mirror of https://gitee.com/openkylin/linux.git
1138 lines
24 KiB
C
1138 lines
24 KiB
C
/*
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* net/dsa/dsa.c - Hardware switch handling
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* Copyright (c) 2008-2009 Marvell Semiconductor
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* Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/ctype.h>
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#include <linux/device.h>
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#include <linux/hwmon.h>
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#include <linux/list.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <net/dsa.h>
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#include <linux/of.h>
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#include <linux/of_mdio.h>
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#include <linux/of_platform.h>
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#include <linux/of_net.h>
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#include <linux/of_gpio.h>
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#include <linux/sysfs.h>
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#include <linux/phy_fixed.h>
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#include <linux/gpio/consumer.h>
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#include "dsa_priv.h"
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char dsa_driver_version[] = "0.1";
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static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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/* Just return the original SKB */
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return skb;
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}
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static const struct dsa_device_ops none_ops = {
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.xmit = dsa_slave_notag_xmit,
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.rcv = NULL,
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};
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const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = {
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#ifdef CONFIG_NET_DSA_TAG_DSA
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[DSA_TAG_PROTO_DSA] = &dsa_netdev_ops,
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#endif
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#ifdef CONFIG_NET_DSA_TAG_EDSA
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[DSA_TAG_PROTO_EDSA] = &edsa_netdev_ops,
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#endif
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#ifdef CONFIG_NET_DSA_TAG_TRAILER
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[DSA_TAG_PROTO_TRAILER] = &trailer_netdev_ops,
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#endif
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#ifdef CONFIG_NET_DSA_TAG_BRCM
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[DSA_TAG_PROTO_BRCM] = &brcm_netdev_ops,
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#endif
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[DSA_TAG_PROTO_NONE] = &none_ops,
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};
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/* switch driver registration ***********************************************/
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static DEFINE_MUTEX(dsa_switch_drivers_mutex);
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static LIST_HEAD(dsa_switch_drivers);
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void register_switch_driver(struct dsa_switch_driver *drv)
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{
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mutex_lock(&dsa_switch_drivers_mutex);
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list_add_tail(&drv->list, &dsa_switch_drivers);
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mutex_unlock(&dsa_switch_drivers_mutex);
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}
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EXPORT_SYMBOL_GPL(register_switch_driver);
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void unregister_switch_driver(struct dsa_switch_driver *drv)
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{
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mutex_lock(&dsa_switch_drivers_mutex);
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list_del_init(&drv->list);
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mutex_unlock(&dsa_switch_drivers_mutex);
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}
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EXPORT_SYMBOL_GPL(unregister_switch_driver);
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static struct dsa_switch_driver *
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dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr,
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const char **_name, void **priv)
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{
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struct dsa_switch_driver *ret;
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struct list_head *list;
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const char *name;
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ret = NULL;
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name = NULL;
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mutex_lock(&dsa_switch_drivers_mutex);
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list_for_each(list, &dsa_switch_drivers) {
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struct dsa_switch_driver *drv;
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drv = list_entry(list, struct dsa_switch_driver, list);
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name = drv->probe(parent, host_dev, sw_addr, priv);
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if (name != NULL) {
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ret = drv;
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break;
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}
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}
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mutex_unlock(&dsa_switch_drivers_mutex);
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*_name = name;
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return ret;
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}
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/* hwmon support ************************************************************/
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#ifdef CONFIG_NET_DSA_HWMON
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static ssize_t temp1_input_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct dsa_switch *ds = dev_get_drvdata(dev);
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int temp, ret;
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ret = ds->drv->get_temp(ds, &temp);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%d\n", temp * 1000);
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}
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static DEVICE_ATTR_RO(temp1_input);
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static ssize_t temp1_max_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct dsa_switch *ds = dev_get_drvdata(dev);
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int temp, ret;
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ret = ds->drv->get_temp_limit(ds, &temp);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%d\n", temp * 1000);
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}
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static ssize_t temp1_max_store(struct device *dev,
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struct device_attribute *attr, const char *buf,
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size_t count)
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{
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struct dsa_switch *ds = dev_get_drvdata(dev);
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int temp, ret;
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ret = kstrtoint(buf, 0, &temp);
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if (ret < 0)
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return ret;
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ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000));
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if (ret < 0)
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return ret;
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return count;
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}
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static DEVICE_ATTR_RW(temp1_max);
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static ssize_t temp1_max_alarm_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct dsa_switch *ds = dev_get_drvdata(dev);
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bool alarm;
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int ret;
