diff --git a/Documentation/ABI/testing/sysfs-bus-mdio b/Documentation/ABI/testing/sysfs-bus-mdio
new file mode 100644
index 000000000000..da86efc7781b
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-mdio
@@ -0,0 +1,63 @@
+What:          /sys/bus/mdio_bus/devices/.../statistics/
+Date:          January 2020
+KernelVersion: 5.6
+Contact:       netdev@vger.kernel.org
+Description:
+		This folder contains statistics about global and per
+		MDIO bus address statistics.
+
+What:          /sys/bus/mdio_bus/devices/.../statistics/transfers
+Date:          January 2020
+KernelVersion: 5.6
+Contact:       netdev@vger.kernel.org
+Description:
+		Total number of transfers for this MDIO bus.
+
+What:          /sys/bus/mdio_bus/devices/.../statistics/errors
+Date:          January 2020
+KernelVersion: 5.6
+Contact:       netdev@vger.kernel.org
+Description:
+		Total number of transfer errors for this MDIO bus.
+
+What:          /sys/bus/mdio_bus/devices/.../statistics/writes
+Date:          January 2020
+KernelVersion: 5.6
+Contact:       netdev@vger.kernel.org
+Description:
+		Total number of write transactions for this MDIO bus.
+
+What:          /sys/bus/mdio_bus/devices/.../statistics/reads
+Date:          January 2020
+KernelVersion: 5.6
+Contact:       netdev@vger.kernel.org
+Description:
+		Total number of read transactions for this MDIO bus.
+
+What:          /sys/bus/mdio_bus/devices/.../statistics/transfers_<addr>
+Date:          January 2020
+KernelVersion: 5.6
+Contact:       netdev@vger.kernel.org
+Description:
+		Total number of transfers for this MDIO bus address.
+
+What:          /sys/bus/mdio_bus/devices/.../statistics/errors_<addr>
+Date:          January 2020
+KernelVersion: 5.6
+Contact:       netdev@vger.kernel.org
+Description:
+		Total number of transfer errors for this MDIO bus address.
+
+What:          /sys/bus/mdio_bus/devices/.../statistics/writes_<addr>
+Date:          January 2020
+KernelVersion: 5.6
+Contact:       netdev@vger.kernel.org
+Description:
+		Total number of write transactions for this MDIO bus address.
+
+What:          /sys/bus/mdio_bus/devices/.../statistics/reads_<addr>
+Date:          January 2020
+KernelVersion: 5.6
+Contact:       netdev@vger.kernel.org
+Description:
+		Total number of read transactions for this MDIO bus address.
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 8d753bb07227..f2d017b09362 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -158,9 +158,11 @@ struct mii_bus *mdiobus_alloc_size(size_t size)
 	if (size)
 		bus->priv = (void *)bus + aligned_size;
 
-	/* Initialise the interrupts to polling */
-	for (i = 0; i < PHY_MAX_ADDR; i++)
+	/* Initialise the interrupts to polling and 64-bit seqcounts */
+	for (i = 0; i < PHY_MAX_ADDR; i++) {
 		bus->irq[i] = PHY_POLL;
+		u64_stats_init(&bus->stats[i].syncp);
+	}
 
 	return bus;
 }
@@ -249,9 +251,190 @@ static void mdiobus_release(struct device *d)
 	kfree(bus);
 }
 
