1 /* 2 * Copyright (c) 2013 Qualcomm Atheros, Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH 9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 10 * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, 11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 13 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 14 * PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "opt_ah.h" 18 19 #include "ah.h" 20 #include "ah_internal.h" 21 #include "ah_desc.h" 22 //#include "ah_pktlog.h" 23 24 #include "ar9300/ar9300.h" 25 #include "ar9300/ar9300reg.h" 26 #include "ar9300/ar9300phy.h" 27 28 extern void ar9300_set_rx_filter(struct ath_hal *ah, u_int32_t bits); 29 extern u_int32_t ar9300_get_rx_filter(struct ath_hal *ah); 30 31 #define HAL_ANI_DEBUG 1 32 33 /* 34 * Anti noise immunity support. We track phy errors and react 35 * to excessive errors by adjusting the noise immunity parameters. 36 */ 37 38 /****************************************************************************** 39 * 40 * New Ani Algorithm for Station side only 41 * 42 *****************************************************************************/ 43 44 #define HAL_ANI_OFDM_TRIG_HIGH 1000 /* units are errors per second */ 45 #define HAL_ANI_OFDM_TRIG_LOW 400 /* units are errors per second */ 46 #define HAL_ANI_CCK_TRIG_HIGH 600 /* units are errors per second */ 47 #define HAL_ANI_CCK_TRIG_LOW 300 /* units are errors per second */ 48 #define HAL_ANI_USE_OFDM_WEAK_SIG AH_TRUE 49 #define HAL_ANI_ENABLE_MRC_CCK AH_TRUE /* default is enabled */ 50 #define HAL_ANI_DEF_SPUR_IMMUNE_LVL 3 51 #define HAL_ANI_DEF_FIRSTEP_LVL 2 52 #define HAL_ANI_RSSI_THR_HIGH 40 53 #define HAL_ANI_RSSI_THR_LOW 7 54 #define HAL_ANI_PERIOD 1000 55 56 #define HAL_NOISE_DETECT_PERIOD 100 57 #define HAL_NOISE_RECOVER_PERIOD 5000 58 59 #define HAL_SIG_FIRSTEP_SETTING_MIN 0 60 #define HAL_SIG_FIRSTEP_SETTING_MAX 20 61 #define HAL_SIG_SPUR_IMM_SETTING_MIN 0 62 #define HAL_SIG_SPUR_IMM_SETTING_MAX 22 63 64 #define HAL_EP_RND(x, mul) \ 65 ((((x) % (mul)) >= ((mul) / 2)) ? ((x) + ((mul) - 1)) / (mul) : (x) / (mul)) 66 #define BEACON_RSSI(ahp) \ 67 HAL_EP_RND(ahp->ah_stats.ast_nodestats.ns_avgbrssi, \ 68 HAL_RSSI_EP_MULTIPLIER) 69 70 typedef int TABLE[]; 71 /* 72 * level: 0 1 2 3 4 5 6 7 8 73 * firstep_table: lvl 0-8, default 2 74 */ 75 static const TABLE firstep_table = { -4, -2, 0, 2, 4, 6, 8, 10, 12}; 76 /* cycpwr_thr1_table: lvl 0-7, default 3 */ 77 static const TABLE cycpwr_thr1_table = { -6, -4, -2, 0, 2, 4, 6, 8 }; 78 /* values here are relative to the INI */ 79 80 typedef struct _HAL_ANI_OFDM_LEVEL_ENTRY { 81 int spur_immunity_level; 82 int fir_step_level; 83 int ofdm_weak_signal_on; 84 } HAL_ANI_OFDM_LEVEL_ENTRY; 85 static const HAL_ANI_OFDM_LEVEL_ENTRY ofdm_level_table[] = { 86 /* SI FS WS */ 87 { 0, 0, 1 }, /* lvl 0 */ 88 { 1, 1, 1 }, /* lvl 1 */ 89 { 2, 2, 1 }, /* lvl 2 */ 90 { 3, 2, 1 }, /* lvl 3 (default) */ 91 { 4, 3, 1 }, /* lvl 4 */ 92 { 5, 4, 1 }, /* lvl 5 */ 93 { 6, 5, 1 }, /* lvl 6 */ 94 { 7, 6, 1 }, /* lvl 7 */ 95 { 7, 7, 1 }, /* lvl 8 */ 96 { 7, 8, 0 } /* lvl 9 */ 97 }; 98 #define HAL_ANI_OFDM_NUM_LEVEL \ 99 (sizeof(ofdm_level_table) / sizeof(ofdm_level_table[0])) 100 #define HAL_ANI_OFDM_MAX_LEVEL (HAL_ANI_OFDM_NUM_LEVEL - 1) 101 #define HAL_ANI_OFDM_DEF_LEVEL 3 /* default level - matches the INI settings */ 102 103 typedef struct _HAL_ANI_CCK_LEVEL_ENTRY { 104 int fir_step_level; 105 int mrc_cck_on; 106 } HAL_ANI_CCK_LEVEL_ENTRY; 107 108 static const HAL_ANI_CCK_LEVEL_ENTRY cck_level_table[] = { 109 /* FS MRC-CCK */ 110 { 0, 1 }, /* lvl 0 */ 111 { 1, 1 }, /* lvl 1 */ 112 { 2, 1 }, /* lvl 2 (default) */ 113 { 3, 1 }, /* lvl 3 */ 114 { 4, 0 }, /* lvl 4 */ 115 { 5, 0 }, /* lvl 5 */ 116 { 6, 0 }, /* lvl 6 */ 117 { 7, 0 }, /* lvl 7 (only for high rssi) */ 118 { 8, 0 } /* lvl 8 (only for high rssi) */ 119 }; 120 #define HAL_ANI_CCK_NUM_LEVEL \ 121 (sizeof(cck_level_table) / sizeof(cck_level_table[0])) 122 #define HAL_ANI_CCK_MAX_LEVEL (HAL_ANI_CCK_NUM_LEVEL - 1) 123 #define HAL_ANI_CCK_MAX_LEVEL_LOW_RSSI (HAL_ANI_CCK_NUM_LEVEL - 3) 124 #define HAL_ANI_CCK_DEF_LEVEL 2 /* default level - matches the INI settings */ 125 126 /* 127 * register values to turn OFDM weak signal detection OFF 128 */ 129 static const int m1_thresh_low_off = 127; 130 static const int m2_thresh_low_off = 127; 131 static const int m1_thresh_off = 127; 132 static const int m2_thresh_off = 127; 133 static const int m2_count_thr_off = 31; 134 static const int m2_count_thr_low_off = 63; 135 static const int m1_thresh_low_ext_off = 127; 136 static const int m2_thresh_low_ext_off = 127; 137 static const int m1_thresh_ext_off = 127; 138 static const int m2_thresh_ext_off = 127; 139 140 void 141 ar9300_enable_mib_counters(struct ath_hal *ah) 142 { 143 HALDEBUG(ah, HAL_DEBUG_RESET, "%s: Enable MIB counters\n", __func__); 144 /* Clear the mib counters and save them in the stats */ 145 ar9300_update_mib_mac_stats(ah); 146 147 OS_REG_WRITE(ah, AR_FILT_OFDM, 0); 148 OS_REG_WRITE(ah, AR_FILT_CCK, 0); 149 OS_REG_WRITE(ah, AR_MIBC, 150 ~(AR_MIBC_COW | AR_MIBC_FMC | AR_MIBC_CMC | AR_MIBC_MCS) & 0x0f); 151 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_1, AR_PHY_ERR_OFDM_TIMING); 152 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING); 153 154 } 155 156 void 157 ar9300_disable_mib_counters(struct ath_hal *ah) 158 { 159 HALDEBUG(ah, HAL_DEBUG_RESET, "%s: Disabling MIB counters\n", __func__); 160 161 OS_REG_WRITE(ah, AR_MIBC, AR_MIBC_FMC | AR_MIBC_CMC); 162 163 /* Clear the mib counters and save them in the stats */ 164 ar9300_update_mib_mac_stats(ah); 165 166 OS_REG_WRITE(ah, AR_FILT_OFDM, 0); 167 