forked from Minki/linux
2fd647f85d
Implement Adaptive Tx Power Control algorithm. ATPC basically tries to decrease the tx power as much as possible while the throughput is not being hurt. Signed-off-by: Eliad Peller <eliadx.peller@intel.com> Reviewed-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
384 lines
12 KiB
C
384 lines
12 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*****************************************************************************/
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#ifndef __rs_h__
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#define __rs_h__
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#include <net/mac80211.h>
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#include "iwl-config.h"
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#include "fw-api.h"
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#include "iwl-trans.h"
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struct iwl_rs_rate_info {
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u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */
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u8 plcp_ht_siso; /* uCode API: IWL_RATE_SISO_6M_PLCP, etc. */
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u8 plcp_ht_mimo2; /* uCode API: IWL_RATE_MIMO2_6M_PLCP, etc. */
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u8 plcp_vht_siso;
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u8 plcp_vht_mimo2;
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u8 prev_rs; /* previous rate used in rs algo */
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u8 next_rs; /* next rate used in rs algo */
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};
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#define IWL_RATE_60M_PLCP 3
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enum {
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IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
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IWL_RATE_INVALID = IWL_RATE_COUNT,
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};
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#define LINK_QUAL_MAX_RETRY_NUM 16
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enum {
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IWL_RATE_6M_INDEX_TABLE = 0,
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IWL_RATE_9M_INDEX_TABLE,
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IWL_RATE_12M_INDEX_TABLE,
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IWL_RATE_18M_INDEX_TABLE,
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IWL_RATE_24M_INDEX_TABLE,
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IWL_RATE_36M_INDEX_TABLE,
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IWL_RATE_48M_INDEX_TABLE,
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IWL_RATE_54M_INDEX_TABLE,
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IWL_RATE_1M_INDEX_TABLE,
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IWL_RATE_2M_INDEX_TABLE,
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IWL_RATE_5M_INDEX_TABLE,
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IWL_RATE_11M_INDEX_TABLE,
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IWL_RATE_INVM_INDEX_TABLE = IWL_RATE_INVM_INDEX - 1,
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};
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/* #define vs. enum to keep from defaulting to 'large integer' */
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#define IWL_RATE_6M_MASK (1 << IWL_RATE_6M_INDEX)
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#define IWL_RATE_9M_MASK (1 << IWL_RATE_9M_INDEX)
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#define IWL_RATE_12M_MASK (1 << IWL_RATE_12M_INDEX)
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#define IWL_RATE_18M_MASK (1 << IWL_RATE_18M_INDEX)
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#define IWL_RATE_24M_MASK (1 << IWL_RATE_24M_INDEX)
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#define IWL_RATE_36M_MASK (1 << IWL_RATE_36M_INDEX)
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#define IWL_RATE_48M_MASK (1 << IWL_RATE_48M_INDEX)
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#define IWL_RATE_54M_MASK (1 << IWL_RATE_54M_INDEX)
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#define IWL_RATE_60M_MASK (1 << IWL_RATE_60M_INDEX)
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#define IWL_RATE_1M_MASK (1 << IWL_RATE_1M_INDEX)
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#define IWL_RATE_2M_MASK (1 << IWL_RATE_2M_INDEX)
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#define IWL_RATE_5M_MASK (1 << IWL_RATE_5M_INDEX)
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#define IWL_RATE_11M_MASK (1 << IWL_RATE_11M_INDEX)
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/* uCode API values for HT/VHT bit rates */
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enum {
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IWL_RATE_HT_SISO_MCS_0_PLCP = 0,
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IWL_RATE_HT_SISO_MCS_1_PLCP = 1,
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IWL_RATE_HT_SISO_MCS_2_PLCP = 2,
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IWL_RATE_HT_SISO_MCS_3_PLCP = 3,
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IWL_RATE_HT_SISO_MCS_4_PLCP = 4,
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IWL_RATE_HT_SISO_MCS_5_PLCP = 5,
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IWL_RATE_HT_SISO_MCS_6_PLCP = 6,
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IWL_RATE_HT_SISO_MCS_7_PLCP = 7,
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IWL_RATE_HT_MIMO2_MCS_0_PLCP = 0x8,
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IWL_RATE_HT_MIMO2_MCS_1_PLCP = 0x9,
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IWL_RATE_HT_MIMO2_MCS_2_PLCP = 0xA,
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IWL_RATE_HT_MIMO2_MCS_3_PLCP = 0xB,
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IWL_RATE_HT_MIMO2_MCS_4_PLCP = 0xC,
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IWL_RATE_HT_MIMO2_MCS_5_PLCP = 0xD,
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IWL_RATE_HT_MIMO2_MCS_6_PLCP = 0xE,
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IWL_RATE_HT_MIMO2_MCS_7_PLCP = 0xF,
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IWL_RATE_VHT_SISO_MCS_0_PLCP = 0,
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IWL_RATE_VHT_SISO_MCS_1_PLCP = 1,
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IWL_RATE_VHT_SISO_MCS_2_PLCP = 2,
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IWL_RATE_VHT_SISO_MCS_3_PLCP = 3,
