diff options
Diffstat (limited to 'drivers/net/wireless/ath9k/rc.c')
| -rw-r--r-- | drivers/net/wireless/ath9k/rc.c | 2126 |
1 files changed, 0 insertions, 2126 deletions
diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c deleted file mode 100644 index e0797afee52b..000000000000 --- a/drivers/net/wireless/ath9k/rc.c +++ /dev/null @@ -1,2126 +0,0 @@ -/* - * Copyright (c) 2004 Video54 Technologies, Inc. - * Copyright (c) 2004-2008 Atheros Communications, Inc. - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES - * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR - * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES - * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN - * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF - * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. - */ - -/* - * Atheros rate control algorithm - */ - -#include "core.h" -#include "../net/mac80211/rate.h" - -static u32 tx_triglevel_max; - -static struct ath_rate_table ar5416_11na_ratetable = { - 42, - { - { TRUE, TRUE, WLAN_PHY_OFDM, 6000, /* 6 Mb */ - 5400, 0x0b, 0x00, 12, - 0, 2, 1, 0, 0, 0, 0, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 9000, /* 9 Mb */ - 7800, 0x0f, 0x00, 18, - 0, 3, 1, 1, 1, 1, 1, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 12000, /* 12 Mb */ - 10000, 0x0a, 0x00, 24, - 2, 4, 2, 2, 2, 2, 2, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 18000, /* 18 Mb */ - 13900, 0x0e, 0x00, 36, - 2, 6, 2, 3, 3, 3, 3, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 24000, /* 24 Mb */ - 17300, 0x09, 0x00, 48, - 4, 10, 3, 4, 4, 4, 4, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 36000, /* 36 Mb */ - 23000, 0x0d, 0x00, 72, - 4, 14, 3, 5, 5, 5, 5, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 48000, /* 48 Mb */ - 27400, 0x08, 0x00, 96, - 4, 20, 3, 6, 6, 6, 6, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 54000, /* 54 Mb */ - 29300, 0x0c, 0x00, 108, - 4, 23, 3, 7, 7, 7, 7, 0 }, - { TRUE_20, TRUE_20, WLAN_PHY_HT_20_SS, 6500, /* 6.5 Mb */ - 6400, 0x80, 0x00, 0, - 0, 2, 3, 8, 24, 8, 24, 3216 }, - { TRUE_20, TRUE_20, WLAN_PHY_HT_20_SS, 13000, /* 13 Mb */ - 12700, 0x81, 0x00, 1, - 2, 4, 3, 9, 25, 9, 25, 6434 }, - { TRUE_20, TRUE_20, WLAN_PHY_HT_20_SS, 19500, /* 19.5 Mb */ - 18800, 0x82, 0x00, 2, - 2, 6, 3, 10, 26, 10, 26, 9650 }, - { TRUE_20, TRUE_20, WLAN_PHY_HT_20_SS, 26000, /* 26 Mb */ - 25000, 0x83, 0x00, 3, - 4, 10, 3, 11, 27, 11, 27, 12868 }, - { TRUE_20, TRUE_20, WLAN_PHY_HT_20_SS, 39000, /* 39 Mb */ - 36700, 0x84, 0x00, 4, - 4, 14, 3, 12, 28, 12, 28, 19304 }, - { FALSE, TRUE_20, WLAN_PHY_HT_20_SS, 52000, /* 52 Mb */ - 48100, 0x85, 0x00, 5, - 4, 20, 3, 13, 29, 13, 29, 25740 }, - { FALSE, TRUE_20, WLAN_PHY_HT_20_SS, 58500, /* 58.5 Mb */ - 53500, 0x86, 0x00, 6, - 4, 23, 3, 14, 30, 14, 30, 28956 }, - { FALSE, TRUE_20, WLAN_PHY_HT_20_SS, 65000, /* 65 Mb */ - 59000, 0x87, 0x00, 7, - 4, 25, 3, 15, 31, 15, 32, 32180 }, - { FALSE, FALSE, WLAN_PHY_HT_20_DS, 13000, /* 13 Mb */ - 12700, 0x88, 0x00, - 8, 0, 2, 3, 16, 33, 16, 33, 6430 }, - { FALSE, FALSE, WLAN_PHY_HT_20_DS, 26000, /* 26 Mb */ - 24800, 0x89, 0x00, 9, - 2, 4, 3, 17, 34, 17, 34, 12860 }, - { FALSE, FALSE, WLAN_PHY_HT_20_DS, 39000, /* 39 Mb */ - 36600, 0x8a, 0x00, 10, - 2, 6, 3, 18, 35, 18, 35, 19300 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 52000, /* 52 Mb */ - 48100, 0x8b, 0x00, 11, - 4, 10, 3, 19, 36, 19, 36, 25736 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 78000, /* 78 Mb */ - 69500, 0x8c, 0x00, 12, - 4, 14, 3, 20, 37, 20, 37, 38600 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 104000, /* 104 Mb */ - 89500, 0x8d, 0x00, 13, - 4, 20, 3, 21, 38, 21, 38, 51472 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 117000, /* 117 Mb */ - 98900, 0x8e, 0x00, 14, - 4, 23, 3, 22, 39, 22, 39, 57890 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 130000, /* 130 Mb */ - 108300, 0x8f, 0x00, 15, - 4, 25, 3, 23, 40, 23, 41, 64320 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 13500, /* 13.5 Mb */ - 13200, 0x80, 0x00, 0, - 0, 2, 3, 8, 24, 24, 24, 6684 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 27500, /* 27.0 Mb */ - 25900, 0x81, 0x00, 1, - 2, 4, 3, 9, 25, 25, 25, 13368 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 40500, /* 40.5 Mb */ - 38600, 0x82, 0x00, 2, - 2, 6, 3, 10, 26, 26, 26, 20052 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 54000, /* 54 Mb */ - 49800, 0x83, 0x00, 3, - 4, 10, 3, 11, 27, 27, 27, 26738 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 81500, /* 81 Mb */ - 72200, 0x84, 0x00, 4, - 4, 14, 3, 12, 28, 28, 28, 40104 }, - { FALSE, TRUE_40, WLAN_PHY_HT_40_SS, 108000, /* 108 Mb */ - 92900, 0x85, 0x00, 5, - 4, 20, 3, 13, 29, 29, 29, 53476 }, - { FALSE, TRUE_40, WLAN_PHY_HT_40_SS, 121500, /* 121.5 Mb */ - 102700, 0x86, 0x00, 6, - 4, 23, 3, 14, 30, 30, 30, 60156 }, - { FALSE, TRUE_40, WLAN_PHY_HT_40_SS, 135000, /* 135 Mb */ - 112000, 0x87, 0x00, 7, - 4, 25, 3, 15, 31, 32, 32, 66840 }, - { FALSE, TRUE_40, WLAN_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ - 122000, 0x87, 0x00, 7, - 4, 25, 3, 15, 31, 32, 32, 74200 }, - { FALSE, FALSE, WLAN_PHY_HT_40_DS, 27000, /* 27 Mb */ - 25800, 0x88, 0x00, 8, - 0, 2, 3, 16, 33, 33, 33, 13360 }, - { FALSE, FALSE, WLAN_PHY_HT_40_DS, 54000, /* 54 Mb */ - 49800, 0x89, 0x00, 9, - 2, 4, 3, 17, 34, 34, 34, 26720 }, - { FALSE, FALSE, WLAN_PHY_HT_40_DS, 81000, /* 81 Mb */ - 71900, 0x8a, 0x00, 10, - 2, 6, 3, 18, 35, 35, 35, 40080 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 108000, /* 108 Mb */ - 92500, 0x8b, 0x00, 11, - 4, 10, 3, 19, 36, 36, 36, 53440 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 162000, /* 162 Mb */ - 130300, 0x8c, 0x00, 12, - 4, 14, 3, 20, 37, 37, 37, 80160 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 216000, /* 216 Mb */ - 162800, 0x8d, 0x00, 13, - 4, 20, 3, 21, 38, 38, 38, 106880 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 243000, /* 243 Mb */ - 178200, 0x8e, 0x00, 14, - 4, 23, 3, 22, 39, 39, 39, 120240 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 270000, /* 270 Mb */ - 192100, 0x8f, 0x00, 15, - 4, 25, 3, 23, 40, 41, 41, 133600 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS_HGI, 300000, /* 300 Mb */ - 207000, 0x8f, 0x00, 15, - 4, 25, 3, 23, 40, 41, 41, 148400 }, - }, - 50, /* probe interval */ - 50, /* rssi reduce interval */ - WLAN_RC_HT_FLAG, /* Phy rates allowed initially */ -}; - -/* TRUE_ALL - valid for 20/40/Legacy, - * TRUE - Legacy only, - * TRUE_20 - HT 20 only, - * TRUE_40 - HT 40 only */ - -/* 4ms frame limit not used for NG mode. The values filled - * for HT are the 64K max aggregate limit */ - -static struct ath_rate_table ar5416_11ng_ratetable = { - 46, - { - { TRUE_ALL, TRUE_ALL, WLAN_PHY_CCK, 1000, /* 1 Mb */ - 900, 0x1b, 0x00, 2, - 0, 0, 1, 0, 0, 0, 0, 0 }, - { TRUE_ALL, TRUE_ALL, WLAN_PHY_CCK, 2000, /* 2 Mb */ - 1900, 0x1a, 0x04, 4, - 1, 1, 1, 1, 1, 1, 1, 0 }, - { TRUE_ALL, TRUE_ALL, WLAN_PHY_CCK, 5500, /* 5.5 Mb */ - 4900, 0x19, 0x04, 11, - 2, 2, 2, 2, 2, 2, 2, 0 }, - { TRUE_ALL, TRUE_ALL, WLAN_PHY_CCK, 11000, /* 11 Mb */ - 8100, 0x18, 0x04, 22, - 3, 3, 2, 3, 3, 3, 3, 0 }, - { FALSE, FALSE, WLAN_PHY_OFDM, 6000, /* 6 Mb */ - 5400, 0x0b, 0x00, 12, - 4, 2, 1, 4, 4, 4, 4, 0 }, - { FALSE, FALSE, WLAN_PHY_OFDM, 9000, /* 9 Mb */ - 7800, 0x0f, 0x00, 18, - 4, 3, 1, 5, 5, 5, 5, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 12000, /* 12 Mb */ - 10100, 0x0a, 0x00, 24, - 6, 4, 1, 6, 6, 6, 6, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 