OS_REG_WRITE(ah, AR_FILT_CCK, 0); 168 } 169 170 /* 171 * This routine returns the index into the ani_state array that 172 * corresponds to the channel in *chan. If no match is found and the 173 * array is still not fully utilized, a new entry is created for the 174 * channel. We assume the attach function has already initialized the 175 * ah_ani values and only the channel field needs to be set. 176 */ 177 static int 178 ar9300_get_ani_channel_index(struct ath_hal *ah, 179 const struct ieee80211_channel *chan) 180 { 181 struct ath_hal_9300 *ahp = AH9300(ah); 182 int i; 183 184 for (i = 0; i < ARRAY_LENGTH(ahp->ah_ani); i++) { 185 /* XXX this doesn't distinguish between 20/40 channels */ 186 if (ahp->ah_ani[i].c.ic_freq == chan->ic_freq) { 187 return i; 188 } 189 if (ahp->ah_ani[i].c.ic_freq == 0) { 190 ahp->ah_ani[i].c.ic_freq = chan->ic_freq; 191 ahp->ah_ani[i].c.ic_flags = chan->ic_flags; 192 return i; 193 } 194 } 195 /* XXX statistic */ 196 HALDEBUG(ah, HAL_DEBUG_UNMASKABLE, 197 "%s: No more channel states left. Using channel 0\n", __func__); 198 return 0; /* XXX gotta return something valid */ 199 } 200 201 /* 202 * Return the current ANI state of the channel we're on 203 */ 204 struct ar9300_ani_state * 205 ar9300_ani_get_current_state(struct ath_hal *ah) 206 { 207 return AH9300(ah)->ah_curani; 208 } 209 210 /* 211 * Return the current statistics. 212 */ 213 HAL_ANI_STATS * 214 ar9300_ani_get_current_stats(struct ath_hal *ah) 215 { 216 return &AH9300(ah)->ah_stats; 217 } 218 219 /* 220 * Setup ANI handling. Sets all thresholds and levels to default level AND 221 * resets the channel statistics 222 */ 223 224 void 225 ar9300_ani_attach(struct ath_hal *ah) 226 { 227 struct ath_hal_9300 *ahp = AH9300(ah); 228 int i; 229 230 OS_MEMZERO(ahp->ah_ani, sizeof(ahp->ah_ani)); 231 for (i = 0; i < ARRAY_LENGTH(ahp->ah_ani); i++) { 232 ahp->ah_ani[i].ofdm_trig_high = HAL_ANI_OFDM_TRIG_HIGH; 233 ahp->ah_ani[i].ofdm_trig_low = HAL_ANI_OFDM_TRIG_LOW; 234 ahp->ah_ani[i].cck_trig_high = HAL_ANI_CCK_TRIG_HIGH; 235 ahp->ah_ani[i].cck_trig_low = HAL_ANI_CCK_TRIG_LOW; 236 ahp->ah_ani[i].rssi_thr_high = HAL_ANI_RSSI_THR_HIGH; 237 ahp->ah_ani[i].rssi_thr_low = HAL_ANI_RSSI_THR_LOW; 238 ahp->ah_ani[i].ofdm_noise_immunity_level = HAL_ANI_OFDM_DEF_LEVEL; 239 ahp->ah_ani[i].cck_noise_immunity_level = HAL_ANI_CCK_DEF_LEVEL; 240 ahp->ah_ani[i].ofdm_weak_sig_detect_off = !HAL_ANI_USE_OFDM_WEAK_SIG; 241 ahp->ah_ani[i].spur_immunity_level = HAL_ANI_DEF_SPUR_IMMUNE_LVL; 242 ahp->ah_ani[i].firstep_level = HAL_ANI_DEF_FIRSTEP_LVL; 243 ahp->ah_ani[i].mrc_cck_off = !HAL_ANI_ENABLE_MRC_CCK; 244 ahp->ah_ani[i].ofdms_turn = AH_TRUE; 245 ahp->ah_ani[i].must_restore = AH_FALSE; 246 } 247 248 /* 249 * Since we expect some ongoing maintenance on the tables, 250 * let's sanity check here. 251 * The default level should not modify INI setting. 252 */ 253 HALASSERT(firstep_table[HAL_ANI_DEF_FIRSTEP_LVL] == 0); 254 HALASSERT(cycpwr_thr1_table[HAL_ANI_DEF_SPUR_IMMUNE_LVL] == 0); 255 HALASSERT( 256 ofdm_level_table[HAL_ANI_OFDM_DEF_LEVEL].fir_step_level == 257 HAL_ANI_DEF_FIRSTEP_LVL); 258 HALASSERT( 259 ofdm_level_table[HAL_ANI_OFDM_DEF_LEVEL].spur_immunity_level == 260 HAL_ANI_DEF_SPUR_IMMUNE_LVL); 261 HALASSERT( 262 cck_level_table[HAL_ANI_CCK_DEF_LEVEL].fir_step_level == 263 HAL_ANI_DEF_FIRSTEP_LVL); 264 265 /* Initialize and enable MIB Counters */ 266 OS_REG_WRITE(ah, AR_PHY_ERR_1, 0); 267 OS_REG_WRITE(ah, AR_PHY_ERR_2, 0); 268 ar9300_enable_mib_counters(ah); 269 270 ahp->ah_ani_period = HAL_ANI_PERIOD; 271 if (ah->ah_config.ath_hal_enable_ani) { 272 ahp->ah_proc_phy_err |= HAL_PROCESS_ANI; 273 } 274 } 275 276 /* 277 * Cleanup any ANI state setup. 278 */ 279 void 280 ar9300_ani_detach(struct ath_hal *ah) 281 { 282 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: Detaching Ani\n", __func__); 283 ar9300_disable_mib_counters(ah); 284 OS_REG_WRITE(ah, AR_PHY_ERR_1, 0); 285 OS_REG_WRITE(ah, AR_PHY_ERR_2, 0); 286 } 287 288 /* 289 * Initialize the ANI register values with default (ini) values. 290 * This routine is called during a (full) hardware reset after 291 * all the registers are initialised from the INI. 292 */ 293 void 294 ar9300_ani_init_defaults(struct ath_hal *ah, HAL_HT_MACMODE macmode) 295 { 296 struct ath_hal_9300 *ahp = AH9300(ah); 297 struct ar9300_ani_state *ani_state; 298 const struct ieee80211_channel *chan = AH_PRIVATE(ah)->ah_curchan; 299 int index; 300 u_int32_t val; 301 302 HALASSERT(chan != AH_NULL); 303 index = ar9300_get_ani_channel_index(ah, chan); 304 ani_state = &ahp->ah_ani[index]; 305 ahp->ah_curani = ani_state; 306 307 HALDEBUG(ah, HAL_DEBUG_ANI, 308 "%s: ver %d.%d opmode %u chan %d Mhz/0x%x macmode %d\n", 309 __func__, AH_PRIVATE(ah)->ah_macVersion, AH_PRIVATE(ah)->ah_macRev, 310 AH_PRIVATE(ah)->ah_opmode, chan->ic_freq, chan->ic_flags, macmode); 311 312 val = OS_REG_READ(ah, AR_PHY_SFCORR); 313 ani_state->ini_def.m1_thresh = MS(val, AR_PHY_SFCORR_M1_THRESH); 314 ani_state->ini_def.m2_thresh = MS(val, AR_PHY_SFCORR_M2_THRESH); 315 ani_state->ini_def.m2_count_thr = MS(val, AR_PHY_SFCORR_M2COUNT_THR); 316 317 val = OS_REG_READ(ah, AR_PHY_SFCORR_LOW); 318 ani_state->ini_def.m1_thresh_low = 319 MS(val, AR_PHY_SFCORR_LOW_M1_THRESH_LOW); 320 ani_state->ini_def.m2_thresh_low = 321 MS(val, AR_PHY_SFCORR_LOW_M2_THRESH_LOW); 322 ani_state->ini_def.m2_count_thr_low = 323 MS(val, AR_PHY_SFCORR_LOW_M2COUNT_THR_LOW); 324 325 val = OS_REG_READ(ah, AR_PHY_SFCORR_EXT); 326 ani_state->ini_def.m1_thresh_ext = MS(val, AR_PHY_SFCORR_EXT_M1_THRESH); 327 ani_state->ini_def.m2_thresh_ext = MS(val, AR_PHY_SFCORR_EXT_M2_THRESH); 328 ani_state->ini_def.m1_thresh_low_ext = 