1489 lines
43 KiB
C
1489 lines
43 KiB
C
/*
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* Copyright (c) 2004 Video54 Technologies, Inc.
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* Copyright (c) 2004-2011 Atheros Communications, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/slab.h>
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#include <linux/export.h>
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#include "ath9k.h"
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static const struct ath_rate_table ar5416_11na_ratetable = {
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68,
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8, /* MCS start */
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{
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[0] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 6000,
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5400, 0, 12 }, /* 6 Mb */
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[1] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 9000,
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7800, 1, 18 }, /* 9 Mb */
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[2] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000,
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10000, 2, 24 }, /* 12 Mb */
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[3] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000,
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13900, 3, 36 }, /* 18 Mb */
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[4] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000,
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17300, 4, 48 }, /* 24 Mb */
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[5] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000,
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23000, 5, 72 }, /* 36 Mb */
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[6] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000,
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27400, 6, 96 }, /* 48 Mb */
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[7] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000,
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29300, 7, 108 }, /* 54 Mb */
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[8] = { RC_HT_SDT_2040, WLAN_RC_PHY_HT_20_SS, 6500,
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6400, 0, 0 }, /* 6.5 Mb */
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[9] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 13000,
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12700, 1, 1 }, /* 13 Mb */
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[10] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 19500,
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18800, 2, 2 }, /* 19.5 Mb */
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[11] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000,
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25000, 3, 3 }, /* 26 Mb */
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[12] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000,
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36700, 4, 4 }, /* 39 Mb */
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[13] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000,
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48100, 5, 5 }, /* 52 Mb */
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[14] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500,
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53500, 6, 6 }, /* 58.5 Mb */
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[15] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000,
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59000, 7, 7 }, /* 65 Mb */
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[16] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS_HGI, 72200,
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65400, 7, 7 }, /* 75 Mb */
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[17] = { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000,
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12700, 8, 8 }, /* 13 Mb */
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[18] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 26000,
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24800, 9, 9 }, /* 26 Mb */
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[19] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 39000,
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36600, 10, 10 }, /* 39 Mb */
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[20] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 52000,
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48100, 11, 11 }, /* 52 Mb */
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[21] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 78000,
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69500, 12, 12 }, /* 78 Mb */
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[22] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 104000,
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89500, 13, 13 }, /* 104 Mb */
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[23] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 117000,
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98900, 14, 14 }, /* 117 Mb */
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[24] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 130000,
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108300, 15, 15 }, /* 130 Mb */
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[25] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400,
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120000, 15, 15 }, /* 144.4 Mb */
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[26] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 19500,
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17400, 16, 16 }, /* 19.5 Mb */
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[27] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 39000,
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35100, 17, 17 }, /* 39 Mb */
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[28] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 58500,
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52600, 18, 18 }, /* 58.5 Mb */
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[29] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 78000,
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70400, 19, 19 }, /* 78 Mb */
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[30] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 117000,
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104900, 20, 20 }, /* 117 Mb */
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[31] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS_HGI, 130000,
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115800, 20, 20 }, /* 130 Mb*/
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[32] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 156000,
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137200, 21, 21 }, /* 156 Mb */
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[33] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 173300,
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151100, 21, 21 }, /* 173.3 Mb */
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[34] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 175500,
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152800, 22, 22 }, /* 175.5 Mb */
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[35] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 195000,
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168400, 22, 22 }, /* 195 Mb*/
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[36] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 195000,
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168400, 23, 23 }, /* 195 Mb */
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[37] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 216700,
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185000, 23, 23 }, /* 216.7 Mb */
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[38] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 13500,
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13200, 0, 0 }, /* 13.5 Mb*/
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[39] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 27500,
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25900, 1, 1 }, /* 27.0 Mb*/
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[40] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 40500,
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38600, 2, 2 }, /* 40.5 Mb*/
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[41] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000,
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49800, 3, 3 }, /* 54 Mb */
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[42] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500,
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72200, 4, 4 }, /* 81 Mb */
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[43] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 108000,
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92900, 5, 5 }, /* 108 Mb */
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[44] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500,
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102700, 6, 6 }, /* 121.5 Mb*/
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[45] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000,
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112000, 7, 7 }, /* 135 Mb */
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[46] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000,
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122000, 7, 7 }, /* 150 Mb */
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[47] = { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000,
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25800, 8, 8 }, /* 27 Mb */
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[48] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 54000,
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49800, 9, 9 }, /* 54 Mb */
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[49] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 81000,
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71900, 10, 10 }, /* 81 Mb */
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[50] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 108000,
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92500, 11, 11 }, /* 108 Mb */
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[51] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 162000,
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130300, 12, 12 }, /* 162 Mb */
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[52] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 216000,
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162800, 13, 13 }, /* 216 Mb */
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[53] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 243000,
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178200, 14, 14 }, /* 243 Mb */
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[54] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 270000,
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192100, 15, 15 }, /* 270 Mb */
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[55] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS_HGI, 300000,
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207000, 15, 15 }, /* 300 Mb */
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[56] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 40500,
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36100, 16, 16 }, /* 40.5 Mb */
