2 * Copyright (c) 2005 John Bicket
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36 * $FreeBSD: src/sys/dev/ath/ath_rate/sample/sample.h,v 1.3.2.2 2006/08/10 06:18:57 sam Exp $
37 * $DragonFly: src/sys/dev/netif/ath/rate_sample/sample.h,v 1.4 2007/01/27 03:36:10 sephe Exp $
41 * Defintions for the Atheros Wireless LAN controller driver.
43 #ifndef _DEV_ATH_RATE_SAMPLE_H
44 #define _DEV_ATH_RATE_SAMPLE_H
46 /* per-device state */
48 struct ath_ratectrl arc; /* base state */
49 int ath_smoothing_rate; /* ewma percentage (out of 100) */
50 int ath_sample_rate; /* send a different bit-rate 1/X packets */
52 #define ATH_SOFTC_SAMPLE(sc) ((struct sample_softc *)sc->sc_rc)
58 int shortPreambleRateCode;
63 unsigned average_tx_time;
64 int successive_failures;
68 unsigned perfect_tx_time; /* transmit time for 0 retries */
73 * for now, we track performance for three different packet
76 #define NUM_PACKET_SIZE_BINS 3
77 static int packet_size_bins[NUM_PACKET_SIZE_BINS] = {250, 1600, 3000};
84 struct rate_info rates[IEEE80211_RATE_MAXSIZE];
86 struct rate_stats stats[NUM_PACKET_SIZE_BINS][IEEE80211_RATE_MAXSIZE];
87 int last_sample_ndx[NUM_PACKET_SIZE_BINS];
89 int current_sample_ndx[NUM_PACKET_SIZE_BINS];
90 int packets_sent[NUM_PACKET_SIZE_BINS];
92 int current_rate[NUM_PACKET_SIZE_BINS];
93 int packets_since_switch[NUM_PACKET_SIZE_BINS];
94 unsigned ticks_since_switch[NUM_PACKET_SIZE_BINS];
96 int packets_since_sample[NUM_PACKET_SIZE_BINS];
97 unsigned sample_tt[NUM_PACKET_SIZE_BINS];
99 #define ATH_NODE_SAMPLE(an) ((struct sample_node *)&an[1])
102 #define MIN(a,b) ((a) < (b) ? (a) : (b))
105 #define MAX(a,b) ((a) > (b) ? (a) : (b))
108 #define WIFI_CW_MIN 31
109 #define WIFI_CW_MAX 1023
115 uint32_t frame_len:12;
116 uint32_t reserved_12_15:4;
117 uint32_t xmit_power:6;
118 uint32_t rts_cts_enable:1;
120 uint32_t clear_dest_mask:1;
121 uint32_t ant_mode_xmit:4;
122 uint32_t inter_req:1;
123 uint32_t encrypt_key_valid:1;
124 uint32_t cts_enable:1;
131 uint32_t encrypt_key_index:7;
132 uint32_t frame_type:4;
134 uint32_t comp_proc:2;
135 uint32_t comp_iv_len:2;
136 uint32_t comp_icv_len:2;
137 uint32_t reserved_31:1;
142 uint32_t rts_duration:15;
143 uint32_t duration_update_enable:1;
144 uint32_t xmit_tries0:4;
145 uint32_t xmit_tries1:4;
146 uint32_t xmit_tries2:4;
147 uint32_t xmit_tries3:4;
152 uint32_t xmit_rate0:5;
153 uint32_t xmit_rate1:5;
154 uint32_t xmit_rate2:5;
155 uint32_t xmit_rate3:5;
156 uint32_t rts_cts_rate:5;
157 uint32_t reserved_25_31:7;
162 uint32_t frame_xmit_ok:1;
163 uint32_t excessive_retries:1;
164 uint32_t fifo_underrun:1;
166 uint32_t rts_fail_count:4;
167 uint32_t data_fail_count:4;
168 uint32_t virt_coll_count:4;
169 uint32_t send_timestamp:16;
176 uint32_t ack_sig_strength:8;
177 uint32_t final_ts_index:2;
178 uint32_t comp_success:1;
179 uint32_t xmit_antenna:1;
180 uint32_t reserved_25_31_x:7;
184 * Calculate the transmit duration of a frame.
187 calc_usecs_unicast_packet(struct ath_softc *sc, int length, int rix,
188 int short_retries, int long_retries)
190 const HAL_RATE_TABLE *rt = sc->sc_currates;
193 unsigned t_slot = 20;
194 unsigned t_difs = 50;
195 unsigned t_sifs = 10;
196 struct ieee80211com *ic = &sc->sc_ic;
199 int cw = WIFI_CW_MIN;
200 int cix = rt->info[rix].controlRate;
202 KASSERT(rt != NULL, ("no rate table, mode %u", sc->sc_curmode));
204 if (!rt->info[rix].rateKbps) {
205 kprintf("rix %d (%d) bad ratekbps %d mode %u\n",
206 rix, rt->info[rix].dot11Rate,
207 rt->info[rix].rateKbps,
213 * XXX getting mac/phy level timings should be fixed for turbo
214 * rates, and there is probably a way to get this from the
217 switch (rt->info[rix].phy) {
218 case IEEE80211_T_OFDM:
223 case IEEE80211_T_TURBO:
229 /* fall through to default */
231 /* pg 205 ieee.802.11.pdf */
239 if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
240 rt->info[rix].phy == IEEE80211_T_OFDM) {
241 if (ic->ic_protmode == IEEE80211_PROT_RTSCTS)
243 else if (ic->ic_protmode == IEEE80211_PROT_CTSONLY)
246 cix = rt->info[sc->sc_protrix].controlRate;
250 if (0 /*length > ic->ic_rtsthreshold */) {
255 int ctsrate = rt->info[cix].rateCode;
258 if (!rt->info[cix].rateKbps) {
259 kprintf("cix %d (%d) bad ratekbps %d mode %u\n",
260 cix, rt->info[cix].dot11Rate,
261 rt->info[cix].rateKbps,
266 ctsrate |= rt->info[cix].shortPreamble;
267 if (rts) /* SIFS + CTS */
268 ctsduration += rt->info[cix].spAckDuration;
270 ctsduration += ath_hal_computetxtime(sc->sc_ah,
271 rt, length, rix, AH_TRUE);
273 if (cts) /* SIFS + ACK */
274 ctsduration += rt->info[cix].spAckDuration;
276 tt += (short_retries + 1) * ctsduration;
279 tt += (long_retries+1)*(t_sifs + rt->info[rix].spAckDuration);
280 tt += (long_retries+1)*ath_hal_computetxtime(sc->sc_ah, rt, length,
282 for (x = 0; x <= short_retries + long_retries; x++) {
283 cw = MIN(WIFI_CW_MAX, (cw + 1) * 2);
284 tt += (t_slot * cw/2);
288 #endif /* _DEV_ATH_RATE_SAMPLE_H */