// SPDX-License-Identifier: GPL-2.0
/* Texas Instruments K3 ICSSG Ethernet Switchdev Driver
*
* Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com/
*
*/
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
#include <linux/netdevice.h>
#include <linux/workqueue.h>
#include <net/switchdev.h>
#include "icssg_prueth.h"
#include "icssg_switchdev.h"
#include "icssg_mii_rt.h"
struct prueth_switchdev_event_work {
struct work_struct work;
struct switchdev_notifier_fdb_info fdb_info;
struct prueth_emac *emac;
unsigned long event;
};
static int prueth_switchdev_stp_state_set(struct prueth_emac *emac,
u8 state)
{
enum icssg_port_state_cmd emac_state;
int ret = 0;
switch (state) {
case BR_STATE_FORWARDING:
emac_state = ICSSG_EMAC_PORT_FORWARD;
break;
case BR_STATE_DISABLED:
emac_state = ICSSG_EMAC_PORT_DISABLE;
break;
case BR_STATE_LISTENING:
case BR_STATE_BLOCKING:
emac_state = ICSSG_EMAC_PORT_BLOCK;
break;
default:
return -EOPNOTSUPP;
}
icssg_set_port_state(emac, emac_state);
netdev_dbg(emac->ndev, "STP state: %u\n", emac_state);
return ret;
}
static int prueth_switchdev_attr_br_flags_set(struct prueth_emac *emac,
struct net_device *orig_dev,
struct switchdev_brport_flags brport_flags)
{
enum icssg_port_state_cmd emac_state;
if (brport_flags.mask & BR_MCAST_FLOOD)
emac_state = ICSSG_EMAC_PORT_MC_FLOODING_ENABLE;
else
emac_state = ICSSG_EMAC_PORT_MC_FLOODING_DISABLE;
netdev_dbg(emac->ndev, "BR_MCAST_FLOOD: %d port %u\n",
emac_state, emac->port_id);
icssg_set_port_state(emac, emac_state);
return 0;
}
static int prueth_switchdev_attr_br_flags_pre_set(struct net_device *netdev,
struct switchdev_brport_flags brport_flags)
{
if (brport_flags.mask & ~(BR_LEARNING | BR_MCAST_FLOOD))
return -EINVAL;
return 0;
}
static int prueth_switchdev_attr_set(struct net_device *ndev, const void *ctx,
const struct switchdev_attr *attr,
struct netlink_ext_ack *extack)
{
struct prueth_emac *emac = netdev_priv(ndev);
int ret;
netdev_dbg(ndev, "attr: id %u port: %u\n", attr->id, emac->port_id);
switch (attr->id) {
case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
ret = prueth_switchdev_attr_br_flags_pre_set(ndev,
attr->u.brport_flags);
break;
case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
ret = prueth_switchdev_stp_state_set(emac,
attr->u.stp_state);
netdev_dbg(ndev, "stp state: %u\n", attr->u.stp_state);
break;
case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
ret = prueth_switchdev_attr_br_flags_set(emac, attr->orig_dev,
attr->u.brport_flags);
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
static void prueth_switchdev_fdb_offload_notify(struct net_device *ndev,
struct switchdev_notifier_fdb_info *rcv)
{
struct switchdev_notifier_fdb_info info;
memset(&info, 0, sizeof(info));
info.addr = rcv->addr;
info.vid = rcv->vid;
info.offloaded = true;
call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
ndev, &info.info, NULL);
}
static void prueth_switchdev_event_work(struct work_struct *work)
{
struct prueth_switchdev_event_work *switchdev_work =
container_of(work, struct prueth_switchdev_event_work, work);
struct prueth_emac *emac = switchdev_work->emac;
struct switchdev_notifier_fdb_info *fdb;
int port_id = emac->port_id;
int ret;
rtnl_lock();
switch (switchdev_work->event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE:
fdb = &switchdev_work->fdb_info;
netdev_dbg(emac->ndev, "prueth_fdb_add: MACID = %pM vid = %u flags = %u %u -- port %d\n",
fdb->addr, fdb->vid, fdb->added_by_user,
fdb->offloaded, port_id);
if (!fdb->added_by_user)
break;
if (!ether_addr_equal(emac->mac_addr, fdb->addr))
break;
ret = icssg_fdb_add_del(emac, fdb->addr, fdb->vid,
BIT(port_id), true);
if (!ret)
prueth_switchdev_fdb_offload_notify(emac->ndev, fdb);
break;
case SWITCHDEV_FDB_DEL_TO_DEVICE:
fdb = &switchdev_work->fdb_info;
