net/dsa/devlink.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * DSA devlink handling
  */

 #include <net/dsa.h>
 #include <net/devlink.h>

 #include "devlink.h"

 static int dsa_devlink_info_get(struct devlink *dl,
 				struct devlink_info_req *req,
 				struct netlink_ext_ack *extack)
 {
 	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

 	if (ds->ops->devlink_info_get)
 		return ds->ops->devlink_info_get(ds, req, extack);

 	return -EOPNOTSUPP;
 }

 static int dsa_devlink_sb_pool_get(struct devlink *dl,
 				   unsigned int sb_index, u16 pool_index,
 				   struct devlink_sb_pool_info *pool_info)
 {
 	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

 	if (!ds->ops->devlink_sb_pool_get)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_pool_get(ds, sb_index, pool_index,
 					    pool_info);
 }

 static int dsa_devlink_sb_pool_set(struct devlink *dl, unsigned int sb_index,
 				   u16 pool_index, u32 size,
 				   enum devlink_sb_threshold_type threshold_type,
 				   struct netlink_ext_ack *extack)
 {
 	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

 	if (!ds->ops->devlink_sb_pool_set)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_pool_set(ds, sb_index, pool_index, size,
 					    threshold_type, extack);
 }

 static int dsa_devlink_sb_port_pool_get(struct devlink_port *dlp,
 					unsigned int sb_index, u16 pool_index,
 					u32 *p_threshold)
 {
 	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
 	int port = dsa_devlink_port_to_port(dlp);

 	if (!ds->ops->devlink_sb_port_pool_get)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_port_pool_get(ds, port, sb_index,
 						 pool_index, p_threshold);
 }

 static int dsa_devlink_sb_port_pool_set(struct devlink_port *dlp,
 					unsigned int sb_index, u16 pool_index,
 					u32 threshold,
 					struct netlink_ext_ack *extack)
 {
 	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
 	int port = dsa_devlink_port_to_port(dlp);

 	if (!ds->ops->devlink_sb_port_pool_set)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_port_pool_set(ds, port, sb_index,
 						 pool_index, threshold, extack);
 }

 static int
 dsa_devlink_sb_tc_pool_bind_get(struct devlink_port *dlp,
 				unsigned int sb_index, u16 tc_index,
 				enum devlink_sb_pool_type pool_type,
 				u16 *p_pool_index, u32 *p_threshold)
 {
 	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
 	int port = dsa_devlink_port_to_port(dlp);

 	if (!ds->ops->devlink_sb_tc_pool_bind_get)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_tc_pool_bind_get(ds, port, sb_index,
 						    tc_index, pool_type,
 						    p_pool_index, p_threshold);
 }

 static int
 dsa_devlink_sb_tc_pool_bind_set(struct devlink_port *dlp,
 				unsigned int sb_index, u16 tc_index,
 				enum devlink_sb_pool_type pool_type,
 				u16 pool_index, u32 threshold,
 				struct netlink_ext_ack *extack)
 {
 	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
 	int port = dsa_devlink_port_to_port(dlp);

 	if (!ds->ops->devlink_sb_tc_pool_bind_set)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_tc_pool_bind_set(ds, port, sb_index,
 						    tc_index, pool_type,
 						    pool_index, threshold,
 						    extack);
 }

 static int dsa_devlink_sb_occ_snapshot(struct devlink *dl,
 				       unsigned int sb_index)
 {
 	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

 	if (!ds->ops->devlink_sb_occ_snapshot)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_occ_snapshot(ds, sb_index);
 }

 static int dsa_devlink_sb_occ_max_clear(struct devlink *dl,
 					unsigned int sb_index)
 {
 	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

 	if (!ds->ops->devlink_sb_occ_max_clear)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_occ_max_clear(ds, sb_index);
 }

 static int dsa_devlink_sb_occ_port_pool_get(struct devlink_port *dlp,
 					    unsigned int sb_index,
 					    u16 pool_index, u32 *p_cur,
 					    u32 *p_max)
 {
 	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
 	int port = dsa_devlink_port_to_port(dlp);

