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Updated the radar pulse analysis algorithm 

Merge from branches/madwifi-dfs@4049


git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@4077 0192ed92-7a03-0410-a25b-9323aeb14dbd
This commit is contained in:
benoit 2009-07-11 17:25:26 +00:00
parent 1b019e9b0d
commit 8c022a1869
1 changed files with 412 additions and 312 deletions
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724
ath/if_ath_radar.c
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@ -75,6 +75,9 @@
#undef MIN
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#undef SQR
#define SQR(x) ((x)*(x))
#include "ah.h"
#include "if_ath_hal.h"
@ -89,18 +92,22 @@
#define nofloat_pct(_value, _pct) \
( (_value * (1000 + _pct)) / 1000 )
/* convert units used for the rp_width into us. This conversion is based on
* measure and might not be very accurate */
#define WIDTH_TO_TSF(x) (((x) * 200) / 256)
struct radar_pattern_specification {
/* The name of the rule/specification (i.e. what did we detect) */
const char *name;
/* Interval MIN = 1000000 / FREQ - 2%
/* Interval MIN = 1000000 / FREQ - 0.1%
* (a.k.a. Pulse/Burst Repetition Interval) */
u_int32_t min_rep_int;
/* Interval MAX = 1000000 / FREQ + 2%
/* Interval MAX = 1000000 / FREQ + 0.1%
* (a.k.a. Pulse/Burst Repetition Interval) */
u_int32_t max_rep_int;
/* Do we adjust the min/max interval values dynamically
* based upon running mean interval? */
HAL_BOOL dyn_ints;
/* AH_FALSE for ETSI radars, AH_TRUE for FCC radars. Used to adjust
* the timestamp of the pulse using the pulse width */
HAL_BOOL is_fcc;
/* Fuzz factor dynamic matching, as unsigned integer percentage
* of variation (i.e. 2 for +/- 2% timing) */
u_int32_t fuzz_pct;
@ -122,31 +129,51 @@ struct radar_pattern_specification {
static struct radar_pattern_specification radar_patterns[] = {
#ifdef DFS_DOMAIN_ETSI
{"ETSI - PRF200", 4900, 5100, AH_FALSE, 20, 3, 4, 10, 4, 8, AH_TRUE},
{"ETSI - PRF300", 3267, 3399, AH_FALSE, 20, 3, 4, 10, 4, 6, AH_TRUE},
{"ETSI - PRF500", 1960, 2040, AH_FALSE, 20, 4, 4, 10, 4, 8, AH_TRUE},
{"ETSI - PRF750", 1307, 1359, AH_FALSE, 20, 5, 4, 15, 4, 13, AH_TRUE},
{"ETSI - PRF800", 1225, 1275, AH_FALSE, 20, 4, 4, 10, 4, 8, AH_TRUE},
{"ETSI - PRF1000", 980, 1020, AH_FALSE, 20, 4, 4, 10, 4, 8, AH_TRUE},
{"ETSI - PRF1200", 817, 849, AH_FALSE, 20, 5, 4, 15, 4, 13, AH_TRUE},
{"ETSI - PRF1500", 653, 679, AH_FALSE, 20, 5, 4, 15, 4, 6, AH_TRUE},
{"ETSI - PRF1600", 613, 637, AH_FALSE, 20, 5, 4, 15, 4, 7, AH_TRUE},
{"ETSI - PRF2000", 490, 510, AH_FALSE, 20, 7, 4, 20, 4, 10, AH_TRUE},
{"ETSI - PRF2300", 426, 442, AH_FALSE, 20, 9, 4, 25, 6, 20, AH_TRUE},
{"ETSI - PRF3000", 327, 339, AH_FALSE, 20, 7, 4, 20, 5, 20, AH_TRUE},
{"ETSI - PRF3500", 280, 290, AH_FALSE, 20, 9, 4, 25, 2, 20, AH_TRUE},
{"ETSI - PRF4000", 245, 255, AH_FALSE, 20, 7, 4, 20, 5, 20, AH_TRUE},
/* ETSI - Type 2 - 1,2,5us - PRF 200 - BURST 10 or
ETSI - Type 3 - 10,15us - PRF 200 - BURST 15 */
{"ETSI - PRF200", 4995, 5005, AH_FALSE, 20, 4, 4, 15, 4, 8, AH_TRUE},
/* ETSI - Type 2 - 1,2,5us - PRF 300 - BURST 10 or
ETSI - Type 3 - 10,15us - PRF 300 - BURST 15 */
{"ETSI - PRF300", 3329, 3337, AH_FALSE, 20, 4, 4, 15, 4, 6, AH_TRUE},
/* ETSI - Type 2 - 1,2,5us - PRF 500 - BURST 10 or
ETSI - Type 3 - 10,15us - PRF 500 - BURST 15 */
{"ETSI - PRF500", 1998, 2002, AH_FALSE, 20, 4, 4, 15, 4, 8, AH_TRUE},
