427 lines
13 KiB
C
427 lines
13 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 <linuxwifi@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 __iwl_agn_rs_h__
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#define __iwl_agn_rs_h__
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#include <net/mac80211.h>
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#include "iwl-config.h"
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#include "commands.h"
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struct iwl_rate_info {
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u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */
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u8 plcp_siso; /* uCode API: IWL_RATE_SISO_6M_PLCP, etc. */
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u8 plcp_mimo2; /* uCode API: IWL_RATE_MIMO2_6M_PLCP, etc. */
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u8 plcp_mimo3; /* uCode API: IWL_RATE_MIMO3_6M_PLCP, etc. */
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u8 ieee; /* MAC header: IWL_RATE_6M_IEEE, etc. */
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u8 prev_ieee; /* previous rate in IEEE speeds */
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u8 next_ieee; /* next rate in IEEE speeds */
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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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u8 prev_rs_tgg; /* previous rate used in TGG rs algo */
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u8 next_rs_tgg; /* next rate used in TGG rs algo */
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};
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/*
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* These serve as indexes into
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* struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
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*/
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enum {
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IWL_RATE_1M_INDEX = 0,
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IWL_RATE_2M_INDEX,
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IWL_RATE_5M_INDEX,
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IWL_RATE_11M_INDEX,
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IWL_RATE_6M_INDEX,
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IWL_RATE_9M_INDEX,
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IWL_RATE_12M_INDEX,
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IWL_RATE_18M_INDEX,
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IWL_RATE_24M_INDEX,
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IWL_RATE_36M_INDEX,
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IWL_RATE_48M_INDEX,
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IWL_RATE_54M_INDEX,
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IWL_RATE_60M_INDEX,
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IWL_RATE_COUNT, /*FIXME:RS:change to IWL_RATE_INDEX_COUNT,*/
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IWL_RATE_COUNT_LEGACY = IWL_RATE_COUNT - 1, /* Excluding 60M */
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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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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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enum {
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IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
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IWL_LAST_OFDM_RATE = IWL_RATE_60M_INDEX,
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IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
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IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
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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 legacy bit rates, both OFDM and CCK */
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enum {
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IWL_RATE_6M_PLCP = 13,
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IWL_RATE_9M_PLCP = 15,
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IWL_RATE_12M_PLCP = 5,
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IWL_RATE_18M_PLCP = 7,
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IWL_RATE_24M_PLCP = 9,
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IWL_RATE_36M_PLCP = 11,
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IWL_RATE_48M_PLCP = 1,
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IWL_RATE_54M_PLCP = 3,
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IWL_RATE_60M_PLCP = 3,/*FIXME:RS:should be removed*/
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IWL_RATE_1M_PLCP = 10,
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IWL_RATE_2M_PLCP = 20,
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IWL_RATE_5M_PLCP = 55,
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IWL_RATE_11M_PLCP = 110,
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/*FIXME:RS:change to IWL_RATE_LEGACY_??M_PLCP */
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/*FIXME:RS:add IWL_RATE_LEGACY_INVM_PLCP = 0,*/
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};
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/* uCode API values for OFDM high-throughput (HT) bit rates */
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enum {
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IWL_RATE_SISO_6M_PLCP = 0,
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IWL_RATE_SISO_12M_PLCP = 1,
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IWL_RATE_SISO_18M_PLCP = 2,
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IWL_RATE_SISO_24M_PLCP = 3,
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IWL_RATE_SISO_36M_PLCP = 4,
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IWL_RATE_SISO_48M_PLCP = 5,
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IWL_RATE_SISO_54M_PLCP = 6,
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IWL_RATE_SISO_60M_PLCP = 7,
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IWL_RATE_MIMO2_6M_PLCP = 0x8,
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IWL_RATE_MIMO2_12M_PLCP = 0x9,
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IWL_RATE_MIMO2_18M_PLCP = 0xa,
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IWL_RATE_MIMO2_24M_PLCP = 0xb,
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IWL_RATE_MIMO2_36M_PLCP = 0xc,
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IWL_RATE_MIMO2_48M_PLCP = 0xd,
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IWL_RATE_MIMO2_54M_PLCP = 0xe,
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IWL_RATE_MIMO2_60M_PLCP = 0xf,
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IWL_RATE_MIMO3_6M_PLCP = 0x10,
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IWL_RATE_MIMO3_12M_PLCP = 0x11,
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IWL_RATE_MIMO3_18M_PLCP = 0x12,
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IWL_RATE_MIMO3_24M_PLCP = 0x13,
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IWL_RATE_MIMO3_36M_PLCP = 0x14,
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IWL_RATE_MIMO3_48M_PLCP = 0x15,
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IWL_RATE_MIMO3_54M_PLCP = 0x16,
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IWL_RATE_MIMO3_60M_PLCP = 0x17,
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IWL_RATE_SISO_INVM_PLCP,
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IWL_RATE_MIMO2_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
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IWL_RATE_MIMO3_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
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};
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/* MAC header values for bit rates */
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enum {
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IWL_RATE_6M_IEEE = 12,
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IWL_RATE_9M_IEEE = 18,
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IWL_RATE_12M_IEEE = 24,
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IWL_RATE_18M_IEEE = 36,
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IWL_RATE_24M_IEEE = 48,
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IWL_RATE_36M_IEEE = 72,
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IWL_RATE_48M_IEEE = 96,
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IWL_RATE_54M_IEEE = 108,
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IWL_RATE_60M_IEEE = 120,
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IWL_RATE_1M_IEEE = 2,
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IWL_RATE_2M_IEEE = 4,
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IWL_RATE_5M_IEEE = 11,
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IWL_RATE_11M_IEEE = 22,
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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 IWL_RATE_DECREASE_TH 1920 /* 15% */
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/* possible actions when in legacy mode */
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#define IWL_LEGACY_SWITCH_ANTENNA1 0
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#define IWL_LEGACY_SWITCH_ANTENNA2 1
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#define IWL_LEGACY_SWITCH_SISO 2
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#define IWL_LEGACY_SWITCH_MIMO2_AB 3
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#define IWL_LEGACY_SWITCH_MIMO2_AC 4
