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eth: fbnic: let user control the RSS hash fields

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Support setting the fields over which RSS computes its hash.

Signed-off-by: Alexander Duyck <alexanderduyck@fb.com>
Link: https://patch.msgid.link/20241220025241.1522781-6-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alexander Duyck 2024-12-19 18:52:36 -08:00 committed by Jakub Kicinski
parent 31ab733e99
commit c23a1461bf
1 changed files with 50 additions and 0 deletions
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50
drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c
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@ -167,6 +167,55 @@ static int fbnic_get_rxnfc(struct net_device *netdev,
return ret;
}
#define FBNIC_L2_HASH_OPTIONS \
(RXH_L2DA | RXH_DISCARD)
#define FBNIC_L3_HASH_OPTIONS \
(FBNIC_L2_HASH_OPTIONS | RXH_IP_SRC | RXH_IP_DST)
#define FBNIC_L4_HASH_OPTIONS \
(FBNIC_L3_HASH_OPTIONS | RXH_L4_B_0_1 | RXH_L4_B_2_3)
static int
fbnic_set_rss_hash_opts(struct fbnic_net *fbn, const struct ethtool_rxnfc *cmd)
{
int hash_opt_idx;
/* Verify the type requested is correct */
hash_opt_idx = fbnic_get_rss_hash_idx(cmd->flow_type);
if (hash_opt_idx < 0)
return -EINVAL;
/* Verify the fields asked for can actually be assigned based on type */
if (cmd->data & ~FBNIC_L4_HASH_OPTIONS ||
(hash_opt_idx > FBNIC_L4_HASH_OPT &&
cmd->data & ~FBNIC_L3_HASH_OPTIONS) ||
(hash_opt_idx > FBNIC_IP_HASH_OPT &&
cmd->data & ~FBNIC_L2_HASH_OPTIONS))
return -EINVAL;
fbn->rss_flow_hash[hash_opt_idx] = cmd->data;
if (netif_running(fbn->netdev)) {
fbnic_rss_reinit(fbn->fbd, fbn);
fbnic_write_rules(fbn->fbd);
}
return 0;
}
static int fbnic_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
{
struct fbnic_net *fbn = netdev_priv(netdev);
int ret = -EOPNOTSUPP;
switch (cmd->cmd) {
case ETHTOOL_SRXFH:
ret = fbnic_set_rss_hash_opts(fbn, cmd);
break;
}
return ret;
}
static u32 fbnic_get_rxfh_key_size(struct net_device *netdev)
{
return FBNIC_RPC_RSS_KEY_BYTE_LEN;
@ -363,6 +412,7 @@ static const struct ethtool_ops fbnic_ethtool_ops = {
.get_ethtool_stats = fbnic_get_ethtool_stats,
.get_sset_count = fbnic_get_sset_count,
.get_rxnfc = fbnic_get_rxnfc,
.set_rxnfc = fbnic_set_rxnfc,
.get_rxfh_key_size = fbnic_get_rxfh_key_size,
.get_rxfh_indir_size = fbnic_get_rxfh_indir_size,
.get_rxfh = fbnic_get_rxfh,