netdev_dbg(emac->ndev, "prueth_fdb_del: MACID = %pM vid = %u flags = %u %u -- port %d\n",
fdb->addr, fdb->vid, fdb->added_by_user,
fdb->offloaded, port_id);
if (!fdb->added_by_user)
break;
if (!ether_addr_equal(emac->mac_addr, fdb->addr))
break;
icssg_fdb_add_del(emac, fdb->addr, fdb->vid,
BIT(port_id), false);
break;
default:
break;
}
rtnl_unlock();
kfree(switchdev_work->fdb_info.addr);
kfree(switchdev_work);
dev_put(emac->ndev);
}
static int prueth_switchdev_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *ndev = switchdev_notifier_info_to_dev(ptr);
struct prueth_switchdev_event_work *switchdev_work;
struct switchdev_notifier_fdb_info *fdb_info = ptr;
struct prueth_emac *emac = netdev_priv(ndev);
int err;
if (!prueth_dev_check(ndev))
return NOTIFY_DONE;
if (event == SWITCHDEV_PORT_ATTR_SET) {
err = switchdev_handle_port_attr_set(ndev, ptr,
prueth_dev_check,
prueth_switchdev_attr_set);
return notifier_from_errno(err);
}
switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
if (WARN_ON(!switchdev_work))
return NOTIFY_BAD;
INIT_WORK(&switchdev_work->work, prueth_switchdev_event_work);
switchdev_work->emac = emac;
switchdev_work->event = event;
switch (event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE:
case SWITCHDEV_FDB_DEL_TO_DEVICE:
memcpy(&switchdev_work->fdb_info, ptr,
sizeof(switchdev_work->fdb_info));
switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
if (!switchdev_work->fdb_info.addr)
goto err_addr_alloc;
ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
fdb_info->addr);
dev_hold(ndev);
break;
default:
kfree(switchdev_work);
return NOTIFY_DONE;
}
queue_work(system_long_wq, &switchdev_work->work);
return NOTIFY_DONE;
err_addr_alloc:
kfree(switchdev_work);
return NOTIFY_BAD;
}
static int prueth_switchdev_vlan_add(struct prueth_emac *emac, bool untag, bool pvid,
u8 vid, struct net_device *orig_dev)
{
bool cpu_port = netif_is_bridge_master(orig_dev);
int untag_mask = 0;
int port_mask;
int ret = 0;
if (cpu_port)
port_mask = BIT(PRUETH_PORT_HOST);
else
port_mask = BIT(emac->port_id);
if (untag)
untag_mask = port_mask;
icssg_vtbl_modify(emac, vid, port_mask, untag_mask, true);
netdev_dbg(emac->ndev, "VID add vid:%u port_mask:%X untag_mask %X PVID %d\n",
vid, port_mask, untag_mask, pvid);
if (!pvid)
return ret;
icssg_set_pvid(emac->prueth, vid, emac->port_id);
return ret;
}
static int prueth_switchdev_vlan_del(struct prueth_emac *emac, u16 vid,
struct net_device *orig_dev)
{
bool cpu_port = netif_is_bridge_master(orig_dev);
int port_mask;
int ret = 0;
if (cpu_port)
port_mask = BIT(PRUETH_PORT_HOST);
else
port_mask = BIT(emac->port_id);
icssg_vtbl_modify(emac, vid, port_mask, 0, false);
if (cpu_port)
icssg_fdb_add_del(emac, emac->mac_addr, vid,
BIT(PRUETH_PORT_HOST), false);
if (vid == icssg_get_pvid(emac))
icssg_set_pvid(emac->prueth, 0, emac->port_id);
netdev_dbg(emac->ndev, "VID del vid:%u port_mask:%X\n",
vid, port_mask);
return ret;
}
static int prueth_switchdev_vlans_add(struct prueth_emac *emac,
const struct switchdev_obj_port_vlan *vlan)
{
bool untag = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
struct net_device *orig_dev = vlan->obj.orig_dev;
bool cpu_port = netif_is_bridge_master(orig_dev);
bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
netdev_dbg(emac->ndev, "VID add vid:%u flags:%X\n",
vlan->vid, vlan->flags);
if (cpu_port && !(vlan->flags & BRIDGE_VLAN_INFO_BRENTRY))
return 0;
if (vlan->vid > 0xff)
return 0;
return prueth_switchdev_vlan_add(emac, untag, pvid, vlan->vid,
orig_dev);
}
static int prueth_switchdev_vlans_del(struct prueth_emac *emac,
const struct switchdev_obj_port_vlan *vlan)
{
if (vlan->vid > 0xff)
return 0;
return prueth_switchdev_vlan_del(emac, vlan->vid,
vlan->obj.orig_dev);
}
static int prueth_switchdev_mdb_add(struct prueth_emac *emac,
struct switchdev_obj_port_mdb *mdb)
{