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#define IWL_LEGACY_SWITCH_MIMO2_BC 5
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#define IWL_LEGACY_SWITCH_MIMO3_ABC 6
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/* possible actions when in siso mode */
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#define IWL_SISO_SWITCH_ANTENNA1 0
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#define IWL_SISO_SWITCH_ANTENNA2 1
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#define IWL_SISO_SWITCH_MIMO2_AB 2
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#define IWL_SISO_SWITCH_MIMO2_AC 3
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#define IWL_SISO_SWITCH_MIMO2_BC 4
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#define IWL_SISO_SWITCH_GI 5
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#define IWL_SISO_SWITCH_MIMO3_ABC 6
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/* possible actions when in mimo mode */
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#define IWL_MIMO2_SWITCH_ANTENNA1 0
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#define IWL_MIMO2_SWITCH_ANTENNA2 1
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#define IWL_MIMO2_SWITCH_SISO_A 2
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#define IWL_MIMO2_SWITCH_SISO_B 3
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#define IWL_MIMO2_SWITCH_SISO_C 4
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#define IWL_MIMO2_SWITCH_GI 5
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#define IWL_MIMO2_SWITCH_MIMO3_ABC 6
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/* possible actions when in mimo3 mode */
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#define IWL_MIMO3_SWITCH_ANTENNA1 0
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#define IWL_MIMO3_SWITCH_ANTENNA2 1
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#define IWL_MIMO3_SWITCH_SISO_A 2
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#define IWL_MIMO3_SWITCH_SISO_B 3
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#define IWL_MIMO3_SWITCH_SISO_C 4
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#define IWL_MIMO3_SWITCH_MIMO2_AB 5
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#define IWL_MIMO3_SWITCH_MIMO2_AC 6
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#define IWL_MIMO3_SWITCH_MIMO2_BC 7
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#define IWL_MIMO3_SWITCH_GI 8
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#define IWL_MAX_11N_MIMO3_SEARCH IWL_MIMO3_SWITCH_GI
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#define IWL_MAX_SEARCH IWL_MIMO2_SWITCH_MIMO3_ABC
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/*FIXME:RS:add possible actions for MIMO3*/
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#define IWL_ACTION_LIMIT 3 /* # possible actions */
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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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extern const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT];
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enum iwl_table_type {
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LQ_NONE,
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LQ_G, /* legacy types */
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LQ_A,
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LQ_SISO, /* high-throughput types */
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LQ_MIMO2,
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LQ_MIMO3,
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LQ_MAX,
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};
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#define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
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#define is_siso(tbl) ((tbl) == LQ_SISO)
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#define is_mimo2(tbl) ((tbl) == LQ_MIMO2)
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#define is_mimo3(tbl) ((tbl) == LQ_MIMO3)
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#define is_mimo(tbl) (is_mimo2(tbl) || is_mimo3(tbl))
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#define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
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#define is_a_band(tbl) ((tbl) == LQ_A)
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#define is_g_and(tbl) ((tbl) == LQ_G)
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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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unsigned long stamp;
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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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enum iwl_table_type lq_type;
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u8 ant_type;
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u8 is_SGI; /* 1 = short guard interval */
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u8 is_ht40; /* 1 = 40 MHz channel width */
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u8 is_dup; /* 1 = duplicated data streams */
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u8 action; /* change modulation; IWL_[LEGACY/SISO/MIMO]_SWITCH_* */
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u8 max_search; /* maximun number of tables we can search */
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const u16 *expected_tpt; /* throughput metrics; expected_tpt_G, etc. */
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u32 current_rate; /* rate_n_flags, uCode API format */
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struct iwl_rate_scale_data win[IWL_RATE_COUNT]; /* rate histories */
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};
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struct iwl_traffic_load {
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unsigned long time_stamp; /* age of the oldest statistics */
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u32 packet_count[TID_QUEUE_MAX_SIZE]; /* packet count in this time
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* slice */
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u32 total; /* total num of packets during the
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* last TID_MAX_TIME_DIFF */
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u8 queue_count; /* number of queues that has
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* been used since the last cleanup */
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u8 head; /* start of the circular buffer */
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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 enable_counter; /* indicates HT mode */
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u8 stay_in_tbl; /* 1: disallow, 0: allow search for new mode */
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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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u8 action_counter; /* # mode-switch actions tried */
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u8 is_green;
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u8 is_dup;
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enum nl80211_band band;
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/* The following are bitmaps of rates; IWL_RATE_6M_MASK, etc. */
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u32 supp_rates;
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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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u16 active_mimo3_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_link_quality_cmd lq;
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struct iwl_scale_tbl_info lq_info[LQ_SIZE]; /* "active", "search" */
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struct iwl_traffic_load load[IWL_MAX_TID_COUNT];
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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_rate_scale_data_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_priv *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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/* BT traffic this sta was last updated in */
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u8 last_bt_traffic;
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};
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static inline u8 first_antenna(u8 mask)
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{
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if (mask & ANT_A)
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return ANT_A;
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if (mask & ANT_B)
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return ANT_B;
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return ANT_C;
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}
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/* Initialize station's rate scaling information after adding station */
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void iwl_rs_rate_init(struct iwl_priv *priv, struct ieee80211_sta *sta,
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u8 sta_id);
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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 iwlagn_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 iwlagn_rate_control_unregister(void);
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#endif /* __iwl_agn__rs__ */
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