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IWL_RATE_VHT_SISO_MCS_4_PLCP = 4,
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IWL_RATE_VHT_SISO_MCS_5_PLCP = 5,
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IWL_RATE_VHT_SISO_MCS_6_PLCP = 6,
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IWL_RATE_VHT_SISO_MCS_7_PLCP = 7,
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IWL_RATE_VHT_SISO_MCS_8_PLCP = 8,
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IWL_RATE_VHT_SISO_MCS_9_PLCP = 9,
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IWL_RATE_VHT_MIMO2_MCS_0_PLCP = 0x10,
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IWL_RATE_VHT_MIMO2_MCS_1_PLCP = 0x11,
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IWL_RATE_VHT_MIMO2_MCS_2_PLCP = 0x12,
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IWL_RATE_VHT_MIMO2_MCS_3_PLCP = 0x13,
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IWL_RATE_VHT_MIMO2_MCS_4_PLCP = 0x14,
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IWL_RATE_VHT_MIMO2_MCS_5_PLCP = 0x15,
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IWL_RATE_VHT_MIMO2_MCS_6_PLCP = 0x16,
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IWL_RATE_VHT_MIMO2_MCS_7_PLCP = 0x17,
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IWL_RATE_VHT_MIMO2_MCS_8_PLCP = 0x18,
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IWL_RATE_VHT_MIMO2_MCS_9_PLCP = 0x19,
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IWL_RATE_HT_SISO_MCS_INV_PLCP,
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IWL_RATE_HT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
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IWL_RATE_VHT_SISO_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
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IWL_RATE_VHT_MIMO2_MCS_INV_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
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IWL_RATE_HT_SISO_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
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IWL_RATE_HT_SISO_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
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IWL_RATE_HT_MIMO2_MCS_8_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
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IWL_RATE_HT_MIMO2_MCS_9_PLCP = IWL_RATE_HT_SISO_MCS_INV_PLCP,
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};
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#define IWL_RATES_MASK ((1 << IWL_RATE_COUNT) - 1)
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#define IWL_INVALID_VALUE -1
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#define IWL_MIN_RSSI_VAL -100
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#define IWL_MAX_RSSI_VAL 0
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/* These values specify how many Tx frame attempts before
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* searching for a new modulation mode */
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#define IWL_LEGACY_FAILURE_LIMIT 160
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#define IWL_LEGACY_SUCCESS_LIMIT 480
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#define IWL_LEGACY_TABLE_COUNT 160
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#define IWL_NONE_LEGACY_FAILURE_LIMIT 400
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#define IWL_NONE_LEGACY_SUCCESS_LIMIT 4500
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#define IWL_NONE_LEGACY_TABLE_COUNT 1500
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/* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
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#define IWL_RS_GOOD_RATIO 12800 /* 100% */
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#define IWL_RATE_SCALE_SWITCH 10880 /* 85% */
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#define IWL_RATE_HIGH_TH 10880 /* 85% */
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#define IWL_RATE_INCREASE_TH 6400 /* 50% */
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#define RS_SR_FORCE_DECREASE 1920 /* 15% */
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#define TPC_SR_FORCE_INCREASE 9600 /* 75% */
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#define TPC_SR_NO_INCREASE 10880 /* 85% */
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#define TPC_TX_POWER_STEP 3
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#define TPC_MAX_REDUCTION 15
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#define TPC_NO_REDUCTION 0
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#define TPC_INVALID 0xff
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#define LINK_QUAL_AGG_TIME_LIMIT_DEF (4000) /* 4 milliseconds */
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#define LINK_QUAL_AGG_TIME_LIMIT_MAX (8000)
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#define LINK_QUAL_AGG_TIME_LIMIT_MIN (100)
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#define LINK_QUAL_AGG_DISABLE_START_DEF (3)
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#define LINK_QUAL_AGG_DISABLE_START_MAX (255)
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#define LINK_QUAL_AGG_DISABLE_START_MIN (0)
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#define LINK_QUAL_AGG_FRAME_LIMIT_DEF (63)
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#define LINK_QUAL_AGG_FRAME_LIMIT_MAX (63)
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#define LINK_QUAL_AGG_FRAME_LIMIT_MIN (0)
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#define LQ_SIZE 2 /* 2 mode tables: "Active" and "Search" */
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/* load per tid defines for A-MPDU activation */
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#define IWL_AGG_TPT_THREHOLD 0
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#define IWL_AGG_LOAD_THRESHOLD 10
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#define IWL_AGG_ALL_TID 0xff
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#define TID_QUEUE_CELL_SPACING 50 /*mS */
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#define TID_QUEUE_MAX_SIZE 20
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#define TID_ROUND_VALUE 5 /* mS */
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#define TID_MAX_TIME_DIFF ((TID_QUEUE_MAX_SIZE - 1) * TID_QUEUE_CELL_SPACING)
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#define TIME_WRAP_AROUND(x, y) (((y) > (x)) ? (y) - (x) : (0-(x)) + (y))
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enum iwl_table_type {
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LQ_NONE,
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LQ_LEGACY_G, /* legacy types */
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LQ_LEGACY_A,
