[thirdparty/linux.git] / drivers / net / dsa / dsa_loop.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Distributed Switch Architecture loopback driver
 *
 * Copyright (C) 2016, Florian Fainelli <f.fainelli@gmail.com>
 */

#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,
						   int port,
						   enum dsa_tag_protocol mp)
{
	dev_dbg(ds->dev, "%s: port: %d\n", __func__, port);

	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, int port, int sset)
{
	if (sset != ETH_SS_STATS && sset != ETH_SS_PHY_STATS)
		return 0;

	return __DSA_LOOP_CNT_MAX;
}

static void dsa_loop_get_strings(struct dsa_switch *ds, int port,
				 u32 stringset, uint8_t *data)
{
	struct dsa_loop_priv *ps = ds->priv;
	unsigned int i;

	if (stringset != ETH_SS_STATS && stringset != ETH_SS_PHY_STATS)
		return;

	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_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;

	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;

	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: port: %d, bridge: %s\n",
		__func__, port, bridge->name);

	return 0;
}

static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
				       struct net_device *bridge)
{
	dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
		__func__, port, bridge->name);
}

static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port,
					u8 state)
{
	dev_dbg(ds->dev, "%s: port: %d, state: %d\n",
		__func__, port, state);
}

static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port,
					bool vlan_filtering)
{
	dev_dbg(ds->dev, "%s: port: %d, vlan_filtering: %d\n",
		__func__, port, vlan_filtering);

	return 0;
}

static int
dsa_loop_port_vlan_prepare(struct dsa_switch *ds, int port,
			   const struct switchdev_obj_port_vlan *vlan)
{
	struct dsa_loop_priv *ps = ds->priv;
	struct mii_bus *bus = ps->bus;

	dev_dbg(ds->dev, "%s: port: %d, vlan: %d-%d",
		__func__, port, vlan->vid_begin, vlan->vid_end);

	/* 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)
{
	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;

	/* 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);

		dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
			__func__, port, vid, untagged ? "un" : "", pvid);
	}

	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;

	/* 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;

		dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
			__func__, port, vid, untagged ? "un" : "", pvid);
	}
	ps->pvid = pvid;

	return 0;
}

static const 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,
	.get_ethtool_phy_stats	= dsa_loop_get_ethtool_stats,
	.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,
};

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 = devm_kzalloc(&mdiodev->dev, sizeof(*ds), GFP_KERNEL);
	if (!ds)
		return -ENOMEM;

	ds->dev = &mdiodev->dev;
	ds->num_ports = DSA_MAX_PORTS;

	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, 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 (!IS_ERR(phydevs[i]))
			fixed_phy_unregister(phydevs[i]);
}
module_exit(dsa_loop_exit);

