From 9d53fa129628d4899083b06fa66b7ca10fed8eb4 Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Wed, 20 Jul 2011 10:20:54 +0000 Subject: [PATCH] tg3: Fix RSS indirection table distribution The current RSS indirection table is populated such that more traffic will hit the first RSS ring. This patch adjusts the indirection table so that the load is more evenly distributed. Signed-off-by: Matt Carlson Reviewed-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/tg3.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 5110ea0be910..e5c1bc919b4d 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -8723,15 +8723,24 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy) udelay(100); if (tg3_flag(tp, ENABLE_RSS)) { + int i = 0; u32 reg = MAC_RSS_INDIR_TBL_0; - u8 *ent = (u8 *)&val; - /* Setup the indirection table */ - for (i = 0; i < TG3_RSS_INDIR_TBL_SIZE; i++) { - int idx = i % sizeof(val); + if (tp->irq_cnt == 2) { + for (i = 0; i < TG3_RSS_INDIR_TBL_SIZE; i += 8) { + tw32(reg, 0x0); + reg += 4; + } + } else { + u32 val; - ent[idx] = i % (tp->irq_cnt - 1); - if (idx == sizeof(val) - 1) { + while (i < TG3_RSS_INDIR_TBL_SIZE) { + val = i % (tp->irq_cnt - 1); + i++; + for (; i % 8; i++) { + val <<= 4; + val |= (i % (tp->irq_cnt - 1)); + } tw32(reg, val); reg += 4; }