--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Texas Instruments K3 AM65 Ethernet Switchdev Driver
+ *
+ * Copyright (C) 2020 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 "am65-cpsw-nuss.h"
+#include "am65-cpsw-switchdev.h"
+#include "cpsw_ale.h"
+
+struct am65_cpsw_switchdev_event_work {
+ struct work_struct work;
+ struct switchdev_notifier_fdb_info fdb_info;
+ struct am65_cpsw_port *port;
+ unsigned long event;
+};
+
+static int am65_cpsw_port_stp_state_set(struct am65_cpsw_port *port, u8 state)
+{
+ struct am65_cpsw_common *cpsw = port->common;
+ u8 cpsw_state;
+ int ret = 0;
+
+ switch (state) {
+ case BR_STATE_FORWARDING:
+ cpsw_state = ALE_PORT_STATE_FORWARD;
+ break;
+ case BR_STATE_LEARNING:
+ cpsw_state = ALE_PORT_STATE_LEARN;
+ break;
+ case BR_STATE_DISABLED:
+ cpsw_state = ALE_PORT_STATE_DISABLE;
+ break;
+ case BR_STATE_LISTENING:
+ case BR_STATE_BLOCKING:
+ cpsw_state = ALE_PORT_STATE_BLOCK;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ ret = cpsw_ale_control_set(cpsw->ale, port->port_id,
+ ALE_PORT_STATE, cpsw_state);
+ netdev_dbg(port->ndev, "ale state: %u\n", cpsw_state);
+
+ return ret;
+}
+
+static int am65_cpsw_port_attr_br_flags_set(struct am65_cpsw_port *port,
+ struct net_device *orig_dev,
+ unsigned long brport_flags)
+{
+ struct am65_cpsw_common *cpsw = port->common;
+ bool unreg_mcast_add = false;
+
+ if (brport_flags & BR_MCAST_FLOOD)
+ unreg_mcast_add = true;
+ netdev_dbg(port->ndev, "BR_MCAST_FLOOD: %d port %u\n",
+ unreg_mcast_add, port->port_id);
+
+ cpsw_ale_set_unreg_mcast(cpsw->ale, BIT(port->port_id),
+ unreg_mcast_add);
+
+ return 0;
+}
+
+static int am65_cpsw_port_attr_br_flags_pre_set(struct net_device *netdev,
+ unsigned long flags)
+{
+ if (flags & ~(BR_LEARNING | BR_MCAST_FLOOD))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int am65_cpsw_port_attr_set(struct net_device *ndev,
+ const struct switchdev_attr *attr)
+{
+ struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
+ int ret;
+
+ netdev_dbg(ndev, "attr: id %u port: %u\n", attr->id, port->port_id);
+
+ switch (attr->id) {
+ case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
+ ret = am65_cpsw_port_attr_br_flags_pre_set(ndev,
+ attr->u.brport_flags);
+ break;
+ case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
+ ret = am65_cpsw_port_stp_state_set(port, attr->u.stp_state);
+ netdev_dbg(ndev, "stp state: %u\n", attr->u.stp_state);
+ break;
+ case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
+ ret = am65_cpsw_port_attr_br_flags_set(port, attr->orig_dev,
+ attr->u.brport_flags);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ break;
+ }
+
+ return ret;
+}
+
+static u16 am65_cpsw_get_pvid(struct am65_cpsw_port *port)
+{
+ struct am65_cpsw_common *cpsw = port->common;
+ struct am65_cpsw_host *host_p = am65_common_get_host(cpsw);
+ u32 pvid;
+
+ if (port->port_id)
+ pvid = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
+ else
+ pvid = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
+
+ pvid = pvid & 0xfff;
+
+ return pvid;
+}
+
+static void am65_cpsw_set_pvid(struct am65_cpsw_port *port, u16 vid, bool cfi, u32 cos)
+{
+ struct am65_cpsw_common *cpsw = port->common;
