwl_lq_sta {
	287	u8 active_tbl; /* index of active table, range 0-1 */
b3b06a32	288	u8 rs_state; /* RS_STATE_* */
8ca151b5 JB	289	u8 search_better_tbl; /* 1: currently trying alternate mode */
	290	s32 last_tpt;
	291
	292	/* The following determine when to search for a new mode */
	293	u32 table_count_limit;
	294	u32 max_failure_limit; /* # failed frames before new search */
	295	u32 max_success_limit; /* # successful frames before new search */
	296	u32 table_count;
	297	u32 total_failed; /* total failed frames, any/all rates */
	298	u32 total_success; /* total successful frames, any/all rates */
	299	u64 flush_timer; /* time staying in mode before new search */
	300
b3b06a32 ES	301	u32 visited_columns; /* Bitmask marking which Tx columns were
	302	* explored during a search cycle
	303	*/
87d5e415	304	u64 last_tx;
d310e405	305	bool is_vht;
a3576ff2	306	bool ldpc; /* LDPC Rx is supported by the STA */
3d44eebf ES	307	bool stbc_capable; /* Tx STBC is supported by chip and Rx by STA */
	308	bool bfer_capable; /* Remote supports beamformee and we BFer */
	309
57fbcce3	310	enum nl80211_band band;
8ca151b5 JB	311
8ca151b5 JB	312	/* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
198266a3 ES	313	unsigned long active_legacy_rate;
	314	unsigned long active_siso_rate;
	315	unsigned long active_mimo2_rate;
	316
	317	/* Highest rate per Tx mode */
	318	u8 max_legacy_rate_idx;
	319	u8 max_siso_rate_idx;
	320	u8 max_mimo2_rate_idx;
	321
b503ed60 ES	322	/* Optimal rate based on RSSI and STA caps.
	323	* Used only to reflect link speed to userspace.
	324	*/
	325	struct rs_rate optimal_rate;
	326	unsigned long optimal_rate_mask;
	327	const struct rs_init_rate_info *optimal_rates;
	328	int optimal_nentries;
	329
8ca151b5 JB	330	u8 missed_rate_counter;
	331
	332	struct iwl_lq_cmd lq;
	333	struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
8ca151b5	334	u8 tx_agg_tid_en;
8ca151b5	335
8ca151b5 JB	336	/* last tx rate_n_flags */
	337	u32 last_rate_n_flags;
	338	/* packets destined for this STA are aggregated */
	339	u8 is_agg;
2fd647f8 EP	340
	341	/* tx power reduce for this sta */
	342	int tpc_reduce;
ae969afe EP	343
ae969afe EP	344	/* persistent fields - initialized only once - keep last! */
f58220f6	345	struct lq_sta_pers {
ae969afe	346	#ifdef CONFIG_MAC80211_DEBUGFS
ae969afe EP	347	u32 dbg_fixed_rate;
ae969afe EP	348	u8 dbg_fixed_txp_reduction;
878985ce ES	349
	350	/* force STBC/BFER/SISO for testing */
	351	enum rs_ss_force_opt ss_force;
ae969afe	352	#endif
f58220f6 ES	353	u8 chains;
f58220f6 ES	354	s8 chain_signal[IEEE80211_MAX_CHAINS];
b503ed60	355	s8 last_rssi;
f58220f6	356	struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT];
ae969afe EP	357	struct iwl_mvm *drv;
ae969afe EP	358	} pers;
36946ce6 EG	359	};
36946ce6 EG	360
ea42d1cb GG	361	/* ieee80211_tx_info's status_driver_data[0] is packed with lq color and txp
	362	* Note, it's iwlmvm <-> mac80211 interface.
	363	* bits 0-7: reduced tx power
	364	* bits 8-10: LQ command's color
	365	*/
	366	#define RS_DRV_DATA_TXP_MSK 0xff
	367	#define RS_DRV_DATA_LQ_COLOR_POS 8
	368	#define RS_DRV_DATA_LQ_COLOR_MSK (7 << RS_DRV_DATA_LQ_COLOR_POS)
	369	#define RS_DRV_DATA_LQ_COLOR_GET(_f) (((_f) & RS_DRV_DATA_LQ_COLOR_MSK) >>\
	370	RS_DRV_DATA_LQ_COLOR_POS)
	371	#define RS_DRV_DATA_PACK(_c, _p) ((void *)(uintptr_t)\
	372	(((uintptr_t)_p) \|\
	373	((_c) << RS_DRV_DATA_LQ_COLOR_POS)))
	374
8ca151b5	375	/* Initialize station's rate scaling information after adding station */
b3818394	376	void iwl_mvm_rs_rate_init(struct iwl_mvm mvm, struct ieee80211_sta sta,
57fbcce3	377	enum nl80211_band band, bool init);
8ca151b5	378
1ebc8f2e ES	379	/* Notify RS about Tx status */
1ebc8f2e ES	380	void iwl_mvm_rs_tx_status(struct iwl_mvm mvm, struct ieee80211_sta sta,
ff7a68d0	381	int tid, struct ieee80211_tx_info *info, bool ndp);
1ebc8f2e	382
8ca151b5 JB	383	/**
	384	* iwl_rate_control_register - Register the rate control algorithm callbacks
	385	*
	386	* Since the rate control algorithm is hardware specific, there is no need
	387	* or reason to place it as a stand alone module. The driver can call
	388	* iwl_rate_control_register in order to register the rate control callbacks
	389	* with the mac80211 subsystem. This should be performed prior to calling
	390	* ieee80211_register_hw
	391	*
	392	*/
b3818394	393	int iwl_mvm_rate_control_register(void);
8ca151b5 JB	394
	395	/**
	396	* iwl_rate_control_unregister - Unregister the rate control callbacks
	397	*
	398	* This should be called after calling ieee80211_unregister_hw, but before
	399	* the driver is unloaded.
	400	*/
b3818394	401	void iwl_mvm_rate_control_unregister(void);
8ca151b5	402
9ee718aa EL	403	struct iwl_mvm_sta;
9ee718aa EL	404
e126b5d9 JB	405	int iwl_mvm_tx_protection(struct iwl_mvm mvm, struct iwl_mvm_sta mvmsta,
e126b5d9 JB	406	bool enable);
9ee718aa	407
8ca151b5	408	#endif /* __rs__ */