Prakash Dhavali | 7090c5f | 2015-11-02 17:55:19 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2002-2014 The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Previously licensed under the ISC license by Qualcomm Atheros, Inc. |
| 5 | * |
| 6 | * |
| 7 | * Permission to use, copy, modify, and/or distribute this software for |
| 8 | * any purpose with or without fee is hereby granted, provided that the |
| 9 | * above copyright notice and this permission notice appear in all |
| 10 | * copies. |
| 11 | * |
| 12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL |
| 13 | * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED |
| 14 | * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE |
| 15 | * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
| 16 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 17 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 18 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 19 | * PERFORMANCE OF THIS SOFTWARE. |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * This file was originally distributed by Qualcomm Atheros, Inc. |
| 24 | * under proprietary terms before Copyright ownership was assigned |
| 25 | * to the Linux Foundation. |
| 26 | */ |
| 27 | |
| 28 | /*=========================================================================== |
| 29 | |
| 30 | dfs_init.c |
| 31 | |
| 32 | OVERVIEW: |
| 33 | |
| 34 | Source code borrowed from QCA_MAIN DFS module |
| 35 | |
| 36 | DEPENDENCIES: |
| 37 | |
| 38 | Are listed for each API below. |
| 39 | |
| 40 | ===========================================================================*/ |
| 41 | |
| 42 | /*=========================================================================== |
| 43 | |
| 44 | EDIT HISTORY FOR FILE |
| 45 | |
| 46 | This section contains comments describing changes made to the module. |
| 47 | Notice that changes are listed in reverse chronological order. |
| 48 | |
| 49 | when who what, where, why |
| 50 | ---------- --- -------------------------------------------------------- |
| 51 | |
| 52 | ===========================================================================*/ |
| 53 | |
| 54 | #include "dfs.h" |
| 55 | /* TO DO DFS |
| 56 | #include <ieee80211_var.h> |
| 57 | */ |
| 58 | #ifdef ATH_SUPPORT_DFS |
| 59 | |
| 60 | extern int domainoverride; |
| 61 | |
| 62 | /* |
| 63 | * Clear all delay lines for all filter types |
| 64 | * |
| 65 | * This may be called before any radar pulses are configured |
| 66 | * (eg on a non-DFS channel, with radar PHY errors still showing up.) |
| 67 | * In that case, just drop out early. |
| 68 | */ |
| 69 | void dfs_reset_alldelaylines(struct ath_dfs *dfs) |
| 70 | { |
| 71 | struct dfs_filtertype *ft = NULL; |
| 72 | struct dfs_filter *rf; |
| 73 | struct dfs_delayline *dl; |
| 74 | struct dfs_pulseline *pl; |
| 75 | int i, j; |
| 76 | |
| 77 | if (dfs == NULL) { |
| 78 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 79 | "%s[%d]: sc_dfs is NULL", __func__, __LINE__); |
| 80 | return; |
| 81 | } |
| 82 | pl = dfs->pulses; |
| 83 | |
