blob: 4b2e0fd7d51e0a6635cdea75055eec9365d21588 [file] [log] [blame]
/*
* drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
* Copyright (c) 2016 Ido Schimmel <idosch@mellanox.com>
* Copyright (c) 2016 Yotam Gigi <yotamg@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/rhashtable.h>
#include <linux/bitops.h>
#include <linux/in6.h>
#include <linux/notifier.h>
#include <linux/inetdevice.h>
#include <linux/netdevice.h>
#include <linux/if_bridge.h>
#include <net/netevent.h>
#include <net/neighbour.h>
#include <net/arp.h>
#include <net/ip_fib.h>
#include <net/fib_rules.h>
#include <net/l3mdev.h>
#include "spectrum.h"
#include "core.h"
#include "reg.h"
#include "spectrum_cnt.h"
#include "spectrum_dpipe.h"
#include "spectrum_router.h"
struct mlxsw_sp_vr;
struct mlxsw_sp_lpm_tree;
struct mlxsw_sp_rif_ops;
struct mlxsw_sp_router {
struct mlxsw_sp *mlxsw_sp;
struct mlxsw_sp_rif **rifs;
struct mlxsw_sp_vr *vrs;
struct rhashtable neigh_ht;
struct rhashtable nexthop_group_ht;
struct rhashtable nexthop_ht;
struct {
struct mlxsw_sp_lpm_tree *trees;
unsigned int tree_count;
} lpm;
struct {
struct delayed_work dw;
unsigned long interval; /* ms */
} neighs_update;
struct delayed_work nexthop_probe_dw;
#define MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL 5000 /* ms */
struct list_head nexthop_neighs_list;
bool aborted;
struct notifier_block fib_nb;
const struct mlxsw_sp_rif_ops **rif_ops_arr;
};
struct mlxsw_sp_rif {
struct list_head nexthop_list;
struct list_head neigh_list;
struct net_device *dev;
struct mlxsw_sp_fid *fid;
unsigned char addr[ETH_ALEN];
int mtu;
u16 rif_index;
u16 vr_id;
const struct mlxsw_sp_rif_ops *ops;
struct mlxsw_sp *mlxsw_sp;
unsigned int counter_ingress;
bool counter_ingress_valid;
unsigned int counter_egress;
bool counter_egress_valid;
};
struct mlxsw_sp_rif_params {
struct net_device *dev;
union {
u16 system_port;
u16 lag_id;
};
u16 vid;
bool lag;
};
struct mlxsw_sp_rif_subport {
struct mlxsw_sp_rif common;
union {
u16 system_port;
u16 lag_id;
};
u16 vid;
bool lag;
};
struct mlxsw_sp_rif_ops {
enum mlxsw_sp_rif_type type;
size_t rif_size;
void (*setup)(struct mlxsw_sp_rif *rif,
const struct mlxsw_sp_rif_params *params);
int (*configure)(struct mlxsw_sp_rif *rif);
void (*deconfigure)(struct mlxsw_sp_rif *rif);
struct mlxsw_sp_fid * (*fid_get)(struct mlxsw_sp_rif *rif);
};
static unsigned int *
mlxsw_sp_rif_p_counter_get(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
return &rif->counter_egress;
case MLXSW_SP_RIF_COUNTER_INGRESS:
return &rif->counter_ingress;
}
return NULL;
}
static bool
mlxsw_sp_rif_counter_valid_get(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
return rif->counter_egress_valid;
case MLXSW_SP_RIF_COUNTER_INGRESS:
return rif->counter_ingress_valid;
}
return false;
}
static void
mlxsw_sp_rif_counter_valid_set(struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir,
bool valid)
{
switch (dir) {
case MLXSW_SP_RIF_COUNTER_EGRESS:
rif->counter_egress_valid = valid;
break;
case MLXSW_SP_RIF_COUNTER_INGRESS:
rif->counter_ingress_valid = valid;
break;
}
}
static int mlxsw_sp_rif_counter_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
unsigned int counter_index, bool enable,
enum mlxsw_sp_rif_counter_dir dir)
{
char ritr_pl[MLXSW_REG_RITR_LEN];
bool is_egress = false;
int err;
if (dir == MLXSW_SP_RIF_COUNTER_EGRESS)
is_egress = true;
mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
if (err)
return err;
mlxsw_reg_ritr_counter_pack(ritr_pl, counter_index, enable,
is_egress);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir, u64 *cnt)
{
char ricnt_pl[MLXSW_REG_RICNT_LEN];
unsigned int *p_counter_index;
bool valid;
int err;
valid = mlxsw_sp_rif_counter_valid_get(rif, dir);
if (!valid)
return -EINVAL;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (!p_counter_index)
return -EINVAL;
mlxsw_reg_ricnt_pack(ricnt_pl, *p_counter_index,
MLXSW_REG_RICNT_OPCODE_NOP);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl);
if (err)
return err;
*cnt = mlxsw_reg_ricnt_good_unicast_packets_get(ricnt_pl);
return 0;
}
static int mlxsw_sp_rif_counter_clear(struct mlxsw_sp *mlxsw_sp,
unsigned int counter_index)
{
char ricnt_pl[MLXSW_REG_RICNT_LEN];
mlxsw_reg_ricnt_pack(ricnt_pl, counter_index,
MLXSW_REG_RICNT_OPCODE_CLEAR);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ricnt), ricnt_pl);
}
int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
unsigned int *p_counter_index;
int err;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (!p_counter_index)
return -EINVAL;
err = mlxsw_sp_counter_alloc(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
p_counter_index);
if (err)
return err;
err = mlxsw_sp_rif_counter_clear(mlxsw_sp, *p_counter_index);
if (err)
goto err_counter_clear;
err = mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index,
*p_counter_index, true, dir);
if (err)
goto err_counter_edit;
mlxsw_sp_rif_counter_valid_set(rif, dir, true);
return 0;
err_counter_edit:
err_counter_clear:
mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
*p_counter_index);
return err;
}
void mlxsw_sp_rif_counter_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif,
enum mlxsw_sp_rif_counter_dir dir)
{
unsigned int *p_counter_index;
if (!mlxsw_sp_rif_counter_valid_get(rif, dir))
return;
p_counter_index = mlxsw_sp_rif_p_counter_get(rif, dir);
if (WARN_ON(!p_counter_index))
return;
mlxsw_sp_rif_counter_edit(mlxsw_sp, rif->rif_index,
*p_counter_index, false, dir);
mlxsw_sp_counter_free(mlxsw_sp, MLXSW_SP_COUNTER_SUB_POOL_RIF,
*p_counter_index);
mlxsw_sp_rif_counter_valid_set(rif, dir, false);
}
static void mlxsw_sp_rif_counters_alloc(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct devlink *devlink;
devlink = priv_to_devlink(mlxsw_sp->core);
if (!devlink_dpipe_table_counter_enabled(devlink,
MLXSW_SP_DPIPE_TABLE_NAME_ERIF))
return;
mlxsw_sp_rif_counter_alloc(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS);
}
static void mlxsw_sp_rif_counters_free(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
mlxsw_sp_rif_counter_free(mlxsw_sp, rif, MLXSW_SP_RIF_COUNTER_EGRESS);
}
static struct mlxsw_sp_rif *
mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev);
#define MLXSW_SP_PREFIX_COUNT (sizeof(struct in6_addr) * BITS_PER_BYTE)
struct mlxsw_sp_prefix_usage {
DECLARE_BITMAP(b, MLXSW_SP_PREFIX_COUNT);
};
#define mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) \
for_each_set_bit(prefix, (prefix_usage)->b, MLXSW_SP_PREFIX_COUNT)
static bool
mlxsw_sp_prefix_usage_subset(struct mlxsw_sp_prefix_usage *prefix_usage1,
struct mlxsw_sp_prefix_usage *prefix_usage2)
{
unsigned char prefix;
mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage1) {
if (!test_bit(prefix, prefix_usage2->b))
return false;
}
return true;
}
static bool
mlxsw_sp_prefix_usage_eq(struct mlxsw_sp_prefix_usage *prefix_usage1,
struct mlxsw_sp_prefix_usage *prefix_usage2)
{
return !memcmp(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1));
}
static bool
mlxsw_sp_prefix_usage_none(struct mlxsw_sp_prefix_usage *prefix_usage)
{
struct mlxsw_sp_prefix_usage prefix_usage_none = {{ 0 } };
return mlxsw_sp_prefix_usage_eq(prefix_usage, &prefix_usage_none);
}
static void
mlxsw_sp_prefix_usage_cpy(struct mlxsw_sp_prefix_usage *prefix_usage1,
struct mlxsw_sp_prefix_usage *prefix_usage2)
{
memcpy(prefix_usage1, prefix_usage2, sizeof(*prefix_usage1));
}
static void
mlxsw_sp_prefix_usage_set(struct mlxsw_sp_prefix_usage *prefix_usage,
unsigned char prefix_len)
{
set_bit(prefix_len, prefix_usage->b);
}
static void
mlxsw_sp_prefix_usage_clear(struct mlxsw_sp_prefix_usage *prefix_usage,
unsigned char prefix_len)
{
clear_bit(prefix_len, prefix_usage->b);
}
struct mlxsw_sp_fib_key {
unsigned char addr[sizeof(struct in6_addr)];
unsigned char prefix_len;
};
enum mlxsw_sp_fib_entry_type {
MLXSW_SP_FIB_ENTRY_TYPE_REMOTE,
MLXSW_SP_FIB_ENTRY_TYPE_LOCAL,
MLXSW_SP_FIB_ENTRY_TYPE_TRAP,
};
struct mlxsw_sp_nexthop_group;
struct mlxsw_sp_fib;
struct mlxsw_sp_fib_node {
struct list_head entry_list;
struct list_head list;
struct rhash_head ht_node;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_fib_key key;
};
struct mlxsw_sp_fib_entry_params {
u32 tb_id;
u32 prio;
u8 tos;
u8 type;
};
struct mlxsw_sp_fib_entry {
struct list_head list;
struct mlxsw_sp_fib_node *fib_node;
enum mlxsw_sp_fib_entry_type type;
struct list_head nexthop_group_node;
struct mlxsw_sp_nexthop_group *nh_group;
struct mlxsw_sp_fib_entry_params params;
bool offloaded;
};
enum mlxsw_sp_l3proto {
MLXSW_SP_L3_PROTO_IPV4,
MLXSW_SP_L3_PROTO_IPV6,
};
struct mlxsw_sp_lpm_tree {
u8 id; /* tree ID */
unsigned int ref_count;
enum mlxsw_sp_l3proto proto;
struct mlxsw_sp_prefix_usage prefix_usage;
};
struct mlxsw_sp_fib {
struct rhashtable ht;
struct list_head node_list;
struct mlxsw_sp_vr *vr;
struct mlxsw_sp_lpm_tree *lpm_tree;
unsigned long prefix_ref_count[MLXSW_SP_PREFIX_COUNT];
struct mlxsw_sp_prefix_usage prefix_usage;
enum mlxsw_sp_l3proto proto;
};
struct mlxsw_sp_vr {
u16 id; /* virtual router ID */
u32 tb_id; /* kernel fib table id */
unsigned int rif_count;
struct mlxsw_sp_fib *fib4;
};
static const struct rhashtable_params mlxsw_sp_fib_ht_params;
static struct mlxsw_sp_fib *mlxsw_sp_fib_create(struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_fib *fib;
int err;
fib = kzalloc(sizeof(*fib), GFP_KERNEL);
if (!fib)
return ERR_PTR(-ENOMEM);
err = rhashtable_init(&fib->ht, &mlxsw_sp_fib_ht_params);
if (err)
goto err_rhashtable_init;
INIT_LIST_HEAD(&fib->node_list);
fib->proto = proto;
fib->vr = vr;
return fib;
err_rhashtable_init:
kfree(fib);
return ERR_PTR(err);
}
static void mlxsw_sp_fib_destroy(struct mlxsw_sp_fib *fib)
{
WARN_ON(!list_empty(&fib->node_list));
WARN_ON(fib->lpm_tree);
rhashtable_destroy(&fib->ht);
kfree(fib);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_find_unused(struct mlxsw_sp *mlxsw_sp)
{
static struct mlxsw_sp_lpm_tree *lpm_tree;
int i;
for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) {
lpm_tree = &mlxsw_sp->router->lpm.trees[i];
if (lpm_tree->ref_count == 0)
return lpm_tree;
}
return NULL;
}
static int mlxsw_sp_lpm_tree_alloc(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char ralta_pl[MLXSW_REG_RALTA_LEN];
mlxsw_reg_ralta_pack(ralta_pl, true,
(enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
lpm_tree->id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl);
}
static int mlxsw_sp_lpm_tree_free(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char ralta_pl[MLXSW_REG_RALTA_LEN];
mlxsw_reg_ralta_pack(ralta_pl, false,
(enum mlxsw_reg_ralxx_protocol) lpm_tree->proto,
lpm_tree->id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl);
}
static int
mlxsw_sp_lpm_tree_left_struct_set(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_prefix_usage *prefix_usage,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
char ralst_pl[MLXSW_REG_RALST_LEN];
u8 root_bin = 0;
u8 prefix;
u8 last_prefix = MLXSW_REG_RALST_BIN_NO_CHILD;
mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage)
root_bin = prefix;
mlxsw_reg_ralst_pack(ralst_pl, root_bin, lpm_tree->id);
mlxsw_sp_prefix_usage_for_each(prefix, prefix_usage) {
if (prefix == 0)
continue;
mlxsw_reg_ralst_bin_pack(ralst_pl, prefix, last_prefix,
MLXSW_REG_RALST_BIN_NO_CHILD);
last_prefix = prefix;
}
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_prefix_usage *prefix_usage,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
int err;
lpm_tree = mlxsw_sp_lpm_tree_find_unused(mlxsw_sp);
if (!lpm_tree)
return ERR_PTR(-EBUSY);
lpm_tree->proto = proto;
err = mlxsw_sp_lpm_tree_alloc(mlxsw_sp, lpm_tree);
if (err)
return ERR_PTR(err);
err = mlxsw_sp_lpm_tree_left_struct_set(mlxsw_sp, prefix_usage,
lpm_tree);
if (err)
goto err_left_struct_set;
memcpy(&lpm_tree->prefix_usage, prefix_usage,
