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

/*
 * Handling of a single switch port
 *
 * Copyright (c) 2017 Savoir-faire Linux Inc.
 *	Vivien Didelot <vivien.didelot@savoirfairelinux.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/if_bridge.h>
#include <linux/notifier.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>

#include "dsa_priv.h"

static int dsa_port_notify(const struct dsa_port *dp, unsigned long e, void *v)
{
	struct raw_notifier_head *nh = &dp->ds->dst->nh;
	int err;

	err = raw_notifier_call_chain(nh, e, v);

	return notifier_to_errno(err);
}

int dsa_port_set_state(struct dsa_port *dp, u8 state,
		       struct switchdev_trans *trans)
{
	struct dsa_switch *ds = dp->ds;
	int port = dp->index;

	if (switchdev_trans_ph_prepare(trans))
		return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;

	if (ds->ops->port_stp_state_set)
		ds->ops->port_stp_state_set(ds, port, state);

	if (ds->ops->port_fast_age) {
		/* Fast age FDB entries or flush appropriate forwarding database
		 * for the given port, if we are moving it from Learning or
		 * Forwarding state, to Disabled or Blocking or Listening state.
		 */

		if ((dp->stp_state == BR_STATE_LEARNING ||
		     dp->stp_state == BR_STATE_FORWARDING) &&
		    (state == BR_STATE_DISABLED ||
		     state == BR_STATE_BLOCKING ||
		     state == BR_STATE_LISTENING))
			ds->ops->port_fast_age(ds, port);
	}

	dp->stp_state = state;

	return 0;
}

static void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
{
	int err;

	err = dsa_port_set_state(dp, state, NULL);
	if (err)
		pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
}

int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy)
{
	struct dsa_switch *ds = dp->ds;
	int port = dp->index;
	int err;

	if (ds->ops->port_enable) {
		err = ds->ops->port_enable(ds, port, phy);
		if (err)
			return err;
	}

	if (!dp->bridge_dev)
		dsa_port_set_state_now(dp, BR_STATE_FORWARDING);

	return 0;
}

void dsa_port_disable(struct dsa_port *dp, struct phy_device *phy)
{
	struct dsa_switch *ds = dp->ds;
	int port = dp->index;

	if (!dp->bridge_dev)
		dsa_port_set_state_now(dp, BR_STATE_DISABLED);

	if (ds->ops->port_disable)
		ds->ops->port_disable(ds, port, phy);
}

int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br)
{
	struct dsa_notifier_bridge_info info = {
		.sw_index = dp->ds->index,
		.port = dp->index,
		.br = br,
	};
	int err;

	/* Here the port is already bridged. Reflect the current configuration
	 * so that drivers can program their chips accordingly.
	 */
	dp->bridge_dev = br;

	err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info);

	/* The bridging is rolled back on error */
	if (err)
		dp->bridge_dev = NULL;

	return err;
}

void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
{
	struct dsa_notifier_bridge_info info = {
		.sw_index = dp->ds->index,
		.port = dp->index,
		.br = br,
	};
	int err;

	/* Here the port is already unbridged. Reflect the current configuration
	 * so that drivers can program their chips accordingly.
	 */
	dp->bridge_dev = NULL;

	err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info);
	if (err)
		pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");

	/* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
	 * so allow it to be in BR_STATE_FORWARDING to be kept functional
	 */
	dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
}

int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
			    struct switchdev_trans *trans)
{
	struct dsa_switch *ds = dp->ds;

	/* bridge skips -EOPNOTSUPP, so skip the prepare phase */
	if (switchdev_trans_ph_prepare(trans))
		return 0;

	if (ds->ops->port_vlan_filtering)
		return ds->ops->port_vlan_filtering(ds, dp->index,
						    vlan_filtering);

	return 0;
}

int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
			 struct switchdev_trans *trans)
{
	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
	unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
	struct dsa_notifier_ageing_time_info info = {
		.ageing_time = ageing_time,
		.trans = trans,
	};

	if (switchdev_trans_ph_prepare(trans))
		return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);

	dp->ageing_time = ageing_time;

	return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
}

int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
		     u16 vid)
{
	struct dsa_notifier_fdb_info info = {
		.sw_index = dp->ds->index,
		.port = dp->index,
		.addr = addr,
		.vid = vid,
	};

	return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
}

int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
		     u16 vid)
{
	struct dsa_notifier_fdb_info info = {
		.sw_index = dp->ds->index,
		.port = dp->index,
		.addr = addr,
		.vid = vid,

