diff mbox

[net-next,5/8] tg3: Fix RSS indirection table distribution

Message ID 1311193257-20531-6-git-send-email-mcarlson@broadcom.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Matt Carlson July 20, 2011, 8:20 p.m. UTC 
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 <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
---
 drivers/net/tg3.c |   21 +++++++++++++++------
 1 files changed, 15 insertions(+), 6 deletions(-)
diff mbox

Patch

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 5110ea0..e5c1bc9 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;
 			}