Release 4.11 net/dsa/dsa.c
/*
* net/dsa/dsa.c - Hardware switch handling
* Copyright (c) 2008-2009 Marvell Semiconductor
* Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/device.h>
#include <linux/list.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <net/dsa.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/of_platform.h>
#include <linux/of_net.h>
#include <linux/of_gpio.h>
#include <linux/sysfs.h>
#include <linux/phy_fixed.h>
#include <linux/gpio/consumer.h>
#include "dsa_priv.h"
static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
struct net_device *dev)
{
/* Just return the original SKB */
return skb;
}
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static const struct dsa_device_ops none_ops = {
.xmit = dsa_slave_notag_xmit,
.rcv = NULL,
};
const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = {
#ifdef CONFIG_NET_DSA_TAG_DSA
[DSA_TAG_PROTO_DSA] = &dsa_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_EDSA
[DSA_TAG_PROTO_EDSA] = &edsa_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_TRAILER
[DSA_TAG_PROTO_TRAILER] = &trailer_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_BRCM
[DSA_TAG_PROTO_BRCM] = &brcm_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_QCA
[DSA_TAG_PROTO_QCA] = &qca_netdev_ops,
#endif
[DSA_TAG_PROTO_NONE] = &none_ops,
};
/* switch driver registration ***********************************************/
static DEFINE_MUTEX(dsa_switch_drivers_mutex);
static LIST_HEAD(dsa_switch_drivers);
void register_switch_driver(struct dsa_switch_driver *drv)
{
mutex_lock(&dsa_switch_drivers_mutex);
list_add_tail(&drv->list, &dsa_switch_drivers);
mutex_unlock(&dsa_switch_drivers_mutex);
}
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EXPORT_SYMBOL_GPL(register_switch_driver);
void unregister_switch_driver(struct dsa_switch_driver *drv)
{
mutex_lock(&dsa_switch_drivers_mutex);
list_del_init(&drv->list);
mutex_unlock(&dsa_switch_drivers_mutex);
}
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EXPORT_SYMBOL_GPL(unregister_switch_driver);
static const struct dsa_switch_ops *
dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr,
const char **_name, void **priv)
{
const struct dsa_switch_ops *ret;
struct list_head *list;
const char *name;
ret = NULL;
name = NULL;
mutex_lock(&dsa_switch_drivers_mutex);
list_for_each(list, &dsa_switch_drivers) {
const struct dsa_switch_ops *ops;
struct dsa_switch_driver *drv;
drv = list_entry(list, struct dsa_switch_driver, list);
ops = drv->ops;
name = ops->probe(parent, host_dev, sw_addr, priv);
if (name != NULL) {
ret = ops;
break;
}
}
mutex_unlock(&dsa_switch_drivers_mutex);
*_name = name;
return ret;
}
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Alexander Duyck | 2 | 1.41% | 1 | 10.00% |
Total | 142 | 100.00% | 10 | 100.00% |
/* basic switch operations **************************************************/
int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
struct dsa_port *dport, int port)
{
struct device_node *port_dn = dport->dn;
struct phy_device *phydev;
int ret, mode;
if (of_phy_is_fixed_link(port_dn)) {
ret = of_phy_register_fixed_link(port_dn);
if (ret) {
dev_err(dev, "failed to register fixed PHY\n");
return ret;
}
phydev = of_phy_find_device(port_dn);
mode = of_get_phy_mode(port_dn);
if (mode < 0)
mode = PHY_INTERFACE_MODE_NA;
phydev->interface = mode;
genphy_config_init(phydev);
genphy_read_status(phydev);
if (ds->ops->adjust_link)
ds->ops->adjust_link(ds, port, phydev);
put_device(&phydev->mdio.dev);
}
return 0;
}
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Vivien Didelot | 2 | 1.35% | 1 | 16.67% |
Total | 148 | 100.00% | 6 | 100.00% |
static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev)
{
struct dsa_port *dport;
int ret, port;
for (port = 0; port < ds->num_ports; port++) {
if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
continue;
dport = &ds->ports[port];
ret = dsa_cpu_dsa_setup(ds, dev, dport, port);
if (ret)
return ret;
}
return 0;
}
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Total | 96 | 100.00% | 4 | 100.00% |
const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol)
{
const struct dsa_device_ops *ops;
if (tag_protocol >= DSA_TAG_LAST)
return ERR_PTR(-EINVAL);
ops = dsa_device_ops[tag_protocol];
if (!ops)
return ERR_PTR(-ENOPROTOOPT);
return ops;
}
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int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds)
{
struct net_device *master;
struct ethtool_ops *cpu_ops;
master = ds->dst->master_netdev;
if (ds->master_netdev)
master = ds->master_netdev;
cpu_ops = devm_kzalloc(ds->dev, sizeof(*cpu_ops), GFP_KERNEL);
if (!cpu_ops)
return -ENOMEM;
memcpy(&ds->dst->master_ethtool_ops, master->ethtool_ops,
sizeof(struct ethtool_ops));
ds->dst->master_orig_ethtool_ops = master->ethtool_ops;
memcpy(cpu_ops, &ds->dst->master_ethtool_ops,
sizeof(struct ethtool_ops));
dsa_cpu_port_ethtool_init(cpu_ops);
master->ethtool_ops = cpu_ops;
return 0;
}
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void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds)
{
struct net_device *master;
master = ds->dst->master_netdev;
if (ds->master_netdev)
master = ds->master_netdev;
master->ethtool_ops = ds->dst->master_orig_ethtool_ops;
}
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static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
{
const struct dsa_switch_ops *ops = ds->ops;
struct dsa_switch_tree *dst = ds->dst;
struct dsa_chip_data *cd = ds->cd;
bool valid_name_found = false;
int index = ds->index;
int i, ret;
/*
* Validate supplied switch configuration.
