// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved */
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include "spectrum_mr_tcam.h"
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#include "reg.h"
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#include "spectrum.h"
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#include "core_acl_flex_actions.h"
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#include "spectrum_mr.h"
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struct mlxsw_sp_mr_tcam {
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void *priv;
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};
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/* This struct maps to one RIGR2 register entry */
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struct mlxsw_sp_mr_erif_sublist {
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struct list_head list;
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u32 rigr2_kvdl_index;
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int num_erifs;
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u16 erif_indices[MLXSW_REG_RIGR2_MAX_ERIFS];
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bool synced;
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};
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struct mlxsw_sp_mr_tcam_erif_list {
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struct list_head erif_sublists;
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u32 kvdl_index;
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};
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static bool
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mlxsw_sp_mr_erif_sublist_full(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_mr_erif_sublist *erif_sublist)
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{
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int erif_list_entries = MLXSW_CORE_RES_GET(mlxsw_sp->core,
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MC_ERIF_LIST_ENTRIES);
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return erif_sublist->num_erifs == erif_list_entries;
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}
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static void
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mlxsw_sp_mr_erif_list_init(struct mlxsw_sp_mr_tcam_erif_list *erif_list)
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{
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INIT_LIST_HEAD(&erif_list->erif_sublists);
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}
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static struct mlxsw_sp_mr_erif_sublist *
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mlxsw_sp_mr_erif_sublist_create(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_mr_tcam_erif_list *erif_list)
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{
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struct mlxsw_sp_mr_erif_sublist *erif_sublist;
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int err;
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erif_sublist = kzalloc(sizeof(*erif_sublist), GFP_KERNEL);
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if (!erif_sublist)
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return ERR_PTR(-ENOMEM);
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err = mlxsw_sp_kvdl_alloc(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_MCRIGR,
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1, &erif_sublist->rigr2_kvdl_index);
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if (err) {
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kfree(erif_sublist);
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return ERR_PTR(err);
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}
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list_add_tail(&erif_sublist->list, &erif_list->erif_sublists);
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return erif_sublist;
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}
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static void
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mlxsw_sp_mr_erif_sublist_destroy(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_mr_erif_sublist *erif_sublist)
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{
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list_del(&erif_sublist->list);
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mlxsw_sp_kvdl_free(mlxsw_sp, MLXSW_SP_KVDL_ENTRY_TYPE_MCRIGR,
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1, erif_sublist->rigr2_kvdl_index);
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kfree(erif_sublist);
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}
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static int
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mlxsw_sp_mr_erif_list_add(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_mr_tcam_erif_list *erif_list,
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u16 erif_index)
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{
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struct mlxsw_sp_mr_erif_sublist *sublist;
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/* If either there is no erif_entry or the last one is full, allocate a
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* new one.
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*/
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if (list_empty(&erif_list->erif_sublists)) {
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sublist = mlxsw_sp_mr_erif_sublist_create(mlxsw_sp, erif_list);
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if (IS_ERR(sublist))
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return PTR_ERR(sublist);
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erif_list->kvdl_index = sublist->rigr2_kvdl_index;
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} else {
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sublist = list_last_entry(&erif_list->erif_sublists,
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struct mlxsw_sp_mr_erif_sublist,
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list);
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sublist->synced = false;
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if (mlxsw_sp_mr_erif_sublist_full(mlxsw_sp, sublist)) {
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sublist = mlxsw_sp_mr_erif_sublist_create(mlxsw_sp,
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erif_list);
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if (IS_ERR(sublist))
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return PTR_ERR(sublist);
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}
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}
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/* Add the eRIF to the last entry's last index */
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sublist->erif_indices[sublist->num_erifs++] = erif_index;
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return 0;
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}
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static void
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mlxsw_sp_mr_erif_list_flush(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_mr_tcam_erif_list *erif_list)
