/* * Copyright (c) 2010 Broadcom Corporation * * 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 #include #include #include #include #include #include #include #include "wlc_types.h" #include "d11.h" #include "wl_dbg.h" #include "wlc_cfg.h" #include "wlc_scb.h" #include "wlc_pub.h" #include "wlc_rate.h" /* Rate info per rate: It tells whether a rate is ofdm or not and its phy_rate value */ const u8 rate_info[WLC_MAXRATE + 1] = { /* 0 1 2 3 4 5 6 7 8 9 */ /* 0 */ 0x00, 0x00, 0x0a, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */ 0x00, 0x37, 0x8b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8f, 0x00, /* 20 */ 0x00, 0x00, 0x6e, 0x00, 0x8a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8e, 0x00, 0x00, 0x00, /* 40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x89, 0x00, /* 50 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */ 0x00, 0x00, 0x8d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 90 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, 0x00, 0x00, /* 100 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8c }; /* rates are in units of Kbps */ const mcs_info_t mcs_table[MCS_TABLE_SIZE] = { /* MCS 0: SS 1, MOD: BPSK, CR 1/2 */ {6500, 13500, CEIL(6500 * 10, 9), CEIL(13500 * 10, 9), 0x00, WLC_RATE_6M}, /* MCS 1: SS 1, MOD: QPSK, CR 1/2 */ {13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x08, WLC_RATE_12M}, /* MCS 2: SS 1, MOD: QPSK, CR 3/4 */ {19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x0A, WLC_RATE_18M}, /* MCS 3: SS 1, MOD: 16QAM, CR 1/2 */ {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x10, WLC_RATE_24M}, /* MCS 4: SS 1, MOD: 16QAM, CR 3/4 */ {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x12, WLC_RATE_36M}, /* MCS 5: SS 1, MOD: 64QAM, CR 2/3 */ {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x19, WLC_RATE_48M}, /* MCS 6: SS 1, MOD: 64QAM, CR 3/4 */ {58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x1A, WLC_RATE_54M}, /* MCS 7: SS 1, MOD: 64QAM, CR 5/6 */ {65000, 135000, CEIL(65000 * 10, 9), CEIL(135000 * 10, 9), 0x1C, WLC_RATE_54M}, /* MCS 8: SS 2, MOD: BPSK, CR 1/2 */ {13000, 27000, CEIL(13000 * 10, 9), CEIL(27000 * 10, 9), 0x40, WLC_RATE_6M}, /* MCS 9: SS 2, MOD: QPSK, CR 1/2 */ {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0x48, WLC_RATE_12M}, /* MCS 10: SS 2, MOD: QPSK, CR 3/4 */ {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x4A, WLC_RATE_18M}, /* MCS 11: SS 2, MOD: 16QAM, CR 1/2 */ {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0x50, WLC_RATE_24M}, /* MCS 12: SS 2, MOD: 16QAM, CR 3/4 */ {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x52, WLC_RATE_36M}, /* MCS 13: SS 2, MOD: 64QAM, CR 2/3 */ {104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0x59, WLC_RATE_48M}, /* MCS 14: SS 2, MOD: 64QAM, CR 3/4 */ {117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x5A, WLC_RATE_54M}, /* MCS 15: SS 2, MOD: 