diff options
| -rw-r--r-- | drivers/net/dsa/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/net/dsa/Makefile | 2 | ||||
| -rw-r--r-- | drivers/net/dsa/dsa_loop.c | 328 | ||||
| -rw-r--r-- | drivers/net/dsa/dsa_loop.h | 19 | ||||
| -rw-r--r-- | drivers/net/dsa/dsa_loop_bdinfo.c | 34 |
5 files changed, 390 insertions, 1 deletions
diff --git a/drivers/net/dsa/Kconfig b/drivers/net/dsa/Kconfig index 564b267c8428..ba2e655eec19 100644 --- a/drivers/net/dsa/Kconfig +++ b/drivers/net/dsa/Kconfig @@ -34,4 +34,12 @@ config NET_DSA_QCA8K This enables support for the Qualcomm Atheros QCA8K Ethernet switch chips. +config NET_DSA_LOOP + tristate "DSA mock-up Ethernet switch chip support" + depends on NET_DSA + select FIXED_PHY + ---help--- + This enables support for a fake mock-up switch chip which + exercises the DSA APIs. + endmenu diff --git a/drivers/net/dsa/Makefile b/drivers/net/dsa/Makefile index a3c941632217..5c8830991041 100644 --- a/drivers/net/dsa/Makefile +++ b/drivers/net/dsa/Makefile @@ -2,6 +2,6 @@ obj-$(CONFIG_NET_DSA_MV88E6060) += mv88e6060.o obj-$(CONFIG_NET_DSA_BCM_SF2) += bcm-sf2.o bcm-sf2-objs := bcm_sf2.o bcm_sf2_cfp.o obj-$(CONFIG_NET_DSA_QCA8K) += qca8k.o - obj-y += b53/ obj-y += mv88e6xxx/ +obj-$(CONFIG_NET_DSA_LOOP) += dsa_loop.o dsa_loop_bdinfo.o diff --git a/drivers/net/dsa/dsa_loop.c b/drivers/net/dsa/dsa_loop.c new file mode 100644 index 000000000000..bc5acc15edbf --- /dev/null +++ b/drivers/net/dsa/dsa_loop.c @@ -0,0 +1,328 @@ +/* + * Distributed Switch Architecture loopback driver + * + * Copyright (C) 2016, Florian Fainelli <f.fainelli@gmail.com> + * + * 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/platform_device.h> +#include <linux/netdevice.h> +#include <linux/phy.h> +#include <linux/phy_fixed.h> +#include <linux/export.h> +#include <linux/workqueue.h> +#include <linux/module.h> +#include <linux/if_bridge.h> +#include <net/switchdev.h> +#include <net/dsa.h> + +#include "dsa_loop.h" + +struct dsa_loop_vlan { + u16 members; + u16 untagged; +}; + +#define DSA_LOOP_VLANS 5 + +struct dsa_loop_priv { + struct mii_bus *bus; + unsigned int port_base; + struct dsa_loop_vlan vlans[DSA_LOOP_VLANS]; + struct net_device *netdev; + u16 pvid; +}; + +static struct phy_device *phydevs[PHY_MAX_ADDR]; + +static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds) +{ + dev_dbg(ds->dev, "%s\n", __func__); + + return DSA_TAG_PROTO_NONE; +} + +static int dsa_loop_setup(struct dsa_switch *ds) +{ + dev_dbg(ds->dev, "%s\n", __func__); + + return 0; +} + +static int dsa_loop_set_addr(struct dsa_switch *ds, u8 *addr) +{ + dev_dbg(ds->dev, "%s\n", __func__); + + return 0; +} + +static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum) +{ + struct dsa_loop_priv *ps = ds->priv; + struct mii_bus *bus = ps->bus; + + dev_dbg(ds->dev, "%s\n", __func__); + + return mdiobus_read_nested(bus, ps->port_base + port, regnum); +} + +static int dsa_loop_phy_write(struct dsa_switch *ds, int port, + int regnum, u16 value) +{ + struct dsa_loop_priv *ps = ds->priv; + struct mii_bus *bus = ps->bus; + + dev_dbg(ds->dev, "%s\n", __func__); + + return mdiobus_write_nested(bus, ps->port_base + port, regnum, value); +} + +static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port, + struct net_device *bridge) +{ + dev_dbg(ds->dev, "%s\n", __func__); + + return 0; +} + +static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port, + struct net_device *bridge) +{ + dev_dbg(ds->dev, "%s\n", __func__); +} + +static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port, + u8 