sizeof(lpm_tree->prefix_usage));
return lpm_tree;
err_left_struct_set:
mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree);
return ERR_PTR(err);
}
static int mlxsw_sp_lpm_tree_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
return mlxsw_sp_lpm_tree_free(mlxsw_sp, lpm_tree);
}
static struct mlxsw_sp_lpm_tree *
mlxsw_sp_lpm_tree_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_prefix_usage *prefix_usage,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
int i;
for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) {
lpm_tree = &mlxsw_sp->router->lpm.trees[i];
if (lpm_tree->ref_count != 0 &&
lpm_tree->proto == proto &&
mlxsw_sp_prefix_usage_eq(&lpm_tree->prefix_usage,
prefix_usage))
goto inc_ref_count;
}
lpm_tree = mlxsw_sp_lpm_tree_create(mlxsw_sp, prefix_usage,
proto);
if (IS_ERR(lpm_tree))
return lpm_tree;
inc_ref_count:
lpm_tree->ref_count++;
return lpm_tree;
}
static int mlxsw_sp_lpm_tree_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_lpm_tree *lpm_tree)
{
if (--lpm_tree->ref_count == 0)
return mlxsw_sp_lpm_tree_destroy(mlxsw_sp, lpm_tree);
return 0;
}
#define MLXSW_SP_LPM_TREE_MIN 1 /* tree 0 is reserved */
static int mlxsw_sp_lpm_init(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_lpm_tree *lpm_tree;
u64 max_trees;
int i;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_LPM_TREES))
return -EIO;
max_trees = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_LPM_TREES);
mlxsw_sp->router->lpm.tree_count = max_trees - MLXSW_SP_LPM_TREE_MIN;
mlxsw_sp->router->lpm.trees = kcalloc(mlxsw_sp->router->lpm.tree_count,
sizeof(struct mlxsw_sp_lpm_tree),
GFP_KERNEL);
if (!mlxsw_sp->router->lpm.trees)
return -ENOMEM;
for (i = 0; i < mlxsw_sp->router->lpm.tree_count; i++) {
lpm_tree = &mlxsw_sp->router->lpm.trees[i];
lpm_tree->id = i + MLXSW_SP_LPM_TREE_MIN;
}
return 0;
}
static void mlxsw_sp_lpm_fini(struct mlxsw_sp *mlxsw_sp)
{
kfree(mlxsw_sp->router->lpm.trees);
}
static bool mlxsw_sp_vr_is_used(const struct mlxsw_sp_vr *vr)
{
return !!vr->fib4;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_find_unused(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_vr *vr;
int i;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
vr = &mlxsw_sp->router->vrs[i];
if (!mlxsw_sp_vr_is_used(vr))
return vr;
}
return NULL;
}
static int mlxsw_sp_vr_lpm_tree_bind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib)
{
char raltb_pl[MLXSW_REG_RALTB_LEN];
mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id,
(enum mlxsw_reg_ralxx_protocol) fib->proto,
fib->lpm_tree->id);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl);
}
static int mlxsw_sp_vr_lpm_tree_unbind(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib)
{
char raltb_pl[MLXSW_REG_RALTB_LEN];
/* Bind to tree 0 which is default */
mlxsw_reg_raltb_pack(raltb_pl, fib->vr->id,
(enum mlxsw_reg_ralxx_protocol) fib->proto, 0);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb), raltb_pl);
}
static u32 mlxsw_sp_fix_tb_id(u32 tb_id)
{
/* For our purpose, squash main and local table into one */
if (tb_id == RT_TABLE_LOCAL)
tb_id = RT_TABLE_MAIN;
return tb_id;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_find(struct mlxsw_sp *mlxsw_sp,
u32 tb_id)
{
struct mlxsw_sp_vr *vr;
int i;
tb_id = mlxsw_sp_fix_tb_id(tb_id);
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
vr = &mlxsw_sp->router->vrs[i];
if (mlxsw_sp_vr_is_used(vr) && vr->tb_id == tb_id)
return vr;
}
return NULL;
}
static struct mlxsw_sp_fib *mlxsw_sp_vr_fib(const struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto)
{
switch (proto) {
case MLXSW_SP_L3_PROTO_IPV4:
return vr->fib4;
case MLXSW_SP_L3_PROTO_IPV6:
BUG_ON(1);
}
return NULL;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_create(struct mlxsw_sp *mlxsw_sp,
u32 tb_id)
{
struct mlxsw_sp_vr *vr;
vr = mlxsw_sp_vr_find_unused(mlxsw_sp);
if (!vr)
return ERR_PTR(-EBUSY);
vr->fib4 = mlxsw_sp_fib_create(vr, MLXSW_SP_L3_PROTO_IPV4);
if (IS_ERR(vr->fib4))
return ERR_CAST(vr->fib4);
vr->tb_id = tb_id;
return vr;
}
static void mlxsw_sp_vr_destroy(struct mlxsw_sp_vr *vr)
{
mlxsw_sp_fib_destroy(vr->fib4);
vr->fib4 = NULL;
}
static int
mlxsw_sp_vr_lpm_tree_check(struct mlxsw_sp *mlxsw_sp, struct mlxsw_sp_fib *fib,
struct mlxsw_sp_prefix_usage *req_prefix_usage)
{
struct mlxsw_sp_lpm_tree *lpm_tree = fib->lpm_tree;
struct mlxsw_sp_lpm_tree *new_tree;
int err;
if (mlxsw_sp_prefix_usage_eq(req_prefix_usage, &lpm_tree->prefix_usage))
return 0;
new_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, req_prefix_usage,
fib->proto);
if (IS_ERR(new_tree)) {
/* We failed to get a tree according to the required
* prefix usage. However, the current tree might be still good
* for us if our requirement is subset of the prefixes used
* in the tree.
*/
if (mlxsw_sp_prefix_usage_subset(req_prefix_usage,
&lpm_tree->prefix_usage))
return 0;
return PTR_ERR(new_tree);
}
/* Prevent packet loss by overwriting existing binding */
fib->lpm_tree = new_tree;
err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib);
if (err)
goto err_tree_bind;
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
return 0;
err_tree_bind:
fib->lpm_tree = lpm_tree;
mlxsw_sp_lpm_tree_put(mlxsw_sp, new_tree);
return err;
}
static struct mlxsw_sp_vr *mlxsw_sp_vr_get(struct mlxsw_sp *mlxsw_sp, u32 tb_id)
{
struct mlxsw_sp_vr *vr;
tb_id = mlxsw_sp_fix_tb_id(tb_id);
vr = mlxsw_sp_vr_find(mlxsw_sp, tb_id);
if (!vr)
vr = mlxsw_sp_vr_create(mlxsw_sp, tb_id);
return vr;
}
static void mlxsw_sp_vr_put(struct mlxsw_sp_vr *vr)
{
if (!vr->rif_count && list_empty(&vr->fib4->node_list))
mlxsw_sp_vr_destroy(vr);
}
static int mlxsw_sp_vrs_init(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_vr *vr;
u64 max_vrs;
int i;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_VRS))
return -EIO;
max_vrs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS);
mlxsw_sp->router->vrs = kcalloc(max_vrs, sizeof(struct mlxsw_sp_vr),
GFP_KERNEL);
if (!mlxsw_sp->router->vrs)
return -ENOMEM;
for (i = 0; i < max_vrs; i++) {
vr = &mlxsw_sp->router->vrs[i];
vr->id = i;
}
return 0;
}
static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp);
static void mlxsw_sp_vrs_fini(struct mlxsw_sp *mlxsw_sp)
{
/* At this stage we're guaranteed not to have new incoming
* FIB notifications and the work queue is free from FIBs
* sitting on top of mlxsw netdevs. However, we can still
* have other FIBs queued. Flush the queue before flushing
* the device's tables. No need for locks, as we're the only
* writer.
*/
mlxsw_core_flush_owq();
mlxsw_sp_router_fib_flush(mlxsw_sp);
kfree(mlxsw_sp->router->vrs);
}
struct mlxsw_sp_neigh_key {
struct neighbour *n;
};
struct mlxsw_sp_neigh_entry {
struct list_head rif_list_node;
struct rhash_head ht_node;
struct mlxsw_sp_neigh_key key;
u16 rif;
bool connected;
unsigned char ha[ETH_ALEN];
struct list_head nexthop_list; /* list of nexthops using
* this neigh entry
*/
struct list_head nexthop_neighs_list_node;
};
static const struct rhashtable_params mlxsw_sp_neigh_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_neigh_entry, key),
.head_offset = offsetof(struct mlxsw_sp_neigh_entry, ht_node),
.key_len = sizeof(struct mlxsw_sp_neigh_key),
};
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_alloc(struct mlxsw_sp *mlxsw_sp, struct neighbour *n,
u16 rif)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
neigh_entry = kzalloc(sizeof(*neigh_entry), GFP_KERNEL);
if (!neigh_entry)
return NULL;
neigh_entry->key.n = n;
neigh_entry->rif = rif;
INIT_LIST_HEAD(&neigh_entry->nexthop_list);
return neigh_entry;
}
static void mlxsw_sp_neigh_entry_free(struct mlxsw_sp_neigh_entry *neigh_entry)
{
kfree(neigh_entry);
}
static int
mlxsw_sp_neigh_entry_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
return rhashtable_insert_fast(&mlxsw_sp->router->neigh_ht,
&neigh_entry->ht_node,
mlxsw_sp_neigh_ht_params);
}
static void
mlxsw_sp_neigh_entry_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
rhashtable_remove_fast(&mlxsw_sp->router->neigh_ht,
&neigh_entry->ht_node,
mlxsw_sp_neigh_ht_params);
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_create(struct mlxsw_sp *mlxsw_sp, struct neighbour *n)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct mlxsw_sp_rif *rif;
int err;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, n->dev);
if (!rif)
return ERR_PTR(-EINVAL);
neigh_entry = mlxsw_sp_neigh_entry_alloc(mlxsw_sp, n, rif->rif_index);
if (!neigh_entry)
return ERR_PTR(-ENOMEM);
err = mlxsw_sp_neigh_entry_insert(mlxsw_sp, neigh_entry);
if (err)
goto err_neigh_entry_insert;
list_add(&neigh_entry->rif_list_node, &rif->neigh_list);
return neigh_entry;
err_neigh_entry_insert:
mlxsw_sp_neigh_entry_free(neigh_entry);
return ERR_PTR(err);
}
static void
mlxsw_sp_neigh_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry)
{
list_del(&neigh_entry->rif_list_node);
mlxsw_sp_neigh_entry_remove(mlxsw_sp, neigh_entry);
mlxsw_sp_neigh_entry_free(neigh_entry);
}
static struct mlxsw_sp_neigh_entry *
mlxsw_sp_neigh_entry_lookup(struct mlxsw_sp *mlxsw_sp, struct neighbour *n)
{
struct mlxsw_sp_neigh_key key;
key.n = n;
return rhashtable_lookup_fast(&mlxsw_sp->router->neigh_ht,
&key, mlxsw_sp_neigh_ht_params);
}
static void
mlxsw_sp_router_neighs_update_interval_init(struct mlxsw_sp *mlxsw_sp)
{
unsigned long interval = NEIGH_VAR(&arp_tbl.parms, DELAY_PROBE_TIME);
mlxsw_sp->router->neighs_update.interval = jiffies_to_msecs(interval);
}
static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int ent_index)
{
struct net_device *dev;
struct neighbour *n;
__be32 dipn;
u32 dip;
u16 rif;
mlxsw_reg_rauhtd_ent_ipv4_unpack(rauhtd_pl, ent_index, &rif, &dip);
if (!mlxsw_sp->router->rifs[rif]) {
dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect RIF in neighbour entry\n");
return;
}
dipn = htonl(dip);
dev = mlxsw_sp->router->rifs[rif]->dev;
n = neigh_lookup(&arp_tbl, &dipn, dev);
if (!n) {
netdev_err(dev, "Failed to find matching neighbour for IP=%pI4h\n",
&dip);
return;
}
netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip);
neigh_event_send(n, NULL);
neigh_release(n);
}
static void mlxsw_sp_router_neigh_rec_ipv4_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl,
int rec_index)
{
u8 num_entries;
int i;
num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl,
rec_index);
/* Hardware starts counting at 0, so add 1. */
num_entries++;
/* Each record consists of several neighbour entries. */
for (i = 0; i < num_entries; i++) {
int ent_index;
ent_index = rec_index * MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC + i;
mlxsw_sp_router_neigh_ent_ipv4_process(mlxsw_sp, rauhtd_pl,
ent_index);
}
}
static void mlxsw_sp_router_neigh_rec_process(struct mlxsw_sp *mlxsw_sp,
char *rauhtd_pl, int rec_index)
{
switch (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, rec_index)) {
case MLXSW_REG_RAUHTD_TYPE_IPV4:
mlxsw_sp_router_neigh_rec_ipv4_process(mlxsw_sp, rauhtd_pl,
rec_index);
break;
case MLXSW_REG_RAUHTD_TYPE_IPV6:
WARN_ON_ONCE(1);
break;
}
}
static bool mlxsw_sp_router_rauhtd_is_full(char *rauhtd_pl)
{
u8 num_rec, last_rec_index, num_entries;
num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl);
last_rec_index = num_rec - 1;
if (num_rec < MLXSW_REG_RAUHTD_REC_MAX_NUM)
return false;
if (mlxsw_reg_rauhtd_rec_type_get(rauhtd_pl, last_rec_index) ==
MLXSW_REG_RAUHTD_TYPE_IPV6)
return true;
num_entries = mlxsw_reg_rauhtd_ipv4_rec_num_entries_get(rauhtd_pl,
last_rec_index);
if (++num_entries == MLXSW_REG_RAUHTD_IPV4_ENT_PER_REC)
return true;
return false;
}
static int mlxsw_sp_router_neighs_update_rauhtd(struct mlxsw_sp *mlxsw_sp)
{
char *rauhtd_pl;
u8 num_rec;
int i, err;
rauhtd_pl = kmalloc(MLXSW_REG_RAUHTD_LEN, GFP_KERNEL);
if (!rauhtd_pl)
return -ENOMEM;
/* Make sure the neighbour's netdev isn't removed in the
* process.