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LQ_HT_SISO, /* HT types */
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LQ_HT_MIMO2,
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LQ_VHT_SISO, /* VHT types */
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LQ_VHT_MIMO2,
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LQ_MAX,
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};
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struct rs_rate {
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int index;
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enum iwl_table_type type;
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u8 ant;
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u32 bw;
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bool sgi;
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};
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#define is_type_legacy(type) (((type) == LQ_LEGACY_G) || \
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((type) == LQ_LEGACY_A))
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#define is_type_ht_siso(type) ((type) == LQ_HT_SISO)
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#define is_type_ht_mimo2(type) ((type) == LQ_HT_MIMO2)
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#define is_type_vht_siso(type) ((type) == LQ_VHT_SISO)
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#define is_type_vht_mimo2(type) ((type) == LQ_VHT_MIMO2)
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#define is_type_siso(type) (is_type_ht_siso(type) || is_type_vht_siso(type))
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#define is_type_mimo2(type) (is_type_ht_mimo2(type) || is_type_vht_mimo2(type))
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#define is_type_mimo(type) (is_type_mimo2(type))
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#define is_type_ht(type) (is_type_ht_siso(type) || is_type_ht_mimo2(type))
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#define is_type_vht(type) (is_type_vht_siso(type) || is_type_vht_mimo2(type))
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#define is_type_a_band(type) ((type) == LQ_LEGACY_A)
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#define is_type_g_band(type) ((type) == LQ_LEGACY_G)
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#define is_legacy(rate) is_type_legacy((rate)->type)
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#define is_ht_siso(rate) is_type_ht_siso((rate)->type)
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#define is_ht_mimo2(rate) is_type_ht_mimo2((rate)->type)
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#define is_vht_siso(rate) is_type_vht_siso((rate)->type)
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#define is_vht_mimo2(rate) is_type_vht_mimo2((rate)->type)
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#define is_siso(rate) is_type_siso((rate)->type)
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#define is_mimo2(rate) is_type_mimo2((rate)->type)
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#define is_mimo(rate) is_type_mimo((rate)->type)
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#define is_ht(rate) is_type_ht((rate)->type)
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#define is_vht(rate) is_type_vht((rate)->type)
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#define is_a_band(rate) is_type_a_band((rate)->type)
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#define is_g_band(rate) is_type_g_band((rate)->type)
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#define is_ht20(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_20)
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#define is_ht40(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_40)
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#define is_ht80(rate) ((rate)->bw == RATE_MCS_CHAN_WIDTH_80)
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#define IWL_MAX_MCS_DISPLAY_SIZE 12
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struct iwl_rate_mcs_info {
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char mbps[IWL_MAX_MCS_DISPLAY_SIZE];
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char mcs[IWL_MAX_MCS_DISPLAY_SIZE];
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};
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/**
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* struct iwl_rate_scale_data -- tx success history for one rate
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*/
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struct iwl_rate_scale_data {
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u64 data; /* bitmap of successful frames */
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s32 success_counter; /* number of frames successful */
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s32 success_ratio; /* per-cent * 128 */
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s32 counter; /* number of frames attempted */
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s32 average_tpt; /* success ratio * expected throughput */
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};
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/* Possible Tx columns
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* Tx Column = a combo of legacy/siso/mimo x antenna x SGI
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*/
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enum rs_column {
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RS_COLUMN_LEGACY_ANT_A = 0,
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RS_COLUMN_LEGACY_ANT_B,
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RS_COLUMN_SISO_ANT_A,
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RS_COLUMN_SISO_ANT_B,
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RS_COLUMN_SISO_ANT_A_SGI,
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RS_COLUMN_SISO_ANT_B_SGI,
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RS_COLUMN_MIMO2,
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RS_COLUMN_MIMO2_SGI,
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RS_COLUMN_LAST = RS_COLUMN_MIMO2_SGI,
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RS_COLUMN_INVALID,
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};
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/**
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* struct iwl_scale_tbl_info -- tx params and success history for all rates
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*
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* There are two of these in struct iwl_lq_sta,
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* one for "active", and one for "search".
