[linux-block.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 <linux/dsa/loop.h>
#include <net/dsa.h>

#include "dsa_loop.h"

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", },
};

static struct phy_device *phydevs[PHY_MAX_ADDR];

enum dsa_loop_devlink_resource_id {
	DSA_LOOP_DEVLINK_PARAM_ID_VTU,
};

static u64 dsa_loop_devlink_vtu_get(void *priv)
{
	struct dsa_loop_priv *ps = priv;
	unsigned int i, count = 0;
	struct dsa_loop_vlan *vl;

	for (i = 0; i < ARRAY_SIZE(ps->vlans); i++) {
		vl = &ps->vlans[i];
		if (vl->members)
			count++;
	}

	return count;
}

static int dsa_loop_setup_devlink_resources(struct dsa_switch *ds)
{
	struct devlink_resource_size_params size_params;
	struct dsa_loop_priv *ps = ds->priv;
	int err;

	devlink_resource_size_params_init(&size_params, ARRAY_SIZE(ps->vlans),
					  ARRAY_SIZE(ps->vlans),
					  1, DEVLINK_RESOURCE_UNIT_ENTRY);

	err = dsa_devlink_resource_register(ds, "VTU", ARRAY_SIZE(ps->vlans),
					    DSA_LOOP_DEVLINK_PARAM_ID_VTU,
					    DEVLINK_RESOURCE_ID_PARENT_TOP,
					    &size_params);
	if (err)
		goto out;

	dsa_devlink_resource_occ_get_register(ds,
					      DSA_LOOP_DEVLINK_PARAM_ID_VTU,
					      dsa_loop_devlink_vtu_get, ps);

	return 0;

out:
	dsa_devlink_resources_unregister(ds);
	return err;
}

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 dsa_loop_setup_devlink_resources(ds);
}

static void dsa_loop_teardown(struct dsa_switch *ds)
{
	dsa_devlink_resources_unregister(ds);
}

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 dsa_bridge bridge,
				     bool *tx_fwd_offload,
				     struct netlink_ext_ack *extack)
{
	dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
		__func__, port, bridge.dev->name);

	return 0;
}

static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
				       struct dsa_bridge bridge)
{
	dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
		__func__, port, bridge.dev->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,
					struct netlink_ext_ack *extack)
{
	dev_dbg(ds->dev, "%s: port: %d, vlan_filtering: %d\n",
		__func__, port, vlan_filtering);

	return 0;
}

static int dsa_loop_port_vlan_add(struct dsa_switch *ds, int port,
				  const struct switchdev_obj_port_vlan *vlan,
				  struct netlink_ext_ack *extack)
{
	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;

	if (vlan->vid >= ARRAY_SIZE(ps->vlans))
		return -ERANGE;

	/* Just do a sleeping operation to make lockdep checks effective */
	mdiobus_read(bus, ps->port_base + port, MII_BMSR);

	vl = &ps->vlans[vlan->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, vlan->vid, untagged ? "un" : "", pvid);

	if (pvid)
		ps->ports[port].pvid = vlan->vid;

	return 0;
}

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;
	u16 pvid = ps->ports[port].pvid;
	struct mii_bus *bus = ps->bus;
	struct dsa_loop_vlan *vl;

	/* Just do a sleeping operation to make lockdep checks effective */
	mdiobus_read(bus, ps->port_base + port, MII_BMSR);

	vl = &ps->vlans[vlan->vid];

	vl->members &= ~BIT(port);
	if (untagged)
		vl->untagged &= ~BIT(port);

	if (pvid == vlan->vid)
		pvid = 1;

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

	return 0;
}

static int dsa_loop_port_change_mtu(struct dsa_switch *ds, int port,
				    int new_mtu)
{
	struct dsa_loop_priv *priv = ds->priv;

	priv->ports[port].mtu = new_mtu;

	return 0;
}

static int dsa_loop_port_max_mtu(struct dsa_switch *ds, int port)
{
	return ETH_MAX_MTU;
}

static void dsa_loop_phylink_get_caps(struct dsa_switch *dsa, int port,
				      struct phylink_config *config)
{
	bitmap_fill(config->supported_interfaces, PHY_INTERFACE_MODE_MAX);
	__clear_bit(PHY_INTERFACE_MODE_NA, config->supported_interfaces);
	config->mac_capabilities = ~0;
}

static const struct dsa_switch_ops dsa_loop_driver = {
	.get_tag_protocol	= dsa_loop_get_protocol,
	.setup			= dsa_loop_setup,
	.teardown		= dsa_loop_teardown,
	.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_add		= dsa_loop_port_vlan_add,
	.port_vlan_del		= dsa_loop_port_vlan_del,
	.port_change_mtu	= dsa_loop_port_change_mtu,
	.port_max_mtu		= dsa_loop_port_max_mtu,
	.phylink_get_caps	= dsa_loop_phylink_get_caps,
};

