[mirror_ubuntu-bionic-kernel.git] / drivers / net / dsa / dsa_loop.c

/*
 * 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/ethtool.h>
#include <linux/workqueue.h>
#include <linux/module.h>
#include <linux/if_bridge.h>
#include <net/dsa.h>

#include "dsa_loop.h"

struct dsa_loop_vlan {
	u16 members;
	u16 untagged;
};

struct dsa_loop_mib_entry {
	char name[ETH_GSTRING_LEN];
	unsigned long val;
};

enum dsa_loop_mib_counters {
	DSA_LOOP_PHY_READ_OK,
	DSA_LOOP_PHY_READ_ERR,
	DSA_LOOP_PHY_WRITE_OK,
	DSA_LOOP_PHY_WRITE_ERR,
	__DSA_LOOP_CNT_MAX,
};

static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
	[DSA_LOOP_PHY_READ_OK]	= { "phy_read_ok", },
	[DSA_LOOP_PHY_READ_ERR]	= { "phy_read_err", },
	[DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
	[DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
};

struct dsa_loop_port {
	struct dsa_loop_mib_entry mib[__DSA_LOOP_CNT_MAX];
};

#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;
	struct dsa_loop_port ports[DSA_MAX_PORTS];
	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)
{
	struct dsa_loop_priv *ps = ds->priv;
	unsigned int i;

	for (i = 0; i < ds->num_ports; i++)
		memcpy(ps->ports[i].mib, dsa_loop_mibs,
		       sizeof(dsa_loop_mibs));

	dev_dbg(ds->dev, "%s\n", __func__);

	return 0;
}

static int dsa_loop_get_sset_count(struct dsa_switch *ds)
{
	return __DSA_LOOP_CNT_MAX;
}

static void dsa_loop_get_strings(struct dsa_switch *ds, int port, uint8_t *data)
{
	struct dsa_loop_priv *ps = ds->priv;
	unsigned int i;

	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
		memcpy(data + i * ETH_GSTRING_LEN,
		       ps->ports[port].mib[i].name, ETH_GSTRING_LEN);
}

static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
				       uint64_t *data)
{
	struct dsa_loop_priv *ps = ds->priv;
	unsigned int i;

	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
		data[i] = ps->ports[port].mib[i].val;
}

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;
	int ret;

	dev_dbg(ds->dev, "%s\n", __func__);

	ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
	if (ret < 0)
		ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
	else
		ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;

	return ret;
}

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;
	int ret;

	dev_dbg(ds->dev, "%s\n", __func__);

	ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
	if (ret < 0)
		ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
	else
		ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;

	return ret;
}

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 = ps->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,
				   switchdev_obj_dump_cb_t *cb)
{
	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 = 0;

	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,
	.get_strings		= dsa_loop_get_strings,
	.get_ethtool_stats	= dsa_loop_get_ethtool_stats,
	.get_sset_count		= dsa_loop_get_sset_count,
	.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);
	if (!ps)
		return -ENOMEM;

	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);
}

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 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)
{
	unsigned int i;

