1 files changed, 459 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mscc/ocelot_stats.c b/drivers/net/ethernet/mscc/ocelot_stats.c
new file mode 100644
index 000000000..6b95262da
--- /dev/null
+++ b/drivers/net/ethernet/mscc/ocelot_stats.c
@@ -0,0 +1,459 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/* Statistics for Ocelot switch family
+ *
+ * Copyright (c) 2017 Microsemi Corporation
+ * Copyright 2022 NXP
+ */
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+#include "ocelot.h"
+
+/* Read the counters from hardware and keep them in region->buf.
+ * Caller must hold &ocelot->stat_view_lock.
+ */
+static int ocelot_port_update_stats(struct ocelot *ocelot, int port)
+{
+	struct ocelot_stats_region *region;
+	int err;
+
+	/* Configure the port to read the stats from */
+	ocelot_write(ocelot, SYS_STAT_CFG_STAT_VIEW(port), SYS_STAT_CFG);
+
+	list_for_each_entry(region, &ocelot->stats_regions, node) {
+		err = ocelot_bulk_read(ocelot, region->base, region->buf,
+				       region->count);
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+/* Transfer the counters from region->buf to ocelot->stats.
+ * Caller must hold &ocelot->stat_view_lock and &ocelot->stats_lock.
+ */
+static void ocelot_port_transfer_stats(struct ocelot *ocelot, int port)
+{
+	unsigned int idx = port * OCELOT_NUM_STATS;
+	struct ocelot_stats_region *region;
+	int j;
+
+	list_for_each_entry(region, &ocelot->stats_regions, node) {
+		for (j = 0; j < region->count; j++) {
+			u64 *stat = &ocelot->stats[idx + j];
+			u64 val = region->buf[j];
+
+			if (val < (*stat & U32_MAX))
+				*stat += (u64)1 << 32;
+
+			*stat = (*stat & ~(u64)U32_MAX) + val;
+		}
+
+		idx += region->count;
+	}
+}
+
+static void ocelot_check_stats_work(struct work_struct *work)
+{
+	struct delayed_work *del_work = to_delayed_work(work);
+	struct ocelot *ocelot = container_of(del_work, struct ocelot,
+					     stats_work);
+	int port, err;
+
+	mutex_lock(&ocelot->stat_view_lock);
+
+	for (port = 0; port < ocelot->num_phys_ports; port++) {
+		err = ocelot_port_update_stats(ocelot, port);
+		if (err)
+			break;
+
+		spin_lock(&ocelot->stats_lock);
+		ocelot_port_transfer_stats(ocelot, port);
+		spin_unlock(&ocelot->stats_lock);
+	}
+
+	if (!err && ocelot->ops->update_stats)
+		ocelot->ops->update_stats(ocelot);
+
+	mutex_unlock(&ocelot->stat_view_lock);
+
+	if (err)
+		dev_err(ocelot->dev, "Error %d updating ethtool stats\n",  err);
+
+	queue_delayed_work(ocelot->stats_queue, &ocelot->stats_work,
+			   OCELOT_STATS_CHECK_DELAY);
+}
+
+void ocelot_get_strings(struct ocelot *ocelot, int port, u32 sset, u8 *data)
+{
+	int i;
+
+	if (sset != ETH_SS_STATS)
+		return;
+
+	for (i = 0; i < OCELOT_NUM_STATS; i++) {
+		if (ocelot->stats_layout[i].name[0] == '\0')
+			continue;
+
+		memcpy(data + i * ETH_GSTRING_LEN, ocelot->stats_layout[i].name,
+		       ETH_GSTRING_LEN);
+	}
+}
+EXPORT_SYMBOL(ocelot_get_strings);
+
+/* Update ocelot->stats for the given port and run the given callback */
