summaryrefslogtreecommitdiff
path: root/net/dsa
diff options
context:
space:
mode:
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/Kconfig26
-rw-r--r--net/dsa/Makefile8
-rw-r--r--net/dsa/dsa.c438
-rw-r--r--net/dsa/dsa_priv.h60
-rw-r--r--net/dsa/slave.c404
-rw-r--r--net/dsa/tag_dsa.c192
-rw-r--r--net/dsa/tag_edsa.c211
-rw-r--r--net/dsa/tag_trailer.c120
8 files changed, 1459 insertions, 0 deletions
diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
new file mode 100644
index 00000000..274791cd
--- /dev/null
+++ b/net/dsa/Kconfig
@@ -0,0 +1,26 @@
+config NET_DSA
+ tristate "Distributed Switch Architecture support"
+ default n
+ depends on EXPERIMENTAL && NETDEVICES && !S390
+ select PHYLIB
+ ---help---
+ This allows you to use hardware switch chips that use
+ the Distributed Switch Architecture.
+
+
+if NET_DSA
+
+# tagging formats
+config NET_DSA_TAG_DSA
+ bool
+ default n
+
+config NET_DSA_TAG_EDSA
+ bool
+ default n
+
+config NET_DSA_TAG_TRAILER
+ bool
+ default n
+
+endif
diff --git a/net/dsa/Makefile b/net/dsa/Makefile
new file mode 100644
index 00000000..7b9fcbbe
--- /dev/null
+++ b/net/dsa/Makefile
@@ -0,0 +1,8 @@
+# the core
+obj-$(CONFIG_NET_DSA) += dsa_core.o
+dsa_core-y += dsa.o slave.o
+
+# tagging formats
+dsa_core-$(CONFIG_NET_DSA_TAG_DSA) += tag_dsa.o
+dsa_core-$(CONFIG_NET_DSA_TAG_EDSA) += tag_edsa.o
+dsa_core-$(CONFIG_NET_DSA_TAG_TRAILER) += tag_trailer.o
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
new file mode 100644
index 00000000..88e7c2f3
--- /dev/null
+++ b/net/dsa/dsa.c
@@ -0,0 +1,438 @@
+/*
+ * net/dsa/dsa.c - Hardware switch handling
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <net/dsa.h>
+#include "dsa_priv.h"
+
+char dsa_driver_version[] = "0.1";
+
+
+/* switch driver registration ***********************************************/
+static DEFINE_MUTEX(dsa_switch_drivers_mutex);
+static LIST_HEAD(dsa_switch_drivers);
+
+void register_switch_driver(struct dsa_switch_driver *drv)
+{
+ mutex_lock(&dsa_switch_drivers_mutex);
+ list_add_tail(&drv->list, &dsa_switch_drivers);
+ mutex_unlock(&dsa_switch_drivers_mutex);
+}
+EXPORT_SYMBOL_GPL(register_switch_driver);
+
+void unregister_switch_driver(struct dsa_switch_driver *drv)
+{
+ mutex_lock(&dsa_switch_drivers_mutex);
+ list_del_init(&drv->list);
+ mutex_unlock(&dsa_switch_drivers_mutex);
+}
+EXPORT_SYMBOL_GPL(unregister_switch_driver);
+
+static struct dsa_switch_driver *
+dsa_switch_probe(struct mii_bus *bus, int sw_addr, char **_name)
+{
+ struct dsa_switch_driver *ret;
+ struct list_head *list;
+ char *name;
+
+ ret = NULL;
+ name = NULL;
+
+ mutex_lock(&dsa_switch_drivers_mutex);
+ list_for_each(list, &dsa_switch_drivers) {
+ struct dsa_switch_driver *drv;
+
+ drv = list_entry(list, struct dsa_switch_driver, list);
+
+ name = drv->probe(bus, sw_addr);
+ if (name != NULL) {
+ ret = drv;
+ break;
+ }
+ }
+ mutex_unlock(&dsa_switch_drivers_mutex);
+
+ *_name = name;
+
+ return ret;
+}
+
+
+/* basic switch operations **************************************************/
+static struct dsa_switch *
+dsa_switch_setup(struct dsa_switch_tree *dst, int index,
+ struct device *parent, struct mii_bus *bus)
+{
+ struct dsa_chip_data *pd = dst->pd->chip + index;
+ struct dsa_switch_driver *drv;
+ struct dsa_switch *ds;
+ int ret;
+ char *name;
+ int i;
+
+ /*
+ * Probe for switch model.
+ */
+ drv = dsa_switch_probe(bus, pd->sw_addr, &name);
+ if (drv == NULL) {
+ printk(KERN_ERR "%s[%d]: could not detect attached switch\n",
+ dst->master_netdev->name, index);
+ return ERR_PTR(-EINVAL);
+ }
+ printk(KERN_INFO "%s[%d]: detected a %s switch\n",
+ dst->master_netdev->name, index, name);
+
+
+ /*
+ * Allocate and initialise switch state.
+ */
+ ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL);
+ if (ds == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ ds->dst = dst;
+ ds->index = index;
+ ds->pd = dst->pd->chip + index;
+ ds->drv = drv;
+ ds->master_mii_bus = bus;
+
+
+ /*
+ * Validate supplied switch configuration.
+ */
+ for (i = 0; i < DSA_MAX_PORTS; i++) {
+ char *name;
+
+ name = pd->port_names[i];
+ if (name == NULL)
+ continue;
+
+ if (!strcmp(name, "cpu")) {
+ if (dst->cpu_switch != -1) {
+ printk(KERN_ERR "multiple cpu ports?!\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ dst->cpu_switch = index;
+ dst->cpu_port = i;
+ } else if (!strcmp(name, "dsa")) {
+ ds->dsa_port_mask |= 1 << i;
+ } else {
+ ds->phys_port_mask |= 1 << i;
+ }
+ }
+
+
+ /*
+ * If the CPU connects to this switch, set the switch tree
+ * tagging protocol to the preferred tagging format of this
+ * switch.