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[57] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 81000,
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72900, 17, 17 }, /* 81 Mb */
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[58] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 121500,
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108300, 18, 18 }, /* 121.5 Mb */
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[59] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 162000,
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142000, 19, 19 }, /* 162 Mb */
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[60] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 243000,
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205100, 20, 20 }, /* 243 Mb */
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[61] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS_HGI, 270000,
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224700, 20, 20 }, /* 270 Mb */
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[62] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 324000,
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263100, 21, 21 }, /* 324 Mb */
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[63] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 360000,
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288000, 21, 21 }, /* 360 Mb */
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[64] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 364500,
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290700, 22, 22 }, /* 364.5 Mb */
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[65] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 405000,
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317200, 22, 22 }, /* 405 Mb */
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[66] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 405000,
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317200, 23, 23 }, /* 405 Mb */
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[67] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 450000,
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346400, 23, 23 }, /* 450 Mb */
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},
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50, /* probe interval */
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WLAN_RC_HT_FLAG, /* Phy rates allowed initially */
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};
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/* 4ms frame limit not used for NG mode. The values filled
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* for HT are the 64K max aggregate limit */
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static const struct ath_rate_table ar5416_11ng_ratetable = {
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72,
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12, /* MCS start */
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{
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[0] = { RC_ALL, WLAN_RC_PHY_CCK, 1000,
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900, 0, 2 }, /* 1 Mb */
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[1] = { RC_ALL, WLAN_RC_PHY_CCK, 2000,
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1900, 1, 4 }, /* 2 Mb */
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[2] = { RC_ALL, WLAN_RC_PHY_CCK, 5500,
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4900, 2, 11 }, /* 5.5 Mb */
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[3] = { RC_ALL, WLAN_RC_PHY_CCK, 11000,
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8100, 3, 22 }, /* 11 Mb */
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[4] = { RC_INVALID, WLAN_RC_PHY_OFDM, 6000,
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5400, 4, 12 }, /* 6 Mb */
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[5] = { RC_INVALID, WLAN_RC_PHY_OFDM, 9000,
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7800, 5, 18 }, /* 9 Mb */
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[6] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 12000,
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10100, 6, 24 }, /* 12 Mb */
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[7] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 18000,
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14100, 7, 36 }, /* 18 Mb */
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[8] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 24000,
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17700, 8, 48 }, /* 24 Mb */
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[9] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 36000,
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23700, 9, 72 }, /* 36 Mb */
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[10] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 48000,
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27400, 10, 96 }, /* 48 Mb */
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[11] = { RC_L_SDT, WLAN_RC_PHY_OFDM, 54000,
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30900, 11, 108 }, /* 54 Mb */
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[12] = { RC_INVALID, WLAN_RC_PHY_HT_20_SS, 6500,
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6400, 0, 0 }, /* 6.5 Mb */
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[13] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 13000,
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12700, 1, 1 }, /* 13 Mb */
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[14] = { RC_HT_SDT_20, WLAN_RC_PHY_HT_20_SS, 19500,
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18800, 2, 2 }, /* 19.5 Mb*/
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[15] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 26000,
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25000, 3, 3 }, /* 26 Mb */
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[16] = { RC_HT_SD_20, WLAN_RC_PHY_HT_20_SS, 39000,
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36700, 4, 4 }, /* 39 Mb */
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[17] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 52000,
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48100, 5, 5 }, /* 52 Mb */
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[18] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 58500,
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53500, 6, 6 }, /* 58.5 Mb */
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[19] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS, 65000,
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59000, 7, 7 }, /* 65 Mb */
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[20] = { RC_HT_S_20, WLAN_RC_PHY_HT_20_SS_HGI, 72200,
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65400, 7, 7 }, /* 65 Mb*/
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[21] = { RC_INVALID, WLAN_RC_PHY_HT_20_DS, 13000,
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12700, 8, 8 }, /* 13 Mb */
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[22] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 26000,
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24800, 9, 9 }, /* 26 Mb */
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[23] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_DS, 39000,
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36600, 10, 10 }, /* 39 Mb */
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[24] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 52000,
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48100, 11, 11 }, /* 52 Mb */
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[25] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 78000,
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69500, 12, 12 }, /* 78 Mb */
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[26] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 104000,
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89500, 13, 13 }, /* 104 Mb */
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[27] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 117000,
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98900, 14, 14 }, /* 117 Mb */
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[28] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS, 130000,
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108300, 15, 15 }, /* 130 Mb */
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[29] = { RC_HT_DT_20, WLAN_RC_PHY_HT_20_DS_HGI, 144400,
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120000, 15, 15 }, /* 144.4 Mb */
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[30] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 19500,
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17400, 16, 16 }, /* 19.5 Mb */
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[31] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 39000,
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35100, 17, 17 }, /* 39 Mb */
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[32] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 58500,
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52600, 18, 18 }, /* 58.5 Mb */
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[33] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 78000,
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70400, 19, 19 }, /* 78 Mb */
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[34] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS, 117000,
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104900, 20, 20 }, /* 117 Mb */
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[35] = { RC_INVALID, WLAN_RC_PHY_HT_20_TS_HGI, 130000,
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115800, 20, 20 }, /* 130 Mb */
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[36] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 156000,
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137200, 21, 21 }, /* 156 Mb */
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[37] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 173300,
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151100, 21, 21 }, /* 173.3 Mb */
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[38] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 175500,
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152800, 22, 22 }, /* 175.5 Mb */
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[39] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 195000,
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168400, 22, 22 }, /* 195 Mb */
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[40] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS, 195000,
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168400, 23, 23 }, /* 195 Mb */
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[41] = { RC_HT_T_20, WLAN_RC_PHY_HT_20_TS_HGI, 216700,
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185000, 23, 23 }, /* 216.7 Mb */
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[42] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 13500,
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13200, 0, 0 }, /* 13.5 Mb */
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[43] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 27500,
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25900, 1, 1 }, /* 27.0 Mb */
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[44] = { RC_HT_SDT_40, WLAN_RC_PHY_HT_40_SS, 40500,
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38600, 2, 2 }, /* 40.5 Mb */
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[45] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 54000,
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49800, 3, 3 }, /* 54 Mb */
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[46] = { RC_HT_SD_40, WLAN_RC_PHY_HT_40_SS, 81500,