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{
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struct mlxsw_sp_mr_erif_sublist *erif_sublist, *tmp;
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list_for_each_entry_safe(erif_sublist, tmp, &erif_list->erif_sublists,
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list)
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mlxsw_sp_mr_erif_sublist_destroy(mlxsw_sp, erif_sublist);
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}
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static int
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mlxsw_sp_mr_erif_list_commit(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_mr_tcam_erif_list *erif_list)
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{
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struct mlxsw_sp_mr_erif_sublist *curr_sublist;
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char rigr2_pl[MLXSW_REG_RIGR2_LEN];
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int err;
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int i;
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list_for_each_entry(curr_sublist, &erif_list->erif_sublists, list) {
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if (curr_sublist->synced)
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continue;
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/* If the sublist is not the last one, pack the next index */
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if (list_is_last(&curr_sublist->list,
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&erif_list->erif_sublists)) {
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mlxsw_reg_rigr2_pack(rigr2_pl,
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curr_sublist->rigr2_kvdl_index,
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false, 0);
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} else {
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struct mlxsw_sp_mr_erif_sublist *next_sublist;
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next_sublist = list_next_entry(curr_sublist, list);
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mlxsw_reg_rigr2_pack(rigr2_pl,
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curr_sublist->rigr2_kvdl_index,
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true,
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next_sublist->rigr2_kvdl_index);
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}
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/* Pack all the erifs */
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for (i = 0; i < curr_sublist->num_erifs; i++) {
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u16 erif_index = curr_sublist->erif_indices[i];
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mlxsw_reg_rigr2_erif_entry_pack(rigr2_pl, i, true,
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erif_index);
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}
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/* Write the entry */
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err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(rigr2),
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rigr2_pl);
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if (err)
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/* No need of a rollback here because this
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* hardware entry should not be pointed yet.
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*/
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return err;
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curr_sublist->synced = true;
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}
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return 0;
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}
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static void mlxsw_sp_mr_erif_list_move(struct mlxsw_sp_mr_tcam_erif_list *to,
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struct mlxsw_sp_mr_tcam_erif_list *from)
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{
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list_splice(&from->erif_sublists, &to->erif_sublists);
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to->kvdl_index = from->kvdl_index;
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}
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struct mlxsw_sp_mr_tcam_route {
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struct mlxsw_sp_mr_tcam_erif_list erif_list;
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struct mlxsw_afa_block *afa_block;
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u32 counter_index;
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enum mlxsw_sp_mr_route_action action;
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struct mlxsw_sp_mr_route_key key;
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u16 irif_index;
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u16 min_mtu;
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void *priv;
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};
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static struct mlxsw_afa_block *
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mlxsw_sp_mr_tcam_afa_block_create(struct mlxsw_sp *mlxsw_sp,
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enum mlxsw_sp_mr_route_action route_action,
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u16 irif_index, u32 counter_index,
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u16 min_mtu,
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struct mlxsw_sp_mr_tcam_erif_list *erif_list)
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{
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struct mlxsw_afa_block *afa_block;
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int err;
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afa_block = mlxsw_afa_block_create(mlxsw_sp->afa);
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if (IS_ERR(afa_block))
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return afa_block;
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err = mlxsw_afa_block_append_allocated_counter(afa_block,
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counter_index);
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if (err)
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goto err;
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switch (route_action) {
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case MLXSW_SP_MR_ROUTE_ACTION_TRAP:
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err = mlxsw_afa_block_append_trap(afa_block,
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MLXSW_TRAP_ID_ACL1);
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if (err)
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goto err;
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break;
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case MLXSW_SP_MR_ROUTE_ACTION_TRAP_AND_FORWARD:
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case MLXSW_SP_MR_ROUTE_ACTION_FORWARD:
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/* If we are about to append a multicast router action, commit
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* the erif_list.
