1 /*
2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
3 * Copyright (c) 2002-2008 Atheros Communications, Inc.
4 *
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 *
17 * $FreeBSD$
18 */
19 #include "opt_ah.h"
20
21 /*
22 * XXX this is virtually the same code as for 5212; we reuse
23 * storage in the 5212 state block; need to refactor.
24 */
25 #include "ah.h"
26 #include "ah_internal.h"
27 #include "ah_desc.h"
28
29 #include "ar5416/ar5416.h"
30 #include "ar5416/ar5416reg.h"
31 #include "ar5416/ar5416phy.h"
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 #define HAL_EP_RND(x, mul) \
39 ((((x)%(mul)) >= ((mul)/2)) ? ((x) + ((mul) - 1)) / (mul) : (x)/(mul))
40 #define BEACON_RSSI(ahp) \
41 HAL_EP_RND(ahp->ah_stats.ast_nodestats.ns_avgbrssi, \
42 HAL_RSSI_EP_MULTIPLIER)
43
44 /*
45 * ANI processing tunes radio parameters according to PHY errors
46 * and related information. This is done for for noise and spur
47 * immunity in all operating modes if the device indicates it's
48 * capable at attach time. In addition, when there is a reference
49 * rssi value (e.g. beacon frames from an ap in station mode)
50 * further tuning is done.
51 *
52 * ANI_ENA indicates whether any ANI processing should be done;
53 * this is specified at attach time.
54 *
55 * ANI_ENA_RSSI indicates whether rssi-based processing should
56 * done, this is enabled based on operating mode and is meaningful
57 * only if ANI_ENA is true.
58 *
59 * ANI parameters are typically controlled only by the hal. The
60 * AniControl interface however permits manual tuning through the
61 * diagnostic api.
62 */
63 #define ANI_ENA(ah) \
64 (AH5212(ah)->ah_procPhyErr & HAL_ANI_ENA)
65 #define ANI_ENA_RSSI(ah) \
66 (AH5212(ah)->ah_procPhyErr & HAL_RSSI_ANI_ENA)
67
68 #define ah_mibStats ah_stats.ast_mibstats
69
70 static void
enableAniMIBCounters(struct ath_hal * ah,const struct ar5212AniParams * params)71 enableAniMIBCounters(struct ath_hal *ah, const struct ar5212AniParams *params)
72 {
73 struct ath_hal_5212 *ahp = AH5212(ah);
74
75 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: Enable mib counters: "
76 "OfdmPhyErrBase 0x%x cckPhyErrBase 0x%x\n",
77 __func__, params->ofdmPhyErrBase, params->cckPhyErrBase);
78
79 OS_REG_WRITE(ah, AR_FILTOFDM, 0);
80 OS_REG_WRITE(ah, AR_FILTCCK, 0);
81
82 OS_REG_WRITE(ah, AR_PHYCNT1, params->ofdmPhyErrBase);
83 OS_REG_WRITE(ah, AR_PHYCNT2, params->cckPhyErrBase);
84 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_1, AR_PHY_ERR_OFDM_TIMING);
85 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
86
87 ar5212UpdateMibCounters(ah, &ahp->ah_mibStats); /* save+clear counters*/
88 ar5212EnableMibCounters(ah); /* enable everything */
89 }
90
91 static void
disableAniMIBCounters(struct ath_hal * ah)92 disableAniMIBCounters(struct ath_hal *ah)
93 {
94 struct ath_hal_5212 *ahp = AH5212(ah);
95
96 HALDEBUG(ah, HAL_DEBUG_ANI, "Disable MIB counters\n");
97
98 ar5212UpdateMibCounters(ah, &ahp->ah_mibStats); /* save stats */
99 ar5212DisableMibCounters(ah); /* disable everything */
100
101 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_1, 0);
102 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_2, 0);
103 }
104
105 static void
setPhyErrBase(struct ath_hal * ah,struct ar5212AniParams * params)106 setPhyErrBase(struct ath_hal *ah, struct ar5212AniParams *params)
107 {
108 if (params->ofdmTrigHigh >= AR_PHY_COUNTMAX) {
109 HALDEBUG(ah, HAL_DEBUG_ANY,
110 "OFDM Trigger %d is too high for hw counters, using max\n",
111 params->ofdmTrigHigh);
112 params->ofdmPhyErrBase = 0;
113 } else
114 params->ofdmPhyErrBase = AR_PHY_COUNTMAX - params->ofdmTrigHigh;
115 if (params->cckTrigHigh >= AR_PHY_COUNTMAX) {
116 HALDEBUG(ah, HAL_DEBUG_ANY,
117 "CCK Trigger %d is too high for hw counters, using max\n",
118 params->cckTrigHigh);
119 params->cckPhyErrBase = 0;
120 } else
121 params->cckPhyErrBase = AR_PHY_COUNTMAX - params->cckTrigHigh;
122 }
123
124 /*
125 * Setup ANI handling. Sets all thresholds and reset the
126 * channel statistics. Note that ar5416AniReset should be
127 * called by ar5416Reset before anything else happens and
128 * that's where we force initial settings.
