net: dsa: ksz9477: move get_stats64 to ksz_common.c

The mib counters for the ksz9477 is same for the ksz9477 switch and
LAN937x switch. Hence moving it to ksz_common.c file in order to have it
generic function. The DSA hook get_stats64 now can call ksz_get_stats64.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20220426091048.9311-1-arun.ramadoss@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 96 insertions, 0 deletions

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index 9b9f570ebb0b..10f127b09e58 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -20,6 +20,102 @@
 
 #include "ksz_common.h"
 
+struct ksz_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;
+};
+
+void ksz_r_mib_stats64(struct ksz_device *dev, int port)
+{
+	struct rtnl_link_stats64 *stats;
+	struct ksz_stats_raw *raw;
+	struct ksz_port_mib *mib;
+
+	mib = &dev->ports[port].mib;
+	stats = &mib->stats64;
+	raw = (struct ksz_stats_raw *)mib->counters;
+
+	spin_lock(&mib->stats64_lock);
+
+	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;
+
+	spin_unlock(&mib->stats64_lock);
+}
+EXPORT_SYMBOL_GPL(ksz_r_mib_stats64);
+
+void ksz_get_stats64(struct dsa_switch *ds, int port,
+		     struct rtnl_link_stats64 *s)
+{
+	struct ksz_device *dev = ds->priv;
+	struct ksz_port_mib *mib;
+
+	mib = &dev->ports[port].mib;
+
+	spin_lock(&mib->stats64_lock);
+	memcpy(s, &mib->stats64, sizeof(*s));
+	spin_unlock(&mib->stats64_lock);
+}
+EXPORT_SYMBOL_GPL(ksz_get_stats64);
+
 void ksz_update_port_member(struct ksz_device *dev, int port)
 {
 	struct ksz_port *p = &dev->ports[port];