+ struct am65_cpsw_host *host_p = am65_common_get_host(cpsw);
+ u32 pvid;
+
+ pvid = vid;
+ pvid |= cfi ? BIT(12) : 0;
+ pvid |= (cos & 0x7) << 13;
+
+ if (port->port_id)
+ writel(pvid, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
+ else
+ writel(pvid, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
+}
+
+static int am65_cpsw_port_vlan_add(struct am65_cpsw_port *port, bool untag, bool pvid,
+ u16 vid, struct net_device *orig_dev)
+{
+ bool cpu_port = netif_is_bridge_master(orig_dev);
+ struct am65_cpsw_common *cpsw = port->common;
+ int unreg_mcast_mask = 0;
+ int reg_mcast_mask = 0;
+ int untag_mask = 0;
+ int port_mask;
+ int ret = 0;
+ u32 flags;
+
+ if (cpu_port) {
+ port_mask = BIT(HOST_PORT_NUM);
+ flags = orig_dev->flags;
+ unreg_mcast_mask = port_mask;
+ } else {
+ port_mask = BIT(port->port_id);
+ flags = port->ndev->flags;
+ }
+
+ if (flags & IFF_MULTICAST)
+ reg_mcast_mask = port_mask;
+
+ if (untag)
+ untag_mask = port_mask;
+
+ ret = cpsw_ale_vlan_add_modify(cpsw->ale, vid, port_mask, untag_mask,
+ reg_mcast_mask, unreg_mcast_mask);
+ if (ret) {
+ netdev_err(port->ndev, "Unable to add vlan\n");
+ return ret;
+ }
+
+ if (cpu_port)
+ cpsw_ale_add_ucast(cpsw->ale, port->slave.mac_addr,
+ HOST_PORT_NUM, ALE_VLAN | ALE_SECURE, vid);
+ if (!pvid)
+ return ret;
+
+ am65_cpsw_set_pvid(port, vid, 0, 0);
+
+ netdev_dbg(port->ndev, "VID add: %s: vid:%u ports:%X\n",
+ port->ndev->name, vid, port_mask);
+
+ return ret;
+}
+
+static int am65_cpsw_port_vlan_del(struct am65_cpsw_port *port, u16 vid,
+ struct net_device *orig_dev)
+{
+ bool cpu_port = netif_is_bridge_master(orig_dev);
+ struct am65_cpsw_common *cpsw = port->common;
+ int port_mask;
+ int ret = 0;
+
+ if (cpu_port)
+ port_mask = BIT(HOST_PORT_NUM);
+ else
+ port_mask = BIT(port->port_id);
+
+ ret = cpsw_ale_del_vlan(cpsw->ale, vid, port_mask);
+ if (ret != 0)
+ return ret;
+
+ /* We don't care for the return value here, error is returned only if
+ * the unicast entry is not present
+ */
+ if (cpu_port)
+ cpsw_ale_del_ucast(cpsw->ale, port->slave.mac_addr,
+ HOST_PORT_NUM, ALE_VLAN, vid);
+
+ if (vid == am65_cpsw_get_pvid(port))
+ am65_cpsw_set_pvid(port, 0, 0, 0);
+
+ /* We don't care for the return value here, error is returned only if
+ * the multicast entry is not present
+ */
+ cpsw_ale_del_mcast(cpsw->ale, port->ndev->broadcast, port_mask,
+ ALE_VLAN, vid);
+ netdev_dbg(port->ndev, "VID del: %s: vid:%u ports:%X\n",
+ port->ndev->name, vid, port_mask);
+
+ return ret;
+}
+
+static int am65_cpsw_port_vlans_add(struct am65_cpsw_port *port,
+ 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(port->ndev, "VID add: %s: vid:%u flags:%X\n",
+ port->ndev->name, vlan->vid, vlan->flags);
+
+ if (cpu_port && !(vlan->flags & BRIDGE_VLAN_INFO_BRENTRY))
+ return 0;
+
+ return am65_cpsw_port_vlan_add(port, untag, pvid, vlan->vid, orig_dev);
+}
+
+static int am65_cpsw_port_vlans_del(struct am65_cpsw_port *port,
+ const struct switchdev_obj_port_vlan *vlan)
+
+{
+ return am65_cpsw_port_vlan_del(port, vlan->vid, vlan->obj.orig_dev);
+}
+
+static int am65_cpsw_port_mdb_add(struct am65_cpsw_port *port,
+ struct switchdev_obj_port_mdb *mdb)
+
+{