*/
rtnl_lock();
do {
mlxsw_reg_rauhtd_pack(rauhtd_pl, MLXSW_REG_RAUHTD_TYPE_IPV4);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(rauhtd),
rauhtd_pl);
if (err) {
dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Failed to dump neighbour talbe\n");
break;
}
num_rec = mlxsw_reg_rauhtd_num_rec_get(rauhtd_pl);
for (i = 0; i < num_rec; i++)
mlxsw_sp_router_neigh_rec_process(mlxsw_sp, rauhtd_pl,
i);
} while (mlxsw_sp_router_rauhtd_is_full(rauhtd_pl));
rtnl_unlock();
kfree(rauhtd_pl);
return err;
}
static void mlxsw_sp_router_neighs_update_nh(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
/* Take RTNL mutex here to prevent lists from changes */
rtnl_lock();
list_for_each_entry(neigh_entry, &mlxsw_sp->router->nexthop_neighs_list,
nexthop_neighs_list_node)
/* If this neigh have nexthops, make the kernel think this neigh
* is active regardless of the traffic.
*/
neigh_event_send(neigh_entry->key.n, NULL);
rtnl_unlock();
}
static void
mlxsw_sp_router_neighs_update_work_schedule(struct mlxsw_sp *mlxsw_sp)
{
unsigned long interval = mlxsw_sp->router->neighs_update.interval;
mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw,
msecs_to_jiffies(interval));
}
static void mlxsw_sp_router_neighs_update_work(struct work_struct *work)
{
struct mlxsw_sp_router *router;
int err;
router = container_of(work, struct mlxsw_sp_router,
neighs_update.dw.work);
err = mlxsw_sp_router_neighs_update_rauhtd(router->mlxsw_sp);
if (err)
dev_err(router->mlxsw_sp->bus_info->dev, "Could not update kernel for neigh activity");
mlxsw_sp_router_neighs_update_nh(router->mlxsw_sp);
mlxsw_sp_router_neighs_update_work_schedule(router->mlxsw_sp);
}
static void mlxsw_sp_router_probe_unresolved_nexthops(struct work_struct *work)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct mlxsw_sp_router *router;
router = container_of(work, struct mlxsw_sp_router,
nexthop_probe_dw.work);
/* Iterate over nexthop neighbours, find those who are unresolved and
* send arp on them. This solves the chicken-egg problem when
* the nexthop wouldn't get offloaded until the neighbor is resolved
* but it wouldn't get resolved ever in case traffic is flowing in HW
* using different nexthop.
*
* Take RTNL mutex here to prevent lists from changes.
*/
rtnl_lock();
list_for_each_entry(neigh_entry, &router->nexthop_neighs_list,
nexthop_neighs_list_node)
if (!neigh_entry->connected)
neigh_event_send(neigh_entry->key.n, NULL);
rtnl_unlock();
mlxsw_core_schedule_dw(&router->nexthop_probe_dw,
MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL);
}
static void
mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool removing);
static enum mlxsw_reg_rauht_op mlxsw_sp_rauht_op(bool adding)
{
return adding ? MLXSW_REG_RAUHT_OP_WRITE_ADD :
MLXSW_REG_RAUHT_OP_WRITE_DELETE;
}
static void
mlxsw_sp_router_neigh_entry_op4(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
enum mlxsw_reg_rauht_op op)
{
struct neighbour *n = neigh_entry->key.n;
u32 dip = ntohl(*((__be32 *) n->primary_key));
char rauht_pl[MLXSW_REG_RAUHT_LEN];
mlxsw_reg_rauht_pack4(rauht_pl, op, neigh_entry->rif, neigh_entry->ha,
dip);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl);
}
static void
mlxsw_sp_neigh_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool adding)
{
if (!adding && !neigh_entry->connected)
return;
neigh_entry->connected = adding;
if (neigh_entry->key.n->tbl == &arp_tbl)
mlxsw_sp_router_neigh_entry_op4(mlxsw_sp, neigh_entry,
mlxsw_sp_rauht_op(adding));
else
WARN_ON_ONCE(1);
}
struct mlxsw_sp_neigh_event_work {
struct work_struct work;
struct mlxsw_sp *mlxsw_sp;
struct neighbour *n;
};
static void mlxsw_sp_router_neigh_event_work(struct work_struct *work)
{
struct mlxsw_sp_neigh_event_work *neigh_work =
container_of(work, struct mlxsw_sp_neigh_event_work, work);
struct mlxsw_sp *mlxsw_sp = neigh_work->mlxsw_sp;
struct mlxsw_sp_neigh_entry *neigh_entry;
struct neighbour *n = neigh_work->n;
unsigned char ha[ETH_ALEN];
bool entry_connected;
u8 nud_state, dead;
/* If these parameters are changed after we release the lock,
* then we are guaranteed to receive another event letting us
* know about it.
*/
read_lock_bh(&n->lock);
memcpy(ha, n->ha, ETH_ALEN);
nud_state = n->nud_state;
dead = n->dead;
read_unlock_bh(&n->lock);
rtnl_lock();
entry_connected = nud_state & NUD_VALID && !dead;
neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n);
if (!entry_connected && !neigh_entry)
goto out;
if (!neigh_entry) {
neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n);
if (IS_ERR(neigh_entry))
goto out;
}
memcpy(neigh_entry->ha, ha, ETH_ALEN);
mlxsw_sp_neigh_entry_update(mlxsw_sp, neigh_entry, entry_connected);
mlxsw_sp_nexthop_neigh_update(mlxsw_sp, neigh_entry, !entry_connected);
if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list))
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
out:
rtnl_unlock();
neigh_release(n);
kfree(neigh_work);
}
int mlxsw_sp_router_netevent_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct mlxsw_sp_neigh_event_work *neigh_work;
struct mlxsw_sp_port *mlxsw_sp_port;
struct mlxsw_sp *mlxsw_sp;
unsigned long interval;
struct neigh_parms *p;
struct neighbour *n;
switch (event) {
case NETEVENT_DELAY_PROBE_TIME_UPDATE:
p = ptr;
/* We don't care about changes in the default table. */
if (!p->dev || p->tbl != &arp_tbl)
return NOTIFY_DONE;
/* We are in atomic context and can't take RTNL mutex,
* so use RCU variant to walk the device chain.
*/
mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(p->dev);
if (!mlxsw_sp_port)
return NOTIFY_DONE;
mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
interval = jiffies_to_msecs(NEIGH_VAR(p, DELAY_PROBE_TIME));
mlxsw_sp->router->neighs_update.interval = interval;
mlxsw_sp_port_dev_put(mlxsw_sp_port);
break;
case NETEVENT_NEIGH_UPDATE:
n = ptr;
if (n->tbl != &arp_tbl)
return NOTIFY_DONE;
mlxsw_sp_port = mlxsw_sp_port_lower_dev_hold(n->dev);
if (!mlxsw_sp_port)
return NOTIFY_DONE;
neigh_work = kzalloc(sizeof(*neigh_work), GFP_ATOMIC);
if (!neigh_work) {
mlxsw_sp_port_dev_put(mlxsw_sp_port);
return NOTIFY_BAD;
}
INIT_WORK(&neigh_work->work, mlxsw_sp_router_neigh_event_work);
neigh_work->mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
neigh_work->n = n;
/* Take a reference to ensure the neighbour won't be
* destructed until we drop the reference in delayed
* work.
*/
neigh_clone(n);
mlxsw_core_schedule_work(&neigh_work->work);
mlxsw_sp_port_dev_put(mlxsw_sp_port);
break;
}
return NOTIFY_DONE;
}
static int mlxsw_sp_neigh_init(struct mlxsw_sp *mlxsw_sp)
{
int err;
err = rhashtable_init(&mlxsw_sp->router->neigh_ht,
&mlxsw_sp_neigh_ht_params);
if (err)
return err;
/* Initialize the polling interval according to the default
* table.
*/
mlxsw_sp_router_neighs_update_interval_init(mlxsw_sp);
/* Create the delayed works for the activity_update */
INIT_DELAYED_WORK(&mlxsw_sp->router->neighs_update.dw,
mlxsw_sp_router_neighs_update_work);
INIT_DELAYED_WORK(&mlxsw_sp->router->nexthop_probe_dw,
mlxsw_sp_router_probe_unresolved_nexthops);
mlxsw_core_schedule_dw(&mlxsw_sp->router->neighs_update.dw, 0);
mlxsw_core_schedule_dw(&mlxsw_sp->router->nexthop_probe_dw, 0);
return 0;
}
static void mlxsw_sp_neigh_fini(struct mlxsw_sp *mlxsw_sp)
{
cancel_delayed_work_sync(&mlxsw_sp->router->neighs_update.dw);
cancel_delayed_work_sync(&mlxsw_sp->router->nexthop_probe_dw);
rhashtable_destroy(&mlxsw_sp->router->neigh_ht);
}
static int mlxsw_sp_neigh_rif_flush(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_rif *rif)
{
char rauht_pl[MLXSW_REG_RAUHT_LEN];
mlxsw_reg_rauht_pack(rauht_pl, MLXSW_REG_RAUHT_OP_WRITE_DELETE_ALL,
rif->rif_index, rif->addr);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rauht), rauht_pl);
}
static void mlxsw_sp_neigh_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_neigh_entry *neigh_entry, *tmp;
mlxsw_sp_neigh_rif_flush(mlxsw_sp, rif);
list_for_each_entry_safe(neigh_entry, tmp, &rif->neigh_list,
rif_list_node)
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
}
struct mlxsw_sp_nexthop_key {
struct fib_nh *fib_nh;
};
struct mlxsw_sp_nexthop {
struct list_head neigh_list_node; /* member of neigh entry list */
struct list_head rif_list_node;
struct mlxsw_sp_nexthop_group *nh_grp; /* pointer back to the group
* this belongs to
*/
struct rhash_head ht_node;
struct mlxsw_sp_nexthop_key key;
struct mlxsw_sp_rif *rif;
u8 should_offload:1, /* set indicates this neigh is connected and
* should be put to KVD linear area of this group.
*/
offloaded:1, /* set in case the neigh is actually put into
* KVD linear area of this group.
*/
update:1; /* set indicates that MAC of this neigh should be
* updated in HW
*/
struct mlxsw_sp_neigh_entry *neigh_entry;
};
struct mlxsw_sp_nexthop_group_key {
struct fib_info *fi;
};
struct mlxsw_sp_nexthop_group {
struct rhash_head ht_node;
struct list_head fib_list; /* list of fib entries that use this group */
struct mlxsw_sp_nexthop_group_key key;
u8 adj_index_valid:1,
gateway:1; /* routes using the group use a gateway */
u32 adj_index;
u16 ecmp_size;
u16 count;
struct mlxsw_sp_nexthop nexthops[0];
#define nh_rif nexthops[0].rif
};
static const struct rhashtable_params mlxsw_sp_nexthop_group_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_nexthop_group, key),
.head_offset = offsetof(struct mlxsw_sp_nexthop_group, ht_node),
.key_len = sizeof(struct mlxsw_sp_nexthop_group_key),
};
static int mlxsw_sp_nexthop_group_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_group_ht,
&nh_grp->ht_node,
mlxsw_sp_nexthop_group_ht_params);
}
static void mlxsw_sp_nexthop_group_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
rhashtable_remove_fast(&mlxsw_sp->router->nexthop_group_ht,
&nh_grp->ht_node,
mlxsw_sp_nexthop_group_ht_params);
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop_group_lookup(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group_key key)
{
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_group_ht, &key,
mlxsw_sp_nexthop_group_ht_params);
}
static const struct rhashtable_params mlxsw_sp_nexthop_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_nexthop, key),
.head_offset = offsetof(struct mlxsw_sp_nexthop, ht_node),
.key_len = sizeof(struct mlxsw_sp_nexthop_key),
};
static int mlxsw_sp_nexthop_insert(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
return rhashtable_insert_fast(&mlxsw_sp->router->nexthop_ht,
&nh->ht_node, mlxsw_sp_nexthop_ht_params);
}
static void mlxsw_sp_nexthop_remove(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
rhashtable_remove_fast(&mlxsw_sp->router->nexthop_ht, &nh->ht_node,
mlxsw_sp_nexthop_ht_params);
}
static struct mlxsw_sp_nexthop *
mlxsw_sp_nexthop_lookup(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_key key)
{
return rhashtable_lookup_fast(&mlxsw_sp->router->nexthop_ht, &key,
mlxsw_sp_nexthop_ht_params);
}
static int mlxsw_sp_adj_index_mass_update_vr(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib *fib,
u32 adj_index, u16 ecmp_size,
u32 new_adj_index,
u16 new_ecmp_size)
{
char raleu_pl[MLXSW_REG_RALEU_LEN];
mlxsw_reg_raleu_pack(raleu_pl,
(enum mlxsw_reg_ralxx_protocol) fib->proto,
fib->vr->id, adj_index, ecmp_size, new_adj_index,
new_ecmp_size);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raleu), raleu_pl);
}
static int mlxsw_sp_adj_index_mass_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
u32 old_adj_index, u16 old_ecmp_size)
{
struct mlxsw_sp_fib_entry *fib_entry;
struct mlxsw_sp_fib *fib = NULL;
int err;
list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) {
if (fib == fib_entry->fib_node->fib)
continue;
fib = fib_entry->fib_node->fib;
err = mlxsw_sp_adj_index_mass_update_vr(mlxsw_sp, fib,
old_adj_index,
old_ecmp_size,
nh_grp->adj_index,
nh_grp->ecmp_size);
if (err)
return err;
}
return 0;
}
static int mlxsw_sp_nexthop_mac_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry;
char ratr_pl[MLXSW_REG_RATR_LEN];
mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY,
true, adj_index, neigh_entry->rif);
mlxsw_reg_ratr_eth_entry_pack(ratr_pl, neigh_entry->ha);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl);
}
static int
mlxsw_sp_nexthop_group_mac_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
bool reallocate)
{
u32 adj_index = nh_grp->adj_index; /* base */
struct mlxsw_sp_nexthop *nh;
int i;
int err;
for (i = 0; i < nh_grp->count; i++) {
nh = &nh_grp->nexthops[i];
if (!nh->should_offload) {
nh->offloaded = 0;
continue;
}
if (nh->update || reallocate) {
err = mlxsw_sp_nexthop_mac_update(mlxsw_sp,
adj_index, nh);
if (err)
return err;
nh->update = 0;
nh->offloaded = 1;
}
adj_index++;
}
return 0;
}
static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry);
static bool
mlxsw_sp_fib_node_entry_is_first(const struct mlxsw_sp_fib_node *fib_node,
const struct mlxsw_sp_fib_entry *fib_entry);
static int
mlxsw_sp_nexthop_fib_entries_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_fib_entry *fib_entry;
int err;
list_for_each_entry(fib_entry, &nh_grp->fib_list, nexthop_group_node) {
if (!mlxsw_sp_fib_node_entry_is_first(fib_entry->fib_node,
fib_entry))
continue;
err = mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
if (err)
return err;
}
return 0;
}
static void
mlxsw_sp_nexthop_group_refresh(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop *nh;
bool offload_change = false;
u32 adj_index;
u16 ecmp_size = 0;
bool old_adj_index_valid;
u32 old_adj_index;
u16 old_ecmp_size;
int i;
int err;
if (!nh_grp->gateway) {
mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp);
return;
}
for (i = 0; i < nh_grp->count; i++) {
nh = &nh_grp->nexthops[i];
if (nh->should_offload ^ nh->offloaded) {
offload_change = true;
if (nh->should_offload)
nh->update = 1;
}
if (nh->should_offload)
ecmp_size++;
}
if (!offload_change) {
/* Nothing was added or removed, so no need to reallocate. Just
* update MAC on existing adjacency indexes.