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*/
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err = mlxsw_sp_mr_erif_list_commit(mlxsw_sp, erif_list);
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if (err)
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goto err;
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err = mlxsw_afa_block_append_mcrouter(afa_block, irif_index,
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min_mtu, false,
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erif_list->kvdl_index);
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if (err)
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goto err;
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if (route_action == MLXSW_SP_MR_ROUTE_ACTION_TRAP_AND_FORWARD) {
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err = mlxsw_afa_block_append_trap_and_forward(afa_block,
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MLXSW_TRAP_ID_ACL2);
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if (err)
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goto err;
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}
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break;
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default:
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err = -EINVAL;
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goto err;
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}
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err = mlxsw_afa_block_commit(afa_block);
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if (err)
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goto err;
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return afa_block;
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err:
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mlxsw_afa_block_destroy(afa_block);
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return ERR_PTR(err);
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}
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static void
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mlxsw_sp_mr_tcam_afa_block_destroy(struct mlxsw_afa_block *afa_block)
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{
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mlxsw_afa_block_destroy(afa_block);
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}
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static int
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mlxsw_sp_mr_tcam_erif_populate(struct mlxsw_sp *mlxsw_sp,
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struct mlxsw_sp_mr_tcam_erif_list *erif_list,
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struct mlxsw_sp_mr_route_info *route_info)
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{
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int err;
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int i;
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for (i = 0; i < route_info->erif_num; i++) {
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u16 erif_index = route_info->erif_indices[i];
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err = mlxsw_sp_mr_erif_list_add(mlxsw_sp, erif_list,
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erif_index);
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if (err)
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return err;
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}
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return 0;
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}
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static int
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mlxsw_sp_mr_tcam_route_create(struct mlxsw_sp *mlxsw_sp, void *priv,
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void *route_priv,
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struct mlxsw_sp_mr_route_params *route_params)
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{
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const struct mlxsw_sp_mr_tcam_ops *ops = mlxsw_sp->mr_tcam_ops;
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struct mlxsw_sp_mr_tcam_route *route = route_priv;
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struct mlxsw_sp_mr_tcam *mr_tcam = priv;
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int err;
