diff options
author | Luis R. Rodriguez <lrodriguez@atheros.com> | 2009-03-30 22:30:33 -0400 |
---|---|---|
committer | John W. Linville <linville@tuxdriver.com> | 2009-04-22 16:54:38 -0400 |
commit | 203c4805e91786f9a010bc7945a0fde70c9da28e (patch) | |
tree | 00415276b2fe65713f066ffe07b11ad2d8b6bea8 /drivers/net/wireless/ath/ath9k/rc.c | |
parent | 1878f77e13b9d720b78c4f818b94bfd4a7f596e5 (diff) | |
download | op-kernel-dev-203c4805e91786f9a010bc7945a0fde70c9da28e.zip op-kernel-dev-203c4805e91786f9a010bc7945a0fde70c9da28e.tar.gz |
atheros: put atheros wireless drivers into ath/
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/rc.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/rc.c | 1752 |
1 files changed, 1752 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c new file mode 100644 index 0000000..a13668b --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/rc.c @@ -0,0 +1,1752 @@ +/* + * Copyright (c) 2004 Video54 Technologies, Inc. + * Copyright (c) 2004-2009 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. + */ + +#include "ath9k.h" + +static struct ath_rate_table ar5416_11na_ratetable = { + 42, + { + { VALID, VALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ + 5400, 0x0b, 0x00, 12, + 0, 2, 1, 0, 0, 0, 0, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ + 7800, 0x0f, 0x00, 18, + 0, 3, 1, 1, 1, 1, 1, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ + 10000, 0x0a, 0x00, 24, + 2, 4, 2, 2, 2, 2, 2, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ + 13900, 0x0e, 0x00, 36, + 2, 6, 2, 3, 3, 3, 3, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ + 17300, 0x09, 0x00, 48, + 4, 10, 3, 4, 4, 4, 4, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ + 23000, 0x0d, 0x00, 72, + 4, 14, 3, 5, 5, 5, 5, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ + 27400, 0x08, 0x00, 96, + 4, 20, 3, 6, 6, 6, 6, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ + 29300, 0x0c, 0x00, 108, + 4, 23, 3, 7, 7, 7, 7, 0 }, + { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */ + 6400, 0x80, 0x00, 0, + 0, 2, 3, 8, 24, 8, 24, 3216 }, + { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */ + 12700, 0x81, 0x00, 1, + 2, 4, 3, 9, 25, 9, 25, 6434 }, + { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */ + 18800, 0x82, 0x00, 2, + 2, 6, 3, 10, 26, 10, 26, 9650 }, + { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */ + 25000, 0x83, 0x00, 3, + 4, 10, 3, 11, 27, 11, 27, 12868 }, + { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */ + 36700, 0x84, 0x00, 4, + 4, 14, 3, 12, 28, 12, 28, 19304 }, + { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */ + 48100, 0x85, 0x00, 5, + 4, 20, 3, 13, 29, 13, 29, 25740 }, + { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */ + 53500, 0x86, 0x00, 6, + 4, 23, 3, 14, 30, 14, 30, 28956 }, + { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */ + 59000, 0x87, 0x00, 7, + 4, 25, 3, 15, 31, 15, 32, 32180 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */ + 12700, 0x88, 0x00, + 8, 0, 2, 3, 16, 33, 16, 33, 6430 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */ + 24800, 0x89, 0x00, 9, + 2, 4, 3, 17, 34, 17, 34, 12860 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */ + 36600, 0x8a, 0x00, 10, + 2, 6, 3, 18, 35, 18, 35, 19300 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */ + 48100, 0x8b, 0x00, 11, + 4, 10, 3, 19, 36, 19, 36, 25736 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */ + 69500, 0x8c, 0x00, 12, + 4, 14, 3, 20, 37, 20, 37, 38600 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */ + 89500, 0x8d, 0x00, 13, + 4, 20, 3, 21, 38, 21, 38, 51472 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */ + 98900, 0x8e, 0x00, 14, + 4, 23, 3, 22, 39, 22, 39, 57890 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */ + 108300, 0x8f, 0x00, 15, + 4, 25, 3, 23, 40, 23, 41, 64320 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */ + 13200, 0x80, 0x00, 0, + 0, 2, 3, 8, 24, 24, 24, 6684 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */ + 25900, 0x81, 0x00, 1, + 2, 4, 3, 9, 25, 25, 25, 13368 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */ + 38600, 0x82, 0x00, 2, + 2, 6, 3, 10, 26, 26, 26, 20052 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */ + 49800, 0x83, 0x00, 3, + 4, 10, 3, 11, 27, 27, 27, 26738 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */ + 72200, 0x84, 0x00, 4, + 4, 14, 3, 12, 28, 28, 28, 40104 }, + { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */ + 92900, 0x85, 0x00, 5, + 4, 20, 3, 13, 29, 29, 29, 53476 }, + { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */ + 102700, 0x86, 0x00, 6, + 4, 23, 3, 14, 30, 30, 30, 60156 }, + { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */ + 112000, 0x87, 0x00, 7, + 4, 25, 3, 15, 31, 32, 32, 66840 }, + { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ + 122000, 0x87, 0x00, 7, + 4, 25, 3, 15, 31, 32, 32, 74200 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */ + 25800, 0x88, 0x00, 8, + 0, 2, 3, 16, 33, 33, 33, 13360 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */ + 49800, 0x89, 0x00, 9, + 2, 4, 3, 17, 34, 34, 34, 26720 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */ + 71900, 0x8a, 0x00, 10, + 2, 6, 3, 18, 35, 35, 35, 40080 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */ + 92500, 0x8b, 0x00, 11, + 4, 10, 3, 19, 36, 36, 36, 53440 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */ + 130300, 0x8c, 0x00, 12, + 4, 14, 3, 20, 37, 37, 37, 80160 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */ + 162800, 0x8d, 0x00, 13, + 4, 20, 3, 21, 38, 38, 38, 106880 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */ + 178200, 0x8e, 0x00, 14, + 4, 23, 3, 22, 39, 39, 39, 120240 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */ + 192100, 0x8f, 0x00, 15, + 4, 25, 3, 23, 40, 41, 41, 133600 }, + { VALID_40, INVALID, WLAN_RC_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 */ +}; + +/* 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, + { + { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ + 900, 0x1b, 0x00, 2, + 0, 0, 1, 0, 0, 0, 0, 0 }, + { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ + 1900, 0x1a, 0x04, 4, + 1, 1, 1, 1, 1, 1, 1, 0 }, + { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ + 4900, 0x19, 0x04, 11, + 2, 2, 2, 2, 2, 2, 2, 0 }, + { VALID_ALL, VALID_ALL, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ + 8100, 0x18, 0x04, 22, + 3, 3, 2, 3, 3, 3, 3, 0 }, + { INVALID, INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ + 5400, 0x0b, 0x00, 12, + 4, 2, 1, 4, 4, 4, 4, 0 }, + { INVALID, INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ + 7800, 0x0f, 0x00, 18, + 4, 3, 1, 5, 5, 5, 5, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ + 10100, 0x0a, 0x00, 24, + 6, 4, 1, 6, 6, 6, 6, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ + 14100, 0x0e, 0x00, 36, + 6, 6, 2, 7, 7, 7, 7, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ + 17700, 0x09, 0x00, 48, + 8, 10, 3, 8, 8, 8, 8, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ + 23700, 0x0d, 0x00, 72, + 8, 14, 3, 9, 9, 9, 9, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ + 27400, 0x08, 0x00, 96, + 8, 20, 3, 10, 10, 10, 10, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 54000, /* 54 Mb */ + 30900, 0x0c, 0x00, 108, + 8, 23, 3, 11, 11, 11, 11, 0 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_20_SS, 6500, /* 6.5 Mb */ + 6400, 0x80, 0x00, 0, + 4, 2, 3, 12, 28, 12, 28, 3216 }, + { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 13000, /* 13 Mb */ + 12700, 0x81, 0x00, 1, + 6, 4, 3, 13, 29, 13, 29, 6434 }, + { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 19500, /* 19.5 Mb */ + 18800, 0x82, 0x00, 2, + 6, 6, 3, 14, 30, 14, 30, 9650 }, + { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 26000, /* 26 Mb */ + 25000, 0x83, 0x00, 3, + 8, 10, 3, 15, 31, 15, 31, 12868 }, + { VALID_20, VALID_20, WLAN_RC_PHY_HT_20_SS, 39000, /* 39 Mb */ + 36700, 0x84, 0x00, 4, + 8, 14, 3, 16, 32, 16, 32, 19304 }, + { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 52000, /* 52 Mb */ + 48100, 0x85, 0x00, 5, + 8, 20, 3, 17, 33, 17, 33, 25740 }, + { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 58500, /* 58.5 Mb */ + 53500, 0x86, 0x00, 6, + 8, 23, 3, 18, 34, 18, 34, 28956 }, + { INVALID, VALID_20, WLAN_RC_PHY_HT_20_SS, 65000, /* 65 Mb */ + 59000, 0x87, 0x00, 7, + 8, 25, 3, 19, 35, 19, 36, 32180 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 13000, /* 13 Mb */ + 12700, 0x88, 0x00, 8, + 4, 2, 3, 20, 37, 20, 37, 6430 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 26000, /* 26 Mb */ + 24800, 0x89, 0x00, 9, + 6, 4, 3, 21, 38, 21, 38, 12860 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_20_DS, 39000, /* 39 Mb */ + 36600, 0x8a, 0x00, 10, + 6, 6, 3, 22, 39, 22, 39, 19300 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 52000, /* 52 Mb */ + 48100, 0x8b, 0x00, 11, + 8, 10, 3, 23, 40, 23, 40, 25736 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 78000, /* 78 Mb */ + 69500, 0x8c, 0x00, 12, + 8, 14, 3, 24, 41, 24, 41, 38600 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 104000, /* 104 Mb */ + 89500, 0x8d, 0x00, 13, + 8, 20, 3, 25, 42, 25, 42, 51472 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 117000, /* 117 Mb */ + 98900, 0x8e, 0x00, 14, + 8, 23, 3, 26, 43, 26, 44, 57890 }, + { VALID_20, INVALID, WLAN_RC_PHY_HT_20_DS, 130000, /* 130 Mb */ + 108300, 0x8f, 0x00, 15, + 8, 25, 3, 27, 44, 27, 45, 64320 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 13500, /* 13.5 Mb */ + 13200, 0x80, 0x00, 0, + 8, 2, 3, 12, 28, 28, 28, 6684 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 27500, /* 27.0 Mb */ + 25900, 0x81, 0x00, 1, + 8, 4, 3, 13, 29, 29, 29, 13368 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 40500, /* 40.5 Mb */ + 38600, 0x82, 0x00, 2, + 8, 6, 3, 14, 30, 30, 30, 20052 