/* ETSI - Type 1 - 1us - PRF 750 - BURST 15 */
{"ETSI - PRF750", 1331, 1335, AH_FALSE, 20, 5, 4, 15, 4, 13, AH_TRUE},
/* ETSI - Type 2 - 1,2,5us - PRF 800 - BURST 10 or
ETSI - Type 3 - 10,15us - PRF 800 - BURST 15 */
{"ETSI - PRF800", 1248, 1252, AH_FALSE, 20, 4, 4, 15, 4, 8, AH_TRUE},
/* ETSI - Type 2 - 1,2,5us - PRF 1000 - BURST 10 or
ETSI - Type 3 - 10,15us - PRF 1000 - BURST 15 */
{"ETSI - PRF1000", 999, 1001, AH_FALSE, 20, 4, 4, 15, 4, 8, AH_TRUE},
/* ETSI - Type 4 - 1,2,5,10,15us - PRF 1200 - BURST 15 */
{"ETSI - PRF1200", 832, 834, AH_FALSE, 20, 5, 4, 15, 4, 13, AH_TRUE},
/* ETSI - Type 4 - 1,2,5,10,15us - PRF 1500 - BURST 15 */
{"ETSI - PRF1500", 665, 667, AH_FALSE, 20, 5, 4, 15, 4, 6, AH_TRUE},
/* ETSI - Type 4 - 1,2,5,10,15us - PRF 1600 - BURST 15 */
{"ETSI - PRF1600", 624, 626, AH_FALSE, 20, 5, 4, 15, 4, 7, AH_TRUE},
/* ETSI - Type 6 - 20,30us - PRF 2000 - BURST 20 */
{"ETSI - PRF2000", 499, 501, AH_FALSE, 20, 6, 4, 20, 4, 10, AH_TRUE},
/* ETSI - Type 5 - 1,2,5,10,15us - PRF 2300 - BURST 25 */
{"ETSI - PRF2300", 432, 435, AH_FALSE, 20, 8, 4, 25, 6, 20, AH_TRUE},
/* ETSI - Type 5 - 1,2,5,10,15us - PRF 3000 - BURST 25 or
ETSI - Type 6 - 20,30us - PRF 3000 - BURST 20 */
{"ETSI - PRF3000", 332, 334, AH_FALSE, 20, 6, 4, 25, 5, 20, AH_TRUE},
/* ETSI - Type 5 - 1,2,5,10,15us - PRF 3500 - BURST 25 */
{"ETSI - PRF3500", 284, 286, AH_FALSE, 20, 8, 4, 25, 2, 20, AH_TRUE},
/* ETSI - Type 5 - 1,2,5,10,15us - PRF 4000 - BURST 25 or
ETSI - Type 6 - 20,30us - PRF 4000 - BURST 20 */
{"ETSI - PRF4000", 249, 251, AH_FALSE, 20, 6, 4, 25, 5, 20, AH_TRUE},
#endif
#ifdef DFS_DOMAIN_FCC
{"FCC - Type 1", 1399, 1714, AH_TRUE, 10, 5, 10, 18, 4, 6, AH_FALSE},
{"FCC - Type 2", 147, 235, AH_TRUE, 10, 8, 10, 29, 6, 12, AH_FALSE},
{"FCC - Type 3-4", 196, 273, AH_TRUE, 10, 8, 8, 18, 2, 16, AH_FALSE},
{"FCC - Type 3-4", 275, 352, AH_TRUE, 10, 8, 8, 18, 2, 16, AH_FALSE},
{"FCC - Type 3-4", 354, 431, AH_TRUE, 10, 8, 8, 18, 2, 16, AH_FALSE},
{"FCC - Type 3-4", 433, 510, AH_TRUE, 10, 8, 8, 18, 2, 16, AH_FALSE},
{"FCC - Type 3-4", 235, 313, AH_TRUE, 10, 8, 8, 18, 2, 16, AH_FALSE},
{"FCC - Type 3-4", 314, 392, AH_TRUE, 10, 8, 8, 18, 2, 16, AH_FALSE},
{"FCC - Type 3-4", 393, 471, AH_TRUE, 10, 8, 8, 18, 2, 16, AH_FALSE}
/* FCC - Type 1 - 1us - PRI 1428 - BURST 18 */
{"FCC - Type 1", 1426, 1430, AH_TRUE, 10, 6, 6, 18, 4, 6, AH_FALSE},
/* FCC - Type 2 - 1/5us - PRI 150/230 - BURST 23/29 */
{"FCC - Type 2", 149, 231, AH_TRUE, 10, 8, 8, 29, 6, 12, AH_FALSE},
/* FCC - Type 3 - 6/10us - PRI 200/500 - BURST 16/18 */
{"FCC - Type 3", 199, 501, AH_TRUE, 10, 6, 6, 18, 6, 12, AH_FALSE},
/* FCC - Type 4 - 11/20us - PRI 200/500 - BURST 12/16 */
{"FCC - Type 4", 199, 501, AH_TRUE, 10, 5, 5, 16, 6, 12, AH_FALSE}
#endif
};
@ -259,8 +286,7 @@ int ath_radar_update(struct ath_softc *sc)
if (required) {
new_radar |= AR5K_PHY_RADAR_ENABLE;
new_filter |= AR5K_AR5212_PHY_ERR_FIL_RADAR;
new_rxfilt |= (HAL_RX_FILTER_PHYERR |
HAL_RX_FILTER_PHYRADAR);
new_rxfilt |= HAL_RX_FILTER_PHYRADAR;
new_mask |= HAL_INT_RXPHY;
new_ier |= HAL_INT_RXPHY;
} else {
@ -828,22 +854,13 @@ static HAL_BOOL rp_analyze_short_pulse(
unsigned int best_missed = 0;
unsigned int best_pri = 0;
unsigned int best_cr = 0;
u_int64_t t0;
u_int64_t t0_min, t0_max, t1, t_min, t_max;
u_int32_t noise = 0, matched = 0, missed = 0, partial_miss = 0;