129 */
130 void
ar5416AniAttach(struct ath_hal * ah,const struct ar5212AniParams * params24,const struct ar5212AniParams * params5,HAL_BOOL enable)131 ar5416AniAttach(struct ath_hal *ah, const struct ar5212AniParams *params24,
132 const struct ar5212AniParams *params5, HAL_BOOL enable)
133 {
134 struct ath_hal_5212 *ahp = AH5212(ah);
135
136 if (params24 != AH_NULL) {
137 OS_MEMCPY(&ahp->ah_aniParams24, params24, sizeof(*params24));
138 setPhyErrBase(ah, &ahp->ah_aniParams24);
139 }
140 if (params5 != AH_NULL) {
141 OS_MEMCPY(&ahp->ah_aniParams5, params5, sizeof(*params5));
142 setPhyErrBase(ah, &ahp->ah_aniParams5);
143 }
144
145 OS_MEMZERO(ahp->ah_ani, sizeof(ahp->ah_ani));
146 /* Enable MIB Counters */
147 enableAniMIBCounters(ah, &ahp->ah_aniParams24 /*XXX*/);
148
149 if (enable) { /* Enable ani now */
150 HALASSERT(params24 != AH_NULL && params5 != AH_NULL);
151 ahp->ah_procPhyErr |= HAL_ANI_ENA;
152 } else {
153 ahp->ah_procPhyErr &= ~HAL_ANI_ENA;
154 }
155 }
156
157 /*
158 * Cleanup any ANI state setup.
159 *
160 * This doesn't restore registers to their default settings!
161 */
162 void
ar5416AniDetach(struct ath_hal * ah)163 ar5416AniDetach(struct ath_hal *ah)
164 {
165 HALDEBUG(ah, HAL_DEBUG_ANI, "Detaching Ani\n");
166 disableAniMIBCounters(ah);
167 }
168
169 /*
170 * Control Adaptive Noise Immunity Parameters
171 */
172 HAL_BOOL
ar5416AniControl(struct ath_hal * ah,HAL_ANI_CMD cmd,int param)173 ar5416AniControl(struct ath_hal *ah, HAL_ANI_CMD cmd, int param)
174 {
175 typedef int TABLE[];
176 struct ath_hal_5212 *ahp = AH5212(ah);
177 struct ar5212AniState *aniState = ahp->ah_curani;
178 const struct ar5212AniParams *params = AH_NULL;
179
180 /*
181 * This function may be called before there's a current
182 * channel (eg to disable ANI.)
183 */
184 if (aniState != AH_NULL)
185 params = aniState->params;
186
187 OS_MARK(ah, AH_MARK_ANI_CONTROL, cmd);
188
189 /* These commands can't be disabled */
190 if (cmd == HAL_ANI_PRESENT)
191 return AH_TRUE;
192
193 if (cmd == HAL_ANI_MODE) {
194 if (param == 0) {
195 ahp->ah_procPhyErr &= ~HAL_ANI_ENA;
196 /* Turn off HW counters if we have them */
197 ar5416AniDetach(ah);
198 } else { /* normal/auto mode */
199 /* don't mess with state if already enabled */
200 if (! (ahp->ah_procPhyErr & HAL_ANI_ENA)) {
201 /* Enable MIB Counters */
202 /*
203 * XXX use 2.4ghz params if no channel is
204 * available
205 */
206 enableAniMIBCounters(ah,
207 ahp->ah_curani != AH_NULL ?
208 ahp->ah_curani->params:
209 &ahp->ah_aniParams24);
210 ahp->ah_procPhyErr |= HAL_ANI_ENA;
211 }
212 }
213 return AH_TRUE;
214 }
215
216 /* Check whether the particular function is enabled */
217 if (((1 << cmd) & AH5416(ah)->ah_ani_function) == 0) {
218 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: command %d disabled\n",
219 __func__, cmd);
220 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: cmd %d; mask %x\n", __func__, cmd, AH5416(ah)->ah_ani_function);
221 return AH_FALSE;
222 }
223
224
225 switch (cmd) {
226 case HAL_ANI_NOISE_IMMUNITY_LEVEL: {
227 u_int level = param;
228
229 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: HAL_ANI_NOISE_IMMUNITY_LEVEL: set level = %d\n", __func__, level);
230 if (level > params->maxNoiseImmunityLevel) {
231 HALDEBUG(ah, HAL_DEBUG_ANI,
232 "%s: immunity level out of range (%u > %u)\n",
233 __func__, level, params->maxNoiseImmunityLevel);
234 return AH_FALSE;
235 }
236
237 OS_REG_RMW_FIELD(ah, AR_PHY_DESIRED_SZ,
238 AR_PHY_DESIRED_SZ_TOT_DES, params->totalSizeDesired[level]);
239 OS_REG_RMW_FIELD(ah, AR_PHY_AGC_CTL1,
240 AR_PHY_AGC_CTL1_COARSE_LOW, params->coarseLow[level]);
241 OS_REG_RMW_FIELD(ah, AR_PHY_AGC_CTL1,
242 AR_PHY_AGC_CTL1_COARSE_HIGH, params->coarseHigh[level]);
243 OS_REG_RMW_FIELD(ah, AR_PHY_FIND_SIG,
244 AR_PHY_FIND_SIG_FIRPWR, params->firpwr[level]);
245
246 if (level > aniState->noiseImmunityLevel)
247 ahp->ah_stats.ast_ani_niup++;
248 else if (level < aniState->noiseImmunityLevel)
249 ahp->ah_stats.ast_ani_nidown++;
250 aniState->noiseImmunityLevel = level;
251 break;
252 }
253 case HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION: {
254 static const TABLE m1ThreshLow = { 127, 50 };
255 static const TABLE m2ThreshLow = { 127, 40 };
256 static const TABLE m1Thresh = { 127, 0x4d };
257 static const TABLE m2Thresh = { 127, 0x40 };
258 static const TABLE m2CountThr = { 31, 16 };
259 static const TABLE m2CountThrLow = { 63, 48 };
260 u_int on = param ? 1 : 0;
261
262 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION: %s\n", __func__, on ? "enabled" : "disabled");
263 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_LOW,
264 AR_PHY_SFCORR_LOW_M1_THRESH_LOW, m1ThreshLow[on]);
265 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_LOW,
