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.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'drivers/net/bnx2.c') diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c index d28cbce0ec4..a52ffdc3b40 100644 --- a/drivers/net/bnx2.c +++ b/drivers/net/bnx2.c @@ -4473,7 +4473,7 @@ bnx2_reset_chip(struct bnx2 *bp, u32 reset_code) static int bnx2_init_chip(struct bnx2 *bp) { - u32 val; + u32 val, mtu; int rc, i; /* Make sure the interrupt is not active. */ @@ -4565,11 +4565,19 @@ bnx2_init_chip(struct bnx2 *bp) REG_WR(bp, BNX2_EMAC_BACKOFF_SEED, val); /* Program the MTU. Also include 4 bytes for CRC32. */ - val = bp->dev->mtu + ETH_HLEN + 4; + mtu = bp->dev->mtu; + val = mtu + ETH_HLEN + ETH_FCS_LEN; if (val > (MAX_ETHERNET_PACKET_SIZE + 4)) val |= BNX2_EMAC_RX_MTU_SIZE_JUMBO_ENA; REG_WR(bp, BNX2_EMAC_RX_MTU_SIZE, val); + if (mtu < 1500) + mtu = 1500; + + bnx2_reg_wr_ind(bp, BNX2_RBUF_CONFIG, BNX2_RBUF_CONFIG_VAL(mtu)); + bnx2_reg_wr_ind(bp, BNX2_RBUF_CONFIG2, BNX2_RBUF_CONFIG2_VAL(mtu)); + bnx2_reg_wr_ind(bp, BNX2_RBUF_CONFIG3, BNX2_RBUF_CONFIG3_VAL(mtu)); + for (i = 0; i < BNX2_MAX_MSIX_VEC; i++) bp->bnx2_napi[i].last_status_idx = 0; -- cgit v1.2.3