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ret = ds->drv->get_temp_alarm(ds, &alarm);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%d\n", alarm);
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}
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static DEVICE_ATTR_RO(temp1_max_alarm);
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static struct attribute *dsa_hwmon_attrs[] = {
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&dev_attr_temp1_input.attr, /* 0 */
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&dev_attr_temp1_max.attr, /* 1 */
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&dev_attr_temp1_max_alarm.attr, /* 2 */
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NULL
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};
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static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj,
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struct attribute *attr, int index)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct dsa_switch *ds = dev_get_drvdata(dev);
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struct dsa_switch_driver *drv = ds->drv;
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umode_t mode = attr->mode;
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if (index == 1) {
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if (!drv->get_temp_limit)
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mode = 0;
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else if (!drv->set_temp_limit)
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mode &= ~S_IWUSR;
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} else if (index == 2 && !drv->get_temp_alarm) {
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mode = 0;
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}
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return mode;
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}
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static const struct attribute_group dsa_hwmon_group = {
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.attrs = dsa_hwmon_attrs,
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.is_visible = dsa_hwmon_attrs_visible,
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};
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__ATTRIBUTE_GROUPS(dsa_hwmon);
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#endif /* CONFIG_NET_DSA_HWMON */
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/* basic switch operations **************************************************/
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int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
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struct device_node *port_dn, int port)
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{
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struct phy_device *phydev;
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int ret, mode;
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if (of_phy_is_fixed_link(port_dn)) {
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ret = of_phy_register_fixed_link(port_dn);
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if (ret) {
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dev_err(dev, "failed to register fixed PHY\n");
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return ret;
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}
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phydev = of_phy_find_device(port_dn);
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mode = of_get_phy_mode(port_dn);
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if (mode < 0)
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mode = PHY_INTERFACE_MODE_NA;
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phydev->interface = mode;
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genphy_config_init(phydev);
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genphy_read_status(phydev);
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if (ds->drv->adjust_link)
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ds->drv->adjust_link(ds, port, phydev);
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}
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return 0;
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}
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static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev)
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{
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struct device_node *port_dn;
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int ret, port;
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for (port = 0; port < DSA_MAX_PORTS; port++) {
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if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
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continue;
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port_dn = ds->ports[port].dn;
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ret = dsa_cpu_dsa_setup(ds, dev, port_dn, port);
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if (ret)
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return ret;
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}
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return 0;
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}
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const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol)
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{
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const struct dsa_device_ops *ops;
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if (tag_protocol >= DSA_TAG_LAST)
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return ERR_PTR(-EINVAL);
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ops = dsa_device_ops[tag_protocol];
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if (!ops)
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return ERR_PTR(-ENOPROTOOPT);
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return ops;
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}
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int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds)
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{
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struct net_device *master;
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struct ethtool_ops *cpu_ops;
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master = ds->dst->master_netdev;
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if (ds->master_netdev)
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master = ds->master_netdev;
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cpu_ops = devm_kzalloc(ds->dev, sizeof(*cpu_ops), GFP_KERNEL);
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if (!cpu_ops)
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return -ENOMEM;
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memcpy(&ds->dst->master_ethtool_ops, master->ethtool_ops,
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sizeof(struct ethtool_ops));
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ds->dst->master_orig_ethtool_ops = master->ethtool_ops;
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memcpy(cpu_ops, &ds->dst->master_ethtool_ops,
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sizeof(struct ethtool_ops));
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dsa_cpu_port_ethtool_init(cpu_ops);
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master->ethtool_ops = cpu_ops;
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return 0;
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}
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void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds)
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{
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struct net_device *master;
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master = ds->dst->master_netdev;
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if (ds->master_netdev)
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master = ds->master_netdev;
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master->ethtool_ops = ds->dst->master_orig_ethtool_ops;
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}
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static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
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{
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struct dsa_switch_driver *drv = ds->drv;
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struct dsa_switch_tree *dst = ds->dst;
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struct dsa_chip_data *cd = ds->cd;
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bool valid_name_found = false;
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int index = ds->index;
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int i, ret;
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/*
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* Validate supplied switch configuration.
