545 lines
13 KiB
C
545 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Texas Instruments switchdev Driver
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*
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* Copyright (C) 2019 Texas Instruments
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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 "cpsw.h"
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#include "cpsw_ale.h"
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#include "cpsw_priv.h"
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#include "cpsw_switchdev.h"
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struct cpsw_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 cpsw_priv *priv;
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unsigned long event;
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};
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static int cpsw_port_stp_state_set(struct cpsw_priv *priv, u8 state)
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{
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struct cpsw_common *cpsw = priv->cpsw;
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u8 cpsw_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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cpsw_state = ALE_PORT_STATE_FORWARD;
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break;
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case BR_STATE_LEARNING:
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cpsw_state = ALE_PORT_STATE_LEARN;
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break;
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case BR_STATE_DISABLED:
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cpsw_state = ALE_PORT_STATE_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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cpsw_state = ALE_PORT_STATE_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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ret = cpsw_ale_control_set(cpsw->ale, priv->emac_port,
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ALE_PORT_STATE, cpsw_state);
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dev_dbg(priv->dev, "ale state: %u\n", cpsw_state);
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return ret;
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}
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static int cpsw_port_attr_br_flags_set(struct cpsw_priv *priv,
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struct net_device *orig_dev,
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struct switchdev_brport_flags flags)
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{
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struct cpsw_common *cpsw = priv->cpsw;
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if (flags.mask & BR_MCAST_FLOOD) {
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bool unreg_mcast_add = false;
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if (flags.val & BR_MCAST_FLOOD)
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unreg_mcast_add = true;
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dev_dbg(priv->dev, "BR_MCAST_FLOOD: %d port %u\n",
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unreg_mcast_add, priv->emac_port);
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cpsw_ale_set_unreg_mcast(cpsw->ale, BIT(priv->emac_port),
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unreg_mcast_add);
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}
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return 0;
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}
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static int cpsw_port_attr_br_flags_pre_set(struct net_device *netdev,
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struct switchdev_brport_flags flags)
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{
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if (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 cpsw_port_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 cpsw_priv *priv = netdev_priv(ndev);
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int ret;
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dev_dbg(priv->dev, "attr: id %u port: %u\n", attr->id, priv->emac_port);
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switch (attr->id) {
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case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
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ret = cpsw_port_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 = cpsw_port_stp_state_set(priv, attr->u.stp_state);
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dev_dbg(priv->dev, "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 = cpsw_port_attr_br_flags_set(priv, 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 u16 cpsw_get_pvid(struct cpsw_priv *priv)
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{
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struct cpsw_common *cpsw = priv->cpsw;
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u32 __iomem *port_vlan_reg;
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u32 pvid;
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if (priv->emac_port) {
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int reg = CPSW2_PORT_VLAN;
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if (cpsw->version == CPSW_VERSION_1)
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reg = CPSW1_PORT_VLAN;
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pvid = slave_read(cpsw->slaves + (priv->emac_port - 1), reg);
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} else {
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port_vlan_reg = &cpsw->host_port_regs->port_vlan;
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pvid = readl(port_vlan_reg);
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}
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pvid = pvid & 0xfff;
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return pvid;
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}
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static void cpsw_set_pvid(struct cpsw_priv *priv, u16 vid, bool cfi, u32 cos)
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{
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struct cpsw_common *cpsw = priv->cpsw;
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void __iomem *port_vlan_reg;
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u32 pvid;
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pvid = vid;
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pvid |= cfi ? BIT(12) : 0;
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pvid |= (cos & 0x7) << 13;
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if (priv->emac_port) {
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int reg = CPSW2_PORT_VLAN;
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if (cpsw->version == CPSW_VERSION_1)
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reg = CPSW1_PORT_VLAN;
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/* no barrier */
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slave_write(cpsw->slaves + (priv->emac_port - 1), pvid, reg);
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} else {
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/* CPU port */
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port_vlan_reg = &cpsw->host_port_regs->port_vlan;
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writel(pvid, port_vlan_reg);