struct ath_rp *pulse;
u_int32_t pulse_count_minimum = 0;
struct radar_pattern_specification *pattern = NULL;
struct radar_pattern_specification *best_pattern = NULL;
u_int32_t new_period = 0;
u_int64_t last_tsf = 0;
u_int32_t last_seen_period = 0;
u_int32_t sum_periods = 0;
u_int32_t mean_period = 0;
u_int32_t adjusted_max_rep_int = 0;
u_int32_t adjusted_min_rep_int = 0;
if (index)
*index = 0;
if (pri)
@ -866,11 +883,11 @@ static HAL_BOOL rp_analyze_short_pulse(
* - since we have a limited and known number of radar patterns, we
* loop on all possible radar pulse period
*
* - we start the search from the last timestamp (t1), going
* backward in time, up to the point for the first possible radar
* pulse, ie t0_min - PERIOD * BURST_MAX
* - we start the search from the last timestamp (t0), going backward
* in time, up to the point for the first possible radar pulse, ie
* t0 - PERIOD_MAX * BURST_MAX
*
* - on this timescale, we matched the number of hit/missed using T -
* - on this timescale, we matched the number of hit/missed using t0 -
* PERIOD * n taking into account the 2% error margin (using
* min_rep_int, max_rep_int)
*
@ -882,80 +899,63 @@ static HAL_BOOL rp_analyze_short_pulse(
* This exceeds all known Atheros MTBF so, forget about TSF roll over.
*/
/* t1 is the timestamp of the last radar pulse */
t1 = (u_int64_t)last_pulse->rp_tsf;
/* loop through all patterns */
for (i = 0; i < sizetab(radar_patterns); i++) {
int matched = 1, missed = 0, partial_miss = 0, noise = 0;
int64_t t, last_t, t_min, t_avg, t_max, tn_max;
int A, B, N, C, D, SUM_SQR;
int a, a_min, a_avg, a_max;
int b, b_min, b_avg, b_max;
int count;
int last_matched = 0;
pattern = &radar_patterns[i];
/* underflow */
if ((pattern->min_rep_int *
(pattern->min_evts - 1)) >= t1) {
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: %s skipped (last pulse isn't old enough to"
" match this pattern). %10llu >= %10llu.\n",
SC_DEV_NAME(sc), pattern->name,
(unsigned long long)(
pattern->min_rep_int *
pattern->min_evts),
(unsigned long long)t1);
continue;
}
/* t0 is the timestamp of the beginning of the last radar
* pulse. We assume that the hardware reports the end of the
* pulse, so we compute the beginning based on the reported
* pulse width, which might larger than the real pulse.
*
* BIG WARNING : using FCC samples, it seems that this
* correction is not needed at all, so we are using the
* dyn_ints flag to avoid this correction */
t0 = last_pulse->rp_tsf;
if (!pattern->is_fcc)
t0 -= WIDTH_TO_TSF(last_pulse->rp_width);
/* this min formula is to check for underflow. It's the
* minimum needed duration to gather specified number of
* matches, assuming minimum match interval. */
t0_min = (pattern->min_rep_int *
pattern->min_evts) < t1 ?
t1 - (pattern->min_rep_int *
pattern->min_evts) : 0;
/* initial values for a_min, a_avg, a_max and b_min, b_avg,
* b_max */
a_min = -10;
a_avg = 0;
a_max = +10;
b_min = pattern->min_rep_int;
b_avg = (pattern->min_rep_int + pattern->max_rep_int)/2;
b_max = pattern->max_rep_int;
/* initial values for t_min, t_avg, t_max */
t_min = a_min + b_min;
t_avg = a_avg + b_avg;
t_max = a_max + b_max;
/* this max formula is to stop when we exceed maximum time
* period for the pattern. It's the oldest possible TSF that
* could match. */
t0_max = (pattern->max_rep_int *
pattern->max_evts) < t1 ?
