421 lines
9.8 KiB
C
421 lines
9.8 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Distributed Switch Architecture loopback driver
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*
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* Copyright (C) 2016, Florian Fainelli <f.fainelli@gmail.com>
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*/
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#include <linux/platform_device.h>
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#include <linux/netdevice.h>
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#include <linux/phy.h>
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#include <linux/phy_fixed.h>
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#include <linux/export.h>
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#include <linux/ethtool.h>
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#include <linux/workqueue.h>
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#include <linux/module.h>
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#include <linux/if_bridge.h>
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#include <linux/dsa/loop.h>
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#include <net/dsa.h>
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#include "dsa_loop.h"
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static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
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[DSA_LOOP_PHY_READ_OK] = { "phy_read_ok", },
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[DSA_LOOP_PHY_READ_ERR] = { "phy_read_err", },
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[DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
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[DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
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};
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static struct phy_device *phydevs[PHY_MAX_ADDR];
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enum dsa_loop_devlink_resource_id {
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DSA_LOOP_DEVLINK_PARAM_ID_VTU,
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};
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static u64 dsa_loop_devlink_vtu_get(void *priv)
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{
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struct dsa_loop_priv *ps = priv;
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unsigned int i, count = 0;
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struct dsa_loop_vlan *vl;
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for (i = 0; i < ARRAY_SIZE(ps->vlans); i++) {
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vl = &ps->vlans[i];
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if (vl->members)
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count++;
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}
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return count;
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}
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static int dsa_loop_setup_devlink_resources(struct dsa_switch *ds)
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{
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struct devlink_resource_size_params size_params;
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struct dsa_loop_priv *ps = ds->priv;
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int err;
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devlink_resource_size_params_init(&size_params, ARRAY_SIZE(ps->vlans),
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ARRAY_SIZE(ps->vlans),
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1, DEVLINK_RESOURCE_UNIT_ENTRY);
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err = dsa_devlink_resource_register(ds, "VTU", ARRAY_SIZE(ps->vlans),
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DSA_LOOP_DEVLINK_PARAM_ID_VTU,
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DEVLINK_RESOURCE_ID_PARENT_TOP,
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&size_params);
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if (err)
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goto out;
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dsa_devlink_resource_occ_get_register(ds,
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DSA_LOOP_DEVLINK_PARAM_ID_VTU,
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dsa_loop_devlink_vtu_get, ps);
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return 0;
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out:
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dsa_devlink_resources_unregister(ds);
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return err;
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}
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static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds,
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int port,
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enum dsa_tag_protocol mp)
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{
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dev_dbg(ds->dev, "%s: port: %d\n", __func__, port);
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return DSA_TAG_PROTO_NONE;
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}
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static int dsa_loop_setup(struct dsa_switch *ds)
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{
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struct dsa_loop_priv *ps = ds->priv;
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unsigned int i;
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for (i = 0; i < ds->num_ports; i++)
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memcpy(ps->ports[i].mib, dsa_loop_mibs,
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sizeof(dsa_loop_mibs));
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dev_dbg(ds->dev, "%s\n", __func__);
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return dsa_loop_setup_devlink_resources(ds);
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}
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static void dsa_loop_teardown(struct dsa_switch *ds)
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{
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dsa_devlink_resources_unregister(ds);
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}
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static int dsa_loop_get_sset_count(struct dsa_switch *ds, int port, int sset)
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{
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if (sset != ETH_SS_STATS && sset != ETH_SS_PHY_STATS)
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return 0;
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return __DSA_LOOP_CNT_MAX;
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}
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static void dsa_loop_get_strings(struct dsa_switch *ds, int port,
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u32 stringset, uint8_t *data)
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{
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struct dsa_loop_priv *ps = ds->priv;
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unsigned int i;
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if (stringset != ETH_SS_STATS && stringset != ETH_SS_PHY_STATS)
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return;
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for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
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memcpy(data + i * ETH_GSTRING_LEN,
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ps->ports[port].mib[i].name, ETH_GSTRING_LEN);
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}
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static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
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uint64_t *data)
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{