*/
err = mlxsw_sp_nexthop_group_mac_update(mlxsw_sp, nh_grp,
false);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n");
goto set_trap;
}
return;
}
if (!ecmp_size)
/* No neigh of this group is connected so we just set
* the trap and let everthing flow through kernel.
*/
goto set_trap;
err = mlxsw_sp_kvdl_alloc(mlxsw_sp, ecmp_size, &adj_index);
if (err) {
/* We ran out of KVD linear space, just set the
* trap and let everything flow through kernel.
*/
dev_warn(mlxsw_sp->bus_info->dev, "Failed to allocate KVD linear area for nexthop group.\n");
goto set_trap;
}
old_adj_index_valid = nh_grp->adj_index_valid;
old_adj_index = nh_grp->adj_index;
old_ecmp_size = nh_grp->ecmp_size;
nh_grp->adj_index_valid = 1;
nh_grp->adj_index = adj_index;
nh_grp->ecmp_size = ecmp_size;
err = mlxsw_sp_nexthop_group_mac_update(mlxsw_sp, nh_grp, true);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to update neigh MAC in adjacency table.\n");
goto set_trap;
}
if (!old_adj_index_valid) {
/* The trap was set for fib entries, so we have to call
* fib entry update to unset it and use adjacency index.
*/
err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to add adjacency index to fib entries.\n");
goto set_trap;
}
return;
}
err = mlxsw_sp_adj_index_mass_update(mlxsw_sp, nh_grp,
old_adj_index, old_ecmp_size);
mlxsw_sp_kvdl_free(mlxsw_sp, old_adj_index);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to mass-update adjacency index for nexthop group.\n");
goto set_trap;
}
return;
set_trap:
old_adj_index_valid = nh_grp->adj_index_valid;
nh_grp->adj_index_valid = 0;
for (i = 0; i < nh_grp->count; i++) {
nh = &nh_grp->nexthops[i];
nh->offloaded = 0;
}
err = mlxsw_sp_nexthop_fib_entries_update(mlxsw_sp, nh_grp);
if (err)
dev_warn(mlxsw_sp->bus_info->dev, "Failed to set traps for fib entries.\n");
if (old_adj_index_valid)
mlxsw_sp_kvdl_free(mlxsw_sp, nh_grp->adj_index);
}
static void __mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp_nexthop *nh,
bool removing)
{
if (!removing && !nh->should_offload)
nh->should_offload = 1;
else if (removing && nh->offloaded)
nh->should_offload = 0;
nh->update = 1;
}
static void
mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_neigh_entry *neigh_entry,
bool removing)
{
struct mlxsw_sp_nexthop *nh;
list_for_each_entry(nh, &neigh_entry->nexthop_list,
neigh_list_node) {
__mlxsw_sp_nexthop_neigh_update(nh, removing);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp);
}
}
static void mlxsw_sp_nexthop_rif_init(struct mlxsw_sp_nexthop *nh,
struct mlxsw_sp_rif *rif)
{
if (nh->rif)
return;
nh->rif = rif;
list_add(&nh->rif_list_node, &rif->nexthop_list);
}
static void mlxsw_sp_nexthop_rif_fini(struct mlxsw_sp_nexthop *nh)
{
if (!nh->rif)
return;
list_del(&nh->rif_list_node);
nh->rif = NULL;
}
static int mlxsw_sp_nexthop_neigh_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_neigh_entry *neigh_entry;
struct fib_nh *fib_nh = nh->key.fib_nh;
struct neighbour *n;
u8 nud_state, dead;
int err;
if (!nh->nh_grp->gateway || nh->neigh_entry)
return 0;
/* Take a reference of neigh here ensuring that neigh would
* not be detructed before the nexthop entry is finished.
* The reference is taken either in neigh_lookup() or
* in neigh_create() in case n is not found.
*/
n = neigh_lookup(&arp_tbl, &fib_nh->nh_gw, fib_nh->nh_dev);
if (!n) {
n = neigh_create(&arp_tbl, &fib_nh->nh_gw, fib_nh->nh_dev);
if (IS_ERR(n))
return PTR_ERR(n);
neigh_event_send(n, NULL);
}
neigh_entry = mlxsw_sp_neigh_entry_lookup(mlxsw_sp, n);
if (!neigh_entry) {
neigh_entry = mlxsw_sp_neigh_entry_create(mlxsw_sp, n);
if (IS_ERR(neigh_entry)) {
err = -EINVAL;
goto err_neigh_entry_create;
}
}
/* If that is the first nexthop connected to that neigh, add to
* nexthop_neighs_list
*/
if (list_empty(&neigh_entry->nexthop_list))
list_add_tail(&neigh_entry->nexthop_neighs_list_node,
&mlxsw_sp->router->nexthop_neighs_list);
nh->neigh_entry = neigh_entry;
list_add_tail(&nh->neigh_list_node, &neigh_entry->nexthop_list);
read_lock_bh(&n->lock);
nud_state = n->nud_state;
dead = n->dead;
read_unlock_bh(&n->lock);
__mlxsw_sp_nexthop_neigh_update(nh, !(nud_state & NUD_VALID && !dead));
return 0;
err_neigh_entry_create:
neigh_release(n);
return err;
}
static void mlxsw_sp_nexthop_neigh_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry;
struct neighbour *n;
if (!neigh_entry)
return;
n = neigh_entry->key.n;
__mlxsw_sp_nexthop_neigh_update(nh, true);
list_del(&nh->neigh_list_node);
nh->neigh_entry = NULL;
/* If that is the last nexthop connected to that neigh, remove from
* nexthop_neighs_list
*/
if (list_empty(&neigh_entry->nexthop_list))
list_del(&neigh_entry->nexthop_neighs_list_node);
if (!neigh_entry->connected && list_empty(&neigh_entry->nexthop_list))
mlxsw_sp_neigh_entry_destroy(mlxsw_sp, neigh_entry);
neigh_release(n);
}
static int mlxsw_sp_nexthop_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp,
struct mlxsw_sp_nexthop *nh,
struct fib_nh *fib_nh)
{
struct net_device *dev = fib_nh->nh_dev;
struct in_device *in_dev;
struct mlxsw_sp_rif *rif;
int err;
nh->nh_grp = nh_grp;
nh->key.fib_nh = fib_nh;
err = mlxsw_sp_nexthop_insert(mlxsw_sp, nh);
if (err)
return err;
if (!dev)
return 0;
in_dev = __in_dev_get_rtnl(dev);
if (in_dev && IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) &&
fib_nh->nh_flags & RTNH_F_LINKDOWN)
return 0;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!rif)
return 0;
mlxsw_sp_nexthop_rif_init(nh, rif);
err = mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh);
if (err)
goto err_nexthop_neigh_init;
return 0;
err_nexthop_neigh_init:
mlxsw_sp_nexthop_rif_fini(nh);
mlxsw_sp_nexthop_remove(mlxsw_sp, nh);
return err;
}
static void mlxsw_sp_nexthop_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop *nh)
{
mlxsw_sp_nexthop_neigh_fini(mlxsw_sp, nh);
mlxsw_sp_nexthop_rif_fini(nh);
mlxsw_sp_nexthop_remove(mlxsw_sp, nh);
}
static void mlxsw_sp_nexthop_event(struct mlxsw_sp *mlxsw_sp,
unsigned long event, struct fib_nh *fib_nh)
{
struct mlxsw_sp_nexthop_key key;
struct mlxsw_sp_nexthop *nh;
struct mlxsw_sp_rif *rif;
if (mlxsw_sp->router->aborted)
return;
key.fib_nh = fib_nh;
nh = mlxsw_sp_nexthop_lookup(mlxsw_sp, key);
if (WARN_ON_ONCE(!nh))
return;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, fib_nh->nh_dev);
if (!rif)
return;
switch (event) {
case FIB_EVENT_NH_ADD:
mlxsw_sp_nexthop_rif_init(nh, rif);
mlxsw_sp_nexthop_neigh_init(mlxsw_sp, nh);
break;
case FIB_EVENT_NH_DEL:
mlxsw_sp_nexthop_neigh_fini(mlxsw_sp, nh);
mlxsw_sp_nexthop_rif_fini(nh);
break;
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp);
}
static void mlxsw_sp_nexthop_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp_nexthop *nh, *tmp;
list_for_each_entry_safe(nh, tmp, &rif->nexthop_list, rif_list_node) {
mlxsw_sp_nexthop_neigh_fini(mlxsw_sp, nh);
mlxsw_sp_nexthop_rif_fini(nh);
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh->nh_grp);
}
}
static struct mlxsw_sp_nexthop_group *
mlxsw_sp_nexthop_group_create(struct mlxsw_sp *mlxsw_sp, struct fib_info *fi)
{
struct mlxsw_sp_nexthop_group *nh_grp;
struct mlxsw_sp_nexthop *nh;
struct fib_nh *fib_nh;
size_t alloc_size;
int i;
int err;
alloc_size = sizeof(*nh_grp) +
fi->fib_nhs * sizeof(struct mlxsw_sp_nexthop);
nh_grp = kzalloc(alloc_size, GFP_KERNEL);
if (!nh_grp)
return ERR_PTR(-ENOMEM);
INIT_LIST_HEAD(&nh_grp->fib_list);
nh_grp->gateway = fi->fib_nh->nh_scope == RT_SCOPE_LINK;
nh_grp->count = fi->fib_nhs;
nh_grp->key.fi = fi;
fib_info_hold(fi);
for (i = 0; i < nh_grp->count; i++) {
nh = &nh_grp->nexthops[i];
fib_nh = &fi->fib_nh[i];
err = mlxsw_sp_nexthop_init(mlxsw_sp, nh_grp, nh, fib_nh);
if (err)
goto err_nexthop_init;
}
err = mlxsw_sp_nexthop_group_insert(mlxsw_sp, nh_grp);
if (err)
goto err_nexthop_group_insert;
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
return nh_grp;
err_nexthop_group_insert:
err_nexthop_init:
for (i--; i >= 0; i--) {
nh = &nh_grp->nexthops[i];
mlxsw_sp_nexthop_fini(mlxsw_sp, nh);
}
fib_info_put(nh_grp->key.fi);
kfree(nh_grp);
return ERR_PTR(err);
}
static void
mlxsw_sp_nexthop_group_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_nexthop_group *nh_grp)
{
struct mlxsw_sp_nexthop *nh;
int i;
mlxsw_sp_nexthop_group_remove(mlxsw_sp, nh_grp);
for (i = 0; i < nh_grp->count; i++) {
nh = &nh_grp->nexthops[i];
mlxsw_sp_nexthop_fini(mlxsw_sp, nh);
}
mlxsw_sp_nexthop_group_refresh(mlxsw_sp, nh_grp);
WARN_ON_ONCE(nh_grp->adj_index_valid);
fib_info_put(nh_grp->key.fi);
kfree(nh_grp);
}
static int mlxsw_sp_nexthop_group_get(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
struct fib_info *fi)
{
struct mlxsw_sp_nexthop_group_key key;
struct mlxsw_sp_nexthop_group *nh_grp;
key.fi = fi;
nh_grp = mlxsw_sp_nexthop_group_lookup(mlxsw_sp, key);
if (!nh_grp) {
nh_grp = mlxsw_sp_nexthop_group_create(mlxsw_sp, fi);
if (IS_ERR(nh_grp))
return PTR_ERR(nh_grp);
}
list_add_tail(&fib_entry->nexthop_group_node, &nh_grp->fib_list);
fib_entry->nh_group = nh_grp;
return 0;
}
static void mlxsw_sp_nexthop_group_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group *nh_grp = fib_entry->nh_group;
list_del(&fib_entry->nexthop_group_node);
if (!list_empty(&nh_grp->fib_list))
return;
mlxsw_sp_nexthop_group_destroy(mlxsw_sp, nh_grp);
}
static bool
mlxsw_sp_fib_entry_should_offload(const struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_nexthop_group *nh_group = fib_entry->nh_group;
if (fib_entry->params.tos)
return false;
switch (fib_entry->type) {
case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE:
return !!nh_group->adj_index_valid;
case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL:
return !!nh_group->nh_rif;
default:
return false;
}
}
static void mlxsw_sp_fib_entry_offload_set(struct mlxsw_sp_fib_entry *fib_entry)
{
fib_entry->offloaded = true;
switch (fib_entry->fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
fib_info_offload_inc(fib_entry->nh_group->key.fi);
break;
case MLXSW_SP_L3_PROTO_IPV6:
WARN_ON_ONCE(1);
}
}
static void
mlxsw_sp_fib_entry_offload_unset(struct mlxsw_sp_fib_entry *fib_entry)
{
switch (fib_entry->fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
fib_info_offload_dec(fib_entry->nh_group->key.fi);
break;
case MLXSW_SP_L3_PROTO_IPV6:
WARN_ON_ONCE(1);
}
fib_entry->offloaded = false;
}
static void
mlxsw_sp_fib_entry_offload_refresh(struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op, int err)
{
switch (op) {
case MLXSW_REG_RALUE_OP_WRITE_DELETE:
if (!fib_entry->offloaded)
return;
return mlxsw_sp_fib_entry_offload_unset(fib_entry);
case MLXSW_REG_RALUE_OP_WRITE_WRITE:
if (err)
return;
if (mlxsw_sp_fib_entry_should_offload(fib_entry) &&
!fib_entry->offloaded)
mlxsw_sp_fib_entry_offload_set(fib_entry);
else if (!mlxsw_sp_fib_entry_should_offload(fib_entry) &&
fib_entry->offloaded)
mlxsw_sp_fib_entry_offload_unset(fib_entry);
return;
default:
return;
}
}
static int mlxsw_sp_fib_entry_op4_remote(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
char ralue_pl[MLXSW_REG_RALUE_LEN];
struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib;
u32 *p_dip = (u32 *) fib_entry->fib_node->key.addr;
enum mlxsw_reg_ralue_trap_action trap_action;
u16 trap_id = 0;
u32 adjacency_index = 0;
u16 ecmp_size = 0;
/* In case the nexthop group adjacency index is valid, use it
* with provided ECMP size. Otherwise, setup trap and pass
* traffic to kernel.