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 54000, /* 54 Mb */ + 49800, 0x83, 0x00, 3, + 8, 10, 3, 15, 31, 31, 31, 26738 }, + { VALID_40, VALID_40, WLAN_RC_PHY_HT_40_SS, 81500, /* 81 Mb */ + 72200, 0x84, 0x00, 4, + 8, 14, 3, 16, 32, 32, 32, 40104 }, + { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 108000, /* 108 Mb */ + 92900, 0x85, 0x00, 5, + 8, 20, 3, 17, 33, 33, 33, 53476 }, + { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 121500, /* 121.5 Mb */ + 102700, 0x86, 0x00, 6, + 8, 23, 3, 18, 34, 34, 34, 60156 }, + { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS, 135000, /* 135 Mb */ + 112000, 0x87, 0x00, 7, + 8, 23, 3, 19, 35, 36, 36, 66840 }, + { INVALID, VALID_40, WLAN_RC_PHY_HT_40_SS_HGI, 150000, /* 150 Mb */ + 122000, 0x87, 0x00, 7, + 8, 25, 3, 19, 35, 36, 36, 74200 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 27000, /* 27 Mb */ + 25800, 0x88, 0x00, 8, + 8, 2, 3, 20, 37, 37, 37, 13360 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 54000, /* 54 Mb */ + 49800, 0x89, 0x00, 9, + 8, 4, 3, 21, 38, 38, 38, 26720 }, + { INVALID, INVALID, WLAN_RC_PHY_HT_40_DS, 81000, /* 81 Mb */ + 71900, 0x8a, 0x00, 10, + 8, 6, 3, 22, 39, 39, 39, 40080 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 108000, /* 108 Mb */ + 92500, 0x8b, 0x00, 11, + 8, 10, 3, 23, 40, 40, 40, 53440 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 162000, /* 162 Mb */ + 130300, 0x8c, 0x00, 12, + 8, 14, 3, 24, 41, 41, 41, 80160 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 216000, /* 216 Mb */ + 162800, 0x8d, 0x00, 13, + 8, 20, 3, 25, 42, 42, 42, 106880 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 243000, /* 243 Mb */ + 178200, 0x8e, 0x00, 14, + 8, 23, 3, 26, 43, 43, 43, 120240 }, + { VALID_40, INVALID, WLAN_RC_PHY_HT_40_DS, 270000, /* 270 Mb */ + 192100, 0x8f, 0x00, 15, + 8, 23, 3, 27, 44, 45, 45, 133600 }, + { VALID_40, INVALID, WLAN_RC_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, + { + { VALID, VALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ + 5400, 0x0b, 0x00, (0x80|12), + 0, 2, 1, 0, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ + 7800, 0x0f, 0x00, 18, + 0, 3, 1, 1, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ + 10000, 0x0a, 0x00, (0x80|24), + 2, 4, 2, 2, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ + 13900, 0x0e, 0x00, 36, + 2, 6, 2, 3, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ + 17300, 0x09, 0x00, (0x80|48), + 4, 10, 3, 4, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ + 23000, 0x0d, 0x00, 72, + 4, 14, 3, 5, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ + 27400, 0x08, 0x00, 96, + 4, 19, 3, 6, 0 }, + { VALID, VALID, WLAN_RC_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_11g_ratetable = { + 12, + { + { VALID, VALID, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ + 900, 0x1b, 0x00, 2, + 0, 0, 1, 0, 0 }, + { VALID, VALID, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ + 1900, 0x1a, 0x04, 4, + 1, 1, 1, 1, 0 }, + { VALID, VALID, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ + 4900, 0x19, 0x04, 11, + 2, 2, 2, 2, 0 }, + { VALID, VALID, WLAN_RC_PHY_CCK, 11000, /* 11 Mb */ + 8100, 0x18, 0x04, 22, + 3, 3, 2, 3, 0 }, + { INVALID, INVALID, WLAN_RC_PHY_OFDM, 6000, /* 6 Mb */ + 5400, 0x0b, 0x00, 12, + 4, 2, 1, 4, 0 }, + { INVALID, INVALID, WLAN_RC_PHY_OFDM, 9000, /* 9 Mb */ + 7800, 0x0f, 0x00, 18, + 4, 3, 1, 5, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 12000, /* 12 Mb */ + 10000, 0x0a, 0x00, 24, + 6, 4, 1, 6, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 18000, /* 18 Mb */ + 13900, 0x0e, 0x00, 36, + 6, 6, 2, 7, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 24000, /* 24 Mb */ + 17300, 0x09, 0x00, 48, + 8, 10, 3, 8, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 36000, /* 36 Mb */ + 23000, 0x0d, 0x00, 72, + 8, 14, 3, 9, 0 }, + { VALID, VALID, WLAN_RC_PHY_OFDM, 48000, /* 48 Mb */ + 27400, 0x08, 0x00, 96, + 8, 19, 3, 10, 0 }, + { VALID, VALID, WLAN_RC_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, + { + { VALID, VALID, WLAN_RC_PHY_CCK, 1000, /* 1 Mb */ + 900, 0x1b, 0x00, (0x80|2), + 0, 0, 1, 0, 0 }, + { VALID, VALID, WLAN_RC_PHY_CCK, 2000, /* 2 Mb */ + 1800, 0x1a, 0x04, (0x80|4), + 1, 1, 1, 1, 0 }, + { VALID, VALID, WLAN_RC_PHY_CCK, 5500, /* 5.5 Mb */ + 4300, 0x19, 0x04, (0x80|11), + 1, 2, 2, 2, 0 }, + { VALID, VALID, WLAN_RC_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 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(struct ath_rate_table *rate_table, + struct ath_rate_priv *ath_rc_priv) +{ + 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 void ath_rc_init_valid_txmask(struct ath_rate_priv *ath_rc_priv) +{ + u8 i; + + for (i = 0; i < ath_rc_priv->rate_table_size; i++) + ath_rc_priv->valid_rate_index[i] = 0; +} + +static inline void ath_rc_set_valid_txmask(struct ath_rate_priv *ath_rc_priv, + u8 index, int valid_tx_rate) +{ + ASSERT(index <= ath_rc_priv->rate_table_size); + ath_rc_priv->valid_rate_index[index] = valid_tx_rate ? 