+ */
+ if (ds->dst->cpu_switch == index)
+ ds->dst->tag_protocol = drv->tag_protocol;
+
+
+ /*
+ * Do basic register setup.
+ */
+ ret = drv->setup(ds);
+ if (ret < 0)
+ goto out;
+
+ ret = drv->set_addr(ds, dst->master_netdev->dev_addr);
+ if (ret < 0)
+ goto out;
+
+ ds->slave_mii_bus = mdiobus_alloc();
+ if (ds->slave_mii_bus == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ dsa_slave_mii_bus_init(ds);
+
+ ret = mdiobus_register(ds->slave_mii_bus);
+ if (ret < 0)
+ goto out_free;
+
+
+ /*
+ * Create network devices for physical switch ports.
+ */
+ for (i = 0; i < DSA_MAX_PORTS; i++) {
+ struct net_device *slave_dev;
+
+ if (!(ds->phys_port_mask & (1 << i)))
+ continue;
+
+ slave_dev = dsa_slave_create(ds, parent, i, pd->port_names[i]);
+ if (slave_dev == NULL) {
+ printk(KERN_ERR "%s[%d]: can't create dsa "
+ "slave device for port %d(%s)\n",
+ dst->master_netdev->name,
+ index, i, pd->port_names[i]);
+ continue;
+ }
+
+ ds->ports[i] = slave_dev;
+ }
+
+ return ds;
+
+out_free:
+ mdiobus_free(ds->slave_mii_bus);
+out:
+ kfree(ds);
+ return ERR_PTR(ret);
+}
+
+static void dsa_switch_destroy(struct dsa_switch *ds)
+{
+}
+
+
+/* link polling *************************************************************/
+static void dsa_link_poll_work(struct work_struct *ugly)
+{
+ struct dsa_switch_tree *dst;
+ int i;
+
+ dst = container_of(ugly, struct dsa_switch_tree, link_poll_work);
+
+ for (i = 0; i < dst->pd->nr_chips; i++) {
+ struct dsa_switch *ds = dst->ds[i];
+
+ if (ds != NULL && ds->drv->poll_link != NULL)
+ ds->drv->poll_link(ds);
+ }
+
+ mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ));
+}
+
+static void dsa_link_poll_timer(unsigned long _dst)
+{
+ struct dsa_switch_tree *dst = (void *)_dst;
+
+ schedule_work(&dst->link_poll_work);
+}
+
+
+/* platform driver init and cleanup *****************************************/
+static int dev_is_class(struct device *dev, void *class)
+{
+ if (dev->class != NULL && !strcmp(dev->class->name, class))
+ return 1;
+
+ return 0;
+}
+
+static struct device *dev_find_class(struct device *parent, char *class)
+{
+ if (dev_is_class(parent, class)) {
+ get_device(parent);
+ return parent;
+ }
+
+ return device_find_child(parent, class, dev_is_class);
+}
+
+static struct mii_bus *dev_to_mii_bus(struct device *dev)
+{
+ struct device *d;
+
+ d = dev_find_class(dev, "mdio_bus");
+ if (d != NULL) {
+ struct mii_bus *bus;
+
+ bus = to_mii_bus(d);
+ put_device(d);
+
+ return bus;
+ }
+
+ return NULL;
+}
+
+static struct net_device *dev_to_net_device(struct device *dev)
+{
+ struct device *d;
+
+ d = dev_find_class(dev, "net");
+ if (d != NULL) {
+ struct net_device *nd;
+
+ nd = to_net_dev(d);
+ dev_hold(nd);
+ put_device(d);
+
+ return nd;
+ }
+
+ return NULL;
+}
+
+static int dsa_probe(struct platform_device *pdev)
+{
+ static int dsa_version_printed;
+ struct dsa_platform_data *pd = pdev->dev.platform_data;
+ struct net_device *dev;
+ struct dsa_switch_tree *dst;
+ int i;
+
+ if (!dsa_version_printed++)
+ printk(KERN_NOTICE "Distributed Switch Architecture "
+ "driver version %s\n", dsa_driver_version);
+
+ if (pd == NULL || pd->netdev == NULL)
+ return -EINVAL;
+
+ dev = dev_to_net_device(pd->netdev);
+ if (dev == NULL)
+ return -EINVAL;
+
+ if (dev->dsa_ptr != NULL) {
+ dev_put(dev);
+ return -EEXIST;
+ }
+
+ dst = kzalloc(sizeof(*dst), GFP_KERNEL);
+ if (dst == NULL) {
+ dev_put(dev);
+ return -ENOMEM;
+ }
+
+ platform_set_drvdata(pdev, dst);
+
+ dst->pd = pd;
+ dst->master_netdev = dev;
+ dst->cpu_switch = -1;
+ dst->cpu_port = -1;
+
+ for (i = 0; i < pd->nr_chips; i++) {
+ struct mii_bus *bus;
+ struct dsa_switch *ds;
+
+ bus = dev_to_mii_bus(pd->chip[i].mii_bus);
+ if (bus == NULL) {
+ printk(KERN_ERR "%s[%d]: no mii bus found for "
+ "dsa switch\n", dev->name, i);
+ continue;
+ }
+
+ ds = dsa_switch_setup(dst, i, &pdev->dev, bus);
+ if (IS_ERR(ds)) {
+ printk(KERN_ERR "%s[%d]: couldn't create dsa switch "
+ "instance (error %ld)\n", dev->name, i,
+ PTR_ERR(ds));
+ continue;
+ }
+
+ dst->ds[i] = ds;
+ if (ds->drv->poll_link != NULL)
+ dst->link_poll_needed = 1;
+ }
+
+ /*
+ * If we use a tagging format that doesn't have an ethertype
+ * field, make sure that all packets from this point on get
+ * sent to the tag format's receive function.
