[PATCH net-next 2/5] eth: ice: drop the dead code related to rss_contexts

[Jakub Kicinski <kuba@kernel.org>]

ICE appears to have some odd form of rss_context use plumbed
in for .get_rxfh. The .set_rxfh side does not support creating
contexts, however, so this must be dead code. For at least a year
now (since commit 7964e7884643 ("net: ethtool: use the tracking
array for get_rxfh on custom RSS contexts")) we have not been
calling .get_rxfh with a non-zero rss_context. We just get
the info from the RSS XArray under dev->ethtool.

Remove what must be dead code in the driver, clear the support flags.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 drivers/net/ethernet/intel/ice/ice_ethtool.c | 28 +++-----------------
 1 file changed, 3 insertions(+), 25 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index ea7e8b879b48..e54221fba849 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -3591,11 +3591,10 @@ static int
 ice_get_rxfh(struct net_device *netdev, struct ethtool_rxfh_param *rxfh)
 {
 	struct ice_netdev_priv *np = netdev_priv(netdev);
-	u32 rss_context = rxfh->rss_context;
 	struct ice_vsi *vsi = np->vsi;
 	struct ice_pf *pf = vsi->back;
 	u16 qcount, offset;
-	int err, num_tc, i;
+	int err, i;
 	u8 *lut;
 
 	if (!test_bit(ICE_FLAG_RSS_ENA, pf->flags)) {
@@ -3603,24 +3602,8 @@ ice_get_rxfh(struct net_device *netdev, struct ethtool_rxfh_param *rxfh)
 		return -EOPNOTSUPP;
 	}
 
-	if (rss_context && !ice_is_adq_active(pf)) {
-		netdev_err(netdev, "RSS context cannot be non-zero when ADQ is not configured.\n");
-		return -EINVAL;
-	}
-
-	qcount = vsi->mqprio_qopt.qopt.count[rss_context];
-	offset = vsi->mqprio_qopt.qopt.offset[rss_context];
-
-	if (rss_context && ice_is_adq_active(pf)) {
-		num_tc = vsi->mqprio_qopt.qopt.num_tc;
-		if (rss_context >= num_tc) {
-			netdev_err(netdev, "RSS context:%d  > num_tc:%d\n",
-				   rss_context, num_tc);
-			return -EINVAL;
-		}
-		/* Use channel VSI of given TC */
-		vsi = vsi->tc_map_vsi[rss_context];
-	}
+	qcount = vsi->mqprio_qopt.qopt.count[0];
+	offset = vsi->mqprio_qopt.qopt.offset[0];
 
 	rxfh->hfunc = ETH_RSS_HASH_TOP;
 	if (vsi->rss_hfunc == ICE_AQ_VSI_Q_OPT_RSS_HASH_SYM_TPLZ)
@@ -3680,9 +3663,6 @@ ice_set_rxfh(struct net_device *netdev, struct ethtool_rxfh_param *rxfh,
 	    rxfh->hfunc != ETH_RSS_HASH_TOP)
 		return -EOPNOTSUPP;
 
-	if (rxfh->rss_context)
-		return -EOPNOTSUPP;
-
 	if (!test_bit(ICE_FLAG_RSS_ENA, pf->flags)) {
 		/* RSS not supported return error here */
 		netdev_warn(netdev, "RSS is not configured on this VSI!\n");
@@ -4750,12 +4730,10 @@ static int ice_repr_ethtool_reset(struct net_device *dev, u32 *flags)
 }
 
 static const struct ethtool_ops ice_ethtool_ops = {
-	.cap_rss_ctx_supported  = true,
 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
 				     ETHTOOL_COALESCE_USE_ADAPTIVE |
 				     ETHTOOL_COALESCE_RX_USECS_HIGH,
 	.supported_input_xfrm	= RXH_XFRM_SYM_XOR,
-	.rxfh_per_ctx_key	= true,
 	.get_link_ksettings	= ice_get_link_ksettings,
 	.set_link_ksettings	= ice_set_link_ksettings,
 	.get_fec_stats		= ice_get_fec_stats,
-- 
2.50.0