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;
	int ret;

	if (!pdata)
		return -ENODEV;

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

	ds->dev = &mdiodev->dev;
	ds->num_ports = DSA_LOOP_NUM_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);

	ret = dsa_register_switch(ds);
	if (!ret)
		dev_info(&mdiodev->dev, "%s: 0x%0x\n",
			 pdata->name, pdata->enabled_ports);

	return ret;
}

static void dsa_loop_drv_remove(struct mdio_device *mdiodev)
{
	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
	struct dsa_loop_priv *ps;

	if (!ds)
		return;

	ps = ds->priv;

	dsa_unregister_switch(ds);
	dev_put(ps->netdev);
}

static void dsa_loop_drv_shutdown(struct mdio_device *mdiodev)
{
	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);

	if (!ds)
		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");
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>
6c84a589	17	#include <linux/dsa/loop.h>
98cd1552 FF	18	#include <net/dsa.h>
	19
	20	#include "dsa_loop.h"
	21
484c0172 FF	22	static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
	23	[DSA_LOOP_PHY_READ_OK] = { "phy_read_ok", },
	24	[DSA_LOOP_PHY_READ_ERR] = { "phy_read_err", },
	25	[DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
	26	[DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
	27	};
	28
98cd1552 FF	29	static struct phy_device *phydevs[PHY_MAX_ADDR];
98cd1552 FF	30
142061eb FF	31	enum dsa_loop_devlink_resource_id {
	32	DSA_LOOP_DEVLINK_PARAM_ID_VTU,
	33	};
	34
	35	static u64 dsa_loop_devlink_vtu_get(void *priv)
	36	{
	37	struct dsa_loop_priv *ps = priv;
	38	unsigned int i, count = 0;
	39	struct dsa_loop_vlan *vl;
	40
	41	for (i = 0; i < ARRAY_SIZE(ps->vlans); i++) {
	42	vl = &ps->vlans[i];
	43	if (vl->members)
	44	count++;
	45	}
	46
	47	return count;
	48	}
	49
	50	static int dsa_loop_setup_devlink_resources(struct dsa_switch *ds)
	51	{
	52	struct devlink_resource_size_params size_params;
	53	struct dsa_loop_priv *ps = ds->priv;
	54	int err;
	55
	56	devlink_resource_size_params_init(&size_params, ARRAY_SIZE(ps->vlans),
	57	ARRAY_SIZE(ps->vlans),
	58	1, DEVLINK_RESOURCE_UNIT_ENTRY);
	59
	60	err = dsa_devlink_resource_register(ds, "VTU", ARRAY_SIZE(ps->vlans),
	61	DSA_LOOP_DEVLINK_PARAM_ID_VTU,
	62	DEVLINK_RESOURCE_ID_PARENT_TOP,
	63	&size_params);
	64	if (err)
	65	goto out;
	66
	67	dsa_devlink_resource_occ_get_register(ds,
	68	DSA_LOOP_DEVLINK_PARAM_ID_VTU,
	69	dsa_loop_devlink_vtu_get, ps);
	70
	71	return 0;
	72
	73	out:
	74	dsa_devlink_resources_unregister(ds);
	75	return err;
	76	}
	77
5ed4e3eb	78	static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds,
4d776482 FF	79	int port,
4d776482 FF	80	enum dsa_tag_protocol mp)
98cd1552	81	{
e52cde71	82	dev_dbg(ds->dev, "%s: port: %d\n", __func__, port);
98cd1552 FF	83
	84	return DSA_TAG_PROTO_NONE;
	85	}
	86
	87	static int dsa_loop_setup(struct dsa_switch *ds)
	88	{
484c0172 FF	89	struct dsa_loop_priv *ps = ds->priv;
	90	unsigned int i;
	91
	92	for (i = 0; i < ds->num_ports; i++)
	93	memcpy(ps->ports[i].mib, dsa_loop_mibs,
	94	sizeof(dsa_loop_mibs));
	95
98cd1552 FF	96	dev_dbg(ds->dev, "%s\n", __func__);
98cd1552 FF	97
142061eb FF	98	return dsa_loop_setup_devlink_resources(ds);
	99	}
	100
	101	static void dsa_loop_teardown(struct dsa_switch *ds)
	102	{
	103	dsa_devlink_resources_unregister(ds);
98cd1552 FF	104	}
98cd1552 FF	105
89f09048	106	static int dsa_loop_get_sset_count(struct dsa_switch *ds, int port, int sset)