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72200, 4, 4 }, /* 81 Mb */
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[47] = { RC_HT_S_40 , WLAN_RC_PHY_HT_40_SS, 108000,
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92900, 5, 5 }, /* 108 Mb */
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[48] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 121500,
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102700, 6, 6 }, /* 121.5 Mb */
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[49] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS, 135000,
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112000, 7, 7 }, /* 135 Mb */
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[50] = { RC_HT_S_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000,
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122000, 7, 7 }, /* 150 Mb */
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[51] = { RC_INVALID, WLAN_RC_PHY_HT_40_DS, 27000,
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25800, 8, 8 }, /* 27 Mb */
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[52] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 54000,
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49800, 9, 9 }, /* 54 Mb */
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[53] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_DS, 81000,
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71900, 10, 10 }, /* 81 Mb */
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[54] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 108000,
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92500, 11, 11 }, /* 108 Mb */
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[55] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 162000,
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130300, 12, 12 }, /* 162 Mb */
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[56] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 216000,
|
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162800, 13, 13 }, /* 216 Mb */
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[57] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 243000,
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178200, 14, 14 }, /* 243 Mb */
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[58] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS, 270000,
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192100, 15, 15 }, /* 270 Mb */
|
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[59] = { RC_HT_DT_40, WLAN_RC_PHY_HT_40_DS_HGI, 300000,
|
|
207000, 15, 15 }, /* 300 Mb */
|
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[60] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 40500,
|
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36100, 16, 16 }, /* 40.5 Mb */
|
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[61] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 81000,
|
|
72900, 17, 17 }, /* 81 Mb */
|
|
[62] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 121500,
|
|
108300, 18, 18 }, /* 121.5 Mb */
|
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[63] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 162000,
|
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142000, 19, 19 }, /* 162 Mb */
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[64] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS, 243000,
|
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205100, 20, 20 }, /* 243 Mb */
|
|
[65] = { RC_INVALID, WLAN_RC_PHY_HT_40_TS_HGI, 270000,
|
|
224700, 20, 20 }, /* 270 Mb */
|
|
[66] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 324000,
|
|
263100, 21, 21 }, /* 324 Mb */
|
|
[67] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 360000,
|
|
288000, 21, 21 }, /* 360 Mb */
|
|
[68] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 364500,
|
|
290700, 22, 22 }, /* 364.5 Mb */
|
|
[69] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 405000,
|
|
317200, 22, 22 }, /* 405 Mb */
|
|
[70] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS, 405000,
|
|
317200, 23, 23 }, /* 405 Mb */
|
|
[71] = { RC_HT_T_40, WLAN_RC_PHY_HT_40_TS_HGI, 450000,
|
|
346400, 23, 23 }, /* 450 Mb */
|
|
},
|
|
50, /* probe interval */
|
|
WLAN_RC_HT_FLAG, /* Phy rates allowed initially */
|
|
};
|
|
|
|
static const struct ath_rate_table ar5416_11a_ratetable = {
|
|
8,
|
|
0,
|
|
{
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
|
|
5400, 0, 12},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
|
|
7800, 1, 18},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
|
|
10000, 2, 24},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
|
|
13900, 3, 36},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
|
|
17300, 4, 48},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
|
|
23000, 5, 72},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
|
|
27400, 6, 96},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
|
|
29300, 7, 108},
|
|
},
|
|
50, /* probe interval */
|
|
0, /* Phy rates allowed initially */
|
|
};
|
|
|
|
static const struct ath_rate_table ar5416_11g_ratetable = {
|
|
12,
|
|
0,
|
|
{
|
|
{ RC_L_SDT, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */
|
|
900, 0, 2},
|
|
{ RC_L_SDT, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */
|
|
1900, 1, 4},
|
|
{ RC_L_SDT, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */
|
|
4900, 2, 11},
|
|
{ RC_L_SDT, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */
|
|
8100, 3, 22},
|
|
{ RC_INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */
|
|
5400, 4, 12},
|
|
{ RC_INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */
|
|
7800, 5, 18},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */
|
|
10000, 6, 24},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */
|
|
13900, 7, 36},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */
|
|
17300, 8, 48},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */
|
|
23000, 9, 72},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */
|
|
27400, 10, 96},
|
|
{ RC_L_SDT, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */
|
|
29300, 11, 108},
|
|
},
|
|
50, /* probe interval */
|
|
0, /* Phy rates allowed initially */
|
|
};
|
|
|
|
static int ath_rc_get_rateindex(struct ath_rate_priv *ath_rc_priv,
|
|
struct ieee80211_tx_rate *rate)
|
|
{
|
|
const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
|
|
int rix, i, idx = 0;
|
|
|
|
if (!(rate->flags & IEEE80211_TX_RC_MCS))
|
|
return rate->idx;
|
|
|
|
for (i = 0; i < ath_rc_priv->max_valid_rate; i++) {
|
|
idx = ath_rc_priv->valid_rate_index[i];
|
|
|
|
if (WLAN_RC_PHY_HT(rate_table->info[idx].phy) &&
|
|
rate_table->info[idx].ratecode == rate->idx)
|
|
break;
|
|
}
|
|
|
|
rix = idx;
|
|
|
|
if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
|
|
rix++;
|
|
|
|
return rix;
|
|
}
|
|
|
|
static void ath_rc_sort_validrates(struct ath_rate_priv *ath_rc_priv)
|
|
{
|
|
const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
|
|
u8 i, j, idx, idx_next;
|
|
|
|
for (i = ath_rc_priv->max_valid_rate - 1; i > 0; i--) {
|
|
for (j = 0; j <= i-1; j++) {
|
|
idx = ath_rc_priv->valid_rate_index[j];
|
|
idx_next = ath_rc_priv->valid_rate_index[j+1];
|
|
|
|
if (rate_table->info[idx].ratekbps >
|
|
rate_table->info[idx_next].ratekbps) {
|
|
ath_rc_priv->valid_rate_index[j] = idx_next;
|
|
ath_rc_priv->valid_rate_index[j+1] = idx;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline
|
|
int ath_rc_get_nextvalid_txrate(const struct ath_rate_table *rate_table,
|
|
struct ath_rate_priv *ath_rc_priv,
|
|
u8 cur_valid_txrate,
|
|
u8 *next_idx)
|
|
{
|
|
u8 i;
|
|
|
|
for (i = 0; i < ath_rc_priv->max_valid_rate - 1; i++) {
|
|
if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) {
|
|
*next_idx = ath_rc_priv->valid_rate_index[i+1];
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* No more valid rates */
|
|
*next_idx = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Return true only for single stream */
|
|
|
|
static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw)
|
|
{
|
|
if (WLAN_RC_PHY_HT(phy) && !(capflag & WLAN_RC_HT_FLAG))
|
|
return 0;
|
|
if (WLAN_RC_PHY_DS(phy) && !(capflag & WLAN_RC_DS_FLAG))
|
|
return 0;
|
|
if (WLAN_RC_PHY_TS(phy) && !(capflag & WLAN_RC_TS_FLAG))
|
|
return 0;
|
|
if (WLAN_RC_PHY_SGI(phy) && !(capflag & WLAN_RC_SGI_FLAG))
|
|
return 0;
|
|
if (!ignore_cw && WLAN_RC_PHY_HT(phy))
|
|
if (WLAN_RC_PHY_40(phy) && !(capflag & WLAN_RC_40_FLAG))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static inline int
|
|
ath_rc_get_lower_rix(struct ath_rate_priv *ath_rc_priv,
|
|
u8 cur_valid_txrate, u8 *next_idx)
|
|
{
|
|
int8_t i;
|
|
|
|
for (i = 1; i < ath_rc_priv->max_valid_rate ; i++) {
|
|
if (ath_rc_priv->valid_rate_index[i] == cur_valid_txrate) {
|
|
*next_idx = ath_rc_priv->valid_rate_index[i-1];
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u8 ath_rc_init_validrates(struct ath_rate_priv *ath_rc_priv)
|
|
{
|
|
const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
|
|
u8 i, hi = 0;
|
|
|
|
for (i = 0; i < rate_table->rate_cnt; i++) {
|
|
if (rate_table->info[i].rate_flags & RC_LEGACY) {
|
|
u32 phy = rate_table->info[i].phy;
|
|
u8 valid_rate_count = 0;
|
|
|
|
if (!ath_rc_valid_phyrate(phy, ath_rc_priv->ht_cap, 0))
|
|
continue;
|
|
|
|
valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy];
|
|
|
|
ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = i;
|
|
ath_rc_priv->valid_phy_ratecnt[phy] += 1;
|
|
ath_rc_priv->valid_rate_index[i] = true;
|
|
hi = i;
|
|
}
|
|
}
|
|
|
|
return hi;
|
|
}
|
|
|
|
static inline bool ath_rc_check_legacy(u8 rate, u8 dot11rate, u16 rate_flags,
|
|
u32 phy, u32 capflag)
|
|
{
|
|
if (rate != dot11rate || WLAN_RC_PHY_HT(phy))
|
|
return false;
|
|
|
|
if ((rate_flags & WLAN_RC_CAP_MODE(capflag)) != WLAN_RC_CAP_MODE(capflag))
|
|
return false;
|
|
|
|
if (!(rate_flags & WLAN_RC_CAP_STREAM(capflag)))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static inline bool ath_rc_check_ht(u8 rate, u8 dot11rate, u16 rate_flags,
|
|
u32 phy, u32 capflag)
|
|
{
|
|
if (rate != dot11rate || !WLAN_RC_PHY_HT(phy))
|
|
return false;
|
|
|
|
if (!WLAN_RC_PHY_HT_VALID(rate_flags, capflag))
|
|
return false;
|
|
|
|
if (!(rate_flags & WLAN_RC_CAP_STREAM(capflag)))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv, bool legacy)
|
|
{
|
|
const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
|
|
struct ath_rateset *rateset;
|
|
u32 phy, capflag = ath_rc_priv->ht_cap;
|
|
u16 rate_flags;
|
|
u8 i, j, hi = 0, rate, dot11rate, valid_rate_count;
|
|
|
|
if (legacy)
|
|
rateset = &ath_rc_priv->neg_rates;
|
|
else
|
|
rateset = &ath_rc_priv->neg_ht_rates;
|
|
|
|
for (i = 0; i < rateset->rs_nrates; i++) {
|
|
for (j = 0; j < rate_table->rate_cnt; j++) {
|
|
phy = rate_table->info[j].phy;
|
|
rate_flags = rate_table->info[j].rate_flags;
|
|
rate = rateset->rs_rates[i];
|
|
dot11rate = rate_table->info[j].dot11rate;
|
|
|
|
if (legacy &&
|
|
!ath_rc_check_legacy(rate, dot11rate,
|
|
rate_flags, phy, capflag))
|
|
continue;
|
|
|
|
if (!legacy &&
|
|
!ath_rc_check_ht(rate, dot11rate,
|
|
rate_flags, phy, capflag))
|
|
continue;
|
|
|
|
if (!ath_rc_valid_phyrate(phy, capflag, 0))
|
|
continue;
|
|
|
|
valid_rate_count = ath_rc_priv->valid_phy_ratecnt[phy];
|
|
ath_rc_priv->valid_phy_rateidx[phy][valid_rate_count] = j;
|
|
ath_rc_priv->valid_phy_ratecnt[phy] += 1;
|
|
ath_rc_priv->valid_rate_index[j] = true;
|
|
hi = max(hi, j);
|
|
}
|
|
}
|
|
|
|
return hi;
|
|
}
|
|
|
|
static u8 ath_rc_get_highest_rix(struct ath_rate_priv *ath_rc_priv,
|
|
int *is_probing)
|
|
{
|
|
const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
|
|
u32 best_thruput, this_thruput, now_msec;
|
|
u8 rate, next_rate, best_rate, maxindex, minindex;
|
|
int8_t index = 0;
|
|
|
|
now_msec = jiffies_to_msecs(jiffies);
|
|
*is_probing = 0;
|
|
best_thruput = 0;
|
|
maxindex = ath_rc_priv->max_valid_rate-1;
|
|
minindex = 0;
|
|
best_rate = minindex;
|
|
|
|
/*
|
|
* Try the higher rate first. It will reduce memory moving time
|
|
* if we have very good channel characteristics.