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}
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}
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static int cpsw_port_vlan_add(struct cpsw_priv *priv, bool untag, bool pvid,
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u16 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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struct cpsw_common *cpsw = priv->cpsw;
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int unreg_mcast_mask = 0;
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int reg_mcast_mask = 0;
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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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u32 flags;
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if (cpu_port) {
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port_mask = BIT(HOST_PORT_NUM);
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flags = orig_dev->flags;
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unreg_mcast_mask = port_mask;
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} else {
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port_mask = BIT(priv->emac_port);
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flags = priv->ndev->flags;
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}
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if (flags & IFF_MULTICAST)
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reg_mcast_mask = port_mask;
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if (untag)
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untag_mask = port_mask;
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ret = cpsw_ale_vlan_add_modify(cpsw->ale, vid, port_mask, untag_mask,
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reg_mcast_mask, unreg_mcast_mask);
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if (ret) {
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dev_err(priv->dev, "Unable to add vlan\n");
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return ret;
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}
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if (cpu_port)
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cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
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HOST_PORT_NUM, ALE_VLAN, vid);
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if (!pvid)
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return ret;
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cpsw_set_pvid(priv, vid, 0, 0);
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dev_dbg(priv->dev, "VID add: %s: vid:%u ports:%X\n",
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priv->ndev->name, vid, port_mask);
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return ret;
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}
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static int cpsw_port_vlan_del(struct cpsw_priv *priv, 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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struct cpsw_common *cpsw = priv->cpsw;
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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(HOST_PORT_NUM);
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else
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port_mask = BIT(priv->emac_port);
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ret = cpsw_ale_vlan_del_modify(cpsw->ale, vid, port_mask);
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if (ret != 0)
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return ret;
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/* We don't care for the return value here, error is returned only if
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* the unicast entry is not present
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*/
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if (cpu_port)
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cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
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HOST_PORT_NUM, ALE_VLAN, vid);
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if (vid == cpsw_get_pvid(priv))
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cpsw_set_pvid(priv, 0, 0, 0);
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/* We don't care for the return value here, error is returned only if
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* the multicast entry is not present
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*/
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cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
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port_mask, ALE_VLAN, vid);
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dev_dbg(priv->dev, "VID del: %s: vid:%u ports:%X\n",
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priv->ndev->name, vid, port_mask);
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return ret;
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}
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static int cpsw_port_vlans_add(struct cpsw_priv *priv,
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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 pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
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dev_dbg(priv->dev, "VID add: %s: vid:%u flags:%X\n",
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priv->ndev->name, vlan->vid, vlan->flags);
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return cpsw_port_vlan_add(priv, untag, pvid, vlan->vid, orig_dev);
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}
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static int cpsw_port_mdb_add(struct cpsw_priv *priv,
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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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bool cpu_port = netif_is_bridge_master(orig_dev);
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struct cpsw_common *cpsw = priv->cpsw;
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int port_mask;
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int err;
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if (cpu_port)
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port_mask = BIT(HOST_PORT_NUM);
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else
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port_mask = BIT(priv->emac_port);
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err = cpsw_ale_add_mcast(cpsw->ale, mdb->addr, port_mask,
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ALE_VLAN, mdb->vid, 0);
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dev_dbg(priv->dev, "MDB add: %s: vid %u:%pM ports: %X\n",
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priv->ndev->name, mdb->vid, mdb->addr, port_mask);
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return err;
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}
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static int cpsw_port_mdb_del(struct cpsw_priv *priv,
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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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bool cpu_port = netif_is_bridge_master(orig_dev);
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struct cpsw_common *cpsw = priv->cpsw;
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int del_mask;
