linux-kernel - [PATCH v2 net-next 04/26] dpaa2: implement generic XDP stats callbacks

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Date:   Tue, 23 Nov 2021 17:39:33 +0100
From:   Alexander Lobakin <alexandr.lobakin@...el.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Alexander Lobakin <alexandr.lobakin@...el.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Jonathan Corbet <corbet@....net>,
        Shay Agroskin <shayagr@...zon.com>,
        Arthur Kiyanovski <akiyano@...zon.com>,
        David Arinzon <darinzon@...zon.com>,
        Noam Dagan <ndagan@...zon.com>,
        Saeed Bishara <saeedb@...zon.com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Russell King <linux@...linux.org.uk>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        Toke Høiland-Jørgensen <toke@...hat.com>,
        John Fastabend <john.fastabend@...il.com>,
        Edward Cree <ecree.xilinx@...il.com>,
        Martin Habets <habetsm.xilinx@...il.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        KP Singh <kpsingh@...nel.org>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Yajun Deng <yajun.deng@...ux.dev>,
        Sergey Ryazanov <ryazanov.s.a@...il.com>,
        David Ahern <dsahern@...nel.org>,
        Andrei Vagin <avagin@...il.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Cong Wang <cong.wang@...edance.com>, netdev@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rdma@...r.kernel.org, bpf@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: [PATCH v2 net-next 04/26] dpaa2: implement generic XDP stats callbacks

Add an ability to dpaa2 to query its 5 per-channel XDP counters
using generic XDP stats infra.

Signed-off-by: Alexander Lobakin <alexandr.lobakin@...el.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
---
 .../net/ethernet/freescale/dpaa2/dpaa2-eth.c  | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index 6451c8383639..7715aecedacc 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -1973,6 +1973,49 @@ static void dpaa2_eth_get_stats(struct net_device *net_dev,
 	}
 }

+static int dpaa2_eth_get_xdp_stats_nch(const struct net_device *net_dev,
+				       u32 attr_id)
+{
+	const struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
+
+	switch (attr_id) {
+	case IFLA_XDP_XSTATS_TYPE_XDP:
+		return priv->num_channels;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int dpaa2_eth_get_xdp_stats(const struct net_device *net_dev,
+				   u32 attr_id, void *attr_data)
+{
+	const struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
+	struct ifla_xdp_stats *xdp_stats = attr_data;
+	u32 i;
+
+	switch (attr_id) {
+	case IFLA_XDP_XSTATS_TYPE_XDP:
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	for (i = 0; i < priv->num_channels; i++) {
+		const struct dpaa2_eth_ch_stats *ch_stats;
+
+		ch_stats = &priv->channel[i]->stats;
+
+		xdp_stats->drop = ch_stats->xdp_drop;
+		xdp_stats->redirect = ch_stats->xdp_redirect;
+		xdp_stats->tx = ch_stats->xdp_tx;
+		xdp_stats->tx_errors = ch_stats->xdp_tx_err;
+
+		xdp_stats++;
+	}
+
+	return 0;
+}
+
 /* Copy mac unicast addresses from @net_dev to @priv.
  * Its sole purpose is to make dpaa2_eth_set_rx_mode() more readable.
  */
@@ -2601,6 +2644,8 @@ static const struct net_device_ops dpaa2_eth_ops = {
 	.ndo_stop = dpaa2_eth_stop,
 	.ndo_set_mac_address = dpaa2_eth_set_addr,
 	.ndo_get_stats64 = dpaa2_eth_get_stats,
+	.ndo_get_xdp_stats_nch = dpaa2_eth_get_xdp_stats_nch,
+	.ndo_get_xdp_stats = dpaa2_eth_get_xdp_stats,
 	.ndo_set_rx_mode = dpaa2_eth_set_rx_mode,
 	.ndo_set_features = dpaa2_eth_set_features,
 	.ndo_eth_ioctl = dpaa2_eth_ioctl,
--
2.33.1