+ */
+ wmb();
+ dev->dsa_ptr = (void *)dst;
+
+ if (dst->link_poll_needed) {
+ INIT_WORK(&dst->link_poll_work, dsa_link_poll_work);
+ init_timer(&dst->link_poll_timer);
+ dst->link_poll_timer.data = (unsigned long)dst;
+ dst->link_poll_timer.function = dsa_link_poll_timer;
+ dst->link_poll_timer.expires = round_jiffies(jiffies + HZ);
+ add_timer(&dst->link_poll_timer);
+ }
+
+ return 0;
+}
+
+static int dsa_remove(struct platform_device *pdev)
+{
+ struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
+ int i;
+
+ if (dst->link_poll_needed)
+ del_timer_sync(&dst->link_poll_timer);
+
+ flush_work_sync(&dst->link_poll_work);
+
+ for (i = 0; i < dst->pd->nr_chips; i++) {
+ struct dsa_switch *ds = dst->ds[i];
+
+ if (ds != NULL)
+ dsa_switch_destroy(ds);
+ }
+
+ return 0;
+}
+
+static void dsa_shutdown(struct platform_device *pdev)
+{
+}
+
+static struct platform_driver dsa_driver = {
+ .probe = dsa_probe,
+ .remove = dsa_remove,
+ .shutdown = dsa_shutdown,
+ .driver = {
+ .name = "dsa",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init dsa_init_module(void)
+{
+ int rc;
+
+ rc = platform_driver_register(&dsa_driver);
+ if (rc)
+ return rc;
+
+#ifdef CONFIG_NET_DSA_TAG_DSA
+ dev_add_pack(&dsa_packet_type);
+#endif
+#ifdef CONFIG_NET_DSA_TAG_EDSA
+ dev_add_pack(&edsa_packet_type);
+#endif
+#ifdef CONFIG_NET_DSA_TAG_TRAILER
+ dev_add_pack(&trailer_packet_type);
+#endif
+ return 0;
+}
+module_init(dsa_init_module);
+
+static void __exit dsa_cleanup_module(void)
+{
+#ifdef CONFIG_NET_DSA_TAG_TRAILER
+ dev_remove_pack(&trailer_packet_type);
+#endif
+#ifdef CONFIG_NET_DSA_TAG_EDSA
+ dev_remove_pack(&edsa_packet_type);
+#endif
+#ifdef CONFIG_NET_DSA_TAG_DSA
+ dev_remove_pack(&dsa_packet_type);
+#endif
+ platform_driver_unregister(&dsa_driver);
+}
+module_exit(dsa_cleanup_module);
+
+MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
+MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:dsa");
diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
new file mode 100644
index 00000000..d4cf5cc7
--- /dev/null
+++ b/net/dsa/dsa_priv.h
@@ -0,0 +1,60 @@
+/*
+ * net/dsa/dsa_priv.h - Hardware switch handling
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __DSA_PRIV_H
+#define __DSA_PRIV_H
+
+#include <linux/phy.h>
+#include <net/dsa.h>
+
+struct dsa_slave_priv {
+ /*
+ * The linux network interface corresponding to this
+ * switch port.
+ */
+ struct net_device *dev;
+
+ /*
+ * Which switch this port is a part of, and the port index
+ * for this port.
+ */
+ struct dsa_switch *parent;
+ u8 port;
+
+ /*
+ * The phylib phy_device pointer for the PHY connected
+ * to this port.
+ */
+ struct phy_device *phy;
+};
+
+/* dsa.c */
+extern char dsa_driver_version[];
+
+/* slave.c */
+void dsa_slave_mii_bus_init(struct dsa_switch *ds);
+struct net_device *dsa_slave_create(struct dsa_switch *ds,
+ struct device *parent,
+ int port, char *name);
+
+/* tag_dsa.c */
+netdev_tx_t dsa_xmit(struct sk_buff *skb, struct net_device *dev);
+extern struct packet_type dsa_packet_type;
+
+/* tag_edsa.c */
+netdev_tx_t edsa_xmit(struct sk_buff *skb, struct net_device *dev);
+extern struct packet_type edsa_packet_type;
+
+/* tag_trailer.c */
+netdev_tx_t trailer_xmit(struct sk_buff *skb, struct net_device *dev);
+extern struct packet_type trailer_packet_type;
+
+
+#endif
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
new file mode 100644
index 00000000..56cf9b8e
--- /dev/null
+++ b/net/dsa/slave.c
@@ -0,0 +1,404 @@
+/*
+ * net/dsa/slave.c - Slave device handling
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/phy.h>
+#include "dsa_priv.h"
+
+/* slave mii_bus handling ***************************************************/
+static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
+{
+ struct dsa_switch *ds = bus->priv;
+
+ if (ds->phys_port_mask & (1 << addr))
+ return ds->drv->phy_read(ds, addr, reg);
+
+ return 0xffff;
+}
+
+static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
+{
+ struct dsa_switch *ds = bus->priv;
+
+ if (ds->phys_port_mask & (1 << addr))
+ return ds->drv->phy_write(ds, addr, reg, val);
+
+ return 0;
+}
+
+void dsa_slave_mii_bus_init(struct dsa_switch *ds)
+{
+ ds->slave_mii_bus->priv = (void *)ds;
+ ds->slave_mii_bus->name = "dsa slave smi";
+ ds->slave_mii_bus->read = dsa_slave_phy_read;
+ ds->slave_mii_bus->write = dsa_slave_phy_write;
+ snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "%s:%.2x",
+ ds->master_mii_bus->id, ds->pd->sw_addr);
+ ds->slave_mii_bus->parent = &ds->master_mii_bus->dev;
+}
+
+
+/* slave device handling ****************************************************/