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*/
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for (i = 0; i < DSA_MAX_PORTS; i++) {
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char *name;
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name = cd->port_names[i];
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if (name == NULL)
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continue;
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if (!strcmp(name, "cpu")) {
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if (dst->cpu_switch != -1) {
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netdev_err(dst->master_netdev,
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"multiple cpu ports?!\n");
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ret = -EINVAL;
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goto out;
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}
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dst->cpu_switch = index;
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dst->cpu_port = i;
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ds->cpu_port_mask |= 1 << i;
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} else if (!strcmp(name, "dsa")) {
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ds->dsa_port_mask |= 1 << i;
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} else {
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ds->enabled_port_mask |= 1 << i;
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}
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valid_name_found = true;
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}
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if (!valid_name_found && i == DSA_MAX_PORTS) {
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ret = -EINVAL;
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goto out;
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}
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/* Make the built-in MII bus mask match the number of ports,
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* switch drivers can override this later
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*/
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ds->phys_mii_mask = ds->enabled_port_mask;
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/*
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* If the CPU connects to this switch, set the switch tree
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* tagging protocol to the preferred tagging format of this
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* switch.
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*/
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if (dst->cpu_switch == index) {
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enum dsa_tag_protocol tag_protocol;
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tag_protocol = drv->get_tag_protocol(ds);
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dst->tag_ops = dsa_resolve_tag_protocol(tag_protocol);
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if (IS_ERR(dst->tag_ops)) {
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ret = PTR_ERR(dst->tag_ops);
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goto out;
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}
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dst->rcv = dst->tag_ops->rcv;
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}
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memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable));
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/*
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* Do basic register setup.
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*/
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ret = drv->setup(ds);
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if (ret < 0)
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goto out;
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ret = drv->set_addr(ds, dst->master_netdev->dev_addr);
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if (ret < 0)
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goto out;
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if (!ds->slave_mii_bus && drv->phy_read) {
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ds->slave_mii_bus = devm_mdiobus_alloc(parent);
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if (!ds->slave_mii_bus) {
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ret = -ENOMEM;
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goto out;
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}
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dsa_slave_mii_bus_init(ds);
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ret = mdiobus_register(ds->slave_mii_bus);
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if (ret < 0)
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goto out;
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}
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/*
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* Create network devices for physical switch ports.
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*/
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for (i = 0; i < DSA_MAX_PORTS; i++) {
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ds->ports[i].dn = cd->port_dn[i];
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if (!(ds->enabled_port_mask & (1 << i)))
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continue;
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ret = dsa_slave_create(ds, parent, i, cd->port_names[i]);
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if (ret < 0) {
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netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s): %d\n",
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index, i, cd->port_names[i], ret);
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ret = 0;
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}
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}
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/* Perform configuration of the CPU and DSA ports */
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ret = dsa_cpu_dsa_setups(ds, parent);
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if (ret < 0) {
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netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n",
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index);
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ret = 0;
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}
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ret = dsa_cpu_port_ethtool_setup(ds);
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if (ret)
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return ret;
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#ifdef CONFIG_NET_DSA_HWMON
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/* If the switch provides a temperature sensor,
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* register with hardware monitoring subsystem.
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* Treat registration error as non-fatal and ignore it.
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*/
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if (drv->get_temp) {
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const char *netname = netdev_name(dst->master_netdev);
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char hname[IFNAMSIZ + 1];
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int i, j;
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/* Create valid hwmon 'name' attribute */
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for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) {
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if (isalnum(netname[i]))
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hname[j++] = netname[i];
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}
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hname[j] = '\0';
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scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d",
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hname, index);
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ds->hwmon_dev = hwmon_device_register_with_groups(NULL,
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ds->hwmon_name, ds, dsa_hwmon_groups);
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if (IS_ERR(ds->hwmon_dev))
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ds->hwmon_dev = NULL;
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}
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#endif /* CONFIG_NET_DSA_HWMON */
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return ret;
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out:
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return ret;
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}
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|
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static struct dsa_switch *
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dsa_switch_setup(struct dsa_switch_tree *dst, int index,
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struct device *parent, struct device *host_dev)
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{
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struct dsa_chip_data *cd = dst->pd->chip + index;
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struct dsa_switch_driver *drv;
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struct dsa_switch *ds;
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int ret;
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const char *name;
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void *priv;
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/*
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* Probe for switch model.