 	if (!ds->ops->devlink_sb_occ_port_pool_get)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_occ_port_pool_get(ds, port, sb_index,
 						     pool_index, p_cur, p_max);
 }

 static int
 dsa_devlink_sb_occ_tc_port_bind_get(struct devlink_port *dlp,
 				    unsigned int sb_index, u16 tc_index,
 				    enum devlink_sb_pool_type pool_type,
 				    u32 *p_cur, u32 *p_max)
 {
 	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
 	int port = dsa_devlink_port_to_port(dlp);

 	if (!ds->ops->devlink_sb_occ_tc_port_bind_get)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_sb_occ_tc_port_bind_get(ds, port,
 							sb_index, tc_index,
 							pool_type, p_cur,
 							p_max);
 }

 static const struct devlink_ops dsa_devlink_ops = {
 	.info_get			= dsa_devlink_info_get,
 	.sb_pool_get			= dsa_devlink_sb_pool_get,
 	.sb_pool_set			= dsa_devlink_sb_pool_set,
 	.sb_port_pool_get		= dsa_devlink_sb_port_pool_get,
 	.sb_port_pool_set		= dsa_devlink_sb_port_pool_set,
 	.sb_tc_pool_bind_get		= dsa_devlink_sb_tc_pool_bind_get,
 	.sb_tc_pool_bind_set		= dsa_devlink_sb_tc_pool_bind_set,
 	.sb_occ_snapshot		= dsa_devlink_sb_occ_snapshot,
 	.sb_occ_max_clear		= dsa_devlink_sb_occ_max_clear,
 	.sb_occ_port_pool_get		= dsa_devlink_sb_occ_port_pool_get,
 	.sb_occ_tc_port_bind_get	= dsa_devlink_sb_occ_tc_port_bind_get,
 };

 int dsa_devlink_param_get(struct devlink *dl, u32 id,
 			  struct devlink_param_gset_ctx *ctx)
 {
 	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

 	if (!ds->ops->devlink_param_get)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_param_get(ds, id, ctx);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_param_get);

 int dsa_devlink_param_set(struct devlink *dl, u32 id,
 			  struct devlink_param_gset_ctx *ctx,
 			  struct netlink_ext_ack *extack)
 {
 	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

 	if (!ds->ops->devlink_param_set)
 		return -EOPNOTSUPP;

 	return ds->ops->devlink_param_set(ds, id, ctx);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_param_set);

 int dsa_devlink_params_register(struct dsa_switch *ds,
 				const struct devlink_param *params,
 				size_t params_count)
 {
 	return devlink_params_register(ds->devlink, params, params_count);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_params_register);

 void dsa_devlink_params_unregister(struct dsa_switch *ds,
 				   const struct devlink_param *params,
 				   size_t params_count)
 {
 	devlink_params_unregister(ds->devlink, params, params_count);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_params_unregister);

 int dsa_devlink_resource_register(struct dsa_switch *ds,
 				  const char *resource_name,
 				  u64 resource_size,
 				  u64 resource_id,
 				  u64 parent_resource_id,
 				  const struct devlink_resource_size_params *size_params)
 {
 	int ret;

 	devl_lock(ds->devlink);
 	ret = devl_resource_register(ds->devlink, resource_name, resource_size,
 				     resource_id, parent_resource_id,
 				     size_params);
 	devl_unlock(ds->devlink);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_resource_register);

 void dsa_devlink_resources_unregister(struct dsa_switch *ds)
 {
 	devlink_resources_unregister(ds->devlink);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_resources_unregister);

 void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
 					   u64 resource_id,
 					   devlink_resource_occ_get_t *occ_get,
 					   void *occ_get_priv)
 {
 	devl_lock(ds->devlink);
 	devl_resource_occ_get_register(ds->devlink, resource_id, occ_get,
 				       occ_get_priv);
 	devl_unlock(ds->devlink);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_resource_occ_get_register);

 void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
 					     u64 resource_id)
 {
 	devl_lock(ds->devlink);
 	devl_resource_occ_get_unregister(ds->devlink, resource_id);
 	devl_unlock(ds->devlink);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_resource_occ_get_unregister);