*/
if (mlxsw_sp_fib_entry_should_offload(fib_entry)) {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP;
adjacency_index = fib_entry->nh_group->adj_index;
ecmp_size = fib_entry->nh_group->ecmp_size;
} else {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP;
trap_id = MLXSW_TRAP_ID_RTR_INGRESS0;
}
mlxsw_reg_ralue_pack4(ralue_pl,
(enum mlxsw_reg_ralxx_protocol) fib->proto, op,
fib->vr->id, fib_entry->fib_node->key.prefix_len,
*p_dip);
mlxsw_reg_ralue_act_remote_pack(ralue_pl, trap_action, trap_id,
adjacency_index, ecmp_size);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int mlxsw_sp_fib_entry_op4_local(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
struct mlxsw_sp_rif *rif = fib_entry->nh_group->nh_rif;
struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib;
enum mlxsw_reg_ralue_trap_action trap_action;
char ralue_pl[MLXSW_REG_RALUE_LEN];
u32 *p_dip = (u32 *) fib_entry->fib_node->key.addr;
u16 trap_id = 0;
u16 rif_index = 0;
if (mlxsw_sp_fib_entry_should_offload(fib_entry)) {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_NOP;
rif_index = rif->rif_index;
} else {
trap_action = MLXSW_REG_RALUE_TRAP_ACTION_TRAP;
trap_id = MLXSW_TRAP_ID_RTR_INGRESS0;
}
mlxsw_reg_ralue_pack4(ralue_pl,
(enum mlxsw_reg_ralxx_protocol) fib->proto, op,
fib->vr->id, fib_entry->fib_node->key.prefix_len,
*p_dip);
mlxsw_reg_ralue_act_local_pack(ralue_pl, trap_action, trap_id,
rif_index);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int mlxsw_sp_fib_entry_op4_trap(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
struct mlxsw_sp_fib *fib = fib_entry->fib_node->fib;
char ralue_pl[MLXSW_REG_RALUE_LEN];
u32 *p_dip = (u32 *) fib_entry->fib_node->key.addr;
mlxsw_reg_ralue_pack4(ralue_pl,
(enum mlxsw_reg_ralxx_protocol) fib->proto, op,
fib->vr->id, fib_entry->fib_node->key.prefix_len,
*p_dip);
mlxsw_reg_ralue_act_ip2me_pack(ralue_pl);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue), ralue_pl);
}
static int mlxsw_sp_fib_entry_op4(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
switch (fib_entry->type) {
case MLXSW_SP_FIB_ENTRY_TYPE_REMOTE:
return mlxsw_sp_fib_entry_op4_remote(mlxsw_sp, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_LOCAL:
return mlxsw_sp_fib_entry_op4_local(mlxsw_sp, fib_entry, op);
case MLXSW_SP_FIB_ENTRY_TYPE_TRAP:
return mlxsw_sp_fib_entry_op4_trap(mlxsw_sp, fib_entry, op);
}
return -EINVAL;
}
static int mlxsw_sp_fib_entry_op(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
enum mlxsw_reg_ralue_op op)
{
int err = -EINVAL;
switch (fib_entry->fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
err = mlxsw_sp_fib_entry_op4(mlxsw_sp, fib_entry, op);
break;
case MLXSW_SP_L3_PROTO_IPV6:
return err;
}
mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, err);
return err;
}
static int mlxsw_sp_fib_entry_update(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry,
MLXSW_REG_RALUE_OP_WRITE_WRITE);
}
static int mlxsw_sp_fib_entry_del(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
return mlxsw_sp_fib_entry_op(mlxsw_sp, fib_entry,
MLXSW_REG_RALUE_OP_WRITE_DELETE);
}
static int
mlxsw_sp_fib4_entry_type_set(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct fib_info *fi = fen_info->fi;
switch (fen_info->type) {
case RTN_BROADCAST: /* fall through */
case RTN_LOCAL:
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
return 0;
case RTN_UNREACHABLE: /* fall through */
case RTN_BLACKHOLE: /* fall through */
case RTN_PROHIBIT:
/* Packets hitting these routes need to be trapped, but
* can do so with a lower priority than packets directed
* at the host, so use action type local instead of trap.
*/
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL;
return 0;
case RTN_UNICAST:
if (fi->fib_nh->nh_scope != RT_SCOPE_LINK)
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_LOCAL;
else
fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_REMOTE;
return 0;
default:
return -EINVAL;
}
}
static struct mlxsw_sp_fib_entry *
mlxsw_sp_fib4_entry_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node,
const struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib_entry *fib_entry;
int err;
fib_entry = kzalloc(sizeof(*fib_entry), GFP_KERNEL);
if (!fib_entry) {
err = -ENOMEM;
goto err_fib_entry_alloc;
}
err = mlxsw_sp_fib4_entry_type_set(mlxsw_sp, fen_info, fib_entry);
if (err)
goto err_fib4_entry_type_set;
err = mlxsw_sp_nexthop_group_get(mlxsw_sp, fib_entry, fen_info->fi);
if (err)
goto err_nexthop_group_get;
fib_entry->params.prio = fen_info->fi->fib_priority;
fib_entry->params.tb_id = fen_info->tb_id;
fib_entry->params.type = fen_info->type;
fib_entry->params.tos = fen_info->tos;
fib_entry->fib_node = fib_node;
return fib_entry;
err_nexthop_group_get:
err_fib4_entry_type_set:
kfree(fib_entry);
err_fib_entry_alloc:
return ERR_PTR(err);
}
static void mlxsw_sp_fib4_entry_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
mlxsw_sp_nexthop_group_put(mlxsw_sp, fib_entry);
kfree(fib_entry);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib4_node_get(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info);
static struct mlxsw_sp_fib_entry *
mlxsw_sp_fib4_entry_lookup(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib_entry *fib_entry;
struct mlxsw_sp_fib_node *fib_node;
fib_node = mlxsw_sp_fib4_node_get(mlxsw_sp, fen_info);
if (IS_ERR(fib_node))
return NULL;
list_for_each_entry(fib_entry, &fib_node->entry_list, list) {
if (fib_entry->params.tb_id == fen_info->tb_id &&
fib_entry->params.tos == fen_info->tos &&
fib_entry->params.type == fen_info->type &&
fib_entry->nh_group->key.fi == fen_info->fi) {
return fib_entry;
}
}
return NULL;
}
static const struct rhashtable_params mlxsw_sp_fib_ht_params = {
.key_offset = offsetof(struct mlxsw_sp_fib_node, key),
.head_offset = offsetof(struct mlxsw_sp_fib_node, ht_node),
.key_len = sizeof(struct mlxsw_sp_fib_key),
.automatic_shrinking = true,
};
static int mlxsw_sp_fib_node_insert(struct mlxsw_sp_fib *fib,
struct mlxsw_sp_fib_node *fib_node)
{
return rhashtable_insert_fast(&fib->ht, &fib_node->ht_node,
mlxsw_sp_fib_ht_params);
}
static void mlxsw_sp_fib_node_remove(struct mlxsw_sp_fib *fib,
struct mlxsw_sp_fib_node *fib_node)
{
rhashtable_remove_fast(&fib->ht, &fib_node->ht_node,
mlxsw_sp_fib_ht_params);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib_node_lookup(struct mlxsw_sp_fib *fib, const void *addr,
size_t addr_len, unsigned char prefix_len)
{
struct mlxsw_sp_fib_key key;
memset(&key, 0, sizeof(key));
memcpy(key.addr, addr, addr_len);
key.prefix_len = prefix_len;
return rhashtable_lookup_fast(&fib->ht, &key, mlxsw_sp_fib_ht_params);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib_node_create(struct mlxsw_sp_fib *fib, const void *addr,
size_t addr_len, unsigned char prefix_len)
{
struct mlxsw_sp_fib_node *fib_node;
fib_node = kzalloc(sizeof(*fib_node), GFP_KERNEL);
if (!fib_node)
return NULL;
INIT_LIST_HEAD(&fib_node->entry_list);
list_add(&fib_node->list, &fib->node_list);
memcpy(fib_node->key.addr, addr, addr_len);
fib_node->key.prefix_len = prefix_len;
return fib_node;
}
static void mlxsw_sp_fib_node_destroy(struct mlxsw_sp_fib_node *fib_node)
{
list_del(&fib_node->list);
WARN_ON(!list_empty(&fib_node->entry_list));
kfree(fib_node);
}
static bool
mlxsw_sp_fib_node_entry_is_first(const struct mlxsw_sp_fib_node *fib_node,
const struct mlxsw_sp_fib_entry *fib_entry)
{
return list_first_entry(&fib_node->entry_list,
struct mlxsw_sp_fib_entry, list) == fib_entry;
}
static void mlxsw_sp_fib_node_prefix_inc(struct mlxsw_sp_fib_node *fib_node)
{
unsigned char prefix_len = fib_node->key.prefix_len;
struct mlxsw_sp_fib *fib = fib_node->fib;
if (fib->prefix_ref_count[prefix_len]++ == 0)
mlxsw_sp_prefix_usage_set(&fib->prefix_usage, prefix_len);
}
static void mlxsw_sp_fib_node_prefix_dec(struct mlxsw_sp_fib_node *fib_node)
{
unsigned char prefix_len = fib_node->key.prefix_len;
struct mlxsw_sp_fib *fib = fib_node->fib;
if (--fib->prefix_ref_count[prefix_len] == 0)
mlxsw_sp_prefix_usage_clear(&fib->prefix_usage, prefix_len);
}
static int mlxsw_sp_fib_node_init(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node,
struct mlxsw_sp_fib *fib)
{
struct mlxsw_sp_prefix_usage req_prefix_usage;
struct mlxsw_sp_lpm_tree *lpm_tree;
int err;
err = mlxsw_sp_fib_node_insert(fib, fib_node);
if (err)
return err;
fib_node->fib = fib;
mlxsw_sp_prefix_usage_cpy(&req_prefix_usage, &fib->prefix_usage);
mlxsw_sp_prefix_usage_set(&req_prefix_usage, fib_node->key.prefix_len);
if (!mlxsw_sp_prefix_usage_none(&fib->prefix_usage)) {
err = mlxsw_sp_vr_lpm_tree_check(mlxsw_sp, fib,
&req_prefix_usage);
if (err)
goto err_tree_check;
} else {
lpm_tree = mlxsw_sp_lpm_tree_get(mlxsw_sp, &req_prefix_usage,
fib->proto);
if (IS_ERR(lpm_tree))
return PTR_ERR(lpm_tree);
fib->lpm_tree = lpm_tree;
err = mlxsw_sp_vr_lpm_tree_bind(mlxsw_sp, fib);
if (err)
goto err_tree_bind;
}
mlxsw_sp_fib_node_prefix_inc(fib_node);
return 0;
err_tree_bind:
fib->lpm_tree = NULL;
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
err_tree_check:
fib_node->fib = NULL;
mlxsw_sp_fib_node_remove(fib, fib_node);
return err;
}
static void mlxsw_sp_fib_node_fini(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_lpm_tree *lpm_tree = fib_node->fib->lpm_tree;
struct mlxsw_sp_fib *fib = fib_node->fib;
mlxsw_sp_fib_node_prefix_dec(fib_node);
if (mlxsw_sp_prefix_usage_none(&fib->prefix_usage)) {
mlxsw_sp_vr_lpm_tree_unbind(mlxsw_sp, fib);
fib->lpm_tree = NULL;
mlxsw_sp_lpm_tree_put(mlxsw_sp, lpm_tree);
} else {
mlxsw_sp_vr_lpm_tree_check(mlxsw_sp, fib, &fib->prefix_usage);
}
fib_node->fib = NULL;
mlxsw_sp_fib_node_remove(fib, fib_node);
}
static struct mlxsw_sp_fib_node *
mlxsw_sp_fib4_node_get(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib_node *fib_node;
struct mlxsw_sp_fib *fib;
struct mlxsw_sp_vr *vr;
int err;
vr = mlxsw_sp_vr_get(mlxsw_sp, fen_info->tb_id);
if (IS_ERR(vr))
return ERR_CAST(vr);
fib = mlxsw_sp_vr_fib(vr, MLXSW_SP_L3_PROTO_IPV4);
fib_node = mlxsw_sp_fib_node_lookup(fib, &fen_info->dst,
sizeof(fen_info->dst),
fen_info->dst_len);
if (fib_node)
return fib_node;
fib_node = mlxsw_sp_fib_node_create(fib, &fen_info->dst,
sizeof(fen_info->dst),
fen_info->dst_len);
if (!fib_node) {
err = -ENOMEM;
goto err_fib_node_create;
}
err = mlxsw_sp_fib_node_init(mlxsw_sp, fib_node, fib);
if (err)
goto err_fib_node_init;
return fib_node;
err_fib_node_init:
mlxsw_sp_fib_node_destroy(fib_node);
err_fib_node_create:
mlxsw_sp_vr_put(vr);
return ERR_PTR(err);
}
static void mlxsw_sp_fib4_node_put(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_vr *vr = fib_node->fib->vr;
if (!list_empty(&fib_node->entry_list))
return;
mlxsw_sp_fib_node_fini(mlxsw_sp, fib_node);
mlxsw_sp_fib_node_destroy(fib_node);
mlxsw_sp_vr_put(vr);
}
static struct mlxsw_sp_fib_entry *
mlxsw_sp_fib4_node_entry_find(const struct mlxsw_sp_fib_node *fib_node,
const struct mlxsw_sp_fib_entry_params *params)
{
struct mlxsw_sp_fib_entry *fib_entry;
list_for_each_entry(fib_entry, &fib_node->entry_list, list) {
if (fib_entry->params.tb_id > params->tb_id)
continue;
if (fib_entry->params.tb_id != params->tb_id)
break;
if (fib_entry->params.tos > params->tos)
continue;
if (fib_entry->params.prio >= params->prio ||
fib_entry->params.tos < params->tos)
return fib_entry;
}
return NULL;
}
static int mlxsw_sp_fib4_node_list_append(struct mlxsw_sp_fib_entry *fib_entry,
struct mlxsw_sp_fib_entry *new_entry)
{
struct mlxsw_sp_fib_node *fib_node;
if (WARN_ON(!fib_entry))
return -EINVAL;
fib_node = fib_entry->fib_node;
list_for_each_entry_from(fib_entry, &fib_node->entry_list, list) {
if (fib_entry->params.tb_id != new_entry->params.tb_id ||
fib_entry->params.tos != new_entry->params.tos ||
fib_entry->params.prio != new_entry->params.prio)
break;
}
list_add_tail(&new_entry->list, &fib_entry->list);
return 0;
}
static int
mlxsw_sp_fib4_node_list_insert(struct mlxsw_sp_fib_node *fib_node,
struct mlxsw_sp_fib_entry *new_entry,
bool replace, bool append)
{
struct mlxsw_sp_fib_entry *fib_entry;
fib_entry = mlxsw_sp_fib4_node_entry_find(fib_node, &new_entry->params);
if (append)
return mlxsw_sp_fib4_node_list_append(fib_entry, new_entry);
if (replace && WARN_ON(!fib_entry))
return -EINVAL;
/* Insert new entry before replaced one, so that we can later
* remove the second.