+#define MDIO_BUS_STATS_ATTR(field, file)				\
+static ssize_t mdio_bus_##field##_show(struct device *dev,		\
+				       struct device_attribute *attr,	\
+				       char *buf)			\
+{									\
+	struct mii_bus *bus = to_mii_bus(dev);				\
+	return mdio_bus_global_stats_##field##_show(bus, buf);		\
+}									\
+static struct device_attribute dev_attr_mdio_bus_##field = {		\
+	.attr = { .name = file, .mode = 0444 },				\
+	.show = mdio_bus_##field##_show,				\
+};									\
+static ssize_t mdio_bus_device_##field##_show(struct device *dev,	\
+					      struct device_attribute *attr,\
+					      char *buf)		\
+{									\
+	struct mdio_device *mdiodev = to_mdio_device(dev);		\
+	struct mii_bus *bus = mdiodev->bus;				\
+	int addr = mdiodev->addr;					\
+	return mdio_bus_stats_##field##_show(&bus->stats[addr], buf);	\
+}									\
+static struct device_attribute dev_attr_mdio_bus_device_##field = {	\
+	.attr = { .name = file, .mode = 0444 },				\
+	.show = mdio_bus_device_##field##_show,				\
+}
+
+#define MDIO_BUS_STATS_SHOW_NAME(name, file, field)			\
+static ssize_t mdio_bus_stats_##name##_show(struct mdio_bus_stats *s,	\
+					    char *buf)			\
+{									\
+	unsigned int start;						\
+	ssize_t len;							\
+	u64 tmp = 0;							\
+	do {								\
+		start = u64_stats_fetch_begin(&s->syncp);		\
+		tmp += u64_stats_read(&s->field);			\
+	} while (u64_stats_fetch_retry(&s->syncp, start));		\
+	len = sprintf(buf, "%llu\n", tmp);				\
+	return len;							\
+}									\
+static ssize_t mdio_bus_global_stats_##name##_show(struct mii_bus *bus,	\
+						   char *buf)		\
+{									\
+	struct mdio_bus_stats *s;					\
+	unsigned int start;						\
+	unsigned int i;							\
+	ssize_t len;							\
+	u64 tmp = 0;							\
+	for (i = 0; i < PHY_MAX_ADDR; i++) {				\
+		s = &bus->stats[i];					\
+		do {							\
+			start = u64_stats_fetch_begin(&s->syncp);	\
+			tmp += u64_stats_read(&s->field);		\
+		} while (u64_stats_fetch_retry(&s->syncp, start));	\
+	}								\
+	len = sprintf(buf, "%llu\n", tmp);				\
+	return len;							\
+}									\
+MDIO_BUS_STATS_ATTR(name, file)
+
+#define MDIO_BUS_STATS_SHOW(field)					\
+	MDIO_BUS_STATS_SHOW_NAME(field, __stringify(field), field)
+
+#define MDIO_BUS_STATS_ADDR_ATTR(field, addr, file)			\
+static ssize_t mdio_bus_##field##_##addr##_show(struct device *dev,	\
+						struct device_attribute *attr, \
+						char *buf)		\
+{									\
+	struct mii_bus *bus = to_mii_bus(dev);				\
+	return mdio_bus_stats_##field##_show(&bus->stats[addr], buf);	\
+}									\
+static struct device_attribute dev_attr_mdio_bus_addr_##field##_##addr = { \
+	.attr = { .name = file, .mode = 0444 },				\
+	.show = mdio_bus_##field##_##addr##_show,			\
+}									\
+
+#define MDIO_BUS_STATS_ADDR_SHOW(field, addr)				\
+	MDIO_BUS_STATS_ADDR_ATTR(field, addr,				\
+				 __stringify(field) "_" __stringify(addr))
+
+MDIO_BUS_STATS_SHOW(transfers);
+MDIO_BUS_STATS_SHOW(errors);
+MDIO_BUS_STATS_SHOW(writes);
+MDIO_BUS_STATS_SHOW(reads);
+
+#define MDIO_BUS_STATS_ADDR_SHOW_GROUP(addr)				\
+	MDIO_BUS_STATS_ADDR_SHOW(transfers, addr);			\
+	MDIO_BUS_STATS_ADDR_SHOW(errors, addr);				\
+	MDIO_BUS_STATS_ADDR_SHOW(writes, addr);				\
+	MDIO_BUS_STATS_ADDR_SHOW(reads, addr)				\
+
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(0);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(1);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(2);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(3);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(4);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(5);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(6);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(7);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(8);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(9);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(10);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(11);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(12);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(13);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(14);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(15);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(16);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(17);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(18);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(19);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(20);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(21);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(22);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(23);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(24);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(25);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(26);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(27);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(28);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(29);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(30);
+MDIO_BUS_STATS_ADDR_SHOW_GROUP(31);
+
+#define MDIO_BUS_STATS_ADDR_ATTR_GROUP(addr)				\
+	&dev_attr_mdio_bus_addr_transfers_##addr.attr,			\
+	&dev_attr_mdio_bus_addr_errors_##addr.attr,			\
+	&dev_attr_mdio_bus_addr_writes_##addr.attr,			\
+	&dev_attr_mdio_bus_addr_reads_##addr.attr			\
+
+static struct attribute *mdio_bus_statistics_attrs[] = {
+	&dev_attr_mdio_bus_transfers.attr,
+	&dev_attr_mdio_bus_errors.attr,
+	&dev_attr_mdio_bus_writes.attr,
+	&dev_attr_mdio_bus_reads.attr,
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(0),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(1),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(2),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(3),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(4),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(5),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(6),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(7),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(8),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(9),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(10),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(11),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(12),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(13),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(14),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(15),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(16),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(17),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(18),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(19),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(20),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(21),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(22),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(23),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(24),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(25),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(26),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(27),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(28),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(29),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(30),
+	MDIO_BUS_STATS_ADDR_ATTR_GROUP(31),
+	NULL,
+};
+
+static const struct attribute_group mdio_bus_statistics_group = {
+	.name	= "statistics",
+	.attrs	= mdio_bus_statistics_attrs,
+};
+
+static const struct attribute_group *mdio_bus_groups[] = {
+	&mdio_bus_statistics_group,
+	NULL,
+};
+
 static struct class mdio_bus_class = {
 	.name		= "mdio_bus",
 	.dev_release	= mdiobus_release,
+	.dev_groups	= mdio_bus_groups,
 };
 