 struct devlink_region *
 dsa_devlink_region_create(struct dsa_switch *ds,
 			  const struct devlink_region_ops *ops,
 			  u32 region_max_snapshots, u64 region_size)
 {
 	return devlink_region_create(ds->devlink, ops, region_max_snapshots,
 				     region_size);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_region_create);

 struct devlink_region *
 dsa_devlink_port_region_create(struct dsa_switch *ds,
 			       int port,
 			       const struct devlink_port_region_ops *ops,
 			       u32 region_max_snapshots, u64 region_size)
 {
 	struct dsa_port *dp = dsa_to_port(ds, port);

 	return devlink_port_region_create(&dp->devlink_port, ops,
 					  region_max_snapshots,
 					  region_size);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_port_region_create);

 void dsa_devlink_region_destroy(struct devlink_region *region)
 {
 	devlink_region_destroy(region);
 }
 EXPORT_SYMBOL_GPL(dsa_devlink_region_destroy);

 int dsa_port_devlink_setup(struct dsa_port *dp)
 {
 	struct devlink_port *dlp = &dp->devlink_port;
 	struct dsa_switch_tree *dst = dp->ds->dst;
 	struct devlink_port_attrs attrs = {};
 	struct devlink *dl = dp->ds->devlink;
 	struct dsa_switch *ds = dp->ds;
 	const unsigned char *id;
 	unsigned char len;
 	int err;

 	memset(dlp, 0, sizeof(*dlp));
 	devlink_port_init(dl, dlp);

 	if (ds->ops->port_setup) {
 		err = ds->ops->port_setup(ds, dp->index);
 		if (err)
 			return err;
 	}

 	id = (const unsigned char *)&dst->index;
 	len = sizeof(dst->index);

 	attrs.phys.port_number = dp->index;
 	memcpy(attrs.switch_id.id, id, len);
 	attrs.switch_id.id_len = len;

 	switch (dp->type) {
 	case DSA_PORT_TYPE_UNUSED:
 		attrs.flavour = DEVLINK_PORT_FLAVOUR_UNUSED;
 		break;
 	case DSA_PORT_TYPE_CPU:
 		attrs.flavour = DEVLINK_PORT_FLAVOUR_CPU;
 		break;
 	case DSA_PORT_TYPE_DSA:
 		attrs.flavour = DEVLINK_PORT_FLAVOUR_DSA;
 		break;
 	case DSA_PORT_TYPE_USER:
 		attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
 		break;
 	}

 	devlink_port_attrs_set(dlp, &attrs);
 	err = devlink_port_register(dl, dlp, dp->index);
 	if (err) {
 		if (ds->ops->port_teardown)
 			ds->ops->port_teardown(ds, dp->index);
 		return err;
 	}

 	return 0;
 }

 void dsa_port_devlink_teardown(struct dsa_port *dp)
 {
 	struct devlink_port *dlp = &dp->devlink_port;
 	struct dsa_switch *ds = dp->ds;

 	devlink_port_unregister(dlp);

 	if (ds->ops->port_teardown)
 		ds->ops->port_teardown(ds, dp->index);

 	devlink_port_fini(dlp);
 }

 void dsa_switch_devlink_register(struct dsa_switch *ds)
 {
 	devlink_register(ds->devlink);
 }

 void dsa_switch_devlink_unregister(struct dsa_switch *ds)
 {
 	devlink_unregister(ds->devlink);
 }

 int dsa_switch_devlink_alloc(struct dsa_switch *ds)
 {
 	struct dsa_devlink_priv *dl_priv;
 	struct devlink *dl;

 	/* Add the switch to devlink before calling setup, so that setup can
 	 * add dpipe tables
 	 */
 	dl = devlink_alloc(&dsa_devlink_ops, sizeof(*dl_priv), ds->dev);
 	if (!dl)
 		return -ENOMEM;

 	ds->devlink = dl;

 	dl_priv = devlink_priv(ds->devlink);
 	dl_priv->ds = ds;

 	return 0;
 }

 void dsa_switch_devlink_free(struct dsa_switch *ds)
 {
 	devlink_free(ds->devlink);
 	ds->devlink = NULL;
 }
	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* DSA devlink handling
	*/

