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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2020 Marvell International Ltd. All rights reserved */
#include <linux/kernel.h>
#include <linux/list.h>
#include "prestera.h"
#include "prestera_acl.h"
#include "prestera_flow.h"
#include "prestera_span.h"
#include "prestera_flower.h"
static LIST_HEAD(prestera_block_cb_list);
static int prestera_flow_block_mall_cb(struct prestera_flow_block *block,
struct tc_cls_matchall_offload *f)
{
switch (f->command) {
case TC_CLSMATCHALL_REPLACE:
return prestera_span_replace(block, f);
case TC_CLSMATCHALL_DESTROY:
prestera_span_destroy(block);
return 0;
default:
return -EOPNOTSUPP;
}
}
static int prestera_flow_block_flower_cb(struct prestera_flow_block *block,
struct flow_cls_offload *f)
{
if (f->common.chain_index != 0)
return -EOPNOTSUPP;
switch (f->command) {
case FLOW_CLS_REPLACE:
return prestera_flower_replace(block, f);
case FLOW_CLS_DESTROY:
prestera_flower_destroy(block, f);
return 0;
case FLOW_CLS_STATS:
return prestera_flower_stats(block, f);
default:
return -EOPNOTSUPP;
}
}
static int prestera_flow_block_cb(enum tc_setup_type type,
void *type_data, void *cb_priv)
{
struct prestera_flow_block *block = cb_priv;
switch (type) {
case TC_SETUP_CLSFLOWER:
return prestera_flow_block_flower_cb(block, type_data);
case TC_SETUP_CLSMATCHALL:
return prestera_flow_block_mall_cb(block, type_data);
default:
return -EOPNOTSUPP;
}
}
static void prestera_flow_block_release(void *cb_priv)
{
struct prestera_flow_block *block = cb_priv;
prestera_acl_block_destroy(block);
}
static struct prestera_flow_block *
prestera_flow_block_get(struct prestera_switch *sw,
struct flow_block_offload *f,
bool *register_block)
{
struct prestera_flow_block *block;
struct flow_block_cb *block_cb;
block_cb = flow_block_cb_lookup(f->block,
prestera_flow_block_cb, sw);
if (!block_cb) {
block = prestera_acl_block_create(sw, f->net);
if (!block)
return ERR_PTR(-ENOMEM);
block_cb = flow_block_cb_alloc(prestera_flow_block_cb,
sw, block,
prestera_flow_block_release);
if (IS_ERR(block_cb)) {
prestera_acl_block_destroy(block);
return ERR_CAST(block_cb);
}
block->block_cb = block_cb;
*register_block = true;
} else {
block = flow_block_cb_priv(block_cb);
*register_block = false;
}
flow_block_cb_incref(block_cb);
return block;
}
static void prestera_flow_block_put(struct prestera_flow_block *block)
{
struct flow_block_cb *block_cb = block->block_cb;
if (flow_block_cb_decref(block_cb))
return;
flow_block_cb_free(block_cb);
prestera_acl_block_destroy(block);
}
static int prestera_setup_flow_block_bind(struct prestera_port *port,
struct flow_block_offload *f)
{
struct prestera_switch *sw = port->sw;
struct prestera_flow_block *block;
struct flow_block_cb *block_cb;
bool register_block;
int err;
block = prestera_flow_block_get(sw, f, ®ister_block);
if (IS_ERR(block))
return PTR_ERR(block);
block_cb = block->block_cb;
err = prestera_acl_block_bind(block, port);
if (err)
goto err_block_bind;
if (register_block) {
flow_block_cb_add(block_cb, f);
list_add_tail(&block_cb->driver_list, &prestera_block_cb_list);
}
port->flow_block = block;
return 0;
err_block_bind:
prestera_flow_block_put(block);
return err;
}
static void prestera_setup_flow_block_unbind(struct prestera_port *port,
struct flow_block_offload *f)
{
struct prestera_switch *sw = port->sw;
struct prestera_flow_block *block;
struct flow_block_cb *block_cb;
int err;
block_cb = flow_block_cb_lookup(f->block, prestera_flow_block_cb, sw);
if (!block_cb)
return;
block = flow_block_cb_priv(block_cb);
prestera_span_destroy(block);
err = prestera_acl_block_unbind(block, port);
if (err)
goto error;
if (!flow_block_cb_decref(block_cb)) {
flow_block_cb_remove(block_cb, f);
list_del(&block_cb->driver_list);
}
error:
port->flow_block = NULL;
}
int prestera_flow_block_setup(struct prestera_port *port,
struct flow_block_offload *f)
{
if (f->binder_type != FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
return -EOPNOTSUPP;
f->driver_block_list = &prestera_block_cb_list;
switch (f->command) {
case FLOW_BLOCK_BIND:
return prestera_setup_flow_block_bind(port, f);
case FLOW_BLOCK_UNBIND:
prestera_setup_flow_block_unbind(port, f);
return 0;
default:
return -EOPNOTSUPP;
}
}
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