+static int dsa_slave_init(struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+
+ dev->iflink = p->parent->dst->master_netdev->ifindex;
+
+ return 0;
+}
+
+static int dsa_slave_open(struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct net_device *master = p->parent->dst->master_netdev;
+ int err;
+
+ if (!(master->flags & IFF_UP))
+ return -ENETDOWN;
+
+ if (compare_ether_addr(dev->dev_addr, master->dev_addr)) {
+ err = dev_uc_add(master, dev->dev_addr);
+ if (err < 0)
+ goto out;
+ }
+
+ if (dev->flags & IFF_ALLMULTI) {
+ err = dev_set_allmulti(master, 1);
+ if (err < 0)
+ goto del_unicast;
+ }
+ if (dev->flags & IFF_PROMISC) {
+ err = dev_set_promiscuity(master, 1);
+ if (err < 0)
+ goto clear_allmulti;
+ }
+
+ return 0;
+
+clear_allmulti:
+ if (dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(master, -1);
+del_unicast:
+ if (compare_ether_addr(dev->dev_addr, master->dev_addr))
+ dev_uc_del(master, dev->dev_addr);
+out:
+ return err;
+}
+
+static int dsa_slave_close(struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct net_device *master = p->parent->dst->master_netdev;
+
+ dev_mc_unsync(master, dev);
+ dev_uc_unsync(master, dev);
+ if (dev->flags & IFF_ALLMULTI)
+ dev_set_allmulti(master, -1);
+ if (dev->flags & IFF_PROMISC)
+ dev_set_promiscuity(master, -1);
+
+ if (compare_ether_addr(dev->dev_addr, master->dev_addr))
+ dev_uc_del(master, dev->dev_addr);
+
+ return 0;
+}
+
+static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct net_device *master = p->parent->dst->master_netdev;
+
+ if (change & IFF_ALLMULTI)
+ dev_set_allmulti(master, dev->flags & IFF_ALLMULTI ? 1 : -1);
+ if (change & IFF_PROMISC)
+ dev_set_promiscuity(master, dev->flags & IFF_PROMISC ? 1 : -1);
+}
+
+static void dsa_slave_set_rx_mode(struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct net_device *master = p->parent->dst->master_netdev;
+
+ dev_mc_sync(master, dev);
+ dev_uc_sync(master, dev);
+}
+
+static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct net_device *master = p->parent->dst->master_netdev;
+ struct sockaddr *addr = a;
+ int err;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ if (!(dev->flags & IFF_UP))
+ goto out;
+
+ if (compare_ether_addr(addr->sa_data, master->dev_addr)) {
+ err = dev_uc_add(master, addr->sa_data);
+ if (err < 0)
+ return err;
+ }
+
+ if (compare_ether_addr(dev->dev_addr, master->dev_addr))
+ dev_uc_del(master, dev->dev_addr);
+
+out:
+ memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+
+ return 0;
+}
+
+static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+
+ if (p->phy != NULL)
+ return phy_mii_ioctl(p->phy, ifr, cmd);
+
+ return -EOPNOTSUPP;
+}
+
+
+/* ethtool operations *******************************************************/
+static int
+dsa_slave_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ int err;
+
+ err = -EOPNOTSUPP;
+ if (p->phy != NULL) {
+ err = phy_read_status(p->phy);
+ if (err == 0)
+ err = phy_ethtool_gset(p->phy, cmd);
+ }
+
+ return err;
+}
+
+static int
+dsa_slave_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+
+ if (p->phy != NULL)
+ return phy_ethtool_sset(p->phy, cmd);
+
+ return -EOPNOTSUPP;
+}
+
+static void dsa_slave_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *drvinfo)
+{
+ strncpy(drvinfo->driver, "dsa", 32);
+ strncpy(drvinfo->version, dsa_driver_version, 32);
+ strncpy(drvinfo->fw_version, "N/A", 32);
+ strncpy(drvinfo->bus_info, "platform", 32);
+}
+
+static int dsa_slave_nway_reset(struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+
+ if (p->phy != NULL)
+ return genphy_restart_aneg(p->phy);
+
+ return -EOPNOTSUPP;
+}
+
+static u32 dsa_slave_get_link(struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+
+ if (p->phy != NULL) {
+ genphy_update_link(p->phy);
+ return p->phy->link;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static void dsa_slave_get_strings(struct net_device *dev,
+ uint32_t stringset, uint8_t *data)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+
+ if (stringset == ETH_SS_STATS) {
+ int len = ETH_GSTRING_LEN;
+
+ strncpy(data, "tx_packets", len);
+ strncpy(data + len, "tx_bytes", len);
+ strncpy(data + 2 * len, "rx_packets", len);
+ strncpy(data + 3 * len, "rx_bytes", len);
+ if (ds->drv->get_strings != NULL)
+ ds->drv->get_strings(ds, p->port, data + 4 * len);
+ }
+}
+
+static void dsa_slave_get_ethtool_stats(struct net_device *dev,
+ struct ethtool_stats *stats,
+ uint64_t *data)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+
+ data[0] = p->dev->stats.tx_packets;