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struct dsa_loop_priv *ps = ds->priv;
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unsigned int i;
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for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
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data[i] = ps->ports[port].mib[i].val;
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}
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static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)
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{
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struct dsa_loop_priv *ps = ds->priv;
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struct mii_bus *bus = ps->bus;
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int ret;
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ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
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if (ret < 0)
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ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
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else
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ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;
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return ret;
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}
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static int dsa_loop_phy_write(struct dsa_switch *ds, int port,
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int regnum, u16 value)
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{
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struct dsa_loop_priv *ps = ds->priv;
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struct mii_bus *bus = ps->bus;
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int ret;
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ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
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if (ret < 0)
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ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
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else
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ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;
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return ret;
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}
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static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port,
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struct dsa_bridge bridge,
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bool *tx_fwd_offload,
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struct netlink_ext_ack *extack)
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{
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dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
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__func__, port, bridge.dev->name);
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return 0;
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}
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static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
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struct dsa_bridge bridge)
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{
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dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
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__func__, port, bridge.dev->name);
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}
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static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port,
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u8 state)
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{
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dev_dbg(ds->dev, "%s: port: %d, state: %d\n",
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__func__, port, state);
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}
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static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port,
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bool vlan_filtering,
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struct netlink_ext_ack *extack)
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{
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dev_dbg(ds->dev, "%s: port: %d, vlan_filtering: %d\n",
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__func__, port, vlan_filtering);
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return 0;
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}
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static int dsa_loop_port_vlan_add(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_vlan *vlan,
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struct netlink_ext_ack *extack)
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{
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bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
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bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
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struct dsa_loop_priv *ps = ds->priv;
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struct mii_bus *bus = ps->bus;
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struct dsa_loop_vlan *vl;
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if (vlan->vid >= ARRAY_SIZE(ps->vlans))
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return -ERANGE;
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/* Just do a sleeping operation to make lockdep checks effective */
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mdiobus_read(bus, ps->port_base + port, MII_BMSR);
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vl = &ps->vlans[vlan->vid];
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vl->members |= BIT(port);
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if (untagged)
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vl->untagged |= BIT(port);
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else
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vl->untagged &= ~BIT(port);
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dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
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__func__, port, vlan->vid, untagged ? "un" : "", pvid);
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if (pvid)
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ps->ports[port].pvid = vlan->vid;
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return 0;
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}
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static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port,
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const struct switchdev_obj_port_vlan *vlan)
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{
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bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
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struct dsa_loop_priv *ps = ds->priv;
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u16 pvid = ps->ports[port].pvid;
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struct mii_bus *bus = ps->bus;
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struct dsa_loop_vlan *vl;
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/* Just do a sleeping operation to make lockdep checks effective */
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mdiobus_read(bus, ps->port_base + port, MII_BMSR);
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vl = &ps->vlans[vlan->vid];
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vl->members &= ~BIT(port);
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if (untagged)
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vl->untagged &= ~BIT(port);
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if (pvid == vlan->vid)
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pvid = 1;
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dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
