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Date: Thu, 17 Feb 2022 15:07:26 +0100
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Woojung Huh <woojung.huh@...rochip.com>,
UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Vivien Didelot <vivien.didelot@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next v1 1/1] net: dsa: microchip: ksz9477: export HW stats over stats64 interface
Provide access to HW offloaded packets over stats64 interface.
The rx/tx_bytes values needed some fixing since HW is accounting size of
the Ethernet frame together with FCS.
Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
drivers/net/dsa/microchip/ksz9477.c | 83 +++++++++++++++++++++++++++++
1 file changed, 83 insertions(+)
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index a85d990896b0..d0990f536a36 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -64,6 +64,88 @@ static const struct {
{ 0x83, "tx_discards" },
};
+struct ksz9477_stats_raw {
+ u64 rx_hi;
+ u64 rx_undersize;
+ u64 rx_fragments;
+ u64 rx_oversize;
+ u64 rx_jabbers;
+ u64 rx_symbol_err;
+ u64 rx_crc_err;
+ u64 rx_align_err;
+ u64 rx_mac_ctrl;
+ u64 rx_pause;
+ u64 rx_bcast;
+ u64 rx_mcast;
+ u64 rx_ucast;
+ u64 rx_64_or_less;
+ u64 rx_65_127;
+ u64 rx_128_255;
+ u64 rx_256_511;
+ u64 rx_512_1023;
+ u64 rx_1024_1522;
+ u64 rx_1523_2000;
+ u64 rx_2001;
+ u64 tx_hi;
+ u64 tx_late_col;
+ u64 tx_pause;
+ u64 tx_bcast;
+ u64 tx_mcast;
+ u64 tx_ucast;
+ u64 tx_deferred;
+ u64 tx_total_col;
+ u64 tx_exc_col;
+ u64 tx_single_col;
+ u64 tx_mult_col;
+ u64 rx_total;
+ u64 tx_total;
+ u64 rx_discards;
+ u64 tx_discards;
+};
+
+static void ksz9477_get_stats64(struct dsa_switch *ds, int port,
+ struct rtnl_link_stats64 *stats)
+{
+ struct ksz_device *dev = ds->priv;
+ struct ksz9477_stats_raw *raw;
+ struct ksz_port_mib *mib;
+ int ret;
+
+ mib = &dev->ports[port].mib;
+ raw = (struct ksz9477_stats_raw *)mib->counters;
+
+ mutex_lock(&mib->cnt_mutex);
+
+ stats->rx_packets = raw->rx_bcast + raw->rx_mcast + raw->rx_ucast;
+ stats->tx_packets = raw->tx_bcast + raw->tx_mcast + raw->tx_ucast;
+
+ /* HW counters are counting bytes + FCS which is not acceptable
+ * for rtnl_link_stats64 interface
+ */
+ stats->rx_bytes = raw->rx_total - stats->rx_packets * ETH_FCS_LEN;
+ stats->tx_bytes = raw->tx_total - stats->tx_packets * ETH_FCS_LEN;
+
+ stats->rx_length_errors = raw->rx_undersize + raw->rx_fragments +
+ raw->rx_oversize;
+
+ stats->rx_crc_errors = raw->rx_crc_err;
+ stats->rx_frame_errors = raw->rx_align_err;
+ stats->rx_dropped = raw->rx_discards;
+ stats->rx_errors = stats->rx_length_errors + stats->rx_crc_errors +
+ stats->rx_frame_errors + stats->rx_dropped;
+
+ stats->tx_window_errors = raw->tx_late_col;
+ stats->tx_fifo_errors = raw->tx_discards;
+ stats->tx_aborted_errors = raw->tx_exc_col;
+ stats->tx_errors = stats->tx_window_errors + stats->tx_fifo_errors +
+ stats->tx_aborted_errors;
+
+ stats->multicast = raw->rx_mcast;
+ stats->collisions = raw->tx_total_col;
+
+ mutex_unlock(&mib->cnt_mutex);
+}
+
static void ksz_cfg(struct ksz_device *dev, u32 addr, u8 bits, bool set)
{
regmap_update_bits(dev->regmap[0], addr, bits, set ? bits : 0);
@@ -1365,6 +1447,7 @@ static const struct dsa_switch_ops ksz9477_switch_ops = {
.port_mdb_del = ksz9477_port_mdb_del,
.port_mirror_add = ksz9477_port_mirror_add,
.port_mirror_del = ksz9477_port_mirror_del,
+ .get_stats64 = ksz9477_get_stats64,
};
static u32 ksz9477_get_port_addr(int port, int offset)
--
2.30.2
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