	mdio_driver_unregister(&dsa_loop_drv);
	for (i = 0; i < NUM_FIXED_PHYS; i++)
		if (phydevs[i])
			fixed_phy_unregister(phydevs[i]);
}
module_exit(dsa_loop_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Florian Fainelli");
MODULE_DESCRIPTION("DSA loopback driver");
Commit	Line	Data
98cd1552 FF	1	/*
	2	* Distributed Switch Architecture loopback driver
	3	*
	4	* Copyright (C) 2016, Florian Fainelli <f.fainelli@gmail.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11
	12	#include <linux/platform_device.h>
	13	#include <linux/netdevice.h>
	14	#include <linux/phy.h>
	15	#include <linux/phy_fixed.h>
	16	#include <linux/export.h>
484c0172	17	#include <linux/ethtool.h>
98cd1552 FF	18	#include <linux/workqueue.h>
	19	#include <linux/module.h>
	20	#include <linux/if_bridge.h>
98cd1552 FF	21	#include <net/dsa.h>
	22
	23	#include "dsa_loop.h"
	24
	25	struct dsa_loop_vlan {
	26	u16 members;
	27	u16 untagged;
	28	};
	29
484c0172 FF	30	struct dsa_loop_mib_entry {
	31	char name[ETH_GSTRING_LEN];
	32	unsigned long val;
	33	};
	34
	35	enum dsa_loop_mib_counters {
	36	DSA_LOOP_PHY_READ_OK,
	37	DSA_LOOP_PHY_READ_ERR,
	38	DSA_LOOP_PHY_WRITE_OK,
	39	DSA_LOOP_PHY_WRITE_ERR,
	40	__DSA_LOOP_CNT_MAX,
	41	};
	42
	43	static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
	44	[DSA_LOOP_PHY_READ_OK] = { "phy_read_ok", },
	45	[DSA_LOOP_PHY_READ_ERR] = { "phy_read_err", },
	46	[DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
	47	[DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
	48	};
	49
	50	struct dsa_loop_port {
	51	struct dsa_loop_mib_entry mib[__DSA_LOOP_CNT_MAX];
	52	};
	53
98cd1552 FF	54	#define DSA_LOOP_VLANS 5
	55
	56	struct dsa_loop_priv {
	57	struct mii_bus *bus;
	58	unsigned int port_base;
	59	struct dsa_loop_vlan vlans[DSA_LOOP_VLANS];
	60	struct net_device *netdev;
484c0172	61	struct dsa_loop_port ports[DSA_MAX_PORTS];
98cd1552 FF	62	u16 pvid;
	63	};
	64
	65	static struct phy_device *phydevs[PHY_MAX_ADDR];
	66
	67	static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds)
	68	{
	69	dev_dbg(ds->dev, "%s\n", __func__);
	70
	71	return DSA_TAG_PROTO_NONE;
	72	}
	73
	74	static int dsa_loop_setup(struct dsa_switch *ds)
	75	{
484c0172 FF	76	struct dsa_loop_priv *ps = ds->priv;
	77	unsigned int i;
	78
	79	for (i = 0; i < ds->num_ports; i++)
	80	memcpy(ps->ports[i].mib, dsa_loop_mibs,
	81	sizeof(dsa_loop_mibs));
	82
98cd1552 FF	83	dev_dbg(ds->dev, "%s\n", __func__);
	84
	85	return 0;
	86	}
	87
484c0172 FF	88	static int dsa_loop_get_sset_count(struct dsa_switch *ds)
	89	{
	90	return __DSA_LOOP_CNT_MAX;
	91	}
	92
	93	static void dsa_loop_get_strings(struct dsa_switch ds, int port, uint8_t data)
	94	{
	95	struct dsa_loop_priv *ps = ds->priv;
	96	unsigned int i;
	97
	98	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
	99	memcpy(data + i * ETH_GSTRING_LEN,
	100	ps->ports[port].mib[i].name, ETH_GSTRING_LEN);
	101	}
	102
	103	static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
	104	uint64_t *data)
	105	{
	106	struct dsa_loop_priv *ps = ds->priv;
	107	unsigned int i;
	108
	109	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
	110	data[i] = ps->ports[port].mib[i].val;
	111	}
	112
98cd1552 FF	113	static int dsa_loop_set_addr(struct dsa_switch ds, u8 addr)
	114	{
	115	dev_dbg(ds->dev, "%s\n", __func__);
	116
	117	return 0;
	118	}
	119
	120	static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)
	121	{
	122	struct dsa_loop_priv *ps = ds->priv;
	123	struct mii_bus *bus = ps->bus;
484c0172	124	int ret;
98cd1552 FF	125
	126	dev_dbg(ds->dev, "%s\n", __func__);
	127
484c0172 FF	128	ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
	129	if (ret < 0)
	130	ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
	131	else
	132	ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;
	133
	134	return ret;
