int dfs_get_filter_threshold(struct ath_softc *sc, struct dfs_filter *rf, int is_extchan_detect)
{
int ext_chan_busy=0;
int thresh, adjust_thresh=0;
struct ath_dfs *dfs = sc->sc_dfs;
thresh = rf->rf_threshold;
if (IS_CHAN_HT40(&sc->sc_curchan)) {
ext_chan_busy = ath_hal_get11nextbusy(sc->sc_ah);
if(ext_chan_busy >= 0) {
dfs->dfs_rinfo.ext_chan_busy_ts = ath_hal_gettsf64(sc->sc_ah);
dfs->dfs_rinfo.dfs_ext_chan_busy = ext_chan_busy;
} else {
// Check to see if the cached value of ext_chan_busy can be used
ext_chan_busy = 0;
if (dfs->dfs_rinfo.dfs_ext_chan_busy) {
if (dfs->dfs_rinfo.rn_lastfull_ts < dfs->dfs_rinfo.ext_chan_busy_ts) {
ext_chan_busy = dfs->dfs_rinfo.dfs_ext_chan_busy;
DFS_DPRINTK(sc, ATH_DEBUG_DFS2," THRESH Use cached copy of ext_chan_busy extchanbusy=%d rn_lastfull_ts=%llu ext_chan_busy_ts=%llu\n", ext_chan_busy ,(unsigned long long)dfs->dfs_rinfo.rn_lastfull_ts, (unsigned long long)dfs->dfs_rinfo.ext_chan_busy_ts);
}
}
}
adjust_thresh = adjust_thresh_per_chan_busy(ext_chan_busy, thresh);
DFS_DPRINTK(sc, ATH_DEBUG_DFS2," filterID=%d extchanbusy=%d adjust_thresh=%d\n", rf->rf_pulseid, ext_chan_busy, adjust_thresh);
thresh += adjust_thresh;
}
return thresh;
}
/*
* Finds the radar state entry that matches the current channel
*/
struct dfs_state *
dfs_getchanstate(struct ath_softc *sc, u_int8_t *index, int ext_chan_flag)
{
struct ath_dfs *dfs=sc->sc_dfs;
struct dfs_state *rs=NULL;
int i;
HAL_CHANNEL *cmp_ch;
if (dfs == NULL) {
DFS_DPRINTK(sc, ATH_DEBUG_DFS,"%s: sc_dfs is NULL\n",
__func__);
return NULL;
}
if (ext_chan_flag) {
cmp_ch = (ath_hal_get_extension_channel(sc->sc_ah));
if (cmp_ch) {
DFS_DPRINTK(sc, ATH_DEBUG_DFS2, "Extension channel freq = %u flags=0x%x\n", cmp_ch->channel, cmp_ch->priv_flags);
} else {
return NULL;
}
} else {
cmp_ch = &sc->sc_curchan;
DFS_DPRINTK(sc, ATH_DEBUG_DFS2, "Primary channel freq = %u flags=0x%x\n", cmp_ch->channel, cmp_ch->priv_flags);
}
for (i=0;i<DFS_NUM_RADAR_STATES; i++) {
if ((dfs->dfs_radar[i].rs_chan.channel == cmp_ch->channel) &&
(dfs->dfs_radar[i].rs_chan.channel_flags == cmp_ch->channel_flags)) {
if (index != NULL)
*index = (u_int8_t) i;
return &(dfs->dfs_radar[i]);
}
}
/* No existing channel found, look for first free channel state entry */
for (i=0; i<DFS_NUM_RADAR_STATES; i++) {
if (dfs->dfs_radar[i].rs_chan.channel == 0) {
rs = &(dfs->dfs_radar[i]);
/* Found one, set channel info and default thresholds */
rs->rs_chan = *cmp_ch;
rs->rs_firpwr = dfs->dfs_defaultparams.pe_firpwr;
rs->rs_radarrssi = dfs->dfs_defaultparams.pe_rrssi;
rs->rs_height = dfs->dfs_defaultparams.pe_height;
rs->rs_pulserssi = dfs->dfs_defaultparams.pe_prssi;
rs->rs_inband = dfs->dfs_defaultparams.pe_inband;
/* 5413 specific */
rs->rs_relpwr = dfs->dfs_defaultparams.pe_relpwr;
rs->rs_relstep = dfs->dfs_defaultparams.pe_relstep;
rs->rs_maxlen = dfs->dfs_defaultparams.pe_maxlen;
if (index != NULL)
*index = (u_int8_t) i;
return (rs);
}
}
DFS_DPRINTK(sc, ATH_DEBUG_DFS2, "%s: No more radar states left.\n", __func__);
return(NULL);
}
void ath_ar_enable(struct ath_softc *sc)
{
struct ath_dfs *dfs=sc->sc_dfs;
struct dfs_ar_state *ar;
HAL_CHANNEL *chan= &sc->sc_curchan;
HAL_PHYERR_PARAM pe;
u_int32_t rfilt=0;
if (dfs == NULL) {
DFS_DPRINTK(sc, ATH_DEBUG_DFS, "%s: sc_dfs is NULL\n",
__func__);
return;
}
ar = (struct dfs_ar_state *) &dfs->dfs_ar_state;
if (dfs->dfs_proc_phyerr & (DFS_RADAR_EN | DFS_AR_EN)) {
if ((chan->channel_flags & CHANNEL_108G) == CHANNEL_108G) {
/* We are in turbo G, so enable AR */
DFS_DPRINTK(sc, ATH_DEBUG_DFS, "%s: Enabling AR\n", __func__);
dfs_reset_ar(sc);
ar->ar_radarrssi = DFS_AR_RADAR_RSSI_THR;
rfilt = ath_hal_getrxfilter(sc->sc_ah);
pe.pe_firpwr = HAL_PHYERR_PARAM_NOVAL;
pe.pe_height = HAL_PHYERR_PARAM_NOVAL;
pe.pe_prssi = HAL_PHYERR_PARAM_NOVAL;
pe.pe_inband = HAL_PHYERR_PARAM_NOVAL;
pe.pe_relpwr = HAL_PHYERR_PARAM_NOVAL;
pe.pe_maxlen = HAL_PHYERR_PARAM_NOVAL;
pe.pe_relstep = HAL_PHYERR_PARAM_NOVAL;
pe.pe_usefir128 = 0;
pe.pe_blockradar = 0;
pe.pe_enmaxrssi = 0;
pe.pe_rrssi = ar->ar_radarrssi;
ath_hal_enabledfs(sc->sc_ah, &pe);
/* Enable strong signal fast antenna diversity since accurate
* 1-2us radar
* detection is not important for AR anyways.
*/
ath_hal_setcapability(sc->sc_ah, HAL_CAP_DIVERSITY,
HAL_CAP_STRONG_DIV, dfs->dfs_rinfo.rn_fastdivGCval, NULL);
rfilt |= HAL_RX_FILTER_PHYRADAR;
ath_hal_setrxfilter(sc->sc_ah, rfilt);
}
} else {
DFS_DPRINTK(sc, ATH_DEBUG_DFS, "%s: Disabling AR\n", __func__);
rfilt = ath_hal_getrxfilter(sc->sc_ah);
rfilt &= ~HAL_RX_FILTER_PHYRADAR;
ath_hal_setrxfilter(sc->sc_ah,rfilt);
/* Enable strong signal fast antenna diversity */
ath_hal_setcapability(sc->sc_ah, HAL_CAP_DIVERSITY,
HAL_CAP_STRONG_DIV, dfs->dfs_rinfo.rn_fastdivGCval, NULL);
}
}
void dfs_print_activity(struct ath_softc *sc)
{
int chan_busy=0, ext_chan_busy=0;
u_int32_t rxclear=0, rxframe=0, txframe=0, cycles=0;
cycles = ath_hal_getMibCycleCountsPct(sc->sc_ah,&rxclear, &rxframe, &txframe);
chan_busy = cycles;
ext_chan_busy = ath_hal_get11nextbusy(sc->sc_ah);
DFS_DPRINTK(sc, ATH_DEBUG_DFS,"cycles=%d rxclear=%d rxframe=%d txframe=%d extchanbusy=%d\n", cycles, rxclear, rxframe, txframe, ext_chan_busy);
DFS_DPRINTK(sc, ATH_DEBUG_DFS, "FILT_OFDM=0x%x FILT_CCK=0x%x\n",(0x00FFFFFF & OS_REG_READ(sc->sc_ah, 0x8124)), (0x00FFFFFF & OS_REG_READ(sc->sc_ah, 0x8128)));
return;
}
int dfs_get_pri_margin(struct ath_softc *sc, int is_extchan_detect, int is_fixed_pattern)
{
int adjust_pri=0, ext_chan_busy=0;
int pri_margin;
struct ath_dfs *dfs = sc->sc_dfs;
if (is_fixed_pattern)
pri_margin = DFS_DEFAULT_FIXEDPATTERN_PRI_MARGIN;
else
pri_margin = DFS_DEFAULT_PRI_MARGIN;
if (IS_CHAN_HT40(&sc->sc_curchan)) {
ext_chan_busy = ath_hal_get11nextbusy(sc->sc_ah);
if(ext_chan_busy >= 0) {
dfs->dfs_rinfo.ext_chan_busy_ts = ath_hal_gettsf64(sc->sc_ah);
dfs->dfs_rinfo.dfs_ext_chan_busy = ext_chan_busy;
} else {
// Check to see if the cached value of ext_chan_busy can be used
ext_chan_busy = 0;
if (dfs->dfs_rinfo.dfs_ext_chan_busy ) {
if (dfs->dfs_rinfo.rn_lastfull_ts < dfs->dfs_rinfo.ext_chan_busy_ts) {
ext_chan_busy = dfs->dfs_rinfo.dfs_ext_chan_busy;
DFS_DPRINTK(sc, ATH_DEBUG_DFS2," PRI Use cached copy of ext_chan_busy extchanbusy=%d \n", ext_chan_busy);
}
}
}
adjust_pri = adjust_pri_per_chan_busy(ext_chan_busy, pri_margin);
pri_margin -= adjust_pri;
}
return pri_margin;
}
void
dfs_set_nol(struct ath_dfs *dfs, struct dfsreq_nolelem *dfs_nol, int nchan)
{
#define TIME_IN_MS 1000
u_int32_t nol_time_left_ms;
struct ieee80211_channel chan;
int i;