64QAM, CR 5/6 */ {130000, 270000, CEIL(130000 * 10, 9), CEIL(270000 * 10, 9), 0x5C, WLC_RATE_54M}, /* MCS 16: SS 3, MOD: BPSK, CR 1/2 */ {19500, 40500, CEIL(19500 * 10, 9), CEIL(40500 * 10, 9), 0x80, WLC_RATE_6M}, /* MCS 17: SS 3, MOD: QPSK, CR 1/2 */ {39000, 81000, CEIL(39000 * 10, 9), CEIL(81000 * 10, 9), 0x88, WLC_RATE_12M}, /* MCS 18: SS 3, MOD: QPSK, CR 3/4 */ {58500, 121500, CEIL(58500 * 10, 9), CEIL(121500 * 10, 9), 0x8A, WLC_RATE_18M}, /* MCS 19: SS 3, MOD: 16QAM, CR 1/2 */ {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0x90, WLC_RATE_24M}, /* MCS 20: SS 3, MOD: 16QAM, CR 3/4 */ {117000, 243000, CEIL(117000 * 10, 9), CEIL(243000 * 10, 9), 0x92, WLC_RATE_36M}, /* MCS 21: SS 3, MOD: 64QAM, CR 2/3 */ {156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0x99, WLC_RATE_48M}, /* MCS 22: SS 3, MOD: 64QAM, CR 3/4 */ {175500, 364500, CEIL(175500 * 10, 9), CEIL(364500 * 10, 9), 0x9A, WLC_RATE_54M}, /* MCS 23: SS 3, MOD: 64QAM, CR 5/6 */ {195000, 405000, CEIL(195000 * 10, 9), CEIL(405000 * 10, 9), 0x9B, WLC_RATE_54M}, /* MCS 24: SS 4, MOD: BPSK, CR 1/2 */ {26000, 54000, CEIL(26000 * 10, 9), CEIL(54000 * 10, 9), 0xC0, WLC_RATE_6M}, /* MCS 25: SS 4, MOD: QPSK, CR 1/2 */ {52000, 108000, CEIL(52000 * 10, 9), CEIL(108000 * 10, 9), 0xC8, WLC_RATE_12M}, /* MCS 26: SS 4, MOD: QPSK, CR 3/4 */ {78000, 162000, CEIL(78000 * 10, 9), CEIL(162000 * 10, 9), 0xCA, WLC_RATE_18M}, /* MCS 27: SS 4, MOD: 16QAM, CR 1/2 */ {104000, 216000, CEIL(104000 * 10, 9), CEIL(216000 * 10, 9), 0xD0, WLC_RATE_24M}, /* MCS 28: SS 4, MOD: 16QAM, CR 3/4 */ {156000, 324000, CEIL(156000 * 10, 9), CEIL(324000 * 10, 9), 0xD2, WLC_RATE_36M}, /* MCS 29: SS 4, MOD: 64QAM, CR 2/3 */ {208000, 432000, CEIL(208000 * 10, 9), CEIL(432000 * 10, 9), 0xD9, WLC_RATE_48M}, /* MCS 30: SS 4, MOD: 64QAM, CR 3/4 */ {234000, 486000, CEIL(234000 * 10, 9), CEIL(486000 * 10, 9), 0xDA, WLC_RATE_54M}, /* MCS 31: SS 4, MOD: 64QAM, CR 5/6 */ {260000, 540000, CEIL(260000 * 10, 9), CEIL(540000 * 10, 9), 0xDB, WLC_RATE_54M}, /* MCS 32: SS 1, MOD: BPSK, CR 1/2 */ {0, 6000, 0, CEIL(6000 * 10, 9), 0x00, WLC_RATE_6M}, }; /* phycfg for legacy OFDM frames: code rate, modulation scheme, spatial streams * Number of spatial streams: always 1 * other fields: refer to table 78 of section 17.3.2.2 of the original .11a standard */ typedef struct legacy_phycfg { u32 rate_ofdm; /* ofdm mac rate */ u8 tx_phy_ctl3; /* phy ctl byte 3, code rate, modulation type, # of streams */ } legacy_phycfg_t; #define LEGACY_PHYCFG_TABLE_SIZE 12 /* Number of legacy_rate_cfg entries in the table */ /* In CCK mode LPPHY overloads OFDM Modulation bits with CCK Data Rate */ /* Eventually MIMOPHY would also be converted to this format */ /* 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps */ static const legacy_phycfg_t legacy_phycfg_table[LEGACY_PHYCFG_TABLE_SIZE] = { {WLC_RATE_1M, 0x00}, /* CCK 1Mbps, data rate 