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// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2019 Solarflare Communications Inc.
* Copyright 2020-2022 Xilinx Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#include "tc.h"
#include "mae.h"
#include "ef100_rep.h"
static void efx_tc_free_action_set(struct efx_nic *efx,
struct efx_tc_action_set *act, bool in_hw)
{
/* Failure paths calling this on the 'running action' set in_hw=false,
* because if the alloc had succeeded we'd've put it in acts.list and
* not still have it in act.
*/
if (in_hw) {
efx_mae_free_action_set(efx, act->fw_id);
/* in_hw is true iff we are on an acts.list; make sure to
* remove ourselves from that list before we are freed.
*/
list_del(&act->list);
}
kfree(act);
}
static void efx_tc_free_action_set_list(struct efx_nic *efx,
struct efx_tc_action_set_list *acts,
bool in_hw)
{
struct efx_tc_action_set *act, *next;
/* Failure paths set in_hw=false, because usually the acts didn't get
* to efx_mae_alloc_action_set_list(); if they did, the failure tree
* has a separate efx_mae_free_action_set_list() before calling us.
*/
if (in_hw)
efx_mae_free_action_set_list(efx, acts);
/* Any act that's on the list will be in_hw even if the list isn't */
list_for_each_entry_safe(act, next, &acts->list, list)
efx_tc_free_action_set(efx, act, true);
/* Don't kfree, as acts is embedded inside a struct efx_tc_flow_rule */
}
static void efx_tc_delete_rule(struct efx_nic *efx, struct efx_tc_flow_rule *rule)
{
efx_mae_delete_rule(efx, rule->fw_id);
/* Release entries in subsidiary tables */
efx_tc_free_action_set_list(efx, &rule->acts, true);
rule->fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL;
}
static int efx_tc_configure_default_rule(struct efx_nic *efx, u32 ing_port,
u32 eg_port, struct efx_tc_flow_rule *rule)
{
struct efx_tc_action_set_list *acts = &rule->acts;
struct efx_tc_match *match = &rule->match;
struct efx_tc_action_set *act;
int rc;
match->value.ingress_port = ing_port;
match->mask.ingress_port = ~0;
act = kzalloc(sizeof(*act), GFP_KERNEL);
if (!act)
return -ENOMEM;
act->deliver = 1;
act->dest_mport = eg_port;
rc = efx_mae_alloc_action_set(efx, act);
if (rc)
goto fail1;
EFX_WARN_ON_PARANOID(!list_empty(&acts->list));
list_add_tail(&act->list, &acts->list);
rc = efx_mae_alloc_action_set_list(efx, acts);
if (rc)
goto fail2;
rc = efx_mae_insert_rule(efx, match, EFX_TC_PRIO_DFLT,
acts->fw_id, &rule->fw_id);
if (rc)
goto fail3;
return 0;
fail3:
efx_mae_free_action_set_list(efx, acts);
fail2:
list_del(&act->list);
efx_mae_free_action_set(efx, act->fw_id);
fail1:
kfree(act);
return rc;
}
static int efx_tc_configure_default_rule_pf(struct efx_nic *efx)
{
struct efx_tc_flow_rule *rule = &efx->tc->dflt.pf;
u32 ing_port, eg_port;
efx_mae_mport_uplink(efx, &ing_port);
efx_mae_mport_wire(efx, &eg_port);
return efx_tc_configure_default_rule(efx, ing_port, eg_port, rule);
}
static int efx_tc_configure_default_rule_wire(struct efx_nic *efx)
{
struct efx_tc_flow_rule *rule = &efx->tc->dflt.wire;
u32 ing_port, eg_port;
efx_mae_mport_wire(efx, &ing_port);
efx_mae_mport_uplink(efx, &eg_port);
return efx_tc_configure_default_rule(efx, ing_port, eg_port, rule);
}
int efx_tc_configure_default_rule_rep(struct efx_rep *efv)
{
struct efx_tc_flow_rule *rule = &efv->dflt;
struct efx_nic *efx = efv->parent;
u32 ing_port, eg_port;
efx_mae_mport_mport(efx, efv->mport, &ing_port);
efx_mae_mport_uplink(efx, &eg_port);
return efx_tc_configure_default_rule(efx, ing_port, eg_port, rule);
}
void efx_tc_deconfigure_default_rule(struct efx_nic *efx,
struct efx_tc_flow_rule *rule)
{
if (rule->fw_id != MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL)
efx_tc_delete_rule(efx, rule);
rule->fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL;
}
int efx_init_tc(struct efx_nic *efx)
{
int rc;
rc = efx_tc_configure_default_rule_pf(efx);
if (rc)
return rc;
return efx_tc_configure_default_rule_wire(efx);
}
void efx_fini_tc(struct efx_nic *efx)
{
/* We can get called even if efx_init_struct_tc() failed */
if (!efx->tc)
return;
efx_tc_deconfigure_default_rule(efx, &efx->tc->dflt.pf);
efx_tc_deconfigure_default_rule(efx, &efx->tc->dflt.wire);
}
int efx_init_struct_tc(struct efx_nic *efx)
{
if (efx->type->is_vf)
return 0;
efx->tc = kzalloc(sizeof(*efx->tc), GFP_KERNEL);
if (!efx->tc)
return -ENOMEM;
INIT_LIST_HEAD(&efx->tc->dflt.pf.acts.list);
efx->tc->dflt.pf.fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL;
INIT_LIST_HEAD(&efx->tc->dflt.wire.acts.list);
efx->tc->dflt.wire.fw_id = MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL;
return 0;
}
void efx_fini_struct_tc(struct efx_nic *efx)
{
if (!efx->tc)
return;
EFX_WARN_ON_PARANOID(efx->tc->dflt.pf.fw_id !=
MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL);
EFX_WARN_ON_PARANOID(efx->tc->dflt.wire.fw_id !=
MC_CMD_MAE_ACTION_RULE_INSERT_OUT_ACTION_RULE_ID_NULL);
kfree(efx->tc);
efx->tc = NULL;
}
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