if (dfs == NULL) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_NOL, "%s: sc_dfs is NULL\n", __func__);
return;
}
for (i = 0; i < nchan; i++)
{
nol_time_left_ms = adf_os_ticks_to_msecs(adf_os_ticks() - dfs_nol[i].nol_start_ticks);
if (nol_time_left_ms < dfs_nol[i].nol_timeout_ms) {
chan.ic_freq = dfs_nol[i].nol_freq;
chan.ic_flags= 0;
chan.ic_flagext = 0;
nol_time_left_ms = (dfs_nol[i].nol_timeout_ms - nol_time_left_ms);
dfs_nol_addchan(dfs, &chan, (nol_time_left_ms / TIME_IN_MS));
}
}
#undef TIME_IN_MS
dfs_nol_update(dfs);
}
void
dfs_add_pulse(struct ath_dfs_host *dfs, struct dfs_filter *rf, struct dfs_event *re,
u_int32_t deltaT)
{
u_int32_t index,n, window, pri;
struct dfs_delayline *dl;
dl = &rf->rf_dl;
/* Circular buffer of size 2^n */
index = (dl->dl_lastelem + 1) & DFS_MAX_DL_MASK;
/*if ((dl->dl_numelems+1) == DFS_MAX_DL_SIZE) */
if ((dl->dl_numelems) == DFS_MAX_DL_SIZE)
dl->dl_firstelem = (dl->dl_firstelem + 1) & DFS_MAX_DL_MASK;
else
dl->dl_numelems++;
dl->dl_lastelem = index;
dl->dl_elems[index].de_time = deltaT;
window = deltaT;
dl->dl_elems[index].de_dur = re->re_dur;
dl->dl_elems[index].de_rssi = re->re_rssi;
for (n=0;n<dl->dl_numelems-1; n++) {
index = (index-1) & DFS_MAX_DL_MASK;
pri = dl->dl_elems[index].de_time;
window += pri;
if (window > rf->rf_filterlen) {
dl->dl_firstelem = (index+1) & DFS_MAX_DL_MASK;
dl->dl_numelems = n+1;
}
}
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"dl firstElem = %d lastElem = %d\n",dl->dl_firstelem,
dl->dl_lastelem);
}
void
dfs_print_filters(struct ath_softc *sc)
{
struct ath_dfs *dfs=sc->sc_dfs;
struct dfs_filtertype *ft = NULL;
struct dfs_filter *rf;
int i,j;
if (dfs == NULL) {
DFS_DPRINTK(sc, ATH_DEBUG_DFS, "%s: sc_dfs is NULL\n", __func__);
return;
}
for (i=0; i<DFS_MAX_RADAR_TYPES; i++) {
if (dfs->dfs_radarf[i] != NULL) {
ft = dfs->dfs_radarf[i];
if((ft->ft_numfilters > DFS_MAX_NUM_RADAR_FILTERS) || (!ft->ft_numfilters))
continue;
printk("===========ft->ft_numfilters=%u===========\n", ft->ft_numfilters);
for (j=0; j<ft->ft_numfilters; j++) {
rf = &(ft->ft_filters[j]);
printk("filter[%d] filterID = %d rf_numpulses=%u; rf->rf_minpri=%u; rf->rf_maxpri=%u; rf->rf_threshold=%u; rf->rf_filterlen=%u; rf->rf_mindur=%u; rf->rf_maxdur=%u\n",j, rf->rf_pulseid,
rf->rf_numpulses, rf->rf_minpri, rf->rf_maxpri, rf->rf_threshold, rf->rf_filterlen, rf->rf_mindur, rf->rf_maxdur);
}
}
}
}
/*
* Parse the radar summary frame.
*
* The frame contents _minus_ the TLV are passed in.
*/
static void
radar_summary_parse(struct ath_dfs *dfs, const char *buf, size_t len,
struct rx_radar_status *rsu)
{
uint32_t rs[2];
/* Drop out if we have < 2 DWORDs available */
if (len < sizeof(rs)) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR |
ATH_DEBUG_DFS_PHYERR_SUM,
"%s: len (%d) < expected (%d)!\n",
__func__,
len,
sizeof(rs));
}
/*
* Since the TLVs may be unaligned for some reason
* we take a private copy into aligned memory.
* This enables us to use the HAL-like accessor macros
* into the DWORDs to access sub-DWORD fields.
*/
OS_MEMCPY(rs, buf, sizeof(rs));
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: two 32 bit values are: %08x %08x\n", __func__, rs[0], rs[1]);
// DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR, "%s (p=%p):\n", __func__, buf);
/* Populate the fields from the summary report */
rsu->tsf_offset =
MS(rs[RADAR_REPORT_PULSE_REG_2], RADAR_REPORT_PULSE_TSF_OFFSET);
rsu->pulse_duration =
MS(rs[RADAR_REPORT_PULSE_REG_2], RADAR_REPORT_PULSE_DUR);
rsu->is_chirp =
MS(rs[RADAR_REPORT_PULSE_REG_1], RADAR_REPORT_PULSE_IS_CHIRP);
rsu->sidx = sign_extend_32(
MS(rs[RADAR_REPORT_PULSE_REG_1], RADAR_REPORT_PULSE_SIDX),
10);
rsu->freq_offset =
calc_freq_offset(rsu->sidx, PERE_IS_OVERSAMPLING(dfs));
/* These are only relevant if the pulse is a chirp */
rsu->delta_peak = sign_extend_32(
MS(rs[RADAR_REPORT_PULSE_REG_1], RADAR_REPORT_PULSE_DELTA_PEAK),
6);
rsu->delta_diff =
MS(rs[RADAR_REPORT_PULSE_REG_1], RADAR_REPORT_PULSE_DELTA_DIFF);
}
/*
* Process an Owl-style phy error.
*
* Return 1 on success or 0 on failure.
*/
int
dfs_process_phyerr_owl(struct ath_dfs *dfs, void *buf, uint16_t datalen,
uint8_t rssi, uint8_t ext_rssi, uint32_t rs_tstamp,
uint64_t fulltsf, struct dfs_phy_err *e)
{
const char *cbuf = (const char *)buf;
uint8_t dur;
int event_width;
/* XXX this shouldn't be kept count here */
dfs->ath_dfs_stats.owl_phy_errors++;
/*
* HW cannot detect extension channel radar so it only passes us
* primary channel radar data
*/
if (datalen == 0)
dur = 0;
else
dur = ((uint8_t *) cbuf)[0];
/*
* This is a spurious event; toss.
*/
if (rssi == 0 && dur == 0)
dfs->ath_dfs_stats.datalen_discards++;
return 0;
/*
* Fill out dfs_phy_err with the information we have
* at hand.
*/
OS_MEMSET(e, 0, sizeof(*e));
e->rssi = rssi;
e->dur = dur;
e->is_pri = 1;
e->is_ext = 0;
e->is_dc = 0;
e->is_early = 1;
e->fulltsf = fulltsf;
e->rs_tstamp = rs_tstamp;
/*
* Owl only ever reports events on the primary channel;
* it doesn't even see events on the secondary channel.
*/
event_width = dfs_get_event_freqwidth(dfs);
e->freq = dfs_get_event_freqcentre(dfs, 1, 0, 0) * 1000;
e->freq_lo = e->freq - (event_width / 2) * 1000;
e->freq_hi = e->freq + (event_width / 2) * 1000;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR_SUM,
"%s: rssi=%u dur=%u,freq=%dMHz, freq_lo=%dMHz, freq_hi=%dMHz\n",
__func__, rssi, dur, e->freq / 1000, e->freq_lo / 1000,
e->freq_hi / 1000);
return 1;
}
u_int8_t dfs_retain_bin5_burst_pattern(struct ath_dfs_host *dfs, u_int32_t diff_ts, u_int8_t old_dur)
{
// Pulses may get split into 2 during chirping, this print is only to show that it happened, we do not handle this condition if we cannot detect the chirping
// SPLIT pulses will have a time stamp difference of < 50
if (diff_ts < 50) {
DFS_DPRINTK(dfs,ATH_DEBUG_DFS1,"%s SPLIT pulse diffTs=%u dur=%d (old_dur=%d)\n", __func__, diff_ts, dfs->dfs_rinfo.dfs_last_bin5_dur, old_dur);
}
// Check if this is the 2nd or 3rd pulse in the same burst, PRI will be between 1000 and 2000 us
if(((diff_ts >= DFS_BIN5_PRI_LOWER_LIMIT) && (diff_ts <= DFS_BIN5_PRI_HIGHER_LIMIT))) {
//This pulse belongs to the same burst as the pulse before, so return the same random duration for it
DFS_DPRINTK(dfs,ATH_DEBUG_DFS1,"%s this pulse belongs to the same burst as before, give it same dur=%d (old_dur=%d)\n", __func__, dfs->dfs_rinfo.dfs_last_bin5_dur, old_dur);
return (dfs->dfs_rinfo.dfs_last_bin5_dur);
}
// This pulse does not belong to this burst, return unchanged duration
return old_dur;
}
/*
* Delete the given frequency/chwidth from the NOL.