*/
if (fib_entry) {
list_add_tail(&new_entry->list, &fib_entry->list);
} else {
struct mlxsw_sp_fib_entry *last;
list_for_each_entry(last, &fib_node->entry_list, list) {
if (new_entry->params.tb_id > last->params.tb_id)
break;
fib_entry = last;
}
if (fib_entry)
list_add(&new_entry->list, &fib_entry->list);
else
list_add(&new_entry->list, &fib_node->entry_list);
}
return 0;
}
static void
mlxsw_sp_fib4_node_list_remove(struct mlxsw_sp_fib_entry *fib_entry)
{
list_del(&fib_entry->list);
}
static int
mlxsw_sp_fib4_node_entry_add(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib_node *fib_node,
struct mlxsw_sp_fib_entry *fib_entry)
{
if (!mlxsw_sp_fib_node_entry_is_first(fib_node, fib_entry))
return 0;
/* To prevent packet loss, overwrite the previously offloaded
* entry.
*/
if (!list_is_singular(&fib_node->entry_list)) {
enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_DELETE;
struct mlxsw_sp_fib_entry *n = list_next_entry(fib_entry, list);
mlxsw_sp_fib_entry_offload_refresh(n, op, 0);
}
return mlxsw_sp_fib_entry_update(mlxsw_sp, fib_entry);
}
static void
mlxsw_sp_fib4_node_entry_del(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_fib_node *fib_node,
struct mlxsw_sp_fib_entry *fib_entry)
{
if (!mlxsw_sp_fib_node_entry_is_first(fib_node, fib_entry))
return;
/* Promote the next entry by overwriting the deleted entry */
if (!list_is_singular(&fib_node->entry_list)) {
struct mlxsw_sp_fib_entry *n = list_next_entry(fib_entry, list);
enum mlxsw_reg_ralue_op op = MLXSW_REG_RALUE_OP_WRITE_DELETE;
mlxsw_sp_fib_entry_update(mlxsw_sp, n);
mlxsw_sp_fib_entry_offload_refresh(fib_entry, op, 0);
return;
}
mlxsw_sp_fib_entry_del(mlxsw_sp, fib_entry);
}
static int mlxsw_sp_fib4_node_entry_link(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
bool replace, bool append)
{
struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node;
int err;
err = mlxsw_sp_fib4_node_list_insert(fib_node, fib_entry, replace,
append);
if (err)
return err;
err = mlxsw_sp_fib4_node_entry_add(mlxsw_sp, fib_node, fib_entry);
if (err)
goto err_fib4_node_entry_add;
return 0;
err_fib4_node_entry_add:
mlxsw_sp_fib4_node_list_remove(fib_entry);
return err;
}
static void
mlxsw_sp_fib4_node_entry_unlink(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry)
{
struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node;
mlxsw_sp_fib4_node_entry_del(mlxsw_sp, fib_node, fib_entry);
mlxsw_sp_fib4_node_list_remove(fib_entry);
}
static void mlxsw_sp_fib4_entry_replace(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_entry *fib_entry,
bool replace)
{
struct mlxsw_sp_fib_node *fib_node = fib_entry->fib_node;
struct mlxsw_sp_fib_entry *replaced;
if (!replace)
return;
/* We inserted the new entry before replaced one */
replaced = list_next_entry(fib_entry, list);
mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, replaced);
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, replaced);
mlxsw_sp_fib4_node_put(mlxsw_sp, fib_node);
}
static int
mlxsw_sp_router_fib4_add(struct mlxsw_sp *mlxsw_sp,
const struct fib_entry_notifier_info *fen_info,
bool replace, bool append)
{
struct mlxsw_sp_fib_entry *fib_entry;
struct mlxsw_sp_fib_node *fib_node;
int err;
if (mlxsw_sp->router->aborted)
return 0;
fib_node = mlxsw_sp_fib4_node_get(mlxsw_sp, fen_info);
if (IS_ERR(fib_node)) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to get FIB node\n");
return PTR_ERR(fib_node);
}
fib_entry = mlxsw_sp_fib4_entry_create(mlxsw_sp, fib_node, fen_info);
if (IS_ERR(fib_entry)) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to create FIB entry\n");
err = PTR_ERR(fib_entry);
goto err_fib4_entry_create;
}
err = mlxsw_sp_fib4_node_entry_link(mlxsw_sp, fib_entry, replace,
append);
if (err) {
dev_warn(mlxsw_sp->bus_info->dev, "Failed to link FIB entry to node\n");
goto err_fib4_node_entry_link;
}
mlxsw_sp_fib4_entry_replace(mlxsw_sp, fib_entry, replace);
return 0;
err_fib4_node_entry_link:
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib_entry);
err_fib4_entry_create:
mlxsw_sp_fib4_node_put(mlxsw_sp, fib_node);
return err;
}
static void mlxsw_sp_router_fib4_del(struct mlxsw_sp *mlxsw_sp,
struct fib_entry_notifier_info *fen_info)
{
struct mlxsw_sp_fib_entry *fib_entry;
struct mlxsw_sp_fib_node *fib_node;
if (mlxsw_sp->router->aborted)
return;
fib_entry = mlxsw_sp_fib4_entry_lookup(mlxsw_sp, fen_info);
if (WARN_ON(!fib_entry))
return;
fib_node = fib_entry->fib_node;
mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, fib_entry);
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib_entry);
mlxsw_sp_fib4_node_put(mlxsw_sp, fib_node);
}
static int mlxsw_sp_router_set_abort_trap(struct mlxsw_sp *mlxsw_sp)
{
char ralta_pl[MLXSW_REG_RALTA_LEN];
char ralst_pl[MLXSW_REG_RALST_LEN];
int i, err;
mlxsw_reg_ralta_pack(ralta_pl, true, MLXSW_REG_RALXX_PROTOCOL_IPV4,
MLXSW_SP_LPM_TREE_MIN);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralta), ralta_pl);
if (err)
return err;
mlxsw_reg_ralst_pack(ralst_pl, 0xff, MLXSW_SP_LPM_TREE_MIN);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralst), ralst_pl);
if (err)
return err;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i];
char raltb_pl[MLXSW_REG_RALTB_LEN];
char ralue_pl[MLXSW_REG_RALUE_LEN];
if (!mlxsw_sp_vr_is_used(vr))
continue;
mlxsw_reg_raltb_pack(raltb_pl, vr->id,
MLXSW_REG_RALXX_PROTOCOL_IPV4,
MLXSW_SP_LPM_TREE_MIN);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(raltb),
raltb_pl);
if (err)
return err;
mlxsw_reg_ralue_pack4(ralue_pl, MLXSW_SP_L3_PROTO_IPV4,
MLXSW_REG_RALUE_OP_WRITE_WRITE, vr->id, 0,
0);
mlxsw_reg_ralue_act_ip2me_pack(ralue_pl);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ralue),
ralue_pl);
if (err)
return err;
}
return 0;
}
static void mlxsw_sp_fib4_node_flush(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
struct mlxsw_sp_fib_entry *fib_entry, *tmp;
list_for_each_entry_safe(fib_entry, tmp, &fib_node->entry_list, list) {
bool do_break = &tmp->list == &fib_node->entry_list;
mlxsw_sp_fib4_node_entry_unlink(mlxsw_sp, fib_entry);
mlxsw_sp_fib4_entry_destroy(mlxsw_sp, fib_entry);
mlxsw_sp_fib4_node_put(mlxsw_sp, fib_node);
/* Break when entry list is empty and node was freed.
* Otherwise, we'll access freed memory in the next
* iteration.
*/
if (do_break)
break;
}
}
static void mlxsw_sp_fib_node_flush(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_fib_node *fib_node)
{
switch (fib_node->fib->proto) {
case MLXSW_SP_L3_PROTO_IPV4:
mlxsw_sp_fib4_node_flush(mlxsw_sp, fib_node);
break;
case MLXSW_SP_L3_PROTO_IPV6:
WARN_ON_ONCE(1);
break;
}
}
static void mlxsw_sp_vr_fib_flush(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_vr *vr,
enum mlxsw_sp_l3proto proto)
{
struct mlxsw_sp_fib *fib = mlxsw_sp_vr_fib(vr, proto);
struct mlxsw_sp_fib_node *fib_node, *tmp;
list_for_each_entry_safe(fib_node, tmp, &fib->node_list, list) {
bool do_break = &tmp->list == &fib->node_list;
mlxsw_sp_fib_node_flush(mlxsw_sp, fib_node);
if (do_break)
break;
}
}
static void mlxsw_sp_router_fib_flush(struct mlxsw_sp *mlxsw_sp)
{
int i;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_VRS); i++) {
struct mlxsw_sp_vr *vr = &mlxsw_sp->router->vrs[i];
if (!mlxsw_sp_vr_is_used(vr))
continue;
mlxsw_sp_vr_fib_flush(mlxsw_sp, vr, MLXSW_SP_L3_PROTO_IPV4);
}
}
static void mlxsw_sp_router_fib4_abort(struct mlxsw_sp *mlxsw_sp)
{
int err;
if (mlxsw_sp->router->aborted)
return;
dev_warn(mlxsw_sp->bus_info->dev, "FIB abort triggered. Note that FIB entries are no longer being offloaded to this device.\n");
mlxsw_sp_router_fib_flush(mlxsw_sp);
mlxsw_sp->router->aborted = true;
err = mlxsw_sp_router_set_abort_trap(mlxsw_sp);
if (err)
dev_warn(mlxsw_sp->bus_info->dev, "Failed to set abort trap.\n");
}
struct mlxsw_sp_fib_event_work {
struct work_struct work;
union {
struct fib_entry_notifier_info fen_info;
struct fib_rule_notifier_info fr_info;
struct fib_nh_notifier_info fnh_info;
};
struct mlxsw_sp *mlxsw_sp;
unsigned long event;
};
static void mlxsw_sp_router_fib_event_work(struct work_struct *work)
{
struct mlxsw_sp_fib_event_work *fib_work =
container_of(work, struct mlxsw_sp_fib_event_work, work);
struct mlxsw_sp *mlxsw_sp = fib_work->mlxsw_sp;
struct fib_rule *rule;
bool replace, append;
int err;
/* Protect internal structures from changes */
rtnl_lock();
switch (fib_work->event) {
case FIB_EVENT_ENTRY_REPLACE: /* fall through */
case FIB_EVENT_ENTRY_APPEND: /* fall through */
case FIB_EVENT_ENTRY_ADD:
replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE;
append = fib_work->event == FIB_EVENT_ENTRY_APPEND;
err = mlxsw_sp_router_fib4_add(mlxsw_sp, &fib_work->fen_info,
replace, append);
if (err)
mlxsw_sp_router_fib4_abort(mlxsw_sp);
fib_info_put(fib_work->fen_info.fi);
break;
case FIB_EVENT_ENTRY_DEL:
mlxsw_sp_router_fib4_del(mlxsw_sp, &fib_work->fen_info);
fib_info_put(fib_work->fen_info.fi);
break;
case FIB_EVENT_RULE_ADD: /* fall through */
case FIB_EVENT_RULE_DEL:
rule = fib_work->fr_info.rule;
if (!fib4_rule_default(rule) && !rule->l3mdev)
mlxsw_sp_router_fib4_abort(mlxsw_sp);
fib_rule_put(rule);
break;
case FIB_EVENT_NH_ADD: /* fall through */
case FIB_EVENT_NH_DEL:
mlxsw_sp_nexthop_event(mlxsw_sp, fib_work->event,
fib_work->fnh_info.fib_nh);
fib_info_put(fib_work->fnh_info.fib_nh->nh_parent);
break;
}
rtnl_unlock();
kfree(fib_work);
}
/* Called with rcu_read_lock() */
static int mlxsw_sp_router_fib_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct mlxsw_sp_fib_event_work *fib_work;
struct fib_notifier_info *info = ptr;
struct mlxsw_sp_router *router;
if (!net_eq(info->net, &init_net))
return NOTIFY_DONE;
fib_work = kzalloc(sizeof(*fib_work), GFP_ATOMIC);
if (WARN_ON(!fib_work))
return NOTIFY_BAD;
INIT_WORK(&fib_work->work, mlxsw_sp_router_fib_event_work);
router = container_of(nb, struct mlxsw_sp_router, fib_nb);
fib_work->mlxsw_sp = router->mlxsw_sp;
fib_work->event = event;
switch (event) {
case FIB_EVENT_ENTRY_REPLACE: /* fall through */
case FIB_EVENT_ENTRY_APPEND: /* fall through */
case FIB_EVENT_ENTRY_ADD: /* fall through */
case FIB_EVENT_ENTRY_DEL:
memcpy(&fib_work->fen_info, ptr, sizeof(fib_work->fen_info));
/* Take referece on fib_info to prevent it from being
* freed while work is queued. Release it afterwards.