+ data[1] = p->dev->stats.tx_bytes;
+ data[2] = p->dev->stats.rx_packets;
+ data[3] = p->dev->stats.rx_bytes;
+ if (ds->drv->get_ethtool_stats != NULL)
+ ds->drv->get_ethtool_stats(ds, p->port, data + 4);
+}
+
+static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct dsa_switch *ds = p->parent;
+
+ if (sset == ETH_SS_STATS) {
+ int count;
+
+ count = 4;
+ if (ds->drv->get_sset_count != NULL)
+ count += ds->drv->get_sset_count(ds);
+
+ return count;
+ }
+
+ return -EOPNOTSUPP;
+}
+
+static const struct ethtool_ops dsa_slave_ethtool_ops = {
+ .get_settings = dsa_slave_get_settings,
+ .set_settings = dsa_slave_set_settings,
+ .get_drvinfo = dsa_slave_get_drvinfo,
+ .nway_reset = dsa_slave_nway_reset,
+ .get_link = dsa_slave_get_link,
+ .get_strings = dsa_slave_get_strings,
+ .get_ethtool_stats = dsa_slave_get_ethtool_stats,
+ .get_sset_count = dsa_slave_get_sset_count,
+};
+
+#ifdef CONFIG_NET_DSA_TAG_DSA
+static const struct net_device_ops dsa_netdev_ops = {
+ .ndo_init = dsa_slave_init,
+ .ndo_open = dsa_slave_open,
+ .ndo_stop = dsa_slave_close,
+ .ndo_start_xmit = dsa_xmit,
+ .ndo_change_rx_flags = dsa_slave_change_rx_flags,
+ .ndo_set_rx_mode = dsa_slave_set_rx_mode,
+ .ndo_set_mac_address = dsa_slave_set_mac_address,
+ .ndo_do_ioctl = dsa_slave_ioctl,
+};
+#endif
+#ifdef CONFIG_NET_DSA_TAG_EDSA
+static const struct net_device_ops edsa_netdev_ops = {
+ .ndo_init = dsa_slave_init,
+ .ndo_open = dsa_slave_open,
+ .ndo_stop = dsa_slave_close,
+ .ndo_start_xmit = edsa_xmit,
+ .ndo_change_rx_flags = dsa_slave_change_rx_flags,
+ .ndo_set_rx_mode = dsa_slave_set_rx_mode,
+ .ndo_set_mac_address = dsa_slave_set_mac_address,
+ .ndo_do_ioctl = dsa_slave_ioctl,
+};
+#endif
+#ifdef CONFIG_NET_DSA_TAG_TRAILER
+static const struct net_device_ops trailer_netdev_ops = {
+ .ndo_init = dsa_slave_init,
+ .ndo_open = dsa_slave_open,
+ .ndo_stop = dsa_slave_close,
+ .ndo_start_xmit = trailer_xmit,
+ .ndo_change_rx_flags = dsa_slave_change_rx_flags,
+ .ndo_set_rx_mode = dsa_slave_set_rx_mode,
+ .ndo_set_mac_address = dsa_slave_set_mac_address,
+ .ndo_do_ioctl = dsa_slave_ioctl,
+};
+#endif
+
+/* slave device setup *******************************************************/
+struct net_device *
+dsa_slave_create(struct dsa_switch *ds, struct device *parent,
+ int port, char *name)
+{
+ struct net_device *master = ds->dst->master_netdev;
+ struct net_device *slave_dev;
+ struct dsa_slave_priv *p;
+ int ret;
+
+ slave_dev = alloc_netdev(sizeof(struct dsa_slave_priv),
+ name, ether_setup);
+ if (slave_dev == NULL)
+ return slave_dev;
+
+ slave_dev->features = master->vlan_features;
+ SET_ETHTOOL_OPS(slave_dev, &dsa_slave_ethtool_ops);
+ memcpy(slave_dev->dev_addr, master->dev_addr, ETH_ALEN);
+ slave_dev->tx_queue_len = 0;
+
+ switch (ds->dst->tag_protocol) {
+#ifdef CONFIG_NET_DSA_TAG_DSA
+ case htons(ETH_P_DSA):
+ slave_dev->netdev_ops = &dsa_netdev_ops;
+ break;
+#endif
+#ifdef CONFIG_NET_DSA_TAG_EDSA
+ case htons(ETH_P_EDSA):
+ slave_dev->netdev_ops = &edsa_netdev_ops;
+ break;
+#endif
+#ifdef CONFIG_NET_DSA_TAG_TRAILER
+ case htons(ETH_P_TRAILER):
+ slave_dev->netdev_ops = &trailer_netdev_ops;
+ break;
+#endif
+ default:
+ BUG();
+ }
+
+ SET_NETDEV_DEV(slave_dev, parent);
+ slave_dev->vlan_features = master->vlan_features;
+
+ p = netdev_priv(slave_dev);
+ p->dev = slave_dev;
+ p->parent = ds;
+ p->port = port;
+ p->phy = ds->slave_mii_bus->phy_map[port];
+
+ ret = register_netdev(slave_dev);
+ if (ret) {
+ printk(KERN_ERR "%s: error %d registering interface %s\n",
+ master->name, ret, slave_dev->name);
+ free_netdev(slave_dev);
+ return NULL;
+ }
+
+ netif_carrier_off(slave_dev);
+
+ if (p->phy != NULL) {
+ phy_attach(slave_dev, dev_name(&p->phy->dev),
+ 0, PHY_INTERFACE_MODE_GMII);
+
+ p->phy->autoneg = AUTONEG_ENABLE;
+ p->phy->speed = 0;
+ p->phy->duplex = 0;
+ p->phy->advertising = p->phy->supported | ADVERTISED_Autoneg;
+ phy_start_aneg(p->phy);
+ }
+
+ return slave_dev;
+}
diff --git a/net/dsa/tag_dsa.c b/net/dsa/tag_dsa.c
new file mode 100644
index 00000000..cacce1e2
--- /dev/null
+++ b/net/dsa/tag_dsa.c
@@ -0,0 +1,192 @@
+/*
+ * net/dsa/tag_dsa.c - (Non-ethertype) DSA tagging
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include "dsa_priv.h"
+
+#define DSA_HLEN 4
+
+netdev_tx_t dsa_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ u8 *dsa_header;
+
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ /*
+ * Convert the outermost 802.1q tag to a DSA tag for tagged
+ * packets, or insert a DSA tag between the addresses and
+ * the ethertype field for untagged packets.
