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Date:   Tue,  3 Aug 2021 18:36:25 +0200
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>,
        Lukasz Czapnik <lukasz.czapnik@...el.com>,
        Marcin Kubiak <marcin.kubiak@...el.com>,
        Michal Kubiak <michal.kubiak@...el.com>,
        Michal Swiatkowski <michal.swiatkowski@...el.com>,
        Jonathan Corbet <corbet@....net>,
        Netanel Belgazal <netanel@...zon.com>,
        Arthur Kiyanovski <akiyano@...zon.com>,
        Guy Tzalik <gtzalik@...zon.com>,
        Saeed Bishara <saeedb@...zon.com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Russell King <linux@...linux.org.uk>,
        Edward Cree <ecree.xilinx@...il.com>,
        Martin Habets <habetsm.xilinx@...il.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        KP Singh <kpsingh@...nel.org>,
        Shay Agroskin <shayagr@...zon.com>,
        Sameeh Jubran <sameehj@...zon.com>,
        Alexander Duyck <alexanderduyck@...com>,
        Danielle Ratson <danieller@...dia.com>,
        Ido Schimmel <idosch@...dia.com>, Andrew Lunn <andrew@...n.ch>,
        Vladyslav Tarasiuk <vladyslavt@...dia.com>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jian Shen <shenjian15@...wei.com>,
        Petr Vorel <petr.vorel@...il.com>, Dan Murphy <dmurphy@...com>,
        Yangbo Lu <yangbo.lu@....com>,
        Michal Kubecek <mkubecek@...e.cz>,
        Zheng Yongjun <zhengyongjun3@...wei.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        YueHaibing <yuehaibing@...wei.com>,
        Johannes Berg <johannes@...solutions.net>,
        netdev@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, bpf@...r.kernel.org
Subject: [PATCH net-next 05/21] ethernet, dpaa2: convert to standard XDP stats

DPAA2 driver has 4 XDP counters which align just fine with the
standard XDP stats. Convert the driver to use the new approach.

Note that those counters are stored per-channel, but originally
were being given to Ethtool as sums across all channels. This
change makes them per-channel in Ethtool as well by providing
a number of channels to the standard 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.h  |  4 +--
 .../ethernet/freescale/dpaa2/dpaa2-ethtool.c  | 36 ++++++++++++++++---
 2 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
index 8cb57f103d6b..fbba28fbb527 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
@@ -377,13 +377,13 @@ struct dpaa2_eth_ch_stats {
 	__u64 pull_err;
 	/* Number of CDANs; useful to estimate avg NAPI len */
 	__u64 cdan;
+	/* The rest of the structure does not show up in ethtool stats */
+	struct { } __eth_end;
 	/* XDP counters */
 	__u64 xdp_drop;
 	__u64 xdp_tx;
 	__u64 xdp_tx_err;
 	__u64 xdp_redirect;
-	/* The rest of the structure does not show up in ethtool stats */
-	struct { } __eth_end;
 	/* Must be last */
 	__u64 frames;
 };
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
index 95ae83905458..6529fa35c532 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
@@ -53,10 +53,6 @@ static char dpaa2_ethtool_extras[][ETH_GSTRING_LEN] = {
 	"[drv] dequeue portal busy",
 	"[drv] channel pull errors",
 	"[drv] cdan",
-	"[drv] xdp drop",
-	"[drv] xdp tx",
-	"[drv] xdp tx errors",
-	"[drv] xdp redirect",
 	/* FQ stats */
 	"[qbman] rx pending frames",
 	"[qbman] rx pending bytes",
@@ -317,6 +313,36 @@ static void dpaa2_eth_get_ethtool_stats(struct net_device *net_dev,
 		dpaa2_mac_get_ethtool_stats(priv->mac, data + i);
 }
 
+static int dpaa2_eth_get_std_stats_channels(struct net_device *net_dev,
+					    u32 sset)
+{
+	const struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
+
+	switch (sset) {
+	case ETH_SS_STATS_XDP:
+		return priv->num_channels;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static void dpaa2_eth_get_xdp_stats(struct net_device *net_dev,
+				    struct ethtool_xdp_stats *xdp_stats)
+{
+	const struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
+	const struct dpaa2_eth_ch_stats *ch_stats;
+	u32 i;
+
+	for (i = 0; i < priv->num_channels; i++) {
+		ch_stats = &priv->channel[i]->stats;
+
+		xdp_stats[i].drop = ch_stats->xdp_drop;
+		xdp_stats[i].redirect = ch_stats->xdp_redirect;
+		xdp_stats[i].tx = ch_stats->xdp_tx;
+		xdp_stats[i].tx_errors = ch_stats->xdp_tx_err;
+	}
+}
+
 static int dpaa2_eth_prep_eth_rule(struct ethhdr *eth_value, struct ethhdr *eth_mask,
 				   void *key, void *mask, u64 *fields)
 {
@@ -836,4 +862,6 @@ const struct ethtool_ops dpaa2_ethtool_ops = {
 	.get_ts_info = dpaa2_eth_get_ts_info,
 	.get_tunable = dpaa2_eth_get_tunable,
 	.set_tunable = dpaa2_eth_set_tunable,
+	.get_std_stats_channels = dpaa2_eth_get_std_stats_channels,
+	.get_xdp_stats = dpaa2_eth_get_xdp_stats,
 };
-- 
2.31.1

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