Author: adrian
Date: Wed Feb 20 12:14:49 2013
New Revision: 247033
URL: http://svnweb.freebsd.org/changeset/base/247033
Log:
Configure larger TX FIFO default and maximum level values.
This has reduced the number of TX delimiter and data underruns when
doing large UDP transfers (>100mbit).
This stops any HAL_INT_TXURN interrupts from occuring, which is a good
sign!
Obtained from: Qualcomm Atheros
Modified:
head/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c
Modified: head/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c
==============================================================================
--- head/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c Wed Feb 20 12:06:33
2013 (r247032)
+++ head/sys/dev/ath/ath_hal/ar5416/ar5416_attach.c Wed Feb 20 12:14:49
2013 (r247033)
@@ -241,8 +241,24 @@ ar5416InitState(struct ath_hal_5416 *ahp
/* Enable all ANI functions to begin with */
AH5416(ah)->ah_ani_function = 0xffffffff;
- /* Set overridable ANI methods */
- AH5212(ah)->ah_aniControl = ar5416AniControl;
+ /* Set overridable ANI methods */
+ AH5212(ah)->ah_aniControl = ar5416AniControl;
+
+ /* Default FIFO Trigger levels */
+#define AR_FTRIG_512B 0x00000080 // 5 bits total
+ /* AR9285/AR9271 need to use half the TX FIFOs */
+ if (AR_SREV_KITE(ah) || AR_SREV_9271(ah)) {
+ AH5212(ah)->ah_txTrigLev = (AR_FTRIG_256B >> AR_FTRIG_S);
+ AH5212(ah)->ah_maxTxTrigLev = ((2048 / 64) - 1);
+ } else {
+ AH5212(ah)->ah_txTrigLev = (AR_FTRIG_512B >> AR_FTRIG_S);
+ AH5212(ah)->ah_maxTxTrigLev = ((4096 / 64) - 1);
+ }
+ ath_hal_printf(ah, "%s: trigLev=%d, maxTxTrigLev=%d\n",
+ __func__,
+ AH5212(ah)->ah_txTrigLev,
+ AH5212(ah)->ah_maxTxTrigLev);
+#undef AR_FTRIG_512B
}
uint32_t
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