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Commit e6c948e8 authored by Luis R. Rodriguez's avatar Luis R. Rodriguez Committed by John W. Linville
Browse files

ath9k: Add a few comments about mibevents 



Signed-off-by: default avatarLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 4dfe51e1

drivers/net/wireless/ath9k/hw.c

+16 −2
Original line number Diff line number Diff line
@@ -2526,6 +2526,11 @@ static void ath9k_ani_reset(struct ath_hal *ah) 
	}

}



/*

 * Process a MIB interrupt.  We may potentially be invoked because

 * any of the MIB counters overflow/trigger so don't assume we're

 * here because a PHY error counter triggered.

 */

void ath9k_hw_procmibevent(struct ath_hal *ah,

			   const struct ath9k_node_stats *stats)

{
@@ -2533,18 +2538,20 @@ void ath9k_hw_procmibevent(struct ath_hal *ah, 
	u32 phyCnt1, phyCnt2;



	DPRINTF(ah->ah_sc, ATH_DBG_ANI, "Processing Mib Intr\n");



	/* Reset these counters regardless */

	REG_WRITE(ah, AR_FILT_OFDM, 0);

	REG_WRITE(ah, AR_FILT_CCK, 0);

	if (!(REG_READ(ah, AR_SLP_MIB_CTRL) & AR_SLP_MIB_PENDING))

		REG_WRITE(ah, AR_SLP_MIB_CTRL, AR_SLP_MIB_CLEAR);



	/* Clear the mib counters and save them in the stats */

	ath9k_hw_update_mibstats(ah, &ahp->ah_mibStats);

	ahp->ah_stats.ast_nodestats = *stats;



	if (!DO_ANI(ah))

		return;



	/* NB: these are not reset-on-read */

	phyCnt1 = REG_READ(ah, AR_PHY_ERR_1);

	phyCnt2 = REG_READ(ah, AR_PHY_ERR_2);

	if (((phyCnt1 & AR_MIBCNT_INTRMASK) == AR_MIBCNT_INTRMASK) ||
@@ -2552,6 +2559,7 @@ void ath9k_hw_procmibevent(struct ath_hal *ah, 
		struct ar5416AniState *aniState = ahp->ah_curani;

		u32 ofdmPhyErrCnt, cckPhyErrCnt;



		/* NB: only use ast_ani_*errs with AH_PRIVATE_DIAG */

		ofdmPhyErrCnt = phyCnt1 - aniState->ofdmPhyErrBase;

		ahp->ah_stats.ast_ani_ofdmerrs +=

			ofdmPhyErrCnt - aniState->ofdmPhyErrCount;
@@ -2562,11 +2570,17 @@ void ath9k_hw_procmibevent(struct ath_hal *ah, 
			cckPhyErrCnt - aniState->cckPhyErrCount;

		aniState->cckPhyErrCount = cckPhyErrCnt;



		/*

		 * NB: figure out which counter triggered.  If both

		 * trigger we'll only deal with one as the processing

		 * clobbers the error counter so the trigger threshold

		 * check will never be true.

		 */

		if (aniState->ofdmPhyErrCount > aniState->ofdmTrigHigh)

			ath9k_hw_ani_ofdm_err_trigger(ah);

		if (aniState->cckPhyErrCount > aniState->cckTrigHigh)

			ath9k_hw_ani_cck_err_trigger(ah);



		/* NB: always restart to insure the h/w counters are reset */

		ath9k_ani_restart(ah);

	}

}