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// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/* Microsemi Ocelot Switch driver
*
* Copyright (c) 2017, 2019 Microsemi Corporation
* Copyright 2020-2021 NXP
*/
#include <linux/if_bridge.h>
#include <linux/mrp_bridge.h>
#include <soc/mscc/ocelot_vcap.h>
#include <uapi/linux/mrp_bridge.h>
#include "ocelot.h"
#include "ocelot_vcap.h"
static const u8 mrp_test_dmac[] = { 0x01, 0x15, 0x4e, 0x00, 0x00, 0x01 };
static const u8 mrp_control_dmac[] = { 0x01, 0x15, 0x4e, 0x00, 0x00, 0x02 };
static int ocelot_mrp_find_partner_port(struct ocelot *ocelot,
struct ocelot_port *p)
{
int i;
for (i = 0; i < ocelot->num_phys_ports; ++i) {
struct ocelot_port *ocelot_port = ocelot->ports[i];
if (!ocelot_port || p == ocelot_port)
continue;
if (ocelot_port->mrp_ring_id == p->mrp_ring_id)
return i;
}
return -1;
}
static int ocelot_mrp_del_vcap(struct ocelot *ocelot, int id)
{
struct ocelot_vcap_block *block_vcap_is2;
struct ocelot_vcap_filter *filter;
block_vcap_is2 = &ocelot->block[VCAP_IS2];
filter = ocelot_vcap_block_find_filter_by_id(block_vcap_is2, id,
false);
if (!filter)
return 0;
return ocelot_vcap_filter_del(ocelot, filter);
}
static int ocelot_mrp_redirect_add_vcap(struct ocelot *ocelot, int src_port,
int dst_port)
{
const u8 mrp_test_mask[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
struct ocelot_vcap_filter *filter;
int err;
filter = kzalloc(sizeof(*filter), GFP_KERNEL);
if (!filter)
return -ENOMEM;
filter->key_type = OCELOT_VCAP_KEY_ETYPE;
filter->prio = 1;
filter->id.cookie = OCELOT_VCAP_IS2_MRP_REDIRECT(ocelot, src_port);
filter->id.tc_offload = false;
filter->block_id = VCAP_IS2;
filter->type = OCELOT_VCAP_FILTER_OFFLOAD;
filter->ingress_port_mask = BIT(src_port);
ether_addr_copy(filter->key.etype.dmac.value, mrp_test_dmac);
ether_addr_copy(filter->key.etype.dmac.mask, mrp_test_mask);
filter->action.mask_mode = OCELOT_MASK_MODE_REDIRECT;
filter->action.port_mask = BIT(dst_port);
err = ocelot_vcap_filter_add(ocelot, filter, NULL);
if (err)
kfree(filter);
return err;
}
static void ocelot_populate_mrp_trap_key(struct ocelot_vcap_filter *filter)
{
const u8 mrp_mask[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
/* Here is possible to use control or test dmac because the mask
* doesn't cover the LSB
*/
ether_addr_copy(filter->key.etype.dmac.value, mrp_test_dmac);
ether_addr_copy(filter->key.etype.dmac.mask, mrp_mask);
}
static int ocelot_mrp_trap_add(struct ocelot *ocelot, int port)
{
unsigned long cookie = OCELOT_VCAP_IS2_MRP_TRAP(ocelot);
return ocelot_trap_add(ocelot, port, cookie, false,
ocelot_populate_mrp_trap_key);
}
static int ocelot_mrp_trap_del(struct ocelot *ocelot, int port)
{
unsigned long cookie = OCELOT_VCAP_IS2_MRP_TRAP(ocelot);
return ocelot_trap_del(ocelot, port, cookie);
}
static void ocelot_mrp_save_mac(struct ocelot *ocelot,
struct ocelot_port *port)