t1 - (pattern->max_rep_int *
pattern->max_evts) : 0;
* period for the pattern. It's the oldest possible value for
* t that could match. */
tn_max = a_max + b_max*(pattern->max_evts-1);
/* we directly start with the timestamp before t1 */
last_t = -1;
A = 0;
B = 0;
N = 1;
C = 0;
D = 0;
SUM_SQR = 0;
/* we directly start with the timestamp before t0 */
pulse = pulse_prev(last_pulse);
/* initial values for t_min, t_max */
t_min = pattern->max_rep_int < t1 ?
t1 - pattern->max_rep_int : 0;
t_max = pattern->min_rep_int < t1 ?
t1 - pattern->min_rep_int : 0;
last_tsf = t1;
last_seen_period = 0;
sum_periods = 0;
matched = 0;
noise = 0;
missed = 0;
partial_miss = 0;
mean_period = 0;
adjusted_max_rep_int =
pattern->max_rep_int;
adjusted_min_rep_int =
pattern->min_rep_int;
for (;;) {
if (mean_period && pattern->dyn_ints) {
u_int32_t fuzz_pct = pattern->fuzz_pct;
adjusted_max_rep_int =
MIN(nofloat_pct(mean_period, fuzz_pct),
pattern->max_rep_int);
adjusted_min_rep_int =
MAX(nofloat_pct(mean_period, -fuzz_pct),
pattern->min_rep_int);
}
else {
adjusted_max_rep_int = pattern->max_rep_int;
adjusted_min_rep_int = pattern->min_rep_int;
}
/* check if we are at the end of the list */
if (&pulse->list == &sc->sc_rp_list)
@ -963,193 +963,316 @@ static HAL_BOOL rp_analyze_short_pulse(
if (!pulse->rp_allocated)
break;
t = t0 - pulse->rp_tsf;
if (!pattern->is_fcc)
t += WIDTH_TO_TSF(pulse->rp_width);
/* Do not go too far... this is an optimization to not
* keep checking after we hit maximum time span for the
* pattern. */
if (pulse->rp_tsf < t0_max) {
* keep checking after we hit maximum time span for
* the pattern. */
if ((t < 0) || (t > tn_max)) {
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: %s matching stopped (pulse->rp_tsf"
" < t0_max). t1=%10llu t0_max=%10llu "
"t_min=%10llu t_max=%10llu matched=%u "
"missed=%u\n", SC_DEV_NAME(sc),
"%-17s [%2d] tsf: %10llu width: %3u "
"t:%5lld [range: %5lld-%5lld] [%2d] "
"%s\n",
pattern->name,
(unsigned long long)t1,
(unsigned long long)t0_max,
(unsigned long long)t_min,
(unsigned long long)t_max,
matched, missed);
break;
}
/* if we missed more than specified number of pulses,
* we stop searching */
if (partial_miss >
pattern->max_consecutive_missing) {
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: %s matching stopped (too many "
"consecutive pulses missing). %d>%d "
"matched=%u. missed=%u.\n",
SC_DEV_NAME(sc), pattern->name,
partial_miss,
pattern->max_consecutive_missing,
matched, missed);
pulse->rp_index,
pulse->rp_tsf,
pulse->rp_width,
t, t_min, t_max,
matched+missed+partial_miss,
"overflow");
break;
}
new_period = (u_int64_t)
(last_tsf && last_tsf > pulse->rp_tsf) ?
last_tsf - pulse->rp_tsf : 0;
if (pulse->rp_tsf > t_max) {
/* we want to find the previous pulse in the range
* [t_min, t_max] which is closest to t_avg */
if (t < t_min) {
/* t < t_min : this pulse is not matching the
* current radar pattern, it is just
* noise. Ignore it by going to the next
* pulse */
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: %-17s [%2d] %5s [**:**] tsf: "
"%10llu [range: %5llu-%5llu]. width: "
"%3d. period: %4llu. last_period: %4llu"
". mean_period: %4llu. last_tsf: %10llu"
".\n",
SC_DEV_NAME(sc),
"%-17s [%2d] tsf: %10llu width: %3u "
"t:%5lld [range: %5lld-%5lld] [%2d] "
"%s\n",
pattern->name,
pulse->rp_index,
"noise",
(unsigned long long)pulse->rp_tsf,
(unsigned long long)t_min,
(unsigned long long)t_max,
(u_int8_t)pulse->rp_width,
(unsigned long long)new_period,
(unsigned long long)last_seen_period,
(unsigned long long)mean_period,
(unsigned long long)last_tsf);
pulse->rp_tsf,
pulse->rp_width,
t, t_min, t_max,
matched+missed+partial_miss,
"noise");
/* this event is noise, ignore it */
pulse = pulse_prev(pulse);
noise++;
} else if (pulse->rp_tsf >= t_min) {
/* we found a match */
matched++;
if (partial_miss)
new_period /= (partial_miss + 1);
missed += partial_miss;
partial_miss = 0;
sum_periods += new_period;
mean_period = matched ?