 #if IS_ENABLED(CONFIG_OF_MDIO)
@@ -530,6 +713,24 @@ struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
 }
 EXPORT_SYMBOL(mdiobus_scan);
 
+static void mdiobus_stats_acct(struct mdio_bus_stats *stats, bool op, int ret)
+{
+	u64_stats_update_begin(&stats->syncp);
+
+	u64_stats_inc(&stats->transfers);
+	if (ret < 0) {
+		u64_stats_inc(&stats->errors);
+		goto out;
+	}
+
+	if (op)
+		u64_stats_inc(&stats->reads);
+	else
+		u64_stats_inc(&stats->writes);
+out:
+	u64_stats_update_end(&stats->syncp);
+}
+
 /**
  * __mdiobus_read - Unlocked version of the mdiobus_read function
  * @bus: the mii_bus struct
@@ -549,6 +750,7 @@ int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)
 	retval = bus->read(bus, addr, regnum);
 
 	trace_mdio_access(bus, 1, addr, regnum, retval, retval);
+	mdiobus_stats_acct(&bus->stats[addr], true, retval);
 
 	return retval;
 }
@@ -574,6 +776,7 @@ int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)
 	err = bus->write(bus, addr, regnum, val);
 
 	trace_mdio_access(bus, 0, addr, regnum, val, err);
+	mdiobus_stats_acct(&bus->stats[addr], false, err);
 
 	return err;
 }
@@ -719,8 +922,27 @@ static int mdio_uevent(struct device *dev, struct kobj_uevent_env *env)
 	return 0;
 }
 
+static struct attribute *mdio_bus_device_statistics_attrs[] = {
+	&dev_attr_mdio_bus_device_transfers.attr,
+	&dev_attr_mdio_bus_device_errors.attr,
+	&dev_attr_mdio_bus_device_writes.attr,
+	&dev_attr_mdio_bus_device_reads.attr,
+	NULL,
+};
+
+static const struct attribute_group mdio_bus_device_statistics_group = {
+	.name	= "statistics",
+	.attrs	= mdio_bus_device_statistics_attrs,
+};
+
+static const struct attribute_group *mdio_bus_dev_groups[] = {
+	&mdio_bus_device_statistics_group,
+	NULL,
+};
+
 struct bus_type mdio_bus_type = {
 	.name		= "mdio_bus",
+	.dev_groups	= mdio_bus_dev_groups,
 	.match		= mdio_bus_match,
 	.uevent		= mdio_uevent,
 };
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 2929d0bc307f..b7de7d45135e 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -22,6 +22,7 @@
 #include <linux/timer.h>
 #include <linux/workqueue.h>
 #include <linux/mod_devicetable.h>
+#include <linux/u64_stats_sync.h>
 
 #include <linux/atomic.h>
 
@@ -212,6 +213,14 @@ struct sfp_bus;
 struct sfp_upstream_ops;
 struct sk_buff;
 
+struct mdio_bus_stats {
+	struct u64_stats_sync syncp;
+	u64_stats_t transfers;
+	u64_stats_t errors;
+	u64_stats_t writes;
+	u64_stats_t reads;
+};
+
 /*
  * The Bus class for PHYs.  Devices which provide access to
  * PHYs should register using this structure
@@ -224,6 +233,7 @@ struct mii_bus {
 	int (*read)(struct mii_bus *bus, int addr, int regnum);
 	int (*write)(struct mii_bus *bus, int addr, int regnum, u16 val);
 	int (*reset)(struct mii_bus *bus);
+	struct mdio_bus_stats stats[PHY_MAX_ADDR];
 
 	/*
 	 * A lock to ensure that only one thing can read/write