+ */
+ if (skb->protocol == htons(ETH_P_8021Q)) {
+ if (skb_cow_head(skb, 0) < 0)
+ goto out_free;
+
+ /*
+ * Construct tagged FROM_CPU DSA tag from 802.1q tag.
+ */
+ dsa_header = skb->data + 2 * ETH_ALEN;
+ dsa_header[0] = 0x60 | p->parent->index;
+ dsa_header[1] = p->port << 3;
+
+ /*
+ * Move CFI field from byte 2 to byte 1.
+ */
+ if (dsa_header[2] & 0x10) {
+ dsa_header[1] |= 0x01;
+ dsa_header[2] &= ~0x10;
+ }
+ } else {
+ if (skb_cow_head(skb, DSA_HLEN) < 0)
+ goto out_free;
+ skb_push(skb, DSA_HLEN);
+
+ memmove(skb->data, skb->data + DSA_HLEN, 2 * ETH_ALEN);
+
+ /*
+ * Construct untagged FROM_CPU DSA tag.
+ */
+ dsa_header = skb->data + 2 * ETH_ALEN;
+ dsa_header[0] = 0x40 | p->parent->index;
+ dsa_header[1] = p->port << 3;
+ dsa_header[2] = 0x00;
+ dsa_header[3] = 0x00;
+ }
+
+ skb->protocol = htons(ETH_P_DSA);
+
+ skb->dev = p->parent->dst->master_netdev;
+ dev_queue_xmit(skb);
+
+ return NETDEV_TX_OK;
+
+out_free:
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+static int dsa_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev)
+{
+ struct dsa_switch_tree *dst = dev->dsa_ptr;
+ struct dsa_switch *ds;
+ u8 *dsa_header;
+ int source_device;
+ int source_port;
+
+ if (unlikely(dst == NULL))
+ goto out_drop;
+
+ skb = skb_unshare(skb, GFP_ATOMIC);
+ if (skb == NULL)
+ goto out;
+
+ if (unlikely(!pskb_may_pull(skb, DSA_HLEN)))
+ goto out_drop;
+
+ /*
+ * The ethertype field is part of the DSA header.
+ */
+ dsa_header = skb->data - 2;
+
+ /*
+ * Check that frame type is either TO_CPU or FORWARD.
+ */
+ if ((dsa_header[0] & 0xc0) != 0x00 && (dsa_header[0] & 0xc0) != 0xc0)
+ goto out_drop;
+
+ /*
+ * Determine source device and port.
+ */
+ source_device = dsa_header[0] & 0x1f;
+ source_port = (dsa_header[1] >> 3) & 0x1f;
+
+ /*
+ * Check that the source device exists and that the source
+ * port is a registered DSA port.
+ */
+ if (source_device >= dst->pd->nr_chips)
+ goto out_drop;
+ ds = dst->ds[source_device];
+ if (source_port >= DSA_MAX_PORTS || ds->ports[source_port] == NULL)
+ goto out_drop;
+
+ /*
+ * Convert the DSA header to an 802.1q header if the 'tagged'
+ * bit in the DSA header is set. If the 'tagged' bit is clear,
+ * delete the DSA header entirely.
+ */
+ if (dsa_header[0] & 0x20) {
+ u8 new_header[4];
+
+ /*
+ * Insert 802.1q ethertype and copy the VLAN-related
+ * fields, but clear the bit that will hold CFI (since
+ * DSA uses that bit location for another purpose).
+ */
+ new_header[0] = (ETH_P_8021Q >> 8) & 0xff;
+ new_header[1] = ETH_P_8021Q & 0xff;
+ new_header[2] = dsa_header[2] & ~0x10;
+ new_header[3] = dsa_header[3];
+
+ /*
+ * Move CFI bit from its place in the DSA header to
+ * its 802.1q-designated place.
+ */
+ if (dsa_header[1] & 0x01)
+ new_header[2] |= 0x10;
+
+ /*
+ * Update packet checksum if skb is CHECKSUM_COMPLETE.
+ */
+ if (skb->ip_summed == CHECKSUM_COMPLETE) {
+ __wsum c = skb->csum;
+ c = csum_add(c, csum_partial(new_header + 2, 2, 0));
+ c = csum_sub(c, csum_partial(dsa_header + 2, 2, 0));
+ skb->csum = c;
+ }
+
+ memcpy(dsa_header, new_header, DSA_HLEN);
+ } else {
+ /*
+ * Remove DSA tag and update checksum.