*/
static void
dfs_nol_delete(struct ath_dfs *dfs, u_int16_t delfreq, u_int16_t delchwidth)
{
struct dfs_nolelem *nol,**prev_next;
if (dfs == NULL) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS, "%s: sc_dfs is NULL\n", __func__);
return;
}
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_NOL,
"%s: remove channel=%d/%d MHz from NOL\n",
__func__,
delfreq, delchwidth);
prev_next = &(dfs->dfs_nol);
nol = dfs->dfs_nol;
while (nol != NULL) {
if (nol->nol_freq == delfreq && nol->nol_chwidth == delchwidth) {
*prev_next = nol->nol_next;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_NOL,
"%s removing channel %d/%dMHz from NOL tstamp=%d\n",
__func__, nol->nol_freq, nol->nol_chwidth,
(adf_os_ticks_to_msecs(adf_os_ticks()) / 1000));
OS_CANCEL_TIMER(&nol->nol_timer);
OS_FREE(nol);
nol = NULL;
nol = *prev_next;
/* Update the NOL counter */
dfs->dfs_nol_count--;
/* Be paranoid! */
if (dfs->dfs_nol_count < 0) {
DFS_PRINTK("%s: dfs_nol_count < 0; eek!\n", __func__);
dfs->dfs_nol_count = 0;
}
} else {
prev_next = &(nol->nol_next);
nol = nol->nol_next;
}
}
}
static void
radar_fft_search_report_parse(struct ath_dfs *dfs, const char *buf, size_t len,
struct rx_search_fft_report *rsfr)
{
uint32_t rs[2];
/* Drop out if we have < 2 DWORDs available */
if (len < sizeof(rs)) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR |
ATH_DEBUG_DFS_PHYERR_SUM,
"%s: len (%d) < expected (%d)!\n",
__func__,
len,
sizeof(rs));
}
/*
* Since the TLVs may be unaligned for some reason
* we take a private copy into aligned memory.
* This enables us to use the HAL-like accessor macros
* into the DWORDs to access sub-DWORD fields.
*/
OS_MEMCPY(rs, buf, sizeof(rs));
rsfr->total_gain_db = MS(rs[SEARCH_FFT_REPORT_REG_1], SEARCH_FFT_REPORT_TOTAL_GAIN_DB);
rsfr->base_pwr_db = MS(rs[SEARCH_FFT_REPORT_REG_1], SEARCH_FFT_REPORT_BASE_PWR_DB);
rsfr->fft_chn_idx = MS(rs[SEARCH_FFT_REPORT_REG_1], SEARCH_FFT_REPORT_FFT_CHN_IDX);
rsfr->peak_sidx = sign_extend_32(MS(rs[SEARCH_FFT_REPORT_REG_1], SEARCH_FFT_REPORT_PEAK_SIDX), 12);
rsfr->relpwr_db = MS(rs[SEARCH_FFT_REPORT_REG_2], SEARCH_FFT_REPORT_RELPWR_DB);
rsfr->avgpwr_db = MS(rs[SEARCH_FFT_REPORT_REG_2], SEARCH_FFT_REPORT_AVGPWR_DB);
rsfr->peak_mag = MS(rs[SEARCH_FFT_REPORT_REG_2], SEARCH_FFT_REPORT_PEAK_MAG);
rsfr->num_str_bins_ib = MS(rs[SEARCH_FFT_REPORT_REG_2], SEARCH_FFT_REPORT_NUM_STR_BINS_IB);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: two 32 bit values are: %08x %08x\n", __func__, rs[0], rs[1]);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: rsfr->total_gain_db = %d\n", __func__, rsfr->total_gain_db);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: rsfr->base_pwr_db = %d\n", __func__, rsfr->base_pwr_db);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: rsfr->fft_chn_idx = %d\n", __func__, rsfr->fft_chn_idx);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: rsfr->peak_sidx = %d\n", __func__, rsfr->peak_sidx);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: rsfr->relpwr_db = %d\n", __func__, rsfr->relpwr_db);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: rsfr->avgpwr_db = %d\n", __func__, rsfr->avgpwr_db);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: rsfr->peak_mag = %d\n", __func__, rsfr->peak_mag);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,"%s: rsfr->num_str_bins_ib = %d\n", __func__, rsfr->num_str_bins_ib);
}
void dfs_reset_ar(struct ath_softc *sc)
{
struct ath_dfs *dfs=sc->sc_dfs;
if (dfs == NULL) {
DFS_DPRINTK(sc,ATH_DEBUG_DFS, "%s: sc_dfs is NULL\n",
__func__);
return;
}
OS_MEMZERO(&dfs->dfs_ar_state, sizeof(dfs->dfs_ar_state));
dfs->dfs_ar_state.ar_packetthreshold = DFS_AR_PKT_COUNT_THRESH;
dfs->dfs_ar_state.ar_parthreshold = DFS_AR_ACK_DETECT_PAR_THRESH;
}
void
dfs_print_nol(struct ath_dfs *dfs)
{
struct dfs_nolelem *nol;
int i = 0;
uint32_t diff_ms, remaining_sec;
if (dfs == NULL) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_NOL, "%s: sc_dfs is NULL\n", __func__);
return;
}
nol = dfs->dfs_nol;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_NOL, "%s: NOL\n", __func__);
while (nol != NULL) {
diff_ms = adf_os_ticks_to_msecs(adf_os_ticks() - nol->nol_start_ticks);
diff_ms = (nol->nol_timeout_ms - diff_ms);
remaining_sec = diff_ms / 1000; /* convert to seconds */
printk("nol:%d channel=%d MHz width=%d MHz time left=%u seconds nol starttick=%llu \n",
i++, nol->nol_freq, nol->nol_chwidth, remaining_sec,
(unsigned long long)nol->nol_start_ticks);
nol = nol->nol_next;
}
}
void
dfs_print_delayline(struct ath_softc *sc, struct dfs_delayline *dl)
{
int i=0,index;
struct dfs_delayelem *de;
index = dl->dl_lastelem;
for (i=0; i<dl->dl_numelems; i++) {
de = &dl->dl_elems[index];
DFS_DPRINTK(sc, ATH_DEBUG_DFS2,
"Elem %d: ts = %u (0x%x) dur=%u\n",i,
de->de_time, de->de_time, de->de_dur);
index = (index - 1)& DFS_MAX_DL_MASK;
}
}
void
dfs_reset_radarq(struct ath_dfs *dfs)
{
struct dfs_event *event;
if (dfs == NULL) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS, "%s: sc_dfs is NULL", __func__);
return;
}
ATH_DFSQ_LOCK(dfs);
ATH_DFSEVENTQ_LOCK(dfs);
while (!STAILQ_EMPTY(&(dfs->dfs_radarq))) {
event = STAILQ_FIRST(&(dfs->dfs_radarq));
STAILQ_REMOVE_HEAD(&(dfs->dfs_radarq), re_list);
OS_MEMZERO(event, sizeof(struct dfs_event));
STAILQ_INSERT_TAIL(&(dfs->dfs_eventq), event, re_list);
}
ATH_DFSEVENTQ_UNLOCK(dfs);
ATH_DFSQ_UNLOCK(dfs);
}
void ath_ar_disable(struct ath_softc *sc)
{
u_int32_t rfilt;
HAL_CHANNEL *chan=&sc->sc_curchan;
struct ath_dfs *dfs=sc->sc_dfs;
if (dfs == NULL) {
DFS_DPRINTK(sc, ATH_DEBUG_DFS, "%s: sc_dfs is NULL\n",
__func__);
return;
}
if ((chan->channel_flags & CHANNEL_108G) == CHANNEL_108G) {
/* Enable strong signal fast antenna diversity */
ath_hal_setcapability(sc->sc_ah, HAL_CAP_DIVERSITY,
HAL_CAP_STRONG_DIV, dfs->dfs_rinfo.rn_fastdivGCval, NULL);
rfilt = ath_hal_getrxfilter(sc->sc_ah);
rfilt &= ~HAL_RX_FILTER_PHYERR;
ath_hal_setrxfilter(sc->sc_ah, rfilt);
dfs_reset_ar(sc);
dfs_reset_arq(sc);
}
}
void dfs_radar_task (unsigned long arg)
{
struct ath_dfs_host *dfs = (struct ath_dfs_host *)arg;
A_INT16 chan_index;
A_UINT8 bangradar;
//printk("\n%s\n",__func__);
if(dfs_process_radarevent_host(dfs, &chan_index, &bangradar)){
if(!bangradar){
DFS_DPRINTK(dfs, ATH_DEBUG_DFS, "%s: Radar detected on channel idx %d\n",
__func__, chan_index);
}
/* TODO: The radar detected event is sent from host in timer
* context which could potentially cause issues with sleepable
* WMI. Change this to process context later. */
DFS_RADAR_DETECTED(dfs->dev_hdl, chan_index, bangradar);
}
}
void
dfs_add_pulse(struct ath_softc *sc, struct dfs_filter *rf, struct dfs_event *re,
u_int32_t deltaT, u_int64_t this_ts)
{
u_int32_t index,n, window;
struct dfs_delayline *dl;
dl = &rf->rf_dl;
/* Circular buffer of size 2^n */
index = (dl->dl_lastelem + 1) & DFS_MAX_DL_MASK;
//if ((dl->dl_numelems+1) == DFS_MAX_DL_SIZE)
if ((dl->dl_numelems) == DFS_MAX_DL_SIZE)
