diff options
| author | stephen hemminger <shemminger@vyatta.com> | 2011-11-16 17:42:59 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-17 05:27:28 +0400 |
| commit | 00427a7387a1c91ddb6b69e50916173d8aca66e0 (patch) | |
| tree | 5c2ec354d78667b4f781c774699baba5701e7b7a /drivers/net | |
| parent | b1cb82566242fbb54d5c655e23995a8f7bd37ecf (diff) | |
| download | linux-00427a7387a1c91ddb6b69e50916173d8aca66e0.tar.xz | |
sky2: used fixed RSS key
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/marvell/sky2.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c index 3777fb348b86..48c9e1281c7e 100644 --- a/drivers/net/ethernet/marvell/sky2.c +++ b/drivers/net/ethernet/marvell/sky2.c @@ -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), |