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ionic: support ethtool rxhash disable

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We can disable rxhashing by setting rss_types to 0.  The user
can toggle this with "ethtool -K <ethX> rxhash off|on",
which calls into the .ndo_set_features callback with the
NETIF_F_RXHASH feature bit set or cleared.  This patch adds
a check for that bit and updates the FW if necessary.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2020-03-06 17:04:05 -08:00 committed by David S. Miller
parent c6d3d73a40
commit 75fcb75b93
1 changed files with 9 additions and 2 deletions

11
drivers/net/ethernet/pensando/ionic/ionic_lif.c

@ -1094,6 +1094,7 @@ static int ionic_set_nic_features(struct ionic_lif *lif,
u64 vlan_flags = IONIC_ETH_HW_VLAN_TX_TAG |
IONIC_ETH_HW_VLAN_RX_STRIP |
IONIC_ETH_HW_VLAN_RX_FILTER;
u64 old_hw_features;
int err;
ctx.cmd.lif_setattr.features = ionic_netdev_features_to_nic(features);
@ -1101,9 +1102,13 @@ static int ionic_set_nic_features(struct ionic_lif *lif,
if (err)
return err;
old_hw_features = lif->hw_features;
lif->hw_features = le64_to_cpu(ctx.cmd.lif_setattr.features &
ctx.comp.lif_setattr.features);
if ((old_hw_features ^ lif->hw_features) & IONIC_ETH_HW_RX_HASH)
ionic_lif_rss_config(lif, lif->rss_types, NULL, NULL);
if ((vlan_flags & features) &&
!(vlan_flags & le64_to_cpu(ctx.comp.lif_setattr.features)))
dev_info_once(lif->ionic->dev, "NIC is not supporting vlan offload, likely in SmartNIC mode\n");
@ -1357,13 +1362,15 @@ int ionic_lif_rss_config(struct ionic_lif *lif, const u16 types,
.cmd.lif_setattr = {
.opcode = IONIC_CMD_LIF_SETATTR,
.attr = IONIC_LIF_ATTR_RSS,
.rss.types = cpu_to_le16(types),
.rss.addr = cpu_to_le64(lif->rss_ind_tbl_pa),
},
};
unsigned int i, tbl_sz;
lif->rss_types = types;
if (lif->hw_features & IONIC_ETH_HW_RX_HASH) {
lif->rss_types = types;
ctx.cmd.lif_setattr.rss.types = cpu_to_le16(types);
}
if (key)
memcpy(lif->rss_hash_key, key, IONIC_RSS_HASH_KEY_SIZE);