*/
fib_info_hold(fib_work->fen_info.fi);
break;
case FIB_EVENT_RULE_ADD: /* fall through */
case FIB_EVENT_RULE_DEL:
memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
fib_rule_get(fib_work->fr_info.rule);
break;
case FIB_EVENT_NH_ADD: /* fall through */
case FIB_EVENT_NH_DEL:
memcpy(&fib_work->fnh_info, ptr, sizeof(fib_work->fnh_info));
fib_info_hold(fib_work->fnh_info.fib_nh->nh_parent);
break;
}
mlxsw_core_schedule_work(&fib_work->work);
return NOTIFY_DONE;
}
static struct mlxsw_sp_rif *
mlxsw_sp_rif_find_by_dev(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
int i;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++)
if (mlxsw_sp->router->rifs[i] &&
mlxsw_sp->router->rifs[i]->dev == dev)
return mlxsw_sp->router->rifs[i];
return NULL;
}
static int mlxsw_sp_router_rif_disable(struct mlxsw_sp *mlxsw_sp, u16 rif)
{
char ritr_pl[MLXSW_REG_RITR_LEN];
int err;
mlxsw_reg_ritr_rif_pack(ritr_pl, rif);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
if (WARN_ON_ONCE(err))
return err;
mlxsw_reg_ritr_enable_set(ritr_pl, false);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static void mlxsw_sp_router_rif_gone_sync(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_rif *rif)
{
mlxsw_sp_router_rif_disable(mlxsw_sp, rif->rif_index);
mlxsw_sp_nexthop_rif_gone_sync(mlxsw_sp, rif);
mlxsw_sp_neigh_rif_gone_sync(mlxsw_sp, rif);
}
static bool mlxsw_sp_rif_should_config(struct mlxsw_sp_rif *rif,
const struct in_device *in_dev,
unsigned long event)
{
switch (event) {
case NETDEV_UP:
if (!rif)
return true;
return false;
case NETDEV_DOWN:
if (rif && !in_dev->ifa_list &&
!netif_is_l3_slave(rif->dev))
return true;
/* It is possible we already removed the RIF ourselves
* if it was assigned to a netdev that is now a bridge
* or LAG slave.
*/
return false;
}
return false;
}
static enum mlxsw_sp_rif_type
mlxsw_sp_dev_rif_type(const struct mlxsw_sp *mlxsw_sp,
const struct net_device *dev)
{
enum mlxsw_sp_fid_type type;
/* RIF type is derived from the type of the underlying FID */
if (is_vlan_dev(dev) && netif_is_bridge_master(vlan_dev_real_dev(dev)))
type = MLXSW_SP_FID_TYPE_8021Q;
else if (netif_is_bridge_master(dev) && br_vlan_enabled(dev))
type = MLXSW_SP_FID_TYPE_8021Q;
else if (netif_is_bridge_master(dev))
type = MLXSW_SP_FID_TYPE_8021D;
else
type = MLXSW_SP_FID_TYPE_RFID;
return mlxsw_sp_fid_type_rif_type(mlxsw_sp, type);
}
static int mlxsw_sp_rif_index_alloc(struct mlxsw_sp *mlxsw_sp, u16 *p_rif_index)
{
int i;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++) {
if (!mlxsw_sp->router->rifs[i]) {
*p_rif_index = i;
return 0;
}
}
return -ENOBUFS;
}
static struct mlxsw_sp_rif *mlxsw_sp_rif_alloc(size_t rif_size, u16 rif_index,
u16 vr_id,
struct net_device *l3_dev)
{
struct mlxsw_sp_rif *rif;
rif = kzalloc(rif_size, GFP_KERNEL);
if (!rif)
return NULL;
INIT_LIST_HEAD(&rif->nexthop_list);
INIT_LIST_HEAD(&rif->neigh_list);
ether_addr_copy(rif->addr, l3_dev->dev_addr);
rif->mtu = l3_dev->mtu;
rif->vr_id = vr_id;
rif->dev = l3_dev;
rif->rif_index = rif_index;
return rif;
}
struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp,
u16 rif_index)
{
return mlxsw_sp->router->rifs[rif_index];
}
u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif)
{
return rif->rif_index;
}
int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif)
{
return rif->dev->ifindex;
}
static struct mlxsw_sp_rif *
mlxsw_sp_rif_create(struct mlxsw_sp *mlxsw_sp,
const struct mlxsw_sp_rif_params *params)
{
u32 tb_id = l3mdev_fib_table(params->dev);
const struct mlxsw_sp_rif_ops *ops;
enum mlxsw_sp_rif_type type;
struct mlxsw_sp_rif *rif;
struct mlxsw_sp_fid *fid;
struct mlxsw_sp_vr *vr;
u16 rif_index;
int err;
type = mlxsw_sp_dev_rif_type(mlxsw_sp, params->dev);
ops = mlxsw_sp->router->rif_ops_arr[type];
vr = mlxsw_sp_vr_get(mlxsw_sp, tb_id ? : RT_TABLE_MAIN);
if (IS_ERR(vr))
return ERR_CAST(vr);
err = mlxsw_sp_rif_index_alloc(mlxsw_sp, &rif_index);
if (err)
goto err_rif_index_alloc;
rif = mlxsw_sp_rif_alloc(ops->rif_size, rif_index, vr->id, params->dev);
if (!rif) {
err = -ENOMEM;
goto err_rif_alloc;
}
rif->mlxsw_sp = mlxsw_sp;
rif->ops = ops;
fid = ops->fid_get(rif);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
goto err_fid_get;
}
rif->fid = fid;
if (ops->setup)
ops->setup(rif, params);
err = ops->configure(rif);
if (err)
goto err_configure;
err = mlxsw_sp_rif_fdb_op(mlxsw_sp, params->dev->dev_addr,
mlxsw_sp_fid_index(fid), true);
if (err)
goto err_rif_fdb_op;
mlxsw_sp_rif_counters_alloc(rif);
mlxsw_sp_fid_rif_set(fid, rif);
mlxsw_sp->router->rifs[rif_index] = rif;
vr->rif_count++;
return rif;
err_rif_fdb_op:
ops->deconfigure(rif);
err_configure:
mlxsw_sp_fid_put(fid);
err_fid_get:
kfree(rif);
err_rif_alloc:
err_rif_index_alloc:
mlxsw_sp_vr_put(vr);
return ERR_PTR(err);
}
void mlxsw_sp_rif_destroy(struct mlxsw_sp_rif *rif)
{
const struct mlxsw_sp_rif_ops *ops = rif->ops;
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_fid *fid = rif->fid;
struct mlxsw_sp_vr *vr;
mlxsw_sp_router_rif_gone_sync(mlxsw_sp, rif);
vr = &mlxsw_sp->router->vrs[rif->vr_id];
vr->rif_count--;
mlxsw_sp->router->rifs[rif->rif_index] = NULL;
mlxsw_sp_fid_rif_set(fid, NULL);
mlxsw_sp_rif_counters_free(rif);
mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->dev->dev_addr,
mlxsw_sp_fid_index(fid), false);
ops->deconfigure(rif);
mlxsw_sp_fid_put(fid);
kfree(rif);
mlxsw_sp_vr_put(vr);
}
static void
mlxsw_sp_rif_subport_params_init(struct mlxsw_sp_rif_params *params,
struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan)
{
struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port;
params->vid = mlxsw_sp_port_vlan->vid;
params->lag = mlxsw_sp_port->lagged;
if (params->lag)
params->lag_id = mlxsw_sp_port->lag_id;
else
params->system_port = mlxsw_sp_port->local_port;
}
static int
mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan,
struct net_device *l3_dev)
{
struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port;
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
u16 vid = mlxsw_sp_port_vlan->vid;
struct mlxsw_sp_rif *rif;
struct mlxsw_sp_fid *fid;
int err;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev);
if (!rif) {
struct mlxsw_sp_rif_params params = {
.dev = l3_dev,
};
mlxsw_sp_rif_subport_params_init(&params, mlxsw_sp_port_vlan);
rif = mlxsw_sp_rif_create(mlxsw_sp, &params);
if (IS_ERR(rif))
return PTR_ERR(rif);
}
/* FID was already created, just take a reference */
fid = rif->ops->fid_get(rif);
err = mlxsw_sp_fid_port_vid_map(fid, mlxsw_sp_port, vid);
if (err)
goto err_fid_port_vid_map;
err = mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, false);
if (err)
goto err_port_vid_learning_set;
err = mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid,
BR_STATE_FORWARDING);
if (err)
goto err_port_vid_stp_set;
mlxsw_sp_port_vlan->fid = fid;
return 0;
err_port_vid_stp_set:
mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true);
err_port_vid_learning_set:
mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid);
err_fid_port_vid_map:
mlxsw_sp_fid_put(fid);
return err;
}
void
mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan)
{
struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port;
struct mlxsw_sp_fid *fid = mlxsw_sp_port_vlan->fid;
u16 vid = mlxsw_sp_port_vlan->vid;
if (WARN_ON(mlxsw_sp_fid_type(fid) != MLXSW_SP_FID_TYPE_RFID))
return;
mlxsw_sp_port_vlan->fid = NULL;
mlxsw_sp_port_vid_stp_set(mlxsw_sp_port, vid, BR_STATE_BLOCKING);
mlxsw_sp_port_vid_learning_set(mlxsw_sp_port, vid, true);
mlxsw_sp_fid_port_vid_unmap(fid, mlxsw_sp_port, vid);
/* If router port holds the last reference on the rFID, then the
* associated Sub-port RIF will be destroyed.
*/
mlxsw_sp_fid_put(fid);
}
static int mlxsw_sp_inetaddr_port_vlan_event(struct net_device *l3_dev,
struct net_device *port_dev,
unsigned long event, u16 vid)
{
struct mlxsw_sp_port *mlxsw_sp_port = netdev_priv(port_dev);
struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan;
mlxsw_sp_port_vlan = mlxsw_sp_port_vlan_find_by_vid(mlxsw_sp_port, vid);
if (WARN_ON(!mlxsw_sp_port_vlan))
return -EINVAL;
switch (event) {
case NETDEV_UP:
return mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan,
l3_dev);
case NETDEV_DOWN:
mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan);
break;
}
return 0;
}
static int mlxsw_sp_inetaddr_port_event(struct net_device *port_dev,
unsigned long event)
{
if (netif_is_bridge_port(port_dev) ||
netif_is_lag_port(port_dev) ||
netif_is_ovs_port(port_dev))
return 0;
return mlxsw_sp_inetaddr_port_vlan_event(port_dev, port_dev, event, 1);
}
static int __mlxsw_sp_inetaddr_lag_event(struct net_device *l3_dev,
struct net_device *lag_dev,
unsigned long event, u16 vid)
{
struct net_device *port_dev;
struct list_head *iter;
int err;
netdev_for_each_lower_dev(lag_dev, port_dev, iter) {
if (mlxsw_sp_port_dev_check(port_dev)) {
err = mlxsw_sp_inetaddr_port_vlan_event(l3_dev,
port_dev,
event, vid);
if (err)
return err;
}
}
return 0;
}
static int mlxsw_sp_inetaddr_lag_event(struct net_device *lag_dev,
unsigned long event)
{
if (netif_is_bridge_port(lag_dev))
return 0;
return __mlxsw_sp_inetaddr_lag_event(lag_dev, lag_dev, event, 1);
}
static int mlxsw_sp_inetaddr_bridge_event(struct net_device *l3_dev,
unsigned long event)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev);
struct mlxsw_sp_rif_params params = {
.dev = l3_dev,
};
struct mlxsw_sp_rif *rif;
switch (event) {
case NETDEV_UP:
rif = mlxsw_sp_rif_create(mlxsw_sp, &params);
if (IS_ERR(rif))
return PTR_ERR(rif);
break;
case NETDEV_DOWN:
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev);
mlxsw_sp_rif_destroy(rif);
break;
}
return 0;
}
static int mlxsw_sp_inetaddr_vlan_event(struct net_device *vlan_dev,
unsigned long event)
{
struct net_device *real_dev = vlan_dev_real_dev(vlan_dev);
u16 vid = vlan_dev_vlan_id(vlan_dev);
if (netif_is_bridge_port(vlan_dev))
return 0;
if (mlxsw_sp_port_dev_check(real_dev))
return mlxsw_sp_inetaddr_port_vlan_event(vlan_dev, real_dev,
event, vid);
else if (netif_is_lag_master(real_dev))
return __mlxsw_sp_inetaddr_lag_event(vlan_dev, real_dev, event,
vid);
else if (netif_is_bridge_master(real_dev) && br_vlan_enabled(real_dev))
return mlxsw_sp_inetaddr_bridge_event(vlan_dev, event);
return 0;
}
static int __mlxsw_sp_inetaddr_event(struct net_device *dev,
unsigned long event)
{
if (mlxsw_sp_port_dev_check(dev))
return mlxsw_sp_inetaddr_port_event(dev, event);
else if (netif_is_lag_master(dev))
return mlxsw_sp_inetaddr_lag_event(dev, event);
else if (netif_is_bridge_master(dev))
return mlxsw_sp_inetaddr_bridge_event(dev, event);
else if (is_vlan_dev(dev))
return mlxsw_sp_inetaddr_vlan_event(dev, event);
else
return 0;
}
int mlxsw_sp_inetaddr_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct in_ifaddr *ifa = (struct in_ifaddr *) ptr;
struct net_device *dev = ifa->ifa_dev->dev;
struct mlxsw_sp *mlxsw_sp;
struct mlxsw_sp_rif *rif;
int err = 0;
mlxsw_sp = mlxsw_sp_lower_get(dev);
if (!mlxsw_sp)
goto out;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!mlxsw_sp_rif_should_config(rif, ifa->ifa_dev, event))
goto out;
err = __mlxsw_sp_inetaddr_event(dev, event);
out:
return notifier_from_errno(err);
}
static int mlxsw_sp_rif_edit(struct mlxsw_sp *mlxsw_sp, u16 rif_index,
const char *mac, int mtu)
{
char ritr_pl[MLXSW_REG_RITR_LEN];
int err;
mlxsw_reg_ritr_rif_pack(ritr_pl, rif_index);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
if (err)
return err;
mlxsw_reg_ritr_mtu_set(ritr_pl, mtu);
mlxsw_reg_ritr_if_mac_memcpy_to(ritr_pl, mac);
mlxsw_reg_ritr_op_set(ritr_pl, MLXSW_REG_RITR_RIF_CREATE);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
int mlxsw_sp_netdevice_router_port_event(struct net_device *dev)
{
struct mlxsw_sp *mlxsw_sp;
struct mlxsw_sp_rif *rif;
u16 fid_index;
int err;
mlxsw_sp = mlxsw_sp_lower_get(dev);
if (!mlxsw_sp)
return 0;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, dev);
if (!rif)
return 0;
fid_index = mlxsw_sp_fid_index(rif->fid);
err = mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, false);
if (err)
return err;
err = mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, dev->dev_addr,
dev->mtu);
if (err)
goto err_rif_edit;
err = mlxsw_sp_rif_fdb_op(mlxsw_sp, dev->dev_addr, fid_index, true);
if (err)
goto err_rif_fdb_op;
ether_addr_copy(rif->addr, dev->dev_addr);
rif->mtu = dev->mtu;
netdev_dbg(dev, "Updated RIF=%d\n", rif->rif_index);
return 0;
err_rif_fdb_op:
mlxsw_sp_rif_edit(mlxsw_sp, rif->rif_index, rif->addr, rif->mtu);
err_rif_edit:
mlxsw_sp_rif_fdb_op(mlxsw_sp, rif->addr, fid_index, true);
return err;
}
static int mlxsw_sp_port_vrf_join(struct mlxsw_sp *mlxsw_sp,
struct net_device *l3_dev)
{
struct mlxsw_sp_rif *rif;
/* If netdev is already associated with a RIF, then we need to
* destroy it and create a new one with the new virtual router ID.