484c0172	107	{
96cbddcd	108	if (sset != ETH_SS_STATS && sset != ETH_SS_PHY_STATS)
89f09048 FF	109	return 0;
89f09048 FF	110
484c0172 FF	111	return __DSA_LOOP_CNT_MAX;
	112	}
	113
89f09048 FF	114	static void dsa_loop_get_strings(struct dsa_switch *ds, int port,
89f09048 FF	115	u32 stringset, uint8_t *data)
484c0172 FF	116	{
	117	struct dsa_loop_priv *ps = ds->priv;
	118	unsigned int i;
	119
96cbddcd	120	if (stringset != ETH_SS_STATS && stringset != ETH_SS_PHY_STATS)
89f09048 FF	121	return;
89f09048 FF	122
484c0172 FF	123	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
	124	memcpy(data + i * ETH_GSTRING_LEN,
	125	ps->ports[port].mib[i].name, ETH_GSTRING_LEN);
	126	}
	127
	128	static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
	129	uint64_t *data)
	130	{
	131	struct dsa_loop_priv *ps = ds->priv;
	132	unsigned int i;
	133
	134	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
	135	data[i] = ps->ports[port].mib[i].val;
	136	}
	137
98cd1552 FF	138	static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)
	139	{
	140	struct dsa_loop_priv *ps = ds->priv;
	141	struct mii_bus *bus = ps->bus;
484c0172	142	int ret;
98cd1552	143
484c0172 FF	144	ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
	145	if (ret < 0)
	146	ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
	147	else
	148	ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;
	149
	150	return ret;
98cd1552 FF	151	}
	152
	153	static int dsa_loop_phy_write(struct dsa_switch *ds, int port,
	154	int regnum, u16 value)
	155	{
	156	struct dsa_loop_priv *ps = ds->priv;
	157	struct mii_bus *bus = ps->bus;
484c0172	158	int ret;
98cd1552	159
484c0172 FF	160	ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
	161	if (ret < 0)
	162	ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
	163	else
	164	ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;
	165
	166	return ret;
98cd1552 FF	167	}
	168
	169	static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port,
b079922b	170	struct dsa_bridge bridge,
06b9cce4 VO	171	bool *tx_fwd_offload,
06b9cce4 VO	172	struct netlink_ext_ack *extack)
98cd1552	173	{
e52cde71	174	dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
d3eed0e5	175	__func__, port, bridge.dev->name);
98cd1552 FF	176
	177	return 0;
	178	}
	179
	180	static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
d3eed0e5	181	struct dsa_bridge bridge)
98cd1552	182	{
e52cde71	183	dev_dbg(ds->dev, "%s: port: %d, bridge: %s\n",
d3eed0e5	184	__func__, port, bridge.dev->name);
98cd1552 FF	185	}
	186
	187	static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port,
	188	u8 state)
	189	{
e52cde71 FF	190	dev_dbg(ds->dev, "%s: port: %d, state: %d\n",
e52cde71 FF	191	__func__, port, state);
98cd1552 FF	192	}
	193
	194	static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port,
89153ed6 VO	195	bool vlan_filtering,
89153ed6 VO	196	struct netlink_ext_ack *extack)
98cd1552	197	{
e52cde71 FF	198	dev_dbg(ds->dev, "%s: port: %d, vlan_filtering: %d\n",
e52cde71 FF	199	__func__, port, vlan_filtering);
98cd1552 FF	200
	201	return 0;
	202	}
	203
1958d581	204	static int dsa_loop_port_vlan_add(struct dsa_switch *ds, int port,
31046a5f VO	205	const struct switchdev_obj_port_vlan *vlan,
31046a5f VO	206	struct netlink_ext_ack *extack)
98cd1552 FF	207	{
	208	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	209	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