329 MS(val, AR_PHY_SFCORR_EXT_M1_THRESH_LOW); 330 ani_state->ini_def.m2_thresh_low_ext = 331 MS(val, AR_PHY_SFCORR_EXT_M2_THRESH_LOW); 332 333 ani_state->ini_def.firstep = 334 OS_REG_READ_FIELD(ah, AR_PHY_FIND_SIG, AR_PHY_FIND_SIG_FIRSTEP); 335 ani_state->ini_def.firstep_low = 336 OS_REG_READ_FIELD( 337 ah, AR_PHY_FIND_SIG_LOW, AR_PHY_FIND_SIG_LOW_FIRSTEP_LOW); 338 ani_state->ini_def.cycpwr_thr1 = 339 OS_REG_READ_FIELD(ah, AR_PHY_TIMING5, AR_PHY_TIMING5_CYCPWR_THR1); 340 ani_state->ini_def.cycpwr_thr1_ext = 341 OS_REG_READ_FIELD(ah, AR_PHY_EXT_CCA, AR_PHY_EXT_CYCPWR_THR1); 342 343 /* these levels just got reset to defaults by the INI */ 344 ani_state->spur_immunity_level = HAL_ANI_DEF_SPUR_IMMUNE_LVL; 345 ani_state->firstep_level = HAL_ANI_DEF_FIRSTEP_LVL; 346 ani_state->ofdm_weak_sig_detect_off = !HAL_ANI_USE_OFDM_WEAK_SIG; 347 ani_state->mrc_cck_off = !HAL_ANI_ENABLE_MRC_CCK; 348 349 ani_state->cycle_count = 0; 350 } 351 352 /* 353 * Set the ANI settings to match an OFDM level. 354 */ 355 static void 356 ar9300_ani_set_odfm_noise_immunity_level(struct ath_hal *ah, 357 u_int8_t ofdm_noise_immunity_level) 358 { 359 struct ath_hal_9300 *ahp = AH9300(ah); 360 struct ar9300_ani_state *ani_state = ahp->ah_curani; 361 362 ani_state->rssi = BEACON_RSSI(ahp); 363 HALDEBUG(ah, HAL_DEBUG_ANI, 364 "**** %s: ofdmlevel %d=>%d, rssi=%d[lo=%d hi=%d]\n", __func__, 365 ani_state->ofdm_noise_immunity_level, ofdm_noise_immunity_level, 366 ani_state->rssi, ani_state->rssi_thr_low, ani_state->rssi_thr_high); 367 368 ani_state->ofdm_noise_immunity_level = ofdm_noise_immunity_level; 369 370 if (ani_state->spur_immunity_level != 371 ofdm_level_table[ofdm_noise_immunity_level].spur_immunity_level) 372 { 373 ar9300_ani_control( 374 ah, HAL_ANI_SPUR_IMMUNITY_LEVEL, 375 ofdm_level_table[ofdm_noise_immunity_level].spur_immunity_level); 376 } 377 378 if (ani_state->firstep_level != 379 ofdm_level_table[ofdm_noise_immunity_level].fir_step_level && 380 ofdm_level_table[ofdm_noise_immunity_level].fir_step_level >= 381 cck_level_table[ani_state->cck_noise_immunity_level].fir_step_level) 382 { 383 ar9300_ani_control( 384 ah, HAL_ANI_FIRSTEP_LEVEL, 385 ofdm_level_table[ofdm_noise_immunity_level].fir_step_level); 386 } 387 388 if ((AH_PRIVATE(ah)->ah_opmode != HAL_M_STA || 389 ani_state->rssi <= ani_state->rssi_thr_high)) 390 { 391 if (ani_state->ofdm_weak_sig_detect_off) { 392 /* 393 * force on ofdm weak sig detect. 394 */ 395 ar9300_ani_control(ah, HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION, AH_TRUE); 396 } 397 } else if (ani_state->ofdm_weak_sig_detect_off == 398 ofdm_level_table[ofdm_noise_immunity_level].ofdm_weak_signal_on) 399 { 400 ar9300_ani_control( 401 ah, HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION, 402 ofdm_level_table[ofdm_noise_immunity_level].ofdm_weak_signal_on); 403 } 404 } 405 406 /* 407 * Set the ANI settings to match a CCK level. 408 */ 409 static void 410 ar9300_ani_set_cck_noise_immunity_level(struct ath_hal *ah, 411 u_int8_t cck_noise_immunity_level) 412 { 413 struct ath_hal_9300 *ahp = AH9300(ah); 414 struct ar9300_ani_state *ani_state = ahp->ah_curani; 415 int level; 416 417 ani_state->rssi = BEACON_RSSI(ahp); 418 HALDEBUG(ah, HAL_DEBUG_ANI, 419 "**** %s: ccklevel %d=>%d, rssi=%d[lo=%d hi=%d]\n", 420 __func__, ani_state->cck_noise_immunity_level, cck_noise_immunity_level, 421 ani_state->rssi, ani_state->rssi_thr_low, ani_state->rssi_thr_high); 422 423 if (AH_PRIVATE(ah)->ah_opmode == HAL_M_STA && 424 ani_state->rssi <= ani_state->rssi_thr_low && 425 cck_noise_immunity_level > HAL_ANI_CCK_MAX_LEVEL_LOW_RSSI) 426 { 427 cck_noise_immunity_level = HAL_ANI_CCK_MAX_LEVEL_LOW_RSSI; 428 } 429 430 ani_state->cck_noise_immunity_level = cck_noise_immunity_level; 431 432 level = ani_state->ofdm_noise_immunity_level; 433 if (ani_state->firstep_level != 434 cck_level_table[cck_noise_immunity_level].fir_step_level && 435 cck_level_table[cck_noise_immunity_level].fir_step_level >= 436 ofdm_level_table[level].fir_step_level) 437 { 438 ar9300_ani_control( 439 ah, HAL_ANI_FIRSTEP_LEVEL, 440 cck_level_table[cck_noise_immunity_level].fir_step_level); 441 } 442 443 if (ani_state->mrc_cck_off == 444 cck_level_table[cck_noise_immunity_level].mrc_cck_on) 445 { 446 ar9300_ani_control( 447 ah, HAL_ANI_MRC_CCK, 448 cck_level_table[cck_noise_immunity_level].mrc_cck_on); 449 } 450 } 451 452 /* 453 * Control Adaptive Noise Immunity Parameters 454 */ 455 HAL_BOOL 456 ar9300_ani_control(struct ath_hal *ah, HAL_ANI_CMD cmd, int param) 457 { 458 struct ath_hal_9300 *ahp = AH9300(ah); 459 struct ar9300_ani_state *ani_state = ahp->ah_curani; 460 const struct ieee80211_channel *chan = AH_PRIVATE(ah)->ah_curchan; 461 int32_t value, value2; 462 u_int level = param; 463 u_int is_on; 464 465 if (chan == NULL && cmd != HAL_ANI_MODE) { 466 HALDEBUG(ah, HAL_DEBUG_UNMASKABLE, 467 "%s: ignoring cmd 0x%02x - no channel\n", __func__, cmd); 468 return AH_FALSE; 469 } 470 471 switch (cmd & ahp->ah_ani_function) { 472 case HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION: 473 { 474 int m1_thresh_low, m2_thresh_low; 475 int m1_thresh, m2_thresh; 476 int m2_count_thr, m2_count_thr_low; 477 int m1_thresh_low_ext, m2_thresh_low_ext; 478 int m1_thresh_ext, m2_thresh_ext; 479 /* 480 * is_on == 1 means ofdm weak signal detection is ON 481 * (default, less noise imm) 482 * is_on == 0 means ofdm weak signal detection is OFF 483 * (more noise imm) 484 */ 485 is_on = param ? 1 : 0; 486 487 if (AR_SREV_JUPITER(ah) || AR_SREV_APHRODITE(ah)) 488 goto skip_ws_det; 489 490 /* 491 * make register setting for default (weak sig detect ON) 492 * come from INI file 493 */ 494 m1_thresh_low = is_on ? 