1 : 0; +} + +static inline int ath_rc_isvalid_txmask(struct ath_rate_priv *ath_rc_priv, + u8 index) +{ + ASSERT(index <= ath_rc_priv->rate_table_size); + return ath_rc_priv->valid_rate_index[index]; +} + +static inline int ath_rc_get_nextvalid_txrate(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_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; + if (!WLAN_RC_PHY_40(phy) && (capflag & WLAN_RC_40_FLAG)) + return 0; + return 1; +} + +static inline int +ath_rc_get_nextlowervalid_txrate(struct ath_rate_table *rate_table, + 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, + struct ath_rate_table *rate_table, + u32 capflag) +{ + u8 i, hi = 0; + u32 valid; + + for (i = 0; i < rate_table->rate_cnt; i++) { + valid = (!(ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG) ? + rate_table->info[i].valid_single_stream : + rate_table->info[i].valid); + if (valid == 1) { + u32 phy = rate_table->info[i].phy; + u8 valid_rate_count = 0; + + 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] = i; + ath_rc_priv->valid_phy_ratecnt[phy] += 1; + ath_rc_set_valid_txmask(ath_rc_priv, i, 1); + hi = A_MAX(hi, i); + } + } + + return hi; +} + +static u8 ath_rc_setvalid_rates(struct ath_rate_priv *ath_rc_priv, + struct ath_rate_table *rate_table, + struct ath_rateset *rateset, + u32 capflag) +{ + u8 i, j, hi = 0; + + /* 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->ht_cap & WLAN_RC_DS_FLAG) ? + rate_table->info[j].valid_single_stream : + rate_table->info[j].valid); + u8 rate = rateset->rs_rates[i]; + u8 dot11rate = rate_table->info[j].dot11rate; + + /* We allow a rate only if its valid and the + * capflag matches one of the validity + * (VALID/VALID_20/VALID_40) flags */ + + if (((rate & 0x7F) == (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, 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_set_valid_txmask(ath_rc_priv, j, 1); + hi = A_MAX(hi, j); + } + } + } + + return hi; +} + +static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv, + struct ath_rate_table *rate_table, + u8 *mcs_set, u32 capflag) +{ + struct ath_rateset *rateset = (struct ath_rateset *)mcs_set; + + u8 i, j, hi = 0; + + /* 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->ht_cap & WLAN_RC_DS_FLAG) ? + rate_table->info[j].valid_single_stream : + rate_table->info[j].valid); + u8 rate = rateset->rs_rates[i]; + u8 dot11rate = rate_table->info[j].dot11rate; + + if (((rate & 0x7F) != (dot11rate & 0x7F)) || + !WLAN_RC_PHY_HT(phy) || + !WLAN_RC_PHY_HT_VALID(valid, capflag)) + continue; + + if (!ath_rc_valid_phyrate(phy, capflag, 0)) + continue; + + ath_rc_priv->valid_phy_rateidx[phy] + [ath_rc_priv->valid_phy_ratecnt[phy]] = j; + ath_rc_priv->valid_phy_ratecnt[phy] += 1; + ath_rc_set_valid_txmask(ath_rc_priv, j, 1); + hi = A_MAX(hi, j); + } + } + + return hi; +} + +static u8 ath_rc_ratefind_ht(struct ath_softc *sc, + struct ath_rate_priv *ath_rc_priv, + struct ath_rate_table *rate_table, + int *is_probing) +{ + 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; + + *is_probing = 0; + + rssi_last = median(ath_rc_priv->rssi_last, + ath_rc_priv->rssi_last_prev, + ath_rc_priv->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 - ath_rc_priv->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 = 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->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; + ath_rc_priv->rssi_last_lookup = rssi_last; + + /* + * 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; + + ASSERT((rate_table->info[rate].valid && + (ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG)) || + (rate_table->info[rate].valid_single_stream && + !(ath_rc_priv->ht_cap & WLAN_RC_DS_FLAG))); + + return rate; +} + +static void ath_rc_rate_set_series(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 = rix; + + if (txrc->short_preamble) + rate->flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE; + if (txrc->rts || rtsctsenable) + rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS; + if (WLAN_RC_PHY_40(rate_table->info[rix].phy)) + 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; + if (WLAN_RC_PHY_HT(rate_table->info[rix].phy)) + rate->flags |= IEEE80211_TX_RC_MCS; +} + +static void ath_rc_rate_set_rtscts(struct ath_softc *sc, + struct ath_rate_table *rate_table, + struct ieee80211_tx_info *tx_info) +{ + struct ieee80211_tx_rate *rates = tx_info->control.rates; + int i = 0, rix = 0, cix, enable_g_protection = 0; + + /* get the cix for the lowest valid rix */ + for (i = 3; i >= 0; i--) { + if (rates[i].count && (rates[i].idx >= 0)) { + rix = rates[i].idx; + break; + } + } + cix = rate_table->info[rix].ctrl_rate; + + /* All protection frames are transmited at 2Mb/s for 802.11g, + * otherwise we transmit them at 1Mb/s */ + if (sc->hw->conf.channel->band == IEEE80211_BAND_2GHZ && + !conf_is_ht(&sc->hw->conf)) + enable_g_protection = 1; + + /* + * If 802.11g protection is enabled, determine whether to use RTS/CTS or + * just CTS. Note that this is only done for OFDM/HT unicast frames. + */ + if ((sc->sc_flags & SC_OP_PROTECT_ENABLE) && + !