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*/
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drv = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv);
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if (drv == NULL) {
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netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n",
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index);
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return ERR_PTR(-EINVAL);
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}
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netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n",
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index, name);
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|
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/*
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* Allocate and initialise switch state.
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*/
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ds = devm_kzalloc(parent, sizeof(*ds), GFP_KERNEL);
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if (ds == NULL)
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return ERR_PTR(-ENOMEM);
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ds->dst = dst;
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ds->index = index;
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ds->cd = cd;
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ds->drv = drv;
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ds->priv = priv;
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ds->dev = parent;
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ret = dsa_switch_setup_one(ds, parent);
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if (ret)
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return ERR_PTR(ret);
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return ds;
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}
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|
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void dsa_cpu_dsa_destroy(struct device_node *port_dn)
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{
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struct phy_device *phydev;
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if (of_phy_is_fixed_link(port_dn)) {
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phydev = of_phy_find_device(port_dn);
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if (phydev) {
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phy_device_free(phydev);
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fixed_phy_unregister(phydev);
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}
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}
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}
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|
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static void dsa_switch_destroy(struct dsa_switch *ds)
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{
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int port;
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|
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#ifdef CONFIG_NET_DSA_HWMON
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if (ds->hwmon_dev)
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hwmon_device_unregister(ds->hwmon_dev);
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#endif
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|
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/* Destroy network devices for physical switch ports. */
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for (port = 0; port < DSA_MAX_PORTS; port++) {
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if (!(ds->enabled_port_mask & (1 << port)))
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continue;
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|
|
if (!ds->ports[port].netdev)
|
|
continue;
|
|
|
|
dsa_slave_destroy(ds->ports[port].netdev);
|
|
}
|
|
|
|
/* Disable configuration of the CPU and DSA ports */
|
|
for (port = 0; port < DSA_MAX_PORTS; port++) {
|
|
if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
|
|
continue;
|
|
dsa_cpu_dsa_destroy(ds->ports[port].dn);
|
|
|
|
/* Clearing a bit which is not set does no harm */
|
|
ds->cpu_port_mask |= ~(1 << port);
|
|
ds->dsa_port_mask |= ~(1 << port);
|
|
}
|
|
|
|
if (ds->slave_mii_bus && ds->drv->phy_read)
|
|
mdiobus_unregister(ds->slave_mii_bus);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
int dsa_switch_suspend(struct dsa_switch *ds)
|
|
{
|
|
int i, ret = 0;
|
|
|
|
/* Suspend slave network devices */
|
|
for (i = 0; i < DSA_MAX_PORTS; i++) {
|
|
if (!dsa_is_port_initialized(ds, i))
|
|
continue;
|
|
|
|
ret = dsa_slave_suspend(ds->ports[i].netdev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (ds->drv->suspend)
|
|
ret = ds->drv->suspend(ds);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_switch_suspend);
|
|
|
|
int dsa_switch_resume(struct dsa_switch *ds)
|
|
{
|
|
int i, ret = 0;
|
|
|
|
if (ds->drv->resume)
|
|
ret = ds->drv->resume(ds);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Resume slave network devices */
|
|
for (i = 0; i < DSA_MAX_PORTS; i++) {
|
|
if (!dsa_is_port_initialized(ds, i))
|
|
continue;
|
|
|
|
ret = dsa_slave_resume(ds->ports[i].netdev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_switch_resume);
|
|
#endif
|
|
|
|
/* 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);
|
|
}
|
|
|
|
struct mii_bus *dsa_host_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;
|
|
}
|
|
EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
|
|
struct dsa_chip_data *cd,
|
|
int chip_index, int port_index,
|
|
struct device_node *link)
|
|
{
|
|
const __be32 *reg;
|
|
int link_sw_addr;
|
|
struct device_node *parent_sw;
|
|
int len;
|
|
|
|
parent_sw = of_get_parent(link);
|
|
if (!parent_sw)
|
|
return -EINVAL;
|
|
|
|
reg = of_get_property(parent_sw, "reg", &len);
|
|
if (!reg || (len != sizeof(*reg) * 2))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Get the destination switch number from the second field of its 'reg'
|
|
* property, i.e. for "reg = <0x19 1>" sw_addr is '1'.