	#include <net/dsa.h>
	#include <net/devlink.h>

	#include "devlink.h"

	static int dsa_devlink_info_get(struct devlink *dl,
	struct devlink_info_req *req,
	struct netlink_ext_ack *extack)
	{
	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

	if (ds->ops->devlink_info_get)
	return ds->ops->devlink_info_get(ds, req, extack);

	return -EOPNOTSUPP;
	}

	static int dsa_devlink_sb_pool_get(struct devlink *dl,
	unsigned int sb_index, u16 pool_index,
	struct devlink_sb_pool_info *pool_info)
	{
	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

	if (!ds->ops->devlink_sb_pool_get)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_pool_get(ds, sb_index, pool_index,
	pool_info);
	}

	static int dsa_devlink_sb_pool_set(struct devlink *dl, unsigned int sb_index,
	u16 pool_index, u32 size,
	enum devlink_sb_threshold_type threshold_type,
	struct netlink_ext_ack *extack)
	{
	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

	if (!ds->ops->devlink_sb_pool_set)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_pool_set(ds, sb_index, pool_index, size,
	threshold_type, extack);
	}

	static int dsa_devlink_sb_port_pool_get(struct devlink_port *dlp,
	unsigned int sb_index, u16 pool_index,
	u32 *p_threshold)
	{
	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
	int port = dsa_devlink_port_to_port(dlp);

	if (!ds->ops->devlink_sb_port_pool_get)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_port_pool_get(ds, port, sb_index,
	pool_index, p_threshold);
	}

	static int dsa_devlink_sb_port_pool_set(struct devlink_port *dlp,
	unsigned int sb_index, u16 pool_index,
	u32 threshold,
	struct netlink_ext_ack *extack)
	{
	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
	int port = dsa_devlink_port_to_port(dlp);

	if (!ds->ops->devlink_sb_port_pool_set)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_port_pool_set(ds, port, sb_index,
	pool_index, threshold, extack);
	}

	static int
	dsa_devlink_sb_tc_pool_bind_get(struct devlink_port *dlp,
	unsigned int sb_index, u16 tc_index,
	enum devlink_sb_pool_type pool_type,
	u16 p_pool_index, u32 p_threshold)
	{
	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
	int port = dsa_devlink_port_to_port(dlp);

	if (!ds->ops->devlink_sb_tc_pool_bind_get)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_tc_pool_bind_get(ds, port, sb_index,
	tc_index, pool_type,
	p_pool_index, p_threshold);
	}

	static int
	dsa_devlink_sb_tc_pool_bind_set(struct devlink_port *dlp,
	unsigned int sb_index, u16 tc_index,
	enum devlink_sb_pool_type pool_type,
	u16 pool_index, u32 threshold,
	struct netlink_ext_ack *extack)
	{
	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
	int port = dsa_devlink_port_to_port(dlp);

	if (!ds->ops->devlink_sb_tc_pool_bind_set)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_tc_pool_bind_set(ds, port, sb_index,
	tc_index, pool_type,
	pool_index, threshold,
	extack);
	}

	static int dsa_devlink_sb_occ_snapshot(struct devlink *dl,
	unsigned int sb_index)
	{
	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

	if (!ds->ops->devlink_sb_occ_snapshot)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_occ_snapshot(ds, sb_index);
	}

	static int dsa_devlink_sb_occ_max_clear(struct devlink *dl,
	unsigned int sb_index)
	{
	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

	if (!ds->ops->devlink_sb_occ_max_clear)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_occ_max_clear(ds, sb_index);
	}

	static int dsa_devlink_sb_occ_port_pool_get(struct devlink_port *dlp,
	unsigned int sb_index,
	u16 pool_index, u32 *p_cur,
	u32 *p_max)
	{
	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
	int port = dsa_devlink_port_to_port(dlp);

	if (!ds->ops->devlink_sb_occ_port_pool_get)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_occ_port_pool_get(ds, port, sb_index,
	pool_index, p_cur, p_max);
	}

