From a58a621a65e7ae6519c3aaaff0a91f95877d4a98 Mon Sep 17 00:00:00 2001 From: Pyun YongHyeon Date: Mon, 29 Nov 2010 01:34:43 +0000 Subject: MFC r215847: Disable retrying RX descriptor loading. The counter is used to set number of retry to be performed whenever controller found RX descriptor was empty. RX empty interrupt is generated only when the retry counter is over. Experimentation shows retrying RX descriptor loading increased number of dropped frames under flow-control enabled environments so disable it and have controller generate RX empty interrupt as fast as it can. While I'm here fix RXCSR_DESC_RT_CNT macro. --- sys/dev/jme/if_jmereg.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'sys/dev') diff --git a/sys/dev/jme/if_jmereg.h b/sys/dev/jme/if_jmereg.h index 482c65f2a0b8..c6870987a4c5 100644 --- a/sys/dev/jme/if_jmereg.h +++ b/sys/dev/jme/if_jmereg.h @@ -275,8 +275,8 @@ #define RXCSR_RXQ2 2 #define RXCSR_RXQ3 3 #define RXCSR_DESC_RT_CNT(x) \ - ((((x) / 4) << RXCSR_DESC_RT_CNT_SHIFT) & RXCSR_DESC_RT_CNT_MASK) -#define RXCSR_DESC_RT_CNT_DEFAULT 32 + (((x) << RXCSR_DESC_RT_CNT_SHIFT) & RXCSR_DESC_RT_CNT_MASK) +#define RXCSR_DESC_RT_CNT_DEFAULT 0 /* Rx queue descriptor base address. 16bytes alignment needed. */ #define JME_RXDBA_LO 0x0024 -- cgit v1.3