|
|
*/
|
|
link_sw_addr = be32_to_cpup(reg + 1);
|
|
|
|
if (link_sw_addr >= pd->nr_chips)
|
|
return -EINVAL;
|
|
|
|
cd->rtable[link_sw_addr] = port_index;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_of_probe_links(struct dsa_platform_data *pd,
|
|
struct dsa_chip_data *cd,
|
|
int chip_index, int port_index,
|
|
struct device_node *port,
|
|
const char *port_name)
|
|
{
|
|
struct device_node *link;
|
|
int link_index;
|
|
int ret;
|
|
|
|
for (link_index = 0;; link_index++) {
|
|
link = of_parse_phandle(port, "link", link_index);
|
|
if (!link)
|
|
break;
|
|
|
|
if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) {
|
|
ret = dsa_of_setup_routing_table(pd, cd, chip_index,
|
|
port_index, link);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void dsa_of_free_platform_data(struct dsa_platform_data *pd)
|
|
{
|
|
int i;
|
|
int port_index;
|
|
|
|
for (i = 0; i < pd->nr_chips; i++) {
|
|
port_index = 0;
|
|
while (port_index < DSA_MAX_PORTS) {
|
|
kfree(pd->chip[i].port_names[port_index]);
|
|
port_index++;
|
|
}
|
|
|
|
/* Drop our reference to the MDIO bus device */
|
|
if (pd->chip[i].host_dev)
|
|
put_device(pd->chip[i].host_dev);
|
|
}
|
|
kfree(pd->chip);
|
|
}
|
|
|
|
static int dsa_of_probe(struct device *dev)
|
|
{
|
|
struct device_node *np = dev->of_node;
|
|
struct device_node *child, *mdio, *ethernet, *port;
|
|
struct mii_bus *mdio_bus, *mdio_bus_switch;
|
|
struct net_device *ethernet_dev;
|
|
struct dsa_platform_data *pd;
|
|
struct dsa_chip_data *cd;
|
|
const char *port_name;
|
|
int chip_index, port_index;
|
|
const unsigned int *sw_addr, *port_reg;
|
|
u32 eeprom_len;
|
|
int ret;
|
|
|
|
mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
|
|
if (!mdio)
|
|
return -EINVAL;
|
|
|
|
mdio_bus = of_mdio_find_bus(mdio);
|
|
if (!mdio_bus)
|
|
return -EPROBE_DEFER;
|
|
|
|
ethernet = of_parse_phandle(np, "dsa,ethernet", 0);
|
|
if (!ethernet) {
|
|
ret = -EINVAL;
|
|
goto out_put_mdio;
|
|
}
|
|
|
|
ethernet_dev = of_find_net_device_by_node(ethernet);
|
|
if (!ethernet_dev) {
|
|
ret = -EPROBE_DEFER;
|
|
goto out_put_mdio;
|
|
}
|
|
|
|
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
|
|
if (!pd) {
|
|
ret = -ENOMEM;
|
|
goto out_put_ethernet;
|
|
}
|
|
|
|
dev->platform_data = pd;
|
|
pd->of_netdev = ethernet_dev;
|
|
pd->nr_chips = of_get_available_child_count(np);
|
|
if (pd->nr_chips > DSA_MAX_SWITCHES)
|
|
pd->nr_chips = DSA_MAX_SWITCHES;
|
|
|
|
pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data),
|
|
GFP_KERNEL);
|
|
if (!pd->chip) {
|
|
ret = -ENOMEM;
|
|
goto out_free;
|
|
}
|
|
|
|
chip_index = -1;
|
|
for_each_available_child_of_node(np, child) {
|
|
int i;
|
|
|
|
chip_index++;
|
|
cd = &pd->chip[chip_index];
|
|
|
|
cd->of_node = child;
|
|
|
|
/* Initialize the routing table */
|
|
for (i = 0; i < DSA_MAX_SWITCHES; ++i)
|
|
cd->rtable[i] = DSA_RTABLE_NONE;
|
|
|
|
/* When assigning the host device, increment its refcount */
|
|
cd->host_dev = get_device(&mdio_bus->dev);
|
|
|
|
sw_addr = of_get_property(child, "reg", NULL);
|
|
if (!sw_addr)
|
|
continue;
|
|
|
|
cd->sw_addr = be32_to_cpup(sw_addr);
|
|
if (cd->sw_addr >= PHY_MAX_ADDR)
|
|
continue;
|
|
|
|
if (!of_property_read_u32(child, "eeprom-length", &eeprom_len))
|
|
cd->eeprom_len = eeprom_len;
|
|
|
|
mdio = of_parse_phandle(child, "mii-bus", 0);
|
|
if (mdio) {
|
|
mdio_bus_switch = of_mdio_find_bus(mdio);
|
|
if (!mdio_bus_switch) {
|
|
ret = -EPROBE_DEFER;
|
|
goto out_free_chip;
|
|
}
|
|
|
|
/* Drop the mdio_bus device ref, replacing the host
|
|
* device with the mdio_bus_switch device, keeping
|
|
* the refcount from of_mdio_find_bus() above.