495 ani_state->ini_def.m1_thresh_low : m1_thresh_low_off; 496 m2_thresh_low = is_on ? 497 ani_state->ini_def.m2_thresh_low : m2_thresh_low_off; 498 m1_thresh = is_on ? 499 ani_state->ini_def.m1_thresh : m1_thresh_off; 500 m2_thresh = is_on ? 501 ani_state->ini_def.m2_thresh : m2_thresh_off; 502 m2_count_thr = is_on ? 503 ani_state->ini_def.m2_count_thr : m2_count_thr_off; 504 m2_count_thr_low = is_on ? 505 ani_state->ini_def.m2_count_thr_low : m2_count_thr_low_off; 506 m1_thresh_low_ext = is_on ? 507 ani_state->ini_def.m1_thresh_low_ext : m1_thresh_low_ext_off; 508 m2_thresh_low_ext = is_on ? 509 ani_state->ini_def.m2_thresh_low_ext : m2_thresh_low_ext_off; 510 m1_thresh_ext = is_on ? 511 ani_state->ini_def.m1_thresh_ext : m1_thresh_ext_off; 512 m2_thresh_ext = is_on ? 513 ani_state->ini_def.m2_thresh_ext : m2_thresh_ext_off; 514 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_LOW, 515 AR_PHY_SFCORR_LOW_M1_THRESH_LOW, m1_thresh_low); 516 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_LOW, 517 AR_PHY_SFCORR_LOW_M2_THRESH_LOW, m2_thresh_low); 518 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR, AR_PHY_SFCORR_M1_THRESH, 519 m1_thresh); 520 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR, AR_PHY_SFCORR_M2_THRESH, 521 m2_thresh); 522 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR, AR_PHY_SFCORR_M2COUNT_THR, 523 m2_count_thr); 524 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_LOW, 525 AR_PHY_SFCORR_LOW_M2COUNT_THR_LOW, m2_count_thr_low); 526 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT, 527 AR_PHY_SFCORR_EXT_M1_THRESH_LOW, m1_thresh_low_ext); 528 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT, 529 AR_PHY_SFCORR_EXT_M2_THRESH_LOW, m2_thresh_low_ext); 530 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT, AR_PHY_SFCORR_EXT_M1_THRESH, 531 m1_thresh_ext); 532 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT, AR_PHY_SFCORR_EXT_M2_THRESH, 533 m2_thresh_ext); 534 skip_ws_det: 535 if (is_on) { 536 OS_REG_SET_BIT(ah, AR_PHY_SFCORR_LOW, 537 AR_PHY_SFCORR_LOW_USE_SELF_CORR_LOW); 538 } else { 539 OS_REG_CLR_BIT(ah, AR_PHY_SFCORR_LOW, 540 AR_PHY_SFCORR_LOW_USE_SELF_CORR_LOW); 541 } 542 if ((!is_on) != ani_state->ofdm_weak_sig_detect_off) { 543 HALDEBUG(ah, HAL_DEBUG_ANI, 544 "%s: ** ch %d: ofdm weak signal: %s=>%s\n", 545 __func__, chan->ic_freq, 546 !ani_state->ofdm_weak_sig_detect_off ? "on" : "off", 547 is_on ? "on" : "off"); 548 if (is_on) { 549 ahp->ah_stats.ast_ani_ofdmon++; 550 } else { 551 ahp->ah_stats.ast_ani_ofdmoff++; 552 } 553 ani_state->ofdm_weak_sig_detect_off = !is_on; 554 } 555 break; 556 } 557 case HAL_ANI_FIRSTEP_LEVEL: 558 if (level >= ARRAY_LENGTH(firstep_table)) { 559 HALDEBUG(ah, HAL_DEBUG_UNMASKABLE, 560 "%s: HAL_ANI_FIRSTEP_LEVEL level out of range (%u > %u)\n", 561 __func__, level, (unsigned) ARRAY_LENGTH(firstep_table)); 562 return AH_FALSE; 563 } 564 /* 565 * make register setting relative to default 566 * from INI file & cap value 567 */ 568 value = 569 firstep_table[level] - 570 firstep_table[HAL_ANI_DEF_FIRSTEP_LVL] + 571 ani_state->ini_def.firstep; 572 if (value < HAL_SIG_FIRSTEP_SETTING_MIN) { 573 value = HAL_SIG_FIRSTEP_SETTING_MIN; 574 } 575 if (value > HAL_SIG_FIRSTEP_SETTING_MAX) { 576 value = HAL_SIG_FIRSTEP_SETTING_MAX; 577 } 578 OS_REG_RMW_FIELD(ah, AR_PHY_FIND_SIG, AR_PHY_FIND_SIG_FIRSTEP, value); 579 /* 580 * we need to set first step low register too 581 * make register setting relative to default from INI file & cap value 582 */ 583 value2 = 584 firstep_table[level] - 585 firstep_table[HAL_ANI_DEF_FIRSTEP_LVL] + 586 ani_state->ini_def.firstep_low; 587 if (value2 < HAL_SIG_FIRSTEP_SETTING_MIN) { 588 value2 = HAL_SIG_FIRSTEP_SETTING_MIN; 589 } 590 if (value2 > HAL_SIG_FIRSTEP_SETTING_MAX) { 591 value2 = HAL_SIG_FIRSTEP_SETTING_MAX; 592 } 593 OS_REG_RMW_FIELD(ah, AR_PHY_FIND_SIG_LOW, 594 AR_PHY_FIND_SIG_LOW_FIRSTEP_LOW, value2); 595 596 if (level != ani_state->firstep_level) { 597 HALDEBUG(ah, HAL_DEBUG_ANI, 598 "%s: ** ch %d: level %d=>%d[def:%d] firstep[level]=%d ini=%d\n", 599 __func__, chan->ic_freq, ani_state->firstep_level, level, 600 HAL_ANI_DEF_FIRSTEP_LVL, value, ani_state->ini_def.firstep); 601 HALDEBUG(ah, HAL_DEBUG_ANI, 602 "%s: ** ch %d: level %d=>%d[def:%d] " 603 "firstep_low[level]=%d ini=%d\n", 604 __func__, chan->ic_freq, ani_state->firstep_level, level, 605 HAL_ANI_DEF_FIRSTEP_LVL, value2, 606 ani_state->ini_def.firstep_low); 607 if (level > ani_state->firstep_level) { 608 ahp->ah_stats.ast_ani_stepup++; 609 } else if (level < ani_state->firstep_level) { 610 ahp->ah_stats.ast_ani_stepdown++; 611 } 612 ani_state->firstep_level = level; 613 } 614 break; 615 case HAL_ANI_SPUR_IMMUNITY_LEVEL: 616 if (level >= ARRAY_LENGTH(cycpwr_thr1_table)) { 617 HALDEBUG(ah, HAL_DEBUG_UNMASKABLE, 618 "%s: HAL_ANI_SPUR_IMMUNITY_LEVEL level " 619 "out of range (%u > %u)\n", 620 __func__, level, (unsigned) ARRAY_LENGTH(cycpwr_thr1_table)); 621 return AH_FALSE; 622 } 623 /* 624 * make register setting relative to default from INI file & cap value 625 */ 626 value = 627 cycpwr_thr1_table[level] - 628 cycpwr_thr1_table[HAL_ANI_DEF_SPUR_IMMUNE_LVL] + 629 ani_state->ini_def.cycpwr_thr1; 630 if (value < HAL_SIG_SPUR_IMM_SETTING_MIN) { 631 value = HAL_SIG_SPUR_IMM_SETTING_MIN; 632 } 633 if (value > HAL_SIG_SPUR_IMM_SETTING_MAX) { 634 value = HAL_SIG_SPUR_IMM_SETTING_MAX; 635 } 636 OS_REG_RMW_FIELD(ah, AR_PHY_TIMING5, AR_PHY_TIMING5_CYCPWR_THR1, value); 637 638 /* 639 * set AR_PHY_EXT_CCA for extension channel 640 * make register setting relative to default from INI file & cap value 641 */ 642 value2 = 643 