18000, /* 18 Mb */ - 14100, 0x0e, 0x00, 36, - 6, 6, 2, 7, 7, 7, 7, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 24000, /* 24 Mb */ - 17700, 0x09, 0x00, 48, - 8, 10, 3, 8, 8, 8, 8, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 36000, /* 36 Mb */ - 23700, 0x0d, 0x00, 72, - 8, 14, 3, 9, 9, 9, 9, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 48000, /* 48 Mb */ - 27400, 0x08, 0x00, 96, - 8, 20, 3, 10, 10, 10, 10, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 54000, /* 54 Mb */ - 30900, 0x0c, 0x00, 108, - 8, 23, 3, 11, 11, 11, 11, 0 }, - { FALSE, FALSE, WLAN_PHY_HT_20_SS, 6500, /* 6.5 Mb */ - 6400, 0x80, 0x00, 0, - 4, 2, 3, 12, 28, 12, 28, 3216 }, - { TRUE_20, TRUE_20, WLAN_PHY_HT_20_SS, 13000, /* 13 Mb */ - 12700, 0x81, 0x00, 1, - 6, 4, 3, 13, 29, 13, 29, 6434 }, - { TRUE_20, TRUE_20, WLAN_PHY_HT_20_SS, 19500, /* 19.5 Mb */ - 18800, 0x82, 0x00, 2, - 6, 6, 3, 14, 30, 14, 30, 9650 }, - { TRUE_20, TRUE_20, WLAN_PHY_HT_20_SS, 26000, /* 26 Mb */ - 25000, 0x83, 0x00, 3, - 8, 10, 3, 15, 31, 15, 31, 12868 }, - { TRUE_20, TRUE_20, WLAN_PHY_HT_20_SS, 39000, /* 39 Mb */ - 36700, 0x84, 0x00, 4, - 8, 14, 3, 16, 32, 16, 32, 19304 }, - { FALSE, TRUE_20, WLAN_PHY_HT_20_SS, 52000, /* 52 Mb */ - 48100, 0x85, 0x00, 5, - 8, 20, 3, 17, 33, 17, 33, 25740 }, - { FALSE, TRUE_20, WLAN_PHY_HT_20_SS, 58500, /* 58.5 Mb */ - 53500, 0x86, 0x00, 6, - 8, 23, 3, 18, 34, 18, 34, 28956 }, - { FALSE, TRUE_20, WLAN_PHY_HT_20_SS, 65000, /* 65 Mb */ - 59000, 0x87, 0x00, 7, - 8, 25, 3, 19, 35, 19, 36, 32180 }, - { FALSE, FALSE, WLAN_PHY_HT_20_DS, 13000, /* 13 Mb */ - 12700, 0x88, 0x00, 8, - 4, 2, 3, 20, 37, 20, 37, 6430 }, - { FALSE, FALSE, WLAN_PHY_HT_20_DS, 26000, /* 26 Mb */ - 24800, 0x89, 0x00, 9, - 6, 4, 3, 21, 38, 21, 38, 12860 }, - { FALSE, FALSE, WLAN_PHY_HT_20_DS, 39000, /* 39 Mb */ - 36600, 0x8a, 0x00, 10, - 6, 6, 3, 22, 39, 22, 39, 19300 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 52000, /* 52 Mb */ - 48100, 0x8b, 0x00, 11, - 8, 10, 3, 23, 40, 23, 40, 25736 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 78000, /* 78 Mb */ - 69500, 0x8c, 0x00, 12, - 8, 14, 3, 24, 41, 24, 41, 38600 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 104000, /* 104 Mb */ - 89500, 0x8d, 0x00, 13, - 8, 20, 3, 25, 42, 25, 42, 51472 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 117000, /* 117 Mb */ - 98900, 0x8e, 0x00, 14, - 8, 23, 3, 26, 43, 26, 44, 57890 }, - { TRUE_20, FALSE, WLAN_PHY_HT_20_DS, 130000, /* 130 Mb */ - 108300, 0x8f, 0x00, 15, - 8, 25, 3, 27, 44, 27, 45, 64320 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 13500, /* 13.5 Mb */ - 13200, 0x80, 0x00, 0, - 8, 2, 3, 12, 28, 28, 28, 6684 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 27500, /* 27.0 Mb */ - 25900, 0x81, 0x00, 1, - 8, 4, 3, 13, 29, 29, 29, 13368 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 40500, /* 40.5 Mb */ - 38600, 0x82, 0x00, 2, - 8, 6, 3, 14, 30, 30, 30, 20052 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 54000, /* 54 Mb */ - 49800, 0x83, 0x00, 3, - 8, 10, 3, 15, 31, 31, 31, 26738 }, - { TRUE_40, TRUE_40, WLAN_PHY_HT_40_SS, 81500, /* 81 Mb */ - 72200, 0x84, 0x00, 4, - 8, 14, 3, 16, 32, 32, 32, 40104 }, - { FALSE, TRUE_40, WLAN_PHY_HT_40_SS, 108000, /* 108 Mb */ - 92900, 0x85, 0x00, 5, - 8, 20, 3, 17, 33, 33, 33, 53476 }, - { FALSE, TRUE_40, WLAN_PHY_HT_40_SS, 121500, /* 121.5 Mb */ - 102700, 0x86, 0x00, 6, - 8, 23, 3, 18, 34, 34, 34, 60156 }, - { FALSE, TRUE_40, WLAN_PHY_HT_40_SS, 135000, /* 135 Mb */ - 112000, 0x87, 0x00, 7, - 8, 23, 3, 19, 35, 36, 36, 66840 }, - { FALSE, TRUE_40, WLAN_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ - 122000, 0x87, 0x00, 7, - 8, 25, 3, 19, 35, 36, 36, 74200 }, - { FALSE, FALSE, WLAN_PHY_HT_40_DS, 27000, /* 27 Mb */ - 25800, 0x88, 0x00, 8, - 8, 2, 3, 20, 37, 37, 37, 13360 }, - { FALSE, FALSE, WLAN_PHY_HT_40_DS, 54000, /* 54 Mb */ - 49800, 0x89, 0x00, 9, - 8, 4, 3, 21, 38, 38, 38, 26720 }, - { FALSE, FALSE, WLAN_PHY_HT_40_DS, 81000, /* 81 Mb */ - 71900, 0x8a, 0x00, 10, - 8, 6, 3, 22, 39, 39, 39, 40080 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 108000, /* 108 Mb */ - 92500, 0x8b, 0x00, 11, - 8, 10, 3, 23, 40, 40, 40, 53440 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 162000, /* 162 Mb */ - 130300, 0x8c, 0x00, 12, - 8, 14, 3, 24, 41, 41, 41, 80160 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 216000, /* 216 Mb */ - 162800, 0x8d, 0x00, 13, - 8, 20, 3, 25, 42, 42, 42, 106880 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 243000, /* 243 Mb */ - 178200, 0x8e, 0x00, 14, - 8, 23, 3, 26, 43, 43, 43, 120240 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS, 270000, /* 270 Mb */ - 192100, 0x8f, 0x00, 15, - 8, 23, 3, 27, 44, 45, 45, 133600 }, - { TRUE_40, FALSE, WLAN_PHY_HT_40_DS_HGI, 300000, /* 300 Mb */ - 207000, 0x8f, 0x00, 15, - 8, 25, 3, 27, 44, 45, 45, 148400 }, - }, - 50, /* probe interval */ - 50, /* rssi reduce interval */ - WLAN_RC_HT_FLAG, /* Phy rates allowed initially */ -}; - -static struct ath_rate_table ar5416_11a_ratetable = { - 8, - { - { TRUE, TRUE, WLAN_PHY_OFDM, 6000, /* 6 Mb */ - 5400, 0x0b, 0x00, (0x80|12), - 0, 2, 1, 0, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 9000, /* 9 Mb */ - 7800, 0x0f, 0x00, 18, - 0, 3, 1, 1, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 12000, /* 12 Mb */ - 10000, 0x0a, 0x00, (0x80|24), - 2, 4, 2, 2, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 18000, /* 18 Mb */ - 13900, 0x0e, 0x00, 36, - 2, 6, 2, 3, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 24000, /* 24 Mb */ - 17300, 0x09, 0x00, (0x80|48), - 4, 10, 3, 4, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 36000, /* 36 Mb */ - 23000, 0x0d, 0x00, 72, - 4, 14, 3, 5, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 48000, /* 48 Mb */ - 27400, 0x08, 0x00, 96, - 4, 19, 3, 6, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 54000, /* 54 Mb */ - 29300, 0x0c, 0x00, 108, - 4, 23, 3, 7, 0 }, - }, - 50, /* probe interval */ - 50, /* rssi reduce interval */ - 0, /* Phy rates allowed initially */ -}; - -static struct ath_rate_table ar5416_11a_ratetable_Half = { - 8, - { - { TRUE, TRUE, WLAN_PHY_OFDM, 3000, /* 6 Mb */ - 2700, 0x0b, 0x00, (0x80|6), - 0, 2, 1, 0, 0}, - { TRUE, TRUE, WLAN_PHY_OFDM, 4500, /* 9 Mb */ - 3900, 0x0f, 0x00, 9, - 0, 3, 1, 1, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 6000, /* 12 Mb */ - 5000, 0x0a, 0x00, (0x80|12), - 2, 4, 2, 2, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 9000, /* 18 Mb */ - 6950, 0x0e, 0x00, 18, - 2, 6, 2, 3, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 12000, /* 24 Mb */ - 8650, 0x09, 0x00, (0x80|24), - 4, 10, 3, 4, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 18000, /* 36 Mb */ - 11500, 0x0d, 0x00, 36, - 4, 14, 3, 5, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 24000, /* 48 Mb */ - 13700, 0x08, 0x00, 48, - 4, 19, 3, 6, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 27000, /* 54 Mb */ - 14650, 0x0c, 0x00, 54, - 4, 23, 3, 7, 0 }, - }, - 50, /* probe interval */ - 50, /* rssi reduce interval */ - 0, /* Phy rates allowed initially */ -}; - -static struct ath_rate_table ar5416_11a_ratetable_Quarter = { - 8, - { - { TRUE, TRUE, WLAN_PHY_OFDM, 1500, /* 6 Mb */ - 1350, 0x0b, 0x00, (0x80|3), - 0, 2, 1, 0, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 2250, /* 9 Mb */ - 1950, 0x0f, 0x00, 4, - 0, 3, 1, 1, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 3000, /* 12 Mb */ - 2500, 0x0a, 0x00, (0x80|6), - 2, 4, 2, 2, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 