netdev - [PATCH net-next v1 2/2] ice: remove GRO drop accounting

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Message-Id: <20210106215539.2103688-3-jesse.brandeburg@intel.com>
Date:   Wed,  6 Jan 2021 13:55:39 -0800
From:   Jesse Brandeburg <jesse.brandeburg@...el.com>
To:     netdev@...r.kernel.org
Cc:     Jesse Brandeburg <jesse.brandeburg@...el.com>,
        intel-wired-lan@...ts.osuosl.org
Subject: [PATCH net-next v1 2/2] ice: remove GRO drop accounting

The driver was counting GRO drops but now that the stack
does it with the previous patch, the driver can drop
all the logic.  The driver keeps the dev_dbg message in order
to do optional detailed tracing.

This mostly undoes commit a8fffd7ae9a5 ("ice: add useful statistics").

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
---
 drivers/net/ethernet/intel/ice/ice.h          | 1 -
 drivers/net/ethernet/intel/ice/ice_ethtool.c  | 1 -
 drivers/net/ethernet/intel/ice/ice_main.c     | 4 +---
 drivers/net/ethernet/intel/ice/ice_txrx.h     | 1 -
 drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 2 --
 5 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index 56725356a17b..dde850045e7e 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -256,7 +256,6 @@ struct ice_vsi {
 	u32 tx_busy;
 	u32 rx_buf_failed;
 	u32 rx_page_failed;
-	u32 rx_gro_dropped;
 	u16 num_q_vectors;
 	u16 base_vector;		/* IRQ base for OS reserved vectors */
 	enum ice_vsi_type type;
diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index 9e8e9531cd87..025c0a13e724 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -59,7 +59,6 @@ static const struct ice_stats ice_gstrings_vsi_stats[] = {
 	ICE_VSI_STAT("rx_unknown_protocol", eth_stats.rx_unknown_protocol),
 	ICE_VSI_STAT("rx_alloc_fail", rx_buf_failed),
 	ICE_VSI_STAT("rx_pg_alloc_fail", rx_page_failed),
-	ICE_VSI_STAT("rx_gro_dropped", rx_gro_dropped),
 	ICE_VSI_STAT("tx_errors", eth_stats.tx_errors),
 	ICE_VSI_STAT("tx_linearize", tx_linearize),
 	ICE_VSI_STAT("tx_busy", tx_busy),
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index c52b9bb0e3ab..e157a2b4fcb9 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -5314,7 +5314,6 @@ static void ice_update_vsi_ring_stats(struct ice_vsi *vsi)
 	vsi->tx_linearize = 0;
 	vsi->rx_buf_failed = 0;
 	vsi->rx_page_failed = 0;
-	vsi->rx_gro_dropped = 0;
 
 	rcu_read_lock();
 
@@ -5329,7 +5328,6 @@ static void ice_update_vsi_ring_stats(struct ice_vsi *vsi)
 		vsi_stats->rx_bytes += bytes;
 		vsi->rx_buf_failed += ring->rx_stats.alloc_buf_failed;
 		vsi->rx_page_failed += ring->rx_stats.alloc_page_failed;
-		vsi->rx_gro_dropped += ring->rx_stats.gro_dropped;
 	}
 
 	/* update XDP Tx rings counters */
@@ -5361,7 +5359,7 @@ void ice_update_vsi_stats(struct ice_vsi *vsi)
 	ice_update_eth_stats(vsi);
 
 	cur_ns->tx_errors = cur_es->tx_errors;
-	cur_ns->rx_dropped = cur_es->rx_discards + vsi->rx_gro_dropped;
+	cur_ns->rx_dropped = cur_es->rx_discards;
 	cur_ns->tx_dropped = cur_es->tx_discards;
 	cur_ns->multicast = cur_es->rx_multicast;
 
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h
index ff1a1cbd078e..6ce2046fc349 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.h
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.h
@@ -193,7 +193,6 @@ struct ice_rxq_stats {
 	u64 non_eop_descs;
 	u64 alloc_page_failed;
 	u64 alloc_buf_failed;
-	u64 gro_dropped; /* GRO returned dropped */
 };
 
 /* this enum matches hardware bits and is meant to be used by DYN_CTLN
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
index bc2f4390b51d..3601b7d8abe5 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx_lib.c
@@ -192,8 +192,6 @@ ice_receive_skb(struct ice_ring *rx_ring, struct sk_buff *skb, u16 vlan_tag)
 	    (vlan_tag & VLAN_VID_MASK))
 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
 	if (napi_gro_receive(&rx_ring->q_vector->napi, skb) == GRO_DROP) {
-		/* this is tracked separately to help us debug stack drops */
-		rx_ring->rx_stats.gro_dropped++;
 		netdev_dbg(rx_ring->netdev, "Receive Queue %d: Dropped packet from GRO\n",
 			   rx_ring->q_index);
 	}
-- 
2.29.2