|
|
*/
|
|
for (index = maxindex; index >= minindex ; index--) {
|
|
u8 per_thres;
|
|
|
|
rate = ath_rc_priv->valid_rate_index[index];
|
|
if (rate > ath_rc_priv->rate_max_phy)
|
|
continue;
|
|
|
|
/*
|
|
* For TCP the average collision rate is around 11%,
|
|
* so we ignore PERs less than this. This is to
|
|
* prevent the rate we are currently using (whose
|
|
* PER might be in the 10-15 range because of TCP
|
|
* collisions) looking worse than the next lower
|
|
* rate whose PER has decayed close to 0. If we
|
|
* used to next lower rate, its PER would grow to
|
|
* 10-15 and we would be worse off then staying
|
|
* at the current rate.
|
|
*/
|
|
per_thres = ath_rc_priv->per[rate];
|
|
if (per_thres < 12)
|
|
per_thres = 12;
|
|
|
|
this_thruput = rate_table->info[rate].user_ratekbps *
|
|
(100 - per_thres);
|
|
|
|
if (best_thruput <= this_thruput) {
|
|
best_thruput = this_thruput;
|
|
best_rate = rate;
|
|
}
|
|
}
|
|
|
|
rate = best_rate;
|
|
|
|
/*
|
|
* Must check the actual rate (ratekbps) to account for
|
|
* non-monoticity of 11g's rate table
|
|
*/
|
|
|
|
if (rate >= ath_rc_priv->rate_max_phy) {
|
|
rate = ath_rc_priv->rate_max_phy;
|
|
|
|
/* Probe the next allowed phy state */
|
|
if (ath_rc_get_nextvalid_txrate(rate_table,
|
|
ath_rc_priv, rate, &next_rate) &&
|
|
(now_msec - ath_rc_priv->probe_time >
|
|
rate_table->probe_interval) &&
|
|
(ath_rc_priv->hw_maxretry_pktcnt >= 1)) {
|
|
rate = next_rate;
|
|
ath_rc_priv->probe_rate = rate;
|
|
ath_rc_priv->probe_time = now_msec;
|
|
ath_rc_priv->hw_maxretry_pktcnt = 0;
|
|
*is_probing = 1;
|
|
}
|
|
}
|
|
|
|
if (rate > (ath_rc_priv->rate_table_size - 1))
|
|
rate = ath_rc_priv->rate_table_size - 1;
|
|
|
|
if (RC_TS_ONLY(rate_table->info[rate].rate_flags) &&
|
|
(ath_rc_priv->ht_cap & WLAN_RC_TS_FLAG))
|
|
return rate;
|
|
|
|
if (RC_DS_OR_LATER(rate_table->info[rate].rate_flags) &&
|
|
(ath_rc_priv->ht_cap & (WLAN_RC_DS_FLAG | WLAN_RC_TS_FLAG)))
|
|
return rate;
|
|
|
|
if (RC_SS_OR_LEGACY(rate_table->info[rate].rate_flags))
|
|
return rate;
|
|
|
|
/* This should not happen */
|
|
WARN_ON_ONCE(1);
|
|
|
|
rate = ath_rc_priv->valid_rate_index[0];
|
|
|
|
return rate;
|
|
}
|
|
|
|
static void ath_rc_rate_set_series(const struct ath_rate_table *rate_table,
|
|
struct ieee80211_tx_rate *rate,
|
|
struct ieee80211_tx_rate_control *txrc,
|
|
u8 tries, u8 rix, int rtsctsenable)
|
|
{
|
|
rate->count = tries;
|
|
rate->idx = rate_table->info[rix].ratecode;
|
|
|
|
if (txrc->rts || rtsctsenable)
|
|
rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS;
|
|
|
|
if (WLAN_RC_PHY_HT(rate_table->info[rix].phy)) {
|
|
rate->flags |= IEEE80211_TX_RC_MCS;
|
|
if (WLAN_RC_PHY_40(rate_table->info[rix].phy) &&
|
|
conf_is_ht40(&txrc->hw->conf))
|
|
rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
|
|
if (WLAN_RC_PHY_SGI(rate_table->info[rix].phy))
|
|
rate->flags |= IEEE80211_TX_RC_SHORT_GI;
|
|
}
|
|
}
|
|
|
|
static void ath_rc_rate_set_rtscts(struct ath_softc *sc,
|
|
const struct ath_rate_table *rate_table,
|
|
struct ieee80211_tx_info *tx_info)
|
|
{
|
|
struct ieee80211_bss_conf *bss_conf;
|
|
|
|
if (!tx_info->control.vif)
|
|
return;
|
|
/*
|
|
* For legacy frames, mac80211 takes care of CTS protection.
|
|
*/
|
|
if (!(tx_info->control.rates[0].flags & IEEE80211_TX_RC_MCS))
|
|
return;
|
|
|
|
bss_conf = &tx_info->control.vif->bss_conf;
|
|
|
|
if (!bss_conf->basic_rates)
|
|
return;
|
|
|
|
/*
|
|
* For now, use the lowest allowed basic rate for HT frames.