266 AR_PHY_SFCORR_LOW_M2_THRESH_LOW, m2ThreshLow[on]);
267 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR,
268 AR_PHY_SFCORR_M1_THRESH, m1Thresh[on]);
269 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR,
270 AR_PHY_SFCORR_M2_THRESH, m2Thresh[on]);
271 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR,
272 AR_PHY_SFCORR_M2COUNT_THR, m2CountThr[on]);
273 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_LOW,
274 AR_PHY_SFCORR_LOW_M2COUNT_THR_LOW, m2CountThrLow[on]);
275
276 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT,
277 AR_PHY_SFCORR_EXT_M1_THRESH_LOW, m1ThreshLow[on]);
278 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT,
279 AR_PHY_SFCORR_EXT_M2_THRESH_LOW, m2ThreshLow[on]);
280 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT,
281 AR_PHY_SFCORR_EXT_M1_THRESH, m1Thresh[on]);
282 OS_REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT,
283 AR_PHY_SFCORR_EXT_M2_THRESH, m2Thresh[on]);
284
285 if (on) {
286 OS_REG_SET_BIT(ah, AR_PHY_SFCORR_LOW,
287 AR_PHY_SFCORR_LOW_USE_SELF_CORR_LOW);
288 } else {
289 OS_REG_CLR_BIT(ah, AR_PHY_SFCORR_LOW,
290 AR_PHY_SFCORR_LOW_USE_SELF_CORR_LOW);
291 }
292 if (on)
293 ahp->ah_stats.ast_ani_ofdmon++;
294 else
295 ahp->ah_stats.ast_ani_ofdmoff++;
296 aniState->ofdmWeakSigDetectOff = !on;
297 break;
298 }
299 case HAL_ANI_CCK_WEAK_SIGNAL_THR: {
300 static const TABLE weakSigThrCck = { 8, 6 };
301 u_int high = param ? 1 : 0;
302
303 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: HAL_ANI_CCK_WEAK_SIGNAL_THR: %s\n", __func__, high ? "high" : "low");
304 OS_REG_RMW_FIELD(ah, AR_PHY_CCK_DETECT,
305 AR_PHY_CCK_DETECT_WEAK_SIG_THR_CCK, weakSigThrCck[high]);
306 if (high)
307 ahp->ah_stats.ast_ani_cckhigh++;
308 else
309 ahp->ah_stats.ast_ani_ccklow++;
310 aniState->cckWeakSigThreshold = high;
311 break;
312 }
313 case HAL_ANI_FIRSTEP_LEVEL: {
314 u_int level = param;
315
316 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: HAL_ANI_FIRSTEP_LEVEL: level = %d\n", __func__, level);
317 if (level > params->maxFirstepLevel) {
318 HALDEBUG(ah, HAL_DEBUG_ANI,
319 "%s: firstep level out of range (%u > %u)\n",
320 __func__, level, params->maxFirstepLevel);
321 return AH_FALSE;
322 }
323 OS_REG_RMW_FIELD(ah, AR_PHY_FIND_SIG,
324 AR_PHY_FIND_SIG_FIRSTEP, params->firstep[level]);
325 if (level > aniState->firstepLevel)
326 ahp->ah_stats.ast_ani_stepup++;
327 else if (level < aniState->firstepLevel)
328 ahp->ah_stats.ast_ani_stepdown++;
329 aniState->firstepLevel = level;
330 break;
331 }
332 case HAL_ANI_SPUR_IMMUNITY_LEVEL: {
333 u_int level = param;
334
335 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: HAL_ANI_SPUR_IMMUNITY_LEVEL: level = %d\n", __func__, level);
336 if (level > params->maxSpurImmunityLevel) {
337 HALDEBUG(ah, HAL_DEBUG_ANI,
338 "%s: spur immunity level out of range (%u > %u)\n",
339 __func__, level, params->maxSpurImmunityLevel);
340 return AH_FALSE;
341 }
342 OS_REG_RMW_FIELD(ah, AR_PHY_TIMING5,
343 AR_PHY_TIMING5_CYCPWR_THR1, params->cycPwrThr1[level]);
344
345 if (level > aniState->spurImmunityLevel)
346 ahp->ah_stats.ast_ani_spurup++;
347 else if (level < aniState->spurImmunityLevel)
348 ahp->ah_stats.ast_ani_spurdown++;
349 aniState->spurImmunityLevel = level;
350 break;
351 }
352 #ifdef AH_PRIVATE_DIAG
353 case HAL_ANI_PHYERR_RESET:
354 ahp->ah_stats.ast_ani_ofdmerrs = 0;
355 ahp->ah_stats.ast_ani_cckerrs = 0;
356 break;
357 #endif /* AH_PRIVATE_DIAG */
358 default:
359 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: invalid cmd %u\n",
360 __func__, cmd);
361 return AH_FALSE;
362 }
363 return AH_TRUE;
364 }
365
366 static void
ar5416AniOfdmErrTrigger(struct ath_hal * ah)367 ar5416AniOfdmErrTrigger(struct ath_hal *ah)
368 {
369 struct ath_hal_5212 *ahp = AH5212(ah);
370 const struct ieee80211_channel *chan = AH_PRIVATE(ah)->ah_curchan;
371 struct ar5212AniState *aniState;
372 const struct ar5212AniParams *params;
373
374 HALASSERT(chan != AH_NULL);
375
376 if (!ANI_ENA(ah))
377 return;
378
379 aniState = ahp->ah_curani;
380 params = aniState->params;
381 /* First, raise noise immunity level, up to max */
382 if (aniState->noiseImmunityLevel+1 < params->maxNoiseImmunityLevel) {
383 if (ar5416AniControl(ah, HAL_ANI_NOISE_IMMUNITY_LEVEL,
384 aniState->noiseImmunityLevel + 1))
385 return;
386 }
387 /* then, raise spur immunity level, up to max */
388 if (aniState->spurImmunityLevel+1 < params->maxSpurImmunityLevel) {
389 if (ar5416AniControl(ah, HAL_ANI_SPUR_IMMUNITY_LEVEL,
390 aniState->spurImmunityLevel + 1))
391 return;
392 }
393
394 /*
395 * In the case of AP mode operation, we cannot bucketize beacons
396 * according to RSSI. Instead, raise Firstep level, up to max, and
397 * simply return.
