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avf: fix RSS hash key

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Toeplitz hash key must respect certain properties, it cannot be purely
random. Use the default one from i40e.

Type: fix

Change-Id: Ic8e67a0426de8adfecc1fcdaa99879e13ae38cc9
Signed-off-by: Benoît Ganne <bganne@cisco.com>
This commit is contained in:
Benoît Ganne
2021-09-09 16:27:37 +02:00
committed by Damjan Marion
parent 1a9e2f96d4
commit 895def45c8
1 changed files with 11 additions and 4 deletions
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15
src/plugins/avf/device.c
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@@ -610,18 +610,25 @@ avf_op_config_rss_lut (vlib_main_t * vm, avf_device_t * ad)
clib_error_t *
avf_op_config_rss_key (vlib_main_t * vm, avf_device_t * ad)
{
/* from DPDK i40e... */
static uint32_t rss_key_default[] = { 0x6b793944, 0x23504cb5, 0x5bea75b6,
0x309f4f12, 0x3dc0a2b8, 0x024ddcdf,
0x339b8ca0, 0x4c4af64a, 0x34fac605,
0x55d85839, 0x3a58997d, 0x2ec938e1,
0x66031581 };
int msg_len = sizeof (virtchnl_rss_key_t) + ad->rss_key_size - 1;
int i;
u8 msg[msg_len];
virtchnl_rss_key_t *rk;
if (sizeof (rss_key_default) != ad->rss_key_size)
return clib_error_create ("unsupported RSS key size (expected %d, got %d)",
sizeof (rss_key_default), ad->rss_key_size);
clib_memset (msg, 0, msg_len);
rk = (virtchnl_rss_key_t *) msg;
rk->vsi_id = ad->vsi_id;
rk->key_len = ad->rss_key_size;
u32 seed = random_default_seed ();
for (i = 0; i < ad->rss_key_size; i++)
rk->key[i] = (u8) random_u32 (&seed);
memcpy_s (rk->key, rk->key_len, rss_key_default, sizeof (rss_key_default));
avf_log_debug (ad, "config_rss_key: vsi_id %u rss_key_size %u key 0x%U",
rk->vsi_id, rk->key_len, format_hex_bytes_no_wrap, rk->key,