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*/
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struct iwl_scale_tbl_info {
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struct rs_rate rate;
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enum rs_column column;
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const u16 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */
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struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
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/* per txpower-reduction history */
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struct iwl_rate_scale_data tpc_win[TPC_MAX_REDUCTION + 1];
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};
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enum {
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RS_STATE_SEARCH_CYCLE_STARTED,
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RS_STATE_SEARCH_CYCLE_ENDED,
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RS_STATE_STAY_IN_COLUMN,
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};
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/**
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* struct iwl_lq_sta -- driver's rate scaling private structure
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*
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* Pointer to this gets passed back and forth between driver and mac80211.
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*/
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struct iwl_lq_sta {
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u8 active_tbl; /* index of active table, range 0-1 */
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u8 rs_state; /* RS_STATE_* */
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u8 search_better_tbl; /* 1: currently trying alternate mode */
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s32 last_tpt;
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/* The following determine when to search for a new mode */
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u32 table_count_limit;
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u32 max_failure_limit; /* # failed frames before new search */
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u32 max_success_limit; /* # successful frames before new search */
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u32 table_count;
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u32 total_failed; /* total failed frames, any/all rates */
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u32 total_success; /* total successful frames, any/all rates */
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u64 flush_timer; /* time staying in mode before new search */
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u32 visited_columns; /* Bitmask marking which Tx columns were
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* explored during a search cycle
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*/
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bool is_vht;
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enum ieee80211_band band;
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/* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
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u16 active_legacy_rate;
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u16 active_siso_rate;
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u16 active_mimo2_rate;
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s8 max_rate_idx; /* Max rate set by user */
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u8 missed_rate_counter;
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struct iwl_lq_cmd lq;
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struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
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u8 tx_agg_tid_en;
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#ifdef CONFIG_MAC80211_DEBUGFS
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struct dentry *rs_sta_dbgfs_scale_table_file;
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struct dentry *rs_sta_dbgfs_stats_table_file;
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struct dentry *rs_sta_dbgfs_tx_agg_tid_en_file;
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u32 dbg_fixed_rate;
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#endif
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struct iwl_mvm *drv;
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/* used to be in sta_info */
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int last_txrate_idx;
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/* last tx rate_n_flags */
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u32 last_rate_n_flags;
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/* packets destined for this STA are aggregated */
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u8 is_agg;
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/* tx power reduce for this sta */
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int tpc_reduce;
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};
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/* Initialize station's rate scaling information after adding station */
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void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
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enum ieee80211_band band, bool init);
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/**
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* iwl_rate_control_register - Register the rate control algorithm callbacks
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*
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* Since the rate control algorithm is hardware specific, there is no need
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* or reason to place it as a stand alone module. The driver can call
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* iwl_rate_control_register in order to register the rate control callbacks
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* with the mac80211 subsystem. This should be performed prior to calling
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* ieee80211_register_hw
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*
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*/
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int iwl_mvm_rate_control_register(void);
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/**
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* iwl_rate_control_unregister - Unregister the rate control callbacks
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*
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* This should be called after calling ieee80211_unregister_hw, but before
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* the driver is unloaded.
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*/
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void iwl_mvm_rate_control_unregister(void);
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struct iwl_mvm_sta;
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int iwl_mvm_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
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bool enable);
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#endif /* __rs__ */
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