398 */
399 if (AH_PRIVATE(ah)->ah_opmode == HAL_M_HOSTAP) {
400 if (aniState->firstepLevel < params->maxFirstepLevel) {
401 if (ar5416AniControl(ah, HAL_ANI_FIRSTEP_LEVEL,
402 aniState->firstepLevel + 1))
403 return;
404 }
405 }
406 if (ANI_ENA_RSSI(ah)) {
407 int32_t rssi = BEACON_RSSI(ahp);
408 if (rssi > params->rssiThrHigh) {
409 /*
410 * Beacon rssi is high, can turn off ofdm
411 * weak sig detect.
412 */
413 if (!aniState->ofdmWeakSigDetectOff) {
414 ar5416AniControl(ah,
415 HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION,
416 AH_FALSE);
417 ar5416AniControl(ah,
418 HAL_ANI_SPUR_IMMUNITY_LEVEL, 0);
419 return;
420 }
421 /*
422 * If weak sig detect is already off, as last resort,
423 * raise firstep level
424 */
425 if (aniState->firstepLevel < params->maxFirstepLevel) {
426 if (ar5416AniControl(ah, HAL_ANI_FIRSTEP_LEVEL,
427 aniState->firstepLevel + 1))
428 return;
429 }
430 } else if (rssi > params->rssiThrLow) {
431 /*
432 * Beacon rssi in mid range, need ofdm weak signal
433 * detect, but we can raise firststepLevel.
434 */
435 if (aniState->ofdmWeakSigDetectOff)
436 ar5416AniControl(ah,
437 HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION,
438 AH_TRUE);
439 if (aniState->firstepLevel < params->maxFirstepLevel)
440 if (ar5416AniControl(ah, HAL_ANI_FIRSTEP_LEVEL,
441 aniState->firstepLevel + 1))
442 return;
443 } else {
444 /*
445 * Beacon rssi is low, if in 11b/g mode, turn off ofdm
446 * weak signal detection and zero firstepLevel to
447 * maximize CCK sensitivity
448 */
449 if (IEEE80211_IS_CHAN_CCK(chan)) {
450 if (!aniState->ofdmWeakSigDetectOff)
451 ar5416AniControl(ah,
452 HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION,
453 AH_FALSE);
454 if (aniState->firstepLevel > 0)
455 if (ar5416AniControl(ah,
456 HAL_ANI_FIRSTEP_LEVEL, 0))
457 return;
458 }
459 }
460 }
461 }
462
463 static void
ar5416AniCckErrTrigger(struct ath_hal * ah)464 ar5416AniCckErrTrigger(struct ath_hal *ah)
465 {
466 struct ath_hal_5212 *ahp = AH5212(ah);
467 const struct ieee80211_channel *chan = AH_PRIVATE(ah)->ah_curchan;
468 struct ar5212AniState *aniState;
469 const struct ar5212AniParams *params;
470
471 HALASSERT(chan != AH_NULL);
472
473 if (!ANI_ENA(ah))
474 return;
475
476 /* first, raise noise immunity level, up to max */
477 aniState = ahp->ah_curani;
478 params = aniState->params;
479 if ((AH5416(ah)->ah_ani_function & (1 << HAL_ANI_NOISE_IMMUNITY_LEVEL) &&
480 aniState->noiseImmunityLevel+1 < params->maxNoiseImmunityLevel)) {
481 ar5416AniControl(ah, HAL_ANI_NOISE_IMMUNITY_LEVEL,
482 aniState->noiseImmunityLevel + 1);
483 return;
484 }
485
486 if (ANI_ENA_RSSI(ah)) {
487 int32_t rssi = BEACON_RSSI(ahp);
488 if (rssi > params->rssiThrLow) {
489 /*
490 * Beacon signal in mid and high range,
491 * raise firstep level.
492 */
493 if (aniState->firstepLevel < params->maxFirstepLevel)
494 ar5416AniControl(ah, HAL_ANI_FIRSTEP_LEVEL,
495 aniState->firstepLevel + 1);
496 } else {
497 /*
498 * Beacon rssi is low, zero firstep level to maximize
499 * CCK sensitivity in 11b/g mode.
500 */
501 if (IEEE80211_IS_CHAN_CCK(chan)) {
502 if (aniState->firstepLevel > 0)
503 ar5416AniControl(ah,
504 HAL_ANI_FIRSTEP_LEVEL, 0);
505 }
506 }
507 }
508 }
509
510 static void
ar5416AniRestart(struct ath_hal * ah,struct ar5212AniState * aniState)511 ar5416AniRestart(struct ath_hal *ah, struct ar5212AniState *aniState)
512 {
513 struct ath_hal_5212 *ahp = AH5212(ah);
514 const struct ar5212AniParams *params = aniState->params;
515
516 aniState->listenTime = 0;
517 /*
518 * NB: these are written on reset based on the
519 * ini so we must re-write them!
