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2536e7c350
linux/drivers/net/wireless/iwlwifi/mvm/rs.h
Eyal Shapira 2536e7c350 iwlwifi: mvm: rs: remove max_rate_idx 
max_rate_idx constraint is deprecated and it's handling is
faulty as well as it is relevant only for legacy rates but
was considered in HT/VHT. In most cases there was no side effect
as max_rate_idx was set to -1 but in certain cases like P2P
it got set to an actual rate idx which would limit the maximum
rate in HT/VHT by mistake.
max_rate_idx should be replaced by the masks fields but for
now remove it.

Signed-off-by: Eyal Shapira <eyalx.shapira@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2014-09-14 12:56:37 +03:00

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/******************************************************************************
*
* 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;
struct rs_rate_stats tx_stats[RS_COLUMN_COUNT][IWL_RATE_COUNT];
/* 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 {
#ifdef CONFIG_MAC80211_DEBUGFS
u32 dbg_fixed_rate;
u8 dbg_fixed_txp_reduction;
#endif
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);
/**
* 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__ */
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