MODULE_SOFTDEP("pre: dsa_loop_bdinfo");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Florian Fainelli");
MODULE_DESCRIPTION("DSA loopback driver");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
98cd1552 FF	2	/*
	3	* Distributed Switch Architecture loopback driver
	4	*
	5	* Copyright (C) 2016, Florian Fainelli <f.fainelli@gmail.com>
98cd1552 FF	6	*/
	7
	8	#include <linux/platform_device.h>
	9	#include <linux/netdevice.h>
	10	#include <linux/phy.h>
	11	#include <linux/phy_fixed.h>
	12	#include <linux/export.h>
484c0172	13	#include <linux/ethtool.h>
98cd1552 FF	14	#include <linux/workqueue.h>
	15	#include <linux/module.h>
	16	#include <linux/if_bridge.h>
98cd1552 FF	17	#include <net/dsa.h>
	18
	19	#include "dsa_loop.h"
	20
	21	struct dsa_loop_vlan {
	22	u16 members;
	23	u16 untagged;
	24	};
	25
484c0172 FF	26	struct dsa_loop_mib_entry {
	27	char name[ETH_GSTRING_LEN];
	28	unsigned long val;
	29	};
	30
	31	enum dsa_loop_mib_counters {
	32	DSA_LOOP_PHY_READ_OK,
	33	DSA_LOOP_PHY_READ_ERR,
	34	DSA_LOOP_PHY_WRITE_OK,
	35	DSA_LOOP_PHY_WRITE_ERR,
	36	__DSA_LOOP_CNT_MAX,
	37	};
	38
	39	static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
	40	[DSA_LOOP_PHY_READ_OK] = { "phy_read_ok", },
	41	[DSA_LOOP_PHY_READ_ERR] = { "phy_read_err", },
	42	[DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
	43	[DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
	44	};
	45
	46	struct dsa_loop_port {
	47	struct dsa_loop_mib_entry mib[__DSA_LOOP_CNT_MAX];
	48	};
	49
98cd1552 FF	50	#define DSA_LOOP_VLANS 5
	51
	52	struct dsa_loop_priv {
	53	struct mii_bus *bus;
	54	unsigned int port_base;
	55	struct dsa_loop_vlan vlans[DSA_LOOP_VLANS];
	56	struct net_device *netdev;
484c0172	57	struct dsa_loop_port ports[DSA_MAX_PORTS];
98cd1552 FF	58	u16 pvid;
	59	};
	60
	61	static struct phy_device *phydevs[PHY_MAX_ADDR];
	62
5ed4e3eb	63	static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds,
4d776482 FF	64	int port,
4d776482 FF	65	enum dsa_tag_protocol mp)
98cd1552	66	{
e52cde71	67	dev_dbg(ds->dev, "%s: port: %d\n", __func__, port);
98cd1552 FF	68
	69	return DSA_TAG_PROTO_NONE;
	70	}
	71
	72	static int dsa_loop_setup(struct dsa_switch *ds)
	73	{
484c0172 FF	74	struct dsa_loop_priv *ps = ds->priv;
	75	unsigned int i;
	76
	77	for (i = 0; i < ds->num_ports; i++)
	78	memcpy(ps->ports[i].mib, dsa_loop_mibs,
	79	sizeof(dsa_loop_mibs));
	80
98cd1552 FF	81	dev_dbg(ds->dev, "%s\n", __func__);
	82
	83	return 0;
	84	}
	85
89f09048	86	static int dsa_loop_get_sset_count(struct dsa_switch *ds, int port, int sset)
484c0172	87	{
96cbddcd	88	if (sset != ETH_SS_STATS && sset != ETH_SS_PHY_STATS)
89f09048 FF	89	return 0;
89f09048 FF	90
484c0172 FF	91	return __DSA_LOOP_CNT_MAX;
	92	}
	93
89f09048 FF	94	static void dsa_loop_get_strings(struct dsa_switch *ds, int port,
89f09048 FF	95	u32 stringset, uint8_t *data)
484c0172 FF	96	{
	97	struct dsa_loop_priv *ps = ds->priv;
	98	unsigned int i;
	99
96cbddcd	100	if (stringset != ETH_SS_STATS && stringset != ETH_SS_PHY_STATS)
89f09048 FF	101	return;
89f09048 FF	102
484c0172 FF	103	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
	104	memcpy(data + i * ETH_GSTRING_LEN,
	105	ps->ports[port].mib[i].name, ETH_GSTRING_LEN);
	106	}
	107
	108	static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
	109	uint64_t *data)
	110	{
	111	struct dsa_loop_priv *ps = ds->priv;
	112	unsigned int i;
	113
	114	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
	115	data[i] = ps->ports[port].mib[i].val;
	116	}
	117
98cd1552 FF	118	static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)
	119	{
	120	struct dsa_loop_priv *ps = ds->priv;
	121	struct mii_bus *bus = ps->bus;
484c0172	122	int ret;
98cd1552	123
484c0172 FF	124	ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
	125	if (ret < 0)