struct net_device *orig_dev = mdb->obj.orig_dev;
u8 port_mask, fid_c2;
bool cpu_port;
int err;
cpu_port = netif_is_bridge_master(orig_dev);
if (cpu_port)
port_mask = BIT(PRUETH_PORT_HOST);
else
port_mask = BIT(emac->port_id);
fid_c2 = icssg_fdb_lookup(emac, mdb->addr, mdb->vid);
err = icssg_fdb_add_del(emac, mdb->addr, mdb->vid, fid_c2 | port_mask, true);
netdev_dbg(emac->ndev, "MDB add vid %u:%pM ports: %X\n",
mdb->vid, mdb->addr, port_mask);
return err;
}
static int prueth_switchdev_mdb_del(struct prueth_emac *emac,
struct switchdev_obj_port_mdb *mdb)
{
struct net_device *orig_dev = mdb->obj.orig_dev;
int del_mask, ret, fid_c2;
bool cpu_port;
cpu_port = netif_is_bridge_master(orig_dev);
if (cpu_port)
del_mask = BIT(PRUETH_PORT_HOST);
else
del_mask = BIT(emac->port_id);
fid_c2 = icssg_fdb_lookup(emac, mdb->addr, mdb->vid);
if (fid_c2 & ~del_mask)
ret = icssg_fdb_add_del(emac, mdb->addr, mdb->vid, fid_c2 & ~del_mask, true);
else
ret = icssg_fdb_add_del(emac, mdb->addr, mdb->vid, 0, false);
netdev_dbg(emac->ndev, "MDB del vid %u:%pM ports: %X\n",
mdb->vid, mdb->addr, del_mask);
return ret;
}
static int prueth_switchdev_obj_add(struct net_device *ndev, const void *ctx,
const struct switchdev_obj *obj,
struct netlink_ext_ack *extack)
{
struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
struct prueth_emac *emac = netdev_priv(ndev);
int err = 0;
netdev_dbg(ndev, "obj_add: id %u port: %u\n", obj->id, emac->port_id);
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = prueth_switchdev_vlans_add(emac, vlan);
break;
case SWITCHDEV_OBJ_ID_PORT_MDB:
case SWITCHDEV_OBJ_ID_HOST_MDB:
err = prueth_switchdev_mdb_add(emac, mdb);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int prueth_switchdev_obj_del(struct net_device *ndev, const void *ctx,
const struct switchdev_obj *obj)
{
struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj);
struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj);
struct prueth_emac *emac = netdev_priv(ndev);
int err = 0;
netdev_dbg(ndev, "obj_del: id %u port: %u\n", obj->id, emac->port_id);
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_VLAN:
err = prueth_switchdev_vlans_del(emac, vlan);
break;
case SWITCHDEV_OBJ_ID_PORT_MDB:
case SWITCHDEV_OBJ_ID_HOST_MDB:
err = prueth_switchdev_mdb_del(emac, mdb);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int prueth_switchdev_blocking_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
int err;
switch (event) {
case SWITCHDEV_PORT_OBJ_ADD:
err = switchdev_handle_port_obj_add(dev, ptr,
prueth_dev_check,
prueth_switchdev_obj_add);
return notifier_from_errno(err);
case SWITCHDEV_PORT_OBJ_DEL:
err = switchdev_handle_port_obj_del(dev, ptr,
prueth_dev_check,
prueth_switchdev_obj_del);
return notifier_from_errno(err);
case SWITCHDEV_PORT_ATTR_SET:
err = switchdev_handle_port_attr_set(dev, ptr,
prueth_dev_check,
prueth_switchdev_attr_set);
return notifier_from_errno(err);
default:
break;
}
return NOTIFY_DONE;
}
int prueth_switchdev_register_notifiers(struct prueth *prueth)
{
int ret = 0;
prueth->prueth_switchdev_nb.notifier_call = &prueth_switchdev_event;
ret = register_switchdev_notifier(&prueth->prueth_switchdev_nb);
if (ret) {
dev_err(prueth->dev, "register switchdev notifier fail ret:%d\n",
ret);
return ret;
}
prueth->prueth_switchdev_bl_nb.notifier_call = &prueth_switchdev_blocking_event;
ret = register_switchdev_blocking_notifier(&prueth->prueth_switchdev_bl_nb);
if (ret) {
dev_err(prueth->dev, "register switchdev blocking notifier ret:%d\n",
ret);
unregister_switchdev_notifier(&prueth->prueth_switchdev_nb);
}
return ret;
}
void prueth_switchdev_unregister_notifiers(struct prueth *prueth)
{
unregister_switchdev_blocking_notifier(&prueth->prueth_switchdev_bl_nb);
unregister_switchdev_notifier(&prueth->prueth_switchdev_nb);
}
Codebase Browser
linux