0 */ {WLC_RATE_2M, 0x08}, /* CCK 2Mbps, data rate 1 */ {WLC_RATE_5M5, 0x10}, /* CCK 5.5Mbps, data rate 2 */ {WLC_RATE_11M, 0x18}, /* CCK 11Mbps, data rate 3 */ {WLC_RATE_6M, 0x00}, /* OFDM 6Mbps, code rate 1/2, BPSK, 1 spatial stream */ {WLC_RATE_9M, 0x02}, /* OFDM 9Mbps, code rate 3/4, BPSK, 1 spatial stream */ {WLC_RATE_12M, 0x08}, /* OFDM 12Mbps, code rate 1/2, QPSK, 1 spatial stream */ {WLC_RATE_18M, 0x0A}, /* OFDM 18Mbps, code rate 3/4, QPSK, 1 spatial stream */ {WLC_RATE_24M, 0x10}, /* OFDM 24Mbps, code rate 1/2, 16-QAM, 1 spatial stream */ {WLC_RATE_36M, 0x12}, /* OFDM 36Mbps, code rate 3/4, 16-QAM, 1 spatial stream */ {WLC_RATE_48M, 0x19}, /* OFDM 48Mbps, code rate 2/3, 64-QAM, 1 spatial stream */ {WLC_RATE_54M, 0x1A}, /* OFDM 54Mbps, code rate 3/4, 64-QAM, 1 spatial stream */ }; /* Hardware rates (also encodes default basic rates) */ const wlc_rateset_t cck_ofdm_mimo_rates = { 12, { /* 1b, 2b, 5.5b, 6, 9, 11b, 12, 18, 24, 36, 48, 54 Mbps */ 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c}, 0x00, {0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; const wlc_rateset_t ofdm_mimo_rates = { 8, { /* 6b, 9, 12b, 18, 24b, 36, 48, 54 Mbps */ 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c}, 0x00, {0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; /* Default ratesets that include MCS32 for 40BW channels */ const wlc_rateset_t cck_ofdm_40bw_mimo_rates = { 12, { /* 1b, 2b, 5.5b, 6, 9, 11b, 12, 18, 24, 36, 48, 54 Mbps */ 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c}, 0x00, {0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; const wlc_rateset_t ofdm_40bw_mimo_rates = { 8, { /* 6b, 9, 12b, 18, 24b, 36, 48, 54 Mbps */ 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c}, 0x00, {0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; const wlc_rateset_t cck_ofdm_rates = { 12, { /* 1b, 2b, 5.5b, 6, 9, 11b, 12, 18, 24, 36, 48, 54 Mbps */ 0x82, 0x84, 0x8b, 0x0c, 0x12, 0x96, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c}, 0x00, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; const wlc_rateset_t gphy_legacy_rates = { 4, { /* 1b, 2b, 5.5b, 11b Mbps */ 0x82, 0x84, 0x8b, 0x96}, 0x00, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; const wlc_rateset_t ofdm_rates = { 8, { /* 6b, 9, 12b, 18, 24b, 36, 48, 54 Mbps */ 0x8c, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6c}, 0x00, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; const wlc_rateset_t cck_rates = { 4, { /* 1b, 2b, 5.5, 11 Mbps */ 0x82, 0x84, 0x0b, 0x16}, 0x00, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} }; static bool wlc_rateset_valid(wlc_rateset_t *rs, bool check_brate); /* check if rateset is valid. * if check_brate is true, rateset without a basic rate is considered NOT valid. */ static bool wlc_rateset_valid(wlc_rateset_t *rs, bool check_brate) { uint idx; if (!rs->count) return false; if (!check_brate) return true; /* error if no basic rates */ for (idx = 0; idx < rs->count; idx++) { if (rs->rates[idx] & WLC_RATE_FLAG) return true; } return false; } void wlc_rateset_mcs_upd(wlc_rateset_t *rs, u8 txstreams) { int i; for (i = txstreams; i < MAX_STREAMS_SUPPORTED; i++) rs->mcs[i] = 0; } /* filter based on hardware rateset, and sort filtered rateset with basic bit(s) preserved, * and check if resulting rateset is valid. */ bool wlc_rate_hwrs_filter_sort_validate(wlc_rateset_t *rs, const wlc_rateset_t *hw_rs, bool check_brate, u8 txstreams) { u8 rateset[WLC_MAXRATE + 1]; u8 r; uint count; uint i; memset(rateset, 0, sizeof(rateset)); count = rs->count; for (i = 0; i < count; i++) { /* mask off "basic rate" bit, WLC_RATE_FLAG */ r = (int)rs->rates[i] & RATE_MASK; if ((r > WLC_MAXRATE) || (rate_info[r] == 0)) { continue; } rateset[r] = rs->rates[i]; /* preserve basic bit! */ } /* fill out the rates in order, looking at only supported rates */ count = 0; for (i = 0; i < hw_rs->count; i++) { r = hw_rs->rates[i] & RATE_MASK; ASSERT(r <= WLC_MAXRATE); if (rateset[r]) rs->rates[count++] = rateset[r]; } rs->count = count; /* only set the mcs rate bit if the equivalent hw mcs bit is set */ for (i = 0; i < MCSSET_LEN; i++) rs->mcs[i] = (rs->mcs[i] & hw_rs->mcs[i]); if (wlc_rateset_valid(rs, check_brate)) return true; else return false; } /* calculate the rate of a rx'd frame and return it as a ratespec */ ratespec_t BCMFASTPATH wlc_compute_rspec(d11rxhdr_t *rxh, u8 *plcp) { int phy_type; ratespec_t rspec = PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT; phy_type = ((rxh->RxChan & RXS_CHAN_PHYTYPE_MASK) >> RXS_CHAN_PHYTYPE_SHIFT); if ((phy_type == PHY_TYPE_N) || (phy_type == PHY_TYPE_SSN) || (phy_type == PHY_TYPE_LCN) || (phy_type == PHY_TYPE_HT)) { switch (rxh->PhyRxStatus_0 & PRXS0_FT_MASK) { case PRXS0_CCK: rspec = CCK_PHY2MAC_RATE(((cck_phy_hdr_t *) plcp)->signal); break; case PRXS0_OFDM: rspec = OFDM_PHY2MAC_RATE(((ofdm_phy_hdr_t *) plcp)-> rlpt[0]); break; case PRXS0_PREN: rspec = (plcp[0] & MIMO_PLCP_MCS_MASK) | RSPEC_MIMORATE; if (plcp[0] & MIMO_PLCP_40MHZ) { /* indicate rspec is for 40 MHz mode */ rspec &= ~RSPEC_BW_MASK; rspec |= (PHY_TXC1_BW_40MHZ << RSPEC_BW_SHIFT); } break; case PRXS0_STDN: /* fallthru */ default: /* not supported */ ASSERT(0); break; } if (PLCP3_ISSGI(plcp[3])) rspec |= RSPEC_SHORT_GI; } else if ((phy_type == PHY_TYPE_A) || (rxh->PhyRxStatus_0 & PRXS0_OFDM)) rspec = OFDM_PHY2MAC_RATE(((ofdm_phy_hdr_t *) plcp)->rlpt[0]); else rspec = CCK_PHY2MAC_RATE(((cck_phy_hdr_t *) plcp)->signal); return rspec; } /* copy rateset src to dst as-is (no masking or sorting) */ void wlc_rateset_copy(const wlc_rateset_t *src, wlc_rateset_t *dst) { memcpy(dst, src, sizeof(wlc_rateset_t)); } /* * Copy and selectively filter one rateset to another. * 'basic_only' means only copy basic rates. * 'rates' indicates cck (11b) and ofdm rates combinations. * - 0: cck and ofdm * - 1: cck only * - 2: ofdm only * 'xmask' is the copy mask (typically 0x7f or 0xff). */ void wlc_rateset_filter(wlc_rateset_t *src, wlc_rateset_t *dst, bool basic_only, u8 rates, uint xmask, bool mcsallow) { uint i; uint r; uint count; count = 0; for (i = 0; i < src->count; i++) { r = src->rates[i]; if (basic_only && !