	126	ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
	127	else
	128	ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;
	129
	130	return ret;
98cd1552 FF	131	}
	132
	133	static int dsa_loop_phy_write(struct dsa_switch *ds, int port,
	134	int regnum, u16 value)
	135	{
	136	struct dsa_loop_priv *ps = ds->priv;
	137	struct mii_bus *bus = ps->bus;
484c0172	138	int ret;
98cd1552	139
484c0172 FF	140	ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
	141	if (ret < 0)
	142	ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
	143	else
	144	ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;
	145
	146	return ret;
98cd1552 FF	147	}
	148
	149	static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port,
	150	struct net_device *bridge)
	151	{
e52cde71 FF	152	dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
e52cde71 FF	153	__func__, port, bridge->name);
98cd1552 FF	154
	155	return 0;
	156	}
	157
	158	static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
	159	struct net_device *bridge)
	160	{
e52cde71 FF	161	dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
e52cde71 FF	162	__func__, port, bridge->name);
98cd1552 FF	163	}
	164
	165	static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port,
	166	u8 state)
	167	{
e52cde71 FF	168	dev_dbg(ds->dev, "%s: port: %d, state: %d\n",
e52cde71 FF	169	__func__, port, state);
98cd1552 FF	170	}
	171
	172	static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port,
	173	bool vlan_filtering)
	174	{
e52cde71 FF	175	dev_dbg(ds->dev, "%s: port: %d, vlan_filtering: %d\n",
e52cde71 FF	176	__func__, port, vlan_filtering);
98cd1552 FF	177
	178	return 0;
	179	}
	180
80e02360 VD	181	static int
	182	dsa_loop_port_vlan_prepare(struct dsa_switch *ds, int port,
	183	const struct switchdev_obj_port_vlan *vlan)
98cd1552 FF	184	{
	185	struct dsa_loop_priv *ps = ds->priv;
	186	struct mii_bus *bus = ps->bus;
	187
e52cde71 FF	188	dev_dbg(ds->dev, "%s: port: %d, vlan: %d-%d",
e52cde71 FF	189	__func__, port, vlan->vid_begin, vlan->vid_end);
98cd1552 FF	190
	191	/* Just do a sleeping operation to make lockdep checks effective */
	192	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	193
	194	if (vlan->vid_end > DSA_LOOP_VLANS)
	195	return -ERANGE;
	196
	197	return 0;
	198	}
	199
	200	static void dsa_loop_port_vlan_add(struct dsa_switch *ds, int port,
80e02360	201	const struct switchdev_obj_port_vlan *vlan)
98cd1552 FF	202	{
	203	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	204	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
	205	struct dsa_loop_priv *ps = ds->priv;
	206	struct mii_bus *bus = ps->bus;
	207	struct dsa_loop_vlan *vl;
	208	u16 vid;
	209
98cd1552 FF	210	/* Just do a sleeping operation to make lockdep checks effective */
	211	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	212
	213	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
	214	vl = &ps->vlans[vid];
	215
	216	vl->members \|= BIT(port);
	217	if (untagged)
	218	vl->untagged \|= BIT(port);
	219	else
	220	vl->untagged &= ~BIT(port);
e52cde71 FF	221
	222	dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
	223	__func__, port, vid, untagged ? "un" : "", pvid);
98cd1552 FF	224	}
	225
	226	if (pvid)
	227	ps->pvid = vid;
	228	}
	229
	230	static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port,
	231	const struct switchdev_obj_port_vlan *vlan)
	232	{
	233	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	234	struct dsa_loop_priv *ps = ds->priv;
	235	struct mii_bus *bus = ps->bus;
	236	struct dsa_loop_vlan *vl;
5865ccce	237	u16 vid, pvid = ps->pvid;
98cd1552	238
98cd1552 FF	239	/* Just do a sleeping operation to make lockdep checks effective */
	240	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	241
	242	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
