forked from Minki/linux
5bcbe0f35f
The fixed phys delete function simply removed the fixed phy from the internal linked list and freed the memory. It however did not unregister the associated phy device. This meant it was still possible to find the phy device on the mdio bus. Make fixed_phy_del() an internal function and add a fixed_phy_unregister() to unregisters the phy device and then uses fixed_phy_del() to free resources. Modify DSA to use this new API function, so we don't leak phys. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
1069 lines
23 KiB
C
1069 lines
23 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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/* 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 *host_dev, int sw_addr, char **_name)
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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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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(host_dev, sw_addr);
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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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static int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct net_device *master)
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{
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struct dsa_chip_data *cd = ds->pd;
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struct device_node *port_dn;
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struct phy_device *phydev;
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int ret, port, mode;
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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 = cd->port_dn[port];
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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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netdev_err(master,
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"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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}
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return 0;
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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 *pd = ds->pd;
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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 = pd->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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} 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->phys_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->phys_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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switch (ds->tag_protocol) {
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#ifdef CONFIG_NET_DSA_TAG_DSA
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case DSA_TAG_PROTO_DSA:
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dst->rcv = dsa_netdev_ops.rcv;
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break;
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#endif
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#ifdef CONFIG_NET_DSA_TAG_EDSA
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case DSA_TAG_PROTO_EDSA:
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dst->rcv = edsa_netdev_ops.rcv;
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break;
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#endif
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#ifdef CONFIG_NET_DSA_TAG_TRAILER
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case DSA_TAG_PROTO_TRAILER:
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dst->rcv = trailer_netdev_ops.rcv;
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break;
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#endif
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#ifdef CONFIG_NET_DSA_TAG_BRCM
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case DSA_TAG_PROTO_BRCM:
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dst->rcv = brcm_netdev_ops.rcv;
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break;
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#endif
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case DSA_TAG_PROTO_NONE:
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break;
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default:
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ret = -ENOPROTOOPT;
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goto out;
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}
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dst->tag_protocol = ds->tag_protocol;
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}
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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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ds->slave_mii_bus = devm_mdiobus_alloc(parent);
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if (ds->slave_mii_bus == NULL) {
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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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* 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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if (!(ds->phys_port_mask & (1 << i)))
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continue;
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ret = dsa_slave_create(ds, parent, i, pd->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, pd->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_setup(ds, dst->master_netdev);
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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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#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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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 *pd = 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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char *name;
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/*
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* Probe for switch model.
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*/
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drv = dsa_switch_probe(host_dev, pd->sw_addr, &name);
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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) + drv->priv_size, 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->pd = pd;
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ds->drv = drv;
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ds->tag_protocol = drv->tag_protocol;
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ds->master_dev = host_dev;
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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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static void dsa_switch_destroy(struct dsa_switch *ds)
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{
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struct device_node *port_dn;
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struct phy_device *phydev;
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struct dsa_chip_data *cd = ds->pd;
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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->phys_port_mask & (1 << port)))
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continue;
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|
|
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if (!ds->ports[port])
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continue;
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dsa_slave_destroy(ds->ports[port]);
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}
|
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|
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/* Remove any fixed link PHYs */
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for (port = 0; port < DSA_MAX_PORTS; port++) {
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port_dn = cd->port_dn[port];
|
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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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of_node_put(port_dn);
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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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mdiobus_unregister(ds->slave_mii_bus);
|
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}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
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static int dsa_switch_suspend(struct dsa_switch *ds)
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|
{
|
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int i, ret = 0;
|
|
|
|
/* Suspend slave network devices */
|
|
for (i = 0; i < DSA_MAX_PORTS; i++) {
|
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if (!dsa_is_port_initialized(ds, i))
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continue;
|
|
|
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ret = dsa_slave_suspend(ds->ports[i]);
|
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if (ret)
|
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return ret;
|
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}
|
|
|
|
if (ds->drv->suspend)
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ret = ds->drv->suspend(ds);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int dsa_switch_resume(struct dsa_switch *ds)
|
|
{
|
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int i, ret = 0;
|
|
|
|
if (ds->drv->resume)
|
|
ret = ds->drv->resume(ds);
|
|
|
|
if (ret)
|
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return ret;
|
|
|
|
/* Resume slave network devices */
|
|
for (i = 0; i < DSA_MAX_PORTS; i++) {
|
|
if (!dsa_is_port_initialized(ds, i))
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continue;
|
|
|
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ret = dsa_slave_resume(ds->ports[i]);
|
|
if (ret)
|
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return ret;
|
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}
|
|
|
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return 0;
|
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}
|
|
#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;
|
|
|
|
/* First time routing table allocation */
|
|
if (!cd->rtable) {
|
|
cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8),
|
|
GFP_KERNEL);
|
|
if (!cd->rtable)
|
|
return -ENOMEM;
|
|
|
|
/* default to no valid uplink/downlink */
|
|
memset(cd->rtable, -1, pd->nr_chips * sizeof(s8));
|
|
}
|
|
|
|
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++;
|
|
}
|
|
kfree(pd->chip[i].rtable);
|
|
|
|
/* 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;
|
|
int gpio;
|
|
enum of_gpio_flags of_flags;
|
|
unsigned long flags;
|
|
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) {
|
|
chip_index++;
|
|
cd = &pd->chip[chip_index];
|
|
|
|
cd->of_node = child;
|
|
|
|
/* 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;
|
|
}
|
|
gpio = of_get_named_gpio_flags(child, "reset-gpios", 0,
|
|
&of_flags);
|
|
if (gpio_is_valid(gpio)) {
|
|
flags = (of_flags == OF_GPIO_ACTIVE_LOW ?
|
|
GPIOF_ACTIVE_LOW : 0);
|
|
ret = devm_gpio_request_one(dev, gpio, flags,
|
|
"switch_reset");
|
|
if (ret)
|
|
goto out_free_chip;
|
|
|
|
cd->reset = gpio_to_desc(gpio);
|
|
gpiod_direction_output(cd->reset, 0);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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 = "brcm,bcm7445-switch-v4.0" },
|
|
{ .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");
|