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548 lines
14 KiB
548 lines
14 KiB
// 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 cpu_port = netif_is_bridge_master(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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if (cpu_port && !(vlan->flags & BRIDGE_VLAN_INFO_BRENTRY)) |
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return 0; |
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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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} |
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static struct notifier_block cpsw_switchdev_notifier = { |
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.notifier_call = cpsw_switchdev_event, |
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}; |
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static int cpsw_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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cpsw_port_dev_check, |
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cpsw_port_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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cpsw_port_dev_check, |
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cpsw_port_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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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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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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static struct notifier_block cpsw_switchdev_bl_notifier = { |
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.notifier_call = cpsw_switchdev_blocking_event, |
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}; |
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int cpsw_switchdev_register_notifiers(struct cpsw_common *cpsw) |
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{ |
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int ret = 0; |
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ret = register_switchdev_notifier(&cpsw_switchdev_notifier); |
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if (ret) { |
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dev_err(cpsw->dev, "register switchdev notifier fail ret:%d\n", |
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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); |
|
}
|
|
|