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eth: fbnic: support an additional RSS context

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Add support for an extra RSS context. The device has a primary
and a secondary context.

Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
Reviewed-by: Joe Damato <jdamato@fastly.com>
Link: https://patch.msgid.link/20250206235334.1425329-4-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Daniel Zahka 2025-02-06 15:53:30 -08:00 committed by Jakub Kicinski
parent 23bac39910
commit 260676ebb1
1 changed files with 59 additions and 0 deletions
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59
drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c
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@ -374,6 +374,61 @@ fbnic_set_rxfh(struct net_device *netdev, struct ethtool_rxfh_param *rxfh,
return 0;
}
static int
fbnic_modify_rxfh_context(struct net_device *netdev,
struct ethtool_rxfh_context *ctx,
const struct ethtool_rxfh_param *rxfh,
struct netlink_ext_ack *extack)
{
struct fbnic_net *fbn = netdev_priv(netdev);
const u32 *indir = rxfh->indir;
unsigned int changes;
if (!indir)
indir = ethtool_rxfh_context_indir(ctx);
changes = fbnic_set_indir(fbn, rxfh->rss_context, indir);
if (changes && netif_running(netdev))
fbnic_rss_reinit_hw(fbn->fbd, fbn);
return 0;
}
static int
fbnic_create_rxfh_context(struct net_device *netdev,
struct ethtool_rxfh_context *ctx,
const struct ethtool_rxfh_param *rxfh,
struct netlink_ext_ack *extack)
{
struct fbnic_net *fbn = netdev_priv(netdev);
if (rxfh->hfunc && rxfh->hfunc != ETH_RSS_HASH_TOP) {
NL_SET_ERR_MSG_MOD(extack, "RSS hash function not supported");
return -EOPNOTSUPP;
}
ctx->hfunc = ETH_RSS_HASH_TOP;
if (!rxfh->indir) {
u32 *indir = ethtool_rxfh_context_indir(ctx);
unsigned int num_rx = fbn->num_rx_queues;
unsigned int i;
for (i = 0; i < FBNIC_RPC_RSS_TBL_SIZE; i++)
indir[i] = ethtool_rxfh_indir_default(i, num_rx);
}
return fbnic_modify_rxfh_context(netdev, ctx, rxfh, extack);
}
static int
fbnic_remove_rxfh_context(struct net_device *netdev,
struct ethtool_rxfh_context *ctx, u32 rss_context,
struct netlink_ext_ack *extack)
{
/* Nothing to do, contexts are allocated statically */
return 0;
}
static void fbnic_get_channels(struct net_device *netdev,
struct ethtool_channels *ch)
{
@ -586,6 +641,7 @@ fbnic_get_eth_mac_stats(struct net_device *netdev,
}
static const struct ethtool_ops fbnic_ethtool_ops = {
.rxfh_max_num_contexts = FBNIC_RPC_RSS_TBL_COUNT,
.get_drvinfo = fbnic_get_drvinfo,
.get_regs_len = fbnic_get_regs_len,
.get_regs = fbnic_get_regs,
@ -598,6 +654,9 @@ static const struct ethtool_ops fbnic_ethtool_ops = {
.get_rxfh_indir_size = fbnic_get_rxfh_indir_size,
.get_rxfh = fbnic_get_rxfh,
.set_rxfh = fbnic_set_rxfh,
.create_rxfh_context = fbnic_create_rxfh_context,
.modify_rxfh_context = fbnic_modify_rxfh_context,
.remove_rxfh_context = fbnic_remove_rxfh_context,
.get_channels = fbnic_get_channels,
.set_channels = fbnic_set_channels,
.get_ts_info = fbnic_get_ts_info,