*/
for (i = 0; i < ds->num_ports; i++) {
char *name;
name = cd->port_names[i];
if (name == NULL)
continue;
if (!strcmp(name, "cpu")) {
if (dst->cpu_switch) {
netdev_err(dst->master_netdev,
"multiple cpu ports?!\n");
return -EINVAL;
}
dst->cpu_switch = ds;
dst->cpu_port = i;
ds->cpu_port_mask |= 1 << i;
} else if (!strcmp(name, "dsa")) {
ds->dsa_port_mask |= 1 << i;
} else {
ds->enabled_port_mask |= 1 << i;
}
valid_name_found = true;
}
if (!valid_name_found && i == ds->num_ports)
return -EINVAL;
/* Make the built-in MII bus mask match the number of ports,
* switch drivers can override this later
*/
ds->phys_mii_mask = ds->enabled_port_mask;
/*
* If the CPU connects to this switch, set the switch tree
* tagging protocol to the preferred tagging format of this
* switch.
*/
if (dst->cpu_switch == ds) {
enum dsa_tag_protocol tag_protocol;
tag_protocol = ops->get_tag_protocol(ds);
dst->tag_ops = dsa_resolve_tag_protocol(tag_protocol);
if (IS_ERR(dst->tag_ops))
return PTR_ERR(dst->tag_ops);
dst->rcv = dst->tag_ops->rcv;
}
memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable));
/*
* Do basic register setup.
*/
ret = ops->setup(ds);
if (ret < 0)
return ret;
ret = dsa_switch_register_notifier(ds);
if (ret)
return ret;
if (ops->set_addr) {
ret = ops->set_addr(ds, dst->master_netdev->dev_addr);
if (ret < 0)
return ret;
}
if (!ds->slave_mii_bus && ops->phy_read) {
ds->slave_mii_bus = devm_mdiobus_alloc(parent);
if (!ds->slave_mii_bus)
return -ENOMEM;
dsa_slave_mii_bus_init(ds);
ret = mdiobus_register(ds->slave_mii_bus);
if (ret < 0)
return ret;
}
/*
* Create network devices for physical switch ports.
*/
for (i = 0; i < ds->num_ports; i++) {
ds->ports[i].dn = cd->port_dn[i];
if (!(ds->enabled_port_mask & (1 << i)))
continue;
ret = dsa_slave_create(ds, parent, i, cd->port_names[i]);
if (ret < 0)
netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s): %d\n",
index, i, cd->port_names[i], ret);
}
/* Perform configuration of the CPU and DSA ports */
ret = dsa_cpu_dsa_setups(ds, parent);
if (ret < 0)
netdev_err(dst->master_netdev, "[%d] : can't configure CPU and DSA ports\n",
index);
ret = dsa_cpu_port_ethtool_setup(ds);
if (ret)
return ret;
return 0;
}
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Vivien Didelot | 50 | 9.07% | 5 | 17.86% |
Alexander Duyck | 10 | 1.81% | 1 | 3.57% |
John Crispin | 8 | 1.45% | 1 | 3.57% |
Joe Perches | 7 | 1.27% | 1 | 3.57% |
Guenter Roeck | 5 | 0.91% | 1 | 3.57% |
Neil Armstrong | 4 | 0.73% | 1 | 3.57% |
Russell King | 3 | 0.54% | 1 | 3.57% |
Total | 551 | 100.00% | 28 | 100.00% |
static struct dsa_switch *
dsa_switch_setup(struct dsa_switch_tree *dst, int index,
struct device *parent, struct device *host_dev)
{
struct dsa_chip_data *cd = dst->pd->chip + index;
const struct dsa_switch_ops *ops;
struct dsa_switch *ds;
int ret;
const char *name;
void *priv;
/*
* Probe for switch model.
*/
ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv);
if (!ops) {
netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n",
index);
return ERR_PTR(-EINVAL);
}
netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n",
index, name);
/*
* Allocate and initialise switch state.