|
|
*/
|
|
tx_info->control.rts_cts_rate_idx = __ffs(bss_conf->basic_rates);
|
|
}
|
|
|
|
static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
|
|
struct ieee80211_tx_rate_control *txrc)
|
|
{
|
|
struct ath_softc *sc = priv;
|
|
struct ath_rate_priv *ath_rc_priv = priv_sta;
|
|
const struct ath_rate_table *rate_table;
|
|
struct sk_buff *skb = txrc->skb;
|
|
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
|
|
struct ieee80211_tx_rate *rates = tx_info->control.rates;
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
|
|
__le16 fc = hdr->frame_control;
|
|
u8 try_per_rate, i = 0, rix;
|
|
int is_probe = 0;
|
|
|
|
if (rate_control_send_low(sta, priv_sta, txrc))
|
|
return;
|
|
|
|
/*
|
|
* For Multi Rate Retry we use a different number of
|
|
* retry attempt counts. This ends up looking like this:
|
|
*
|
|
* MRR[0] = 4
|
|
* MRR[1] = 4
|
|
* MRR[2] = 4
|
|
* MRR[3] = 8
|
|
*
|
|
*/
|
|
try_per_rate = 4;
|
|
|
|
rate_table = ath_rc_priv->rate_table;
|
|
rix = ath_rc_get_highest_rix(ath_rc_priv, &is_probe);
|
|
|
|
if (conf_is_ht(&sc->hw->conf) &&
|
|
(sta->ht_cap.cap & IEEE80211_HT_CAP_LDPC_CODING))
|
|
tx_info->flags |= IEEE80211_TX_CTL_LDPC;
|
|
|
|
if (conf_is_ht(&sc->hw->conf) &&
|
|
(sta->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC))
|
|
tx_info->flags |= (1 << IEEE80211_TX_CTL_STBC_SHIFT);
|
|
|
|
if (is_probe) {
|
|
/*
|
|
* Set one try for probe rates. For the
|
|
* probes don't enable RTS.
|
|
*/
|
|
ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
|
|
1, rix, 0);
|
|
/*
|
|
* Get the next tried/allowed rate.
|
|
* No RTS for the next series after the probe rate.
|
|
*/
|
|
ath_rc_get_lower_rix(ath_rc_priv, rix, &rix);
|
|
ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
|
|
try_per_rate, rix, 0);
|
|
|
|
tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
|
|
} else {
|
|
/*
|
|
* Set the chosen rate. No RTS for first series entry.
|
|
*/
|
|
ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
|
|
try_per_rate, rix, 0);
|
|
}
|
|
|
|
for ( ; i < 4; i++) {
|
|
/*
|
|
* Use twice the number of tries for the last MRR segment.
|
|
*/
|
|
if (i + 1 == 4)
|
|
try_per_rate = 8;
|
|
|
|
ath_rc_get_lower_rix(ath_rc_priv, rix, &rix);
|
|
|
|
/*
|
|
* All other rates in the series have RTS enabled.
|
|
*/
|
|
ath_rc_rate_set_series(rate_table, &rates[i], txrc,
|
|
try_per_rate, rix, 1);
|
|
}
|
|
|
|
/*
|
|
* NB:Change rate series to enable aggregation when operating
|
|
* at lower MCS rates. When first rate in series is MCS2
|
|
* in HT40 @ 2.4GHz, series should look like:
|
|
*
|
|
* {MCS2, MCS1, MCS0, MCS0}.
|
|
*
|
|
* When first rate in series is MCS3 in HT20 @ 2.4GHz, series should
|
|
* look like:
|
|
*
|
|
* {MCS3, MCS2, MCS1, MCS1}
|
|
*
|
|
* So, set fourth rate in series to be same as third one for
|
|
* above conditions.
|
|
*/
|
|
if ((sc->hw->conf.chandef.chan->band == IEEE80211_BAND_2GHZ) &&
|
|
(conf_is_ht(&sc->hw->conf))) {
|
|
u8 dot11rate = rate_table->info[rix].dot11rate;
|
|
u8 phy = rate_table->info[rix].phy;
|
|
if (i == 4 &&
|
|
((dot11rate == 2 && phy == WLAN_RC_PHY_HT_40_SS) ||
|
|
(dot11rate == 3 && phy == WLAN_RC_PHY_HT_20_SS))) {
|
|
rates[3].idx = rates[2].idx;
|
|
rates[3].flags = rates[2].flags;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Force hardware to use computed duration for next
|
|
* fragment by disabling multi-rate retry, which
|
|
* updates duration based on the multi-rate duration table.
|
|
*
|
|
* FIXME: Fix duration
|
|
*/
|
|
if (ieee80211_has_morefrags(fc) ||
|
|
(le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG)) {
|
|
rates[1].count = rates[2].count = rates[3].count = 0;
|
|
rates[1].idx = rates[2].idx = rates[3].idx = 0;
|
|
rates[0].count = ATH_TXMAXTRY;
|
|
}
|
|
|
|
ath_rc_rate_set_rtscts(sc, rate_table, tx_info);
|
|
}
|
|
|
|
static void ath_rc_update_per(struct ath_softc *sc,
|
|
const struct ath_rate_table *rate_table,
|
|
struct ath_rate_priv *ath_rc_priv,
|
|
struct ieee80211_tx_info *tx_info,
|
|
int tx_rate, int xretries, int retries,
|
|
u32 now_msec)
|
|
{
|
|
int count, n_bad_frames;
|
|
u8 last_per;
|
|
static const u32 nretry_to_per_lookup[10] = {
|
|
100 * 0 / 1,
|
|
100 * 1 / 4,
|
|
100 * 1 / 2,
|
|
100 * 3 / 4,
|
|
100 * 4 / 5,
|
|
100 * 5 / 6,
|
|
100 * 6 / 7,
|
|
100 * 7 / 8,
|
|
100 * 8 / 9,
|
|
100 * 9 / 10
|
|
};
|
|
|
|
last_per = ath_rc_priv->per[tx_rate];
|
|
n_bad_frames = tx_info->status.ampdu_len - tx_info->status.ampdu_ack_len;
|
|
|
|
if (xretries) {
|
|
if (xretries == 1) {
|
|
ath_rc_priv->per[tx_rate] += 30;
|
|
if (ath_rc_priv->per[tx_rate] > 100)
|
|
ath_rc_priv->per[tx_rate] = 100;
|
|
} else {
|
|
/* xretries == 2 */
|
|
count = ARRAY_SIZE(nretry_to_per_lookup);
|
|
if (retries >= count)
|
|
retries = count - 1;
|
|
|
|
/* new_PER = 7/8*old_PER + 1/8*(currentPER) */
|
|
ath_rc_priv->per[tx_rate] =
|
|
(u8)(last_per - (last_per >> 3) + (100 >> 3));
|
|
}
|
|
|
|
/* xretries == 1 or 2 */
|
|
|
|
if (ath_rc_priv->probe_rate == tx_rate)
|
|
ath_rc_priv->probe_rate = 0;
|
|
|
|
} else { /* xretries == 0 */
|
|
count = ARRAY_SIZE(nretry_to_per_lookup);
|
|
if (retries >= count)
|
|
retries = count - 1;
|
|
|
|
if (n_bad_frames) {
|
|
/* new_PER = 7/8*old_PER + 1/8*(currentPER)
|
|
* Assuming that n_frames is not 0. The current PER
|
|
* from the retries is 100 * retries / (retries+1),
|
|
* since the first retries attempts failed, and the
|
|
* next one worked. For the one that worked,
|
|
* n_bad_frames subframes out of n_frames wored,
|
|
* so the PER for that part is
|
|
* 100 * n_bad_frames / n_frames, and it contributes
|
|
* 100 * n_bad_frames / (n_frames * (retries+1)) to
|
|
* the above PER. The expression below is a
|
|
* simplified version of the sum of these two terms.