+ */
+ skb_pull_rcsum(skb, DSA_HLEN);
+ memmove(skb->data - ETH_HLEN,
+ skb->data - ETH_HLEN - DSA_HLEN,
+ 2 * ETH_ALEN);
+ }
+
+ skb->dev = ds->ports[source_port];
+ skb_push(skb, ETH_HLEN);
+ skb->pkt_type = PACKET_HOST;
+ skb->protocol = eth_type_trans(skb, skb->dev);
+
+ skb->dev->stats.rx_packets++;
+ skb->dev->stats.rx_bytes += skb->len;
+
+ netif_receive_skb(skb);
+
+ return 0;
+
+out_drop:
+ kfree_skb(skb);
+out:
+ return 0;
+}
+
+struct packet_type dsa_packet_type __read_mostly = {
+ .type = cpu_to_be16(ETH_P_DSA),
+ .func = dsa_rcv,
+};
diff --git a/net/dsa/tag_edsa.c b/net/dsa/tag_edsa.c
new file mode 100644
index 00000000..e70c43c2
--- /dev/null
+++ b/net/dsa/tag_edsa.c
@@ -0,0 +1,211 @@
+/*
+ * net/dsa/tag_edsa.c - Ethertype DSA tagging
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include "dsa_priv.h"
+
+#define DSA_HLEN 4
+#define EDSA_HLEN 8
+
+netdev_tx_t edsa_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ u8 *edsa_header;
+
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ /*
+ * Convert the outermost 802.1q tag to a DSA tag and prepend
+ * a DSA ethertype field is the packet is tagged, or insert
+ * a DSA ethertype plus DSA tag between the addresses and the
+ * current ethertype field if the packet is untagged.
+ */
+ if (skb->protocol == htons(ETH_P_8021Q)) {
+ if (skb_cow_head(skb, DSA_HLEN) < 0)
+ goto out_free;
+ skb_push(skb, DSA_HLEN);
+
+ memmove(skb->data, skb->data + DSA_HLEN, 2 * ETH_ALEN);
+
+ /*
+ * Construct tagged FROM_CPU DSA tag from 802.1q tag.
+ */
+ edsa_header = skb->data + 2 * ETH_ALEN;
+ edsa_header[0] = (ETH_P_EDSA >> 8) & 0xff;
+ edsa_header[1] = ETH_P_EDSA & 0xff;
+ edsa_header[2] = 0x00;
+ edsa_header[3] = 0x00;
+ edsa_header[4] = 0x60 | p->parent->index;
+ edsa_header[5] = p->port << 3;
+
+ /*
+ * Move CFI field from byte 6 to byte 5.
+ */
+ if (edsa_header[6] & 0x10) {
+ edsa_header[5] |= 0x01;
+ edsa_header[6] &= ~0x10;
+ }
+ } else {
+ if (skb_cow_head(skb, EDSA_HLEN) < 0)
+ goto out_free;
+ skb_push(skb, EDSA_HLEN);
+
+ memmove(skb->data, skb->data + EDSA_HLEN, 2 * ETH_ALEN);
+
+ /*
+ * Construct untagged FROM_CPU DSA tag.
+ */
+ edsa_header = skb->data + 2 * ETH_ALEN;
+ edsa_header[0] = (ETH_P_EDSA >> 8) & 0xff;
+ edsa_header[1] = ETH_P_EDSA & 0xff;
+ edsa_header[2] = 0x00;
+ edsa_header[3] = 0x00;
+ edsa_header[4] = 0x40 | p->parent->index;
+ edsa_header[5] = p->port << 3;
+ edsa_header[6] = 0x00;
+ edsa_header[7] = 0x00;
+ }
+
+ skb->protocol = htons(ETH_P_EDSA);
+
+ skb->dev = p->parent->dst->master_netdev;
+ dev_queue_xmit(skb);
+
+ return NETDEV_TX_OK;
+
+out_free:
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+static int edsa_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev)
+{
+ struct dsa_switch_tree *dst = dev->dsa_ptr;
+ struct dsa_switch *ds;
+ u8 *edsa_header;
+ int source_device;
+ int source_port;
+
+ if (unlikely(dst == NULL))
+ goto out_drop;
+
+ skb = skb_unshare(skb, GFP_ATOMIC);
+ if (skb == NULL)
+ goto out;
+
+ if (unlikely(!pskb_may_pull(skb, EDSA_HLEN)))
+ goto out_drop;
+
+ /*
+ * Skip the two null bytes after the ethertype.
+ */
+ edsa_header = skb->data + 2;
+
+ /*
+ * Check that frame type is either TO_CPU or FORWARD.
+ */
+ if ((edsa_header[0] & 0xc0) != 0x00 && (edsa_header[0] & 0xc0) != 0xc0)
+ goto out_drop;
+
+ /*
+ * Determine source device and port.
+ */
+ source_device = edsa_header[0] & 0x1f;
+ source_port = (edsa_header[1] >> 3) & 0x1f;
+
+ /*
+ * Check that the source device exists and that the source
+ * port is a registered DSA port.
+ */
+ if (source_device >= dst->pd->nr_chips)
+ goto out_drop;
+ ds = dst->ds[source_device];
+ if (source_port >= DSA_MAX_PORTS || ds->ports[source_port] == NULL)
+ goto out_drop;
+
+ /*
+ * If the 'tagged' bit is set, convert the DSA tag to a 802.1q
+ * tag and delete the ethertype part. If the 'tagged' bit is
+ * clear, delete the ethertype and the DSA tag parts.
+ */
+ if (edsa_header[0] & 0x20) {
+ u8 new_header[4];
+
+ /*
+ * Insert 802.1q ethertype and copy the VLAN-related
+ * fields, but clear the bit that will hold CFI (since
+ * DSA uses that bit location for another purpose).
+ */
+ new_header[0] = (ETH_P_8021Q >> 8) & 0xff;
+ new_header[1] = ETH_P_8021Q & 0xff;
+ new_header[2] = edsa_header[2] & ~0x10;
+ new_header[3] = edsa_header[3];
+
+ /*
+ * Move CFI bit from its place in the DSA header to
+ * its 802.1q-designated place.