+ struct net_device *orig_dev = mdb->obj.orig_dev;
+ bool cpu_port = netif_is_bridge_master(orig_dev);
+ struct am65_cpsw_common *cpsw = port->common;
+ int port_mask;
+ int err;
+
+ if (cpu_port)
+ port_mask = BIT(HOST_PORT_NUM);
+ else
+ port_mask = BIT(port->port_id);
+
+ err = cpsw_ale_add_mcast(cpsw->ale, mdb->addr, port_mask,
+ ALE_VLAN, mdb->vid, 0);
+ netdev_dbg(port->ndev, "MDB add: %s: vid %u:%pM ports: %X\n",
+ port->ndev->name, mdb->vid, mdb->addr, port_mask);
+
+ return err;
+}
+
+static int am65_cpsw_port_mdb_del(struct am65_cpsw_port *port,
+ struct switchdev_obj_port_mdb *mdb)
+
+{
+ struct net_device *orig_dev = mdb->obj.orig_dev;
+ bool cpu_port = netif_is_bridge_master(orig_dev);
+ struct am65_cpsw_common *cpsw = port->common;
+ int del_mask;
+
+ if (cpu_port)
+ del_mask = BIT(HOST_PORT_NUM);
+ else
+ del_mask = BIT(port->port_id);
+
+ /* Ignore error as error code is returned only when entry is already removed */
+ cpsw_ale_del_mcast(cpsw->ale, mdb->addr, del_mask,
+ ALE_VLAN, mdb->vid);
+ netdev_dbg(port->ndev, "MDB del: %s: vid %u:%pM ports: %X\n",
+ port->ndev->name, mdb->vid, mdb->addr, del_mask);
+
+ return 0;
+}
+
+static int am65_cpsw_port_obj_add(struct net_device *ndev,
+ 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 am65_cpsw_port *port = am65_ndev_to_port(ndev);
+ int err = 0;
+
+ netdev_dbg(ndev, "obj_add: id %u port: %u\n", obj->id, port->port_id);
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_ID_PORT_VLAN:
+ err = am65_cpsw_port_vlans_add(port, vlan);
+ break;
+ case SWITCHDEV_OBJ_ID_PORT_MDB:
+ case SWITCHDEV_OBJ_ID_HOST_MDB:
+ err = am65_cpsw_port_mdb_add(port, mdb);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
+static int am65_cpsw_port_obj_del(struct net_device *ndev,
+ 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 am65_cpsw_port *port = am65_ndev_to_port(ndev);
+ int err = 0;
+
+ netdev_dbg(ndev, "obj_del: id %u port: %u\n", obj->id, port->port_id);
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_ID_PORT_VLAN:
+ err = am65_cpsw_port_vlans_del(port, vlan);
+ break;
+ case SWITCHDEV_OBJ_ID_PORT_MDB:
+ case SWITCHDEV_OBJ_ID_HOST_MDB:
+ err = am65_cpsw_port_mdb_del(port, mdb);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ return err;
+}
+
+static void am65_cpsw_fdb_offload_notify(struct net_device *ndev,
+ struct switchdev_notifier_fdb_info *rcv)
+{
+ struct switchdev_notifier_fdb_info info;
+
+ info.addr = rcv->addr;
+ info.vid = rcv->vid;
+ info.offloaded = true;
+ call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED,
+ ndev, &info.info, NULL);
+}
+
+static void am65_cpsw_switchdev_event_work(struct work_struct *work)
+{
+ struct am65_cpsw_switchdev_event_work *switchdev_work =
+ container_of(work, struct am65_cpsw_switchdev_event_work, work);
+ struct am65_cpsw_port *port = switchdev_work->port;
+ struct switchdev_notifier_fdb_info *fdb;
+ struct am65_cpsw_common *cpsw = port->common;
+ int port_id = port->port_id;
+
+ rtnl_lock();
+ switch (switchdev_work->event) {
+ case SWITCHDEV_FDB_ADD_TO_DEVICE:
+ fdb = &switchdev_work->fdb_info;
+
+ netdev_dbg(port->ndev, "cpsw_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 (memcmp(port->slave.mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