|
|
*/
|
|
if (tx_info->status.ampdu_len > 0) {
|
|
int n_frames, n_bad_tries;
|
|
u8 cur_per, new_per;
|
|
|
|
n_bad_tries = retries * tx_info->status.ampdu_len +
|
|
n_bad_frames;
|
|
n_frames = tx_info->status.ampdu_len * (retries + 1);
|
|
cur_per = (100 * n_bad_tries / n_frames) >> 3;
|
|
new_per = (u8)(last_per - (last_per >> 3) + cur_per);
|
|
ath_rc_priv->per[tx_rate] = new_per;
|
|
}
|
|
} else {
|
|
ath_rc_priv->per[tx_rate] =
|
|
(u8)(last_per - (last_per >> 3) +
|
|
(nretry_to_per_lookup[retries] >> 3));
|
|
}
|
|
|
|
|
|
/*
|
|
* If we got at most one retry then increase the max rate if
|
|
* this was a probe. Otherwise, ignore the probe.
|
|
*/
|
|
if (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) {
|
|
if (retries > 0 || 2 * n_bad_frames > tx_info->status.ampdu_len) {
|
|
/*
|
|
* Since we probed with just a single attempt,
|
|
* any retries means the probe failed. Also,
|
|
* if the attempt worked, but more than half
|
|
* the subframes were bad then also consider
|
|
* the probe a failure.
|
|
*/
|
|
ath_rc_priv->probe_rate = 0;
|
|
} else {
|
|
u8 probe_rate = 0;
|
|
|
|
ath_rc_priv->rate_max_phy =
|
|
ath_rc_priv->probe_rate;
|
|
probe_rate = ath_rc_priv->probe_rate;
|
|
|
|
if (ath_rc_priv->per[probe_rate] > 30)
|
|
ath_rc_priv->per[probe_rate] = 20;
|
|
|
|
ath_rc_priv->probe_rate = 0;
|
|
|
|
/*
|
|
* Since this probe succeeded, we allow the next
|
|
* probe twice as soon. This allows the maxRate
|
|
* to move up faster if the probes are
|
|
* successful.
|
|
*/
|
|
ath_rc_priv->probe_time =
|
|
now_msec - rate_table->probe_interval / 2;
|
|
}
|
|
}
|
|
|
|
if (retries > 0) {
|
|
/*
|
|
* Don't update anything. We don't know if
|
|
* this was because of collisions or poor signal.
|
|
*/
|
|
ath_rc_priv->hw_maxretry_pktcnt = 0;
|
|
} else {
|
|
/*
|
|
* It worked with no retries. First ignore bogus (small)
|
|
* rssi_ack values.
|
|
*/
|
|
if (tx_rate == ath_rc_priv->rate_max_phy &&
|
|
ath_rc_priv->hw_maxretry_pktcnt < 255) {
|
|
ath_rc_priv->hw_maxretry_pktcnt++;
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ath_rc_update_ht(struct ath_softc *sc,
|
|
struct ath_rate_priv *ath_rc_priv,
|
|
struct ieee80211_tx_info *tx_info,
|
|
int tx_rate, int xretries, int retries)
|
|
{
|
|
u32 now_msec = jiffies_to_msecs(jiffies);
|
|
int rate;
|
|
u8 last_per;
|
|
const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
|
|
int size = ath_rc_priv->rate_table_size;
|
|
|
|
if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt))
|
|
return;
|
|
|
|
last_per = ath_rc_priv->per[tx_rate];
|
|
|
|
/* Update PER first */
|
|
ath_rc_update_per(sc, rate_table, ath_rc_priv,
|
|
tx_info, tx_rate, xretries,
|
|
retries, now_msec);
|
|
|
|
/*
|
|
* If this rate looks bad (high PER) then stop using it for
|
|
* a while (except if we are probing).
|
|
*/
|
|
if (ath_rc_priv->per[tx_rate] >= 55 && tx_rate > 0 &&
|
|
rate_table->info[tx_rate].ratekbps <=
|
|
rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) {
|
|
ath_rc_get_lower_rix(ath_rc_priv, (u8)tx_rate,
|
|
&ath_rc_priv->rate_max_phy);
|
|
|
|
/* Don't probe for a little while. */
|
|
ath_rc_priv->probe_time = now_msec;
|
|
}
|
|
|
|
/* Make sure the rates below this have lower PER */
|
|
/* Monotonicity is kept only for rates below the current rate. */
|
|
if (ath_rc_priv->per[tx_rate] < last_per) {
|
|
for (rate = tx_rate - 1; rate >= 0; rate--) {
|
|
|
|
if (ath_rc_priv->per[rate] >
|
|
ath_rc_priv->per[rate+1]) {
|
|
ath_rc_priv->per[rate] =
|
|
ath_rc_priv->per[rate+1];
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Maintain monotonicity for rates above the current rate */
|
|
for (rate = tx_rate; rate < size - 1; rate++) {
|
|
if (ath_rc_priv->per[rate+1] <
|
|
ath_rc_priv->per[rate])
|
|
ath_rc_priv->per[rate+1] =
|
|
ath_rc_priv->per[rate];
|
|
}
|
|
|
|
/* Every so often, we reduce the thresholds
|
|
* and PER (different for CCK and OFDM). */
|
|
if (now_msec - ath_rc_priv->per_down_time >=
|
|
rate_table->probe_interval) {
|
|
for (rate = 0; rate < size; rate++) {
|
|
ath_rc_priv->per[rate] =
|
|
7 * ath_rc_priv->per[rate] / 8;
|
|
}
|
|
|
|
ath_rc_priv->per_down_time = now_msec;
|
|
}
|
|
|
|
ath_debug_stat_retries(ath_rc_priv, tx_rate, xretries, retries,
|
|
ath_rc_priv->per[tx_rate]);
|
|
|
|
}
|
|
|
|
static void ath_rc_tx_status(struct ath_softc *sc,
|
|
struct ath_rate_priv *ath_rc_priv,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
|
|
struct ieee80211_tx_rate *rates = tx_info->status.rates;
|
|
struct ieee80211_tx_rate *rate;
|
|
int final_ts_idx = 0, xretries = 0, long_retry = 0;
|
|
u8 flags;
|
|
u32 i = 0, rix;
|
|
|
|
for (i = 0; i < sc->hw->max_rates; i++) {
|
|
rate = &tx_info->status.rates[i];
|
|
if (rate->idx < 0 || !rate->count)
|
|
break;
|
|
|
|
final_ts_idx = i;
|
|
long_retry = rate->count - 1;
|
|
}
|
|
|
|
if (!(tx_info->flags & IEEE80211_TX_STAT_ACK))
|
|
xretries = 1;
|
|
|
|
/*
|
|
* If the first rate is not the final index, there
|
|
* are intermediate rate failures to be processed.