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route->key = route_params->key;
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route->irif_index = route_params->value.irif_index;
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route->min_mtu = route_params->value.min_mtu;
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route->action = route_params->value.route_action;
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/* Create the egress RIFs list */
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mlxsw_sp_mr_erif_list_init(&route->erif_list);
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err = mlxsw_sp_mr_tcam_erif_populate(mlxsw_sp, &route->erif_list,
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&route_params->value);
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if (err)
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goto err_erif_populate;
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/* Create the flow counter */
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err = mlxsw_sp_flow_counter_alloc(mlxsw_sp, &route->counter_index);
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if (err)
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goto err_counter_alloc;
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/* Create the flexible action block */
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route->afa_block = mlxsw_sp_mr_tcam_afa_block_create(mlxsw_sp,
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route->action,
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route->irif_index,
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route->counter_index,
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route->min_mtu,
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&route->erif_list);
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if (IS_ERR(route->afa_block)) {
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err = PTR_ERR(route->afa_block);
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goto err_afa_block_create;
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}
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route->priv = kzalloc(ops->route_priv_size, GFP_KERNEL);
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if (!route->priv) {
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err = -ENOMEM;
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goto err_route_priv_alloc;
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}
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/* Write the route to the TCAM */
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err = ops->route_create(mlxsw_sp, mr_tcam->priv, route->priv,
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&route->key, route->afa_block,
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route_params->prio);
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if (err)
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goto err_route_create;
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return 0;
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err_route_create:
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kfree(route->priv);
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err_route_priv_alloc:
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mlxsw_sp_mr_tcam_afa_block_destroy(route->afa_block);
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err_afa_block_create:
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mlxsw_sp_flow_counter_free(mlxsw_sp, route->counter_index);
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err_erif_populate:
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err_counter_alloc:
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mlxsw_sp_mr_erif_list_flush(mlxsw_sp, &route->erif_list);
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return err;
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}
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static void mlxsw_sp_mr_tcam_route_destroy(struct mlxsw_sp *mlxsw_sp,
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void *priv, void *route_priv)
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{
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const struct mlxsw_sp_mr_tcam_ops *ops = mlxsw_sp->mr_tcam_ops;
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struct mlxsw_sp_mr_tcam_route *route = route_priv;