520 */
521 HALDEBUG(ah, HAL_DEBUG_ANI,
522 "%s: Writing ofdmbase=%u cckbase=%u\n", __func__,
523 params->ofdmPhyErrBase, params->cckPhyErrBase);
524 OS_REG_WRITE(ah, AR_PHY_ERR_1, params->ofdmPhyErrBase);
525 OS_REG_WRITE(ah, AR_PHY_ERR_2, params->cckPhyErrBase);
526 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_1, AR_PHY_ERR_OFDM_TIMING);
527 OS_REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
528
529 /* Clear the mib counters and save them in the stats */
530 ar5212UpdateMibCounters(ah, &ahp->ah_mibStats);
531 aniState->ofdmPhyErrCount = 0;
532 aniState->cckPhyErrCount = 0;
533 }
534
535 /*
536 * Restore/reset the ANI parameters and reset the statistics.
537 * This routine must be called for every channel change.
538 *
539 * NOTE: This is where ah_curani is set; other ani code assumes
540 * it is setup to reflect the current channel.
541 */
542 void
ar5416AniReset(struct ath_hal * ah,const struct ieee80211_channel * chan,HAL_OPMODE opmode,int restore)543 ar5416AniReset(struct ath_hal *ah, const struct ieee80211_channel *chan,
544 HAL_OPMODE opmode, int restore)
545 {
546 struct ath_hal_5212 *ahp = AH5212(ah);
547 HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan);
548 /* XXX bounds check ic_devdata */
549 struct ar5212AniState *aniState = &ahp->ah_ani[chan->ic_devdata];
550 uint32_t rxfilter;
551
552 if ((ichan->privFlags & CHANNEL_ANI_INIT) == 0) {
553 OS_MEMZERO(aniState, sizeof(*aniState));
554 if (IEEE80211_IS_CHAN_2GHZ(chan))
555 aniState->params = &ahp->ah_aniParams24;
556 else
557 aniState->params = &ahp->ah_aniParams5;
558 ichan->privFlags |= CHANNEL_ANI_INIT;
559 HALASSERT((ichan->privFlags & CHANNEL_ANI_SETUP) == 0);
560 }
561 ahp->ah_curani = aniState;
562 #if 0
563 ath_hal_printf(ah,"%s: chan %u/0x%x restore %d opmode %u%s\n",
564 __func__, chan->ic_freq, chan->ic_flags, restore, opmode,
565 ichan->privFlags & CHANNEL_ANI_SETUP ? " setup" : "");
566 #else
567 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: chan %u/0x%x restore %d opmode %u%s\n",
568 __func__, chan->ic_freq, chan->ic_flags, restore, opmode,
569 ichan->privFlags & CHANNEL_ANI_SETUP ? " setup" : "");
570 #endif
571 OS_MARK(ah, AH_MARK_ANI_RESET, opmode);
572
573 /*
574 * Turn off PHY error frame delivery while we futz with settings.
575 */
576 rxfilter = ah->ah_getRxFilter(ah);
577 ah->ah_setRxFilter(ah, rxfilter &~ HAL_RX_FILTER_PHYERR);
578
579 /*
580 * If ANI is disabled at this point, don't set the default
581 * ANI parameter settings - leave the HAL settings there.
582 * This is (currently) needed for reliable radar detection.
583 */
584 if (! ANI_ENA(ah)) {
585 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: ANI disabled\n",
586 __func__);
587 goto finish;
588 }
589
590 /*
591 * Use a restrictive set of ANI parameters for hostap mode.
592 */
593 if (opmode == HAL_M_HOSTAP) {
594 if (IEEE80211_IS_CHAN_2GHZ(chan))
595 AH5416(ah)->ah_ani_function =
596 HAL_ANI_SPUR_IMMUNITY_LEVEL | HAL_ANI_FIRSTEP_LEVEL;
597 else
598 AH5416(ah)->ah_ani_function = 0;
599 }
600
601 /*
602 * Automatic processing is done only in station mode right now.
603 */
604 if (opmode == HAL_M_STA)
605 ahp->ah_procPhyErr |= HAL_RSSI_ANI_ENA;
606 else
607 ahp->ah_procPhyErr &= ~HAL_RSSI_ANI_ENA;
608 /*
609 * Set all ani parameters. We either set them to initial
610 * values or restore the previous ones for the channel.
611 * XXX if ANI follows hardware, we don't care what mode we're
612 * XXX in, we should keep the ani parameters
613 */
614 if (restore && (ichan->privFlags & CHANNEL_ANI_SETUP)) {
615 ar5416AniControl(ah, HAL_ANI_NOISE_IMMUNITY_LEVEL,
616 aniState->noiseImmunityLevel);
617 ar5416AniControl(ah, HAL_ANI_SPUR_IMMUNITY_LEVEL,
618 aniState->spurImmunityLevel);
619 ar5416AniControl(ah, HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION,
620 !aniState->ofdmWeakSigDetectOff);
621 ar5416AniControl(ah, HAL_ANI_CCK_WEAK_SIGNAL_THR,
622 aniState->cckWeakSigThreshold);
623 ar5416AniControl(ah, HAL_ANI_FIRSTEP_LEVEL,
624 aniState->firstepLevel);
625 } else {
626 ar5416AniControl(ah, HAL_ANI_NOISE_IMMUNITY_LEVEL, 0);
627 ar5416AniControl(ah, HAL_ANI_SPUR_IMMUNITY_LEVEL, 0);
628 ar5416AniControl(ah, HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION,
629 AH_FALSE);
630 ar5416AniControl(ah, HAL_ANI_CCK_WEAK_SIGNAL_THR, AH_FALSE);
631 ar5416AniControl(ah, HAL_ANI_FIRSTEP_LEVEL, 0);
632 ichan->privFlags |= CHANNEL_ANI_SETUP;
633 }
634
635 /*
636 * In case the counters haven't yet been setup; set them up.
