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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2019-2021 Marvell International Ltd. All rights reserved */
#include <linux/rhashtable.h>
#include "prestera.h"
#include "prestera_hw.h"
#include "prestera_router_hw.h"
#include "prestera_acl.h"
/* +--+
* +------->|vr|
* | +--+
* |
* +-+-------+
* |rif_entry|
* +---------+
* Rif is
* used as
* entry point
* for vr in hw
*/
int prestera_router_hw_init(struct prestera_switch *sw)
{
INIT_LIST_HEAD(&sw->router->vr_list);
INIT_LIST_HEAD(&sw->router->rif_entry_list);
return 0;
}
static struct prestera_vr *__prestera_vr_find(struct prestera_switch *sw,
u32 tb_id)
{
struct prestera_vr *vr;
list_for_each_entry(vr, &sw->router->vr_list, router_node) {
if (vr->tb_id == tb_id)
return vr;
}
return NULL;
}
static struct prestera_vr *__prestera_vr_create(struct prestera_switch *sw,
u32 tb_id,
struct netlink_ext_ack *extack)
{
struct prestera_vr *vr;
u16 hw_vr_id;
int err;
err = prestera_hw_vr_create(sw, &hw_vr_id);
if (err)
return ERR_PTR(-ENOMEM);
vr = kzalloc(sizeof(*vr), GFP_KERNEL);
if (!vr) {
err = -ENOMEM;
goto err_alloc_vr;
}
vr->tb_id = tb_id;
vr->hw_vr_id = hw_vr_id;
list_add(&vr->router_node, &sw->router->vr_list);
return vr;
err_alloc_vr:
prestera_hw_vr_delete(sw, hw_vr_id);
kfree(vr);
return ERR_PTR(err);
}
static void __prestera_vr_destroy(struct prestera_switch *sw,
struct prestera_vr *vr)
{
prestera_hw_vr_delete(sw, vr->hw_vr_id);
list_del(&vr->router_node);
kfree(vr);
}
static struct prestera_vr *prestera_vr_get(struct prestera_switch *sw, u32 tb_id,
struct netlink_ext_ack *extack)
{
struct prestera_vr *vr;
vr = __prestera_vr_find(sw, tb_id);
if (!vr)
vr = __prestera_vr_create(sw, tb_id, extack);
if (IS_ERR(vr))
return ERR_CAST(vr);
return vr;
}
static void prestera_vr_put(struct prestera_switch *sw, struct prestera_vr *vr)
{
if (!vr->ref_cnt)
__prestera_vr_destroy(sw, vr);
}
/* iface is overhead struct. vr_id also can be removed. */
static int
__prestera_rif_entry_key_copy(const struct prestera_rif_entry_key *in,
struct prestera_rif_entry_key *out)
{
memset(out, 0, sizeof(*out));
switch (in->iface.type) {
case PRESTERA_IF_PORT_E:
out->iface.dev_port.hw_dev_num = in->iface.dev_port.hw_dev_num;
out->iface.dev_port.port_num = in->iface.dev_port.port_num;
break;
case PRESTERA_IF_LAG_E:
out->iface.lag_id = in->iface.lag_id;
break;
case PRESTERA_IF_VID_E:
out->iface.vlan_id = in->iface.vlan_id;
break;
default:
pr_err("Unsupported iface type");
return -EINVAL;
}
out->iface.type = in->iface.type;
return 0;
}
struct prestera_rif_entry *
prestera_rif_entry_find(const struct prestera_switch *sw,
const struct prestera_rif_entry_key *k)
{
struct prestera_rif_entry *rif_entry;
struct prestera_rif_entry_key lk; /* lookup key */
if (__prestera_rif_entry_key_copy(k, &lk))
return NULL;
list_for_each_entry(rif_entry, &sw->router->rif_entry_list,
router_node) {
if (!memcmp(k, &rif_entry->key, sizeof(*k)))
return rif_entry;
}
return NULL;
}
void prestera_rif_entry_destroy(struct prestera_switch *sw,
struct prestera_rif_entry *e)
{
struct prestera_iface iface;
list_del(&e->router_node);
memcpy(&iface, &e->key.iface, sizeof(iface));
iface.vr_id = e->vr->hw_vr_id;
prestera_hw_rif_delete(sw, e->hw_id, &iface);
e->vr->ref_cnt--;
prestera_vr_put(sw, e->vr);
kfree(e);
}
struct prestera_rif_entry *
prestera_rif_entry_create(struct prestera_switch *sw,
struct prestera_rif_entry_key *k,
u32 tb_id, const unsigned char *addr)
{
int err;
struct prestera_rif_entry *e;
struct prestera_iface iface;
e = kzalloc(sizeof(*e), GFP_KERNEL);
if (!e)
goto err_kzalloc;
if (__prestera_rif_entry_key_copy(k, &e->key))
goto err_key_copy;
e->vr = prestera_vr_get(sw, tb_id, NULL);
if (IS_ERR(e->vr))
goto err_vr_get;
e->vr->ref_cnt++;
memcpy(&e->addr, addr, sizeof(e->addr));
/* HW */
memcpy(&iface, &e->key.iface, sizeof(iface));
iface.vr_id = e->vr->hw_vr_id;
err = prestera_hw_rif_create(sw, &iface, e->addr, &e->hw_id);
if (err)
goto err_hw_create;
list_add(&e->router_node, &sw->router->rif_entry_list);
return e;
err_hw_create:
e->vr->ref_cnt--;
prestera_vr_put(sw, e->vr);
err_vr_get:
err_key_copy:
kfree(e);
err_kzalloc:
return NULL;
}
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