dl->dl_firstelem = (dl->dl_firstelem + 1) & DFS_MAX_DL_MASK;
else
dl->dl_numelems++;
dl->dl_lastelem = index;
dl->dl_elems[index].de_time = deltaT;
dl->dl_elems[index].de_ts = this_ts;
window = deltaT;
dl->dl_elems[index].de_dur = re->re_dur;
dl->dl_elems[index].de_rssi = re->re_rssi;
for (n=0;n<dl->dl_numelems-1; n++) {
index = (index-1) & DFS_MAX_DL_MASK;
/*
* calculate window based on full time stamp instead of deltaT
* deltaT (de_time) may result in incorrect window value
*/
window = (u_int32_t) (this_ts - dl->dl_elems[index].de_ts);
if (window > rf->rf_filterlen) {
dl->dl_firstelem = (index+1) & DFS_MAX_DL_MASK;
dl->dl_numelems = n+1;
}
}
DFS_DPRINTK(sc, ATH_DEBUG_DFS2,
"dl firstElem = %d lastElem = %d\n",dl->dl_firstelem,
dl->dl_lastelem);
}
static void
radar_summary_print(struct ath_dfs *dfs, struct rx_radar_status *rsu)
{
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" pulsedur=%d\n", rsu->pulse_duration);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" rssi=%d\n", rsu->rssi);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" ischirp=%d\n", rsu->is_chirp);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" sidx=%d\n", rsu->sidx);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" raw tsf=%d\n", rsu->raw_tsf);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" tsf_offset=%d\n", rsu->tsf_offset);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" cooked tsf=%d\n", rsu->raw_tsf - rsu->tsf_offset);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
" frequency offset=%d.%d MHz (oversampling=%d)\n",
(int) (rsu->freq_offset / 1000),
(int) abs(rsu->freq_offset % 1000),
PERE_IS_OVERSAMPLING(dfs));
}
/*
* Clear all delay lines for all filter types
*/
void dfs_reset_alldelaylines(struct ath_softc *sc)
{
struct ath_dfs *dfs=sc->sc_dfs;
struct dfs_filtertype *ft = NULL;
struct dfs_filter *rf;
struct dfs_delayline *dl;
struct dfs_pulseline *pl;
int i,j;
if (dfs == NULL) {
DFS_DPRINTK(sc, ATH_DEBUG_DFS, "%s: sc_dfs is NULL\n", __func__);
return;
}
pl = dfs->pulses;
/* reset the pulse log */
pl->pl_firstelem = pl->pl_numelems = 0;
pl->pl_lastelem = DFS_MAX_PULSE_BUFFER_MASK;
for (i=0; i<DFS_MAX_RADAR_TYPES; i++) {
if (dfs->dfs_radarf[i] != NULL) {
ft = dfs->dfs_radarf[i];
for (j=0; j<ft->ft_numfilters; j++) {
rf = &(ft->ft_filters[j]);
dl = &(rf->rf_dl);
if(dl != NULL) {
OS_MEMZERO(dl, sizeof(struct dfs_delayline));
dl->dl_lastelem = (0xFFFFFFFF) & DFS_MAX_DL_MASK;
}
}
}
}
for (i=0; i<dfs->dfs_rinfo.rn_numbin5radars; i++) {
OS_MEMZERO(&(dfs->dfs_b5radars[i].br_elems[0]), sizeof(struct dfs_bin5elem)*DFS_MAX_B5_SIZE);
dfs->dfs_b5radars[i].br_firstelem = 0;
dfs->dfs_b5radars[i].br_numelems = 0;
dfs->dfs_b5radars[i].br_lastelem = (0xFFFFFFFF)&DFS_MAX_B5_MASK;
}
}
void
dfs_get_nol(struct ath_dfs *dfs, struct dfsreq_nolelem *dfs_nol,
int *nchan)
{
struct dfs_nolelem *nol;
*nchan = 0;
if (dfs == NULL) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_NOL, "%s: sc_dfs is NULL\n", __func__);
return;
}
nol = dfs->dfs_nol;
while (nol != NULL) {
dfs_nol[*nchan].nol_freq = nol->nol_freq;
dfs_nol[*nchan].nol_chwidth = nol->nol_chwidth;
dfs_nol[*nchan].nol_start_ticks = nol->nol_start_ticks;
dfs_nol[*nchan].nol_timeout_ms = nol->nol_timeout_ms;
++(*nchan);
nol = nol->nol_next;
}
}
void
dfs_process_phyerr(struct ieee80211com *ic, void *buf, uint16_t datalen,
uint8_t r_rssi, uint8_t r_ext_rssi, uint32_t r_rs_tstamp,
uint64_t r_fulltsf, bool enable_log)
{
struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
struct dfs_ieee80211_channel *chan = ic->ic_curchan;
struct dfs_event *event;
struct dfs_phy_err e;
int empty;
if (dfs == NULL) {
CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR,
"%s: sc_dfs is NULL\n", __func__);
return;
}
dfs->dfs_phyerr_count++;
dump_phyerr_contents(buf, datalen);
/*
* XXX The combined_rssi_ok support has been removed.
* This was only clear for Owl.
*
* XXX TODO: re-add this; it requires passing in the ctl/ext
* RSSI set from the RX status descriptor.
*
* XXX TODO TODO: this may be done for us from the legacy
* phy error path in ath_dev; please review that code.
*/
/*
* At this time we have a radar pulse that we need to examine and
* queue. But if dfs_process_radarevent already detected radar and set
* CHANNEL_INTERFERENCE flag then do not queue any more radar data.
* When we are in a new channel this flag will be clear and we will
* start queueing data for new channel. (EV74162)
*/
if (dfs->dfs_debug_mask & ATH_DEBUG_DFS_PHYERR_PKT)
dump_phyerr_contents(buf, datalen);
if (chan == NULL) {
CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR,
"%s: chan is NULL\n", __func__);
return;
}
cdf_spin_lock_bh(&ic->chan_lock);
if (IEEE80211_IS_CHAN_RADAR(chan)) {
cdf_spin_unlock_bh(&ic->chan_lock);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS1,
"%s: Radar already found in the channel, "
" do not queue radar data\n", __func__);
return;
}
cdf_spin_unlock_bh(&ic->chan_lock);
dfs->ath_dfs_stats.total_phy_errors++;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"%s[%d] phyerr %d len %d\n",
__func__, __LINE__,
dfs->ath_dfs_stats.total_phy_errors, datalen);
/*
* hardware stores this as 8 bit signed value.
* we will cap it at 0 if it is a negative number
*/
if (r_rssi & 0x80)
r_rssi = 0;
if (r_ext_rssi & 0x80)
r_ext_rssi = 0;
OS_MEMSET(&e, 0, sizeof(e));
/*
* This is a bit evil - instead of just passing in
* the chip version, the existing code uses a set
* of HAL capability bits to determine what is
* possible.
*
* The way I'm decoding it is thus:
*
* + DFS enhancement? Merlin or later
* + DFS extension channel? Sowl or later. (Howl?)
* + otherwise, Owl (and legacy.)
*/
if (dfs->dfs_caps.ath_chip_is_bb_tlv) {
if (dfs_process_phyerr_bb_tlv(dfs, buf, datalen, r_rssi,
r_ext_rssi, r_rs_tstamp,
r_fulltsf, &e,
enable_log) == 0) {
dfs->dfs_phyerr_reject_count++;
return;
} else {
if (dfs->dfs_phyerr_freq_min > e.freq)
dfs->dfs_phyerr_freq_min = e.freq;
if (dfs->dfs_phyerr_freq_max < e.freq)
dfs->dfs_phyerr_freq_max = e.freq;
}
} else if (dfs->dfs_caps.ath_dfs_use_enhancement) {
if (dfs_process_phyerr_merlin(dfs, buf, datalen, r_rssi,
r_ext_rssi, r_rs_tstamp,
r_fulltsf, &e) == 0) {
return;
}
} else if (dfs->dfs_caps.ath_dfs_ext_chan_ok) {
if (dfs_process_phyerr_sowl(dfs, buf, datalen, r_rssi,
r_ext_rssi, r_rs_tstamp, r_fulltsf,
&e) == 0) {
return;
}
} else {
if (dfs_process_phyerr_owl(dfs, buf, datalen, r_rssi,
r_ext_rssi, r_rs_tstamp, r_fulltsf,
&e) == 0) {
return;
}
}
CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO,
"\n %s: Frequency at which the phyerror was injected = %d",
__func__, e.freq);
/*
* If the hardware supports radar reporting on the extension channel
* it will supply FFT data for longer radar pulses.
*
* TLV chips don't go through this software check - the hardware
* check should be enough. If we want to do software checking
* later on then someone will have to craft an FFT parser
* suitable for the TLV FFT data format.
