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