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Release 4.11 net/dsa/dsa.c

Directory: net/dsa
/*
 * 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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Andrew Lunn22100.00%1100.00%
Total22100.00%1100.00%

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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Lennert Buytenhek3090.91%150.00%
Florian Fainelli39.09%150.00%
Total33100.00%2100.00%

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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Lennert Buytenhek2790.00%150.00%
Florian Fainelli310.00%150.00%
Total30100.00%2100.00%

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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Vivien Didelot7452.11%330.00%
Lennert Buytenhek3625.35%110.00%
Florian Fainelli1611.27%220.00%
Andrew Lunn107.04%220.00%
Guenter Roeck42.82%110.00%
Alexander Duyck21.41%110.00%
Total142100.00%10100.00%

/* 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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Andrew Lunn12584.46%350.00%
Florian Fainelli117.43%116.67%
Johan Hovold106.76%116.67%
Vivien Didelot21.35%116.67%
Total148100.00%6100.00%


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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PersonTokensPropCommitsCommitProp
Andrew Lunn8891.67%250.00%
Florian Fainelli55.21%125.00%
Vivien Didelot33.12%125.00%
Total96100.00%4100.00%


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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Andrew Lunn52100.00%1100.00%
Total52100.00%1100.00%


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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Florian Fainelli128100.00%1100.00%
Total128100.00%1100.00%


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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Florian Fainelli45100.00%1100.00%
Total45100.00%1100.00%


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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Lennert Buytenhek27349.55%27.14%
Andrew Lunn12522.69%1035.71%
Florian Fainelli6611.98%517.86%
Vivien Didelot509.07%517.86%
Alexander Duyck101.81%13.57%
John Crispin81.45%13.57%
Joe Perches71.27%13.57%
Guenter Roeck50.91%13.57%
Neil Armstrong40.73%13.57%
Russell King30.54%13.57%
Total551100.00%28100.00%


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 Fainelli15881.44%327.27%
Andrew Lunn178.76%327.27%
Vivien Didelot115.67%327.27%
Lennert Buytenhek63.09%19.09%
Neil Armstrong21.03%19.09%
Total194100.00%11100.00%


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); }

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PersonTokensPropCommitsCommitProp
Andrew Lunn1548.39%120.00%
Florian Fainelli1135.48%120.00%
Lennert Buytenhek39.68%120.00%
Neil Armstrong13.23%120.00%
Johan Hovold13.23%120.00%
Total31100.00%5100.00%


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 Lunn12171.60%646.15%
Neil Armstrong3420.12%215.38%
Vivien Didelot127.10%323.08%
Florian Fainelli10.59%17.69%
Guenter Roeck10.59%17.69%
Total169100.00%13100.00%

#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 Fainelli7887.64%120.00%
Vivien Didelot55.62%240.00%
Guenter Roeck44.49%120.00%
Andrew Lunn22.25%120.00%
Total89100.00%5100.00%

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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PersonTokensPropCommitsCommitProp
Florian Fainelli8588.54%120.00%
Vivien Didelot55.21%240.00%
Guenter Roeck44.17%120.00%
Andrew Lunn22.08%120.00%
Total96100.00%5100.00%

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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Lennert Buytenhek41100.00%1100.00%
Total41100.00%1100.00%


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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Lennert Buytenhek46100.00%1100.00%
Total46100.00%1100.00%


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 Buytenhek5698.25%150.00%
Alexander Duyck11.75%150.00%
Total57100.00%2100.00%

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; }

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PersonTokensPropCommitsCommitProp
Lennert Buytenhek6198.39%150.00%
Florian Fainelli11.61%150.00%
Total62100.00%2100.00%

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 Fainelli7962.70%125.00%
Lennert Buytenhek4233.33%250.00%
Pavel Nakonechny53.97%125.00%
Total126100.00%4100.00%


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 Lunn115100.00%1100.00%
Total115100.00%1100.00%


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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Florian Fainelli7174.74%266.67%
Russell King2425.26%133.33%
Total95100.00%3100.00%


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(