*/
if ((!dfs->dfs_caps.ath_chip_is_bb_tlv) &&
dfs->dfs_caps.ath_dfs_ext_chan_ok) {
/*
* HW has a known issue with chirping pulses injected at or
* around DC in 40MHz mode. Such pulses are reported with
* much lower durations and SW then discards them because
* they do not fit the minimum bin5 pulse duration.
*
* To work around this issue, if a pulse is within a 10us
* range of the bin5 min duration, check if the pulse is
* chirping. If the pulse is chirping, bump up the duration
* to the minimum bin5 duration.
*
* This makes sure that a valid chirping pulse will not be
* discarded because of incorrect low duration.
*
* TBD - Is it possible to calculate the 'real' duration of
* the pulse using the slope of the FFT data?
*
* TBD - Use FFT data to differentiate between radar pulses
* and false PHY errors.
* This will let us reduce the number of false alarms seen.
*
* BIN 5 chirping pulses are only for FCC or Japan MMK4 domain
*/
if (((dfs->dfsdomain == DFS_FCC_DOMAIN) ||
(dfs->dfsdomain == DFS_MKK4_DOMAIN)) &&
(e.dur >= MAYBE_BIN5_DUR) && (e.dur < MAX_BIN5_DUR)) {
int add_dur;
int slope = 0, dc_found = 0;
/*
* Set the event chirping flags; as we're doing
* an actual chirp check.
*/
e.do_check_chirp = 1;
e.is_hw_chirp = 0;
e.is_sw_chirp = 0;
/*
* dfs_check_chirping() expects is_pri and is_ext
* to be '1' for true and '0' for false for now,
* as the function itself uses these values in
* constructing things rather than testing them
* for 'true' or 'false'.
*/
add_dur = dfs_check_chirping(dfs, buf, datalen,
(e.is_pri ? 1 : 0),
(e.is_ext ? 1 : 0),
&slope, &dc_found);
if (add_dur) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
"old dur %d slope =%d\n", e.dur,
slope);
e.is_sw_chirp = 1;
/* bump up to a random bin5 pulse duration */
if (e.dur < MIN_BIN5_DUR) {
e.dur = dfs_get_random_bin5_dur(dfs,
e.fulltsf);
}
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
"new dur %d\n", e.dur);
} else {
/* set the duration so that it is rejected */
e.is_sw_chirp = 0;
e.dur = MAX_BIN5_DUR + 100;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
"is_chirping = %d dur=%d\n",
add_dur, e.dur);
}
} else {
/*
* We have a pulse that is either bigger than
* MAX_BIN5_DUR or * less than MAYBE_BIN5_DUR
*/
if ((dfs->dfsdomain == DFS_FCC_DOMAIN) ||
(dfs->dfsdomain == DFS_MKK4_DOMAIN)) {
/*
* XXX Would this result in very large pulses
* wrapping around to become short pulses?
*/
if (e.dur >= MAX_BIN5_DUR) {
/*
* set the duration so that it is
* rejected
*/
e.dur = MAX_BIN5_DUR + 50;
}
}
}
}
/*
* Add the parsed, checked and filtered entry to the radar pulse
* event list. This is then checked by dfs_radar_processevent().
*
* XXX TODO: some filtering is still done below this point - fix
* XXX this!
*/
ATH_DFSEVENTQ_LOCK(dfs);
empty = STAILQ_EMPTY(&(dfs->dfs_eventq));
ATH_DFSEVENTQ_UNLOCK(dfs);
if (empty) {
return;
}
/*
* If the channel is a turbo G channel, then the event is
* for the adaptive radio (AR) pattern matching rather than
* radar detection.
*/
cdf_spin_lock_bh(&ic->chan_lock);
if ((chan->ic_flags & CHANNEL_108G) == CHANNEL_108G) {
cdf_spin_unlock_bh(&ic->chan_lock);
if (!(dfs->dfs_proc_phyerr & DFS_AR_EN)) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"%s: DFS_AR_EN not enabled\n", __func__);
return;
}
ATH_DFSEVENTQ_LOCK(dfs);
event = STAILQ_FIRST(&(dfs->dfs_eventq));
if (event == NULL) {
ATH_DFSEVENTQ_UNLOCK(dfs);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS,
"%s: no more events space left\n",
__func__);
return;
}
STAILQ_REMOVE_HEAD(&(dfs->dfs_eventq), re_list);
ATH_DFSEVENTQ_UNLOCK(dfs);
event->re_rssi = e.rssi;
event->re_dur = e.dur;
event->re_full_ts = e.fulltsf;
event->re_ts = (e.rs_tstamp) & DFS_TSMASK;
event->re_chanindex = dfs->dfs_curchan_radindex;
event->re_flags = 0;
event->sidx = e.sidx;
/*
* Handle chirp flags.
*/
if (e.do_check_chirp) {
event->re_flags |= DFS_EVENT_CHECKCHIRP;
if (e.is_hw_chirp)
event->re_flags |= DFS_EVENT_HW_CHIRP;
if (e.is_sw_chirp)
event->re_flags |= DFS_EVENT_SW_CHIRP;
}
ATH_ARQ_LOCK(dfs);
STAILQ_INSERT_TAIL(&(dfs->dfs_arq), event, re_list);
ATH_ARQ_UNLOCK(dfs);
} else {
if (IEEE80211_IS_CHAN_DFS(chan)) {
cdf_spin_unlock_bh(&ic->chan_lock);
if (!(dfs->dfs_proc_phyerr & DFS_RADAR_EN)) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS3,
"%s: DFS_RADAR_EN not enabled\n",
__func__);
return;
}
/*
* rssi is not accurate for short pulses, so do
* not filter based on that for short duration pulses
*
* XXX do this filtering above?
*/
if (dfs->dfs_caps.ath_dfs_ext_chan_ok) {
if ((e.rssi < dfs->dfs_rinfo.rn_minrssithresh &&
(e.dur > 4)) ||
e.dur > (dfs->dfs_rinfo.rn_maxpulsedur)) {
dfs->ath_dfs_stats.rssi_discards++;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS1,
"Extension channel pulse is "
"discarded: dur=%d, "
"maxpulsedur=%d, rssi=%d, "
"minrssi=%d\n",
e.dur,
dfs->dfs_rinfo.
rn_maxpulsedur, e.rssi,
dfs->dfs_rinfo.
rn_minrssithresh);
return;
}
} else {
if (e.rssi < dfs->dfs_rinfo.rn_minrssithresh ||
e.dur > dfs->dfs_rinfo.rn_maxpulsedur) {
/* XXX TODO add a debug statement? */
dfs->ath_dfs_stats.rssi_discards++;
return;
}
}
/*
* Add the event to the list, if there's space.
*/
ATH_DFSEVENTQ_LOCK(dfs);
event = STAILQ_FIRST(&(dfs->dfs_eventq));
if (event == NULL) {
ATH_DFSEVENTQ_UNLOCK(dfs);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS,
"%s: no more events space left\n",
__func__);
return;
}
STAILQ_REMOVE_HEAD(&(dfs->dfs_eventq), re_list);
ATH_DFSEVENTQ_UNLOCK(dfs);
dfs->dfs_phyerr_queued_count++;
dfs->dfs_phyerr_w53_counter++;
event->re_dur = e.dur;
event->re_full_ts = e.fulltsf;
event->re_ts = (e.rs_tstamp) & DFS_TSMASK;
event->re_rssi = e.rssi;
event->sidx = e.sidx;
/*
* Handle chirp flags.
*/
if (e.do_check_chirp) {
event->re_flags |= DFS_EVENT_CHECKCHIRP;
if (e.is_hw_chirp)
event->re_flags |= DFS_EVENT_HW_CHIRP;
if (e.is_sw_chirp)
event->re_flags |= DFS_EVENT_SW_CHIRP;
}
/*
* Correctly set which channel is being reported on
*/
if (e.is_pri) {
event->re_chanindex = dfs->dfs_curchan_radindex;
} else {
if (dfs->dfs_extchan_radindex == -1) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
"%s - phyerr on ext channel\n",
__func__);
}
event->re_chanindex = dfs->dfs_extchan_radindex;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS_PHYERR,
"%s New extension channel event is added "
"to queue\n", __func__);
}
ATH_DFSQ_LOCK(dfs);
STAILQ_INSERT_TAIL(&(dfs->dfs_radarq), event, re_list);
ATH_DFSQ_UNLOCK(dfs);
} else {
cdf_spin_unlock_bh(&ic->chan_lock);
}
}
/*
* Schedule the radar/AR task as appropriate.
*
* XXX isn't a lock needed for ath_radar_tasksched?
*/
/*
* Commenting out the dfs_process_ar_event() since the function is never
* called at run time as dfs_arq will be empty and the function
* dfs_process_ar_event is obsolete and function definition is removed
* as part of dfs_ar.c file
*
* if (!STAILQ_EMPTY(&dfs->dfs_arq))
* // XXX shouldn't this be a task/timer too?