| 84 | if (pl == NULL) { |
| 85 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 86 | "%s[%d]: pl==NULL, dfs=%p", __func__, __LINE__, dfs); |
| 87 | return; |
| 88 | } |
| 89 | |
| 90 | if (dfs->dfs_b5radars == NULL) { |
| 91 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 92 | "%s[%d]: pl==NULL, b5radars=%p", __func__, __LINE__, |
| 93 | dfs->dfs_b5radars); |
| 94 | return; |
| 95 | } |
| 96 | |
| 97 | /* reset the pulse log */ |
| 98 | pl->pl_firstelem = pl->pl_numelems = 0; |
| 99 | pl->pl_lastelem = DFS_MAX_PULSE_BUFFER_MASK; |
| 100 | |
| 101 | for (i = 0; i < DFS_MAX_RADAR_TYPES; i++) { |
| 102 | if (dfs->dfs_radarf[i] != NULL) { |
| 103 | ft = dfs->dfs_radarf[i]; |
| 104 | if (NULL != ft) { |
| 105 | for (j = 0; j < ft->ft_numfilters; j++) { |
| 106 | rf = &(ft->ft_filters[j]); |
| 107 | dl = &(rf->rf_dl); |
| 108 | if (dl != NULL) { |
| 109 | OS_MEMZERO(dl, |
| 110 | sizeof(struct |
| 111 | dfs_delayline)); |
| 112 | dl->dl_lastelem = |
| 113 | (0xFFFFFFFF) & |
| 114 | DFS_MAX_DL_MASK; |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | } |
| 120 | for (i = 0; i < dfs->dfs_rinfo.rn_numbin5radars; i++) { |
| 121 | OS_MEMZERO(&(dfs->dfs_b5radars[i].br_elems[0]), |
| 122 | sizeof(struct dfs_bin5elem) * DFS_MAX_B5_SIZE); |
| 123 | dfs->dfs_b5radars[i].br_firstelem = 0; |
| 124 | dfs->dfs_b5radars[i].br_numelems = 0; |
| 125 | dfs->dfs_b5radars[i].br_lastelem = |
| 126 | (0xFFFFFFFF) & DFS_MAX_B5_MASK; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | /* |
| 131 | * Clear only a single delay line |
| 132 | */ |
| 133 | |
| 134 | void dfs_reset_delayline(struct dfs_delayline *dl) |
| 135 | { |
| 136 | OS_MEMZERO(&(dl->dl_elems[0]), sizeof(dl->dl_elems)); |
| 137 | dl->dl_lastelem = (0xFFFFFFFF) & DFS_MAX_DL_MASK; |
| 138 | } |
| 139 | |
| 140 | void dfs_reset_filter_delaylines(struct dfs_filtertype *dft) |
| 141 | { |
| 142 | int i; |
| 143 | struct dfs_filter *df; |
| 144 | for (i = 0; i < DFS_MAX_NUM_RADAR_FILTERS; i++) { |
| 145 | df = &dft->ft_filters[i]; |
| 146 | dfs_reset_delayline(&(df->rf_dl)); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | void dfs_reset_radarq(struct ath_dfs *dfs) |
| 151 | { |
| 152 | struct dfs_event *event; |
| 153 | if (dfs == NULL) { |
| 154 | DFS_DPRINTK(dfs, ATH_DEBUG_DFS, "%s: sc_dfs is NULL", __func__); |
| 155 | return; |
| 156 | } |
| 157 | ATH_DFSQ_LOCK(dfs); |
| 158 | ATH_DFSEVENTQ_LOCK(dfs); |
| 159 | while (!STAILQ_EMPTY(&(dfs->dfs_radarq))) { |
| 160 | event = STAILQ_FIRST(&(dfs->dfs_radarq)); |
| 161 | STAILQ_REMOVE_HEAD(&(dfs->dfs_radarq), re_list); |
| 162 | OS_MEMZERO(event, sizeof(struct dfs_event)); |
| 163 | STAILQ_INSERT_TAIL(&(dfs->dfs_eventq), event, re_list); |
| 164 | } |
| 165 | ATH_DFSEVENTQ_UNLOCK(dfs); |
| 166 | ATH_DFSQ_UNLOCK(dfs); |
| 167 | } |
| 168 | |
| 169 | /* This function Initialize the radar filter tables |
| 170 | * if the ath dfs domain is uninitalized or |
| 171 | * ath dfs domain is different from hal dfs domain |
| 172 | */ |
| 173 | int dfs_init_radar_filters(struct ieee80211com *ic, |