637 */
638 enableAniMIBCounters(ah, aniState->params);
639 ar5416AniRestart(ah, aniState);
640
641 finish:
642 /* restore RX filter mask */
643 ah->ah_setRxFilter(ah, rxfilter);
644 }
645
646 /*
647 * Process a MIB interrupt. We may potentially be invoked because
648 * any of the MIB counters overflow/trigger so don't assume we're
649 * here because a PHY error counter triggered.
650 */
651 void
ar5416ProcessMibIntr(struct ath_hal * ah,const HAL_NODE_STATS * stats)652 ar5416ProcessMibIntr(struct ath_hal *ah, const HAL_NODE_STATS *stats)
653 {
654 struct ath_hal_5212 *ahp = AH5212(ah);
655 uint32_t phyCnt1, phyCnt2;
656
657 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: mibc 0x%x phyCnt1 0x%x phyCnt2 0x%x "
658 "filtofdm 0x%x filtcck 0x%x\n",
659 __func__, OS_REG_READ(ah, AR_MIBC),
660 OS_REG_READ(ah, AR_PHYCNT1), OS_REG_READ(ah, AR_PHYCNT2),
661 OS_REG_READ(ah, AR_FILTOFDM), OS_REG_READ(ah, AR_FILTCCK));
662
663 /*
664 * First order of business is to clear whatever caused
665 * the interrupt so we don't keep getting interrupted.
666 * We have the usual mib counters that are reset-on-read
667 * and the additional counters that appeared starting in
668 * Hainan. We collect the mib counters and explicitly
669 * zero additional counters we are not using. Anything
670 * else is reset only if it caused the interrupt.
671 */
672 /* NB: these are not reset-on-read */
673 phyCnt1 = OS_REG_READ(ah, AR_PHY_ERR_1);
674 phyCnt2 = OS_REG_READ(ah, AR_PHY_ERR_2);
675 /* not used, always reset them in case they are the cause */
676 OS_REG_WRITE(ah, AR_FILTOFDM, 0);
677 OS_REG_WRITE(ah, AR_FILTCCK, 0);
678 if ((OS_REG_READ(ah, AR_SLP_MIB_CTRL) & AR_SLP_MIB_PENDING) == 0)
679 OS_REG_WRITE(ah, AR_SLP_MIB_CTRL, AR_SLP_MIB_CLEAR);
680
681 /* Clear the mib counters and save them in the stats */
682 ar5212UpdateMibCounters(ah, &ahp->ah_mibStats);
683 ahp->ah_stats.ast_nodestats = *stats;
684
685 /*
686 * Check for an ani stat hitting the trigger threshold.
687 * When this happens we get a MIB interrupt and the top
688 * 2 bits of the counter register will be 0b11, hence
689 * the mask check of phyCnt?.
690 */
691 if (((phyCnt1 & AR_MIBCNT_INTRMASK) == AR_MIBCNT_INTRMASK) ||
692 ((phyCnt2 & AR_MIBCNT_INTRMASK) == AR_MIBCNT_INTRMASK)) {
693 struct ar5212AniState *aniState = ahp->ah_curani;
694 const struct ar5212AniParams *params = aniState->params;
695 uint32_t ofdmPhyErrCnt, cckPhyErrCnt;
696
697 ofdmPhyErrCnt = phyCnt1 - params->ofdmPhyErrBase;
698 ahp->ah_stats.ast_ani_ofdmerrs +=
699 ofdmPhyErrCnt - aniState->ofdmPhyErrCount;
700 aniState->ofdmPhyErrCount = ofdmPhyErrCnt;
701
702 cckPhyErrCnt = phyCnt2 - params->cckPhyErrBase;
703 ahp->ah_stats.ast_ani_cckerrs +=
704 cckPhyErrCnt - aniState->cckPhyErrCount;
705 aniState->cckPhyErrCount = cckPhyErrCnt;
706
707 /*
708 * NB: figure out which counter triggered. If both
709 * trigger we'll only deal with one as the processing
710 * clobbers the error counter so the trigger threshold
711 * check will never be true.
712 */
713 if (aniState->ofdmPhyErrCount > params->ofdmTrigHigh)
714 ar5416AniOfdmErrTrigger(ah);
715 if (aniState->cckPhyErrCount > params->cckTrigHigh)
716 ar5416AniCckErrTrigger(ah);
717 /* NB: always restart to insure the h/w counters are reset */
718 ar5416AniRestart(ah, aniState);
719 }
720 }
721
722 static void
ar5416AniLowerImmunity(struct ath_hal * ah)723 ar5416AniLowerImmunity(struct ath_hal *ah)
724 {
725 struct ath_hal_5212 *ahp = AH5212(ah);
726 struct ar5212AniState *aniState;
727 const struct ar5212AniParams *params;
728
729 HALASSERT(ANI_ENA(ah));
730
731 aniState = ahp->ah_curani;
732 params = aniState->params;
733
734 /*
735 * In the case of AP mode operation, we cannot bucketize beacons
736 * according to RSSI. Instead, lower Firstep level, down to min, and
737 * simply return.