|
|
*/
|
|
if (final_ts_idx != 0) {
|
|
for (i = 0; i < final_ts_idx ; i++) {
|
|
if (rates[i].count != 0 && (rates[i].idx >= 0)) {
|
|
flags = rates[i].flags;
|
|
|
|
/* If HT40 and we have switched mode from
|
|
* 40 to 20 => don't update */
|
|
|
|
if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
|
|
!(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG))
|
|
return;
|
|
|
|
rix = ath_rc_get_rateindex(ath_rc_priv, &rates[i]);
|
|
ath_rc_update_ht(sc, ath_rc_priv, tx_info,
|
|
rix, xretries ? 1 : 2,
|
|
rates[i].count);
|
|
}
|
|
}
|
|
}
|
|
|
|
flags = rates[final_ts_idx].flags;
|
|
|
|
/* If HT40 and we have switched mode from 40 to 20 => don't update */
|
|
if ((flags & IEEE80211_TX_RC_40_MHZ_WIDTH) &&
|
|
!(ath_rc_priv->ht_cap & WLAN_RC_40_FLAG))
|
|
return;
|
|
|
|
rix = ath_rc_get_rateindex(ath_rc_priv, &rates[final_ts_idx]);
|
|
ath_rc_update_ht(sc, ath_rc_priv, tx_info, rix, xretries, long_retry);
|
|
ath_debug_stat_rc(ath_rc_priv, rix);
|
|
}
|
|
|
|
static const
|
|
struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc,
|
|
enum ieee80211_band band,
|
|
bool is_ht)
|
|
{
|
|
switch(band) {
|
|
case IEEE80211_BAND_2GHZ:
|
|
if (is_ht)
|
|
return &ar5416_11ng_ratetable;
|
|
return &ar5416_11g_ratetable;
|
|
case IEEE80211_BAND_5GHZ:
|
|
if (is_ht)
|
|
return &ar5416_11na_ratetable;
|
|
return &ar5416_11a_ratetable;
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static void ath_rc_init(struct ath_softc *sc,
|
|
struct ath_rate_priv *ath_rc_priv)
|
|
{
|
|
const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
|
|
struct ath_rateset *rateset = &ath_rc_priv->neg_rates;
|
|
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
|
|
u8 i, j, k, hi = 0, hthi = 0;
|
|
|
|
ath_rc_priv->rate_table_size = RATE_TABLE_SIZE;
|
|
|
|
for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) {
|
|
ath_rc_priv->per[i] = 0;
|
|
ath_rc_priv->valid_rate_index[i] = 0;
|
|
}
|
|
|
|
for (i = 0; i < WLAN_RC_PHY_MAX; i++) {
|
|
for (j = 0; j < RATE_TABLE_SIZE; j++)
|
|
ath_rc_priv->valid_phy_rateidx[i][j] = 0;
|
|
ath_rc_priv->valid_phy_ratecnt[i] = 0;
|
|
}
|
|
|
|
if (!rateset->rs_nrates) {
|
|
hi = ath_rc_init_validrates(ath_rc_priv);
|
|
} else {
|
|
hi = ath_rc_setvalid_rates(ath_rc_priv, true);
|
|
|
|
if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG)
|
|
hthi = ath_rc_setvalid_rates(ath_rc_priv, false);
|
|
|
|
hi = max(hi, hthi);
|
|
}
|
|
|
|
ath_rc_priv->rate_table_size = hi + 1;
|
|
ath_rc_priv->rate_max_phy = 0;
|
|
WARN_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE);
|
|
|
|
for (i = 0, k = 0; i < WLAN_RC_PHY_MAX; i++) {
|
|
for (j = 0; j < ath_rc_priv->valid_phy_ratecnt[i]; j++) {
|
|
ath_rc_priv->valid_rate_index[k++] =
|
|
ath_rc_priv->valid_phy_rateidx[i][j];
|
|
}
|
|
|
|
if (!ath_rc_valid_phyrate(i, rate_table->initial_ratemax, 1) ||
|
|
!ath_rc_priv->valid_phy_ratecnt[i])
|
|
continue;
|
|
|
|
ath_rc_priv->rate_max_phy = ath_rc_priv->valid_phy_rateidx[i][j-1];
|
|
}
|
|
WARN_ON(ath_rc_priv->rate_table_size > RATE_TABLE_SIZE);
|
|
WARN_ON(k > RATE_TABLE_SIZE);
|
|
|
|
ath_rc_priv->max_valid_rate = k;
|
|
ath_rc_sort_validrates(ath_rc_priv);
|
|
ath_rc_priv->rate_max_phy = (k > 4) ?
|
|
ath_rc_priv->valid_rate_index[k-4] :
|
|
ath_rc_priv->valid_rate_index[k-1];
|
|
|
|
ath_dbg(common, CONFIG, "RC Initialized with capabilities: 0x%x\n",
|
|
ath_rc_priv->ht_cap);
|
|
}
|
|
|
|
static u8 ath_rc_build_ht_caps(struct ath_softc *sc, struct ieee80211_sta *sta)
|
|
{
|
|
u8 caps = 0;
|
|
|
|
if (sta->ht_cap.ht_supported) {
|
|
caps = WLAN_RC_HT_FLAG;
|
|
if (sta->ht_cap.mcs.rx_mask[1] && sta->ht_cap.mcs.rx_mask[2])
|
|
caps |= WLAN_RC_TS_FLAG | WLAN_RC_DS_FLAG;
|
|
else if (sta->ht_cap.mcs.rx_mask[1])
|
|
caps |= WLAN_RC_DS_FLAG;
|
|
if (sta->bandwidth >= IEEE80211_STA_RX_BW_40) {
|
|
caps |= WLAN_RC_40_FLAG;
|
|
if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)
|
|
caps |= WLAN_RC_SGI_FLAG;
|
|
} else {
|
|
if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20)
|
|
caps |= WLAN_RC_SGI_FLAG;
|
|
}
|
|
}
|
|
|
|
return caps;
|
|
}
|
|
|
|
static bool ath_tx_aggr_check(struct ath_softc *sc, struct ieee80211_sta *sta,
|
|
u8 tidno)
|
|
{
|
|
struct ath_node *an = (struct ath_node *)sta->drv_priv;
|
|
struct ath_atx_tid *txtid;
|
|
|
|
if (!sta->ht_cap.ht_supported)
|
|
return false;
|
|
|
|
txtid = ATH_AN_2_TID(an, tidno);
|
|
return !txtid->active;
|
|
}
|
|
|
|
|
|
/***********************************/
|
|
/* mac80211 Rate Control callbacks */
|
|
/***********************************/
|
|
|
|
static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta, void *priv_sta,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct ath_softc *sc = priv;
|
|
struct ath_rate_priv *ath_rc_priv = priv_sta;
|
|
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
|
|
__le16 fc = hdr->frame_control;
|
|
|
|
if (!priv_sta || !ieee80211_is_data(fc))
|
|
return;
|
|
|
|
/* This packet was aggregated but doesn't carry status info */
|
|
if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) &&
|
|
!(tx_info->flags & IEEE80211_TX_STAT_AMPDU))
|
|
return;
|
|
|
|
if (tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED)
|
|
return;
|
|
|
|
ath_rc_tx_status(sc, ath_rc_priv, skb);
|
|
|
|
/* Check if aggregation has to be enabled for this tid */
|
|
if (conf_is_ht(&sc->hw->conf) &&
|
|
!(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
|
|
if (ieee80211_is_data_qos(fc) &&
|
|
skb_get_queue_mapping(skb) != IEEE80211_AC_VO) {
|
|
u8 *qc, tid;
|
|
|
|
qc = ieee80211_get_qos_ctl(hdr);
|
|
tid = qc[0] & 0xf;
|
|
|
|
if(ath_tx_aggr_check(sc, sta, tid))
|
|