+static void ocelot_port_stats_run(struct ocelot *ocelot, int port, void *priv,
+				  void (*cb)(struct ocelot *ocelot, int port,
+					     void *priv))
+{
+	int err;
+
+	mutex_lock(&ocelot->stat_view_lock);
+
+	err = ocelot_port_update_stats(ocelot, port);
+	if (err) {
+		dev_err(ocelot->dev, "Failed to update port %d stats: %pe\n",
+			port, ERR_PTR(err));
+		goto out_unlock;
+	}
+
+	spin_lock(&ocelot->stats_lock);
+
+	ocelot_port_transfer_stats(ocelot, port);
+	cb(ocelot, port, priv);
+
+	spin_unlock(&ocelot->stats_lock);
+
+out_unlock:
+	mutex_unlock(&ocelot->stat_view_lock);
+}
+
+int ocelot_get_sset_count(struct ocelot *ocelot, int port, int sset)
+{
+	int i, num_stats = 0;
+
+	if (sset != ETH_SS_STATS)
+		return -EOPNOTSUPP;
+
+	for (i = 0; i < OCELOT_NUM_STATS; i++)
+		if (ocelot->stats_layout[i].name[0] != '\0')
+			num_stats++;
+
+	return num_stats;
+}
+EXPORT_SYMBOL(ocelot_get_sset_count);
+
+static void ocelot_port_ethtool_stats_cb(struct ocelot *ocelot, int port,
+					 void *priv)
+{
+	u64 *data = priv;
+	int i;
+
+	/* Copy all supported counters */
+	for (i = 0; i < OCELOT_NUM_STATS; i++) {
+		int index = port * OCELOT_NUM_STATS + i;
+
+		if (ocelot->stats_layout[i].name[0] == '\0')
+			continue;
+
+		*data++ = ocelot->stats[index];
+	}
+}
+
+void ocelot_get_ethtool_stats(struct ocelot *ocelot, int port, u64 *data)
+{
+	ocelot_port_stats_run(ocelot, port, data, ocelot_port_ethtool_stats_cb);
+}
+EXPORT_SYMBOL(ocelot_get_ethtool_stats);
+
+static void ocelot_port_pause_stats_cb(struct ocelot *ocelot, int port, void *priv)
+{
+	u64 *s = &ocelot->stats[port * OCELOT_NUM_STATS];
+	struct ethtool_pause_stats *pause_stats = priv;
+
+	pause_stats->tx_pause_frames = s[OCELOT_STAT_TX_PAUSE];
+	pause_stats->rx_pause_frames = s[OCELOT_STAT_RX_PAUSE];
+}
+
+void ocelot_port_get_pause_stats(struct ocelot *ocelot, int port,
+				 struct ethtool_pause_stats *pause_stats)
+{
+	ocelot_port_stats_run(ocelot, port, pause_stats,
+			      ocelot_port_pause_stats_cb);
+}
+EXPORT_SYMBOL_GPL(ocelot_port_get_pause_stats);
+
+static const struct ethtool_rmon_hist_range ocelot_rmon_ranges[] = {
+	{   64,    64 },
+	{   65,   127 },
+	{  128,   255 },
+	{  256,   511 },
+	{  512,  1023 },
+	{ 1024,  1526 },
+	{ 1527, 65535 },
+	{},
+};
+
+static void ocelot_port_rmon_stats_cb(struct ocelot *ocelot, int port, void *priv)
+{
+	u64 *s = &ocelot->stats[port * OCELOT_NUM_STATS];
+	struct ethtool_rmon_stats *rmon_stats = priv;
+
+	rmon_stats->undersize_pkts = s[OCELOT_STAT_RX_SHORTS];
+	rmon_stats->oversize_pkts = s[OCELOT_STAT_RX_LONGS];
+	rmon_stats->fragments = s[OCELOT_STAT_RX_FRAGMENTS];
+	rmon_stats->jabbers = s[OCELOT_STAT_RX_JABBERS];
+
+	rmon_stats->hist[0] = s[OCELOT_STAT_RX_64];
+	rmon_stats->hist[1] = s[OCELOT_STAT_RX_65_127];
+	rmon_stats->hist[2] = s[OCELOT_STAT_RX_128_255];
+	rmon_stats->hist[3] = s[OCELOT_STAT_RX_256_511];
+	rmon_stats->hist[4] = s[OCELOT_STAT_RX_512_1023];
+	rmon_stats->hist[5] = s[OCELOT_STAT_RX_1024_1526];
+	rmon_stats->hist[6] = s[OCELOT_STAT_RX_1527_MAX];