|
|
*/
|
|
put_device(cd->host_dev);
|
|
cd->host_dev = &mdio_bus_switch->dev;
|
|
}
|
|
|
|
for_each_available_child_of_node(child, port) {
|
|
port_reg = of_get_property(port, "reg", NULL);
|
|
if (!port_reg)
|
|
continue;
|
|
|
|
port_index = be32_to_cpup(port_reg);
|
|
if (port_index >= DSA_MAX_PORTS)
|
|
break;
|
|
|
|
port_name = of_get_property(port, "label", NULL);
|
|
if (!port_name)
|
|
continue;
|
|
|
|
cd->port_dn[port_index] = port;
|
|
|
|
cd->port_names[port_index] = kstrdup(port_name,
|
|
GFP_KERNEL);
|
|
if (!cd->port_names[port_index]) {
|
|
ret = -ENOMEM;
|
|
goto out_free_chip;
|
|
}
|
|
|
|
ret = dsa_of_probe_links(pd, cd, chip_index,
|
|
port_index, port, port_name);
|
|
if (ret)
|
|
goto out_free_chip;
|
|
|
|
}
|
|
}
|
|
|
|
/* The individual chips hold their own refcount on the mdio bus,
|
|
* so drop ours */
|
|
put_device(&mdio_bus->dev);
|
|
|
|
return 0;
|
|
|
|
out_free_chip:
|
|
dsa_of_free_platform_data(pd);
|
|
out_free:
|
|
kfree(pd);
|
|
dev->platform_data = NULL;
|
|
out_put_ethernet:
|
|
put_device(ðernet_dev->dev);
|
|
out_put_mdio:
|
|
put_device(&mdio_bus->dev);
|
|
return ret;
|
|
}
|
|
|
|
static void dsa_of_remove(struct device *dev)
|
|
{
|
|
struct dsa_platform_data *pd = dev->platform_data;
|
|
|
|
if (!dev->of_node)
|
|
return;
|
|
|
|
dsa_of_free_platform_data(pd);
|
|
put_device(&pd->of_netdev->dev);
|
|
kfree(pd);
|
|
}
|
|
#else
|
|
static inline int dsa_of_probe(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void dsa_of_remove(struct device *dev)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev,
|
|
struct device *parent, struct dsa_platform_data *pd)
|
|
{
|
|
int i;
|
|
unsigned configured = 0;
|
|
|
|
dst->pd = pd;
|
|
dst->master_netdev = dev;
|
|
dst->cpu_switch = -1;
|
|
dst->cpu_port = -1;
|
|
|
|
for (i = 0; i < pd->nr_chips; i++) {
|
|
struct dsa_switch *ds;
|
|
|
|
ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev);
|
|
if (IS_ERR(ds)) {
|
|
netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n",
|
|
i, PTR_ERR(ds));
|
|
continue;
|
|
}
|
|
|
|
dst->ds[i] = ds;
|
|
|
|
++configured;
|
|
}
|
|
|
|
/*
|
|
* If no switch was found, exit cleanly
|
|
*/
|
|
if (!configured)
|
|
return -EPROBE_DEFER;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dsa_probe(struct platform_device *pdev)
|
|
{
|
|
struct dsa_platform_data *pd = pdev->dev.platform_data;
|
|
struct net_device *dev;
|
|
struct dsa_switch_tree *dst;
|
|
int ret;
|
|
|
|
pr_notice_once("Distributed Switch Architecture driver version %s\n",
|
|
dsa_driver_version);
|
|
|
|
if (pdev->dev.of_node) {
|
|
ret = dsa_of_probe(&pdev->dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pd = pdev->dev.platform_data;
|
|
}
|
|
|
|
if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL))
|
|
return -EINVAL;
|
|
|
|
if (pd->of_netdev) {
|
|
dev = pd->of_netdev;
|
|
dev_hold(dev);
|
|
} else {
|
|
dev = dev_to_net_device(pd->netdev);
|
|
}
|
|
if (dev == NULL) {
|
|
ret = -EPROBE_DEFER;
|
|
goto out;
|
|
}
|
|
|
|
if (dev->dsa_ptr != NULL) {
|
|
dev_put(dev);
|
|
ret = -EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
|
|
if (dst == NULL) {
|
|
dev_put(dev);
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, dst);
|
|
|
|
ret = dsa_setup_dst(dst, dev, &pdev->dev, pd);
|
|
if (ret) {
|
|
dev_put(dev);
|
|
goto out;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out:
|
|
dsa_of_remove(&pdev->dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void dsa_remove_dst(struct dsa_switch_tree *dst)
|
|
{
|
|
int i;
|
|
|
|
dst->master_netdev->dsa_ptr = NULL;
|
|
|
|
/* If we used a tagging format that doesn't have an ethertype
|
|
* field, make sure that all packets from this point get sent
|
|
* without the tag and go through the regular receive path.
