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sky2: used fixed RSS key

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Rather than generating a different RSS key on each boot, just use
a predetermined value that will map same flow to same value on
every device.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
stephen hemminger 2011-11-16 13:42:59 +00:00 committed by David S. Miller
parent b1cb825662
commit 00427a7387
1 changed files with 9 additions and 4 deletions
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13
drivers/net/ethernet/marvell/sky2.c
View file

@ -1275,6 +1275,14 @@ static void rx_set_checksum(struct sky2_port *sky2)
? BMU_ENA_RX_CHKSUM : BMU_DIS_RX_CHKSUM);
}
/*
* Fixed initial key as seed to RSS.
*/
static const uint32_t rss_init_key[10] = {
0x7c3351da, 0x51c5cf4e, 0x44adbdd1, 0xe8d38d18, 0x48897c43,
0xb1d60e7e, 0x6a3dd760, 0x01a2e453, 0x16f46f13, 0x1a0e7b30
};
/* Enable/disable receive hash calculation (RSS) */
static void rx_set_rss(struct net_device *dev, u32 features)
{
@ -1290,12 +1298,9 @@ static void rx_set_rss(struct net_device *dev, u32 features)
/* Program RSS initial values */
if (features & NETIF_F_RXHASH) {
u32 key[nkeys];
get_random_bytes(key, nkeys * sizeof(u32));
for (i = 0; i < nkeys; i++)
sky2_write32(hw, SK_REG(sky2->port, RSS_KEY + i * 4),
key[i]);
rss_init_key[i]);
/* Need to turn on (undocumented) flag to make hashing work */
sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T),