+
+	rmon_stats->hist_tx[0] = s[OCELOT_STAT_TX_64];
+	rmon_stats->hist_tx[1] = s[OCELOT_STAT_TX_65_127];
+	rmon_stats->hist_tx[2] = s[OCELOT_STAT_TX_128_255];
+	rmon_stats->hist_tx[3] = s[OCELOT_STAT_TX_256_511];
+	rmon_stats->hist_tx[4] = s[OCELOT_STAT_TX_512_1023];
+	rmon_stats->hist_tx[5] = s[OCELOT_STAT_TX_1024_1526];
+	rmon_stats->hist_tx[6] = s[OCELOT_STAT_TX_1527_MAX];
+}
+
+void ocelot_port_get_rmon_stats(struct ocelot *ocelot, int port,
+				struct ethtool_rmon_stats *rmon_stats,
+				const struct ethtool_rmon_hist_range **ranges)
+{
+	*ranges = ocelot_rmon_ranges;
+
+	ocelot_port_stats_run(ocelot, port, rmon_stats,
+			      ocelot_port_rmon_stats_cb);
+}
+EXPORT_SYMBOL_GPL(ocelot_port_get_rmon_stats);
+
+static void ocelot_port_ctrl_stats_cb(struct ocelot *ocelot, int port, void *priv)
+{
+	u64 *s = &ocelot->stats[port * OCELOT_NUM_STATS];
+	struct ethtool_eth_ctrl_stats *ctrl_stats = priv;
+
+	ctrl_stats->MACControlFramesReceived = s[OCELOT_STAT_RX_CONTROL];
+}
+
+void ocelot_port_get_eth_ctrl_stats(struct ocelot *ocelot, int port,
+				    struct ethtool_eth_ctrl_stats *ctrl_stats)
+{
+	ocelot_port_stats_run(ocelot, port, ctrl_stats,
+			      ocelot_port_ctrl_stats_cb);
+}
+EXPORT_SYMBOL_GPL(ocelot_port_get_eth_ctrl_stats);
+
+static void ocelot_port_mac_stats_cb(struct ocelot *ocelot, int port, void *priv)
+{
+	u64 *s = &ocelot->stats[port * OCELOT_NUM_STATS];
+	struct ethtool_eth_mac_stats *mac_stats = priv;
+
+	mac_stats->OctetsTransmittedOK = s[OCELOT_STAT_TX_OCTETS];
+	mac_stats->FramesTransmittedOK = s[OCELOT_STAT_TX_64] +
+					 s[OCELOT_STAT_TX_65_127] +
+					 s[OCELOT_STAT_TX_128_255] +
+					 s[OCELOT_STAT_TX_256_511] +
+					 s[OCELOT_STAT_TX_512_1023] +
+					 s[OCELOT_STAT_TX_1024_1526] +
+					 s[OCELOT_STAT_TX_1527_MAX];
+	mac_stats->OctetsReceivedOK = s[OCELOT_STAT_RX_OCTETS];
+	mac_stats->FramesReceivedOK = s[OCELOT_STAT_RX_GREEN_PRIO_0] +
+				      s[OCELOT_STAT_RX_GREEN_PRIO_1] +
+				      s[OCELOT_STAT_RX_GREEN_PRIO_2] +
+				      s[OCELOT_STAT_RX_GREEN_PRIO_3] +
+				      s[OCELOT_STAT_RX_GREEN_PRIO_4] +
+				      s[OCELOT_STAT_RX_GREEN_PRIO_5] +
+				      s[OCELOT_STAT_RX_GREEN_PRIO_6] +
+				      s[OCELOT_STAT_RX_GREEN_PRIO_7] +
+				      s[OCELOT_STAT_RX_YELLOW_PRIO_0] +
+				      s[OCELOT_STAT_RX_YELLOW_PRIO_1] +
+				      s[OCELOT_STAT_RX_YELLOW_PRIO_2] +
+				      s[OCELOT_STAT_RX_YELLOW_PRIO_3] +
+				      s[OCELOT_STAT_RX_YELLOW_PRIO_4] +
+				      s[OCELOT_STAT_RX_YELLOW_PRIO_5] +
+				      s[OCELOT_STAT_RX_YELLOW_PRIO_6] +
+				      s[OCELOT_STAT_RX_YELLOW_PRIO_7];
+	mac_stats->MulticastFramesXmittedOK = s[OCELOT_STAT_TX_MULTICAST];
+	mac_stats->BroadcastFramesXmittedOK = s[OCELOT_STAT_TX_BROADCAST];
+	mac_stats->MulticastFramesReceivedOK = s[OCELOT_STAT_RX_MULTICAST];
+	mac_stats->BroadcastFramesReceivedOK = s[OCELOT_STAT_RX_BROADCAST];
+	mac_stats->FrameTooLongErrors = s[OCELOT_STAT_RX_LONGS];
+	/* Sadly, C_RX_CRC is the sum of FCS and alignment errors, they are not
+	 * counted individually.