98cd1552 FF	135	}
	136
	137	static int dsa_loop_phy_write(struct dsa_switch *ds, int port,
	138	int regnum, u16 value)
	139	{
	140	struct dsa_loop_priv *ps = ds->priv;
	141	struct mii_bus *bus = ps->bus;
484c0172	142	int ret;
98cd1552 FF	143
	144	dev_dbg(ds->dev, "%s\n", __func__);
	145
484c0172 FF	146	ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
	147	if (ret < 0)
	148	ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
	149	else
	150	ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;
	151
	152	return ret;
98cd1552 FF	153	}
	154
	155	static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port,
	156	struct net_device *bridge)
	157	{
	158	dev_dbg(ds->dev, "%s\n", __func__);
	159
	160	return 0;
	161	}
	162
	163	static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
	164	struct net_device *bridge)
	165	{
	166	dev_dbg(ds->dev, "%s\n", __func__);
	167	}
	168
	169	static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port,
	170	u8 state)
	171	{
	172	dev_dbg(ds->dev, "%s\n", __func__);
	173	}
	174
	175	static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port,
	176	bool vlan_filtering)
	177	{
	178	dev_dbg(ds->dev, "%s\n", __func__);
	179
	180	return 0;
	181	}
	182
	183	static int dsa_loop_port_vlan_prepare(struct dsa_switch *ds, int port,
	184	const struct switchdev_obj_port_vlan *vlan,
	185	struct switchdev_trans *trans)
	186	{
	187	struct dsa_loop_priv *ps = ds->priv;
	188	struct mii_bus *bus = ps->bus;
	189
	190	dev_dbg(ds->dev, "%s\n", __func__);
	191
	192	/* Just do a sleeping operation to make lockdep checks effective */
	193	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	194
	195	if (vlan->vid_end > DSA_LOOP_VLANS)
	196	return -ERANGE;
	197
	198	return 0;
	199	}
	200
	201	static void dsa_loop_port_vlan_add(struct dsa_switch *ds, int port,
	202	const struct switchdev_obj_port_vlan *vlan,
	203	struct switchdev_trans *trans)
	204	{
	205	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	206	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
	207	struct dsa_loop_priv *ps = ds->priv;
	208	struct mii_bus *bus = ps->bus;
	209	struct dsa_loop_vlan *vl;
	210	u16 vid;
	211
	212	dev_dbg(ds->dev, "%s\n", __func__);
	213
	214	/* Just do a sleeping operation to make lockdep checks effective */
	215	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	216
217	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
218	vl = &ps->vlans[vid];
219
220	vl->members \|= BIT(port);
221	if (untagged)
222	vl->untagged \|= BIT(port);
223	else
224	vl->untagged &= ~BIT(port);
225	}
226
227	if (pvid)
228	ps->pvid = vid;
229	}
230
231	static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port,
232	const struct switchdev_obj_port_vlan *vlan)
233	{
234	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
235	struct dsa_loop_priv *ps = ds->priv;
236	struct mii_bus *bus = ps->bus;
237	struct dsa_loop_vlan *vl;
5865ccce	238	u16 vid, pvid = ps->pvid;
98cd1552 FF	239
	240	dev_dbg(ds->dev, "%s\n", __func__);
	241
	242	/* Just do a sleeping operation to make lockdep checks effective */
	243	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	244
	245	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
	246	vl = &ps->vlans[vid];
	247
	248	vl->members &= ~BIT(port);
	249	if (untagged)
	250	vl->untagged &= ~BIT(port);
	251
	252	if (pvid == vid)
	253	pvid = 1;
	254	}
	255	ps->pvid = pvid;
	256
	257	return 0;
	258	}
	259
	260	static int dsa_loop_port_vlan_dump(struct dsa_switch *ds, int port,
	261	struct switchdev_obj_port_vlan *vlan,
438ff537	262	switchdev_obj_dump_cb_t *cb)
98cd1552 FF	263	{
	264	struct dsa_loop_priv *ps = ds->priv;
	265	struct mii_bus *bus = ps->bus;
	266	struct dsa_loop_vlan *vl;
	267	u16 vid, vid_start = 0;
d1db799e	268	int err = 0;
98cd1552 FF	269