(sum_periods / matched) :
0;
if (mean_period &&
pattern->dyn_ints &&
(mean_period >
pattern->max_rep_int ||
mean_period <
pattern->min_rep_int)) {
} else if (t <= t_max) {
/* t_min <= t <= t_max : this pulse is
* matching the current radar pattern */
if (last_t == -1) {
/* this pulse is the first matching pulse */
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: %s mean period deviated "
"from original range [period: "
"%4u, range: %4u-%4u]\n",
SC_DEV_NAME(sc),
"%-17s [%2d] tsf: %10llu width: %3u "
"t:%5lld [range: %5lld-%5lld] [%2d] "
"%s\n",
pattern->name,
mean_period,
pattern->min_rep_int,
pattern->max_rep_int);
break;
pulse->rp_index,
pulse->rp_tsf,
pulse->rp_width,
t, t_min, t_max,
matched+missed+partial_miss,
"first match");
matched ++;
missed += partial_miss;
partial_miss = 0;
last_t = t;
count = matched+missed+partial_miss-1;
A += t;
B += t*count;
N += 1;
C += count;
D += count*count;
SUM_SQR += SQR( t - (a_avg+b_avg*count));
} else {
/* this pulse is not the first
* matching pulse. Check if it is
* closest to t_avg than the existing
* pulse */
if (labs(t-t_avg) < labs(last_t-t_avg)) {
/* this pulse is closer to
* t_avg. Update computation
* and go to the next pulse */
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%-17s [%2d] tsf: %10llu width: %3u "
"t:%5lld [range: %5lld-%5lld] [%2d] "
"%s\n",
pattern->name,
pulse->rp_index,
pulse->rp_tsf,
pulse->rp_width,
t, t_min, t_max,
matched+missed+partial_miss,
"better match");
count = matched+missed+partial_miss-1;
A -= last_t;
B -= last_t*count;
SUM_SQR -= SQR( last_t - (a_avg+b_avg*count));
A += t;
B += t*count;
SUM_SQR += SQR( last_t - (a_avg+b_avg*count));
noise ++;
last_t = t;
} else {
/* this pulse is further to t_avg. */
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%-17s [%2d] tsf: %10llu width: %3u "
"t:%5lld [range: %5lld-%5lld] [%2d] "
"%s\n",
pattern->name,
pulse->rp_index,
pulse->rp_tsf,
pulse->rp_width,
t, t_min, t_max,
matched+missed+partial_miss,
"worst match");
noise ++;
}
}
/* Remember we are scanning backwards... */
/* go to the previous pulse */
pulse = pulse_prev(pulse);
} else {
/* t > t_max : this pulse is not matching the
* current radar pattern yet. Update range */
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: %-17s [%2d] %5s [%2d:%-2d] tsf: "
"%10llu [range: %5llu-%5llu]. width: "
"%3d. period: %4llu. last_period: %4llu"
". mean_period: %4llu. last_tsf: %10llu"
".\n",
SC_DEV_NAME(sc),
"%-17s [%2d] tsf: %10llu width: %3u "
"t:%5lld [range: %5lld-%5lld] [%2d] "
"%s\n",
pattern->name,
pulse->rp_index,
"match",
MAX(matched + missed + partial_miss - 1,
0),
(matched + missed + partial_miss),
(unsigned long long)pulse->rp_tsf,
(unsigned long long)t_min,
(unsigned long long)t_max,
(u_int8_t)pulse->rp_width,
(unsigned long long)new_period,
(unsigned long long)last_seen_period,
(unsigned long long)mean_period,
(unsigned long long)last_tsf);
pulse->rp_tsf,
pulse->rp_width,
t, t_min, t_max,
matched + missed + partial_miss,
"range update");
/* record tsf and period */
last_seen_period = new_period;
last_tsf = pulse->rp_tsf;
/* advance to next pulse */
pulse = pulse_prev(pulse);
/* we do not found a pulse in the current
* range, we increase the number of miss */
if (last_t == -1) {
partial_miss++;
/* update bounds */
t_min = adjusted_max_rep_int < last_tsf ?
last_tsf - adjusted_max_rep_int :
0;
t_max = adjusted_min_rep_int < last_tsf ?
last_tsf - adjusted_min_rep_int :
0;
} else {
partial_miss++;
/* if we missed more than specified number of
* pulses, we stop searching */
if ((missed + partial_miss) >
pattern->max_missing) {
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: %s matching stopped (too "
"many total pulses missing). "
"%d>%d matched=%u. missed=%u."