+	 */
+	mac_stats->FrameCheckSequenceErrors = s[OCELOT_STAT_RX_CRC_ALIGN_ERRS];
+	mac_stats->AlignmentErrors = s[OCELOT_STAT_RX_CRC_ALIGN_ERRS];
+}
+
+void ocelot_port_get_eth_mac_stats(struct ocelot *ocelot, int port,
+				   struct ethtool_eth_mac_stats *mac_stats)
+{
+	ocelot_port_stats_run(ocelot, port, mac_stats,
+			      ocelot_port_mac_stats_cb);
+}
+EXPORT_SYMBOL_GPL(ocelot_port_get_eth_mac_stats);
+
+static void ocelot_port_phy_stats_cb(struct ocelot *ocelot, int port, void *priv)
+{
+	u64 *s = &ocelot->stats[port * OCELOT_NUM_STATS];
+	struct ethtool_eth_phy_stats *phy_stats = priv;
+
+	phy_stats->SymbolErrorDuringCarrier = s[OCELOT_STAT_RX_SYM_ERRS];
+}
+
+void ocelot_port_get_eth_phy_stats(struct ocelot *ocelot, int port,
+				   struct ethtool_eth_phy_stats *phy_stats)
+{
+	ocelot_port_stats_run(ocelot, port, phy_stats,
+			      ocelot_port_phy_stats_cb);
+}
+EXPORT_SYMBOL_GPL(ocelot_port_get_eth_phy_stats);
+
+void ocelot_port_get_stats64(struct ocelot *ocelot, int port,
+			     struct rtnl_link_stats64 *stats)
+{
+	u64 *s = &ocelot->stats[port * OCELOT_NUM_STATS];
+
+	spin_lock(&ocelot->stats_lock);
+
+	/* Get Rx stats */
+	stats->rx_bytes = s[OCELOT_STAT_RX_OCTETS];
+	stats->rx_packets = s[OCELOT_STAT_RX_SHORTS] +
+			    s[OCELOT_STAT_RX_FRAGMENTS] +
+			    s[OCELOT_STAT_RX_JABBERS] +
+			    s[OCELOT_STAT_RX_LONGS] +
+			    s[OCELOT_STAT_RX_64] +
+			    s[OCELOT_STAT_RX_65_127] +
+			    s[OCELOT_STAT_RX_128_255] +
+			    s[OCELOT_STAT_RX_256_511] +
+			    s[OCELOT_STAT_RX_512_1023] +
+			    s[OCELOT_STAT_RX_1024_1526] +
+			    s[OCELOT_STAT_RX_1527_MAX];
+	stats->multicast = s[OCELOT_STAT_RX_MULTICAST];
+	stats->rx_missed_errors = s[OCELOT_STAT_DROP_TAIL];
+	stats->rx_dropped = s[OCELOT_STAT_RX_RED_PRIO_0] +
+			    s[OCELOT_STAT_RX_RED_PRIO_1] +
+			    s[OCELOT_STAT_RX_RED_PRIO_2] +
+			    s[OCELOT_STAT_RX_RED_PRIO_3] +
+			    s[OCELOT_STAT_RX_RED_PRIO_4] +
+			    s[OCELOT_STAT_RX_RED_PRIO_5] +
+			    s[OCELOT_STAT_RX_RED_PRIO_6] +
+			    s[OCELOT_STAT_RX_RED_PRIO_7] +
+			    s[OCELOT_STAT_DROP_LOCAL] +
+			    s[OCELOT_STAT_DROP_YELLOW_PRIO_0] +
+			    s[OCELOT_STAT_DROP_YELLOW_PRIO_1] +
+			    s[OCELOT_STAT_DROP_YELLOW_PRIO_2] +
+			    s[OCELOT_STAT_DROP_YELLOW_PRIO_3] +
+			    s[OCELOT_STAT_DROP_YELLOW_PRIO_4] +
+			    s[OCELOT_STAT_DROP_YELLOW_PRIO_5] +
+			    s[OCELOT_STAT_DROP_YELLOW_PRIO_6] +
+			    s[OCELOT_STAT_DROP_YELLOW_PRIO_7] +
+			    s[OCELOT_STAT_DROP_GREEN_PRIO_0] +
+			    s[OCELOT_STAT_DROP_GREEN_PRIO_1] +
+			    s[OCELOT_STAT_DROP_GREEN_PRIO_2] +
+			    s[OCELOT_STAT_DROP_GREEN_PRIO_3] +
+			    s[OCELOT_STAT_DROP_GREEN_PRIO_4] +