* dfs_process_ar_event(dfs, ic->ic_curchan);
*/
if (!STAILQ_EMPTY(&dfs->dfs_radarq) && !dfs->ath_radar_tasksched) {
dfs->ath_radar_tasksched = 1;
OS_SET_TIMER(&dfs->ath_dfs_task_timer, 0);
}
#undef EXT_CH_RADAR_FOUND
#undef PRI_CH_RADAR_FOUND
#undef EXT_CH_RADAR_EARLY_FOUND
}
int dfs_bin_pri_check(struct ath_dfs_host *dfs, struct dfs_filter *rf,
struct dfs_delayline *dl, u_int32_t score,
u_int32_t refpri, u_int32_t refdur, int ext_chan_flag, u_int32_t ext_chan_busy)
{
u_int32_t searchpri, searchdur, searchrssi, deltapri, deltadur, averagerefpri=0;
int primultiples[6];
int delayindex, dindex;
u_int32_t i, j, primargin, durmargin, highscore=score, highscoreindex=0;
int numpulses=1; /*first pulse in the burst is most likely being filtered out based on maxfilterlen */
/*Use the adjusted PRI margin to reduce false alarms */
/* For non fixed pattern types, rf->rf_patterntype=0*/
primargin = dfs_get_pri_margin(ext_chan_flag, (rf->rf_patterntype==1),
dfs->dfs_rinfo.rn_lastfull_ts, ext_chan_busy);
if(rf->rf_maxdur < 10) {
durmargin = 4;
}
else {
durmargin = 6;
}
if( score > 1) {
for (i=0;i<dl->dl_numelems; i++) {
dindex = (dl->dl_firstelem + i) & DFS_MAX_DL_MASK;
searchpri = dl->dl_elems[dindex].de_time;
deltapri = DFS_DIFF(searchpri, refpri);
if( deltapri < primargin)
averagerefpri += searchpri;
}
refpri = (averagerefpri/score); /*average */
}
/* Note: Following primultiple calculation should be done once per filter
* during initialization stage (dfs_attach) and stored in its array
* atleast for fixed frequency types like FCC Bin1 to save some CPU cycles.
* multiplication, devide operators in the following code are left as it is
* for readability hoping the complier will use left/right shifts wherever possible
*/
if( refpri > rf->rf_maxpri) {
primultiples[0] = (refpri - refdur)/2;
primultiples[1] = refpri;
primultiples[2] = refpri + primultiples[0];
primultiples[3] = (refpri - refdur)*2;
primultiples[4] = primultiples[3] + primultiples[0];
primultiples[5] = primultiples[3] + refpri;
}
else {
primultiples[0] = refpri;
primultiples[1] = refpri + primultiples[0];
primultiples[2] = refpri + primultiples[1];
primultiples[3] = refpri + primultiples[2];
primultiples[4] = refpri + primultiples[3];
primultiples[5] = refpri + primultiples[4];
}
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"pri0 = %d pri1 = %d pri2 = %d pri3 = %d pri4 = %d pri5 = %d\n",
primultiples[0], primultiples[1], primultiples[2],
primultiples[3], primultiples[4], primultiples[5]);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"refpri = %d high score = %d index = %d numpulses = %d\n",
refpri, highscore, highscoreindex, numpulses);
/* Count the other delay elements that have pri and dur with in the
* acceptable range from the reference one */
for (i=0; i<dl->dl_numelems; i++) {
delayindex = (dl->dl_firstelem + i) & DFS_MAX_DL_MASK;
searchpri = dl->dl_elems[delayindex].de_time;
if( searchpri == 0) {
/* This events PRI is zero, take it as a
* valid pulse but decrement next event's PRI by refpri
*/
dindex = (delayindex+1)& DFS_MAX_DL_MASK;
dl->dl_elems[dindex].de_time -= refpri;
searchpri = refpri;
}
searchdur = dl->dl_elems[delayindex].de_dur;
searchrssi = dl->dl_elems[delayindex].de_rssi;
deltadur = DFS_DIFF(searchdur, refdur);
for(j=0; j<6; j++) {
deltapri = DFS_DIFF(searchpri, primultiples[j]);
/* May need to revisit this as this increases the primargin by 5*/
/* if( deltapri < (primargin+j)) { */
if( deltapri < (primargin)) {
if( deltadur < durmargin) {
if( (refdur < 8) || ((refdur >=8)&&
(searchrssi < 250))) {
numpulses++;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"rf->minpri=%d rf->maxpri=%d searchpri = %d index = %d numpulses = %d deltapri=%d j=%d\n",
rf->rf_minpri, rf->rf_maxpri, searchpri, i, numpulses, deltapri, j);
}
}
break;
}
}
}
return numpulses;
}
int dfs_bin_fixedpattern_check(struct ath_dfs_host *dfs, struct dfs_filter *rf, u_int32_t dur, int ext_chan_flag, u_int32_t ext_chan_busy)
{
struct dfs_pulseline *pl = dfs->pulses;
int i, n, refpri, primargin, numpulses=0;
u_int64_t start_ts, end_ts, event_ts, prev_event_ts, next_event_ts, window_start, window_end;
u_int32_t index, next_index, deltadur;
/* For fixed pattern types, rf->rf_patterntype=1*/
primargin = dfs_get_pri_margin(ext_chan_flag, (rf->rf_patterntype==1),dfs->dfs_rinfo.rn_lastfull_ts, ext_chan_busy);
refpri = (rf->rf_minpri + rf->rf_maxpri)/2;
index = pl->pl_lastelem;
end_ts = pl->pl_elems[index].p_time;
start_ts = end_ts - (refpri*rf->rf_numpulses);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS3, "lastelem ts=%llu start_ts=%llu, end_ts=%llu\n", (unsigned long long)pl->pl_elems[index].p_time, (unsigned long long)start_ts, (unsigned long long)end_ts);
/* find the index of first element in our window of interest */
for(i=0;i<pl->pl_numelems;i++) {
index = (index-1) & DFS_MAX_PULSE_BUFFER_MASK;
if(pl->pl_elems[index].p_time >= start_ts )
continue;
else {
index = (index) & DFS_MAX_PULSE_BUFFER_MASK;
break;
}
}
for (n=0;n<=rf->rf_numpulses; n++) {
window_start = (start_ts + (refpri*n))-(primargin+n);
window_end = window_start + 2*(primargin+n);
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"window_start %u window_end %u \n",
(u_int32_t)window_start, (u_int32_t)window_end);
for(i=0;i<pl->pl_numelems;i++) {
prev_event_ts = pl->pl_elems[index].p_time;
index = (index+1) & DFS_MAX_PULSE_BUFFER_MASK;
event_ts = pl->pl_elems[index].p_time;
next_index = (index+1) & DFS_MAX_PULSE_BUFFER_MASK;
next_event_ts = pl->pl_elems[next_index].p_time;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"ts %u \n", (u_int32_t)event_ts);
if( (event_ts <= window_end) && (event_ts >= window_start)){
deltadur = DFS_DIFF(pl->pl_elems[index].p_dur, dur);
if( (pl->pl_elems[index].p_dur == 1) ||
((dur != 1) && (deltadur <= 2))) {
numpulses++;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"numpulses %u \n", numpulses);
break;
}
}
else if( event_ts > window_end) {
index = (index-1) & DFS_MAX_PULSE_BUFFER_MASK;
break;
}
else if( event_ts == prev_event_ts) {
if( ((next_event_ts - event_ts) > refpri) ||
((next_event_ts - event_ts) == 0)) {
deltadur = DFS_DIFF(pl->pl_elems[index].p_dur, dur);
if( (pl->pl_elems[index].p_dur == 1) ||
((pl->pl_elems[index].p_dur != 1) && (deltadur <= 2))) {
numpulses++;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS2,
"zero PRI: numpulses %u \n", numpulses);
break;
}
}
}
}
}
if (numpulses >= dfs_get_filter_threshold(rf, ext_chan_flag, dfs->dfs_rinfo.rn_lastfull_ts, ext_chan_busy)) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS1, "%s FOUND filterID=%u numpulses=%d unadj thresh=%d\n", __func__, rf->rf_pulseid, numpulses, rf->rf_threshold);
return 1;
}
else
return 0;
}
int dfs_bin_check(struct ath_dfs_host *dfs, struct dfs_filter *rf,
u_int32_t deltaT, u_int32_t width, int ext_chan_flag, u_int32_t ext_chan_busy)
{
u_int32_t refpri, refdur, searchpri, deltapri, averagerefpri;
u_int32_t n, i, primargin, durmargin, highscore, highscoreindex;
int score[DFS_MAX_DL_SIZE], delayindex, dindex, found=0;
struct dfs_delayline *dl;
u_int32_t scoreindex, lowpriindex= 0, lowpri = 0xffff;
