From d8026d939495c105cf747c0196a8fa738cf2ad20 Mon Sep 17 00:00:00 2001 From: Michael Chan Date: Wed, 12 Nov 2008 16:02:20 -0800 Subject: bnx2: Set rx buffer water marks based on MTU. The default rx buffer water marks for XOFF/XON are for 1500 MTU. At larger MTUs, these water marks need to be adjusted for effective flow control. Signed-off-by: Michael Chan Signed-off-by: Matt Carlson Signed-off-by: Benjamin Li Signed-off-by: David S. Miller --- drivers/net/bnx2.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers/net/bnx2.h') diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h index 617d9534016..2b9649ae630 100644 --- a/drivers/net/bnx2.h +++ b/drivers/net/bnx2.h @@ -4199,7 +4199,14 @@ struct l2_fhdr { #define BNX2_RBUF_CONFIG 0x0020000c #define BNX2_RBUF_CONFIG_XOFF_TRIP (0x3ffL<<0) +#define BNX2_RBUF_CONFIG_XOFF_TRIP_VAL(mtu) \ + ((((mtu) - 1500) * 31 / 1000) + 54) #define BNX2_RBUF_CONFIG_XON_TRIP (0x3ffL<<16) +#define BNX2_RBUF_CONFIG_XON_TRIP_VAL(mtu) \ + ((((mtu) - 1500) * 39 / 1000) + 66) +#define BNX2_RBUF_CONFIG_VAL(mtu) \ + (BNX2_RBUF_CONFIG_XOFF_TRIP_VAL(mtu) | \ + (BNX2_RBUF_CONFIG_XON_TRIP_VAL(mtu) << 16)) #define BNX2_RBUF_FW_BUF_ALLOC 0x00200010 #define BNX2_RBUF_FW_BUF_ALLOC_VALUE (0x1ffL<<7) @@ -4221,11 +4228,25 @@ struct l2_fhdr { #define BNX2_RBUF_CONFIG2 0x0020001c #define BNX2_RBUF_CONFIG2_MAC_DROP_TRIP (0x3ffL<<0) +#define BNX2_RBUF_CONFIG2_MAC_DROP_TRIP_VAL(mtu) \ + ((((mtu) - 1500) * 4 / 1000) + 5) #define BNX2_RBUF_CONFIG2_MAC_KEEP_TRIP (0x3ffL<<16) +#define BNX2_RBUF_CONFIG2_MAC_KEEP_TRIP_VAL(mtu) \ + ((((mtu) - 1500) * 2 / 100) + 30) +#define BNX2_RBUF_CONFIG2_VAL(mtu) \ + (BNX2_RBUF_CONFIG2_MAC_DROP_TRIP_VAL(mtu) | \ + (BNX2_RBUF_CONFIG2_MAC_KEEP_TRIP_VAL(mtu) << 16)) #define BNX2_RBUF_CONFIG3 0x00200020 #define BNX2_RBUF_CONFIG3_CU_DROP_TRIP (0x3ffL<<0) +#define BNX2_RBUF_CONFIG3_CU_DROP_TRIP_VAL(mtu) \ + ((((mtu) - 1500) * 12 / 1000) + 18) #define BNX2_RBUF_CONFIG3_CU_KEEP_TRIP (0x3ffL<<16) +#define BNX2_RBUF_CONFIG3_CU_KEEP_TRIP_VAL(mtu) \ + ((((mtu) - 1500) * 2 / 100) + 30) +#define BNX2_RBUF_CONFIG3_VAL(mtu) \ + (BNX2_RBUF_CONFIG3_CU_DROP_TRIP_VAL(mtu) | \ + (BNX2_RBUF_CONFIG3_CU_KEEP_TRIP_VAL(mtu) << 16)) #define BNX2_RBUF_PKT_DATA 0x00208000 #define BNX2_RBUF_CLIST_DATA 0x00210000 -- cgit v1.2.3