	243	vl = &ps->vlans[vid];
	244
	245	vl->members &= ~BIT(port);
	246	if (untagged)
	247	vl->untagged &= ~BIT(port);
	248
	249	if (pvid == vid)
	250	pvid = 1;
e52cde71 FF	251
	252	dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
	253	__func__, port, vid, untagged ? "un" : "", pvid);
98cd1552 FF	254	}
	255	ps->pvid = pvid;
	256
	257	return 0;
	258	}
	259
d78d6776	260	static const struct dsa_switch_ops dsa_loop_driver = {
98cd1552 FF	261	.get_tag_protocol = dsa_loop_get_protocol,
98cd1552 FF	262	.setup = dsa_loop_setup,
484c0172 FF	263	.get_strings = dsa_loop_get_strings,
	264	.get_ethtool_stats = dsa_loop_get_ethtool_stats,
	265	.get_sset_count = dsa_loop_get_sset_count,
96cbddcd	266	.get_ethtool_phy_stats = dsa_loop_get_ethtool_stats,
98cd1552 FF	267	.phy_read = dsa_loop_phy_read,
	268	.phy_write = dsa_loop_phy_write,
	269	.port_bridge_join = dsa_loop_port_bridge_join,
	270	.port_bridge_leave = dsa_loop_port_bridge_leave,
	271	.port_stp_state_set = dsa_loop_port_stp_state_set,
	272	.port_vlan_filtering = dsa_loop_port_vlan_filtering,
	273	.port_vlan_prepare = dsa_loop_port_vlan_prepare,
	274	.port_vlan_add = dsa_loop_port_vlan_add,
	275	.port_vlan_del = dsa_loop_port_vlan_del,
98cd1552 FF	276	};
	277
	278	static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
	279	{
	280	struct dsa_loop_pdata *pdata = mdiodev->dev.platform_data;
	281	struct dsa_loop_priv *ps;
	282	struct dsa_switch *ds;
	283
	284	if (!pdata)
	285	return -ENODEV;
	286
	287	dev_info(&mdiodev->dev, "%s: 0x%0x\n",
	288	pdata->name, pdata->enabled_ports);
	289
7e99e347	290	ds = devm_kzalloc(&mdiodev->dev, sizeof(*ds), GFP_KERNEL);
98cd1552 FF	291	if (!ds)
	292	return -ENOMEM;
	293
7e99e347 VD	294	ds->dev = &mdiodev->dev;
	295	ds->num_ports = DSA_MAX_PORTS;
	296
98cd1552	297	ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
8ce7aaaa CJ	298	if (!ps)
	299	return -ENOMEM;
	300
98cd1552 FF	301	ps->netdev = dev_get_by_name(&init_net, pdata->netdev);
	302	if (!ps->netdev)
	303	return -EPROBE_DEFER;
	304
	305	pdata->cd.netdev[DSA_LOOP_CPU_PORT] = &ps->netdev->dev;
	306
	307	ds->dev = &mdiodev->dev;
	308	ds->ops = &dsa_loop_driver;
	309	ds->priv = ps;
	310	ps->bus = mdiodev->bus;
	311
	312	dev_set_drvdata(&mdiodev->dev, ds);
	313
23c9ee49	314	return dsa_register_switch(ds);
98cd1552 FF	315	}
	316
	317	static void dsa_loop_drv_remove(struct mdio_device *mdiodev)
	318	{
	319	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
	320	struct dsa_loop_priv *ps = ds->priv;
	321
	322	dsa_unregister_switch(ds);
	323	dev_put(ps->netdev);
	324	}
	325
	326	static struct mdio_driver dsa_loop_drv = {
	327	.mdiodrv.driver = {
	328	.name = "dsa-loop",
	329	},
	330	.probe = dsa_loop_drv_probe,
	331	.remove = dsa_loop_drv_remove,
	332	};
	333
	334	#define NUM_FIXED_PHYS (DSA_LOOP_NUM_PORTS - 2)
	335
98cd1552 FF	336	static int __init dsa_loop_init(void)
	337	{
	338	struct fixed_phy_status status = {
	339	.link = 1,
	340	.speed = SPEED_100,
	341	.duplex = DUPLEX_FULL,
	342	};
	343	unsigned int i;
	344
	345	for (i = 0; i < NUM_FIXED_PHYS; i++)
5468e82f	346	phydevs[i] = fixed_phy_register(PHY_POLL, &status, NULL);
98cd1552 FF	347
	348	return mdio_driver_register(&dsa_loop_drv);
	349	}
	350	module_init(dsa_loop_init);
	351
	352	static void __exit dsa_loop_exit(void)
	353	{
3407dc8e FF	354	unsigned int i;
3407dc8e FF	355
98cd1552	356	mdio_driver_unregister(&dsa_loop_drv);
3407dc8e	357	for (i = 0; i < NUM_FIXED_PHYS; i++)
6d9c153a	358	if (!IS_ERR(phydevs[i]))
3407dc8e	359	fixed_phy_unregister(phydevs[i]);
98cd1552 FF	360	}
	361	module_exit(dsa_loop_exit);
	362
3047211c	363	MODULE_SOFTDEP("pre: dsa_loop_bdinfo");
98cd1552 FF	364	MODULE_LICENSE("GPL");
	365	MODULE_AUTHOR("Florian Fainelli");
	366	MODULE_DESCRIPTION("DSA loopback driver");