	210	struct dsa_loop_priv *ps = ds->priv;
	211	struct mii_bus *bus = ps->bus;
	212	struct dsa_loop_vlan *vl;
98cd1552	213
646188c9	214	if (vlan->vid >= ARRAY_SIZE(ps->vlans))
1958d581 VO	215	return -ERANGE;
1958d581 VO	216
98cd1552 FF	217	/* Just do a sleeping operation to make lockdep checks effective */
	218	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	219
b7a9e0da	220	vl = &ps->vlans[vlan->vid];
98cd1552	221
b7a9e0da VO	222	vl->members \|= BIT(port);
	223	if (untagged)
	224	vl->untagged \|= BIT(port);
	225	else
	226	vl->untagged &= ~BIT(port);
e52cde71	227
b7a9e0da VO	228	dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
b7a9e0da VO	229	__func__, port, vlan->vid, untagged ? "un" : "", pvid);
98cd1552 FF	230
98cd1552 FF	231	if (pvid)
b7a9e0da	232	ps->ports[port].pvid = vlan->vid;
1958d581 VO	233
1958d581 VO	234	return 0;
98cd1552 FF	235	}
	236
	237	static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port,
	238	const struct switchdev_obj_port_vlan *vlan)
	239	{
	240	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	241	struct dsa_loop_priv *ps = ds->priv;
b7a9e0da	242	u16 pvid = ps->ports[port].pvid;
98cd1552 FF	243	struct mii_bus *bus = ps->bus;
98cd1552 FF	244	struct dsa_loop_vlan *vl;
98cd1552	245
98cd1552 FF	246	/* Just do a sleeping operation to make lockdep checks effective */
	247	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	248
b7a9e0da	249	vl = &ps->vlans[vlan->vid];
98cd1552	250
b7a9e0da VO	251	vl->members &= ~BIT(port);
	252	if (untagged)
	253	vl->untagged &= ~BIT(port);
98cd1552	254
b7a9e0da VO	255	if (pvid == vlan->vid)
b7a9e0da VO	256	pvid = 1;
e52cde71	257
b7a9e0da VO	258	dev_dbg(ds->dev, "%s: port: %d vlan: %d, %stagged, pvid: %d\n",
b7a9e0da VO	259	__func__, port, vlan->vid, untagged ? "un" : "", pvid);
81d4e8e0	260	ps->ports[port].pvid = pvid;
98cd1552 FF	261
	262	return 0;
	263	}
	264
c99194ed FF	265	static int dsa_loop_port_change_mtu(struct dsa_switch *ds, int port,
	266	int new_mtu)
	267	{
	268	struct dsa_loop_priv *priv = ds->priv;
	269
	270	priv->ports[port].mtu = new_mtu;
	271
	272	return 0;
	273	}
	274
	275	static int dsa_loop_port_max_mtu(struct dsa_switch *ds, int port)
	276	{
	277	return ETH_MAX_MTU;
	278	}
	279
db2c6d5f RKO	280	static void dsa_loop_phylink_get_caps(struct dsa_switch *dsa, int port,
	281	struct phylink_config *config)
	282	{
	283	bitmap_fill(config->supported_interfaces, PHY_INTERFACE_MODE_MAX);
	284	__clear_bit(PHY_INTERFACE_MODE_NA, config->supported_interfaces);
	285	config->mac_capabilities = ~0;
	286	}
	287
d78d6776	288	static const struct dsa_switch_ops dsa_loop_driver = {
98cd1552 FF	289	.get_tag_protocol = dsa_loop_get_protocol,
98cd1552 FF	290	.setup = dsa_loop_setup,
142061eb	291	.teardown = dsa_loop_teardown,
484c0172 FF	292	.get_strings = dsa_loop_get_strings,
	293	.get_ethtool_stats = dsa_loop_get_ethtool_stats,
	294	.get_sset_count = dsa_loop_get_sset_count,
96cbddcd	295	.get_ethtool_phy_stats = dsa_loop_get_ethtool_stats,
98cd1552 FF	296	.phy_read = dsa_loop_phy_read,
	297	.phy_write = dsa_loop_phy_write,
	298	.port_bridge_join = dsa_loop_port_bridge_join,
	299	.port_bridge_leave = dsa_loop_port_bridge_leave,
	300	.port_stp_state_set = dsa_loop_port_stp_state_set,
	301	.port_vlan_filtering = dsa_loop_port_vlan_filtering,
98cd1552 FF	302	.port_vlan_add = dsa_loop_port_vlan_add,
98cd1552 FF	303	.port_vlan_del = dsa_loop_port_vlan_del,
c99194ed FF	304	.port_change_mtu = dsa_loop_port_change_mtu,
