/* $NetBSD: athrate-sample.h,v 1.3 2006/03/02 03:38:45 dyoung Exp $ */ /*- * Copyright (c) 2005 John Bicket * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any * redistribution must be conditioned upon including a substantially * similar Disclaimer requirement for further binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGES. * * $FreeBSD: src/sys/dev/ath/ath_rate/sample/sample.h,v 1.3 2005/03/20 01:27:33 sam Exp $ */ /* * Defintions for the Atheros Wireless LAN controller driver. */ #ifndef _DEV_ATH_RATE_SAMPLE_H #define _DEV_ATH_RATE_SAMPLE_H /* per-device state */ struct sample_softc { struct ath_ratectrl arc; /* base state */ int ath_smoothing_rate; /* ewma percentage (out of 100) */ int ath_sample_rate; /* send a different bit-rate 1/X packets */ }; #define ATH_SOFTC_SAMPLE(sc) ((struct sample_softc *)sc->sc_rc) struct rate_info { int rate; int rix; int rateCode; int shortPreambleRateCode; }; struct rate_stats { unsigned average_tx_time; int successive_failures; int tries; int total_packets; int packets_acked; unsigned perfect_tx_time; /* transmit time for 0 retries */ int last_tx; }; /* * for now, we track performance for three different packet * size buckets */ #define NUM_PACKET_SIZE_BINS 3 static int packet_size_bins[NUM_PACKET_SIZE_BINS] = {250, 1600, 3000}; /* per-node state */ struct sample_node { int static_rate_ndx; int num_rates; struct rate_info rates[IEEE80211_RATE_MAXSIZE]; struct rate_stats stats[NUM_PACKET_SIZE_BINS][IEEE80211_RATE_MAXSIZE]; int last_sample_ndx[NUM_PACKET_SIZE_BINS]; int current_sample_ndx[NUM_PACKET_SIZE_BINS]; int packets_sent[NUM_PACKET_SIZE_BINS]; int current_rate[NUM_PACKET_SIZE_BINS]; int packets_since_switch[NUM_PACKET_SIZE_BINS]; unsigned ticks_since_switch[NUM_PACKET_SIZE_BINS]; int packets_since_sample[NUM_PACKET_SIZE_BINS]; unsigned sample_tt[NUM_PACKET_SIZE_BINS]; }; #define ATH_NODE_SAMPLE(an) ((struct sample_node *)&an[1]) #ifndef MIN #define MIN(a,b) ((a) < (b) ? (a) : (b)) #endif #ifndef MAX #define MAX(a,b) ((a) > (b) ? (a) : (b)) #endif #define WIFI_CW_MIN 31 #define WIFI_CW_MAX 1023 struct ar5212_desc { /* * tx_control_0 */ u_int32_t frame_len:12; u_int32_t reserved_12_15:4; u_int32_t xmit_power:6; u_int32_t rts_cts_enable:1; u_int32_t veol:1; u_int32_t clear_dest_mask:1; u_int32_t ant_mode_xmit:4; u_int32_t inter_req:1; u_int32_t encrypt_key_valid:1; u_int32_t cts_enable:1; /* * tx_control_1 */ u_int32_t buf_len:12; u_int32_t more:1; u_int32_t encrypt_key_index:7; u_int32_t frame_type:4; u_int32_t no_ack:1; u_int32_t comp_proc:2; u_int32_t comp_iv_len:2; u_int32_t comp_icv_len:2; u_int32_t reserved_31:1; /* * tx_control_2 */ u_int32_t rts_duration:15; u_int32_t duration_update_enable:1; u_int32_t xmit_tries0:4; u_int32_t xmit_tries1:4; u_int32_t xmit_tries2:4; u_int32_t xmit_tries3:4; /* * tx_control_3 */ u_int32_t xmit_rate0:5; u_int32_t xmit_rate1:5; u_int32_t xmit_rate2:5; u_int32_t xmit_rate3:5; u_int32_t rts_cts_rate:5; u_int32_t reserved_25_31:7; /* * tx_status_0 */ u_int32_t frame_xmit_ok:1; u_int32_t excessive_retries:1; u_int32_t fifo_underrun:1; u_int32_t filtered:1; u_int32_t rts_fail_count:4; u_int32_t data_fail_count:4; u_int32_t virt_coll_count:4; u_int32_t send_timestamp:16; /* * tx_status_1 */ u_int32_t done:1; u_int32_t seq_num:12; u_int32_t ack_sig_strength:8; u_int32_t final_ts_index:2; u_int32_t comp_success:1; u_int32_t xmit_antenna:1; u_int32_t reserved_25_31_x:7; } __packed; /* * Calculate the transmit duration of a frame. */ static unsigned calc_usecs_unicast_packet(struct ath_softc *sc, int length, int rix, int short_retries, int long_retries) { const HAL_RATE_TABLE *rt = sc->sc_currates; int rts, cts; unsigned t_slot = 20; unsigned t_difs = 50; unsigned t_sifs = 10; struct ieee80211com *ic = &sc->sc_ic; int tt = 0; int x = 0; int cw = WIFI_CW_MIN; int cix = rt->info[rix].controlRate; KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode)); if (!rt->info[rix].rateKbps) { printf("rix %d (%d) bad ratekbps %d mode %u", rix, rt->info[rix].dot11Rate, rt->info[rix].rateKbps, sc->sc_curmode); return 0; } /* * XXX getting mac/phy level timings should be fixed for turbo * rates, and there is probably a way to get this from the * hal... */ switch (rt->info[rix].phy) { case IEEE80211_T_OFDM: t_slot = 9; t_sifs = 16; t_difs = 28; /* fall through */ case IEEE80211_T_TURBO: t_slot = 9; t_sifs = 8; t_difs = 28; break; case IEEE80211_T_DS: /* fall through to default */ default: /* pg 205 ieee.802.11.pdf */ t_slot = 20; t_difs = 50; t_sifs = 10; } rts = cts = 0; if ((ic->ic_flags & IEEE80211_F_USEPROT) && rt->info[rix].phy == IEEE80211_T_OFDM) { if (ic->ic_protmode == IEEE80211_PROT_RTSCTS) rts = 1; else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY) cts = 1; cix = rt->info[sc->sc_protrix].controlRate; } if (0 /*length > ic->ic_rtsthreshold */) { rts = 1; } if (rts || cts) { int ctsrate = rt->info[cix].rateCode; int ctsduration = 0; if (!rt->info[cix].rateKbps) { printf("cix %d (%d) bad ratekbps %d mode %u", cix, rt->info[cix].dot11Rate, rt->info[cix].rateKbps, sc->sc_curmode); return 0; } ctsrate |= rt->info[cix].shortPreamble; if (rts) /* SIFS + CTS */ ctsduration += rt->info[cix].spAckDuration; ctsduration += ath_hal_computetxtime(sc->sc_ah, rt, length, rix, AH_TRUE); if (cts) /* SIFS + ACK */ ctsduration += rt->info[cix].spAckDuration; tt += (short_retries + 1) * ctsduration; } tt += t_difs; tt += (long_retries+1)*(t_sifs + rt->info[rix].spAckDuration); tt += (long_retries+1)*ath_hal_computetxtime(sc->sc_ah, rt, length, rix, AH_TRUE); for (x = 0; x <= short_retries + long_retries; x++) { cw = MIN(WIFI_CW_MAX, (cw + 1) * 2); tt += (t_slot * cw/2); } return tt; } #endif /* _DEV_ATH_RATE_SAMPLE_H */