738 */
739 if (AH_PRIVATE(ah)->ah_opmode == HAL_M_HOSTAP) {
740 if (aniState->firstepLevel > 0) {
741 if (ar5416AniControl(ah, HAL_ANI_FIRSTEP_LEVEL,
742 aniState->firstepLevel - 1))
743 return;
744 }
745 }
746 if (ANI_ENA_RSSI(ah)) {
747 int32_t rssi = BEACON_RSSI(ahp);
748 if (rssi > params->rssiThrHigh) {
749 /*
750 * Beacon signal is high, leave ofdm weak signal
751 * detection off or it may oscillate. Let it fall
752 * through.
753 */
754 } else if (rssi > params->rssiThrLow) {
755 /*
756 * Beacon rssi in mid range, turn on ofdm weak signal
757 * detection or lower firstep level.
758 */
759 if (aniState->ofdmWeakSigDetectOff) {
760 if (ar5416AniControl(ah,
761 HAL_ANI_OFDM_WEAK_SIGNAL_DETECTION,
762 AH_TRUE))
763 return;
764 }
765 if (aniState->firstepLevel > 0) {
766 if (ar5416AniControl(ah, HAL_ANI_FIRSTEP_LEVEL,
767 aniState->firstepLevel - 1))
768 return;
769 }
770 } else {
771 /*
772 * Beacon rssi is low, reduce firstep level.
773 */
774 if (aniState->firstepLevel > 0) {
775 if (ar5416AniControl(ah, HAL_ANI_FIRSTEP_LEVEL,
776 aniState->firstepLevel - 1))
777 return;
778 }
779 }
780 }
781 /* then lower spur immunity level, down to zero */
782 if (aniState->spurImmunityLevel > 0) {
783 if (ar5416AniControl(ah, HAL_ANI_SPUR_IMMUNITY_LEVEL,
784 aniState->spurImmunityLevel - 1))
785 return;
786 }
787 /*
788 * if all else fails, lower noise immunity level down to a min value
789 * zero for now
790 */
791 if (aniState->noiseImmunityLevel > 0) {
792 if (ar5416AniControl(ah, HAL_ANI_NOISE_IMMUNITY_LEVEL,
793 aniState->noiseImmunityLevel - 1))
794 return;
795 }
796 }
797
798 #define CLOCK_RATE 44000 /* XXX use mac_usec or similar */
799 /* convert HW counter values to ms using 11g clock rate, goo9d enough
800 for 11a and Turbo */
801
802 /*
803 * Return an approximation of the time spent ``listening'' by
804 * deducting the cycles spent tx'ing and rx'ing from the total
805 * cycle count since our last call. A return value <0 indicates
806 * an invalid/inconsistent time.
807 *
808 * This may be called with ANI disabled; in which case simply keep
809 * the statistics and don't write to the aniState pointer.
810 *
811 * XXX TODO: Make this cleaner!
812 */
813 static int32_t
ar5416AniGetListenTime(struct ath_hal * ah)814 ar5416AniGetListenTime(struct ath_hal *ah)
815 {
816 struct ath_hal_5212 *ahp = AH5212(ah);
817 struct ar5212AniState *aniState = NULL;
818 int32_t listenTime = 0;
819 int good;
820 HAL_SURVEY_SAMPLE hs;
821
822 /*
823 * We shouldn't see ah_curchan be NULL, but just in case..
824 */
825 if (AH_PRIVATE(ah)->ah_curchan == AH_NULL) {
826 ath_hal_printf(ah, "%s: ah_curchan = NULL?\n", __func__);
827 return (0);
828 }
829
830 /*
831 * Fetch the current statistics, squirrel away the current
832 * sample.
833 */
834 OS_MEMZERO(&hs, sizeof(hs));
835 good = ar5416GetMibCycleCounts(ah, &hs);
836 ath_hal_survey_add_sample(ah, &hs);
837
838 if (ANI_ENA(ah))
839 aniState = ahp->ah_curani;
840
841 if (good == AH_FALSE) {
842 /*
843 * Cycle counter wrap (or initial call); it's not possible
844 * to accurately calculate a value because the registers
845 * right shift rather than wrap--so punt and return 0.
846 */
847 listenTime = 0;
848 ahp->ah_stats.ast_ani_lzero++;
849 } else if (ANI_ENA(ah)) {
850 /*
851 * Only calculate and update the cycle count if we have
852 * an ANI state.
853 */
854 int32_t ccdelta =
855 AH5416(ah)->ah_cycleCount - aniState->cycleCount;
856 int32_t rfdelta =
857 AH5416(ah)->ah_rxBusy - aniState->rxFrameCount;
858 int32_t tfdelta =
859 AH5416(ah)->ah_txBusy - aniState->txFrameCount;
860 listenTime = (ccdelta - rfdelta - tfdelta) / CLOCK_RATE;
861 }
862
863 /*
864 * Again, only update ANI state if we have it.
865 */
866 if (ANI_ENA(ah)) {
867 aniState->cycleCount = AH5416(ah)->ah_cycleCount;
868 aniState->rxFrameCount = AH5416(ah)->ah_rxBusy;
869 aniState->txFrameCount = AH5416(ah)->ah_txBusy;
870 }
871
872 return listenTime;
873 }
874
875 /*
876 * Update ani stats in preparation for listen time processing.