c99194ed FF	305	.port_max_mtu = dsa_loop_port_max_mtu,
db2c6d5f	306	.phylink_get_caps = dsa_loop_phylink_get_caps,
98cd1552 FF	307	};
	308
	309	static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
	310	{
	311	struct dsa_loop_pdata *pdata = mdiodev->dev.platform_data;
	312	struct dsa_loop_priv *ps;
	313	struct dsa_switch *ds;
93165ecb	314	int ret;
98cd1552 FF	315
	316	if (!pdata)
	317	return -ENODEV;
	318
7e99e347	319	ds = devm_kzalloc(&mdiodev->dev, sizeof(*ds), GFP_KERNEL);
98cd1552 FF	320	if (!ds)
	321	return -ENOMEM;
	322
7e99e347	323	ds->dev = &mdiodev->dev;
947b6ef9	324	ds->num_ports = DSA_LOOP_NUM_PORTS;
7e99e347	325
98cd1552	326	ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
8ce7aaaa CJ	327	if (!ps)
	328	return -ENOMEM;
	329
98cd1552 FF	330	ps->netdev = dev_get_by_name(&init_net, pdata->netdev);
	331	if (!ps->netdev)
	332	return -EPROBE_DEFER;
	333
	334	pdata->cd.netdev[DSA_LOOP_CPU_PORT] = &ps->netdev->dev;
	335
	336	ds->dev = &mdiodev->dev;
	337	ds->ops = &dsa_loop_driver;
	338	ds->priv = ps;
	339	ps->bus = mdiodev->bus;
	340
	341	dev_set_drvdata(&mdiodev->dev, ds);
	342
93165ecb FF	343	ret = dsa_register_switch(ds);
	344	if (!ret)
	345	dev_info(&mdiodev->dev, "%s: 0x%0x\n",
	346	pdata->name, pdata->enabled_ports);
	347
	348	return ret;
98cd1552 FF	349	}
	350
	351	static void dsa_loop_drv_remove(struct mdio_device *mdiodev)
	352	{
	353	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
0650bf52 VO	354	struct dsa_loop_priv *ps;
	355
	356	if (!ds)
	357	return;
	358
	359	ps = ds->priv;
98cd1552 FF	360
	361	dsa_unregister_switch(ds);
	362	dev_put(ps->netdev);
0650bf52 VO	363	}
	364
	365	static void dsa_loop_drv_shutdown(struct mdio_device *mdiodev)
	366	{
	367	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
	368
	369	if (!ds)
	370	return;
	371
	372	dsa_switch_shutdown(ds);
	373
	374	dev_set_drvdata(&mdiodev->dev, NULL);
98cd1552 FF	375	}
	376
	377	static struct mdio_driver dsa_loop_drv = {
	378	.mdiodrv.driver = {
	379	.name = "dsa-loop",
	380	},
	381	.probe = dsa_loop_drv_probe,
	382	.remove = dsa_loop_drv_remove,
0650bf52	383	.shutdown = dsa_loop_drv_shutdown,
98cd1552 FF	384	};
	385
	386	#define NUM_FIXED_PHYS (DSA_LOOP_NUM_PORTS - 2)
	387
633efc8b CZ	388	static void dsa_loop_phydevs_unregister(void)
	389	{
	390	unsigned int i;
	391
	392	for (i = 0; i < NUM_FIXED_PHYS; i++)
	393	if (!IS_ERR(phydevs[i])) {
	394	fixed_phy_unregister(phydevs[i]);
	395	phy_device_free(phydevs[i]);
	396	}
	397	}
	398
98cd1552 FF	399	static int __init dsa_loop_init(void)
	400	{
	401	struct fixed_phy_status status = {
	402	.link = 1,
	403	.speed = SPEED_100,
	404	.duplex = DUPLEX_FULL,
	405	};
633efc8b	406	unsigned int i, ret;
98cd1552 FF	407
98cd1552 FF	408	for (i = 0; i < NUM_FIXED_PHYS; i++)
5468e82f	409	phydevs[i] = fixed_phy_register(PHY_POLL, &status, NULL);
98cd1552	410
633efc8b CZ	411	ret = mdio_driver_register(&dsa_loop_drv);
	412	if (ret)
	413	dsa_loop_phydevs_unregister();
	414
	415	return ret;
98cd1552 FF	416	}
	417	module_init(dsa_loop_init);
	418
	419	static void __exit dsa_loop_exit(void)
	420	{
	421	mdio_driver_unregister(&dsa_loop_drv);
633efc8b	422	dsa_loop_phydevs_unregister();
98cd1552 FF	423	}
	424	module_exit(dsa_loop_exit);
	425
3047211c	426	MODULE_SOFTDEP("pre: dsa_loop_bdinfo");
98cd1552 FF	427	MODULE_LICENSE("GPL");
	428	MODULE_AUTHOR("Florian Fainelli");
	429	MODULE_DESCRIPTION("DSA loopback driver");