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Add a new HAL capability - check and enforce whether the NIC supports

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enforcing the TXOP and TBTT limits:

* Frames which will overlap with TBTT will not TX;
* Frames which will exceed TXOP will be filtered.

This is not enabled by default; it's intended to be enabled by the
TDMA code on 802.11n capable chipsets.
This commit is contained in:
Adrian Chadd 2012-12-01 03:48:11 +00:00
parent 39aa926bb3
commit e5d63a99bc
2 changed files with 18 additions and 0 deletions
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1
sys/dev/ath/ath_hal/ah.h
View file

@ -192,6 +192,7 @@ typedef enum {
HAL_CAP_LONG_RXDESC_TSF = 243, /* hardware supports 32bit TSF in RX descriptor */
HAL_CAP_BB_READ_WAR = 244, /* baseband read WAR */
HAL_CAP_SERIALISE_WAR = 245, /* serialise register access on PCI */
HAL_CAP_ENFORCE_TXOP = 246, /* Enforce TXOP if supported */
} HAL_CAPABILITY_TYPE;
/*

17
sys/dev/ath/ath_hal/ar5416/ar5416_misc.c
View file

@ -451,6 +451,10 @@ ar5416GetCapability(struct ath_hal *ah, HAL_CAPABILITY_TYPE type,
HAL_OK : HAL_ENOTSUPP;
case HAL_CAP_DIVERSITY: /* disable classic fast diversity */
return HAL_ENXIO;
case HAL_CAP_ENFORCE_TXOP:
(*result) =
!! (AH5212(ah)->ah_miscMode & AR_PCU_TXOP_TBTT_LIMIT_ENA);
return (HAL_OK);
default:
break;
}
@ -480,6 +484,19 @@ ar5416SetCapability(struct ath_hal *ah, HAL_CAPABILITY_TYPE type,
else
pCap->halTxStreams = 1;
return AH_TRUE;
case HAL_CAP_ENFORCE_TXOP:
if (setting) {
AH5212(ah)->ah_miscMode
|= AR_PCU_TXOP_TBTT_LIMIT_ENA;
OS_REG_SET_BIT(ah, AR_MISC_MODE,
AR_PCU_TXOP_TBTT_LIMIT_ENA);
} else {
AH5212(ah)->ah_miscMode
&= ~AR_PCU_TXOP_TBTT_LIMIT_ENA;
OS_REG_CLR_BIT(ah, AR_MISC_MODE,
AR_PCU_TXOP_TBTT_LIMIT_ENA);
}
return AH_TRUE;
default:
break;
}