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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved */
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include "spectrum_mr_tcam.h"
#include "reg.h"
#include "spectrum.h"
#include "core_acl_flex_actions.h"
#include "spectrum_mr.h"
struct mlxsw_sp_mr_tcam {
void *priv;
};
/* This struct maps to one RIGR2 register entry */
struct mlxsw_sp_mr_erif_sublist {
struct list_head list;
u32 rigr2_kvdl_index;
int num_erifs;
u16 erif_indices[MLXSW_REG_RIGR2_MAX_ERIFS];
bool synced;
};
struct mlxsw_sp_mr_tcam_erif_list {
struct list_head erif_sublists;
u32 kvdl_index;
};
static bool
mlxsw_sp_mr_erif_sublist_full(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_mr_erif_sublist *erif_sublist)
{
int erif_list_entries = MLXSW_CORE_RES_GET(mlxsw_sp->core,
MC_ERIF_LIST_ENTRIES);
return erif_sublist->num_erifs == erif_list_entries;
}
static void
mlxsw_sp_mr_erif_list_init(struct mlxsw_sp_mr_tcam_erif_list *erif_list)
{
INIT_LIST_HEAD(&erif_list->erif_sublists);
}
static struct mlxsw_sp_mr_erif_sublist *
mlxsw_sp_mr_erif_sublist_create(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_mr_tcam_erif_list *erif_list)
{
struct mlxsw_sp_mr_erif_sublist *erif_sublist;
int err;
erif_sublist = kzalloc(sizeof(*erif_sublist), GFP_KERNEL);
if (!erif_sublist)
return ERR_PTR(-ENOMEM);
err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_MCRIGR,
1, &erif_sublist->rigr2_kvdl_index);
if (err) {
kfree(erif_sublist);
return ERR_PTR(err);
}
list_add_tail(&erif_sublist->list, &erif_list->erif_sublists);
return erif_sublist;
}
static void
mlxsw_sp_mr_erif_sublist_destroy(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_mr_erif_sublist *erif_sublist)
{
list_del(&erif_sublist->list);
mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_MCRIGR,
1, erif_sublist->rigr2_kvdl_index);
kfree(erif_sublist);
}
static int
mlxsw_sp_mr_erif_list_add(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_mr_tcam_erif_list *erif_list,
u16 erif_index)
{
struct mlxsw_sp_mr_erif_sublist *sublist;
/* If either there is no erif_entry or the last one is full, allocate a
* new one.
*/
if (list_empty(&erif_list->erif_sublists)) {
sublist = mlxsw_sp_mr_erif_sublist_create(mlxsw_sp, erif_list);
if (IS_ERR(sublist))
return PTR_ERR(sublist);
erif_list->kvdl_index = sublist->rigr2_kvdl_index;
} else {
sublist = list_last_entry(&erif_list->erif_sublists,
struct mlxsw_sp_mr_erif_sublist,
list);
sublist->synced = false;
if (mlxsw_sp_mr_erif_sublist_full(mlxsw_sp, sublist)) {
sublist = mlxsw_sp_mr_erif_sublist_create(mlxsw_sp,
erif_list);
if (IS_ERR(sublist))
return PTR_ERR(sublist);
}
}
/* Add the eRIF to the last entry's last index */
sublist->erif_indices[sublist->num_erifs++] = erif_index;
return 0;
}
static void
mlxsw_sp_mr_erif_list_flush(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_mr_tcam_erif_list *erif_list)
{
struct mlxsw_sp_mr_erif_sublist *erif_sublist, *tmp;
list_for_each_entry_safe(erif_sublist, tmp, &erif_list->erif_sublists,
list)
mlxsw_sp_mr_erif_sublist_destroy(mlxsw_sp, erif_sublist);
}
static int
mlxsw_sp_mr_erif_list_commit(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_mr_tcam_erif_list *erif_list)
{
struct mlxsw_sp_mr_erif_sublist *curr_sublist;
char rigr2_pl[MLXSW_REG_RIGR2_LEN];
int err;
int i;
list_for_each_entry(curr_sublist, &erif_list->erif_sublists, list) {
if (curr_sublist->synced)
continue;
/* If the sublist is not the last one, pack the next index */
if (list_is_last(&curr_sublist->list,
&erif_list->erif_sublists)) {
mlxsw_reg_rigr2_pack(rigr2_pl,
curr_sublist->rigr2_kvdl_index,
false, 0);
} else {
struct mlxsw_sp_mr_erif_sublist *next_sublist;
next_sublist = list_next_entry(curr_sublist, list);
mlxsw_reg_rigr2_pack(rigr2_pl,
curr_sublist->rigr2_kvdl_index,
true,
next_sublist->rigr2_kvdl_index);
}
/* Pack all the erifs */
for (i = 0; i < curr_sublist->num_erifs; i++) {
u16 erif_index = curr_sublist->erif_indices[i];
mlxsw_reg_rigr2_erif_entry_pack(rigr2_pl, i, true,
erif_index);
}
/* Write the entry */
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rigr2),
rigr2_pl);
if (err)
/* No need of a rollback here because this
* hardware entry should not be pointed yet.
*/
return err;
curr_sublist->synced = true;
}
return 0;
}
static void mlxsw_sp_mr_erif_list_move(struct mlxsw_sp_mr_tcam_erif_list *to,
struct mlxsw_sp_mr_tcam_erif_list *from)
{
list_splice(&from->erif_sublists, &to->erif_sublists);
to->kvdl_index = from->kvdl_index;
}
struct mlxsw_sp_mr_tcam_route {
struct mlxsw_sp_mr_tcam_erif_list erif_list;
struct mlxsw_afa_block *afa_block;
u32 counter_index;
enum mlxsw_sp_mr_route_action action;
struct mlxsw_sp_mr_route_key key;
u16 irif_index;
u16 min_mtu;
void *priv;
};
static struct mlxsw_afa_block *
mlxsw_sp_mr_tcam_afa_block_create(struct mlxsw_sp *mlxsw_sp,
enum mlxsw_sp_mr_route_action route_action,
u16 irif_index, u32 counter_index,
u16 min_mtu,
struct mlxsw_sp_mr_tcam_erif_list *erif_list)
{
struct mlxsw_afa_block *afa_block;
int err;
afa_block = mlxsw_afa_block_create(mlxsw_sp->afa);
if (!afa_block)
return ERR_PTR(-ENOMEM);
err = mlxsw_afa_block_append_allocated_counter(afa_block,
counter_index);
if (err)
goto err;
switch (route_action) {
case MLXSW_SP_MR_ROUTE_ACTION_TRAP:
err = mlxsw_afa_block_append_trap(afa_block,
MLXSW_TRAP_ID_ACL1);
if (err)
goto err;
break;
case MLXSW_SP_MR_ROUTE_ACTION_TRAP_AND_FORWARD:
case MLXSW_SP_MR_ROUTE_ACTION_FORWARD:
/* If we are about to append a multicast router action, commit
* the erif_list.
*/
err = mlxsw_sp_mr_erif_list_commit(mlxsw_sp, erif_list);
if (err)
goto err;
err = mlxsw_afa_block_append_mcrouter(afa_block, irif_index,
min_mtu, false,
erif_list->kvdl_index);
if (err)
goto err;
if (route_action == MLXSW_SP_MR_ROUTE_ACTION_TRAP_AND_FORWARD) {
err = mlxsw_afa_block_append_trap_and_forward(afa_block,
MLXSW_TRAP_ID_ACL2);
if (err)
goto err;
}
break;
default:
err = -EINVAL;
goto err;
}
err = mlxsw_afa_block_commit(afa_block<
|