(r & WLC_RATE_FLAG)) continue; if ((rates == WLC_RATES_CCK) && IS_OFDM((r & RATE_MASK))) continue; if ((rates == WLC_RATES_OFDM) && IS_CCK((r & RATE_MASK))) continue; dst->rates[count++] = r & xmask; } dst->count = count; dst->htphy_membership = src->htphy_membership; if (mcsallow && rates != WLC_RATES_CCK) memcpy(&dst->mcs[0], &src->mcs[0], MCSSET_LEN); else wlc_rateset_mcs_clear(dst); } /* select rateset for a given phy_type and bandtype and filter it, sort it * and fill rs_tgt with result */ void wlc_rateset_default(wlc_rateset_t *rs_tgt, const wlc_rateset_t *rs_hw, uint phy_type, int bandtype, bool cck_only, uint rate_mask, bool mcsallow, u8 bw, u8 txstreams) { const wlc_rateset_t *rs_dflt; wlc_rateset_t rs_sel; if ((PHYTYPE_IS(phy_type, PHY_TYPE_HT)) || (PHYTYPE_IS(phy_type, PHY_TYPE_N)) || (PHYTYPE_IS(phy_type, PHY_TYPE_LCN)) || (PHYTYPE_IS(phy_type, PHY_TYPE_SSN))) { if (BAND_5G(bandtype)) { rs_dflt = (bw == WLC_20_MHZ ? &ofdm_mimo_rates : &ofdm_40bw_mimo_rates); } else { rs_dflt = (bw == WLC_20_MHZ ? &cck_ofdm_mimo_rates : &cck_ofdm_40bw_mimo_rates); } } else if (PHYTYPE_IS(phy_type, PHY_TYPE_LP)) { rs_dflt = (BAND_5G(bandtype)) ? &ofdm_rates : &cck_ofdm_rates; } else if (PHYTYPE_IS(phy_type, PHY_TYPE_A)) { rs_dflt = &ofdm_rates; } else if (PHYTYPE_IS(phy_type, PHY_TYPE_G)) { rs_dflt = &cck_ofdm_rates; } else { ASSERT(0); /* should not happen */ rs_dflt = &cck_rates; /* force cck */ } /* if hw rateset is not supplied, assign selected rateset to it */ if (!rs_hw) rs_hw = rs_dflt; wlc_rateset_copy(rs_dflt, &rs_sel); wlc_rateset_mcs_upd(&rs_sel, txstreams); wlc_rateset_filter(&rs_sel, rs_tgt, false, cck_only ? WLC_RATES_CCK : WLC_RATES_CCK_OFDM, rate_mask, mcsallow); wlc_rate_hwrs_filter_sort_validate(rs_tgt, rs_hw, false, mcsallow ? txstreams : 1); } s16 BCMFASTPATH wlc_rate_legacy_phyctl(uint rate) { uint i; for (i = 0; i < LEGACY_PHYCFG_TABLE_SIZE; i++) if (rate == legacy_phycfg_table[i].rate_ofdm) return legacy_phycfg_table[i].tx_phy_ctl3; return -1; } void wlc_rateset_mcs_clear(wlc_rateset_t *rateset) { uint i; for (i = 0; i < MCSSET_LEN; i++) rateset->mcs[i] = 0; } void wlc_rateset_mcs_build(wlc_rateset_t *rateset, u8 txstreams) { memcpy(&rateset->mcs[0], &cck_ofdm_mimo_rates.mcs[0], MCSSET_LEN); wlc_rateset_mcs_upd(rateset, txstreams); } /* Based on bandwidth passed, allow/disallow MCS 32 in the rateset */ void wlc_rateset_bw_mcs_filter(wlc_rateset_t *rateset, u8 bw) { if (bw == WLC_40_MHZ) setbit(rateset->mcs, 32); else clrbit(rateset->mcs, 32); }