cycpwr_thr1_table[level] - 644 cycpwr_thr1_table[HAL_ANI_DEF_SPUR_IMMUNE_LVL] + 645 ani_state->ini_def.cycpwr_thr1_ext; 646 if (value2 < HAL_SIG_SPUR_IMM_SETTING_MIN) { 647 value2 = HAL_SIG_SPUR_IMM_SETTING_MIN; 648 } 649 if (value2 > HAL_SIG_SPUR_IMM_SETTING_MAX) { 650 value2 = HAL_SIG_SPUR_IMM_SETTING_MAX; 651 } 652 OS_REG_RMW_FIELD(ah, AR_PHY_EXT_CCA, AR_PHY_EXT_CYCPWR_THR1, value2); 653 654 if (level != ani_state->spur_immunity_level) { 655 HALDEBUG(ah, HAL_DEBUG_ANI, 656 "%s: ** ch %d: level %d=>%d[def:%d] " 657 "cycpwr_thr1[level]=%d ini=%d\n", 658 __func__, chan->ic_freq, ani_state->spur_immunity_level, level, 659 HAL_ANI_DEF_SPUR_IMMUNE_LVL, value, 660 ani_state->ini_def.cycpwr_thr1); 661 HALDEBUG(ah, HAL_DEBUG_ANI, 662 "%s: ** ch %d: level %d=>%d[def:%d] " 663 "cycpwr_thr1_ext[level]=%d ini=%d\n", 664 __func__, chan->ic_freq, ani_state->spur_immunity_level, level, 665 HAL_ANI_DEF_SPUR_IMMUNE_LVL, value2, 666 ani_state->ini_def.cycpwr_thr1_ext); 667 if (level > ani_state->spur_immunity_level) { 668 ahp->ah_stats.ast_ani_spurup++; 669 } else if (level < ani_state->spur_immunity_level) { 670 ahp->ah_stats.ast_ani_spurdown++; 671 } 672 ani_state->spur_immunity_level = level; 673 } 674 break; 675 case HAL_ANI_MRC_CCK: 676 /* 677 * is_on == 1 means MRC CCK ON (default, less noise imm) 678 * is_on == 0 means MRC CCK is OFF (more noise imm) 679 */ 680 is_on = param ? 1 : 0; 681 if (!AR_SREV_POSEIDON(ah)) { 682 OS_REG_RMW_FIELD(ah, AR_PHY_MRC_CCK_CTRL, 683 AR_PHY_MRC_CCK_ENABLE, is_on); 684 OS_REG_RMW_FIELD(ah, AR_PHY_MRC_CCK_CTRL, 685 AR_PHY_MRC_CCK_MUX_REG, is_on); 686 } 687 if ((!is_on) != ani_state->mrc_cck_off) { 688 HALDEBUG(ah, HAL_DEBUG_ANI, 689 "%s: ** ch %d: MRC CCK: %s=>%s\n", __func__, chan->ic_freq, 690 !ani_state->mrc_cck_off ? "on" : "off", is_on ? "on" : "off"); 691 if (is_on) { 692 ahp->ah_stats.ast_ani_ccklow++; 693 } else { 694 ahp->ah_stats.ast_ani_cckhigh++; 695 } 696 ani_state->mrc_cck_off = !is_on; 697 } 698 break; 699 case HAL_ANI_PRESENT: 700 break; 701 #ifdef AH_PRIVATE_DIAG 702 case HAL_ANI_MODE: 703 if (param == 0) { 704 ahp->ah_proc_phy_err &= ~HAL_PROCESS_ANI; 705 /* Turn off HW counters if we have them */ 706 ar9300_ani_detach(ah); 707 if (AH_PRIVATE(ah)->ah_curchan == NULL) { 708 return AH_TRUE; 709 } 710 /* if we're turning off ANI, reset regs back to INI settings */ 711 if (ah->ah_config.ath_hal_enable_ani) { 712 HAL_ANI_CMD savefunc = ahp->ah_ani_function; 713 /* temporarly allow all functions so we can reset */ 714 ahp->ah_ani_function = HAL_ANI_ALL; 715 HALDEBUG(ah, HAL_DEBUG_ANI, 716 "%s: disable all ANI functions\n", __func__); 717 ar9300_ani_set_odfm_noise_immunity_level( 718 ah, HAL_ANI_OFDM_DEF_LEVEL); 719 ar9300_ani_set_cck_noise_immunity_level( 720 ah, HAL_ANI_CCK_DEF_LEVEL); 721 ahp->ah_ani_function = savefunc; 722 } 723 } else { /* normal/auto mode */ 724 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: enabled\n", __func__); 725 ahp->ah_proc_phy_err |= HAL_PROCESS_ANI; 726 if (AH_PRIVATE(ah)->ah_curchan == NULL) { 727 return AH_TRUE; 728 } 729 ar9300_enable_mib_counters(ah); 730 ar9300_ani_reset(ah, AH_FALSE); 731 ani_state = ahp->ah_curani; 732 } 733 HALDEBUG(ah, HAL_DEBUG_ANI, "5 ANC: ahp->ah_proc_phy_err %x \n", 734 ahp->ah_proc_phy_err); 735 break; 736 case HAL_ANI_PHYERR_RESET: 737 ahp->ah_stats.ast_ani_ofdmerrs = 0; 738 ahp->ah_stats.ast_ani_cckerrs = 0; 739 break; 740 #endif /* AH_PRIVATE_DIAG */ 741 default: 742 #if HAL_ANI_DEBUG 743 HALDEBUG(ah, HAL_DEBUG_ANI, 744 "%s: invalid cmd 0x%02x (allowed=0x%02x)\n", 745 __func__, cmd, ahp->ah_ani_function); 746 #endif 747 return AH_FALSE; 748 } 749 750 #if HAL_ANI_DEBUG 751 HALDEBUG(ah, HAL_DEBUG_ANI, 752 "%s: ANI parameters: SI=%d, ofdm_ws=%s FS=%d MRCcck=%s listen_time=%d " 753 "CC=%d listen=%d ofdm_errs=%d cck_errs=%d\n", 754 __func__, ani_state->spur_immunity_level, 755 !ani_state->ofdm_weak_sig_detect_off ? "on" : "off", 756 ani_state->firstep_level, !ani_state->mrc_cck_off ? "on" : "off", 757 ani_state->listen_time, ani_state->cycle_count, 758 ani_state->listen_time, ani_state->ofdm_phy_err_count, 759 ani_state->cck_phy_err_count); 760 #endif 761 762 #ifndef REMOVE_PKT_LOG 763 /* do pktlog */ 764 { 765 struct log_ani log_data; 766 767 /* Populate the ani log record */ 768 log_data.phy_stats_disable = DO_ANI(ah); 769 log_data.noise_immun_lvl = ani_state->ofdm_noise_immunity_level; 770 log_data.spur_immun_lvl = ani_state->spur_immunity_level; 771 log_data.ofdm_weak_det = ani_state->ofdm_weak_sig_detect_off; 772 log_data.cck_weak_thr = ani_state->cck_noise_immunity_level; 773 log_data.fir_lvl = ani_state->firstep_level; 774 log_data.listen_time = ani_state->listen_time; 775 log_data.cycle_count = ani_state->cycle_count; 776 /* express ofdm_phy_err_count as errors/second */ 777 log_data.ofdm_phy_err_count = ani_state->listen_time ? 778 ani_state->ofdm_phy_err_count * 1000 / ani_state->listen_time : 0; 779 /* express cck_phy_err_count as errors/second */ 780 log_data.cck_phy_err_count = ani_state->listen_time ? 