| 174 | struct ath_dfs_radar_tab_info *radar_info) |
| 175 | { |
| 176 | uint32_t T, Tmax; |
| 177 | int numpulses, p, n, i; |
| 178 | int numradars = 0, numb5radars = 0; |
| 179 | struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs; |
| 180 | struct dfs_filtertype *ft = NULL; |
| 181 | struct dfs_filter *rf = NULL; |
| 182 | struct dfs_pulse *dfs_radars; |
| 183 | struct dfs_bin5pulse *b5pulses = NULL; |
| 184 | int32_t min_rssithresh = DFS_MAX_RSSI_VALUE; |
| 185 | uint32_t max_pulsedur = 0; |
| 186 | |
| 187 | if (dfs == NULL) { |
| 188 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 189 | "%s[%d]: dfs is NULL", __func__, __LINE__); |
| 190 | return DFS_STATUS_FAIL; |
| 191 | } |
| 192 | /* clear up the dfs domain flag first */ |
| 193 | #ifndef ATH_DFS_RADAR_DETECTION_ONLY |
| 194 | dfs->ath_dfs_isdfsregdomain = 0; |
| 195 | #endif |
| 196 | |
| 197 | /* |
| 198 | * If radar_info is NULL or dfsdomain is NULL, treat |
| 199 | * the rest of the radar configuration as suspect. |
| 200 | */ |
| 201 | if (radar_info == NULL || radar_info->dfsdomain == 0) { |
| 202 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_ERROR, |
| 203 | "%s[%d]: Unknown dfs domain %d ", |
| 204 | __func__, __LINE__, dfs->dfsdomain); |
| 205 | /* Disable radar detection since we don't have a radar domain */ |
| 206 | dfs->dfs_proc_phyerr &= ~DFS_RADAR_EN; |
| 207 | /* Returning success though we are not completing init. A failure |
| 208 | * will fail dfs_attach also. |
| 209 | */ |
| 210 | return DFS_STATUS_SUCCESS; |
| 211 | } |
| 212 | |
| 213 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO, |
| 214 | "%s[%d]:dfsdomain=%d, numradars=%d, numb5radars=%d", |
| 215 | __func__, __LINE__, radar_info->dfsdomain, |
| 216 | radar_info->numradars, radar_info->numb5radars); |
| 217 | dfs->dfsdomain = radar_info->dfsdomain; |
| 218 | dfs_radars = radar_info->dfs_radars; |
| 219 | numradars = radar_info->numradars; |
| 220 | b5pulses = radar_info->b5pulses; |
| 221 | numb5radars = radar_info->numb5radars; |
| 222 | |
| 223 | /* XXX this should be an explicit copy of some sort! */ |
| 224 | dfs->dfs_defaultparams = radar_info->dfs_defaultparams; |
| 225 | |
| 226 | #ifndef ATH_DFS_RADAR_DETECTION_ONLY |
| 227 | dfs->ath_dfs_isdfsregdomain = 1; |
| 228 | #endif |
| 229 | |
| 230 | dfs->dfs_rinfo.rn_numradars = 0; |
| 231 | /* Clear filter type table */ |
| 232 | for (n = 0; n < 256; n++) { |
| 233 | for (i = 0; i < DFS_MAX_RADAR_OVERLAP; i++) |
| 234 | (dfs->dfs_radartable[n])[i] = -1; |
| 235 | } |
| 236 | /* Now, initialize the radar filters */ |
| 237 | for (p = 0; p < numradars; p++) { |
| 238 | ft = NULL; |
| 239 | for (n = 0; n < dfs->dfs_rinfo.rn_numradars; n++) { |
| 240 | if ((dfs_radars[p].rp_pulsedur == |
| 241 | dfs->dfs_radarf[n]->ft_filterdur) |
| 242 | && (dfs_radars[p].rp_numpulses == |
| 243 | dfs->dfs_radarf[n]->ft_numpulses) |
| 244 | && (dfs_radars[p].rp_mindur == |
| 245 | dfs->dfs_radarf[n]->ft_mindur) |
| 246 | && (dfs_radars[p].rp_maxdur == |
| 247 | dfs->dfs_radarf[n]->ft_maxdur)) { |
| 248 | ft = dfs->dfs_radarf[n]; |