int numpulses=0;
dl = &rf->rf_dl;
if( dl->dl_numelems < (rf->rf_threshold-1)) {
return 0;
}
if( deltaT > rf->rf_filterlen)
return 0;
primargin = dfs_get_pri_margin(ext_chan_flag, (rf->rf_patterntype==1),
dfs->dfs_rinfo.rn_lastfull_ts, ext_chan_busy);
if(rf->rf_maxdur < 10) {
durmargin = 4;
}
else {
durmargin = 6;
}
if( rf->rf_patterntype == 1 ){
found = dfs_bin_fixedpattern_check(dfs, rf, width, ext_chan_flag, ext_chan_busy);
if(found) {
dl->dl_numelems = 0;
}
return found;
}
OS_MEMZERO(score, sizeof(int)*DFS_MAX_DL_SIZE);
/* find out the lowest pri */
for (n=0;n<dl->dl_numelems; n++) {
delayindex = (dl->dl_firstelem + n) & DFS_MAX_DL_MASK;
refpri = dl->dl_elems[delayindex].de_time;
if( refpri == 0)
continue;
else if(refpri < lowpri) {
lowpri = dl->dl_elems[delayindex].de_time;
lowpriindex = n;
}
}
/* find out the each delay element's pri score */
for (n=0;n<dl->dl_numelems; n++) {
delayindex = (dl->dl_firstelem + n) & DFS_MAX_DL_MASK;
refpri = dl->dl_elems[delayindex].de_time;
if( refpri == 0)
continue;
for (i=0;i<dl->dl_numelems; i++) {
dindex = (dl->dl_firstelem + i) & DFS_MAX_DL_MASK;
searchpri = dl->dl_elems[dindex].de_time;
deltapri = DFS_DIFF(searchpri, refpri);
if( deltapri < primargin)
score[n]++;
}
if( score[n] > rf->rf_threshold) {
/* we got the most possible candidate,
* no need to continue further */
break;
}
}
/* find out the high scorer */
highscore = 0;
highscoreindex = 0;
for (n=0;n<dl->dl_numelems; n++) {
if( score[n] > highscore) {
highscore = score[n];
highscoreindex = n;
}
else if( score[n] == highscore ) {
/*more than one pri has highscore take the least pri */
delayindex = (dl->dl_firstelem + highscoreindex) & DFS_MAX_DL_MASK;
dindex = (dl->dl_firstelem + n) & DFS_MAX_DL_MASK;
if( dl->dl_elems[dindex].de_time <=
dl->dl_elems[delayindex].de_time ) {
highscoreindex = n;
}
}
}
/* find the average pri of pulses around the pri of highscore or
* the pulses around the lowest pri */
if( highscore < 3) {
scoreindex = lowpriindex;
}
else {
scoreindex = highscoreindex;
}
/* We got the possible pri, save its parameters as reference */
delayindex = (dl->dl_firstelem + scoreindex) & DFS_MAX_DL_MASK;
refdur = dl->dl_elems[delayindex].de_dur;
refpri = dl->dl_elems[delayindex].de_time;
averagerefpri = 0;
numpulses = dfs_bin_pri_check(dfs, rf, dl, score[scoreindex], refpri, refdur, ext_chan_flag, ext_chan_busy);
if (numpulses >= dfs_get_filter_threshold(rf, ext_chan_flag, dfs->dfs_rinfo.rn_lastfull_ts, ext_chan_busy)) {
found = 1;
DFS_DPRINTK(dfs, ATH_DEBUG_DFS1, "ext_flag=%d MATCH filter=%u numpulses=%u thresh=%u refpri=%d primargin=%d\n", ext_chan_flag, rf->rf_pulseid, numpulses,rf->rf_threshold, refpri, primargin);
dfs_print_delayline(dfs, &rf->rf_dl);
dfs_print_filter(dfs, rf);
}
return found;
}
/* This function Initialize the radar filter tables
* if the ath dfs domain is uninitalized or
* ath dfs domain is different from hal dfs domain
*/
int dfs_init_radar_filters(struct ieee80211com *ic,
struct ath_dfs_radar_tab_info *radar_info)
{
u_int32_t T, Tmax;
int numpulses,p,n, i;
int numradars = 0, numb5radars = 0;
struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
struct dfs_filtertype *ft = NULL;
struct dfs_filter *rf=NULL;
struct dfs_pulse *dfs_radars;
struct dfs_bin5pulse *b5pulses=NULL;
int32_t min_rssithresh=DFS_MAX_RSSI_VALUE;
u_int32_t max_pulsedur=0;
if (dfs == NULL) {
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_ERROR,
"%s[%d]: dfs is NULL", __func__, __LINE__);
return DFS_STATUS_FAIL;
}
/* clear up the dfs domain flag first */
#ifndef ATH_DFS_RADAR_DETECTION_ONLY
dfs->ath_dfs_isdfsregdomain = 0;
#endif
/*
* If radar_info is NULL or dfsdomain is NULL, treat
* the rest of the radar configuration as suspect.
*/
if (radar_info == NULL || radar_info->dfsdomain == 0) {
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_ERROR,
"%s[%d]: Unknown dfs domain %d ",
__func__, __LINE__, dfs->dfsdomain);
/* Disable radar detection since we don't have a radar domain */
dfs->dfs_proc_phyerr &= ~DFS_RADAR_EN;
/* Returning success though we are not completing init. A failure
* will fail dfs_attach also.
*/
return DFS_STATUS_SUCCESS;
}
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_INFO,
"%s[%d]:dfsdomain=%d, numradars=%d, numb5radars=%d",
__func__, __LINE__, radar_info->dfsdomain,
radar_info->numradars, radar_info->numb5radars);
dfs->dfsdomain = radar_info->dfsdomain;
dfs_radars = radar_info->dfs_radars;
numradars = radar_info->numradars;
b5pulses = radar_info->b5pulses;
numb5radars = radar_info->numb5radars;
/* XXX this should be an explicit copy of some sort! */
dfs->dfs_defaultparams = radar_info->dfs_defaultparams;
#ifndef ATH_DFS_RADAR_DETECTION_ONLY
dfs->ath_dfs_isdfsregdomain = 1;
#endif
dfs->dfs_rinfo.rn_numradars = 0;
/* Clear filter type table */
for (n = 0; n < 256; n++) {
for (i=0;i<DFS_MAX_RADAR_OVERLAP; i++)
(dfs->dfs_radartable[n])[i] = -1;
}
/* Now, initialize the radar filters */
for (p=0; p<numradars; p++) {
ft = NULL;
for (n=0; n<dfs->dfs_rinfo.rn_numradars; n++) {
if ((dfs_radars[p].rp_pulsedur == dfs->dfs_radarf[n]->ft_filterdur) &&
(dfs_radars[p].rp_numpulses == dfs->dfs_radarf[n]->ft_numpulses) &&
(dfs_radars[p].rp_mindur == dfs->dfs_radarf[n]->ft_mindur) &&
(dfs_radars[p].rp_maxdur == dfs->dfs_radarf[n]->ft_maxdur)) {
ft = dfs->dfs_radarf[n];
break;
}
}
if (ft == NULL) {
/* No filter of the appropriate dur was found */
if ((dfs->dfs_rinfo.rn_numradars+1) >DFS_MAX_RADAR_TYPES) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS, "%s: Too many filter types",
__func__);
goto bad4;
}
ft = dfs->dfs_radarf[dfs->dfs_rinfo.rn_numradars];
ft->ft_numfilters = 0;
ft->ft_numpulses = dfs_radars[p].rp_numpulses;
ft->ft_patterntype = dfs_radars[p].rp_patterntype;
ft->ft_mindur = dfs_radars[p].rp_mindur;
ft->ft_maxdur = dfs_radars[p].rp_maxdur;
ft->ft_filterdur = dfs_radars[p].rp_pulsedur;
ft->ft_rssithresh = dfs_radars[p].rp_rssithresh;
ft->ft_rssimargin = dfs_radars[p].rp_rssimargin;
ft->ft_minpri = 1000000;
if (ft->ft_rssithresh < min_rssithresh)
min_rssithresh = ft->ft_rssithresh;
if (ft->ft_maxdur > max_pulsedur)
max_pulsedur = ft->ft_maxdur;
for (i=ft->ft_mindur; i<=ft->ft_maxdur; i++) {
u_int32_t stop=0,tableindex=0;
while ((tableindex < DFS_MAX_RADAR_OVERLAP) && (!stop)) {
if ((dfs->dfs_radartable[i])[tableindex] == -1)
stop = 1;
else
tableindex++;
}
if (stop) {
(dfs->dfs_radartable[i])[tableindex] =
(int8_t) (dfs->dfs_rinfo.rn_numradars);
} else {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS,
"%s: Too many overlapping radar filters",
__func__);
goto bad4;
}
}
dfs->dfs_rinfo.rn_numradars++;
}
rf = &(ft->ft_filters[ft->ft_numfilters++]);
dfs_reset_delayline(&rf->rf_dl);
numpulses = dfs_radars[p].rp_numpulses;
rf->rf_numpulses = numpulses;
rf->rf_patterntype = dfs_radars[p].rp_patterntype;
rf->rf_pulseid = dfs_radars[p].rp_pulseid;
rf->rf_mindur = dfs_radars[p].rp_mindur;
rf->rf_maxdur = dfs_radars[p].rp_maxdur;
rf->rf_numpulses = dfs_radars[p].rp_numpulses;
rf->rf_ignore_pri_window = dfs_radars[p].rp_ignore_pri_window;
T = (100000000/dfs_radars[p].rp_max_pulsefreq) -