781 ani_state->cck_phy_err_count * 1000 / ani_state->listen_time : 0; 782 log_data.rssi = ani_state->rssi; 783 784 /* clear interrupt context flag */ 785 ath_hal_log_ani(AH_PRIVATE(ah)->ah_sc, &log_data, 0); 786 } 787 #endif 788 789 return AH_TRUE; 790 } 791 792 static void 793 ar9300_ani_restart(struct ath_hal *ah) 794 { 795 struct ath_hal_9300 *ahp = AH9300(ah); 796 struct ar9300_ani_state *ani_state; 797 798 if (!DO_ANI(ah)) { 799 return; 800 } 801 802 ani_state = ahp->ah_curani; 803 804 ani_state->listen_time = 0; 805 806 OS_REG_WRITE(ah, AR_PHY_ERR_1, 0); 807 OS_REG_WRITE(ah, AR_PHY_ERR_2, 0); 808 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_1, AR_PHY_ERR_OFDM_TIMING); 809 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING); 810 811 /* Clear the mib counters and save them in the stats */ 812 ar9300_update_mib_mac_stats(ah); 813 814 ani_state->ofdm_phy_err_count = 0; 815 ani_state->cck_phy_err_count = 0; 816 } 817 818 static void 819 ar9300_ani_ofdm_err_trigger(struct ath_hal *ah) 820 { 821 struct ath_hal_9300 *ahp = AH9300(ah); 822 struct ar9300_ani_state *ani_state; 823 824 if (!DO_ANI(ah)) { 825 return; 826 } 827 828 ani_state = ahp->ah_curani; 829 830 if (ani_state->ofdm_noise_immunity_level < HAL_ANI_OFDM_MAX_LEVEL) { 831 ar9300_ani_set_odfm_noise_immunity_level( 832 ah, ani_state->ofdm_noise_immunity_level + 1); 833 } 834 } 835 836 static void 837 ar9300_ani_cck_err_trigger(struct ath_hal *ah) 838 { 839 struct ath_hal_9300 *ahp = AH9300(ah); 840 struct ar9300_ani_state *ani_state; 841 842 if (!DO_ANI(ah)) { 843 return; 844 } 845 846 ani_state = ahp->ah_curani; 847 848 if (ani_state->cck_noise_immunity_level < HAL_ANI_CCK_MAX_LEVEL) { 849 ar9300_ani_set_cck_noise_immunity_level( 850 ah, ani_state->cck_noise_immunity_level + 1); 851 } 852 } 853 854 /* 855 * Restore the ANI parameters in the HAL and reset the statistics. 856 * This routine should be called for every hardware reset and for 857 * every channel change. 858 */ 859 void 860 ar9300_ani_reset(struct ath_hal *ah, HAL_BOOL is_scanning) 861 { 862 struct ath_hal_9300 *ahp = AH9300(ah); 863 struct ar9300_ani_state *ani_state; 864 const struct ieee80211_channel *chan = AH_PRIVATE(ah)->ah_curchan; 865 HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan); 866 int index; 867 868 HALASSERT(chan != AH_NULL); 869 870 if (!DO_ANI(ah)) { 871 return; 872 } 873 874 /* 875 * we need to re-point to the correct ANI state since the channel 876 * may have changed due to a fast channel change 877 */ 878 index = ar9300_get_ani_channel_index(ah, chan); 879 ani_state = &ahp->ah_ani[index]; 880 HALASSERT(ani_state != AH_NULL); 881 ahp->ah_curani = ani_state; 882 883 ahp->ah_stats.ast_ani_reset++; 884 885 ani_state->phy_noise_spur = 0; 886 887 /* only allow a subset of functions in AP mode */ 888 if (AH_PRIVATE(ah)->ah_opmode == HAL_M_HOSTAP) { 889 if (IS_CHAN_2GHZ(ichan)) { 890 ahp->ah_ani_function = (HAL_ANI_SPUR_IMMUNITY_LEVEL | 891 HAL_ANI_FIRSTEP_LEVEL | 892 HAL_ANI_MRC_CCK); 893 } else { 894 ahp->ah_ani_function = 0; 895 } 896 } 897 /* always allow mode (on/off) to be controlled */ 898 ahp->ah_ani_function |= HAL_ANI_MODE; 899 900 if (is_scanning || 901 (AH_PRIVATE(ah)->ah_opmode != HAL_M_STA && 902 AH_PRIVATE(ah)->ah_opmode != HAL_M_IBSS)) 903 { 904 /* 905 * If we're scanning or in AP mode, the defaults (ini) should be 906 * in place. 907 * For an AP we assume the historical levels for this channel are 908 * probably outdated so start from defaults instead. 909 */ 910 if (ani_state->ofdm_noise_immunity_level != HAL_ANI_OFDM_DEF_LEVEL || 911 ani_state->cck_noise_immunity_level != HAL_ANI_CCK_DEF_LEVEL) 912 { 913 HALDEBUG(ah, HAL_DEBUG_ANI, 914 "%s: Restore defaults: opmode %u chan %d Mhz/0x%x " 915 "is_scanning=%d restore=%d ofdm:%d cck:%d\n", 916 __func__, AH_PRIVATE(ah)->ah_opmode, chan->ic_freq, 917 chan->ic_flags, is_scanning, ani_state->must_restore, 918 ani_state->ofdm_noise_immunity_level, 919 ani_state->cck_noise_immunity_level); 920 /* 921 * for STA/IBSS, we want to restore the historical values later 922 * (when we're not scanning) 923 */ 924 if (AH_PRIVATE(ah)->ah_opmode == HAL_M_STA || 925 AH_PRIVATE(ah)->ah_opmode == HAL_M_IBSS) 926 { 927 ar9300_ani_control(ah, HAL_ANI_SPUR_IMMUNITY_LEVEL, 928 HAL_ANI_DEF_SPUR_IMMUNE_LVL); 929 ar9300_ani_control( 930 ah, HAL_ANI_FIRSTEP_LEVEL, HAL_ANI_DEF_FIRSTEP_LVL); 931 ar9300_ani_control(ah, HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION, 932 HAL_ANI_USE_OFDM_WEAK_SIG); 933 ar9300_ani_control(ah, HAL_ANI_MRC_CCK, HAL_ANI_ENABLE_MRC_CCK); 934 ani_state->must_restore = AH_TRUE; 935 } else { 936 ar9300_ani_set_odfm_noise_immunity_level( 937 ah, HAL_ANI_OFDM_DEF_LEVEL); 938 ar9300_ani_set_cck_noise_immunity_level( 939 ah, HAL_ANI_CCK_DEF_LEVEL); 940 } 941 } 942 } else { 943 /* 944 * restore historical levels for this channel 945 */ 946 HALDEBUG(ah, HAL_DEBUG_ANI, 947 "%s: Restore history: opmode %u chan %d Mhz/0x%x is_scanning=%d " 948 "restore=%d ofdm:%d cck:%d\n", 949 __func__, AH_PRIVATE(ah)->ah_opmode, chan->ic_freq, 950 chan->ic_flags, is_scanning, ani_state->must_restore, 951 ani_state->ofdm_noise_immunity_level, 952 ani_state->cck_noise_immunity_level); 953 ar9300_ani_set_odfm_noise_immunity_level( 954 ah, ani_state->ofdm_noise_immunity_level); 955 ar9300_ani_set_cck_noise_immunity_level( 956 ah, ani_state->cck_noise_immunity_level); 957 ani_state->must_restore = AH_FALSE; 958 } 959 960 /* enable phy counters */ 961 ar9300_ani_restart(ah); 962 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_1, AR_PHY_ERR_OFDM_TIMING); 963 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING); 964 } 965 966 /* 967 * Process a MIB interrupt. We may potentially be invoked because 968 * any of the MIB counters overflow/trigger so don't assume we're 969 * here because a PHY error counter triggered. 970 */ 971 void 972 ar9300_process_mib_intr(struct ath_hal *ah, const HAL_NODE_STATS *stats) 973 { 974 struct ath_hal_9300 *ahp = AH9300(ah); 975 u_int32_t phy_cnt1, phy_cnt2; 976 977 #if 0 978 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: Processing Mib Intr\n", __func__); 979 #endif 980 981 /* Reset these counters regardless */ 982 OS_REG_WRITE(ah, AR_FILT_OFDM, 0); 983 OS_REG_WRITE(ah, AR_FILT_CCK, 0); 984 if (!