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/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
/* Copyright (c) 2019-2021 Marvell International Ltd. All rights reserved. */
#ifndef _PRESTERA_ROUTER_HW_H_
#define _PRESTERA_ROUTER_HW_H_
struct prestera_vr {
struct list_head router_node;
refcount_t refcount;
u32 tb_id; /* key (kernel fib table id) */
u16 hw_vr_id; /* virtual router ID */
u8 __pad[2];
};
struct prestera_rif_entry {
struct prestera_rif_entry_key {
struct prestera_iface iface;
} key;
struct prestera_vr *vr;
unsigned char addr[ETH_ALEN];
u16 hw_id; /* rif_id */
struct list_head router_node; /* ht */
};
struct prestera_ip_addr {
union {
__be32 ipv4;
struct in6_addr ipv6;
} u;
enum {
PRESTERA_IPV4 = 0,
PRESTERA_IPV6
} v;
#define PRESTERA_IP_ADDR_PLEN(V) ((V) == PRESTERA_IPV4 ? 32 : \
/* (V) == PRESTERA_IPV6 ? */ 128 /* : 0 */)
};
struct prestera_nh_neigh_key {
struct prestera_ip_addr addr;
/* Seems like rif is obsolete, because there is iface in info ?
* Key can contain functional fields, or fields, which is used to
* filter duplicate objects on logical level (before you pass it to
* HW)... also key can be used to cover hardware restrictions.
* In our case rif - is logical interface (even can be VLAN), which
* is used in combination with IP address (which is also not related to
* hardware nexthop) to provide logical compression of created nexthops.
* You even can imagine, that rif+IPaddr is just cookie.
*/
/* struct prestera_rif *rif; */
/* Use just as cookie, to divide ARP domains (in order with addr) */
void *rif;
};
/* Used for hw call */
struct prestera_neigh_info {
struct prestera_iface iface;
unsigned char ha[ETH_ALEN];
u8 connected; /* bool. indicate, if mac/oif valid */
u8 __pad[1];
};
/* Used to notify nh about neigh change */
struct prestera_nh_neigh {
struct prestera_nh_neigh_key key;
struct prestera_neigh_info info;
struct rhash_head ht_node; /* node of prestera_vr */
struct list_head nexthop_group_list;
};
#define PRESTERA_NHGR_SIZE_MAX 4
struct prestera_nexthop_group {
struct prestera_nexthop_group_key {
struct prestera_nh_neigh_key neigh[PRESTERA_NHGR_SIZE_MAX];
} key;
/* Store intermediate object here.
* This prevent overhead kzalloc call.
*/
/* nh_neigh is used only to notify nexthop_group */
struct prestera_nh_neigh_head {
struct prestera_nexthop_group *this;
struct list_head head;
/* ptr to neigh is not necessary.
* It used to prevent lookup of nh_neigh by key (n) on destroy
*/
struct prestera_nh_neigh *neigh;
} nh_neigh_head[PRESTERA_NHGR_SIZE_MAX];
struct rhash_head ht_node; /* node of prestera_vr */
refcount_t refcount;
u32 grp_id; /* hw */
};
struct prestera_fib_key {
struct prestera_ip_addr addr;
u32 prefix_len;
u32 tb_id;
};
struct prestera_fib_info {
struct prestera_vr *vr;
struct list_head vr_node;
enum prestera_fib_type {
PRESTERA_FIB_TYPE_INVALID = 0,
/* must be pointer to nh_grp id */
PRESTERA_FIB_TYPE_UC_NH,
/* It can be connected route
* and will be overlapped with neighbours
*/
PRESTERA_FIB_TYPE_TRAP,
PRESTERA_FIB_TYPE_DROP
} type;
/* Valid only if type = UC_NH*/
struct prestera_nexthop_group *nh_grp;
};
struct prestera_fib_node {
struct rhash_head ht_node; /* node of prestera_vr */
struct prestera_fib_key key;
struct prestera_fib_info info; /* action related info */
};
struct prestera_rif_entry *
prestera_rif_entry_find(const struct prestera_switch *sw,
const struct prestera_rif_entry_key *k);
void prestera_rif_entry_destroy(struct prestera_switch *sw,
struct prestera_rif_entry *e);
struct prestera_rif_entry *
prestera_rif_entry_create(struct prestera_switch *sw,
struct prestera_rif_entry_key *k,
u32 tb_id, const unsigned char *addr);
struct prestera_nh_neigh *
prestera_nh_neigh_find(struct prestera_switch *sw,
struct prestera_nh_neigh_key *key);
struct prestera_nh_neigh *
prestera_nh_neigh_get(struct prestera_switch *sw,
struct prestera_nh_neigh_key *key);
void prestera_nh_neigh_put(struct prestera_switch *sw,
struct prestera_nh_neigh *neigh);
int prestera_nh_neigh_set(struct prestera_switch *sw,
struct prestera_nh_neigh *neigh);
bool prestera_nh_neigh_util_hw_state(struct prestera_switch *sw,
struct prestera_nh_neigh *nh_neigh);
struct prestera_fib_node *prestera_fib_node_find(struct prestera_switch *sw,
struct prestera_fib_key *key);
void prestera_fib_node_destroy(struct prestera_switch *sw,
struct prestera_fib_node *fib_node);
struct prestera_fib_node *
prestera_fib_node_create(struct prestera_switch *sw,
struct prestera_fib_key *key,
enum prestera_fib_type fib_type,
struct prestera_nexthop_group_key *nh_grp_key);
int prestera_router_hw_init(struct prestera_switch *sw);
void prestera_router_hw_fini(struct prestera_switch *sw);
#endif /* _PRESTERA_ROUTER_HW_H_ */
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