4500, /* 18 Mb */ - 3475, 0x0e, 0x00, 9, - 2, 6, 2, 3, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 6000, /* 25 Mb */ - 4325, 0x09, 0x00, (0x80|12), - 4, 10, 3, 4, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 9000, /* 36 Mb */ - 5750, 0x0d, 0x00, 18, - 4, 14, 3, 5, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 12000, /* 48 Mb */ - 6850, 0x08, 0x00, 24, - 4, 19, 3, 6, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 13500, /* 54 Mb */ - 7325, 0x0c, 0x00, 27, - 4, 23, 3, 7, 0 }, - }, - 50, /* probe interval */ - 50, /* rssi reduce interval */ - 0, /* Phy rates allowed initially */ -}; - -static struct ath_rate_table ar5416_11g_ratetable = { - 12, - { - { TRUE, TRUE, WLAN_PHY_CCK, 1000, /* 1 Mb */ - 900, 0x1b, 0x00, 2, - 0, 0, 1, 0, 0 }, - { TRUE, TRUE, WLAN_PHY_CCK, 2000, /* 2 Mb */ - 1900, 0x1a, 0x04, 4, - 1, 1, 1, 1, 0 }, - { TRUE, TRUE, WLAN_PHY_CCK, 5500, /* 5.5 Mb */ - 4900, 0x19, 0x04, 11, - 2, 2, 2, 2, 0 }, - { TRUE, TRUE, WLAN_PHY_CCK, 11000, /* 11 Mb */ - 8100, 0x18, 0x04, 22, - 3, 3, 2, 3, 0 }, - { FALSE, FALSE, WLAN_PHY_OFDM, 6000, /* 6 Mb */ - 5400, 0x0b, 0x00, 12, - 4, 2, 1, 4, 0 }, - { FALSE, FALSE, WLAN_PHY_OFDM, 9000, /* 9 Mb */ - 7800, 0x0f, 0x00, 18, - 4, 3, 1, 5, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 12000, /* 12 Mb */ - 10000, 0x0a, 0x00, 24, - 6, 4, 1, 6, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 18000, /* 18 Mb */ - 13900, 0x0e, 0x00, 36, - 6, 6, 2, 7, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 24000, /* 24 Mb */ - 17300, 0x09, 0x00, 48, - 8, 10, 3, 8, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 36000, /* 36 Mb */ - 23000, 0x0d, 0x00, 72, - 8, 14, 3, 9, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 48000, /* 48 Mb */ - 27400, 0x08, 0x00, 96, - 8, 19, 3, 10, 0 }, - { TRUE, TRUE, WLAN_PHY_OFDM, 54000, /* 54 Mb */ - 29300, 0x0c, 0x00, 108, - 8, 23, 3, 11, 0 }, - }, - 50, /* probe interval */ - 50, /* rssi reduce interval */ - 0, /* Phy rates allowed initially */ -}; - -static struct ath_rate_table ar5416_11b_ratetable = { - 4, - { - { TRUE, TRUE, WLAN_PHY_CCK, 1000, /* 1 Mb */ - 900, 0x1b, 0x00, (0x80|2), - 0, 0, 1, 0, 0 }, - { TRUE, TRUE, WLAN_PHY_CCK, 2000, /* 2 Mb */ - 1800, 0x1a, 0x04, (0x80|4), - 1, 1, 1, 1, 0 }, - { TRUE, TRUE, WLAN_PHY_CCK, 5500, /* 5.5 Mb */ - 4300, 0x19, 0x04, (0x80|11), - 1, 2, 2, 2, 0 }, - { TRUE, TRUE, WLAN_PHY_CCK, 11000, /* 11 Mb */ - 7100, 0x18, 0x04, (0x80|22), - 1, 4, 100, 3, 0 }, - }, - 100, /* probe interval */ - 100, /* rssi reduce interval */ - 0, /* Phy rates allowed initially */ -}; - -static void ar5416_attach_ratetables(struct ath_rate_softc *sc) -{ - /* - * Attach rate tables. - */ - sc->hw_rate_table[WIRELESS_MODE_11b] = &ar5416_11b_ratetable; - sc->hw_rate_table[WIRELESS_MODE_11a] = &ar5416_11a_ratetable; - sc->hw_rate_table[WIRELESS_MODE_11g] = &ar5416_11g_ratetable; - - sc->hw_rate_table[WIRELESS_MODE_11NA_HT20] = &ar5416_11na_ratetable; - sc->hw_rate_table[WIRELESS_MODE_11NG_HT20] = &ar5416_11ng_ratetable; - sc->hw_rate_table[WIRELESS_MODE_11NA_HT40PLUS] = - &ar5416_11na_ratetable; - sc->hw_rate_table[WIRELESS_MODE_11NA_HT40MINUS] = - &ar5416_11na_ratetable; - sc->hw_rate_table[WIRELESS_MODE_11NG_HT40PLUS] = - &ar5416_11ng_ratetable; - sc->hw_rate_table[WIRELESS_MODE_11NG_HT40MINUS] = - &ar5416_11ng_ratetable; -} - -static void ar5416_setquarter_ratetable(struct ath_rate_softc *sc) -{ - sc->hw_rate_table[WIRELESS_MODE_11a] = &ar5416_11a_ratetable_Quarter; - return; -} - -static void ar5416_sethalf_ratetable(struct ath_rate_softc *sc) -{ - sc->hw_rate_table[WIRELESS_MODE_11a] = &ar5416_11a_ratetable_Half; - return; -} - -static void ar5416_setfull_ratetable(struct ath_rate_softc *sc) -{ - sc->hw_rate_table[WIRELESS_MODE_11a] = &ar5416_11a_ratetable; - return; -} - -/* - * Return the median of three numbers - */ -static inline int8_t median(int8_t a, int8_t b, int8_t c) -{ - if (a >= b) { - if (b >= c) - return b; - else if (a > c) - return c; - else - return a; - } else { - if (a >= c) - return a; - else if (b >= c) - return c; - else - return b; - } -} - -static void ath_rc_sort_validrates(const struct ath_rate_table *rate_table, - struct ath_tx_ratectrl *rate_ctrl) -{ - u8 i, j, idx, idx_next; - - for (i = rate_ctrl->max_valid_rate - 1; i > 0; i--) { - for (j = 0; j <= i-1; j++) { - idx = rate_ctrl->valid_rate_index[j]; - idx_next = rate_ctrl->valid_rate_index[j+1]; - - if (rate_table->info[idx].ratekbps > - rate_table->info[idx_next].ratekbps) { - rate_ctrl->valid_rate_index[j] = idx_next; - rate_ctrl->valid_rate_index[j+1] = idx; - } - } - } -} - -/* Access functions for valid_txrate_mask */ - -static void ath_rc_init_valid_txmask(struct ath_tx_ratectrl *rate_ctrl) -{ - u8 i; - - for (i = 0; i < rate_ctrl->rate_table_size; i++) - rate_ctrl->valid_rate_index[i] = FALSE; -} - -static inline void ath_rc_set_valid_txmask(struct ath_tx_ratectrl *rate_ctrl, - u8 index, int valid_tx_rate) -{ - ASSERT(index <= rate_ctrl->rate_table_size); - rate_ctrl->valid_rate_index[index] = valid_tx_rate ? TRUE : FALSE; -} - -static inline int ath_rc_isvalid_txmask(struct ath_tx_ratectrl *rate_ctrl, - u8 index) -{ - ASSERT(index <= rate_ctrl->rate_table_size); - return rate_ctrl->valid_rate_index[index]; -} - -/* Iterators for valid_txrate_mask */ -static inline int -ath_rc_get_nextvalid_txrate(const struct ath_rate_table *rate_table, - struct ath_tx_ratectrl *rate_ctrl, - u8 cur_valid_txrate, - u8 *next_idx) -{ - u8 i; - - for (i = 0; i < rate_ctrl->max_valid_rate - 1; i++) { - if (rate_ctrl->valid_rate_index[i] == cur_valid_txrate) { - *next_idx = rate_ctrl->valid_rate_index[i+1]; - return TRUE; - } - } - - /* No more valid rates */ - *next_idx = 0; - return FALSE; -} - -/* 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 FALSE; - if (WLAN_RC_PHY_DS(phy) && !(capflag & WLAN_RC_DS_FLAG)) - return FALSE; - if (WLAN_RC_PHY_SGI(phy) && !(capflag & WLAN_RC_SGI_FLAG)) - return FALSE; - if (!ignore_cw && WLAN_RC_PHY_HT(phy)) - if (WLAN_RC_PHY_40(phy) && !(capflag & WLAN_RC_40_FLAG)) - return FALSE; - if (!WLAN_RC_PHY_40(phy) && (capflag & WLAN_RC_40_FLAG)) - return FALSE; - return TRUE; -} - -static inline int -ath_rc_get_nextlowervalid_txrate(const struct ath_rate_table *rate_table, - struct ath_tx_ratectrl *rate_ctrl, - u8 cur_valid_txrate, u8 *next_idx) -{ - int8_t i; - - for (i = 1; i < rate_ctrl->max_valid_rate ; i++) { - if (rate_ctrl->valid_rate_index[i] == cur_valid_txrate) { - *next_idx = rate_ctrl->valid_rate_index[i-1]; - return TRUE; - } - } - return FALSE; -} - -/* - * Initialize the Valid Rate Index from valid entries in Rate Table - */ -static u8 -ath_rc_sib_init_validrates(struct ath_rate_node *ath_rc_priv, - const struct ath_rate_table *rate_table, - u32 capflag) -{ - struct ath_tx_ratectrl *rate_ctrl; - u8 i, hi = 0; - u32 valid; - - rate_ctrl = (struct ath_tx_ratectrl *)(ath_rc_priv); - for (i = 0; i < rate_table->rate_cnt; i++) { - valid = (ath_rc_priv->single_stream ? - rate_table->info[i].valid_single_stream : - rate_table->info[i].valid); - if (valid == TRUE) { - u32 phy = rate_table->info[i].phy; - u8 valid_rate_count = 0; - - if (!ath_rc_valid_phyrate(phy, capflag, FALSE)) - continue; - - valid_rate_count = rate_ctrl->valid_phy_ratecnt[phy]; - - rate_ctrl->valid_phy_rateidx[phy][valid_rate_count] = i; - rate_ctrl->valid_phy_ratecnt[phy] += 1; - ath_rc_set_valid_txmask(rate_ctrl, i, TRUE); - hi = A_MAX(hi, i); - } - } - return hi; -} - -/* - * Initialize the Valid Rate Index