+ port_id = HOST_PORT_NUM;
+
+ cpsw_ale_add_ucast(cpsw->ale, (u8 *)fdb->addr, port_id,
+ fdb->vid ? ALE_VLAN : 0, fdb->vid);
+ am65_cpsw_fdb_offload_notify(port->ndev, fdb);
+ break;
+ case SWITCHDEV_FDB_DEL_TO_DEVICE:
+ fdb = &switchdev_work->fdb_info;
+
+ netdev_dbg(port->ndev, "cpsw_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 (memcmp(port->slave.mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
+ port_id = HOST_PORT_NUM;
+
+ cpsw_ale_del_ucast(cpsw->ale, (u8 *)fdb->addr, port_id,
+ fdb->vid ? ALE_VLAN : 0, fdb->vid);
+ break;
+ default:
+ break;
+ }
+ rtnl_unlock();
+
+ kfree(switchdev_work->fdb_info.addr);
+ kfree(switchdev_work);
+ dev_put(port->ndev);
+}
+
+/* called under rcu_read_lock() */
+static int am65_cpsw_switchdev_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *ndev = switchdev_notifier_info_to_dev(ptr);
+ struct am65_cpsw_switchdev_event_work *switchdev_work;
+ struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
+ struct switchdev_notifier_fdb_info *fdb_info = ptr;
+ int err;
+
+ if (event == SWITCHDEV_PORT_ATTR_SET) {
+ err = switchdev_handle_port_attr_set(ndev, ptr,
+ am65_cpsw_port_dev_check,
+ am65_cpsw_port_attr_set);
+ return notifier_from_errno(err);
+ }
+
+ if (!am65_cpsw_port_dev_check(ndev))
+ return NOTIFY_DONE;
+
+ switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
+ if (WARN_ON(!switchdev_work))
+ return NOTIFY_BAD;
+
+ INIT_WORK(&switchdev_work->work, am65_cpsw_switchdev_event_work);
+ switchdev_work->port = port;
+ 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 struct notifier_block cpsw_switchdev_notifier = {
+ .notifier_call = am65_cpsw_switchdev_event,
+};
+
+static int am65_cpsw_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,
+ am65_cpsw_port_dev_check,
+ am65_cpsw_port_obj_add);
+ return notifier_from_errno(err);
+ case SWITCHDEV_PORT_OBJ_DEL:
+ err = switchdev_handle_port_obj_del(dev, ptr,
+ am65_cpsw_port_dev_check,
+ am65_cpsw_port_obj_del);
+ return notifier_from_errno(err);
+ case SWITCHDEV_PORT_ATTR_SET:
+ err = switchdev_handle_port_attr_set(dev, ptr,
+ am65_cpsw_port_dev_check,
+ am65_cpsw_port_attr_set);
+ return notifier_from_errno(err);
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block cpsw_switchdev_bl_notifier = {
+ .notifier_call = am65_cpsw_switchdev_blocking_event,
+};
+
+int am65_cpsw_switchdev_register_notifiers(struct am65_cpsw_common *cpsw)
+{
+ int ret = 0;
+
+ ret = register_switchdev_notifier(&cpsw_switchdev_notifier);
+ if (ret) {
+ dev_err(cpsw->dev, "register switchdev notifier fail ret:%d\n",
+ ret);
+ return ret;
+ }
+
+ ret = register_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier);
+ if (ret) {
+ dev_err(cpsw->dev, "register switchdev blocking notifier ret:%d\n",
+ ret);
+ unregister_switchdev_notifier(&cpsw_switchdev_notifier);
+ }
+
+ return ret;
+}
+
+void am65_cpsw_switchdev_unregister_notifiers(struct am65_cpsw_common *cpsw)
+{
+ unregister_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier);
+ unregister_switchdev_notifier(&cpsw_switchdev_notifier);
+}
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