*/
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev);
if (rif)
__mlxsw_sp_inetaddr_event(l3_dev, NETDEV_DOWN);
return __mlxsw_sp_inetaddr_event(l3_dev, NETDEV_UP);
}
static void mlxsw_sp_port_vrf_leave(struct mlxsw_sp *mlxsw_sp,
struct net_device *l3_dev)
{
struct mlxsw_sp_rif *rif;
rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev);
if (!rif)
return;
__mlxsw_sp_inetaddr_event(l3_dev, NETDEV_DOWN);
}
int mlxsw_sp_netdevice_vrf_event(struct net_device *l3_dev, unsigned long event,
struct netdev_notifier_changeupper_info *info)
{
struct mlxsw_sp *mlxsw_sp = mlxsw_sp_lower_get(l3_dev);
int err = 0;
if (!mlxsw_sp)
return 0;
switch (event) {
case NETDEV_PRECHANGEUPPER:
return 0;
case NETDEV_CHANGEUPPER:
if (info->linking)
err = mlxsw_sp_port_vrf_join(mlxsw_sp, l3_dev);
else
mlxsw_sp_port_vrf_leave(mlxsw_sp, l3_dev);
break;
}
return err;
}
static struct mlxsw_sp_rif_subport *
mlxsw_sp_rif_subport_rif(const struct mlxsw_sp_rif *rif)
{
return container_of(rif, struct mlxsw_sp_rif_subport, common);
}
static void mlxsw_sp_rif_subport_setup(struct mlxsw_sp_rif *rif,
const struct mlxsw_sp_rif_params *params)
{
struct mlxsw_sp_rif_subport *rif_subport;
rif_subport = mlxsw_sp_rif_subport_rif(rif);
rif_subport->vid = params->vid;
rif_subport->lag = params->lag;
if (params->lag)
rif_subport->lag_id = params->lag_id;
else
rif_subport->system_port = params->system_port;
}
static int mlxsw_sp_rif_subport_op(struct mlxsw_sp_rif *rif, bool enable)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
struct mlxsw_sp_rif_subport *rif_subport;
char ritr_pl[MLXSW_REG_RITR_LEN];
rif_subport = mlxsw_sp_rif_subport_rif(rif);
mlxsw_reg_ritr_pack(ritr_pl, enable, MLXSW_REG_RITR_SP_IF,
rif->rif_index, rif->vr_id, rif->dev->mtu,
rif->dev->dev_addr);
mlxsw_reg_ritr_sp_if_pack(ritr_pl, rif_subport->lag,
rif_subport->lag ? rif_subport->lag_id :
rif_subport->system_port,
rif_subport->vid);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static int mlxsw_sp_rif_subport_configure(struct mlxsw_sp_rif *rif)
{
return mlxsw_sp_rif_subport_op(rif, true);
}
static void mlxsw_sp_rif_subport_deconfigure(struct mlxsw_sp_rif *rif)
{
mlxsw_sp_rif_subport_op(rif, false);
}
static struct mlxsw_sp_fid *
mlxsw_sp_rif_subport_fid_get(struct mlxsw_sp_rif *rif)
{
return mlxsw_sp_fid_rfid_get(rif->mlxsw_sp, rif->rif_index);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_subport_ops = {
.type = MLXSW_SP_RIF_TYPE_SUBPORT,
.rif_size = sizeof(struct mlxsw_sp_rif_subport),
.setup = mlxsw_sp_rif_subport_setup,
.configure = mlxsw_sp_rif_subport_configure,
.deconfigure = mlxsw_sp_rif_subport_deconfigure,
.fid_get = mlxsw_sp_rif_subport_fid_get,
};
static int mlxsw_sp_rif_vlan_fid_op(struct mlxsw_sp_rif *rif,
enum mlxsw_reg_ritr_if_type type,
u16 vid_fid, bool enable)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
char ritr_pl[MLXSW_REG_RITR_LEN];
mlxsw_reg_ritr_pack(ritr_pl, enable, type, rif->rif_index, rif->vr_id,
rif->dev->mtu, rif->dev->dev_addr);
mlxsw_reg_ritr_fid_set(ritr_pl, type, vid_fid);
return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ritr), ritr_pl);
}
static u8 mlxsw_sp_router_port(const struct mlxsw_sp *mlxsw_sp)
{
return mlxsw_core_max_ports(mlxsw_sp->core) + 1;
}
static int mlxsw_sp_rif_vlan_configure(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid);
int err;
err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, true);
if (err)
return err;
err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), true);
if (err)
goto err_fid_bc_flood_set;
return 0;
err_fid_bc_flood_set:
mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, false);
return err;
}
static void mlxsw_sp_rif_vlan_deconfigure(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
u16 vid = mlxsw_sp_fid_8021q_vid(rif->fid);
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), false);
mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_VLAN_IF, vid, false);
}
static struct mlxsw_sp_fid *
mlxsw_sp_rif_vlan_fid_get(struct mlxsw_sp_rif *rif)
{
u16 vid = is_vlan_dev(rif->dev) ? vlan_dev_vlan_id(rif->dev) : 1;
return mlxsw_sp_fid_8021q_get(rif->mlxsw_sp, vid);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_vlan_ops = {
.type = MLXSW_SP_RIF_TYPE_VLAN,
.rif_size = sizeof(struct mlxsw_sp_rif),
.configure = mlxsw_sp_rif_vlan_configure,
.deconfigure = mlxsw_sp_rif_vlan_deconfigure,
.fid_get = mlxsw_sp_rif_vlan_fid_get,
};
static int mlxsw_sp_rif_fid_configure(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
u16 fid_index = mlxsw_sp_fid_index(rif->fid);
int err;
err = mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index,
true);
if (err)
return err;
err = mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), true);
if (err)
goto err_fid_bc_flood_set;
return 0;
err_fid_bc_flood_set:
mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false);
return err;
}
static void mlxsw_sp_rif_fid_deconfigure(struct mlxsw_sp_rif *rif)
{
struct mlxsw_sp *mlxsw_sp = rif->mlxsw_sp;
u16 fid_index = mlxsw_sp_fid_index(rif->fid);
mlxsw_sp_fid_flood_set(rif->fid, MLXSW_SP_FLOOD_TYPE_BC,
mlxsw_sp_router_port(mlxsw_sp), false);
mlxsw_sp_rif_vlan_fid_op(rif, MLXSW_REG_RITR_FID_IF, fid_index, false);
}
static struct mlxsw_sp_fid *
mlxsw_sp_rif_fid_fid_get(struct mlxsw_sp_rif *rif)
{
return mlxsw_sp_fid_8021d_get(rif->mlxsw_sp, rif->dev->ifindex);
}
static const struct mlxsw_sp_rif_ops mlxsw_sp_rif_fid_ops = {
.type = MLXSW_SP_RIF_TYPE_FID,
.rif_size = sizeof(struct mlxsw_sp_rif),
.configure = mlxsw_sp_rif_fid_configure,
.deconfigure = mlxsw_sp_rif_fid_deconfigure,
.fid_get = mlxsw_sp_rif_fid_fid_get,
};
static const struct mlxsw_sp_rif_ops *mlxsw_sp_rif_ops_arr[] = {
[MLXSW_SP_RIF_TYPE_SUBPORT] = &mlxsw_sp_rif_subport_ops,
[MLXSW_SP_RIF_TYPE_VLAN] = &mlxsw_sp_rif_vlan_ops,
[MLXSW_SP_RIF_TYPE_FID] = &mlxsw_sp_rif_fid_ops,
};
static int mlxsw_sp_rifs_init(struct mlxsw_sp *mlxsw_sp)
{
u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
mlxsw_sp->router->rifs = kcalloc(max_rifs,
sizeof(struct mlxsw_sp_rif *),
GFP_KERNEL);
if (!mlxsw_sp->router->rifs)
return -ENOMEM;
mlxsw_sp->router->rif_ops_arr = mlxsw_sp_rif_ops_arr;
return 0;
}
static void mlxsw_sp_rifs_fini(struct mlxsw_sp *mlxsw_sp)
{
int i;
for (i = 0; i < MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS); i++)
WARN_ON_ONCE(mlxsw_sp->router->rifs[i]);
kfree(mlxsw_sp->router->rifs);
}
static void mlxsw_sp_router_fib_dump_flush(struct notifier_block *nb)
{
struct mlxsw_sp_router *router;
/* Flush pending FIB notifications and then flush the device's
* table before requesting another dump. The FIB notification
* block is unregistered, so no need to take RTNL.
*/
mlxsw_core_flush_owq();
router = container_of(nb, struct mlxsw_sp_router, fib_nb);
mlxsw_sp_router_fib_flush(router->mlxsw_sp);
}
static int __mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp)
{
char rgcr_pl[MLXSW_REG_RGCR_LEN];
u64 max_rifs;
int err;
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_RIFS))
return -EIO;
max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
mlxsw_reg_rgcr_pack(rgcr_pl, true);
mlxsw_reg_rgcr_max_router_interfaces_set(rgcr_pl, max_rifs);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl);
if (err)
return err;
return 0;
}
static void __mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp)
{
char rgcr_pl[MLXSW_REG_RGCR_LEN];
mlxsw_reg_rgcr_pack(rgcr_pl, false);
mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rgcr), rgcr_pl);
}
int mlxsw_sp_router_init(struct mlxsw_sp *mlxsw_sp)
{
struct mlxsw_sp_router *router;
int err;
router = kzalloc(sizeof(*mlxsw_sp->router), GFP_KERNEL);
if (!router)
return -ENOMEM;
mlxsw_sp->router = router;
router->mlxsw_sp = mlxsw_sp;
INIT_LIST_HEAD(&mlxsw_sp->router->nexthop_neighs_list);
err = __mlxsw_sp_router_init(mlxsw_sp);
if (err)
goto err_router_init;
err = mlxsw_sp_rifs_init(mlxsw_sp);
if (err)
goto err_rifs_init;
err = rhashtable_init(&mlxsw_sp->router->nexthop_ht,
&mlxsw_sp_nexthop_ht_params);
if (err)
goto err_nexthop_ht_init;
err = rhashtable_init(&mlxsw_sp->router->nexthop_group_ht,
&mlxsw_sp_nexthop_group_ht_params);
if (err)
goto err_nexthop_group_ht_init;
err = mlxsw_sp_lpm_init(mlxsw_sp);
if (err)
goto err_lpm_init;
err = mlxsw_sp_vrs_init(mlxsw_sp);
if (err)
goto err_vrs_init;
err = mlxsw_sp_neigh_init(mlxsw_sp);
if (err)
goto err_neigh_init;
mlxsw_sp->router->fib_nb.notifier_call = mlxsw_sp_router_fib_event;
err = register_fib_notifier(&mlxsw_sp->router->fib_nb,
mlxsw_sp_router_fib_dump_flush);
if (err)
goto err_register_fib_notifier;
return 0;
err_register_fib_notifier:
mlxsw_sp_neigh_fini(mlxsw_sp);
err_neigh_init:
mlxsw_sp_vrs_fini(mlxsw_sp);
err_vrs_init:
mlxsw_sp_lpm_fini(mlxsw_sp);
err_lpm_init:
rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht);
err_nexthop_group_ht_init:
rhashtable_destroy(&mlxsw_sp->router->nexthop_ht);
err_nexthop_ht_init:
mlxsw_sp_rifs_fini(mlxsw_sp);
err_rifs_init:
__mlxsw_sp_router_fini(mlxsw_sp);
err_router_init:
kfree(mlxsw_sp->router);
return err;
}
void mlxsw_sp_router_fini(struct mlxsw_sp *mlxsw_sp)
{
unregister_fib_notifier(&mlxsw_sp->router->fib_nb);
mlxsw_sp_neigh_fini(mlxsw_sp);
mlxsw_sp_vrs_fini(mlxsw_sp);
mlxsw_sp_lpm_fini(mlxsw_sp);
rhashtable_destroy(&mlxsw_sp->router->nexthop_group_ht);
rhashtable_destroy(&mlxsw_sp->router->nexthop_ht);
mlxsw_sp_rifs_fini(mlxsw_sp);
__mlxsw_sp_router_fini(mlxsw_sp);
kfree(mlxsw_sp->router);
}