"\n",
SC_DEV_NAME(sc),
pattern->name,
missed,
pattern->max_missing,
matched,
missed);
break;
/* if we missed more than the
* specified partial number of pulses,
* we stop searching */
if (partial_miss > pattern->max_consecutive_missing) {
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%-17s matching stopped (too many "
"consecutive pulses missing). %d>%d "
"matched=%d. missed=%d.\n",
pattern->name,
partial_miss,
pattern->max_consecutive_missing,
matched, missed);
break;
}
/* if we missed more than the
* specified total number of pulses,
* we stop searching */
if (missed + partial_miss > pattern->max_missing) {
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%-17s matching stopped (too "
"many total pulses missing). "
"%d>%d matched=%d. missed=%d."
"\n",
pattern->name,
missed,
pattern->max_missing,
matched,
missed);
break;
}
}
/* Default mean period to approximate center
* of range. Remember we are scanning
* backwards... */
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: %-17s [**] %5s [%2d:%-2d] tsf: "
"(missing) [range: %5llu-%5llu]. "
"width: ***. period: ****. last_period:"
" %4llu. mean_period: %4llu. last_tsf: "
"%10llu.\n",
SC_DEV_NAME(sc),
pattern->name,
"missed",
MAX(matched + missed + partial_miss - 1,
0),
(matched + missed + partial_miss),
(unsigned long long)t_min,
(unsigned long long)t_max,
(unsigned long long)last_seen_period,
(unsigned long long)mean_period,
(unsigned long long)last_tsf);
/* update bounds */
t_min = adjusted_max_rep_int < t_min ?
t_min - adjusted_max_rep_int :
0;
t_max = adjusted_min_rep_int < t_max ?
t_max - adjusted_min_rep_int :
0;
/* Quick update to b */
if ((1 < matched) && (matched < 4) &&
(matched!=last_matched)) {
int c = a_avg, d = b_avg;
if (C*C-N*D != 0) {
a = a_avg;
b = (C*A-N*B)/(C*C-N*D);
b_avg = b;
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%-17s updating b_avg to %d\n",
pattern->name, b_avg);
SUM_SQR += (SQR(a)-SQR(c))*N+2*(a*b-c*d)*C+(SQR(b)-SQR(d))*D
-2*(a-c)*A-2*(b-d)*B;
last_matched = matched;
}
}
/* Update (a,b) */
if ((matched >= 4) &&
(matched != last_matched)) {
int c = a_avg, d = b_avg;
if (C*C-N*D != 0) {
a=(C*B-A*D)/(C*C-N*D);
b=(C*A-N*B)/(C*C-N*D);
a_min = a-10;
a_avg = a;
a_max = a+10;
b_min = b-1;
b_avg = b;
b_max = b+1;
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%-17s updating a to (%d,%d,%d) and b to (%d,%d,%d)\n",
pattern->name,
a_min, a_avg, a_max,
b_min, b_avg, b_max);
SUM_SQR += (SQR(a)-SQR(c))*N+2*(a*b-c*d)*C+(SQR(b)-SQR(d))*D
-2*(a-c)*A-2*(b-d)*B;
last_matched = matched;
}
}
/* Update range */
count = matched+missed+partial_miss;
t_min = a_min + b_min*count;
t_avg = a_avg + b_avg*count;
t_max = a_max + b_max*count;
/* Check if we intersect with previous/next range */
/* t_min < t_max(count-1) */
if ((count>=1) && (t_min < a_max + b_max*(count-1))) {
t_min = a_avg + b_avg*count - b_avg/2;
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%-17s [%2d] tsf: %10llu width: %3u "
"t:%5lld [range: %5lld-%5lld] [%2d] "
"%s\n",
pattern->name,
pulse->rp_index,
pulse->rp_tsf,
pulse->rp_width,
t, t_min, t_max,
matched + missed + partial_miss,
"updated t_min");
}
/* t_max > t_min(count+1) */
if (t_max > a_min + b_min*(count+1)) {
t_max = a_avg + b_avg*count + b_avg/2;
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%-17s [%2d] tsf: %10llu width: %3u "
"t:%5lld [range: %5lld-%5lld] [%2d] "
"%s\n",
pattern->name,
pulse->rp_index,
pulse->rp_tsf,
pulse->rp_width,
t, t_min, t_max,
matched + missed + partial_miss,
"updated t_max");
}
last_t = -1;
}
}
/* print counters for this PRF */
if (matched > 1) {
/* print counters for this PRF (we avoid case where the
* variance is greater than 100). 100 is based on the fact
* that most pulses are less than 10us from the ideal value
* and as such, variance should be less than 100 */
if ((matched > 1) &&
(N != 0) && (SUM_SQR/N<100)) {
int compare_result = CR_FALLTHROUGH;
int match_result = MR_MATCH;
/* we add one to the matched since we counted only the
* time differences */
/* matched++; not sure... */
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%-17s matched %d missed %d mean_period %d noise %d variance %d\n",
pattern->name,
matched,
missed,
b_avg,
noise,
SUM_SQR/N);
/* check if PRF counters match a known radar, if we are
* confident enought */
if (MR_MATCH == (match_result = match_radar(
matched,
missed,
mean_period,
b_avg,
noise,
pattern->min_evts,
pattern->max_evts,
@ -1161,7 +1284,7 @@ static HAL_BOOL rp_analyze_short_pulse(
compare_radar_matches(
matched,
missed,
mean_period,
b_avg,
noise,
pattern->min_evts,
pattern->max_evts,
@ -1184,10 +1307,9 @@ static HAL_BOOL rp_analyze_short_pulse(
}
if (DFLAG_ISSET(sc, ATH_DEBUG_DOTHFILT)) {
DPRINTF(sc, ATH_DEBUG_DOTHFILT,
"%s: [%02d] %13s: %-17s [match=%2u {%2u"
"[%02d] %13s: %-17s [match=%2u {%2u"
"..%2u},missed=%2u/%2u,dur=%2d {%2u.."