*/
ds = dsa_switch_alloc(parent, DSA_MAX_PORTS);
if (!ds)
return ERR_PTR(-ENOMEM);
ds->dst = dst;
ds->index = index;
ds->cd = cd;
ds->ops = ops;
ds->priv = priv;
ret = dsa_switch_setup_one(ds, parent);
if (ret)
return ERR_PTR(ret);
return ds;
}
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Florian Fainelli | 158 | 81.44% | 3 | 27.27% |
Andrew Lunn | 17 | 8.76% | 3 | 27.27% |
Vivien Didelot | 11 | 5.67% | 3 | 27.27% |
Lennert Buytenhek | 6 | 3.09% | 1 | 9.09% |
Neil Armstrong | 2 | 1.03% | 1 | 9.09% |
Total | 194 | 100.00% | 11 | 100.00% |
void dsa_cpu_dsa_destroy(struct dsa_port *port)
{
struct device_node *port_dn = port->dn;
if (of_phy_is_fixed_link(port_dn))
of_phy_deregister_fixed_link(port_dn);
}
Contributors
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Andrew Lunn | 15 | 48.39% | 1 | 20.00% |
Florian Fainelli | 11 | 35.48% | 1 | 20.00% |
Lennert Buytenhek | 3 | 9.68% | 1 | 20.00% |
Neil Armstrong | 1 | 3.23% | 1 | 20.00% |
Johan Hovold | 1 | 3.23% | 1 | 20.00% |
Total | 31 | 100.00% | 5 | 100.00% |
static void dsa_switch_destroy(struct dsa_switch *ds)
{
int port;
/* Destroy network devices for physical switch ports. */
for (port = 0; port < ds->num_ports; port++) {
if (!(ds->enabled_port_mask & (1 << port)))
continue;
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 < ds->num_ports; port++) {
if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
continue;
dsa_cpu_dsa_destroy(&ds->ports[port]);
/* 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->ops->phy_read)
mdiobus_unregister(ds->slave_mii_bus);
dsa_switch_unregister_notifier(ds);
}
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Andrew Lunn | 121 | 71.60% | 6 | 46.15% |
Neil Armstrong | 34 | 20.12% | 2 | 15.38% |
Vivien Didelot | 12 | 7.10% | 3 | 23.08% |
Florian Fainelli | 1 | 0.59% | 1 | 7.69% |
Guenter Roeck | 1 | 0.59% | 1 | 7.69% |
Total | 169 | 100.00% | 13 | 100.00% |
#ifdef CONFIG_PM_SLEEP
int dsa_switch_suspend(struct dsa_switch *ds)
{
int i, ret = 0;
/* Suspend slave network devices */
for (i = 0; i < ds->num_ports; i++) {
if (!dsa_is_port_initialized(ds, i))
continue;
ret = dsa_slave_suspend(ds->ports[i].netdev);
if (ret)
return ret;
}
if (ds->ops->suspend)
ret = ds->ops->suspend(ds);
return ret;
}
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Florian Fainelli | 78 | 87.64% | 1 | 20.00% |
Vivien Didelot | 5 | 5.62% | 2 | 40.00% |
Guenter Roeck | 4 | 4.49% | 1 | 20.00% |
Andrew Lunn | 2 | 2.25% | 1 | 20.00% |
Total | 89 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL_GPL(dsa_switch_suspend);
int dsa_switch_resume(struct dsa_switch *ds)
{
int i, ret = 0;
if (ds->ops->resume)
ret = ds->ops->resume(ds);
if (ret)
return ret;
/* Resume slave network devices */
for (i = 0; i < ds->num_ports; i++) {
if (!dsa_is_port_initialized(ds, i))
continue;
ret = dsa_slave_resume(ds->ports[i].netdev);
if (ret)
return ret;
}
return 0;
}
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Florian Fainelli | 85 | 88.54% | 1 | 20.00% |
Vivien Didelot | 5 | 5.21% | 2 | 40.00% |
Guenter Roeck | 4 | 4.17% | 1 | 20.00% |
Andrew Lunn | 2 | 2.08% | 1 | 20.00% |
Total | 96 | 100.00% | 5 | 100.00% |
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;
}
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Total | 41 | 100.00% | 1 | 100.00% |
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);
}
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Total | 46 | 100.00% | 1 | 100.00% |
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;
}
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Lennert Buytenhek | 56 | 98.25% | 1 | 50.00% |
Alexander Duyck | 1 | 1.75% | 1 | 50.00% |
Total | 57 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
struct net_device *dsa_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;
}
Contributors
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Lennert Buytenhek | 61 | 98.39% | 1 | 50.00% |
Florian Fainelli | 1 | 1.61% | 1 | 50.00% |
Total | 62 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(dsa_dev_to_net_device);
#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;
}
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Florian Fainelli | 79 | 62.70% | 1 | 25.00% |
Lennert Buytenhek | 42 | 33.33% | 2 | 50.00% |
Pavel Nakonechny | 5 | 3.97% | 1 | 25.00% |
Total | 126 | 100.00% | 4 | 100.00% |
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;
}
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Andrew Lunn | 115 | 100.00% | 1 | 100.00% |
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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);
}
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Russell King | 24 | 25.26% | 1 | 33.33% |
Total | 95 | 100.00% | 3 | 100.00% |
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(