(tx_info->flags & IEEE80211_TX_CTL_NO_ACK) && + (rate_table->info[rix].phy == WLAN_RC_PHY_OFDM || + WLAN_RC_PHY_HT(rate_table->info[rix].phy))) { + rates[0].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT; + cix = rate_table->info[enable_g_protection].ctrl_rate; + } + + tx_info->control.rts_cts_rate_idx = cix; +} + +static u8 ath_rc_rate_getidx(struct ath_softc *sc, + struct ath_rate_priv *ath_rc_priv, + struct ath_rate_table *rate_table, + u8 rix, u16 stepdown, + u16 min_rate) +{ + u32 j; + u8 nextindex; + + if (min_rate) { + for (j = RATE_TABLE_SIZE; j > 0; j--) { + if (ath_rc_get_nextlowervalid_txrate(rate_table, + ath_rc_priv, rix, &nextindex)) + rix = nextindex; + else + break; + } + } else { + for (j = stepdown; j > 0; j--) { + if (ath_rc_get_nextlowervalid_txrate(rate_table, + ath_rc_priv, rix, &nextindex)) + rix = nextindex; + else + break; + } + } + return rix; +} + +static void ath_rc_ratefind(struct ath_softc *sc, + struct ath_rate_priv *ath_rc_priv, + struct ieee80211_tx_rate_control *txrc) +{ + 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 = 0, i = 0, rix, nrix; + int is_probe = 0; + + rate_table = sc->cur_rate_table; + rix = ath_rc_ratefind_ht(sc, ath_rc_priv, rate_table, &is_probe); + nrix = rix; + + 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, nrix, 0); + + try_per_rate = (ATH_11N_TXMAXTRY/4); + /* 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, 0); + ath_rc_rate_set_series(rate_table, &rates[i++], txrc, + try_per_rate, nrix, 0); + + tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE; + } else { + try_per_rate = (ATH_11N_TXMAXTRY/4); + /* Set the choosen rate. No RTS for first series entry. */ + ath_rc_rate_set_series(rate_table, &rates[i++], txrc, + try_per_rate, nrix, 0); + } + + /* Fill in the other rates for multirate retry */ + for ( ; i < 4; i++) { + u8 try_num; + u8 min_rate; + + try_num = ((i + 1) == 4) ? + ATH_11N_TXMAXTRY - (try_per_rate * i) : try_per_rate ; + min_rate = (((i + 1) == 4) && 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, &rates[i], txrc, + try_num, nrix, 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.channel->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 (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK) && + (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; + } + + /* Setup RTS/CTS */ + ath_rc_rate_set_rtscts(sc, rate_table, tx_info); +} + +static bool ath_rc_update_per(struct ath_softc *sc, + struct ath_rate_table *rate_table, + struct ath_rate_priv *ath_rc_priv, + struct ath_tx_info_priv *tx_info_priv, + int tx_rate, int xretries, int retries, + u32 now_msec) +{ + bool state_change = false; + int count; + u8 last_per; + 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 + }; + + last_per = ath_rc_priv->state[tx_rate].per; + + if (xretries) { + if (xretries == 1) { + ath_rc_priv->state[tx_rate].per += 30; + if (ath_rc_priv->state[tx_rate].per > 100) + ath_rc_priv->state[tx_rate].per = 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->state[tx_rate].per = + (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 (tx_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 (tx_info_priv->n_frames > 0) { + int n_frames, n_bad_frames; + u8 cur_per, new_per; + + n_bad_frames = retries * tx_info_priv->n_frames + + tx_info_priv->n_bad_frames; + n_frames = tx_info_priv->n_frames * (retries + 1); + cur_per = (100 * n_bad_frames / n_frames) >> 3; + new_per = (u8)(last_per - (last_per >> 3) + cur_per); + ath_rc_priv->state[tx_rate].per = new_per; + } + } else { + ath_rc_priv->state[tx_rate].per = + (u8)(last_per - (last_per >> 3) + + (nretry_to_per_lookup[retries] >> 3)); + } + + ath_rc_priv->rssi_last_prev2 = ath_rc_priv->rssi_last_prev; + ath_rc_priv->rssi_last_prev = ath_rc_priv->rssi_last; + ath_rc_priv->rssi_last = tx_info_priv->tx.ts_rssi; + ath_rc_priv->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 (ath_rc_priv->probe_rate && ath_rc_priv->probe_rate == tx_rate) { + if (retries > 0 || 2 * tx_info_priv->n_bad_frames > + tx_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. + */ + 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->state[probe_rate].per > 30) + ath_rc_priv->state[probe_rate].per = 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 + * succesful. + */ + 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. + * + * Later: if rssi_ack is close to + * ath_rc_priv->state[txRate].rssi_thres and we see lots + * of retries, then we could increase + * ath_rc_priv->state[txRate].rssi_thres. + */ + ath_rc_priv->hw_maxretry_pktcnt = 0; + } else { + int32_t rssi_ackAvg; + int8_t rssi_thres; + int8_t rssi_ack_vmin; + + /* + * 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++; + } + + if (tx_info_priv->tx.ts_rssi < + rate_table->info[tx_rate].rssi_ack_validmin) + goto exit; + + /* Average the rssi */ + if (tx_rate != ath_rc_priv->rssi_sum_rate) { + ath_rc_priv->rssi_sum_rate = tx_rate; + ath_rc_priv->rssi_sum = + ath_rc_priv->rssi_sum_cnt = 0; + } + + ath_rc_priv->rssi_sum += tx_info_priv->tx.ts_rssi; + ath_rc_priv->rssi_sum_cnt++; + + if (ath_rc_priv->rssi_sum_cnt < 4) + goto exit; + + rssi_ackAvg = + (ath_rc_priv->rssi_sum + 2) / 4; + rssi_thres = + ath_rc_priv->state[tx_rate].rssi_thres; + rssi_ack_vmin = + rate_table->info[tx_rate].rssi_ack_validmin; + + ath_rc_priv->rssi_sum = + ath_rc_priv->rssi_sum_cnt = 0; + + /* Now reduce the current rssi threshold */ + if ((rssi_ackAvg < rssi_thres + 2) && + (rssi_thres > rssi_ack_vmin)) { + ath_rc_priv->state[tx_rate].rssi_thres--; + } + + state_change = true; + } + } +exit: + return state_change; +} + +/* Update PER, RSSI and whatever else that the code thinks it is doing. + If you can make sense of all this, you really need to go out more. */ + +static void ath_rc_update_ht(struct ath_softc *sc, + struct ath_rate_priv *ath_rc_priv, + struct ath_tx_info_priv *tx_info_priv, + int tx_rate, int xretries, int retries) +{ +#define CHK_RSSI(rate) \ + ((ath_rc_priv->state[(rate)].rssi_thres + \ + rate_table->info[(rate)].rssi_ack_deltamin) > \ + ath_rc_priv->state[(rate)+1].rssi_thres) + + u32 now_msec = jiffies_to_msecs(jiffies); + int rate; + u8 last_per; + bool state_change = false; + struct ath_rate_table *rate_table = sc->cur_rate_table; + int size = ath_rc_priv->rate_table_size; + + if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt)) + return; + + /* To compensate for some imbalance between ctrl and ext. channel */ + + if (WLAN_RC_PHY_40(rate_table->info[tx_rate].phy)) + tx_info_priv->tx.ts_rssi = + tx_info_priv->tx.ts_rssi < 3 ? 0 : + tx_info_priv->tx.ts_rssi - 3; + + last_per = ath_rc_priv->state[tx_rate].per; + + /* Update PER first */ + state_change = ath_rc_update_per(sc, rate_table, ath_rc_priv, + tx_info_priv, 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->state[tx_rate].per >= 55 && tx_rate > 0 && + rate_table->info[tx_rate].ratekbps <= + rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) { + ath_rc_get_nextlowervalid_txrate(rate_table, 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; + } + + 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 < size - 1; rate++) { + if (rate_table->info[rate+1].phy != + rate_table->info[tx_rate].phy) + break; + + if (CHK_RSSI(rate)) { + ath_rc_priv->state[rate+1].rssi_thres = + ath_rc_priv->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 (CHK_RSSI(rate)) { + if (ath_rc_priv->state[rate+1].rssi_thres < + rate_table->info[rate].rssi_ack_deltamin) + ath_rc_priv->state[rate].rssi_thres = 0; + else { + ath_rc_priv->state[rate].rssi_thres = + ath_rc_priv->state[rate+1].rssi_thres - + rate_table->info[rate].rssi_ack_deltamin; + } + + if (ath_rc_priv->state[rate].rssi_thres < + rate_table->info[rate].rssi_ack_validmin) { + ath_rc_priv->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 (ath_rc_priv->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 (ath_rc_priv->state[rate].per > + ath_rc_priv->state[rate+1].per) { + ath_rc_priv->state[rate].per = + ath_rc_priv->state[rate+1].per; + } + } + } + + /* Maintain monotonicity for rates above the current rate */ + for (rate = tx_rate; rate < size - 1; rate++) { + if (ath_rc_priv->state[rate+1].per < + ath_rc_priv->state[rate].per) + ath_rc_priv->state[rate+1].per = + ath_rc_priv->state[rate].per; + } + + /* Every so often, we reduce the thresholds and + * PER (different for CCK and OFDM). */ + if (now_msec - ath_rc_priv->rssi_down_time >= + rate_table->rssi_reduce_interval) { + + for (rate = 0; rate < size; rate++) { + if (ath_rc_priv->state[rate].rssi_thres > + rate_table->info[rate].rssi_ack_validmin) + ath_rc_priv->state[rate].rssi_thres -= 1; + } + ath_rc_priv->rssi_down_time = now_msec; + } + + /* 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->rssi_reduce_interval) { + for (rate = 0; rate < size; rate++) { + ath_rc_priv->state[rate].per = + 7 * ath_rc_priv->state[rate].per / 8; + } + + ath_rc_priv->per_down_time = now_msec; + } + + ath_debug_stat_retries(sc, tx_rate, xretries, retries, + ath_rc_priv->state[tx_rate].per); + +#undef CHK_RSSI +} + +static int ath_rc_get_rateindex(struct ath_rate_table *rate_table, + struct ieee80211_tx_rate *rate) +{ + int rix; + + if ((rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) && + (rate->flags & IEEE80211_TX_RC_SHORT_GI)) + rix = rate_table->info[rate->idx].ht_index; + else if (rate->flags & IEEE80211_TX_RC_SHORT_GI) + rix = rate_table->info[rate->idx].sgi_index; + else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH) + rix = rate_table->info[rate->idx].cw40index; + else + rix = rate_table->info[rate->idx].base_index; + + return rix; +} + +static void ath_rc_tx_status(struct ath_softc *sc, + struct ath_rate_priv *ath_rc_priv, + struct ieee80211_tx_info *tx_info, + int final_ts_idx, int xretries, int long_retry) +{ + struct ath_tx_info_priv *tx_info_priv = ATH_TX_INFO_PRIV(tx_info); + struct ath_rate_table *rate_table; + struct ieee80211_tx_rate *rates = tx_info->status.rates; + u8 flags; + u32 i = 0, rix; + + rate_table = sc->cur_rate_table; + + /* + * 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 (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(rate_table, &rates[i]); + ath_rc_update_ht(sc, ath_rc_priv, + tx_info_priv, rix, + xretries ? 