"%2u},noise=%2u/%2u,cr:%d]\n",
SC_DEV_NAME(sc),
last_pulse->rp_index,
compare_result > CR_FALLTHROUGH ?
"NEW-BEST" :
@ -1211,16 +1333,15 @@ static HAL_BOOL rp_analyze_short_pulse(
best_missed = missed;
best_index = i;
best_pattern = pattern;
best_pri = mean_period;
best_pri = b_avg;
best_noise = noise;
best_cr = compare_result;
}
else if (compare_result <= CR_FALLTHROUGH) {
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: %s match not better than best so "
"%-17s match not better than best so "
"far. cr: %d matched: %d missed: "
"%d min_evts: %d\n",
SC_DEV_NAME(sc),
pattern->name,
compare_result,
matched,
@ -1231,10 +1352,9 @@ static HAL_BOOL rp_analyze_short_pulse(
}
if (-1 != best_index) {
DPRINTF(sc, ATH_DEBUG_DOTHFILTVBSE,
"%s: [%02d] %10s: %-17s [match=%2u {%2u..%2u},missed="
"[%02d] %10s: %-17s [match=%2u {%2u..%2u},missed="
"%2u/%2u,dur=%2d {%2u..%2u},noise=%2u/%2u,cr=%2d] "
"RI=%-9u RF=%-4u\n",
SC_DEV_NAME(sc),
last_pulse->rp_index,
"BEST/PULSE",
best_pattern->name,
@ -1407,12 +1527,11 @@ static HAL_BOOL rp_analyze(struct ath_softc *sc)
best_cr = compare_result;
}
DPRINTF(sc, ATH_DEBUG_DOTHFILT,
"%s: %10s: %-17s [match=%2u "
"%10s: %-17s [match=%2u "
"{%2u..%2u}, missed=%2u/%2u, "
"dur=%2d {%2u..%2u}, "
"noise=%2u/%2u, cr=%2d] "
"RI=%-9u RF=%-4u\n",
DEV_NAME(sc->sc_dev),
(compare_result > CR_FALLTHROUGH) ?
"BETTER" : "WORSE",
radar_patterns[index].name,
@ -1457,10 +1576,9 @@ static HAL_BOOL rp_analyze(struct ath_softc *sc)
best_pattern =
&radar_patterns[best_index];
DPRINTF(sc, ATH_DEBUG_DOTHFILT,
"%s: %10s: %-17s [match=%2u {%2u..%2u},missed="
"%10s: %-17s [match=%2u {%2u..%2u},missed="
"%2u/%2u,dur=%2d {%2u..%2u},noise=%2u/%2u,cr=%2d] "
"RI=%-9u RF=%-4u\n",
DEV_NAME(sc->sc_dev),
"BEST MATCH",
best_pattern->name,
best_matched,
@ -1480,9 +1598,8 @@ static HAL_BOOL rp_analyze(struct ath_softc *sc)
}
else {
DPRINTF(sc, ATH_DEBUG_DOTHFILT,
"%s: %10s: %-17s [match=%2u {%2u..%2u},missed="
"%10s: %-17s [match=%2u {%2u..%2u},missed="
"%2u/%2u,noise=%2u/%2u]\n",
DEV_NAME(sc->sc_dev),
"BEST MATCH",
get_longpulse_desc(best_lp_bc),
best_lp_bc,
@ -1495,16 +1612,13 @@ static HAL_BOOL rp_analyze(struct ath_softc *sc)
);
}
#endif /* #ifdef ATH_RADAR_LONG_PULSE */
if (DFLAG_ISSET(sc, ATH_DEBUG_DOTHFILT)) {
DPRINTF(sc, ATH_DEBUG_DOTHFILT,
"%s: ========================================\n",
DEV_NAME(sc->sc_dev));
DPRINTF(sc, ATH_DEBUG_DOTHFILT,
"%s: ==BEGIN RADAR SAMPLE====================\n",
DEV_NAME(sc->sc_dev));
DPRINTF(sc, ATH_DEBUG_DOTHFILT,
"%s: ========================================\n",
DEV_NAME(sc->sc_dev));
if (DFLAG_ISSET(sc, ATH_DEBUG_DOTHPULSES)) {
DPRINTF(sc, ATH_DEBUG_DOTHPULSES,
"========================================\n");
DPRINTF(sc, ATH_DEBUG_DOTHPULSES,