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struct mlxsw_sp_mr_tcam *mr_tcam = priv;
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ops->route_destroy(mlxsw_sp, mr_tcam->priv, route->priv, &route->key);
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kfree(route->priv);
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mlxsw_sp_mr_tcam_afa_block_destroy(route->afa_block);
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mlxsw_sp_flow_counter_free(mlxsw_sp, route->counter_index);
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mlxsw_sp_mr_erif_list_flush(mlxsw_sp, &route->erif_list);
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}
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static int mlxsw_sp_mr_tcam_route_stats(struct mlxsw_sp *mlxsw_sp,
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void *route_priv, u64 *packets,
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u64 *bytes)
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{
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struct mlxsw_sp_mr_tcam_route *route = route_priv;
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|
return mlxsw_sp_flow_counter_get(mlxsw_sp, route->counter_index,
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packets, bytes);
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}
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static int
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mlxsw_sp_mr_tcam_route_action_update(struct mlxsw_sp *mlxsw_sp,
|
void *route_priv,
|
enum mlxsw_sp_mr_route_action route_action)
|
{
|
const struct mlxsw_sp_mr_tcam_ops *ops = mlxsw_sp->mr_tcam_ops;
|
struct mlxsw_sp_mr_tcam_route *route = route_priv;
|
struct mlxsw_afa_block *afa_block;
|
int err;
|
|
/* Create a new flexible action block */
|
afa_block = mlxsw_sp_mr_tcam_afa_block_create(mlxsw_sp, route_action,
|
route->irif_index,
|
route->counter_index,
|
route->min_mtu,
|
&route->erif_list);
|
if (IS_ERR(afa_block))
|
return PTR_ERR(afa_block);
|
|
/* Update the TCAM route entry */
|
err = ops->route_update(mlxsw_sp, route->priv, &route->key, afa_block);
|
if (err)
|
goto err;
|
|
/* Delete the old one */
|
mlxsw_sp_mr_tcam_afa_block_destroy(route->afa_block);
|
route->afa_block = afa_block;
|
route->action = route_action;
|
return 0;
|
err:
|
mlxsw_sp_mr_tcam_afa_block_destroy(afa_block);
|
return err;
|
}
|
|
static int mlxsw_sp_mr_tcam_route_min_mtu_update(struct mlxsw_sp *mlxsw_sp,
|
void *route_priv, u16 min_mtu)
|
{
|
const struct mlxsw_sp_mr_tcam_ops *ops = mlxsw_sp->mr_tcam_ops;
|
struct mlxsw_sp_mr_tcam_route *route = route_priv;
|
struct mlxsw_afa_block *afa_block;
|
int err;
|
|
/* Create a new flexible action block */
|
afa_block = mlxsw_sp_mr_tcam_afa_block_create(mlxsw_sp,
|
route->action,
|
route->irif_index,
|
route->counter_index,
|
min_mtu,
|
&route->erif_list);
|
if (IS_ERR(afa_block))
|
return PTR_ERR(afa_block);
|
|
/* Update the TCAM route entry */
|
err = ops->route_update(mlxsw_sp, route->priv, &route->key, afa_block);
|
if (err)
|
goto err;
|
|
/* Delete the old one */
|
mlxsw_sp_mr_tcam_afa_block_destroy(route->afa_block);
|
route->afa_block = afa_block;
|
route->min_mtu = min_mtu;
|
return 0;
|
err:
|
mlxsw_sp_mr_tcam_afa_block_destroy(afa_block);
|
return err;
|
}
|
|
static int mlxsw_sp_mr_tcam_route_irif_update(struct mlxsw_sp *mlxsw_sp,
|
void *route_priv, u16 irif_index)
|
{
|
struct mlxsw_sp_mr_tcam_route *route = route_priv;
|
|
if (route->action != MLXSW_SP_MR_ROUTE_ACTION_TRAP)
|
return -EINVAL;
|
route->irif_index = irif_index;
|
return 0;
|
}
|
|
static int mlxsw_sp_mr_tcam_route_erif_add(struct mlxsw_sp *mlxsw_sp,
|
void *route_priv, u16 erif_index)
|
{
|
struct mlxsw_sp_mr_tcam_route *route = route_priv;
|
int err;
|
|
err = mlxsw_sp_mr_erif_list_add(mlxsw_sp, &route->erif_list,
|
erif_index);
|
if (err)
|
return err;
|
|
/* Commit the action only if the route action is not TRAP */
|
if (route->action != MLXSW_SP_MR_ROUTE_ACTION_TRAP)
|
return mlxsw_sp_mr_erif_list_commit(mlxsw_sp,
|
&route->erif_list);
|
return 0;
|
}
|
|
static int mlxsw_sp_mr_tcam_route_erif_del(struct mlxsw_sp *mlxsw_sp,
|
void *route_priv, u16 erif_index)
|
{
|
const struct mlxsw_sp_mr_tcam_ops *ops = mlxsw_sp->mr_tcam_ops;
|
struct mlxsw_sp_mr_tcam_route *route = route_priv;
|
struct mlxsw_sp_mr_erif_sublist *erif_sublist;
|
struct mlxsw_sp_mr_tcam_erif_list erif_list;
|