877 */
878 static void
updateMIBStats(struct ath_hal * ah,struct ar5212AniState * aniState)879 updateMIBStats(struct ath_hal *ah, struct ar5212AniState *aniState)
880 {
881 struct ath_hal_5212 *ahp = AH5212(ah);
882 const struct ar5212AniParams *params = aniState->params;
883 uint32_t phyCnt1, phyCnt2;
884 int32_t ofdmPhyErrCnt, cckPhyErrCnt;
885
886 /* Clear the mib counters and save them in the stats */
887 ar5212UpdateMibCounters(ah, &ahp->ah_mibStats);
888
889 /* NB: these are not reset-on-read */
890 phyCnt1 = OS_REG_READ(ah, AR_PHY_ERR_1);
891 phyCnt2 = OS_REG_READ(ah, AR_PHY_ERR_2);
892
893 /* NB: these are spec'd to never roll-over */
894 ofdmPhyErrCnt = phyCnt1 - params->ofdmPhyErrBase;
895 if (ofdmPhyErrCnt < 0) {
896 HALDEBUG(ah, HAL_DEBUG_ANI, "OFDM phyErrCnt %d phyCnt1 0x%x\n",
897 ofdmPhyErrCnt, phyCnt1);
898 ofdmPhyErrCnt = AR_PHY_COUNTMAX;
899 }
900 ahp->ah_stats.ast_ani_ofdmerrs +=
901 ofdmPhyErrCnt - aniState->ofdmPhyErrCount;
902 aniState->ofdmPhyErrCount = ofdmPhyErrCnt;
903
904 cckPhyErrCnt = phyCnt2 - params->cckPhyErrBase;
905 if (cckPhyErrCnt < 0) {
906 HALDEBUG(ah, HAL_DEBUG_ANI, "CCK phyErrCnt %d phyCnt2 0x%x\n",
907 cckPhyErrCnt, phyCnt2);
908 cckPhyErrCnt = AR_PHY_COUNTMAX;
909 }
910 ahp->ah_stats.ast_ani_cckerrs +=
911 cckPhyErrCnt - aniState->cckPhyErrCount;
912 aniState->cckPhyErrCount = cckPhyErrCnt;
913 }
914
915 void
ar5416RxMonitor(struct ath_hal * ah,const HAL_NODE_STATS * stats,const struct ieee80211_channel * chan)916 ar5416RxMonitor(struct ath_hal *ah, const HAL_NODE_STATS *stats,
917 const struct ieee80211_channel *chan)
918 {
919 struct ath_hal_5212 *ahp = AH5212(ah);
920 ahp->ah_stats.ast_nodestats.ns_avgbrssi = stats->ns_avgbrssi;
921 }
922
923 /*
924 * Do periodic processing. This routine is called from the
925 * driver's rx interrupt handler after processing frames.
926 */
927 void
ar5416AniPoll(struct ath_hal * ah,const struct ieee80211_channel * chan)928 ar5416AniPoll(struct ath_hal *ah, const struct ieee80211_channel *chan)
929 {
930 struct ath_hal_5212 *ahp = AH5212(ah);
931 struct ar5212AniState *aniState = ahp->ah_curani;
932 const struct ar5212AniParams *params;
933 int32_t listenTime;
934
935 /* Always update from the MIB, for statistics gathering */
936 listenTime = ar5416AniGetListenTime(ah);
937
938 /* XXX can aniState be null? */
939 if (aniState == AH_NULL)
940 return;
941
942 if (!ANI_ENA(ah))
943 return;
944
945 if (listenTime < 0) {
946 ahp->ah_stats.ast_ani_lneg++;
947 /* restart ANI period if listenTime is invalid */
948 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: invalid listenTime\n",
949 __func__);
950 ar5416AniRestart(ah, aniState);
951 }
952 /* XXX beware of overflow? */
953 aniState->listenTime += listenTime;
954
955 OS_MARK(ah, AH_MARK_ANI_POLL, aniState->listenTime);
956
957 params = aniState->params;
958 if (aniState->listenTime > 5*params->period) {
959 /*
960 * Check to see if need to lower immunity if
961 * 5 aniPeriods have passed
962 */
963 updateMIBStats(ah, aniState);
964 if (aniState->ofdmPhyErrCount <= aniState->listenTime *
965 params->ofdmTrigLow/1000 &&
966 aniState->cckPhyErrCount <= aniState->listenTime *
967 params->cckTrigLow/1000)
968 ar5416AniLowerImmunity(ah);
969 HALDEBUG(ah, HAL_DEBUG_ANI, "%s: lower immunity\n",
970 __func__);
971 ar5416AniRestart(ah, aniState);
972 } else if (aniState->listenTime > params->period) {
973 updateMIBStats(ah, aniState);
974 /* check to see if need to raise immunity */
975 if (aniState->ofdmPhyErrCount > aniState->listenTime *
976 params->ofdmTrigHigh / 1000) {
977 HALDEBUG(ah, HAL_DEBUG_ANI,
978 "%s: OFDM err %u listenTime %u\n", __func__,
979 aniState->ofdmPhyErrCount, aniState->listenTime);
980 ar5416AniOfdmErrTrigger(ah);
981 ar5416AniRestart(ah, aniState);
982 } else if (aniState->cckPhyErrCount > aniState->listenTime *
983 params->cckTrigHigh / 1000) {
984 HALDEBUG(ah, HAL_DEBUG_ANI,
985 "%s: CCK err %u listenTime %u\n", __func__,
986 aniState->cckPhyErrCount, aniState->listenTime);
987 ar5416AniCckErrTrigger(ah);
988 ar5416AniRestart(ah, aniState);
989 }
990 }
991 }
992