diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2010-04-19 21:57:33 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-04-20 19:50:53 +0400 |
| commit | c666387682faaec7d7b4a8afd30b0b6bc0816ddb (patch) | |
| tree | 5e3b37b850d469b393cae603732326f61caa5205 | |
| parent | 0e668cde0d78fb1b5f1f5e9a4bf7f9900269c98e (diff) | |
| download | linux-c666387682faaec7d7b4a8afd30b0b6bc0816ddb.tar.xz | |
ath9k: reduce the bits_per_symbol table size, support more streams
Instead of increasing bits_per_symbol for supporting more streams, keep
it single-stream only and multiply the values by the numer of streams.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/xmit.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c index 4078982fb9e9..2237658144e6 100644 --- a/drivers/net/wireless/ath/ath9k/xmit.c +++ b/drivers/net/wireless/ath/ath9k/xmit.c @@ -34,7 +34,7 @@ #define OFDM_SIFS_TIME 16 -static u32 bits_per_symbol[][2] = { +static u16 bits_per_symbol[][2] = { /* 20MHz 40MHz */ { 26, 54 }, /* 0: BPSK */ { 52, 108 }, /* 1: QPSK 1/2 */ @@ -44,14 +44,6 @@ static u32 bits_per_symbol[][2] = { { 208, 432 }, /* 5: 64-QAM 2/3 */ { 234, 486 }, /* 6: 64-QAM 3/4 */ { 260, 540 }, /* 7: 64-QAM 5/6 */ - { 52, 108 }, /* 8: BPSK */ - { 104, 216 }, /* 9: QPSK 1/2 */ - { 156, 324 }, /* 10: QPSK 3/4 */ - { 208, 432 }, /* 11: 16-QAM 1/2 */ - { 312, 648 }, /* 12: 16-QAM 3/4 */ - { 416, 864 }, /* 13: 64-QAM 2/3 */ - { 468, 972 }, /* 14: 64-QAM 3/4 */ - { 520, 1080 }, /* 15: 64-QAM 5/6 */ }; #define IS_HT_RATE(_rate) ((_rate) & 0x80) @@ -601,7 +593,7 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, u32 nsymbits, nsymbols; u16 minlen; u8 flags, rix; - int width, half_gi, ndelim, mindelim; + int width, streams, half_gi, ndelim, mindelim; /* Select standard number of delimiters based on frame length alone */ ndelim = ATH_AGGR_GET_NDELIM(frmlen); @@ -641,7 +633,8 @@ static int ath_compute_num_delims(struct ath_softc *sc, struct ath_atx_tid *tid, if (nsymbols == 0) nsymbols = 1; - nsymbits = bits_per_symbol[rix][width]; + streams = HT_RC_2_STREAMS(rix); + nsymbits = bits_per_symbol[rix % 8][width] * streams; minlen = (nsymbols * nsymbits) / BITS_PER_BYTE; if (frmlen < minlen) { @@ -1533,8 +1526,9 @@ static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, pktlen = bf_isaggr(bf) ? bf->bf_al : bf->bf_frmlen; /* find number of symbols: PLCP + data */ + streams = HT_RC_2_STREAMS(rix); nbits = (pktlen << 3) + OFDM_PLCP_BITS; - nsymbits = bits_per_symbol[rix][width]; + nsymbits = bits_per_symbol[rix % 8][width] * streams; nsymbols = (nbits + nsymbits - 1) / nsymbits; if (!half_gi) @@ -1543,7 +1537,6 @@ static u32 ath_pkt_duration(struct ath_softc *sc, u8 rix, struct ath_buf *bf, duration = SYMBOL_TIME_HALFGI(nsymbols); /* addup duration for legacy/ht training and signal fields */ - streams = HT_RC_2_STREAMS(rix); duration += L_STF + L_LTF + L_SIG + HT_SIG + HT_STF + HT_LTF(streams); return duration; |