+			    s[OCELOT_STAT_DROP_GREEN_PRIO_5] +
+			    s[OCELOT_STAT_DROP_GREEN_PRIO_6] +
+			    s[OCELOT_STAT_DROP_GREEN_PRIO_7];
+
+	/* Get Tx stats */
+	stats->tx_bytes = s[OCELOT_STAT_TX_OCTETS];
+	stats->tx_packets = s[OCELOT_STAT_TX_64] +
+			    s[OCELOT_STAT_TX_65_127] +
+			    s[OCELOT_STAT_TX_128_255] +
+			    s[OCELOT_STAT_TX_256_511] +
+			    s[OCELOT_STAT_TX_512_1023] +
+			    s[OCELOT_STAT_TX_1024_1526] +
+			    s[OCELOT_STAT_TX_1527_MAX];
+	stats->tx_dropped = s[OCELOT_STAT_TX_DROPS] +
+			    s[OCELOT_STAT_TX_AGED];
+	stats->collisions = s[OCELOT_STAT_TX_COLLISION];
+
+	spin_unlock(&ocelot->stats_lock);
+}
+EXPORT_SYMBOL(ocelot_port_get_stats64);
+
+static int ocelot_prepare_stats_regions(struct ocelot *ocelot)
+{
+	struct ocelot_stats_region *region = NULL;
+	unsigned int last;
+	int i;
+
+	INIT_LIST_HEAD(&ocelot->stats_regions);
+
+	for (i = 0; i < OCELOT_NUM_STATS; i++) {
+		if (!ocelot->stats_layout[i].reg)
+			continue;
+
+		if (region && ocelot->map[SYS][ocelot->stats_layout[i].reg & REG_MASK] ==
+		    ocelot->map[SYS][last & REG_MASK] + 4) {
+			region->count++;
+		} else {
+			region = devm_kzalloc(ocelot->dev, sizeof(*region),
+					      GFP_KERNEL);
+			if (!region)
+				return -ENOMEM;
+
+			region->base = ocelot->stats_layout[i].reg;
+			region->count = 1;
+			list_add_tail(&region->node, &ocelot->stats_regions);
+		}
+
+		last = ocelot->stats_layout[i].reg;
+	}
+
+	list_for_each_entry(region, &ocelot->stats_regions, node) {
+		region->buf = devm_kcalloc(ocelot->dev, region->count,
+					   sizeof(*region->buf), GFP_KERNEL);
+		if (!region->buf)
+			return -ENOMEM;
+	}
+
+	return 0;
+}
+
+int ocelot_stats_init(struct ocelot *ocelot)
+{
+	char queue_name[32];
+	int ret;
+
+	ocelot->stats = devm_kcalloc(ocelot->dev,
+				     ocelot->num_phys_ports * OCELOT_NUM_STATS,
+				     sizeof(u64), GFP_KERNEL);
+	if (!ocelot->stats)
+		return -ENOMEM;
+
+	snprintf(queue_name, sizeof(queue_name), "%s-stats",
+		 dev_name(ocelot->dev));
+	ocelot->stats_queue = create_singlethread_workqueue(queue_name);
+	if (!ocelot->stats_queue)
+		return -ENOMEM;
+
+	spin_lock_init(&ocelot->stats_lock);
+	mutex_init(&ocelot->stat_view_lock);
+
+	ret = ocelot_prepare_stats_regions(ocelot);
+	if (ret) {
+		destroy_workqueue(ocelot->stats_queue);
+		return ret;
+	}
+
+	INIT_DELAYED_WORK(&ocelot->stats_work, ocelot_check_stats_work);
+	queue_delayed_work(ocelot->stats_queue, &ocelot->stats_work,
+			   OCELOT_STATS_CHECK_DELAY);
+
+	return 0;
+}
+
+void ocelot_stats_deinit(struct ocelot *ocelot)
+{
+	cancel_delayed_work(&ocelot->stats_work);
+	destroy_workqueue(ocelot->stats_queue);
+}