/*
 * This file is part of the Chelsio T4/T5/T6 Ethernet driver for Linux.
 *
 * Copyright (c) 2017 Chelsio Communications, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef __CXGB4_TC_FLOWER_H
#define __CXGB4_TC_FLOWER_H

#include <net/pkt_cls.h>

struct ch_tc_flower_stats {
        u64 prev_packet_count;
        u64 packet_count;
        u64 byte_count;
        u64 last_used;
};

struct ch_tc_flower_entry {
        struct ch_filter_specification fs;
        struct ch_tc_flower_stats stats;
        unsigned long tc_flower_cookie;
        struct rhash_head node;
        struct rcu_head rcu;
        spinlock_t lock; /* lock for stats */
        u32 filter_id;
};

enum {
        ETH_DMAC_31_0,  /* dmac bits 0.. 31 */
        ETH_DMAC_47_32, /* dmac bits 32..47 */
        ETH_SMAC_15_0,  /* smac bits 0.. 15 */
        ETH_SMAC_47_16, /* smac bits 16..47 */

        IP4_SRC,        /* 32-bit IPv4 src  */
        IP4_DST,        /* 32-bit IPv4 dst  */

        IP6_SRC_31_0,   /* src bits 0..  31 */
        IP6_SRC_63_32,  /* src bits 63.. 32 */
        IP6_SRC_95_64,  /* src bits 95.. 64 */
        IP6_SRC_127_96, /* src bits 127..96 */

        IP6_DST_31_0,   /* dst bits 0..  31 */
        IP6_DST_63_32,  /* dst bits 63.. 32 */
        IP6_DST_95_64,  /* dst bits 95.. 64 */
        IP6_DST_127_96, /* dst bits 127..96 */

        TCP_SPORT,      /* 16-bit TCP sport */
        TCP_DPORT,      /* 16-bit TCP dport */

        UDP_SPORT,      /* 16-bit UDP sport */
        UDP_DPORT,      /* 16-bit UDP dport */
};

struct ch_tc_pedit_fields {
        u8 field;
        u8 size;
        u32 offset;
};

#define PEDIT_FIELDS(type, field, size, fs_field, offset) \
        { type## field, size, \
                offsetof(struct ch_filter_specification, fs_field) + (offset) }

#define PEDIT_ETH_DMAC_MASK             0xffff
#define PEDIT_TCP_UDP_SPORT_MASK        0xffff
#define PEDIT_ETH_DMAC_31_0             0x0
#define PEDIT_ETH_DMAC_47_32_SMAC_15_0  0x4
#define PEDIT_ETH_SMAC_47_16            0x8
#define PEDIT_IP4_SRC                   0xC
#define PEDIT_IP4_DST                   0x10
#define PEDIT_IP6_SRC_31_0              0x8
#define PEDIT_IP6_SRC_63_32             0xC
#define PEDIT_IP6_SRC_95_64             0x10
#define PEDIT_IP6_SRC_127_96            0x14
#define PEDIT_IP6_DST_31_0              0x18
#define PEDIT_IP6_DST_63_32             0x1C
#define PEDIT_IP6_DST_95_64             0x20
#define PEDIT_IP6_DST_127_96            0x24
#define PEDIT_TCP_SPORT_DPORT           0x0
#define PEDIT_UDP_SPORT_DPORT           0x0

enum cxgb4_action_natmode_flags {
        CXGB4_ACTION_NATMODE_NONE = 0,
        CXGB4_ACTION_NATMODE_DIP = (1 << 0),
        CXGB4_ACTION_NATMODE_SIP = (1 << 1),
        CXGB4_ACTION_NATMODE_DPORT = (1 << 2),
        CXGB4_ACTION_NATMODE_SPORT = (1 << 3),
};

/* TC PEDIT action to NATMODE translation entry */
struct cxgb4_natmode_config {
        enum chip_type chip;
        u8 flags;
        u8 natmode;
};

void cxgb4_process_flow_actions(struct net_device *in,
                                struct flow_action *actions,
                                struct ch_filter_specification *fs);
int cxgb4_validate_flow_actions(struct net_device *dev,
                                struct flow_action *actions,
                                struct netlink_ext_ack *extack,
                                u8 matchall_filter);

int cxgb4_tc_flower_replace(struct net_device *dev,
                            struct flow_cls_offload *cls);
int cxgb4_tc_flower_destroy(struct net_device *dev,
                            struct flow_cls_offload *cls);
int cxgb4_tc_flower_stats(struct net_device *dev,
                          struct flow_cls_offload *cls);
int cxgb4_flow_rule_replace(struct net_device *dev, struct flow_rule *rule,
                            u32 tc_prio, struct netlink_ext_ack *extack,
                            struct ch_filter_specification *fs, u32 *tid);
int cxgb4_flow_rule_destroy(struct net_device *dev, u32 tc_prio,
                            struct ch_filter_specification *fs, int tid);

int cxgb4_init_tc_flower(struct adapter *adap);
void cxgb4_cleanup_tc_flower(struct adapter *adap);
#endif /* __CXGB4_TC_FLOWER_H */