/*
 * Copyright (c) 2021 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/>.
 */
//TODO: Use that...
enum hwpa_backend_rv {
	HWPA_BACKEND_SUCCESS, /* required */
	HWPA_BACKEND_ERR_INTERNAL,
	HWPA_BACKEND_ERR_TRACKER_LIMIT,
	HWPA_BACKEND_UNSUPPORTED_L4_PROTOCOL,
	HWPA_BACKEND_UNSUPPORTED_SESS_TYPE,
	HWPA_BACKEND_ERR_SUBSYS,
	HWPA_BACKEND_ERR_BAD_NET_DEV,
	HWPA_BACKEND_ERR_MEMORY,
	HWPA_BACKEND_ERR_SESS_CREATE,
	HWPA_BACKEND_ERR_CACHE,
	HWPA_BACKEND_ERR_SESS_REM,
	HWPA_BACKEND_ERR_BAD_HANDLE,
	HWPA_BACKEND_ERR_SYNC,
	HWPA_BACKEND_ERR_NO_NSS,
	HWPA_BACKEND_ERR_INVALID_SYNC,
};

#define HWPA_BACKEND_RV_DESC_INITIALIZER \
{\
	[HWPA_BACKEND_SUCCESS] = "success",\
\
	[HWPA_BACKEND_ERR_INTERNAL] = "internal error",\
	[HWPA_BACKEND_ERR_TRACKER_LIMIT] = "NSS subsystem offloading limit reached",\
	[HWPA_BACKEND_UNSUPPORTED_L4_PROTOCOL] = "unsupported L4 protocol",\
	[HWPA_BACKEND_UNSUPPORTED_SESS_TYPE] = "unsupported session type",\
	[HWPA_BACKEND_ERR_SUBSYS] = "subsystem or offloader could not be obtained",\
	[HWPA_BACKEND_ERR_BAD_NET_DEV] = "bad net_device",\
	[HWPA_BACKEND_ERR_MEMORY] = "memory error",\
	[HWPA_BACKEND_ERR_SESS_CREATE] = "NSS offloading error",\
	[HWPA_BACKEND_ERR_CACHE] = "kmem cache error",\
	[HWPA_BACKEND_ERR_SESS_REM] = "NSS offloading removal error",\
	[HWPA_BACKEND_ERR_BAD_HANDLE] = "bad hwpa handle",\
	[HWPA_BACKEND_ERR_SYNC] = "sync error",\
	[HWPA_BACKEND_ERR_NO_NSS] = "no nss",\
	[HWPA_BACKEND_ERR_INVALID_SYNC] = "sync session not found",\
}

#define HWPA_VALID_L2                                                          \
	{ { .type = AVM_PA_NUM_MATCH_TYPES } },                                \
                                                                               \
	{ { .type = AVM_PA_ETH }, { .type = AVM_PA_NUM_MATCH_TYPES } },        \
                                                                               \
	{ { .type = AVM_PA_ETH },                                              \
	  { .type = AVM_PA_VLAN },                                             \
	  { .type = AVM_PA_NUM_MATCH_TYPES } },                                \
	                                                                       \
	{ { .type = AVM_PA_ETH },                                              \
	  { .type = AVM_PA_PPPOE },                                            \
	  { .type = AVM_PA_PPP },                                              \
	  { .type = AVM_PA_NUM_MATCH_TYPES } },                                \
	                                                                       \
	{ { .type = AVM_PA_ETH },                                              \
	  { .type = AVM_PA_VLAN },                                             \
	  { .type = AVM_PA_PPPOE },                                            \
	  { .type = AVM_PA_PPP },                                              \
	  { .type = AVM_PA_NUM_MATCH_TYPES } },                                \


#define HWPA_VALID_L3                                                          \
	{ { .type = AVM_PA_IPV4 },                                             \
	  { .type = AVM_PA_PORTS },                                            \
	  { .type = AVM_PA_NUM_MATCH_TYPES }, },                               \
	                                                                       \
	{ { .type = AVM_PA_IPV6 },                                             \
	  { .type = AVM_PA_PORTS },                                            \
	  { .type = AVM_PA_NUM_MATCH_TYPES }, },                               \


/* No encapsulation yet */
#define HWPA_VALID_L3_L2ENCAP
#define HWPA_VALID_L3_L3ENCAP

int alloc_rx_channel(avm_pid_handle pid_handle);
int alloc_tx_channel(avm_pid_handle pid_handle);
int free_rx_channel(avm_pid_handle pid_handle);
int free_tx_channel(avm_pid_handle pid_handle);
int try_to_accelerate(avm_pid_handle pid_handle,
                                            struct sk_buff *skb);