| 249 | break; |
| 250 | } |
| 251 | } |
| 252 | if (ft == NULL) { |
| 253 | /* No filter of the appropriate dur was found */ |
| 254 | if ((dfs->dfs_rinfo.rn_numradars + 1) > |
| 255 | DFS_MAX_RADAR_TYPES) { |
| 256 | DFS_DPRINTK(dfs, ATH_DEBUG_DFS, |
| 257 | "%s: Too many filter types", |
| 258 | __func__); |
| 259 | goto bad4; |
| 260 | } |
| 261 | ft = dfs->dfs_radarf[dfs->dfs_rinfo.rn_numradars]; |
| 262 | ft->ft_numfilters = 0; |
| 263 | ft->ft_numpulses = dfs_radars[p].rp_numpulses; |
| 264 | ft->ft_patterntype = dfs_radars[p].rp_patterntype; |
| 265 | ft->ft_mindur = dfs_radars[p].rp_mindur; |
| 266 | ft->ft_maxdur = dfs_radars[p].rp_maxdur; |
| 267 | ft->ft_filterdur = dfs_radars[p].rp_pulsedur; |
| 268 | ft->ft_rssithresh = dfs_radars[p].rp_rssithresh; |
| 269 | ft->ft_rssimargin = dfs_radars[p].rp_rssimargin; |
| 270 | ft->ft_minpri = 1000000; |
| 271 | |
| 272 | if (ft->ft_rssithresh < min_rssithresh) |
| 273 | min_rssithresh = ft->ft_rssithresh; |
| 274 | if (ft->ft_maxdur > max_pulsedur) |
| 275 | max_pulsedur = ft->ft_maxdur; |
| 276 | for (i = ft->ft_mindur; i <= ft->ft_maxdur; i++) { |
| 277 | uint32_t stop = 0, tableindex = 0; |
| 278 | while ((tableindex < DFS_MAX_RADAR_OVERLAP) |
| 279 | && (!stop)) { |
| 280 | if ((dfs-> |
| 281 | dfs_radartable[i])[tableindex] == |
| 282 | -1) |
| 283 | stop = 1; |
| 284 | else |
| 285 | tableindex++; |
| 286 | } |
| 287 | if (stop) { |
| 288 | (dfs->dfs_radartable[i])[tableindex] = |
| 289 | (int8_t) (dfs->dfs_rinfo. |
| 290 | rn_numradars); |
| 291 | } else { |
| 292 | DFS_DPRINTK(dfs, ATH_DEBUG_DFS, |
| 293 | "%s: Too many overlapping radar filters", |
| 294 | __func__); |
| 295 | goto bad4; |
| 296 | } |
| 297 | } |
| 298 | dfs->dfs_rinfo.rn_numradars++; |
| 299 | } |
| 300 | rf = &(ft->ft_filters[ft->ft_numfilters++]); |
| 301 | dfs_reset_delayline(&rf->rf_dl); |
| 302 | numpulses = dfs_radars[p].rp_numpulses; |
| 303 | |
| 304 | rf->rf_numpulses = numpulses; |
| 305 | rf->rf_patterntype = dfs_radars[p].rp_patterntype; |
| 306 | rf->rf_pulseid = dfs_radars[p].rp_pulseid; |
| 307 | rf->rf_mindur = dfs_radars[p].rp_mindur; |
| 308 | rf->rf_maxdur = dfs_radars[p].rp_maxdur; |
| 309 | rf->rf_numpulses = dfs_radars[p].rp_numpulses; |
| 310 | rf->rf_ignore_pri_window = dfs_radars[p].rp_ignore_pri_window; |
| 311 | T = (100000000 / dfs_radars[p].rp_max_pulsefreq) - |
| 312 | 100 * (dfs_radars[p].rp_meanoffset); |
| 313 | rf->rf_minpri = |
| 314 | dfs_round((int32_t) T - |
| 315 | (100 * (dfs_radars[p].rp_pulsevar))); |
| 316 | Tmax = |
| 317 | (100000000 / dfs_radars[p].rp_pulsefreq) - |
| 318 | 100 * (dfs_radars[p].rp_meanoffset); |
| 319 | rf->rf_maxpri = |
| 320 | dfs_round((int32_t) Tmax + |
| 321 | (100 * (dfs_radars[p].rp_pulsevar))); |
| 322 | |
| 323 | if (rf->rf_minpri < ft->ft_minpri) |
| 324 | ft->ft_minpri = rf->rf_minpri; |
| 325 | |
| 326 | rf->rf_fixed_pri_radar_pulse = |
| 327 | (dfs_radars[p].rp_max_pulsefreq == |
| 328 | dfs_radars[p].rp_pulsefreq) ? 1 : 0; |
| 329 | rf->rf_threshold = dfs_radars[p].rp_threshold; |