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__func__, port, vlan->vid, untagged ? "un" : "", pvid);
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ps->ports[port].pvid = pvid;
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return 0;
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}
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static int dsa_loop_port_change_mtu(struct dsa_switch *ds, int port,
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int new_mtu)
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{
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struct dsa_loop_priv *priv = ds->priv;
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priv->ports[port].mtu = new_mtu;
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return 0;
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}
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static int dsa_loop_port_max_mtu(struct dsa_switch *ds, int port)
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{
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return ETH_MAX_MTU;
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}
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static const struct dsa_switch_ops dsa_loop_driver = {
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.get_tag_protocol = dsa_loop_get_protocol,
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.setup = dsa_loop_setup,
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.teardown = dsa_loop_teardown,
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.get_strings = dsa_loop_get_strings,
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.get_ethtool_stats = dsa_loop_get_ethtool_stats,
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.get_sset_count = dsa_loop_get_sset_count,
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.get_ethtool_phy_stats = dsa_loop_get_ethtool_stats,
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.phy_read = dsa_loop_phy_read,
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.phy_write = dsa_loop_phy_write,
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.port_bridge_join = dsa_loop_port_bridge_join,
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.port_bridge_leave = dsa_loop_port_bridge_leave,
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.port_stp_state_set = dsa_loop_port_stp_state_set,
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.port_vlan_filtering = dsa_loop_port_vlan_filtering,
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.port_vlan_add = dsa_loop_port_vlan_add,
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.port_vlan_del = dsa_loop_port_vlan_del,
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.port_change_mtu = dsa_loop_port_change_mtu,
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.port_max_mtu = dsa_loop_port_max_mtu,
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};
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static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
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{
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struct dsa_loop_pdata *pdata = mdiodev->dev.platform_data;
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struct dsa_loop_priv *ps;
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struct dsa_switch *ds;
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int ret;
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if (!pdata)
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return -ENODEV;
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ds = devm_kzalloc(&mdiodev->dev, sizeof(*ds), GFP_KERNEL);
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if (!ds)
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return -ENOMEM;
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ds->dev = &mdiodev->dev;
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ds->num_ports = DSA_LOOP_NUM_PORTS;
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ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
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if (!ps)
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return -ENOMEM;
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ps->netdev = dev_get_by_name(&init_net, pdata->netdev);
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if (!ps->netdev)
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return -EPROBE_DEFER;
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pdata->cd.netdev[DSA_LOOP_CPU_PORT] = &ps->netdev->dev;
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ds->dev = &mdiodev->dev;
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ds->ops = &dsa_loop_driver;
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ds->priv = ps;
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ps->bus = mdiodev->bus;
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dev_set_drvdata(&mdiodev->dev, ds);
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ret = dsa_register_switch(ds);
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if (!ret)
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dev_info(&mdiodev->dev, "%s: 0x%0x\n",
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pdata->name, pdata->enabled_ports);
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return ret;
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}
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static void dsa_loop_drv_remove(struct mdio_device *mdiodev)
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{
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struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
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struct dsa_loop_priv *ps;
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if (!ds)
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return;
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ps = ds->priv;
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dsa_unregister_switch(ds);
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dev_put(ps->netdev);
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}
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static void dsa_loop_drv_shutdown(struct mdio_device *mdiodev)
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{
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struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
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if (!ds)
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|
return;
|
||
|
|
|
||
|
|
dsa_switch_shutdown(ds);
|
||
|
|
|
||
|
|
dev_set_drvdata(&mdiodev->dev, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct mdio_driver dsa_loop_drv = {
|
||
|
|
.mdiodrv.driver = {
|
||
|
|
.name = "dsa-loop",
|
||
|
|
},
|
||
|
|
.probe = dsa_loop_drv_probe,
|
||
|
|
.remove = dsa_loop_drv_remove,
|
||
|
|
.shutdown = dsa_loop_drv_shutdown,
|
||
|
|
};
|
||
|
|
|
||
|
|
#define NUM_FIXED_PHYS (DSA_LOOP_NUM_PORTS - 2)
|
||
|
|
|
||
|
|
static void dsa_loop_phydevs_unregister(void)
|
||
|
|
{
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
for (i = 0; i < NUM_FIXED_PHYS; i++)
|
||
|
|
if (!IS_ERR(phydevs[i])) {
|
||
|
|
fixed_phy_unregister(phydevs[i]);
|
||
|
|
phy_device_free(phydevs[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init dsa_loop_init(void)
|
||
|
|
{
|
||
|
|
struct fixed_phy_status status = {
|
||
|
|
.link = 1,
|
||
|
|
.speed = SPEED_100,
|
||
|
|
.duplex = DUPLEX_FULL,
|
||
|
|
};
|
||
|
|
unsigned int i, ret;
|
||
|
|
|
||
|
|
for (i = 0; i < NUM_FIXED_PHYS; i++)
|
||
|
|
phydevs[i] = fixed_phy_register(PHY_POLL, &status, NULL);
|
||
|
|
|
||
|
|
ret = mdio_driver_register(&dsa_loop_drv);
|
||
|
|
if (ret)
|
||
|
|
dsa_loop_phydevs_unregister();
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
module_init(dsa_loop_init);
|
||
|
|
|
||
|
|
static void __exit dsa_loop_exit(void)
|
||
|
|
{
|
||
|
|
mdio_driver_unregister(&dsa_loop_drv);
|
||
|
|
dsa_loop_phydevs_unregister();
|
||
|
|
}
|
||
|
|
module_exit(dsa_loop_exit);
|
||
|
|
|
||
|
|
MODULE_SOFTDEP("pre: dsa_loop_bdinfo");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_AUTHOR("Florian Fainelli");
|
||
|
|
MODULE_DESCRIPTION("DSA loopback driver");
|