/*
 * Copyright (c) 2019 AVM GmbH <info@avm.de>.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#define pr_fmt(fmt) "offload_dp: " fmt

#include <linux/netdevice.h>
#include <linux/skbuff.h>

#include <offload/datapath.h>
#include <offload/errstat.h>

/* Remember to add descriptions to offdp_rv_names */
enum offdp_rv {
	OFFDP_SUCCESS = 0,

	OFFDP_ERR_BACKEND_INIT,
	OFFDP_ERR_MEM,
	OFFDP_ERR_DEV_RESOLVE,
	OFFDP_ERR_CONFLICT,
	OFFDP_ERR_NETLINK,
	OFFDP_ERR_SWAPI,
	OFFDP_ERR_NOAVAIL,
	OFFDP_ERR_FAST_RCV,
	OFFDP_ERR_VEP_LIMIT,
	OFFDP_ERR_VEP_NOT_VIRTUAL,
	OFFDP_ERR_VEP_EXISTS,
	OFFDP_ERR_KOBJ,
	OFFDP_ERR_INPUT,
};

extern struct errstat_domain *edom;
#define OFFDP_IS_ERR(rv) (errstat_track(edom, (rv)) != OFFDP_SUCCESS)

enum offdp_rv offdp_vep_tracepoint_hook(void);

extern struct kobject *offdp_kobj;

/* Backend-implemented functions */
enum offdp_rv offdp_backend_init(void);
void offdp_backend_exit(void);
enum offdp_rv offdp_backend_bridge_add(const struct net_device *br,
				       struct kobject **kobj);
enum offdp_rv offdp_backend_bridge_port_add(struct net_device *port,
					    struct kobject *br_kobj,
					    struct kobject **kobj);
enum offdp_rv offdp_backend_bridge_port_isolate(struct kobject *kobj,
						bool isolated);
enum offdp_rv offdp_backend_bridge_port_software_fwd(struct kobject *kobj,
						     bool software_fwd);
enum offdp_rv offdp_backend_bridge_port_hairpin(struct kobject *kobj,
						bool hairpin);

enum offdp_rv offdp_backend_vep_add(const struct net_device *dev,
				    unsigned long *vep_handle);
void offdp_backend_vep_remove(unsigned long vep_handle);
enum offdp_rv offdp_backend_vep_fast_rcv(unsigned long vep_handle,
					 struct sk_buff *skb);
enum offdp_rv offdp_backend_vep_fast_rcv_raw(unsigned long vep_handle,
					     void *buf, unsigned long offset,
					     unsigned long len);
enum offdp_rv offdp_backend_ep_platform_data(const struct net_device *dev,
					     const unsigned long *vep_handle,
					     void *data, size_t len);