from Rate Set - */ -static u8 -ath_rc_sib_setvalid_rates(struct ath_rate_node *ath_rc_priv, - const struct ath_rate_table *rate_table, - struct ath_rateset *rateset, - u32 capflag) -{ - /* XXX: Clean me up and make identation friendly */ - u8 i, j, hi = 0; - struct ath_tx_ratectrl *rate_ctrl = - (struct ath_tx_ratectrl *)(ath_rc_priv); - - /* Use intersection of working rates and valid rates */ - for (i = 0; i < rateset->rs_nrates; i++) { - for (j = 0; j < rate_table->rate_cnt; j++) { - u32 phy = rate_table->info[j].phy; - u32 valid = (ath_rc_priv->single_stream ? - rate_table->info[j].valid_single_stream : - rate_table->info[j].valid); - - /* We allow a rate only if its valid and the - * capflag matches one of the validity - * (TRUE/TRUE_20/TRUE_40) flags */ - - /* XXX: catch the negative of this branch - * first and then continue */ - if (((rateset->rs_rates[i] & 0x7F) == - (rate_table->info[j].dot11rate & 0x7F)) && - ((valid & WLAN_RC_CAP_MODE(capflag)) == - WLAN_RC_CAP_MODE(capflag)) && - !WLAN_RC_PHY_HT(phy)) { - - u8 valid_rate_count = 0; - - if (!ath_rc_valid_phyrate(phy, capflag, FALSE)) - continue; - - valid_rate_count = - rate_ctrl->valid_phy_ratecnt[phy]; - - rate_ctrl->valid_phy_rateidx[phy] - [valid_rate_count] = j; - rate_ctrl->valid_phy_ratecnt[phy] += 1; - ath_rc_set_valid_txmask(rate_ctrl, j, TRUE); - hi = A_MAX(hi, j); - } - } - } - return hi; -} - -static u8 -ath_rc_sib_setvalid_htrates(struct ath_rate_node *ath_rc_priv, - const struct ath_rate_table *rate_table, - u8 *mcs_set, u32 capflag) -{ - u8 i, j, hi = 0; - struct ath_tx_ratectrl *rate_ctrl = - (struct ath_tx_ratectrl *)(ath_rc_priv); - - /* Use intersection of working rates and valid rates */ - for (i = 0; i < ((struct ath_rateset *)mcs_set)->rs_nrates; i++) { - for (j = 0; j < rate_table->rate_cnt; j++) { - u32 phy = rate_table->info[j].phy; - u32 valid = (ath_rc_priv->single_stream ? - rate_table->info[j].valid_single_stream : - rate_table->info[j].valid); - - if (((((struct ath_rateset *) - mcs_set)->rs_rates[i] & 0x7F) != - (rate_table->info[j].dot11rate & 0x7F)) || - !WLAN_RC_PHY_HT(phy) || - !WLAN_RC_PHY_HT_VALID(valid, capflag)) - continue; - - if (!ath_rc_valid_phyrate(phy, capflag, FALSE)) - continue; - - rate_ctrl->valid_phy_rateidx[phy] - [rate_ctrl->valid_phy_ratecnt[phy]] = j; - rate_ctrl->valid_phy_ratecnt[phy] += 1; - ath_rc_set_valid_txmask(rate_ctrl, j, TRUE); - hi = A_MAX(hi, j); - } - } - return hi; -} - -/* - * Attach to a device instance. Setup the public definition - * of how much per-node space we need and setup the private - * phy tables that have rate control parameters. - */ -struct ath_rate_softc *ath_rate_attach(struct ath_hal *ah) -{ - struct ath_rate_softc *asc; - - /* we are only in user context so we can sleep for memory */ - asc = kzalloc(sizeof(struct ath_rate_softc), GFP_KERNEL); - if (asc == NULL) - return NULL; - - ar5416_attach_ratetables(asc); - - /* Save Maximum TX Trigger Level (used for 11n) */ - tx_triglevel_max = ah->ah_caps.halTxTrigLevelMax; - /* return alias for ath_rate_softc * */ - return asc; -} - -static struct ath_rate_node *ath_rate_node_alloc(struct ath_vap *avp, - struct ath_rate_softc *rsc, - gfp_t gfp) -{ - struct ath_rate_node *anode; - - anode = kzalloc(sizeof(struct ath_rate_node), gfp); - if (anode == NULL) - return NULL; - - anode->avp = avp; - anode->asc = rsc; - avp->rc_node = anode; - - return anode; -} - -static void ath_rate_node_free(struct ath_rate_node *anode) -{ - if (anode != NULL) - kfree(anode); -} - -void ath_rate_detach(struct ath_rate_softc *asc) -{ - if (asc != NULL) - kfree(asc); -} - -u8 ath_rate_findrateix(struct ath_softc *sc, - u8 dot11rate) -{ - const struct ath_rate_table *ratetable; - struct ath_rate_softc *rsc = sc->sc_rc; - int i; - - ratetable = rsc->hw_rate_table[sc->sc_curmode]; - - if (WARN_ON(!ratetable)) - return 0; - - for (i = 0; i < ratetable->rate_cnt; i++) { - if ((ratetable->info[i].dot11rate & 0x7f) == (dot11rate & 0x7f)) - return i; - } - - return 0; -} - -/* - * Update rate-control state on a device state change. When - * operating as a station this includes associate/reassociate - * with an AP. Otherwise this gets called, for example, when - * the we transition to run state when operating as an AP. - */ -void ath_rate_newstate(struct ath_softc *sc, struct ath_vap *avp) -{ - struct ath_rate_softc *asc = sc->sc_rc; - - /* For half and quarter rate channles use different - * rate tables - */ - if (sc->sc_curchan.channelFlags & CHANNEL_HALF) - ar5416_sethalf_ratetable(asc); - else if (sc->sc_curchan.channelFlags & CHANNEL_QUARTER) - ar5416_setquarter_ratetable(asc); - else /* full rate */ - ar5416_setfull_ratetable(asc); - - if (avp->av_config.av_fixed_rateset != IEEE80211_FIXED_RATE_NONE) { - asc->fixedrix = - sc->sc_rixmap[avp->av_config.av_fixed_rateset & 0xff]; - /* NB: check the fixed rate exists */ - if (asc->fixedrix == 0xff) - asc->fixedrix = IEEE80211_FIXED_RATE_NONE; - } else { - asc->fixedrix = IEEE80211_FIXED_RATE_NONE; - } -} - -static u8 ath_rc_ratefind_ht(struct ath_softc *sc, - struct ath_rate_node *ath_rc_priv, - const struct ath_rate_table *rate_table, - int probe_allowed, int *is_probing, - int is_retry) -{ - u32 dt, best_thruput, this_thruput, now_msec; - u8 rate, next_rate, best_rate, maxindex, minindex; - int8_t rssi_last, rssi_reduce = 0, index = 0; - struct ath_tx_ratectrl *rate_ctrl = NULL; - - rate_ctrl = (struct ath_tx_ratectrl *)(ath_rc_priv ? - (ath_rc_priv) : NULL); - - *is_probing = FALSE; - - rssi_last = median(rate_ctrl->rssi_last, - rate_ctrl->rssi_last_prev, - rate_ctrl->rssi_last_prev2); - - /* - * Age (reduce) last ack rssi based on how old it is. - * The bizarre numbers are so the delta is 160msec, - * meaning we divide by 16. - * 0msec <= dt <= 25msec: don't derate - * 25msec <= dt <= 185msec: derate linearly from 0 to 10dB - * 185msec <= dt: derate by 10dB - */ - - now_msec = jiffies_to_msecs(jiffies); - dt = now_msec - rate_ctrl->rssi_time; - - if (dt >= 185) - rssi_reduce = 10; - else if (dt >= 25) - rssi_reduce = (u8)((dt - 25) >> 4); - - /* Now reduce rssi_last by rssi_reduce */ - if (rssi_last < rssi_reduce) - rssi_last = 0; - else - rssi_last -= rssi_reduce; - - /* - * Now look up the rate in the rssi table and return it. - * If no rates match then we return 0 (lowest rate) - */ - - best_thruput = 0; - maxindex = rate_ctrl->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 = rate_ctrl->valid_rate_index[index]; - if (rate > rate_ctrl->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 = rate_ctrl->state[rate].per; - 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; - - /* if we are retrying for more than half the number - * of max retries, use the min rate for the next retry - */ - if (is_retry) - rate = rate_ctrl->valid_rate_index[minindex]; - - rate_ctrl->rssi_last_lookup = rssi_last; - - /* - * Must check the actual rate (ratekbps) to account for - * non-monoticity of 11g's rate table - */ - - if (rate >= rate_ctrl->rate_max_phy && probe_allowed) { - rate = rate_ctrl->rate_max_phy; - - /* Probe the next allowed phy state */ - /* FIXME:XXXX Check to make sure ratMax is checked properly */ - if (ath_rc_get_nextvalid_txrate(rate_table, - rate_ctrl, rate, &next_rate) && - (now_msec - rate_ctrl->probe_time > - rate_table->probe_interval) && - (rate_ctrl->hw_maxretry_pktcnt >= 1)) { - rate = next_rate; - rate_ctrl->probe_rate = rate; - rate_ctrl->probe_time = now_msec; - rate_ctrl->hw_maxretry_pktcnt = 0; - *is_probing = TRUE; - } - } - - /* - * Make sure rate is not higher than the allowed maximum. - * We should also enforce the min, but I suspect the min is - * normally 1 rather than 0 because of the rate 9 vs 6 issue - * in the old code. - */ - if (rate > (rate_ctrl->rate_table_size - 1)) - rate = rate_ctrl->rate_table_size - 1; - - ASSERT((rate_table->info[rate].valid && !ath_rc_priv->single_stream) || - (rate_table->info[rate].valid_single_stream && - ath_rc_priv->single_stream)); - - return rate; -} - -static void ath_rc_rate_set_series(const struct ath_rate_table *rate_table , - struct ath_rc_series *series, - u8 tries, - u8 rix, - int rtsctsenable) -{ - series->tries = tries; - series->flags = (rtsctsenable ? ATH_RC_RTSCTS_FLAG : 0) | - (WLAN_RC_PHY_DS(rate_table->info[rix].phy) ? - ATH_RC_DS_FLAG : 0) | - (WLAN_RC_PHY_40(rate_table->info[rix].phy) ? - ATH_RC_CW40_FLAG : 0) | - (WLAN_RC_PHY_SGI(rate_table->info[rix].phy) ? - ATH_RC_SGI_FLAG : 0); - - series->rix = rate_table->info[rix].base_index; - series->max_4ms_framelen = rate_table->info[rix].max_4ms_framelen; -} - -static u8 ath_rc_rate_getidx(struct ath_softc *sc, - struct ath_rate_node *ath_rc_priv, - const struct ath_rate_table *rate_table, - u8 rix, u16 stepdown, - u16 min_rate) -{ - u32 j; - u8 nextindex; - struct ath_tx_ratectrl *rate_ctrl = - (struct ath_tx_ratectrl *)(ath_rc_priv); - - if (min_rate) { - for (j = RATE_TABLE_SIZE; j > 0; j--) { - if (ath_rc_get_nextlowervalid_txrate(rate_table, - rate_ctrl, rix, &nextindex)) - rix = nextindex; - else - break; - } - } else { - for (j = stepdown; j > 0; j--) { - if (ath_rc_get_nextlowervalid_txrate(rate_table, - rate_ctrl, rix, &nextindex)) - rix = nextindex; - else - break; - } - } - return rix; -} - -static void ath_rc_ratefind(struct ath_softc *sc, - struct ath_rate_node *ath_rc_priv, - int num_tries, int num_rates, unsigned int rcflag, - struct ath_rc_series series[], int *is_probe, - int is_retry) -{ - u8 try_per_rate = 0, i = 0, rix, nrix; - struct ath_rate_softc *asc = (struct ath_rate_softc *)sc->sc_rc; - struct ath_rate_table *rate_table; - - rate_table = - (struct ath_rate_table *)asc->hw_rate_table[sc->sc_curmode]; - rix = ath_rc_ratefind_ht(sc, ath_rc_priv, rate_table, - (rcflag & ATH_RC_PROBE_ALLOWED) ? 1 : 0, - is_probe, is_retry); - nrix = rix; - - if ((rcflag & ATH_RC_PROBE_ALLOWED) && (*is_probe)) { - /* set one try for probe rates. For the - * probes don't enable rts */ - ath_rc_rate_set_series(rate_table, - &series[i++], 1, nrix, FALSE); - - try_per_rate = (num_tries/num_rates); - /* Get the next tried/allowed rate. No RTS for the next series - * after the probe rate - */ - nrix = ath_rc_rate_getidx(sc, - ath_rc_priv, rate_table, nrix, 1, FALSE); - ath_rc_rate_set_series(rate_table, - &series[i++], try_per_rate, nrix, 0); - } else { - try_per_rate = (num_tries/num_rates); - /* Set the choosen rate. No RTS for first series entry. */ - ath_rc_rate_set_series(rate_table, - &series[i++], try_per_rate, nrix, FALSE); - } - - /* Fill in the other rates for multirate retry */ - for ( ; i < num_rates; i++) { - u8 try_num; - u8 min_rate; - - try_num = ((i + 1) == num_rates) ? - num_tries - (try_per_rate * i) : try_per_rate ; - min_rate = (((i + 1) == num_rates) && - (rcflag & ATH_RC_MINRATE_LASTRATE)) ? 1 : 0; - - nrix = ath_rc_rate_getidx(sc, ath_rc_priv, - rate_table, nrix, 1, min_rate); - /* All other rates in the series have RTS enabled */ - ath_rc_rate_set_series(rate_table, - &series[i], try_num, nrix, TRUE); - } - - /* - * 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->sc_curmode == WIRELESS_MODE_11NG_HT20) || - (sc->sc_curmode == WIRELESS_MODE_11NG_HT40PLUS) || - (sc->sc_curmode == WIRELESS_MODE_11NG_HT40MINUS)) { - 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))) { - series[3].rix = series[2].rix; - series[3].flags = series[2].flags; - series[3].max_4ms_framelen = series[2].max_4ms_framelen; - } - } -} - -/* - * Return the Tx rate series. - */ -void ath_rate_findrate(struct ath_softc *sc, - struct ath_rate_node *ath_rc_priv, - int num_tries, - int num_rates, - unsigned int rcflag, - struct ath_rc_series series[], - int *is_probe, - int is_retry) -{ - struct ath_vap *avp = ath_rc_priv->avp; - - DPRINTF(sc, ATH_DBG_RATE, "%s", __func__); - if (!num_rates || !num_tries) - return; - - if (avp->av_config.av_fixed_rateset == IEEE80211_FIXED_RATE_NONE) { - ath_rc_ratefind(sc, ath_rc_priv, num_tries, num_rates, - rcflag, series, is_probe, is_retry); - } else { - /* Fixed rate */ - int idx; - u8 flags; - u32 rix; - struct ath_rate_softc *asc = ath_rc_priv->asc; - struct ath_rate_table *rate_table; - - rate_table = (struct ath_rate_table *) - asc->hw_rate_table[sc->sc_curmode]; - - for (idx = 0; idx < 4; idx++) { - unsigned int mcs; - u8 series_rix = 0; - - series[idx].tries = - IEEE80211_RATE_IDX_ENTRY( - avp->av_config.av_fixed_retryset, idx); - - mcs = IEEE80211_RATE_IDX_ENTRY( - avp->av_config.av_fixed_rateset, idx); - - if (idx == 3 && (mcs & 0xf0) == 0x70) - mcs = (mcs & ~0xf0)|0x80; - - if (!(mcs & 0x80)) - flags = 0; - else - flags = ((ath_rc_priv->ht_cap & - WLAN_RC_DS_FLAG) ? - ATH_RC_DS_FLAG : 0) | - ((ath_rc_priv->ht_cap & - WLAN_RC_40_FLAG) ? - ATH_RC_CW40_FLAG : 0) | - ((ath_rc_priv->ht_cap & - WLAN_RC_SGI_FLAG) ? - ((ath_rc_priv->ht_cap & - WLAN_RC_40_FLAG) ? - ATH_RC_SGI_FLAG : 0) : 0); - - series[idx].rix = sc->sc_rixmap[mcs]; - series_rix = series[idx].rix; - - /* XXX: Give me some cleanup love */ - if ((flags & ATH_RC_CW40_FLAG) && - (flags & ATH_RC_SGI_FLAG)) - rix = rate_table->info[series_rix].ht_index; - else if (flags & ATH_RC_SGI_FLAG) - rix = rate_table->info[series_rix].sgi_index; - else if (flags & ATH_RC_CW40_FLAG) - rix = rate_table->info[series_rix].cw40index; - else - rix = rate_table->info[series_rix].base_index; - series[idx].max_4ms_framelen = - rate_table->info[rix].max_4ms_framelen; - series[idx].flags = flags; - } - } -} - -static void ath_rc_update_ht(struct ath_softc *sc, - struct ath_rate_node *ath_rc_priv, - struct ath_tx_info_priv *info_priv, - int tx_rate, int xretries, int retries) -{ - struct ath_tx_ratectrl *rate_ctrl; - u32 now_msec = jiffies_to_msecs(jiffies); - int state_change = FALSE, rate, count; - u8 last_per; - struct ath_rate_softc *asc = (struct ath_rate_softc *)sc->sc_rc; - struct ath_rate_table *rate_table = - (struct ath_rate_table *)asc->hw_rate_table[sc->sc_curmode]; - - static 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 - }; - - if (!ath_rc_priv) - return; - - rate_ctrl = (struct ath_tx_ratectrl *)(ath_rc_priv); - - ASSERT(tx_rate >= 0); - if (tx_rate < 0) - return; - - /* To compensate for some imbalance between ctrl and ext. channel */ - - if (WLAN_RC_PHY_40(rate_table->info[tx_rate].phy)) - info_priv->tx.ts_rssi = - info_priv->tx.ts_rssi < 3 ? 