	270	dev_dbg(ds->dev, "%s\n", __func__);
	271
	272	/* Just do a sleeping operation to make lockdep checks effective */
	273	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	274
	275	for (vid = vid_start; vid < DSA_LOOP_VLANS; vid++) {
	276	vl = &ps->vlans[vid];
	277
	278	if (!(vl->members & BIT(port)))
	279	continue;
	280
	281	vlan->vid_begin = vlan->vid_end = vid;
	282	vlan->flags = 0;
	283
	284	if (vl->untagged & BIT(port))
	285	vlan->flags \|= BRIDGE_VLAN_INFO_UNTAGGED;
	286	if (ps->pvid == vid)
	287	vlan->flags \|= BRIDGE_VLAN_INFO_PVID;
	288
	289	err = cb(&vlan->obj);
	290	if (err)
	291	break;
	292	}
	293
	294	return err;
	295	}
	296
	297	static struct dsa_switch_ops dsa_loop_driver = {
	298	.get_tag_protocol = dsa_loop_get_protocol,
	299	.setup = dsa_loop_setup,
484c0172 FF	300	.get_strings = dsa_loop_get_strings,
	301	.get_ethtool_stats = dsa_loop_get_ethtool_stats,
	302	.get_sset_count = dsa_loop_get_sset_count,
98cd1552 FF	303	.set_addr = dsa_loop_set_addr,
	304	.phy_read = dsa_loop_phy_read,
	305	.phy_write = dsa_loop_phy_write,
	306	.port_bridge_join = dsa_loop_port_bridge_join,
	307	.port_bridge_leave = dsa_loop_port_bridge_leave,
	308	.port_stp_state_set = dsa_loop_port_stp_state_set,
	309	.port_vlan_filtering = dsa_loop_port_vlan_filtering,
	310	.port_vlan_prepare = dsa_loop_port_vlan_prepare,
	311	.port_vlan_add = dsa_loop_port_vlan_add,
	312	.port_vlan_del = dsa_loop_port_vlan_del,
	313	.port_vlan_dump = dsa_loop_port_vlan_dump,
	314	};
	315
	316	static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
	317	{
	318	struct dsa_loop_pdata *pdata = mdiodev->dev.platform_data;
	319	struct dsa_loop_priv *ps;
	320	struct dsa_switch *ds;
	321
	322	if (!pdata)
	323	return -ENODEV;
	324
	325	dev_info(&mdiodev->dev, "%s: 0x%0x\n",
	326	pdata->name, pdata->enabled_ports);
	327
	328	ds = dsa_switch_alloc(&mdiodev->dev, DSA_MAX_PORTS);
	329	if (!ds)
	330	return -ENOMEM;
	331
	332	ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
8ce7aaaa CJ	333	if (!ps)
	334	return -ENOMEM;
	335
98cd1552 FF	336	ps->netdev = dev_get_by_name(&init_net, pdata->netdev);
	337	if (!ps->netdev)
	338	return -EPROBE_DEFER;
	339
	340	pdata->cd.netdev[DSA_LOOP_CPU_PORT] = &ps->netdev->dev;
	341
	342	ds->dev = &mdiodev->dev;
	343	ds->ops = &dsa_loop_driver;
	344	ds->priv = ps;
	345	ps->bus = mdiodev->bus;
	346
	347	dev_set_drvdata(&mdiodev->dev, ds);
	348
23c9ee49	349	return dsa_register_switch(ds);
98cd1552 FF	350	}
	351
	352	static void dsa_loop_drv_remove(struct mdio_device *mdiodev)
	353	{
	354	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
	355	struct dsa_loop_priv *ps = ds->priv;
	356
	357	dsa_unregister_switch(ds);
	358	dev_put(ps->netdev);
	359	}
	360
	361	static struct mdio_driver dsa_loop_drv = {
	362	.mdiodrv.driver = {
	363	.name = "dsa-loop",
	364	},
	365	.probe = dsa_loop_drv_probe,
	366	.remove = dsa_loop_drv_remove,
	367	};
	368
	369	#define NUM_FIXED_PHYS (DSA_LOOP_NUM_PORTS - 2)
	370
98cd1552 FF	371	static int __init dsa_loop_init(void)
	372	{
	373	struct fixed_phy_status status = {
	374	.link = 1,
	375	.speed = SPEED_100,
	376	.duplex = DUPLEX_FULL,
	377	};
	378	unsigned int i;
	379
	380	for (i = 0; i < NUM_FIXED_PHYS; i++)
	381	phydevs[i] = fixed_phy_register(PHY_POLL, &status, -1, NULL);
	382
	383	return mdio_driver_register(&dsa_loop_drv);
	384	}
	385	module_init(dsa_loop_init);
	386
	387	static void __exit dsa_loop_exit(void)
	388	{
3407dc8e FF	389	unsigned int i;
3407dc8e FF	390
98cd1552	391	mdio_driver_unregister(&dsa_loop_drv);
3407dc8e FF	392	for (i = 0; i < NUM_FIXED_PHYS; i++)
	393	if (phydevs[i])
	394	fixed_phy_unregister(phydevs[i]);
98cd1552 FF	395	}
	396	module_exit(dsa_loop_exit);
	397
	398	MODULE_LICENSE("GPL");
	399	MODULE_AUTHOR("Florian Fainelli");
	400	MODULE_DESCRIPTION("DSA loopback driver");