1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ti/icssg/icssg_stats.c b/drivers/net/ethernet/ti/icssg/icssg_stats.c
new file mode 100644
index 000000000000..7159baa0155c
--- /dev/null
+++ b/drivers/net/ethernet/ti/icssg/icssg_stats.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Texas Instruments ICSSG Ethernet driver
+ *
+ * Copyright (C) 2018-2021 Texas Instruments Incorporated - https://www.ti.com/
+ *
+ */
+
+#include "icssg_prueth.h"
+#include "icssg_stats.h"
+#include <linux/regmap.h>
+
+#define ICSSG_TX_PACKET_OFFSET	0xA0
+#define ICSSG_TX_BYTE_OFFSET	0xEC
+
+static u32 stats_base[] = {	0x54c,	/* Slice 0 stats start */
+				0xb18,	/* Slice 1 stats start */
+};
+
+void emac_update_hardware_stats(struct prueth_emac *emac)
+{
+	struct prueth *prueth = emac->prueth;
+	int slice = prueth_emac_slice(emac);
+	u32 base = stats_base[slice];
+	u32 tx_pkt_cnt = 0;
+	u32 val, reg;
+	int i;
+
+	spin_lock(&prueth->stats_lock);
+
+	for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++) {
+		/* In MII mode TX lines are swapped inside ICSSG, so read Tx stats
+		 * from slice1 for port0 and slice0 for port1 to get accurate Tx
+		 * stats for a given port
+		 */
+		if (emac->phy_if == PHY_INTERFACE_MODE_MII &&
+		    icssg_all_miig_stats[i].offset >= ICSSG_TX_PACKET_OFFSET &&
+		    icssg_all_miig_stats[i].offset <= ICSSG_TX_BYTE_OFFSET)
+			base = stats_base[slice ^ 1];
+		regmap_read(prueth->miig_rt,
+			    base + icssg_all_miig_stats[i].offset,
+			    &val);
+		regmap_write(prueth->miig_rt,
+			     base + icssg_all_miig_stats[i].offset,
+			     val);
+
+		if (icssg_all_miig_stats[i].offset == ICSSG_TX_PACKET_OFFSET)
+			tx_pkt_cnt = val;
+
+		emac->stats[i] += val;
+		if (icssg_all_miig_stats[i].offset == ICSSG_TX_BYTE_OFFSET)
+			emac->stats[i] -= tx_pkt_cnt * 8;
+	}
+
+	if (prueth->pa_stats) {
+		for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) {
+			reg = icssg_all_pa_stats[i].offset +
+			      slice * sizeof(u32);
+			regmap_read(prueth->pa_stats, reg, &val);
+			emac->pa_stats[i] += val;
+		}
+	}
+
+	spin_unlock(&prueth->stats_lock);
+}
+
+void icssg_stats_work_handler(struct work_struct *work)
+{
+	struct prueth_emac *emac = container_of(work, struct prueth_emac,
+						stats_work.work);
+	emac_update_hardware_stats(emac);
+
+	queue_delayed_work(system_long_wq, &emac->stats_work,
+			   msecs_to_jiffies((STATS_TIME_LIMIT_1G_MS * 1000) / emac->speed));
+}
+EXPORT_SYMBOL_GPL(icssg_stats_work_handler);
+
+int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++) {
+		if (!strcmp(icssg_all_miig_stats[i].name, stat_name))
+			return emac->stats[icssg_all_miig_stats[i].offset / sizeof(u32)];
+	}
+
+	if (emac->prueth->pa_stats) {
+		for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) {
+			if (!strcmp(icssg_all_pa_stats[i].name, stat_name))
+				return emac->pa_stats[i];
+		}
+	}
+
+	netdev_err(emac->ndev, "Invalid stats %s\n", stat_name);
+	return -EINVAL;
+}