"==BEGIN RADAR SAMPLE====================\n");
DPRINTF(sc, ATH_DEBUG_DOTHPULSES,
"========================================\n");
#ifdef ATH_RADAR_LONG_PULSE
if (!best_lp_bc) {
@ -1512,11 +1626,10 @@ static HAL_BOOL rp_analyze(struct ath_softc *sc)
best_pattern =
&radar_patterns[best_index];
DPRINTF(sc, ATH_DEBUG_DOTHPULSES,
"%s: Sample contains data matching %s "
"Sample contains data matching %-17s "
"[match=%2u {%2u..%2u}, "
"missed=%2u/%2u, dur=%2d {%2u..%2u}, "
"noise=%2u/%2u,cr=%d] RI=%-9u RF=%-4u\n",
DEV_NAME(sc->sc_dev),
best_pattern->name,
best_matched,
best_pattern->min_pulse,
@ -1633,15 +1746,16 @@ void ath_rp_record(struct ath_softc *sc, u_int64_t tsf, u_int8_t rssi,
{
struct ath_rp *pulse;
DPRINTF(sc, ATH_DEBUG_DOTHPULSES, "%s: ath_rp_record: "
DPRINTF(sc, ATH_DEBUG_DOTHPULSES,
"tsf=%10llu rssi=%3u width=%3u%s\n",
SC_DEV_NAME(sc), (unsigned long long)tsf, rssi, width,
tsf, rssi, width,
sc->sc_rp_ignored ? " (ignored)" : "");
if (sc->sc_rp_ignored) {
return;
}
#if 0
/* pulses width 255 seems to trigger false detection of radar. we
* ignored it then. */
@ -1649,6 +1763,7 @@ void ath_rp_record(struct ath_softc *sc, u_int64_t tsf, u_int8_t rssi,
/* ignored */
return ;
}
#endif
/* check if the new radar pulse is after the last one recorded, or
* else, we flush the history */
@ -1738,36 +1853,21 @@ void ath_rp_print_mem(struct ath_softc *sc, int analyzed_pulses_only)
void ath_rp_print(struct ath_softc *sc, int analyzed_pulses_only)
{
struct ath_rp *pulse;
u_int64_t oldest_tsf = ~0;
IPRINTF(sc, "Pulse dump of %spulses from ring buffer containing %d "
"pulses.\n",
analyzed_pulses_only ? "analyzed " : "",
sc->sc_rp_num);
/* Find oldest TSF value so we can print relative times */
oldest_tsf = ~0;
list_for_each_entry_reverse(pulse, &sc->sc_rp_list, list)
if (pulse->rp_allocated && pulse->rp_tsf < oldest_tsf)
oldest_tsf = pulse->rp_tsf;
DPRINTF(sc, ATH_DEBUG_DOTHPULSES,
"Pulse dump of %spulses from ring buffer containing %d "
"pulses.\n",
analyzed_pulses_only ? "analyzed " : "",
sc->sc_rp_num);
list_for_each_entry_reverse(pulse, &sc->sc_rp_list, list) {
if (!pulse->rp_allocated)
continue;
if ((!analyzed_pulses_only) || pulse->rp_analyzed)
IPRINTF(sc, "Pulse [%3d, %p] : relative_tsf=%10llu "
"tsf=%10llu rssi=%3u width=%3u allocated=%d "
"analyzed=%d next=%p prev=%p\n",
pulse->rp_index,
pulse,
(unsigned long long)(pulse->rp_tsf - oldest_tsf),
(unsigned long long)pulse->rp_tsf,
pulse->rp_rssi,
pulse->rp_width,
pulse->rp_allocated,
pulse->rp_analyzed,
pulse->list.next,
pulse->list.prev);
if ((!analyzed_pulses_only) || pulse->rp_analyzed) {
DPRINTF(sc, ATH_DEBUG_DOTHPULSES,
"tsf=%10llu rssi=%3u width=%3u\n",
pulse->rp_tsf, pulse->rp_rssi, pulse->rp_width);
}
}
}