| 330 | rf->rf_filterlen = rf->rf_maxpri * rf->rf_numpulses; |
| 331 | |
| 332 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO, |
| 333 | "%s[%d]: minprf = %d maxprf = %d pulsevar = %d thresh=%d", |
| 334 | __func__, __LINE__, dfs_radars[p].rp_pulsefreq, |
| 335 | dfs_radars[p].rp_max_pulsefreq, |
| 336 | dfs_radars[p].rp_pulsevar, rf->rf_threshold); |
| 337 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO, |
| 338 | "%s[%d]:minpri = %d maxpri = %d filterlen = %d filterID = %d", |
| 339 | __func__, __LINE__, rf->rf_minpri, rf->rf_maxpri, |
| 340 | rf->rf_filterlen, rf->rf_pulseid); |
| 341 | |
| 342 | } |
| 343 | |
| 344 | #ifdef DFS_DEBUG |
| 345 | dfs_print_filters(ic); |
| 346 | #endif |
| 347 | dfs->dfs_rinfo.rn_numbin5radars = numb5radars; |
| 348 | if (dfs->dfs_b5radars != NULL) |
| 349 | OS_FREE(dfs->dfs_b5radars); |
| 350 | |
| 351 | dfs->dfs_b5radars = (struct dfs_bin5radars *)os_malloc(NULL, |
| 352 | numb5radars * |
| 353 | sizeof(struct |
| 354 | dfs_bin5radars), |
| 355 | GFP_KERNEL); |
| 356 | if (dfs->dfs_b5radars == NULL) { |
| 357 | DFS_DPRINTK(dfs, ATH_DEBUG_DFS, |
| 358 | "%s: cannot allocate memory for bin5 radars", |
| 359 | __func__); |
| 360 | goto bad4; |
| 361 | } |
| 362 | for (n = 0; n < numb5radars; n++) { |
| 363 | dfs->dfs_b5radars[n].br_pulse = b5pulses[n]; |
| 364 | dfs->dfs_b5radars[n].br_pulse.b5_timewindow *= 1000000; |
| 365 | if (dfs->dfs_b5radars[n].br_pulse.b5_rssithresh < |
| 366 | min_rssithresh) |
| 367 | min_rssithresh = |
| 368 | dfs->dfs_b5radars[n].br_pulse.b5_rssithresh; |
| 369 | if (dfs->dfs_b5radars[n].br_pulse.b5_maxdur > max_pulsedur) |
| 370 | max_pulsedur = dfs->dfs_b5radars[n].br_pulse.b5_maxdur; |
| 371 | } |
| 372 | dfs_reset_alldelaylines(dfs); |
| 373 | dfs_reset_radarq(dfs); |
| 374 | dfs->dfs_curchan_radindex = -1; |
| 375 | dfs->dfs_extchan_radindex = -1; |
| 376 | dfs->dfs_rinfo.rn_minrssithresh = min_rssithresh; |
| 377 | /* Convert durations to TSF ticks */ |
| 378 | dfs->dfs_rinfo.rn_maxpulsedur = |
| 379 | dfs_round((int32_t) ((max_pulsedur * 100 / 80) * 100)); |
| 380 | /* relax the max pulse duration a little bit due to inaccuracy caused by chirping. */ |
| 381 | dfs->dfs_rinfo.rn_maxpulsedur = dfs->dfs_rinfo.rn_maxpulsedur + 20; |
| 382 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO, |
| 383 | "%s[%d]: DFS min filter rssiThresh = %d", |
| 384 | __func__, __LINE__, min_rssithresh); |
| 385 | CDF_TRACE(CDF_MODULE_ID_SAP, CDF_TRACE_LEVEL_INFO, |
| 386 | "%s[%d]:DFS max pulse dur = %d ticks", |
| 387 | __func__, __LINE__, dfs->dfs_rinfo.rn_maxpulsedur); |
| 388 | return DFS_STATUS_SUCCESS; |
| 389 | |
| 390 | bad4: |
| 391 | return DFS_STATUS_FAIL; |
| 392 | } |
| 393 | |
| 394 | void dfs_clear_stats(struct ieee80211com *ic) |
| 395 | { |
| 396 | struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs; |
| 397 | if (dfs == NULL) |
| 398 | return; |
| 399 | OS_MEMZERO(&dfs->ath_dfs_stats, sizeof(struct dfs_stats)); |
| 400 | dfs->ath_dfs_stats.last_reset_tstamp = ic->ic_get_TSF64(ic); |
| 401 | } |
| 402 | |
| 403 | #endif /* ATH_SUPPORT_DFS */ |