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ath9k_hw: move the cycle counter tracking to ath

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Instead of keeping track of wraparound, clear the counters on every
access and keep separate deltas for ANI and later survey use.
Also moves the function for calculating the 'listen time' for ANI

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau
2010-10-08 22:13:53 +02:00
committed by John W. Linville
parent 9d119f3ebd
commit b5bfc5683d
9 changed files with 101 additions and 87 deletions
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59
drivers/net/wireless/ath/hw.c
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@@ -124,3 +124,62 @@ void ath_hw_setbssidmask(struct ath_common *common)
REG_WRITE(ah, get_unaligned_le16(common->bssidmask + 4), AR_BSSMSKU);
}
EXPORT_SYMBOL(ath_hw_setbssidmask);
/**
* ath_hw_cycle_counters_update - common function to update cycle counters
*
* @common: the ath_common struct for the device.
*
* This function is used to update all cycle counters in one place.
* It has to be called while holding common->cc_lock!
*/
void ath_hw_cycle_counters_update(struct ath_common *common)
{
u32 cycles, busy, rx, tx;
void *ah = common->ah;
/* freeze */
REG_WRITE(ah, AR_MIBC_FMC, AR_MIBC);
/* read */
cycles = REG_READ(ah, AR_CCCNT);
busy = REG_READ(ah, AR_RCCNT);
rx = REG_READ(ah, AR_RFCNT);
tx = REG_READ(ah, AR_TFCNT);
/* clear */
REG_WRITE(ah, 0, AR_CCCNT);
REG_WRITE(ah, 0, AR_RFCNT);
REG_WRITE(ah, 0, AR_RCCNT);
REG_WRITE(ah, 0, AR_TFCNT);
/* unfreeze */
REG_WRITE(ah, 0, AR_MIBC);
/* update all cycle counters here */
common->cc_ani.cycles += cycles;
common->cc_ani.rx_busy += busy;
common->cc_ani.rx_frame += rx;
common->cc_ani.tx_frame += tx;
common->cc_survey.cycles += cycles;
common->cc_survey.rx_busy += busy;
common->cc_survey.rx_frame += rx;
common->cc_survey.tx_frame += tx;
}
EXPORT_SYMBOL(ath_hw_cycle_counters_update);
int32_t ath_hw_get_listen_time(struct ath_common *common)
{
struct ath_cycle_counters *cc = &common->cc_ani;
int32_t listen_time;
listen_time = (cc->cycles - cc->rx_frame - cc->tx_frame) /
(common->clockrate * 1000);
memset(cc, 0, sizeof(*cc));
return listen_time;
}
EXPORT_SYMBOL(ath_hw_get_listen_time);