|
|
*/
|
|
wmb();
|
|
|
|
for (i = 0; i < dst->pd->nr_chips; i++) {
|
|
struct dsa_switch *ds = dst->ds[i];
|
|
|
|
if (ds)
|
|
dsa_switch_destroy(ds);
|
|
}
|
|
|
|
dsa_cpu_port_ethtool_restore(dst->ds[0]);
|
|
|
|
dev_put(dst->master_netdev);
|
|
}
|
|
|
|
static int dsa_remove(struct platform_device *pdev)
|
|
{
|
|
struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
|
|
|
|
dsa_remove_dst(dst);
|
|
dsa_of_remove(&pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dsa_shutdown(struct platform_device *pdev)
|
|
{
|
|
}
|
|
|
|
static int dsa_switch_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;
|
|
|
|
if (unlikely(dst == NULL)) {
|
|
kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
return dst->rcv(skb, dev, pt, orig_dev);
|
|
}
|
|
|
|
static struct packet_type dsa_pack_type __read_mostly = {
|
|
.type = cpu_to_be16(ETH_P_XDSA),
|
|
.func = dsa_switch_rcv,
|
|
};
|
|
|
|
static struct notifier_block dsa_netdevice_nb __read_mostly = {
|
|
.notifier_call = dsa_slave_netdevice_event,
|
|
};
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int dsa_suspend(struct device *d)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(d);
|
|
struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
|
|
int i, ret = 0;
|
|
|
|
for (i = 0; i < dst->pd->nr_chips; i++) {
|
|
struct dsa_switch *ds = dst->ds[i];
|
|
|
|
if (ds != NULL)
|
|
ret = dsa_switch_suspend(ds);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dsa_resume(struct device *d)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(d);
|
|
struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
|
|
int i, ret = 0;
|
|
|
|
for (i = 0; i < dst->pd->nr_chips; i++) {
|
|
struct dsa_switch *ds = dst->ds[i];
|
|
|
|
if (ds != NULL)
|
|
ret = dsa_switch_resume(ds);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
|
|
|
|
static const struct of_device_id dsa_of_match_table[] = {
|
|
{ .compatible = "marvell,dsa", },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, dsa_of_match_table);
|
|
|
|
static struct platform_driver dsa_driver = {
|
|
.probe = dsa_probe,
|
|
.remove = dsa_remove,
|
|
.shutdown = dsa_shutdown,
|
|
.driver = {
|
|
.name = "dsa",
|
|
.of_match_table = dsa_of_match_table,
|
|
.pm = &dsa_pm_ops,
|
|
},
|
|
};
|
|
|
|
static int __init dsa_init_module(void)
|
|
{
|
|
int rc;
|
|
|
|
register_netdevice_notifier(&dsa_netdevice_nb);
|
|
|
|
rc = platform_driver_register(&dsa_driver);
|
|
if (rc)
|
|
return rc;
|
|
|
|
dev_add_pack(&dsa_pack_type);
|
|
|
|
return 0;
|
|
}
|
|
module_init(dsa_init_module);
|
|
|
|
static void __exit dsa_cleanup_module(void)
|
|
{
|
|
unregister_netdevice_notifier(&dsa_netdevice_nb);
|
|
dev_remove_pack(&dsa_pack_type);
|
|
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");
|