struct mlxsw_afa_block *afa_block;
|
int err;
|
int i;
|
|
/* Create a copy of the original erif_list without the deleted entry */
|
mlxsw_sp_mr_erif_list_init(&erif_list);
|
list_for_each_entry(erif_sublist, &route->erif_list.erif_sublists, list) {
|
for (i = 0; i < erif_sublist->num_erifs; i++) {
|
u16 curr_erif = erif_sublist->erif_indices[i];
|
|
if (curr_erif == erif_index)
|
continue;
|
err = mlxsw_sp_mr_erif_list_add(mlxsw_sp, &erif_list,
|
curr_erif);
|
if (err)
|
goto err_erif_list_add;
|
}
|
}
|
|
/* Create the flexible action block pointing to the new erif_list */
|
afa_block = mlxsw_sp_mr_tcam_afa_block_create(mlxsw_sp, route->action,
|
route->irif_index,
|
route->counter_index,
|
route->min_mtu,
|
&erif_list);
|
if (IS_ERR(afa_block)) {
|
err = PTR_ERR(afa_block);
|
goto err_afa_block_create;
|
}
|
|
/* Update the TCAM route entry */
|
err = ops->route_update(mlxsw_sp, route->priv, &route->key, afa_block);
|
if (err)
|
goto err_route_write;
|
|
mlxsw_sp_mr_tcam_afa_block_destroy(route->afa_block);
|
mlxsw_sp_mr_erif_list_flush(mlxsw_sp, &route->erif_list);
|
route->afa_block = afa_block;
|
mlxsw_sp_mr_erif_list_move(&route->erif_list, &erif_list);
|
return 0;
|
|
err_route_write:
|
mlxsw_sp_mr_tcam_afa_block_destroy(afa_block);
|
err_afa_block_create:
|
err_erif_list_add:
|
mlxsw_sp_mr_erif_list_flush(mlxsw_sp, &erif_list);
|
return err;
|
}
|
|
static int
|
mlxsw_sp_mr_tcam_route_update(struct mlxsw_sp *mlxsw_sp, void *route_priv,
|
struct mlxsw_sp_mr_route_info *route_info)
|
{
|
const struct mlxsw_sp_mr_tcam_ops *ops = mlxsw_sp->mr_tcam_ops;
|
struct mlxsw_sp_mr_tcam_route *route = route_priv;
|
struct mlxsw_sp_mr_tcam_erif_list erif_list;
|
struct mlxsw_afa_block *afa_block;
|
int err;
|
|
/* Create a new erif_list */
|
mlxsw_sp_mr_erif_list_init(&erif_list);
|
err = mlxsw_sp_mr_tcam_erif_populate(mlxsw_sp, &erif_list, route_info);
|
if (err)
|
goto err_erif_populate;
|
|
/* Create the flexible action block pointing to the new erif_list */
|
afa_block = mlxsw_sp_mr_tcam_afa_block_create(mlxsw_sp,
|
route_info->route_action,
|
route_info->irif_index,
|
route->counter_index,
|
route_info->min_mtu,
|
&erif_list);
|
if (IS_ERR(afa_block)) {
|
err = PTR_ERR(afa_block);
|
goto err_afa_block_create;
|
}
|
|
/* Update the TCAM route entry */
|
err = ops->route_update(mlxsw_sp, route->priv, &route->key, afa_block);
|
if (err)
|
goto err_route_write;
|
|
mlxsw_sp_mr_tcam_afa_block_destroy(route->afa_block);
|
mlxsw_sp_mr_erif_list_flush(mlxsw_sp, &route->erif_list);
|
route->afa_block = afa_block;
|
mlxsw_sp_mr_erif_list_move(&route->erif_list, &erif_list);
|
route->action = route_info->route_action;
|
route->irif_index = route_info->irif_index;
|
route->min_mtu = route_info->min_mtu;
|
return 0;
|
|
err_route_write:
|
mlxsw_sp_mr_tcam_afa_block_destroy(afa_block);
|
err_afa_block_create:
|
err_erif_populate:
|
mlxsw_sp_mr_erif_list_flush(mlxsw_sp, &erif_list);
|
return err;
|
}
|
|
static int mlxsw_sp_mr_tcam_init(struct mlxsw_sp *mlxsw_sp, void *priv)
|
{
|
const struct mlxsw_sp_mr_tcam_ops *ops = mlxsw_sp->mr_tcam_ops;
|
struct mlxsw_sp_mr_tcam *mr_tcam = priv;
|
int err;
|
|
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MC_ERIF_LIST_ENTRIES))
|
return -EIO;
|
|
mr_tcam->priv = kzalloc(ops->priv_size, GFP_KERNEL);
|
if (!mr_tcam->priv)
|
return -ENOMEM;
|
|
err = ops->init(mlxsw_sp, mr_tcam->priv);
|
if (err)
|
goto err_init;
|
return 0;
|
|
err_init:
|
kfree(mr_tcam->priv);
|
return err;
|
}
|
|
static void mlxsw_sp_mr_tcam_fini(struct mlxsw_sp *mlxsw_sp, void *priv)
|
{
|
const struct mlxsw_sp_mr_tcam_ops *ops = mlxsw_sp->mr_tcam_ops;
|
struct mlxsw_sp_mr_tcam *mr_tcam = priv;
|
|
ops->fini(mr_tcam->priv);
|
kfree(mr_tcam->priv);
|
}
|
|
const struct mlxsw_sp_mr_ops mlxsw_sp_mr_tcam_ops = {
|
.priv_size = sizeof(struct mlxsw_sp_mr_tcam),
|
.route_priv_size = sizeof(struct mlxsw_sp_mr_tcam_route),
|
.init = mlxsw_sp_mr_tcam_init,
|
.route_create = mlxsw_sp_mr_tcam_route_create,
|
.route_update = mlxsw_sp_mr_tcam_route_update,
|
.route_stats = mlxsw_sp_mr_tcam_route_stats,
|
.route_action_update = mlxsw_sp_mr_tcam_route_action_update,
|
.route_min_mtu_update = mlxsw_sp_mr_tcam_route_min_mtu_update,
|
.route_irif_update = mlxsw_sp_mr_tcam_route_irif_update,
|
.route_erif_add = mlxsw_sp_mr_tcam_route_erif_add,
|
.route_erif_del = mlxsw_sp_mr_tcam_route_erif_del,
|
.route_destroy = mlxsw_sp_mr_tcam_route_destroy,
|
.fini = mlxsw_sp_mr_tcam_fini,
|
};
|