1 : 2, + rates[i].count); + } + } + } 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 (rates[0].count == 1 && xretries == 1) + xretries = 2; + } + + 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(rate_table, &rates[i]); + ath_rc_update_ht(sc, ath_rc_priv, tx_info_priv, rix, + xretries, long_retry); +} + +static struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc, + enum ieee80211_band band, + bool is_ht, bool is_cw_40) +{ + int mode = 0; + + switch(band) { + case IEEE80211_BAND_2GHZ: + mode = ATH9K_MODE_11G; + if (is_ht) + mode = ATH9K_MODE_11NG_HT20; + if (is_cw_40) + mode = ATH9K_MODE_11NG_HT40PLUS; + break; + case IEEE80211_BAND_5GHZ: + mode = ATH9K_MODE_11A; + if (is_ht) + mode = ATH9K_MODE_11NA_HT20; + if (is_cw_40) + mode = ATH9K_MODE_11NA_HT40PLUS; + break; + default: + DPRINTF(sc, ATH_DBG_CONFIG, "Invalid band\n"); + return NULL; + } + + BUG_ON(mode >= ATH9K_MODE_MAX); + + DPRINTF(sc, ATH_DBG_CONFIG, "Choosing rate table for mode: %d\n", mode); + return sc->hw_rate_table[mode]; +} + +static void ath_rc_init(struct ath_softc *sc, + struct ath_rate_priv *ath_rc_priv, + struct ieee80211_supported_band *sband, + struct ieee80211_sta *sta, + struct ath_rate_table *rate_table) +{ + struct ath_rateset *rateset = &ath_rc_priv->neg_rates; + u8 *ht_mcs = (u8 *)&ath_rc_priv->neg_ht_rates; + u8 i, j, k, hi = 0, hthi = 0; + + if (!rate_table) { + DPRINTF(sc, ATH_DBG_FATAL, "Rate table not initialized\n"); + return; + } + + /* Initial rate table size. Will change depending + * on the working rate set */ + ath_rc_priv->rate_table_size = RATE_TABLE_SIZE; + + /* Initialize thresholds according to the global rate table */ + for (i = 0 ; i < ath_rc_priv->rate_table_size; i++) { + ath_rc_priv->state[i].rssi_thres = + rate_table->info[i].rssi_ack_validmin; + ath_rc_priv->state[i].per = 0; + } + + /* Determine the valid rates */ + ath_rc_init_valid_txmask(ath_rc_priv); + + for (i = 0; i < WLAN_RC_PHY_MAX; i++) { + for (j = 0; j < MAX_TX_RATE_PHY; j++) + ath_rc_priv->valid_phy_rateidx[i][j] = 0; + ath_rc_priv->valid_phy_ratecnt[i] = 0; + } + + if (!rateset->rs_nrates) { + /* No working rate, just initialize valid rates */ + hi = ath_rc_init_validrates(ath_rc_priv, rate_table, + ath_rc_priv->ht_cap); + } else { + /* Use intersection of working rates and valid rates */ + hi = ath_rc_setvalid_rates(ath_rc_priv, rate_table, + rateset, ath_rc_priv->ht_cap); + if (ath_rc_priv->ht_cap & WLAN_RC_HT_FLAG) { + hthi = ath_rc_setvalid_htrates(ath_rc_priv, + rate_table, + ht_mcs, + ath_rc_priv->ht_cap); + } + hi = A_MAX(hi, hthi); + } + + ath_rc_priv->rate_table_size = hi + 1; + ath_rc_priv->rate_max_phy = 0; + ASSERT(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]; + } + ASSERT(ath_rc_priv->rate_table_size <= RATE_TABLE_SIZE); + ASSERT(k <= RATE_TABLE_SIZE); + + ath_rc_priv->max_valid_rate = k; + ath_rc_sort_validrates(rate_table, ath_rc_priv); + ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4]; + sc->cur_rate_table = rate_table; + + DPRINTF(sc, ATH_DBG_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, + bool is_cw40, bool is_sgi40) +{ + u8 caps = 0; + + if (sta->ht_cap.ht_supported) { + caps = WLAN_RC_HT_FLAG; + if (sc->sc_ah->caps.tx_chainmask != 1 && + ath9k_hw_getcapability(sc->sc_ah, ATH9K_CAP_DS, 0, NULL)) { + if (sta->ht_cap.mcs.rx_mask[1]) + caps |= WLAN_RC_DS_FLAG; + } + if (is_cw40) + caps |= WLAN_RC_40_FLAG; + if (is_sgi40) + caps |= WLAN_RC_SGI_FLAG; + } + + return caps; +} + +/***********************************/ +/* 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 ath_tx_info_priv *tx_info_priv = NULL; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ieee80211_hdr *hdr; + int final_ts_idx, tx_status = 0, is_underrun = 0; + __le16 fc; + + hdr = (struct ieee80211_hdr *)skb->data; + fc = hdr->frame_control; + tx_info_priv = ATH_TX_INFO_PRIV(tx_info); + final_ts_idx = tx_info_priv->tx.ts_rateindex; + + if (!priv_sta || !ieee80211_is_data(fc) || + !tx_info_priv->update_rc) + goto exit; + + if (tx_info_priv->tx.ts_status & ATH9K_TXERR_FILT) + goto exit; + + /* + * 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 (tx_info_priv->tx.ts_flags & + (ATH9K_TX_DATA_UNDERRUN | ATH9K_TX_DELIM_UNDERRUN) && + ((sc->sc_ah->tx_trig_level) >= ath_rc_priv->tx_triglevel_max)) { + tx_status = 1; + is_underrun = 1; + } + + if ((tx_info_priv->tx.ts_status & ATH9K_TXERR_XRETRY) || + (tx_info_priv->tx.ts_status & ATH9K_TXERR_FIFO)) + tx_status = 1; + + ath_rc_tx_status(sc, ath_rc_priv, tx_info, final_ts_idx, tx_status, + (is_underrun) ? ATH_11N_TXMAXTRY : + tx_info_priv->tx.ts_longretry); + + /* 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)) { + u8 *qc, tid; + struct ath_node *an; + + qc = ieee80211_get_qos_ctl(hdr); + tid = qc[0] & 0xf; + an = (struct ath_node *)sta->drv_priv; + + if(ath_tx_aggr_check(sc, an, tid)) + ieee80211_start_tx_ba_session(sc->hw, hdr->addr1, tid); + } + } + + ath_debug_stat_rc(sc, skb); +exit: + kfree(tx_info_priv); +} + +static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta, + struct ieee80211_tx_rate_control *txrc) +{ + struct ieee80211_supported_band *sband = txrc->sband; + struct sk_buff *skb = txrc->skb; + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ath_softc *sc = priv; + struct ath_rate_priv *ath_rc_priv = priv_sta; + __le16 fc = hdr->frame_control; + + /* lowest rate for management and multicast/broadcast frames */ + if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) || + !sta) { + tx_info->control.rates[0].idx = rate_lowest_index(sband, sta); + tx_info->control.rates[0].count = + is_multicast_ether_addr(hdr->addr1) ? 1 : ATH_MGT_TXMAXTRY; + return; + } + + /* Find tx rate for unicast frames */ + ath_rc_ratefind(sc, ath_rc_priv, txrc); +} + +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_rate_priv *ath_rc_priv = priv_sta; + struct ath_rate_table *rate_table = NULL; + bool is_cw40, is_sgi40; + 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; + } + + is_cw40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40; + is_sgi40 = sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40; + + /* Choose rate table first */ + + if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) || + (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) || + (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)) { + rate_table = ath_choose_rate_table(sc, sband->band, + sta->ht_cap.ht_supported, + is_cw40); + } else if (sc->sc_ah->opmode == NL80211_IFTYPE_AP) { + /* cur_rate_table would be set on init through config() */ + rate_table = sc->cur_rate_table; + } + + ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, is_cw40, is_sgi40); + ath_rc_init(sc, priv_sta, sband, sta, rate_table); +} + +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; + struct ath_rate_table *rate_table = NULL; + bool oper_cw40 = false, oper_sgi40; + bool local_cw40 = (ath_rc_priv->ht_cap & WLAN_RC_40_FLAG) ? + true : false; + bool local_sgi40 = (ath_rc_priv->ht_cap & WLAN_RC_SGI_FLAG) ? + true : false; + + /* FIXME: Handle AP mode later when we support CWM */ + + if (changed & IEEE80211_RC_HT_CHANGED) { + if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) + return; + + if (sc->hw->conf.channel_type == NL80211_CHAN_HT40MINUS || + sc->hw->conf.channel_type == NL80211_CHAN_HT40PLUS) + oper_cw40 = true; + + oper_sgi40 = (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40) ? + true : false; + + if ((local_cw40 != oper_cw40) || (local_sgi40 != oper_sgi40)) { + rate_table = ath_choose_rate_table(sc, sband->band, + sta->ht_cap.ht_supported, + oper_cw40); + ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, + oper_cw40, oper_sgi40); + ath_rc_init(sc, priv_sta, sband, sta, rate_table); + + DPRINTF(sc, ATH_DBG_CONFIG, + "Operating HT Bandwidth changed to: %d\n", + sc->hw->conf.channel_type); + } + } +} + +static void *ath_rate_alloc(struct ieee80211_hw *hw, struct dentry *debugfsdir) +{ + struct ath_wiphy *aphy = hw->priv; + return aphy->sc; +} + +static void ath_rate_free(void *priv) +{ + return; +} + +static void *ath_rate_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp) +{ + struct ath_softc *sc = priv; + struct ath_rate_priv *rate_priv; + + rate_priv = kzalloc(sizeof(struct ath_rate_priv), gfp); + if (!rate_priv) { + DPRINTF(sc, ATH_DBG_FATAL, + "Unable to allocate private rc structure\n"); + return NULL; + } + + rate_priv->rssi_down_time = jiffies_to_msecs(jiffies); + rate_priv->tx_triglevel_max = sc->sc_ah->caps.tx_triglevel_max; + + return rate_priv; +} + +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, +}; + +void ath_rate_attach(struct ath_softc *sc) +{ + sc->hw_rate_table[ATH9K_MODE_11B] = + &ar5416_11b_ratetable; + sc->hw_rate_table[ATH9K_MODE_11A] = + &ar5416_11a_ratetable; + sc->hw_rate_table[ATH9K_MODE_11G] = + &ar5416_11g_ratetable; + sc->hw_rate_table[ATH9K_MODE_11NA_HT20] = + &ar5416_11na_ratetable; + sc->hw_rate_table[ATH9K_MODE_11NG_HT20] = + &ar5416_11ng_ratetable; + sc->hw_rate_table[ATH9K_MODE_11NA_HT40PLUS] = + &ar5416_11na_ratetable; + sc->hw_rate_table[ATH9K_MODE_11NA_HT40MINUS] = + &ar5416_11na_ratetable; + sc->hw_rate_table[ATH9K_MODE_11NG_HT40PLUS] = + &ar5416_11ng_ratetable; + sc->hw_rate_table[ATH9K_MODE_11NG_HT40MINUS] = + &ar5416_11ng_ratetable; +} + +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); +} |