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ath9k: update the ath_max_4ms_framelen table

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Include MCS0-31 and also add SGI for HT20. This makes it
possible to support more different rate combinations with
newer hardware.

Based on a patch by Selvam. T.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2010-04-19 19:57:32 +02:00 committed by John W. Linville
parent 7817e4ceb6
commit 0e668cde0d
1 changed files with 27 additions and 14 deletions
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41
drivers/net/wireless/ath/ath9k/xmit.c
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@ -71,24 +71,36 @@ static void ath_tx_rc_status(struct ath_buf *bf, struct ath_tx_status *ts,
int nbad, int txok, bool update_rc);
enum {
MCS_DEFAULT,
MCS_HT20,
MCS_HT20_SGI,
MCS_HT40,
MCS_HT40_SGI,
};
static int ath_max_4ms_framelen[3][16] = {
[MCS_DEFAULT] = {
3216, 6434, 9650, 12868, 19304, 25740, 28956, 32180,
6430, 12860, 19300, 25736, 38600, 51472, 57890, 64320,
static int ath_max_4ms_framelen[4][32] = {
[MCS_HT20] = {
3212, 6432, 9648, 12864, 19300, 25736, 28952, 32172,
6424, 12852, 19280, 25708, 38568, 51424, 57852, 64280,
9628, 19260, 28896, 38528, 57792, 65532, 65532, 65532,
12828, 25656, 38488, 51320, 65532, 65532, 65532, 65532,
},
[MCS_HT20_SGI] = {
3572, 7144, 10720, 14296, 21444, 28596, 32172, 35744,
7140, 14284, 21428, 28568, 42856, 57144, 64288, 65532,
10700, 21408, 32112, 42816, 64228, 65532, 65532, 65532,
14256, 28516, 42780, 57040, 65532, 65532, 65532, 65532,
},
[MCS_HT40] = {
6684, 13368, 20052, 26738, 40104, 53476, 60156, 66840,
13360, 26720, 40080, 53440, 80160, 106880, 120240, 133600,
6680, 13360, 20044, 26724, 40092, 53456, 60140, 65532,
13348, 26700, 40052, 53400, 65532, 65532, 65532, 65532,
20004, 40008, 60016, 65532, 65532, 65532, 65532, 65532,
26644, 53292, 65532, 65532, 65532, 65532, 65532, 65532,
},
[MCS_HT40_SGI] = {
/* TODO: Only MCS 7 and 15 updated, recalculate the rest */
6684, 13368, 20052, 26738, 40104, 53476, 60156, 74200,
13360, 26720, 40080, 53440, 80160, 106880, 120240, 148400,
7420, 14844, 22272, 29696, 44544, 59396, 65532, 65532,
14832, 29668, 44504, 59340, 65532, 65532, 65532, 65532,
22232, 44464, 65532, 65532, 65532, 65532, 65532, 65532,
29616, 59232, 65532, 65532, 65532, 65532, 65532, 65532,
}
};
@ -538,12 +550,13 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
break;
}
if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
modeidx = MCS_HT40_SGI;
else if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
if (rates[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
modeidx = MCS_HT40;
else
modeidx = MCS_DEFAULT;
modeidx = MCS_HT20;
if (rates[i].flags & IEEE80211_TX_RC_SHORT_GI)
modeidx++;
frmlen = ath_max_4ms_framelen[modeidx][rates[i].idx];
max_4ms_framelen = min(max_4ms_framelen, frmlen);