+ */
+ if (edsa_header[1] & 0x01)
+ new_header[2] |= 0x10;
+
+ skb_pull_rcsum(skb, DSA_HLEN);
+
+ /*
+ * Update packet checksum if skb is CHECKSUM_COMPLETE.
+ */
+ if (skb->ip_summed == CHECKSUM_COMPLETE) {
+ __wsum c = skb->csum;
+ c = csum_add(c, csum_partial(new_header + 2, 2, 0));
+ c = csum_sub(c, csum_partial(edsa_header + 2, 2, 0));
+ skb->csum = c;
+ }
+
+ memcpy(edsa_header, new_header, DSA_HLEN);
+
+ memmove(skb->data - ETH_HLEN,
+ skb->data - ETH_HLEN - DSA_HLEN,
+ 2 * ETH_ALEN);
+ } else {
+ /*
+ * Remove DSA tag and update checksum.
+ */
+ skb_pull_rcsum(skb, EDSA_HLEN);
+ memmove(skb->data - ETH_HLEN,
+ skb->data - ETH_HLEN - EDSA_HLEN,
+ 2 * ETH_ALEN);
+ }
+
+ skb->dev = ds->ports[source_port];
+ skb_push(skb, ETH_HLEN);
+ skb->pkt_type = PACKET_HOST;
+ skb->protocol = eth_type_trans(skb, skb->dev);
+
+ skb->dev->stats.rx_packets++;
+ skb->dev->stats.rx_bytes += skb->len;
+
+ netif_receive_skb(skb);
+
+ return 0;
+
+out_drop:
+ kfree_skb(skb);
+out:
+ return 0;
+}
+
+struct packet_type edsa_packet_type __read_mostly = {
+ .type = cpu_to_be16(ETH_P_EDSA),
+ .func = edsa_rcv,
+};
diff --git a/net/dsa/tag_trailer.c b/net/dsa/tag_trailer.c
new file mode 100644
index 00000000..94bc260d
--- /dev/null
+++ b/net/dsa/tag_trailer.c
@@ -0,0 +1,120 @@
+/*
+ * net/dsa/tag_trailer.c - Trailer tag format handling
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/etherdevice.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include "dsa_priv.h"
+
+netdev_tx_t trailer_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct dsa_slave_priv *p = netdev_priv(dev);
+ struct sk_buff *nskb;
+ int padlen;
+ u8 *trailer;
+
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ /*
+ * We have to make sure that the trailer ends up as the very
+ * last 4 bytes of the packet. This means that we have to pad
+ * the packet to the minimum ethernet frame size, if necessary,
+ * before adding the trailer.
+ */
+ padlen = 0;
+ if (skb->len < 60)
+ padlen = 60 - skb->len;
+
+ nskb = alloc_skb(NET_IP_ALIGN + skb->len + padlen + 4, GFP_ATOMIC);
+ if (nskb == NULL) {
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+ skb_reserve(nskb, NET_IP_ALIGN);
+
+ skb_reset_mac_header(nskb);
+ skb_set_network_header(nskb, skb_network_header(skb) - skb->head);
+ skb_set_transport_header(nskb, skb_transport_header(skb) - skb->head);
+ skb_copy_and_csum_dev(skb, skb_put(nskb, skb->len));
+ kfree_skb(skb);
+
+ if (padlen) {
+ u8 *pad = skb_put(nskb, padlen);
+ memset(pad, 0, padlen);
+ }
+
+ trailer = skb_put(nskb, 4);
+ trailer[0] = 0x80;
+ trailer[1] = 1 << p->port;
+ trailer[2] = 0x10;
+ trailer[3] = 0x00;
+
+ nskb->protocol = htons(ETH_P_TRAILER);
+
+ nskb->dev = p->parent->dst->master_netdev;
+ dev_queue_xmit(nskb);
+
+ return NETDEV_TX_OK;
+}
+
+static int trailer_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev)
+{
+ struct dsa_switch_tree *dst = dev->dsa_ptr;
+ struct dsa_switch *ds;
+ u8 *trailer;
+ int source_port;
+
+ if (unlikely(dst == NULL))
+ goto out_drop;
+ ds = dst->ds[0];
+
+ skb = skb_unshare(skb, GFP_ATOMIC);
+ if (skb == NULL)
+ goto out;
+
+ if (skb_linearize(skb))
+ goto out_drop;
+
+ trailer = skb_tail_pointer(skb) - 4;
+ if (trailer[0] != 0x80 || (trailer[1] & 0xf8) != 0x00 ||
+ (trailer[3] & 0xef) != 0x00 || trailer[3] != 0x00)
+ goto out_drop;
+
+ source_port = trailer[1] & 7;
+ if (source_port >= DSA_MAX_PORTS || ds->ports[source_port] == NULL)
+ goto out_drop;
+
+ pskb_trim_rcsum(skb, skb->len - 4);
+
+ skb->dev = ds->ports[source_port];
+ skb_push(skb, ETH_HLEN);
+ skb->pkt_type = PACKET_HOST;
+ skb->protocol = eth_type_trans(skb, skb->dev);
+
+ skb->dev->stats.rx_packets++;
+ skb->dev->stats.rx_bytes += skb->len;
+
+ netif_receive_skb(skb);
+
+ return 0;
+
+out_drop:
+ kfree_skb(skb);
+out:
+ return 0;
+}
+
+struct packet_type trailer_packet_type __read_mostly = {
+ .type = cpu_to_be16(ETH_P_TRAILER),
+ .func = trailer_rcv,
+};
generated by cgit (git 2.34.1) at 2024-12-20 18:26:57 +0000