0 : - info_priv->tx.ts_rssi - 3; - - last_per = rate_ctrl->state[tx_rate].per; - - if (xretries) { - /* Update the PER. */ - if (xretries == 1) { - rate_ctrl->state[tx_rate].per += 30; - if (rate_ctrl->state[tx_rate].per > 100) - rate_ctrl->state[tx_rate].per = 100; - } else { - /* xretries == 2 */ - count = sizeof(nretry_to_per_lookup) / - sizeof(nretry_to_per_lookup[0]); - if (retries >= count) - retries = count - 1; - /* new_PER = 7/8*old_PER + 1/8*(currentPER) */ - rate_ctrl->state[tx_rate].per = - (u8)(rate_ctrl->state[tx_rate].per - - (rate_ctrl->state[tx_rate].per >> 3) + - ((100) >> 3)); - } - - /* xretries == 1 or 2 */ - - if (rate_ctrl->probe_rate == tx_rate) - rate_ctrl->probe_rate = 0; - - } else { /* xretries == 0 */ - /* Update the PER. */ - /* Make sure it doesn't index out of array's bounds. */ - count = sizeof(nretry_to_per_lookup) / - sizeof(nretry_to_per_lookup[0]); - if (retries >= count) - retries = count - 1; - if (info_priv->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 (info_priv->n_frames > 0) - rate_ctrl->state[tx_rate].per - = (u8) - (rate_ctrl->state[tx_rate].per - - (rate_ctrl->state[tx_rate].per >> 3) + - ((100*(retries*info_priv->n_frames + - info_priv->n_bad_frames) / - (info_priv->n_frames * - (retries+1))) >> 3)); - } else { - /* new_PER = 7/8*old_PER + 1/8*(currentPER) */ - - rate_ctrl->state[tx_rate].per = (u8) - (rate_ctrl->state[tx_rate].per - - (rate_ctrl->state[tx_rate].per >> 3) + - (nretry_to_per_lookup[retries] >> 3)); - } - - rate_ctrl->rssi_last_prev2 = rate_ctrl->rssi_last_prev; - rate_ctrl->rssi_last_prev = rate_ctrl->rssi_last; - rate_ctrl->rssi_last = info_priv->tx.ts_rssi; - rate_ctrl->rssi_time = now_msec; - - /* - * If we got at most one retry then increase the max rate if - * this was a probe. Otherwise, ignore the probe. - */ - - if (rate_ctrl->probe_rate && rate_ctrl->probe_rate == tx_rate) { - if (retries > 0 || 2 * info_priv->n_bad_frames > - info_priv->n_frames) { - /* - * 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. - */ - rate_ctrl->probe_rate = 0; - } else { - u8 probe_rate = 0; - - rate_ctrl->rate_max_phy = rate_ctrl->probe_rate; - probe_rate = rate_ctrl->probe_rate; - - if (rate_ctrl->state[probe_rate].per > 30) - rate_ctrl->state[probe_rate].per = 20; - - rate_ctrl->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 - * succesful. - */ - rate_ctrl->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. - * - * Later: if rssi_ack is close to - * rate_ctrl->state[txRate].rssi_thres and we see lots - * of retries, then we could increase - * rate_ctrl->state[txRate].rssi_thres. - */ - rate_ctrl->hw_maxretry_pktcnt = 0; - } else { - /* - * It worked with no retries. First ignore bogus (small) - * rssi_ack values. - */ - if (tx_rate == rate_ctrl->rate_max_phy && - rate_ctrl->hw_maxretry_pktcnt < 255) { - rate_ctrl->hw_maxretry_pktcnt++; - } - - if (info_priv->tx.ts_rssi >= - rate_table->info[tx_rate].rssi_ack_validmin) { - /* Average the rssi */ - if (tx_rate != rate_ctrl->rssi_sum_rate) { - rate_ctrl->rssi_sum_rate = tx_rate; - rate_ctrl->rssi_sum = - rate_ctrl->rssi_sum_cnt = 0; - } - - rate_ctrl->rssi_sum += info_priv->tx.ts_rssi; - rate_ctrl->rssi_sum_cnt++; - - if (rate_ctrl->rssi_sum_cnt > 4) { - int32_t rssi_ackAvg = - (rate_ctrl->rssi_sum + 2) / 4; - int8_t rssi_thres = - rate_ctrl->state[tx_rate]. - rssi_thres; - int8_t rssi_ack_vmin = - rate_table->info[tx_rate]. - rssi_ack_validmin; - - rate_ctrl->rssi_sum = - rate_ctrl->rssi_sum_cnt = 0; - - /* Now reduce the current - * rssi threshold. */ - if ((rssi_ackAvg < rssi_thres + 2) && - (rssi_thres > rssi_ack_vmin)) { - rate_ctrl->state[tx_rate]. - rssi_thres--; - } - - state_change = TRUE; - } - } - } - } - - /* For all cases */ - - /* - * If this rate looks bad (high PER) then stop using it for - * a while (except if we are probing). - */ - if (rate_ctrl->state[tx_rate].per >= 55 && tx_rate > 0 && - rate_table->info[tx_rate].ratekbps <= - rate_table->info[rate_ctrl->rate_max_phy].ratekbps) { - ath_rc_get_nextlowervalid_txrate(rate_table, rate_ctrl, - (u8) tx_rate, &rate_ctrl->rate_max_phy); - - /* Don't probe for a little while. */ - rate_ctrl->probe_time = now_msec; - } - - if (state_change) { - /* - * Make sure the rates above this have higher rssi thresholds. - * (Note: Monotonicity is kept within the OFDM rates and - * within the CCK rates. However, no adjustment is - * made to keep the rssi thresholds monotonically - * increasing between the CCK and OFDM rates.) - */ - for (rate = tx_rate; rate < - rate_ctrl->rate_table_size - 1; rate++) { - if (rate_table->info[rate+1].phy != - rate_table->info[tx_rate].phy) - break; - - if (rate_ctrl->state[rate].rssi_thres + - rate_table->info[rate].rssi_ack_deltamin > - rate_ctrl->state[rate+1].rssi_thres) { - rate_ctrl->state[rate+1].rssi_thres = - rate_ctrl->state[rate]. - rssi_thres + - rate_table->info[rate]. - rssi_ack_deltamin; - } - } - - /* Make sure the rates below this have lower rssi thresholds. */ - for (rate = tx_rate - 1; rate >= 0; rate--) { - if (rate_table->info[rate].phy != - rate_table->info[tx_rate].phy) - break; - - if (rate_ctrl->state[rate].rssi_thres + - rate_table->info[rate].rssi_ack_deltamin > - rate_ctrl->state[rate+1].rssi_thres) { - if (rate_ctrl->state[rate+1].rssi_thres < - rate_table->info[rate]. - rssi_ack_deltamin) - rate_ctrl->state[rate].rssi_thres = 0; - else { - rate_ctrl->state[rate].rssi_thres = - rate_ctrl->state[rate+1]. - rssi_thres - - rate_table->info[rate]. - rssi_ack_deltamin; - } - - if (rate_ctrl->state[rate].rssi_thres < - rate_table->info[rate]. - rssi_ack_validmin) { - rate_ctrl->state[rate].rssi_thres = - rate_table->info[rate]. - rssi_ack_validmin; - } - } - } - } - - /* Make sure the rates below this have lower PER */ - /* Monotonicity is kept only for rates below the current rate. */ - if (rate_ctrl->state[tx_rate].per < last_per) { - for (rate = tx_rate - 1; rate >= 0; rate--) { - if (rate_table->info[rate].phy != - rate_table->info[tx_rate].phy) - break; - - if (rate_ctrl->state[rate].per > - rate_ctrl->state[rate+1].per) { - rate_ctrl->state[rate].per = - rate_ctrl->state[rate+1].per; - } - } - } - - /* Maintain monotonicity for rates above the current rate */ - for (rate = tx_rate; rate < rate_ctrl->rate_table_size - 1; rate++) { - if (rate_ctrl->state[rate+1].per < rate_ctrl->state[rate].per) - rate_ctrl->state[rate+1].per = - rate_ctrl->state[rate].per; - } - - /* Every so often, we reduce the thresholds and - * PER (different for CCK and OFDM). */ - if (now_msec - rate_ctrl->rssi_down_time >= - rate_table->rssi_reduce_interval) { - - for (rate = 0; rate < rate_ctrl->rate_table_size; rate++) { - if (rate_ctrl->state[rate].rssi_thres > - rate_table->info[rate].rssi_ack_validmin) - rate_ctrl->state[rate].rssi_thres -= 1; - } - rate_ctrl->rssi_down_time = now_msec; - } - - /* Every so often, we reduce the thresholds - * and PER (different for CCK and OFDM). */ - if (now_msec - rate_ctrl->per_down_time >= - rate_table->rssi_reduce_interval) { - for (rate = 0; rate < rate_ctrl->rate_table_size; rate++) { - rate_ctrl->state[rate].per = - 7 * rate_ctrl->state[rate].per / 8; - } - - rate_ctrl->per_down_time = now_msec; - } -} - -/* - * This routine is called in rate control callback tx_status() to give - * the status of previous frames. - */ -static void ath_rc_update(struct ath_softc *sc, - struct ath_rate_node *ath_rc_priv, - struct ath_tx_info_priv *info_priv, int final_ts_idx, - int xretries, int long_retry) -{ - struct ath_rate_softc *asc = (struct ath_rate_softc *)sc->sc_rc; - struct ath_rate_table *rate_table; - struct ath_tx_ratectrl *rate_ctrl; - struct ath_rc_series rcs[4]; - u8 flags; - u32 series = 0, rix; - - memcpy(rcs, info_priv->rcs, 4 * sizeof(rcs[0])); - rate_table = (struct ath_rate_table *) - asc->hw_rate_table[sc->sc_curmode]; - rate_ctrl = (struct ath_tx_ratectrl *)(ath_rc_priv); - ASSERT(rcs[0].tries != 0); - - /* - * If the first rate is not the final index, there - * are intermediate rate failures to be processed. - */ - if (final_ts_idx != 0) { - /* Process intermediate rates that failed.