100*(dfs_radars[p].rp_meanoffset);
rf->rf_minpri =
dfs_round((int32_t)T - (100*(dfs_radars[p].rp_pulsevar)));
Tmax = (100000000/dfs_radars[p].rp_pulsefreq) -
100*(dfs_radars[p].rp_meanoffset);
rf->rf_maxpri =
dfs_round((int32_t)Tmax + (100*(dfs_radars[p].rp_pulsevar)));
if( rf->rf_minpri < ft->ft_minpri )
ft->ft_minpri = rf->rf_minpri;
rf->rf_fixed_pri_radar_pulse = ( dfs_radars[p].rp_max_pulsefreq == dfs_radars[p].rp_pulsefreq ) ? 1 : 0;
rf->rf_threshold = dfs_radars[p].rp_threshold;
rf->rf_filterlen = rf->rf_maxpri * rf->rf_numpulses;
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_INFO, "%s[%d]: minprf = %d maxprf = %d pulsevar = %d thresh=%d",
__func__,__LINE__,dfs_radars[p].rp_pulsefreq, dfs_radars[p].rp_max_pulsefreq,
dfs_radars[p].rp_pulsevar, rf->rf_threshold);
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_INFO, "%s[%d]:minpri = %d maxpri = %d filterlen = %d filterID = %d",__func__,__LINE__,
rf->rf_minpri, rf->rf_maxpri, rf->rf_filterlen, rf->rf_pulseid);
}
#ifdef DFS_DEBUG
dfs_print_filters(ic);
#endif
dfs->dfs_rinfo.rn_numbin5radars = numb5radars;
if (dfs->dfs_b5radars != NULL)
OS_FREE(dfs->dfs_b5radars);
dfs->dfs_b5radars = (struct dfs_bin5radars *)OS_MALLOC(NULL,
numb5radars * sizeof(struct dfs_bin5radars), GFP_KERNEL);
if (dfs->dfs_b5radars == NULL) {
DFS_DPRINTK(dfs, ATH_DEBUG_DFS,
"%s: cannot allocate memory for bin5 radars",
__func__);
goto bad4;
}
for (n=0; n<numb5radars; n++) {
dfs->dfs_b5radars[n].br_pulse = b5pulses[n];
dfs->dfs_b5radars[n].br_pulse.b5_timewindow *= 1000000;
if (dfs->dfs_b5radars[n].br_pulse.b5_rssithresh < min_rssithresh)
min_rssithresh = dfs->dfs_b5radars[n].br_pulse.b5_rssithresh;
if (dfs->dfs_b5radars[n].br_pulse.b5_maxdur > max_pulsedur)
max_pulsedur = dfs->dfs_b5radars[n].br_pulse.b5_maxdur;
}
dfs_reset_alldelaylines(dfs);
dfs_reset_radarq(dfs);
dfs->dfs_curchan_radindex = -1;
dfs->dfs_extchan_radindex = -1;
dfs->dfs_rinfo.rn_minrssithresh = min_rssithresh;
/* Convert durations to TSF ticks */
dfs->dfs_rinfo.rn_maxpulsedur = dfs_round((int32_t)((max_pulsedur*100/80)*100));
/* relax the max pulse duration a little bit due to inaccuracy caused by chirping. */
dfs->dfs_rinfo.rn_maxpulsedur = dfs->dfs_rinfo.rn_maxpulsedur +20;
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_INFO,
"%s[%d]: DFS min filter rssiThresh = %d",
__func__, __LINE__, min_rssithresh);
VOS_TRACE(VOS_MODULE_ID_SAP, VOS_TRACE_LEVEL_INFO,
"%s[%d]:DFS max pulse dur = %d ticks",
__func__ ,__LINE__, dfs->dfs_rinfo.rn_maxpulsedur);
return DFS_STATUS_SUCCESS;
bad4:
return DFS_STATUS_FAIL;
}
int
dfs_process_radarevent(struct ath_softc *sc, HAL_CHANNEL *chan)
{
struct ath_dfs *dfs=sc->sc_dfs;
struct ath_hal *ah=sc->sc_ah;
struct dfs_event re,*event;
struct dfs_state *rs=NULL;
struct dfs_filtertype *ft;
struct dfs_filter *rf;
int found, retval = 0, p, empty;
int events_processed = 0;
u_int32_t tabledepth, rfilt, index;
u_int64_t deltafull_ts = 0, this_ts, deltaT;
HAL_CHANNEL *thischan;
HAL_PHYERR_PARAM pe;
struct dfs_pulseline *pl;
static u_int32_t test_ts = 0;
static u_int32_t diff_ts = 0;
int ext_chan_event_flag = 0;
if (dfs == NULL) {
DFS_DPRINTK(sc, ATH_DEBUG_DFS, "%s: sc_sfs is NULL\n",
__func__);
return 0;
}
pl = dfs->pulses;
if ( ! (sc->sc_curchan.priv_flags & CHANNEL_DFS)) {
DFS_DPRINTK(sc, ATH_DEBUG_DFS2, "%s: radar event on non-DFS chan\n",
__func__);
dfs_reset_radarq(sc);
dfs_reset_alldelaylines(sc);
return 0;
}
#ifndef ATH_DFS_RADAR_DETECTION_ONLY
/* TEST : Simulate radar bang, make sure we add the channel to NOL (bug 29968) */
if (dfs->dfs_bangradar) {
/* bangradar will always simulate radar found on the primary channel */
rs = &dfs->dfs_radar[dfs->dfs_curchan_radindex];
dfs->dfs_bangradar = 0; /* reset */
DFS_DPRINTK(sc, ATH_DEBUG_DFS, "%s: bangradar\n", __func__);
retval = 1;
goto dfsfound;
}
#endif
ATH_DFSQ_LOCK(dfs);
empty = STAILQ_EMPTY(&(dfs->dfs_radarq));
ATH_DFSQ_UNLOCK(dfs);
while ((!empty) && (!retval) && (events_processed < MAX_EVENTS)) {
ATH_DFSQ_LOCK(dfs);
event = STAILQ_FIRST(&(dfs->dfs_radarq));
if (event != NULL)
STAILQ_REMOVE_HEAD(&(dfs->dfs_radarq), re_list);
ATH_DFSQ_UNLOCK(dfs);
if (event == NULL) {
empty = 1;
break;
}
events_processed++;
re = *event;
OS_MEMZERO(event, sizeof(struct dfs_event));
ATH_DFSEVENTQ_LOCK(dfs);
STAILQ_INSERT_TAIL(&(dfs->dfs_eventq), event, re_list);
ATH_DFSEVENTQ_UNLOCK(dfs);
found = 0;
if (re.re_chanindex < DFS_NUM_RADAR_STATES)
rs = &dfs->dfs_radar[re.re_chanindex];
else {
ATH_DFSQ_LOCK(dfs);
empty = STAILQ_EMPTY(&(dfs->dfs_radarq));
ATH_DFSQ_UNLOCK(dfs);
continue;
}
if (rs->rs_chan.priv_flags & CHANNEL_INTERFERENCE) {
ATH_DFSQ_LOCK(dfs);
empty = STAILQ_EMPTY(&(dfs->dfs_radarq));
ATH_DFSQ_UNLOCK(dfs);
continue;
}
if (dfs->dfs_rinfo.rn_lastfull_ts == 0) {
/*
* Either not started, or 64-bit rollover exactly to zero
* Just prepend zeros to the 15-bit ts
*/
dfs->dfs_rinfo.rn_ts_prefix = 0;
this_ts = (u_int64_t) re.re_ts;
} else {
/* WAR 23031- patch duplicate ts on very short pulses */
/* This pacth has two problems in linux environment.
* 1)The time stamp created and hence PRI depends entirely on the latency.
* If the latency is high, it possibly can split two consecutive
* pulses in the same burst so far away (the same amount of latency)
* that make them look like they are from differenct bursts. It is
* observed to happen too often. It sure makes the detection fail.
* 2)Even if the latency is not that bad, it simply shifts the duplicate
* timestamps to a new duplicate timestamp based on how they are processed.
* This is not worse but not good either.
*
* Take this pulse as a good one and create a probable PRI later
*/
if (re.re_dur == 0 && re.re_ts == dfs->dfs_rinfo.rn_last_unique_ts) {
debug_dup[debug_dup_cnt++] = '1';
DFS_DPRINTK(sc, ATH_DEBUG_DFS1, "\n %s deltaT is 0 \n", __func__);
} else {
dfs->dfs_rinfo.rn_last_unique_ts = re.re_ts;
debug_dup[debug_dup_cnt++] = '0';
}
if (debug_dup_cnt >= 32){
debug_dup_cnt = 0;
}
if (re.re_ts <= dfs->dfs_rinfo.rn_last_ts) {
dfs->dfs_rinfo.rn_ts_prefix +=
(((u_int64_t) 1) << DFS_TSSHIFT);
/* Now, see if it's been more than 1 wrap */
deltafull_ts = re.re_full_ts - dfs->dfs_rinfo.rn_lastfull_ts;
if (deltafull_ts >
((u_int64_t)((DFS_TSMASK - dfs->dfs_rinfo.rn_last_ts) + 1 + re.re_ts)))
deltafull_ts -= (DFS_TSMASK - dfs->dfs_rinfo.rn_last_ts) + 1 + re.re_ts;
deltafull_ts = deltafull_ts >> DFS_TSSHIFT;
if (deltafull_ts > 1) {
dfs->dfs_rinfo.rn_ts_prefix +=
((deltafull_ts - 1) << DFS_TSSHIFT);
}
} else {
deltafull_ts = re.re_full_ts - dfs->dfs_rinfo.rn_lastfull_ts;
if (deltafull_ts > (u_int64_t) DFS_TSMASK) {
deltafull_ts = deltafull_ts >> DFS_TSSHIFT;
dfs->dfs_rinfo.rn_ts_prefix +=
((deltafull_ts - 1) << DFS_TSSHIFT);
}
}
void
dfs_print_filter(struct ath_softc *sc, struct dfs_filter *rf)
{
DFS_DPRINTK(sc, ATH_DEBUG_DFS1, "filterID[%d] rf_numpulses=%u; rf->rf_minpri=%u; rf->rf_maxpri=%u; rf->rf_threshold=%u; rf->rf_filterlen=%u; rf->rf_mindur=%u; rf->rf_maxdur=%u\n", rf->rf_pulseid, rf->rf_numpulses, rf->rf_minpri, rf->rf_maxpri, rf->rf_threshold, rf->rf_filterlen, rf->rf_mindur, rf->rf_maxdur);
}