(OS_REG_READ(ah, AR_SLP_MIB_CTRL) & AR_SLP_MIB_PENDING)) { 985 OS_REG_WRITE(ah, AR_SLP_MIB_CTRL, AR_SLP_MIB_CLEAR); 986 } 987 988 /* Clear the mib counters and save them in the stats */ 989 ar9300_update_mib_mac_stats(ah); 990 ahp->ah_stats.ast_nodestats = *stats; 991 992 if (!DO_ANI(ah)) { 993 /* 994 * We must always clear the interrupt cause by resetting 995 * the phy error regs. 996 */ 997 OS_REG_WRITE(ah, AR_PHY_ERR_1, 0); 998 OS_REG_WRITE(ah, AR_PHY_ERR_2, 0); 999 return; 1000 } 1001 1002 /* NB: these are not reset-on-read */ 1003 phy_cnt1 = OS_REG_READ(ah, AR_PHY_ERR_1); 1004 phy_cnt2 = OS_REG_READ(ah, AR_PHY_ERR_2); 1005 #if HAL_ANI_DEBUG 1006 HALDEBUG(ah, HAL_DEBUG_ANI, 1007 "%s: Errors: OFDM=0x%08x-0x0=%d CCK=0x%08x-0x0=%d\n", 1008 __func__, phy_cnt1, phy_cnt1, phy_cnt2, phy_cnt2); 1009 #endif 1010 if (((phy_cnt1 & AR_MIBCNT_INTRMASK) == AR_MIBCNT_INTRMASK) || 1011 ((phy_cnt2 & AR_MIBCNT_INTRMASK) == AR_MIBCNT_INTRMASK)) { 1012 /* NB: always restart to insure the h/w counters are reset */ 1013 ar9300_ani_restart(ah); 1014 } 1015 } 1016 1017 1018 static void 1019 ar9300_ani_lower_immunity(struct ath_hal *ah) 1020 { 1021 struct ath_hal_9300 *ahp = AH9300(ah); 1022 struct ar9300_ani_state *ani_state = ahp->ah_curani; 1023 1024 if (ani_state->ofdm_noise_immunity_level > 0 && 1025 (ani_state->ofdms_turn || ani_state->cck_noise_immunity_level == 0)) { 1026 /* 1027 * lower OFDM noise immunity 1028 */ 1029 ar9300_ani_set_odfm_noise_immunity_level( 1030 ah, ani_state->ofdm_noise_immunity_level - 1); 1031 1032 /* 1033 * only lower either OFDM or CCK errors per turn 1034 * we lower the other one next time 1035 */ 1036 return; 1037 } 1038 1039 if (ani_state->cck_noise_immunity_level > 0) { 1040 /* 1041 * lower CCK noise immunity 1042 */ 1043 ar9300_ani_set_cck_noise_immunity_level( 1044 ah, ani_state->cck_noise_immunity_level - 1); 1045 } 1046 } 1047 1048 /* convert HW counter values to ms using mode specifix clock rate */ 1049 //#define CLOCK_RATE(_ah) (ath_hal_chan_2_clock_rate_mhz(_ah) * 1000) 1050 #define CLOCK_RATE(_ah) (ath_hal_mac_clks(ah, 1000)) 1051 1052 /* 1053 * Return an approximation of the time spent ``listening'' by 1054 * deducting the cycles spent tx'ing and rx'ing from the total 1055 * cycle count since our last call. A return value <0 indicates 1056 * an invalid/inconsistent time. 1057 */ 1058 static int32_t 1059 ar9300_ani_get_listen_time(struct ath_hal *ah, HAL_ANISTATS *ani_stats) 1060 { 1061 struct ath_hal_9300 *ahp = AH9300(ah); 1062 struct ar9300_ani_state *ani_state; 1063 u_int32_t tx_frame_count, rx_frame_count, cycle_count; 1064 u_int32_t rx_busy_count, rx_ext_busy_count; 1065 int32_t listen_time; 1066 1067 tx_frame_count = OS_REG_READ(ah, AR_TFCNT); 1068 rx_frame_count = OS_REG_READ(ah, AR_RFCNT); 1069 rx_busy_count = OS_REG_READ(ah, AR_RCCNT); 1070 rx_ext_busy_count = OS_REG_READ(ah, AR_EXTRCCNT); 1071 cycle_count = OS_REG_READ(ah, AR_CCCNT); 1072 1073 ani_state = ahp->ah_curani; 1074 if (ani_state->cycle_count == 0 || ani_state->cycle_count > cycle_count) { 1075 /* 1076 * Cycle counter wrap (or initial call); it's not possible 1077 * to accurately calculate a value because the registers 1078 * right shift rather than wrap--so punt and return 0. 1079 */ 1080 listen_time = 0; 1081 ahp->ah_stats.ast_ani_lzero++; 1082 #if HAL_ANI_DEBUG 1083 HALDEBUG(ah, HAL_DEBUG_ANI, 1084 "%s: 1st call: ani_state->cycle_count=%d\n", 1085 __func__, ani_state->cycle_count); 1086 #endif 1087 } else { 1088 int32_t ccdelta = cycle_count - ani_state->cycle_count; 1089 int32_t rfdelta = rx_frame_count - ani_state->rx_frame_count; 1090 int32_t tfdelta = tx_frame_count - ani_state->tx_frame_count; 1091 int32_t rcdelta = rx_busy_count - ani_state->rx_busy_count; 1092 int32_t extrcdelta = rx_ext_busy_count - ani_state->rx_ext_busy_count; 1093 listen_time = (ccdelta - rfdelta - tfdelta) / CLOCK_RATE(ah); 1094 //#if HAL_ANI_DEBUG 1095 HALDEBUG(ah, HAL_DEBUG_ANI, 1096 "%s: cyclecount=%d, rfcount=%d, tfcount=%d, rcdelta=%d, extrcdelta=%d, listen_time=%d " 1097 "CLOCK_RATE=%d\n", 1098 __func__, ccdelta, rfdelta, tfdelta, rcdelta, extrcdelta, 1099 listen_time, CLOCK_RATE(ah)); 1100 //#endif 1101 /* Populate as appropriate */ 1102 ani_stats->cyclecnt_diff = ccdelta; 1103 ani_stats->rxclr_cnt = rcdelta; 1104 ani_stats->txframecnt_diff = tfdelta; 1105 ani_stats->rxframecnt_diff = rfdelta; 1106 ani_stats->extrxclr_cnt = extrcdelta; 1107 ani_stats->listen_time = listen_time; 1108 ani_stats->valid = AH_TRUE; 1109 } 1110 ani_state->cycle_count = cycle_count; 1111 ani_state->tx_frame_count = tx_frame_count; 1112 ani_state->rx_frame_count = rx_frame_count; 1113 ani_state->rx_busy_count = rx_busy_count; 1114 ani_state->rx_ext_busy_count = rx_ext_busy_count; 1115 return listen_time; 1116 } 1117 1118 /* 1119 * Do periodic processing. This routine is called from a timer 1120 */ 1121 void 1122 ar9300_ani_ar_poll(struct ath_hal *ah, const HAL_NODE_STATS *stats, 1123 const struct ieee80211_channel *chan, HAL_ANISTATS *ani_stats) 1124 { 1125 struct ath_hal_9300 *ahp = AH9300(ah); 1126 struct ar9300_ani_state *ani_state; 1127 int32_t listen_time; 1128 u_int32_t ofdm_phy_err_rate, cck_phy_err_rate; 1129 u_int32_t ofdm_phy_err_cnt, cck_phy_err_cnt; 1130 HAL_BOOL old_phy_noise_spur; 1131 1132 ani_state = ahp->ah_curani; 1133 ahp->ah_stats.ast_nodestats = *stats; /* XXX optimize? */ 1134 1135 if (ani_state == NULL) { 1136 /* should not happen */ 1137 HALDEBUG(ah, HAL_DEBUG_UNMASKABLE, 1138 "%s: can't poll - no ANI not initialized for this channel\n", 1139 __func__); 1140 return; 1141 } 1142 1143 /* 1144 * ar9300_ani_ar_poll is never called while scanning but we may have been 1145 * scanning and now just restarted polling. In this case we need to 1146 * restore historical values. 