state) +{ + dev_dbg(ds->dev, "%s\n", __func__); +} + +static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port, + bool vlan_filtering) +{ + dev_dbg(ds->dev, "%s\n", __func__); + + return 0; +} + +static int dsa_loop_port_vlan_prepare(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_vlan *vlan, + struct switchdev_trans *trans) +{ + struct dsa_loop_priv *ps = ds->priv; + struct mii_bus *bus = ps->bus; + + dev_dbg(ds->dev, "%s\n", __func__); + + /* Just do a sleeping operation to make lockdep checks effective */ + mdiobus_read(bus, ps->port_base + port, MII_BMSR); + + if (vlan->vid_end > DSA_LOOP_VLANS) + return -ERANGE; + + return 0; +} + +static void dsa_loop_port_vlan_add(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_vlan *vlan, + struct switchdev_trans *trans) +{ + bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; + bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID; + struct dsa_loop_priv *ps = ds->priv; + struct mii_bus *bus = ps->bus; + struct dsa_loop_vlan *vl; + u16 vid; + + dev_dbg(ds->dev, "%s\n", __func__); + + /* Just do a sleeping operation to make lockdep checks effective */ + mdiobus_read(bus, ps->port_base + port, MII_BMSR); + + for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) { + vl = &ps->vlans[vid]; + + vl->members |= BIT(port); + if (untagged) + vl->untagged |= BIT(port); + else + vl->untagged &= ~BIT(port); + } + + if (pvid) + ps->pvid = vid; +} + +static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_vlan *vlan) +{ + bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; + struct dsa_loop_priv *ps = ds->priv; + struct mii_bus *bus = ps->bus; + struct dsa_loop_vlan *vl; + u16 vid, pvid; + + dev_dbg(ds->dev, "%s\n", __func__); + + /* Just do a sleeping operation to make lockdep checks effective */ + mdiobus_read(bus, ps->port_base + port, MII_BMSR); + + for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) { + vl = &ps->vlans[vid]; + + vl->members &= ~BIT(port); + if (untagged) + vl->untagged &= ~BIT(port); + + if (pvid == vid) + pvid = 1; + } + ps->pvid = pvid; + + return 0; +} + +static int dsa_loop_port_vlan_dump(struct dsa_switch *ds, int port, + struct switchdev_obj_port_vlan *vlan, + int (*cb)(struct switchdev_obj *obj)) +{ + struct dsa_loop_priv *ps = ds->priv; + struct mii_bus *bus = ps->bus; + struct dsa_loop_vlan *vl; + u16 vid, vid_start = 0; + int err; + + dev_dbg(ds->dev, "%s\n", __func__); + + /* Just do a sleeping operation to make lockdep checks effective */ + mdiobus_read(bus, ps->port_base + port, MII_BMSR); + + for (vid = vid_start; vid < DSA_LOOP_VLANS; vid++) { + vl = &ps->vlans[vid]; + + if (!(vl->members & BIT(port))) + continue; + + vlan->vid_begin = vlan->vid_end = vid; + vlan->flags = 0; + + if (vl->untagged & BIT(port)) + vlan->flags |= BRIDGE_VLAN_INFO_UNTAGGED; + if (ps->pvid == vid) + vlan->flags |= BRIDGE_VLAN_INFO_PVID; + + err = cb(&vlan->obj); + if (err) + break; + } + + return err; +} + +static struct dsa_switch_ops dsa_loop_driver = { + .get_tag_protocol = dsa_loop_get_protocol, + .setup = dsa_loop_setup, + .set_addr = dsa_loop_set_addr, + .phy_read = dsa_loop_phy_read, + .phy_write = dsa_loop_phy_write, + .port_bridge_join = dsa_loop_port_bridge_join, + .port_bridge_leave = dsa_loop_port_bridge_leave, + .port_stp_state_set = dsa_loop_port_stp_state_set, + .port_vlan_filtering = dsa_loop_port_vlan_filtering, + .port_vlan_prepare = dsa_loop_port_vlan_prepare, + .port_vlan_add = dsa_loop_port_vlan_add, + .port_vlan_del = dsa_loop_port_vlan_del, + .port_vlan_dump = dsa_loop_port_vlan_dump, +}; + +static int dsa_loop_drv_probe(struct mdio_device *mdiodev) +{ + struct dsa_loop_pdata *pdata = mdiodev->dev.platform_data; + struct dsa_loop_priv *ps; + struct dsa_switch *ds; + + if (!pdata) + return -ENODEV; + + dev_info(&mdiodev->dev, "%s: 0x%0x\n", + pdata->name, pdata->enabled_ports); + + ds = dsa_switch_alloc(&mdiodev->dev, DSA_MAX_PORTS); + if (!ds) + return -ENOMEM; + + ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL); + ps->netdev = dev_get_by_name(&init_net, pdata->netdev); + if (!ps->netdev) + return -EPROBE_DEFER; + + pdata->cd.netdev[DSA_LOOP_CPU_PORT] = &ps->netdev->dev; + + ds->dev = &mdiodev->dev; + ds->ops = &dsa_loop_driver; + ds->priv = ps; + ps->bus = mdiodev->bus; + + dev_set_drvdata(&mdiodev->dev, ds); + + return dsa_register_switch(ds, ds->dev); +} + +static void dsa_loop_drv_remove(struct mdio_device *mdiodev) +{ + struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev); + struct dsa_loop_priv *ps = ds->priv; + + dsa_unregister_switch(ds); + dev_put(ps->netdev); +} + +static struct mdio_driver dsa_loop_drv = { + .mdiodrv.driver = { + .name = "dsa-loop", + }, + .probe = dsa_loop_drv_probe, + .remove = dsa_loop_drv_remove, +}; + +#define NUM_FIXED_PHYS (DSA_LOOP_NUM_PORTS - 2) + +static void unregister_fixed_phys(void) +{ + unsigned int i; + + for (i = 0; i < NUM_FIXED_PHYS; i++) + if (phydevs[i]) + fixed_phy_unregister(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; + + for (i = 0; i < NUM_FIXED_PHYS; i++) + phydevs[i] = fixed_phy_register(PHY_POLL, &status, -1, NULL); + + return mdio_driver_register(&dsa_loop_drv); +} +module_init(dsa_loop_init); + +static void __exit dsa_loop_exit(void) +{ + mdio_driver_unregister(&dsa_loop_drv); + unregister_fixed_phys(); +} +module_exit(dsa_loop_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Florian Fainelli"); +MODULE_DESCRIPTION("DSA loopback driver"); diff --git a/drivers/net/dsa/dsa_loop.h b/drivers/net/dsa/dsa_loop.h new file mode 100644 index 000000000000..dc396877fc95 --- /dev/null +++ b/drivers/net/dsa/dsa_loop.h @@ -0,0 +1,19 @@ +#ifndef __DSA_LOOP_H +#define __DSA_LOOP_H + +struct dsa_chip_data; + +struct dsa_loop_pdata { + /* Must be first, such that dsa_register_switch() can access this + * without gory pointer manipulations + */ + struct dsa_chip_data cd; + const char *name; + unsigned int enabled_ports; + const char *netdev; +}; + +#define DSA_LOOP_NUM_PORTS 6 +#define DSA_LOOP_CPU_PORT (DSA_LOOP_NUM_PORTS - 1) + +#endif /* __DSA_LOOP_H */ diff --git a/drivers/net/dsa/dsa_loop_bdinfo.c b/drivers/net/dsa/dsa_loop_bdinfo.c new file mode 100644 index 000000000000..fb8d5dc71013 --- /dev/null +++ b/drivers/net/dsa/dsa_loop_bdinfo.c @@ -0,0 +1,34 @@ +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/phy.h> +#include <net/dsa.h> + +#include "dsa_loop.h" + +static struct dsa_loop_pdata dsa_loop_pdata = { + .cd = { + .port_names[0] = "lan1", + .port_names[1] = "lan2", + .port_names[2] = "lan3", + .port_names[3] = "lan4", + .port_names[DSA_LOOP_CPU_PORT] = "cpu", + }, + .name = "DSA mockup driver", + .enabled_ports = 0x1f, + .netdev = "eth0", +}; + +static const struct mdio_board_info bdinfo = { + .bus_id = "fixed-0", + .modalias = "dsa-loop", + .mdio_addr = 31, + .platform_data = &dsa_loop_pdata, +}; + +static int __init dsa_loop_bdinfo_init(void) +{ + return mdiobus_register_board_info(&bdinfo, 1); +} +arch_initcall(dsa_loop_bdinfo_init) + +MODULE_LICENSE("GPL"); |