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int err;
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if (cpu_port)
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del_mask = BIT(HOST_PORT_NUM);
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else
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del_mask = BIT(priv->emac_port);
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err = cpsw_ale_del_mcast(cpsw->ale, mdb->addr, del_mask,
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ALE_VLAN, mdb->vid);
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dev_dbg(priv->dev, "MDB del: %s: vid %u:%pM ports: %X\n",
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priv->ndev->name, mdb->vid, mdb->addr, del_mask);
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return err;
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}
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static int cpsw_port_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 cpsw_priv *priv = netdev_priv(ndev);
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int err = 0;
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dev_dbg(priv->dev, "obj_add: id %u port: %u\n",
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obj->id, priv->emac_port);
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switch (obj->id) {
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case SWITCHDEV_OBJ_ID_PORT_VLAN:
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err = cpsw_port_vlans_add(priv, 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 = cpsw_port_mdb_add(priv, 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 cpsw_port_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 cpsw_priv *priv = netdev_priv(ndev);
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int err = 0;
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dev_dbg(priv->dev, "obj_del: id %u port: %u\n",
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obj->id, priv->emac_port);
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switch (obj->id) {
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case SWITCHDEV_OBJ_ID_PORT_VLAN:
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err = cpsw_port_vlan_del(priv, vlan->vid, vlan->obj.orig_dev);
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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 = cpsw_port_mdb_del(priv, 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 void cpsw_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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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 cpsw_switchdev_event_work(struct work_struct *work)
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{
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struct cpsw_switchdev_event_work *switchdev_work =
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container_of(work, struct cpsw_switchdev_event_work, work);
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struct cpsw_priv *priv = switchdev_work->priv;
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struct switchdev_notifier_fdb_info *fdb;
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struct cpsw_common *cpsw = priv->cpsw;
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int port = priv->emac_port;
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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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dev_dbg(cpsw->dev, "cpsw_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);
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if (!fdb->added_by_user || fdb->is_local)
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break;
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if (memcmp(priv->mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
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port = HOST_PORT_NUM;
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cpsw_ale_add_ucast(cpsw->ale, (u8 *)fdb->addr, port,
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fdb->vid ? ALE_VLAN : 0, fdb->vid);
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cpsw_fdb_offload_notify(priv->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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dev_dbg(cpsw->dev, "cpsw_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);
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if (!fdb->added_by_user || fdb->is_local)
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break;
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if (memcmp(priv->mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0)
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port = HOST_PORT_NUM;
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cpsw_ale_del_ucast(cpsw->ale, (u8 *)fdb->addr, port,
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fdb->vid ? ALE_VLAN : 0, fdb->vid);
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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(priv->ndev);
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}
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/* called under rcu_read_lock() */
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static int cpsw_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 switchdev_notifier_fdb_info *fdb_info = ptr;
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struct cpsw_switchdev_event_work *switchdev_work;
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struct cpsw_priv *priv = netdev_priv(ndev);
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int err;
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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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cpsw_port_dev_check,
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cpsw_port_attr_set);
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return notifier_from_errno(err);
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}
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if (!cpsw_port_dev_check(ndev))
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return NOTIFY_DONE;
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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, cpsw_switchdev_event_work);
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switchdev_work->priv = priv;
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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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}
|
|
|
|
static struct notifier_block cpsw_switchdev_notifier = {
|
|
.notifier_call = cpsw_switchdev_event,
|
|
};
|
|
|
|
static int 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,
|
|
cpsw_port_dev_check,
|
|
cpsw_port_obj_add);
|
|
return notifier_from_errno(err);
|
|
case SWITCHDEV_PORT_OBJ_DEL:
|
|
err = switchdev_handle_port_obj_del(dev, ptr,
|
|
cpsw_port_dev_check,
|
|
cpsw_port_obj_del);
|
|
return notifier_from_errno(err);
|
|
case SWITCHDEV_PORT_ATTR_SET:
|
|
err = switchdev_handle_port_attr_set(dev, ptr,
|
|
cpsw_port_dev_check,
|
|
cpsw_port_attr_set);
|
|
return notifier_from_errno(err);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block cpsw_switchdev_bl_notifier = {
|
|
.notifier_call = cpsw_switchdev_blocking_event,
|
|
};
|
|
|
|
int cpsw_switchdev_register_notifiers(struct 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 cpsw_switchdev_unregister_notifiers(struct cpsw_common *cpsw)
|
|
{
|
|
unregister_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier);
|
|
unregister_switchdev_notifier(&cpsw_switchdev_notifier);
|
|
}
|