	static int
	dsa_devlink_sb_occ_tc_port_bind_get(struct devlink_port *dlp,
	unsigned int sb_index, u16 tc_index,
	enum devlink_sb_pool_type pool_type,
	u32 p_cur, u32 p_max)
	{
	struct dsa_switch *ds = dsa_devlink_port_to_ds(dlp);
	int port = dsa_devlink_port_to_port(dlp);

	if (!ds->ops->devlink_sb_occ_tc_port_bind_get)
	return -EOPNOTSUPP;

	return ds->ops->devlink_sb_occ_tc_port_bind_get(ds, port,
	sb_index, tc_index,
	pool_type, p_cur,
	p_max);
	}

	static const struct devlink_ops dsa_devlink_ops = {
	.info_get = dsa_devlink_info_get,
	.sb_pool_get = dsa_devlink_sb_pool_get,
	.sb_pool_set = dsa_devlink_sb_pool_set,
	.sb_port_pool_get = dsa_devlink_sb_port_pool_get,
	.sb_port_pool_set = dsa_devlink_sb_port_pool_set,
	.sb_tc_pool_bind_get = dsa_devlink_sb_tc_pool_bind_get,
	.sb_tc_pool_bind_set = dsa_devlink_sb_tc_pool_bind_set,
	.sb_occ_snapshot = dsa_devlink_sb_occ_snapshot,
	.sb_occ_max_clear = dsa_devlink_sb_occ_max_clear,
	.sb_occ_port_pool_get = dsa_devlink_sb_occ_port_pool_get,
	.sb_occ_tc_port_bind_get = dsa_devlink_sb_occ_tc_port_bind_get,
	};

	int dsa_devlink_param_get(struct devlink *dl, u32 id,
	struct devlink_param_gset_ctx *ctx)
	{
	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

	if (!ds->ops->devlink_param_get)
	return -EOPNOTSUPP;

	return ds->ops->devlink_param_get(ds, id, ctx);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_param_get);

	int dsa_devlink_param_set(struct devlink *dl, u32 id,
	struct devlink_param_gset_ctx *ctx,
	struct netlink_ext_ack *extack)
	{
	struct dsa_switch *ds = dsa_devlink_to_ds(dl);

	if (!ds->ops->devlink_param_set)
	return -EOPNOTSUPP;

	return ds->ops->devlink_param_set(ds, id, ctx);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_param_set);

	int dsa_devlink_params_register(struct dsa_switch *ds,
	const struct devlink_param *params,
	size_t params_count)
	{
	return devlink_params_register(ds->devlink, params, params_count);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_params_register);

	void dsa_devlink_params_unregister(struct dsa_switch *ds,
	const struct devlink_param *params,
	size_t params_count)
	{
	devlink_params_unregister(ds->devlink, params, params_count);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_params_unregister);

	int dsa_devlink_resource_register(struct dsa_switch *ds,
	const char *resource_name,
	u64 resource_size,
	u64 resource_id,
	u64 parent_resource_id,
	const struct devlink_resource_size_params *size_params)
	{
	int ret;

	devl_lock(ds->devlink);
	ret = devl_resource_register(ds->devlink, resource_name, resource_size,
	resource_id, parent_resource_id,
	size_params);
	devl_unlock(ds->devlink);

	return ret;
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_resource_register);

	void dsa_devlink_resources_unregister(struct dsa_switch *ds)
	{
	devlink_resources_unregister(ds->devlink);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_resources_unregister);

	void dsa_devlink_resource_occ_get_register(struct dsa_switch *ds,
	u64 resource_id,
	devlink_resource_occ_get_t *occ_get,
	void *occ_get_priv)
	{
	devl_lock(ds->devlink);
	devl_resource_occ_get_register(ds->devlink, resource_id, occ_get,
	occ_get_priv);
	devl_unlock(ds->devlink);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_resource_occ_get_register);

	void dsa_devlink_resource_occ_get_unregister(struct dsa_switch *ds,
	u64 resource_id)
	{
	devl_lock(ds->devlink);
	devl_resource_occ_get_unregister(ds->devlink, resource_id);
	devl_unlock(ds->devlink);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_resource_occ_get_unregister);