{
ocelot_mact_learn(ocelot, PGID_BLACKHOLE, mrp_test_dmac,
OCELOT_STANDALONE_PVID, ENTRYTYPE_LOCKED);
ocelot_mact_learn(ocelot, PGID_BLACKHOLE, mrp_control_dmac,
OCELOT_STANDALONE_PVID, ENTRYTYPE_LOCKED);
}
static void ocelot_mrp_del_mac(struct ocelot *ocelot,
struct ocelot_port *port)
{
ocelot_mact_forget(ocelot, mrp_test_dmac, OCELOT_STANDALONE_PVID);
ocelot_mact_forget(ocelot, mrp_control_dmac, OCELOT_STANDALONE_PVID);
}
int ocelot_mrp_add(struct ocelot *ocelot, int port,
const struct switchdev_obj_mrp *mrp)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
struct ocelot_port_private *priv;
struct net_device *dev;
if (!ocelot_port)
return -EOPNOTSUPP;
priv = container_of(ocelot_port, struct ocelot_port_private, port);
dev = priv->dev;
if (mrp->p_port != dev && mrp->s_port != dev)
return 0;
ocelot_port->mrp_ring_id = mrp->ring_id;
return 0;
}
EXPORT_SYMBOL(ocelot_mrp_add);
int ocelot_mrp_del(struct ocelot *ocelot, int port,
const struct switchdev_obj_mrp *mrp)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
if (!ocelot_port)
return -EOPNOTSUPP;
if (ocelot_port->mrp_ring_id != mrp->ring_id)
return 0;
ocelot_port->mrp_ring_id = 0;
return 0;
}
EXPORT_SYMBOL(ocelot_mrp_del);
int ocelot_mrp_add_ring_role(struct ocelot *ocelot, int port,
const struct switchdev_obj_ring_role_mrp *mrp)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
int dst_port;
int err;
if (!ocelot_port)
return -EOPNOTSUPP;
if (mrp->ring_role != BR_MRP_RING_ROLE_MRC && !mrp->sw_backup)
return -EOPNOTSUPP;
if (ocelot_port->mrp_ring_id != mrp->ring_id)
return 0;
ocelot_mrp_save_mac(ocelot, ocelot_port);
if (mrp->ring_role != BR_MRP_RING_ROLE_MRC)
return ocelot_mrp_trap_add(ocelot, port);
dst_port = ocelot_mrp_find_partner_port(ocelot, ocelot_port);
if (dst_port == -1)
return -EINVAL;
err = ocelot_mrp_redirect_add_vcap(ocelot, port, dst_port);
if (err)
return err;
err = ocelot_mrp_trap_add(ocelot, port);
if (err) {
ocelot_mrp_del_vcap(ocelot,
OCELOT_VCAP_IS2_MRP_REDIRECT(ocelot, port));
return err;
}
return 0;
}
EXPORT_SYMBOL(ocelot_mrp_add_ring_role);
int ocelot_mrp_del_ring_role(struct ocelot *ocelot, int port,
const struct switchdev_obj_ring_role_mrp *mrp)
{
struct ocelot_port *ocelot_port = ocelot->ports[port];
int err, i;
if (!ocelot_port)
return -EOPNOTSUPP;
if (mrp->ring_role != BR_MRP_RING_ROLE_MRC && !mrp->sw_backup)
return -EOPNOTSUPP;
if (ocelot_port->mrp_ring_id != mrp->ring_id)
return 0;
err = ocelot_mrp_trap_del(ocelot, port);
if (err)
return err;
ocelot_mrp_del_vcap(ocelot, OCELOT_VCAP_IS2_MRP_REDIRECT(ocelot, port));
for (i = 0; i < ocelot->num_phys_ports; ++i) {
ocelot_port = ocelot->ports[i];
if (!ocelot_port)
continue;
if (ocelot_port->mrp_ring_id != 0)
goto out;
}
ocelot_mrp_del_mac(ocelot, ocelot->ports[port]);
out:
return 0;
}
EXPORT_SYMBOL(ocelot_mrp_del_ring_role);
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