ieee80211_start_tx_ba_session(sta, tid, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta, void *priv_sta)
|
|
{
|
|
struct ath_softc *sc = priv;
|
|
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
|
|
struct ath_rate_priv *ath_rc_priv = priv_sta;
|
|
int i, j = 0;
|
|
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
if (sta->supp_rates[sband->band] & BIT(i)) {
|
|
ath_rc_priv->neg_rates.rs_rates[j]
|
|
= (sband->bitrates[i].bitrate * 2) / 10;
|
|
j++;
|
|
}
|
|
}
|
|
ath_rc_priv->neg_rates.rs_nrates = j;
|
|
|
|
if (sta->ht_cap.ht_supported) {
|
|
for (i = 0, j = 0; i < 77; i++) {
|
|
if (sta->ht_cap.mcs.rx_mask[i/8] & (1<<(i%8)))
|
|
ath_rc_priv->neg_ht_rates.rs_rates[j++] = i;
|
|
if (j == ATH_RATE_MAX)
|
|
break;
|
|
}
|
|
ath_rc_priv->neg_ht_rates.rs_nrates = j;
|
|
}
|
|
|
|
ath_rc_priv->rate_table = ath_choose_rate_table(sc, sband->band,
|
|
sta->ht_cap.ht_supported);
|
|
if (!ath_rc_priv->rate_table) {
|
|
ath_err(common, "No rate table chosen\n");
|
|
return;
|
|
}
|
|
|
|
ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta);
|
|
ath_rc_init(sc, priv_sta);
|
|
}
|
|
|
|
static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta, void *priv_sta,
|
|
u32 changed)
|
|
{
|
|
struct ath_softc *sc = priv;
|
|
struct ath_rate_priv *ath_rc_priv = priv_sta;
|
|
|
|
if (changed & IEEE80211_RC_BW_CHANGED) {
|
|
ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta);
|
|
ath_rc_init(sc, priv_sta);
|
|
|
|
ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG,
|
|
"Operating HT Bandwidth changed to: %d\n",
|
|
cfg80211_get_chandef_type(&sc->hw->conf.chandef));
|
|
}
|
|
}
|
|
|
|
#if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_DEBUGFS)
|
|
|
|
void ath_debug_stat_rc(struct ath_rate_priv *rc, int final_rate)
|
|
{
|
|
struct ath_rc_stats *stats;
|
|
|
|
stats = &rc->rcstats[final_rate];
|
|
stats->success++;
|
|
}
|
|
|
|
void ath_debug_stat_retries(struct ath_rate_priv *rc, int rix,
|
|
int xretries, int retries, u8 per)
|
|
{
|
|
struct ath_rc_stats *stats = &rc->rcstats[rix];
|
|
|
|
stats->xretries += xretries;
|
|
stats->retries += retries;
|
|
stats->per = per;
|
|
}
|
|
|
|
static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct ath_rate_priv *rc = file->private_data;
|
|
char *buf;
|
|
unsigned int len = 0, max;
|
|
int rix;
|
|
ssize_t retval;
|
|
|
|
if (rc->rate_table == NULL)
|
|
return 0;
|
|
|
|
max = 80 + rc->rate_table_size * 1024 + 1;
|
|
buf = kmalloc(max, GFP_KERNEL);
|
|
if (buf == NULL)
|
|
return -ENOMEM;
|
|
|
|
len += sprintf(buf, "%6s %6s %6s "
|
|
"%10s %10s %10s %10s\n",
|
|
"HT", "MCS", "Rate",
|
|
"Success", "Retries", "XRetries", "PER");
|
|
|
|
for (rix = 0; rix < rc->max_valid_rate; rix++) {
|
|
u8 i = rc->valid_rate_index[rix];
|
|
u32 ratekbps = rc->rate_table->info[i].ratekbps;
|
|
struct ath_rc_stats *stats = &rc->rcstats[i];
|
|
char mcs[5];
|
|
char htmode[5];
|
|
int used_mcs = 0, used_htmode = 0;
|
|
|
|
if (WLAN_RC_PHY_HT(rc->rate_table->info[i].phy)) {
|
|
used_mcs = snprintf(mcs, 5, "%d",
|
|
rc->rate_table->info[i].ratecode);
|
|
|
|
if (WLAN_RC_PHY_40(rc->rate_table->info[i].phy))
|
|
used_htmode = snprintf(htmode, 5, "HT40");
|
|
else if (WLAN_RC_PHY_20(rc->rate_table->info[i].phy))
|
|
used_htmode = snprintf(htmode, 5, "HT20");
|
|
else
|
|
used_htmode = snprintf(htmode, 5, "????");
|
|
}
|
|
|
|
mcs[used_mcs] = '\0';
|
|
htmode[used_htmode] = '\0';
|
|
|
|
len += snprintf(buf + len, max - len,
|
|
"%6s %6s %3u.%d: "
|
|
"%10u %10u %10u %10u\n",
|
|
htmode,
|
|
mcs,
|
|
ratekbps / 1000,
|
|
(ratekbps % 1000) / 100,
|
|
stats->success,
|
|
stats->retries,
|
|
stats->xretries,
|
|
stats->per);
|
|
}
|
|
|
|
if (len > max)
|
|
len = max;
|
|
|
|
retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
|
|
kfree(buf);
|
|
return retval;
|
|
}
|
|
|
|
static const struct file_operations fops_rcstat = {
|
|
.read = read_file_rcstat,
|
|
.open = simple_open,
|
|
.owner = THIS_MODULE
|
|
};
|
|
|
|
static void ath_rate_add_sta_debugfs(void *priv, void *priv_sta,
|
|
struct dentry *dir)
|
|
{
|
|
struct ath_rate_priv *rc = priv_sta;
|
|
rc->debugfs_rcstats = debugfs_create_file("rc_stats", S_IRUGO,
|
|
dir, rc, &fops_rcstat);
|
|
}
|
|
|
|
static void ath_rate_remove_sta_debugfs(void *priv, void *priv_sta)
|
|
{
|
|
struct ath_rate_priv *rc = priv_sta;
|
|
debugfs_remove(rc->debugfs_rcstats);
|
|
}
|
|
|
|
#endif /* CONFIG_MAC80211_DEBUGFS && CONFIG_ATH9K_DEBUGFS */
|
|
|
|
static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir)
|
|
{
|
|
return hw->priv;
|
|
}
|
|
|
|
static void ath_rate_free(void *priv)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
|
|
{
|
|
return kzalloc(sizeof(struct ath_rate_priv), gfp);
|
|
}
|
|
|
|
static void ath_rate_free_sta(void *priv, struct ieee80211_sta *sta,
|
|
void *priv_sta)
|
|
{
|
|
struct ath_rate_priv *rate_priv = priv_sta;
|
|
kfree(rate_priv);
|
|
}
|
|
|
|
static struct rate_control_ops ath_rate_ops = {
|
|
.module = NULL,
|
|
.name = "ath9k_rate_control",
|
|
.tx_status = ath_tx_status,
|
|
.get_rate = ath_get_rate,
|
|
.rate_init = ath_rate_init,
|
|
.rate_update = ath_rate_update,
|
|
.alloc = ath_rate_alloc,
|
|
.free = ath_rate_free,
|
|
.alloc_sta = ath_rate_alloc_sta,
|
|
.free_sta = ath_rate_free_sta,
|
|
|
|
#if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_DEBUGFS)
|
|
.add_sta_debugfs = ath_rate_add_sta_debugfs,
|
|
.remove_sta_debugfs = ath_rate_remove_sta_debugfs,
|
|
#endif
|
|
};
|
|
|
|
int ath_rate_control_register(void)
|
|
{
|
|
return ieee80211_rate_control_register(&ath_rate_ops);
|
|
}
|
|
|
|
void ath_rate_control_unregister(void)
|
|
{
|
|
ieee80211_rate_control_unregister(&ath_rate_ops);
|
|
}
|