	struct devlink_region *
	dsa_devlink_region_create(struct dsa_switch *ds,
	const struct devlink_region_ops *ops,
	u32 region_max_snapshots, u64 region_size)
	{
	return devlink_region_create(ds->devlink, ops, region_max_snapshots,
	region_size);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_region_create);

	struct devlink_region *
	dsa_devlink_port_region_create(struct dsa_switch *ds,
	int port,
	const struct devlink_port_region_ops *ops,
	u32 region_max_snapshots, u64 region_size)
	{
	struct dsa_port *dp = dsa_to_port(ds, port);

	return devlink_port_region_create(&dp->devlink_port, ops,
	region_max_snapshots,
	region_size);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_port_region_create);

	void dsa_devlink_region_destroy(struct devlink_region *region)
	{
	devlink_region_destroy(region);
	}
	EXPORT_SYMBOL_GPL(dsa_devlink_region_destroy);

	int dsa_port_devlink_setup(struct dsa_port *dp)
	{
	struct devlink_port *dlp = &dp->devlink_port;
	struct dsa_switch_tree *dst = dp->ds->dst;
	struct devlink_port_attrs attrs = {};
	struct devlink *dl = dp->ds->devlink;
	struct dsa_switch *ds = dp->ds;
	const unsigned char *id;
	unsigned char len;
	int err;

	memset(dlp, 0, sizeof(*dlp));
	devlink_port_init(dl, dlp);

	if (ds->ops->port_setup) {
	err = ds->ops->port_setup(ds, dp->index);
	if (err)
	return err;
	}

	id = (const unsigned char *)&dst->index;
	len = sizeof(dst->index);

	attrs.phys.port_number = dp->index;
	memcpy(attrs.switch_id.id, id, len);
	attrs.switch_id.id_len = len;

	switch (dp->type) {
	case DSA_PORT_TYPE_UNUSED:
	attrs.flavour = DEVLINK_PORT_FLAVOUR_UNUSED;
	break;
	case DSA_PORT_TYPE_CPU:
	attrs.flavour = DEVLINK_PORT_FLAVOUR_CPU;
	break;
	case DSA_PORT_TYPE_DSA:
	attrs.flavour = DEVLINK_PORT_FLAVOUR_DSA;
	break;
	case DSA_PORT_TYPE_USER:
	attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
	break;
	}

	devlink_port_attrs_set(dlp, &attrs);
	err = devlink_port_register(dl, dlp, dp->index);
	if (err) {
	if (ds->ops->port_teardown)
	ds->ops->port_teardown(ds, dp->index);
	return err;
	}

	return 0;
	}

	void dsa_port_devlink_teardown(struct dsa_port *dp)
	{
	struct devlink_port *dlp = &dp->devlink_port;
	struct dsa_switch *ds = dp->ds;

	devlink_port_unregister(dlp);

	if (ds->ops->port_teardown)
	ds->ops->port_teardown(ds, dp->index);

	devlink_port_fini(dlp);
	}

	void dsa_switch_devlink_register(struct dsa_switch *ds)
	{
	devlink_register(ds->devlink);
	}

	void dsa_switch_devlink_unregister(struct dsa_switch *ds)
	{
	devlink_unregister(ds->devlink);
	}

	int dsa_switch_devlink_alloc(struct dsa_switch *ds)
	{
	struct dsa_devlink_priv *dl_priv;
	struct devlink *dl;

	/* Add the switch to devlink before calling setup, so that setup can
	* add dpipe tables
	*/
	dl = devlink_alloc(&dsa_devlink_ops, sizeof(*dl_priv), ds->dev);
	if (!dl)
	return -ENOMEM;

	ds->devlink = dl;

	dl_priv = devlink_priv(ds->devlink);
	dl_priv->ds = ds;

	return 0;
	}

	void dsa_switch_devlink_free(struct dsa_switch *ds)
	{
	devlink_free(ds->devlink);
	ds->devlink = NULL;
	}