*/ - for (series = 0; series < final_ts_idx ; series++) { - if (rcs[series].tries != 0) { - flags = rcs[series].flags; - /* If HT40 and we have switched mode from - * 40 to 20 => don't update */ - if ((flags & ATH_RC_CW40_FLAG) && - (rate_ctrl->rc_phy_mode != - (flags & ATH_RC_CW40_FLAG))) - return; - if ((flags & ATH_RC_CW40_FLAG) && - (flags & ATH_RC_SGI_FLAG)) - rix = rate_table->info[ - rcs[series].rix].ht_index; - else if (flags & ATH_RC_SGI_FLAG) - rix = rate_table->info[ - rcs[series].rix].sgi_index; - else if (flags & ATH_RC_CW40_FLAG) - rix = rate_table->info[ - rcs[series].rix].cw40index; - else - rix = rate_table->info[ - rcs[series].rix].base_index; - ath_rc_update_ht(sc, ath_rc_priv, - info_priv, rix, - xretries ? 1 : 2, - rcs[series].tries); - } - } - } else { - /* - * Handle the special case of MIMO PS burst, where the second - * aggregate is sent out with only one rate and one try. - * Treating it as an excessive retry penalizes the rate - * inordinately. - */ - if (rcs[0].tries == 1 && xretries == 1) - xretries = 2; - } - - flags = rcs[series].flags; - /* If HT40 and we have switched mode from 40 to 20 => don't update */ - if ((flags & ATH_RC_CW40_FLAG) && - (rate_ctrl->rc_phy_mode != (flags & ATH_RC_CW40_FLAG))) - return; - - if ((flags & ATH_RC_CW40_FLAG) && (flags & ATH_RC_SGI_FLAG)) - rix = rate_table->info[rcs[series].rix].ht_index; - else if (flags & ATH_RC_SGI_FLAG) - rix = rate_table->info[rcs[series].rix].sgi_index; - else if (flags & ATH_RC_CW40_FLAG) - rix = rate_table->info[rcs[series].rix].cw40index; - else - rix = rate_table->info[rcs[series].rix].base_index; - - ath_rc_update_ht(sc, ath_rc_priv, info_priv, rix, - xretries, long_retry); -} - - -/* - * Process a tx descriptor for a completed transmit (success or failure). - */ -static void ath_rate_tx_complete(struct ath_softc *sc, - struct ath_node *an, - struct ath_rate_node *rc_priv, - struct ath_tx_info_priv *info_priv) -{ - int final_ts_idx = info_priv->tx.ts_rateindex; - int tx_status = 0, is_underrun = 0; - struct ath_vap *avp; - - avp = rc_priv->avp; - if ((avp->av_config.av_fixed_rateset != IEEE80211_FIXED_RATE_NONE) - || info_priv->tx.ts_status & ATH9K_TXERR_FILT) - return; - - if (info_priv->tx.ts_rssi > 0) { - ATH_RSSI_LPF(an->an_chainmask_sel.tx_avgrssi, - info_priv->tx.ts_rssi); - } - - /* - * If underrun error is seen assume it as an excessive retry only - * if prefetch trigger level have reached the max (0x3f for 5416) - * Adjust the long retry as if the frame was tried ATH_11N_TXMAXTRY - * times. This affects how ratectrl updates PER for the failed rate. - */ - if (info_priv->tx.ts_flags & - (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN) && - ((sc->sc_ah->ah_txTrigLevel) >= tx_triglevel_max)) { - tx_status = 1; - is_underrun = 1; - } - - if ((info_priv->tx.ts_status & ATH9K_TXERR_XRETRY) || - (info_priv->tx.ts_status & ATH9K_TXERR_FIFO)) - tx_status = 1; - - ath_rc_update(sc, rc_priv, info_priv, final_ts_idx, tx_status, - (is_underrun) ? ATH_11N_TXMAXTRY : - info_priv->tx.ts_longretry); -} - - -/* - * Update the SIB's rate control information - * - * This should be called when the supported rates change - * (e.g. SME operation, wireless mode change) - * - * It will determine which rates are valid for use. - */ -static void ath_rc_sib_update(struct ath_softc *sc, - struct ath_rate_node *ath_rc_priv, - u32 capflag, int keep_state, - struct ath_rateset *negotiated_rates, - struct ath_rateset *negotiated_htrates) -{ - struct ath_rate_table *rate_table = NULL; - struct ath_rate_softc *asc = (struct ath_rate_softc *)sc->sc_rc; - struct ath_rateset *rateset = negotiated_rates; - u8 *ht_mcs = (u8 *)negotiated_htrates; - struct ath_tx_ratectrl *rate_ctrl = (struct ath_tx_ratectrl *) - (ath_rc_priv); - u8 i, j, k, hi = 0, hthi = 0; - - rate_table = (struct ath_rate_table *) - asc->hw_rate_table[sc->sc_curmode]; - - /* Initial rate table size. Will change depending - * on the working rate set */ - rate_ctrl->rate_table_size = MAX_TX_RATE_TBL; - - /* Initialize thresholds according to the global rate table */ - for (i = 0 ; (i < rate_ctrl->rate_table_size) && (!keep_state); i++) { - rate_ctrl->state[i].rssi_thres = - rate_table->info[i].rssi_ack_validmin; - rate_ctrl->state[i].per = 0; - } - - /* Determine the valid rates */ - ath_rc_init_valid_txmask(rate_ctrl); - - for (i = 0; i < WLAN_RC_PHY_MAX; i++) { - for (j = 0; j < MAX_TX_RATE_PHY; j++) - rate_ctrl->valid_phy_rateidx[i][j] = 0; - rate_ctrl->valid_phy_ratecnt[i] = 0; - } - rate_ctrl->rc_phy_mode = (capflag & WLAN_RC_40_FLAG); - - /* Set stream capability */ - ath_rc_priv->single_stream = (capflag & WLAN_RC_DS_FLAG) ? 0 : 1; - - if (!rateset->rs_nrates) { - /* No working rate, just initialize valid rates */ - hi = ath_rc_sib_init_validrates(ath_rc_priv, rate_table, - capflag); - } else { - /* Use intersection of working rates and valid rates */ - hi = ath_rc_sib_setvalid_rates(ath_rc_priv, rate_table, - rateset, capflag); - if (capflag & WLAN_RC_HT_FLAG) { - hthi = ath_rc_sib_setvalid_htrates(ath_rc_priv, - rate_table, - ht_mcs, - capflag); - } - hi = A_MAX(hi, hthi); - } - - rate_ctrl->rate_table_size = hi + 1; - rate_ctrl->rate_max_phy = 0; - ASSERT(rate_ctrl->rate_table_size <= MAX_TX_RATE_TBL); - - for (i = 0, k = 0; i < WLAN_RC_PHY_MAX; i++) { - for (j = 0; j < rate_ctrl->valid_phy_ratecnt[i]; j++) { - rate_ctrl->valid_rate_index[k++] = - rate_ctrl->valid_phy_rateidx[i][j]; - } - - if (!ath_rc_valid_phyrate(i, rate_table->initial_ratemax, TRUE) - || !rate_ctrl->valid_phy_ratecnt[i]) - continue; - - rate_ctrl->rate_max_phy = rate_ctrl->valid_phy_rateidx[i][j-1]; - } - ASSERT(rate_ctrl->rate_table_size <= MAX_TX_RATE_TBL); - ASSERT(k <= MAX_TX_RATE_TBL); - - rate_ctrl->max_valid_rate = k; - /* - * Some third party vendors don't send the supported rate series in - * order. So sorting to make sure its in order, otherwise our RateFind - * Algo will select wrong rates - */ - ath_rc_sort_validrates(rate_table, rate_ctrl); - rate_ctrl->rate_max_phy = rate_ctrl->valid_rate_index[k-4]; -} - -/* - * Update rate-control state on station associate/reassociate. - */ -static int ath_rate_newassoc(struct ath_softc *sc, - struct ath_rate_node *ath_rc_priv, - unsigned int capflag, - struct ath_rateset *negotiated_rates, - struct ath_rateset *negotiated_htrates) -{ - - - ath_rc_priv->ht_cap = - ((capflag & ATH_RC_DS_FLAG) ? WLAN_RC_DS_FLAG : 0) | - ((capflag & ATH_RC_SGI_FLAG) ? WLAN_RC_SGI_FLAG : 0) | - ((capflag & ATH_RC_HT_FLAG) ? WLAN_RC_HT_FLAG : 0) | - ((capflag & ATH_RC_CW40_FLAG) ? WLAN_RC_40_FLAG : 0); - - ath_rc_sib_update(sc, ath_rc_priv, ath_rc_priv->ht_cap, 0, - negotiated_rates, negotiated_htrates); - - return 0; -} - -/* - * This routine is called to initialize the rate control parameters - * in the SIB. It is called initially during system initialization - * or when a station is associated with the AP. - */ -static void ath_rc_sib_init(struct ath_rate_node *ath_rc_priv) -{ - struct ath_tx_ratectrl *rate_ctrl; - - rate_ctrl = (struct ath_tx_ratectrl *)(ath_rc_priv); - rate_ctrl->rssi_down_time = jiffies_to_msecs(jiffies); -} - - -static void ath_setup_rates(struct ieee80211_local *local, struct sta_info *sta) - -{ - struct ieee80211_supported_band *sband; - struct ieee80211_hw *hw = local_to_hw(local); - struct ath_softc *sc = hw->priv; - struct ath_rate_node *rc_priv = sta->rate_ctrl_priv; - int i, j = 0; - - DPRINTF(sc, ATH_DBG_RATE, "%s", __func__); - sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; - for (i = 0; i < sband->n_bitrates; i++) { - if (sta->supp_rates[local->hw.conf.channel->band] & BIT(i)) { - rc_priv->neg_rates.rs_rates[j] - = (sband->bitrates[i].bitrate * 2) / 10; - j++; - } - } - rc_priv->neg_rates.rs_nrates = j; -} - -void ath_rc_node_update(struct ieee80211_hw *hw, struct ath_rate_node *rc_priv) -{ - struct ath_softc *sc = hw->priv; - u32 capflag = 0; - - if (hw->conf.ht_conf.ht_supported) { - capflag |= ATH_RC_HT_FLAG | ATH_RC_DS_FLAG; - if (sc->sc_ht_info.tx_chan_width == ATH9K_HT_MACMODE_2040) - capflag |= ATH_RC_CW40_FLAG; - } - - ath_rate_newassoc(sc, rc_priv, capflag, - &rc_priv->neg_rates, - &rc_priv->neg_ht_rates); - -} - -/* Rate Control callbacks */ -static void ath_tx_status(void *priv, struct net_device *dev, - struct sk_buff *skb) -{ - struct ath_softc *sc = priv; - struct ath_tx_info_priv *tx_info_priv; - struct ath_node *an; - struct sta_info *sta; - struct ieee80211_local *local; - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - struct ieee80211_hdr *hdr; - __le16 fc; - - local = hw_to_local(sc->hw); - hdr = (struct ieee80211_hdr *)skb->data; - fc = hdr->frame_control; - tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0]; - - spin_lock_bh(&sc->node_lock); - an = ath_node_find(sc, hdr->addr1); - spin_unlock_bh(&sc->node_lock); - - sta = sta_info_get(local, hdr->addr1); - if (!an || !sta || !ieee80211_is_data(fc)) { - if (tx_info->driver_data[0] != NULL) { - kfree(tx_info->driver_data[0]); - tx_info->driver_data[0] = NULL; - } - return; - } - if (tx_info->driver_data[0] != NULL) { - ath_rate_tx_complete(sc, an, sta->rate_ctrl_priv, tx_info_priv); - kfree(tx_info->driver_data[0]); - tx_info->driver_data[0] = NULL; - } -} - -static void ath_tx_aggr_resp(struct ath_softc *sc, - struct sta_info *sta, - struct ath_node *an, - u8 tidno) -{ - struct ieee80211_hw *hw = sc->hw; - struct ieee80211_local *local; - struct ath_atx_tid *txtid; - struct ieee80211_supported_band *sband; - u16 buffersize = 0; - int state; - DECLARE_MAC_BUF(mac); - - if (!sc->sc_txaggr) - return; - - txtid = ATH_AN_2_TID(an, tidno); - if (!txtid->paused) - return; - - local = hw_to_local(sc->hw); - sband = hw->wiphy->bands[hw->conf.channel->band]; - buffersize = IEEE80211_MIN_AMPDU_BUF << - sband->ht_info.ampdu_factor; /* FIXME */ - state = sta->ampdu_mlme.tid_state_tx[tidno]; - - if (state & HT_ADDBA_RECEIVED_MSK) { - txtid->addba_exchangecomplete = 1; - txtid->addba_exchangeinprogress = 0; - txtid->baw_size = buffersize; - - DPRINTF(sc, ATH_DBG_AGGR, - "%s: Resuming tid, buffersize: %d\n", - __func__, - buffersize); - - ath_tx_resume_tid(sc, txtid); - } -} - -static void ath_get_rate(void *priv, struct net_device *dev, - struct ieee80211_supported_band *sband, - struct sk_buff *skb, - struct rate_selection *sel) -{ - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; - struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); - struct sta_info *sta; - struct ath_softc *sc = (struct ath_softc *)priv; - struct ieee80211_hw *hw = sc->hw; - struct ath_tx_info_priv *tx_info_priv; - struct ath_rate_node *ath_rc_priv; - struct ath_node *an; - struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); - int is_probe, chk, ret; - s8 lowest_idx; - __le16 fc = hdr->frame_control; - u8 *qc, tid; - DECLARE_MAC_BUF(mac); - - DPRINTF(sc, ATH_DBG_RATE, "%s\n", __func__); - - /* allocate driver private area of tx_info */ - tx_info->driver_data[0] = kzalloc(sizeof(*tx_info_priv), GFP_ATOMIC); - ASSERT(tx_info->driver_data[0] != NULL); - tx_info_priv = (struct ath_tx_info_priv *)tx_info->driver_data[0]; - - sta = sta_info_get(local, hdr->addr1); - lowest_idx = rate_lowest_index(local, sband, sta); - tx_info_priv->min_rate = (sband->bitrates[lowest_idx].bitrate * 2) / 10; - /* lowest rate for management and multicast/broadcast frames */ - if (!ieee80211_is_data(fc) || - is_multicast_ether_addr(hdr->addr1) || !sta) { - sel->rate_idx = lowest_idx; - return; - } - - ath_rc_priv = sta->rate_ctrl_priv; - - /* Find tx rate for unicast frames */ - ath_rate_findrate(sc, ath_rc_priv, - ATH_11N_TXMAXTRY, 4, - ATH_RC_PROBE_ALLOWED, - tx_info_priv->rcs, - &is_probe, - false); - if (is_probe) - sel->probe_idx = ((struct ath_tx_ratectrl *) - sta->rate_ctrl_priv)->probe_rate; - - /* Ratecontrol sometimes returns invalid rate index */ - if (tx_info_priv->rcs[0].rix != 0xff) - ath_rc_priv->prev_data_rix = tx_info_priv->rcs[0].rix; - else - tx_info_priv->rcs[0].rix = ath_rc_priv->prev_data_rix; - - sel->rate_idx = tx_info_priv->rcs[0].rix; - - /* Check if aggregation has to be enabled for this tid */ - - if (hw->conf.ht_conf.ht_supported) { - if (ieee80211_is_data_qos(fc)) { - qc = ieee80211_get_qos_ctl(hdr); - tid = qc[0] & 0xf; - - spin_lock_bh(&sc->node_lock); - an = ath_node_find(sc, hdr->addr1); - spin_unlock_bh(&sc->node_lock); - - if (!an) { - DPRINTF(sc, ATH_DBG_AGGR, - "%s: Node not found to " - "init/chk TX aggr\n", __func__); - return; - } - - chk = ath_tx_aggr_check(sc, an, tid); - if (chk == AGGR_REQUIRED) { - ret = ieee80211_start_tx_ba_session(hw, - hdr->addr1, tid); - if (ret) - DPRINTF(sc, ATH_DBG_AGGR, - "%s: Unable to start tx " - "aggr for: %s\n", - __func__, - print_mac(mac, hdr->addr1)); - else - DPRINTF(sc, ATH_DBG_AGGR, - "%s: Started tx aggr for: %s\n", - __func__, - print_mac(mac, hdr->addr1)); - } else if (chk == AGGR_EXCHANGE_PROGRESS) - ath_tx_aggr_resp(sc, sta, an, tid); - } - } -} - -static void ath_rate_init(void *priv, void *priv_sta, - struct ieee80211_local *local, - struct sta_info *sta) -{ - struct ieee80211_supported_band *sband; - struct ieee80211_hw *hw = local_to_hw(local); - struct ieee80211_conf *conf = &local->hw.conf; - struct ath_softc *sc = hw->priv; - int i, j = 0; - - DPRINTF(sc, ATH_DBG_RATE, "%s\n", __func__); - - sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; - sta->txrate_idx = rate_lowest_index(local, sband, sta); - - ath_setup_rates(local, sta); - if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) { - for (i = 0; i < MCS_SET_SIZE; i++) { - if (conf->ht_conf.supp_mcs_set[i/8] & (1<<(i%8))) - ((struct ath_rate_node *) - priv_sta)->neg_ht_rates.rs_rates[j++] = i; - if (j == ATH_RATE_MAX) - break; - } - ((struct ath_rate_node *)priv_sta)->neg_ht_rates.rs_nrates = j; - } - ath_rc_node_update(hw, priv_sta); -} - -static void ath_rate_clear(void *priv) -{ - return; -} - -static void *ath_rate_alloc(struct ieee80211_local *local) -{ - struct ieee80211_hw *hw = local_to_hw(local); - struct ath_softc *sc = hw->priv; - - DPRINTF(sc, ATH_DBG_RATE, "%s", __func__); - return local->hw.priv; -} - -static void ath_rate_free(void *priv) -{ - return; -} - -static void *ath_rate_alloc_sta(void *priv, gfp_t gfp) -{ - struct ath_softc *sc = priv; - struct ath_vap *avp = sc->sc_vaps[0]; - struct ath_rate_node *rate_priv; - - DPRINTF(sc, ATH_DBG_RATE, "%s", __func__); - rate_priv = ath_rate_node_alloc(avp, sc->sc_rc, gfp); - if (!rate_priv) { - DPRINTF(sc, ATH_DBG_FATAL, "%s:Unable to allocate" - "private rate control structure", __func__); - return NULL; - } - ath_rc_sib_init(rate_priv); - return rate_priv; -} - -static void ath_rate_free_sta(void *priv, void *priv_sta) -{ - struct ath_rate_node *rate_priv = priv_sta; - struct ath_softc *sc = priv; - - DPRINTF(sc, ATH_DBG_RATE, "%s", __func__); - ath_rate_node_free(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, - .clear = ath_rate_clear, - .alloc = ath_rate_alloc, - .free = ath_rate_free, - .alloc_sta = ath_rate_alloc_sta, - .free_sta = ath_rate_free_sta -}; - -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); -} - |