1147 */ 1148 if (ani_state->must_restore) { 1149 HALDEBUG(ah, HAL_DEBUG_ANI, 1150 "%s: must restore - calling ar9300_ani_restart\n", __func__); 1151 ar9300_ani_reset(ah, AH_FALSE); 1152 return; 1153 } 1154 1155 listen_time = ar9300_ani_get_listen_time(ah, ani_stats); 1156 if (listen_time <= 0) { 1157 ahp->ah_stats.ast_ani_lneg++; 1158 /* restart ANI period if listen_time is invalid */ 1159 HALDEBUG(ah, HAL_DEBUG_ANI, 1160 "%s: listen_time=%d - calling ar9300_ani_restart\n", 1161 __func__, listen_time); 1162 ar9300_ani_restart(ah); 1163 return; 1164 } 1165 /* XXX beware of overflow? */ 1166 ani_state->listen_time += listen_time; 1167 1168 /* Clear the mib counters and save them in the stats */ 1169 ar9300_update_mib_mac_stats(ah); 1170 /* NB: these are not reset-on-read */ 1171 ofdm_phy_err_cnt = OS_REG_READ(ah, AR_PHY_ERR_1); 1172 cck_phy_err_cnt = OS_REG_READ(ah, AR_PHY_ERR_2); 1173 1174 /* Populate HAL_ANISTATS */ 1175 if (ani_stats) { 1176 ani_stats->cckphyerr_cnt = 1177 cck_phy_err_cnt - ani_state->cck_phy_err_count; 1178 ani_stats->ofdmphyerrcnt_diff = 1179 ofdm_phy_err_cnt - ani_state->ofdm_phy_err_count; 1180 } 1181 1182 /* NB: only use ast_ani_*errs with AH_PRIVATE_DIAG */ 1183 ahp->ah_stats.ast_ani_ofdmerrs += 1184 ofdm_phy_err_cnt - ani_state->ofdm_phy_err_count; 1185 ani_state->ofdm_phy_err_count = ofdm_phy_err_cnt; 1186 1187 ahp->ah_stats.ast_ani_cckerrs += 1188 cck_phy_err_cnt - ani_state->cck_phy_err_count; 1189 ani_state->cck_phy_err_count = cck_phy_err_cnt; 1190 1191 #if HAL_ANI_DEBUG 1192 HALDEBUG(ah, HAL_DEBUG_ANI, 1193 "%s: Errors: OFDM=0x%08x-0x0=%d CCK=0x%08x-0x0=%d\n", 1194 __func__, ofdm_phy_err_cnt, ofdm_phy_err_cnt, 1195 cck_phy_err_cnt, cck_phy_err_cnt); 1196 #endif 1197 1198 /* 1199 * If ani is not enabled, return after we've collected 1200 * statistics 1201 */ 1202 if (!DO_ANI(ah)) { 1203 return; 1204 } 1205 1206 ofdm_phy_err_rate = 1207 ani_state->ofdm_phy_err_count * 1000 / ani_state->listen_time; 1208 cck_phy_err_rate = 1209 ani_state->cck_phy_err_count * 1000 / ani_state->listen_time; 1210 1211 HALDEBUG(ah, HAL_DEBUG_ANI, 1212 "%s: listen_time=%d OFDM:%d errs=%d/s CCK:%d errs=%d/s ofdm_turn=%d\n", 1213 __func__, listen_time, 1214 ani_state->ofdm_noise_immunity_level, ofdm_phy_err_rate, 1215 ani_state->cck_noise_immunity_level, cck_phy_err_rate, 1216 ani_state->ofdms_turn); 1217 1218 if (ani_state->listen_time >= HAL_NOISE_DETECT_PERIOD) { 1219 old_phy_noise_spur = ani_state->phy_noise_spur; 1220 if (ofdm_phy_err_rate <= ani_state->ofdm_trig_low && 1221 cck_phy_err_rate <= ani_state->cck_trig_low) { 1222 if (ani_state->listen_time >= HAL_NOISE_RECOVER_PERIOD) { 1223 ani_state->phy_noise_spur = 0; 1224 } 1225 } else { 1226 ani_state->phy_noise_spur = 1; 1227 } 1228 if (old_phy_noise_spur != ani_state->phy_noise_spur) { 1229 HALDEBUG(ah, HAL_DEBUG_ANI, 1230 "%s: environment change from %d to %d\n", 1231 __func__, old_phy_noise_spur, ani_state->phy_noise_spur); 1232 } 1233 } 1234 1235 if (ani_state->listen_time > 5 * ahp->ah_ani_period) { 1236 /* 1237 * Check to see if need to lower immunity if 1238 * 5 ani_periods have passed 1239 */ 1240 if (ofdm_phy_err_rate <= ani_state->ofdm_trig_low && 1241 cck_phy_err_rate <= ani_state->cck_trig_low) 1242 { 1243 HALDEBUG(ah, HAL_DEBUG_ANI, 1244 "%s: 1. listen_time=%d OFDM:%d errs=%d/s(<%d) " 1245 "CCK:%d errs=%d/s(<%d) -> ar9300_ani_lower_immunity\n", 1246 __func__, ani_state->listen_time, 1247 ani_state->ofdm_noise_immunity_level, ofdm_phy_err_rate, 1248 ani_state->ofdm_trig_low, ani_state->cck_noise_immunity_level, 1249 cck_phy_err_rate, ani_state->cck_trig_low); 1250 ar9300_ani_lower_immunity(ah); 1251 ani_state->ofdms_turn = !ani_state->ofdms_turn; 1252 } 1253 HALDEBUG(ah, HAL_DEBUG_ANI, 1254 "%s: 1 listen_time=%d ofdm=%d/s cck=%d/s - " 1255 "calling ar9300_ani_restart\n", 1256 __func__, ani_state->listen_time, 1257 ofdm_phy_err_rate, cck_phy_err_rate); 1258 ar9300_ani_restart(ah); 1259 } else if (ani_state->listen_time > ahp->ah_ani_period) { 1260 /* check to see if need to raise immunity */ 1261 if (ofdm_phy_err_rate > ani_state->ofdm_trig_high && 1262 (cck_phy_err_rate <= ani_state->cck_trig_high || 1263 ani_state->ofdms_turn)) 1264 { 1265 HALDEBUG(ah, HAL_DEBUG_ANI, 1266 "%s: 2 listen_time=%d OFDM:%d errs=%d/s(>%d) -> " 1267 "ar9300_ani_ofdm_err_trigger\n", 1268 __func__, ani_state->listen_time, 1269 ani_state->ofdm_noise_immunity_level, ofdm_phy_err_rate, 1270 ani_state->ofdm_trig_high); 1271 ar9300_ani_ofdm_err_trigger(ah); 1272 ar9300_ani_restart(ah); 1273 ani_state->ofdms_turn = AH_FALSE; 1274 } else if (cck_phy_err_rate > ani_state->cck_trig_high) { 1275 HALDEBUG(ah, HAL_DEBUG_ANI, 1276 "%s: 3 listen_time=%d CCK:%d errs=%d/s(>%d) -> " 1277 "ar9300_ani_cck_err_trigger\n", 1278 __func__, ani_state->listen_time, 1279 ani_state->cck_noise_immunity_level, cck_phy_err_rate, 1280 ani_state->cck_trig_high); 1281 ar9300_ani_cck_err_trigger(ah); 1282 ar9300_ani_restart(ah); 1283 ani_state->ofdms_turn = AH_TRUE; 1284 } 1285 } 1286 } 1287 1288 /* 1289 * The poll function above calculates short noise spurs, caused by non-80211 1290 * devices, based on OFDM/CCK Phy errs. 1291 * If the noise is short enough, we don't want our ratectrl Algo to stop probing 1292 * higher rates, due to bad PER. 1293 */ 1294 HAL_BOOL 1295 ar9300_is_ani_noise_spur(struct ath_hal *ah) 1296 { 1297 struct ath_hal_9300 *ahp = AH9300(ah); 1298 struct ar9300_ani_state *ani_state; 1299 1300 ani_state = ahp->ah_curani; 1301 1302 return ani_state->phy_noise_spur; 1303 } 1304 1305