	};

	return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
}

int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data)
{
	struct dsa_switch *ds = dp->ds;
	int port = dp->index;

	if (!ds->ops->port_fdb_dump)
		return -EOPNOTSUPP;

	return ds->ops->port_fdb_dump(ds, port, cb, data);
}

int dsa_port_mdb_add(const struct dsa_port *dp,
		     const struct switchdev_obj_port_mdb *mdb,
		     struct switchdev_trans *trans)
{
	struct dsa_notifier_mdb_info info = {
		.sw_index = dp->ds->index,
		.port = dp->index,
		.trans = trans,
		.mdb = mdb,
	};

	return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
}

int dsa_port_mdb_del(const struct dsa_port *dp,
		     const struct switchdev_obj_port_mdb *mdb)
{
	struct dsa_notifier_mdb_info info = {
		.sw_index = dp->ds->index,
		.port = dp->index,
		.mdb = mdb,
	};

	return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
}

int dsa_port_vlan_add(struct dsa_port *dp,
		      const struct switchdev_obj_port_vlan *vlan,
		      struct switchdev_trans *trans)
{
	struct dsa_notifier_vlan_info info = {
		.sw_index = dp->ds->index,
		.port = dp->index,
		.trans = trans,
		.vlan = vlan,
	};

	if (br_vlan_enabled(dp->bridge_dev))
		return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);

	return 0;
}

int dsa_port_vlan_del(struct dsa_port *dp,
		      const struct switchdev_obj_port_vlan *vlan)
{
	struct dsa_notifier_vlan_info info = {
		.sw_index = dp->ds->index,
		.port = dp->index,
		.vlan = vlan,
	};

	if (br_vlan_enabled(dp->bridge_dev))
		return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);

	return 0;
}

int dsa_port_fixed_link_register_of(struct dsa_port *dp)
{
	struct device_node *dn = dp->dn;
	struct dsa_switch *ds = dp->ds;
	struct phy_device *phydev;
	int port = dp->index;
	int mode;
	int err;

	if (of_phy_is_fixed_link(dn)) {
		err = of_phy_register_fixed_link(dn);
		if (err) {
			dev_err(ds->dev,
				"failed to register the fixed PHY of port %d\n",
				port);
			return err;
		}

		phydev = of_phy_find_device(dn);

		mode = of_get_phy_mode(dn);
		if (mode < 0)
			mode = PHY_INTERFACE_MODE_NA;
		phydev->interface = mode;

		genphy_config_init(phydev);
		genphy_read_status(phydev);

		if (ds->ops->adjust_link)
			ds->ops->adjust_link(ds, port, phydev);

		put_device(&phydev->mdio.dev);
	}

	return 0;
}

void dsa_port_fixed_link_unregister_of(struct dsa_port *dp)
{
	struct device_node *dn = dp->dn;

	if (of_phy_is_fixed_link(dn))
		of_phy_deregister_fixed_link(dn);
}
Commit	Line	Data
a40c175b VD	1	/*
	2	* Handling of a single switch port
	3	*
	4	* Copyright (c) 2017 Savoir-faire Linux Inc.
	5	* Vivien Didelot <vivien.didelot@savoirfairelinux.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*/
	12
	13	#include <linux/if_bridge.h>
cfbed329	14	#include <linux/notifier.h>
57ab1ca2 VD	15	#include <linux/of_mdio.h>
57ab1ca2 VD	16	#include <linux/of_net.h>
a40c175b VD	17
	18	#include "dsa_priv.h"
	19
bb9f6031	20	static int dsa_port_notify(const struct dsa_port dp, unsigned long e, void v)
cfbed329 VD	21	{
	22	struct raw_notifier_head *nh = &dp->ds->dst->nh;
	23	int err;
	24
	25	err = raw_notifier_call_chain(nh, e, v);
	26
	27	return notifier_to_errno(err);
	28	}
	29
a40c175b VD	30	int dsa_port_set_state(struct dsa_port *dp, u8 state,
	31	struct switchdev_trans *trans)
	32	{
	33	struct dsa_switch *ds = dp->ds;
	34	int port = dp->index;
	35
	36	if (switchdev_trans_ph_prepare(trans))
	37	return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
	38
	39	if (ds->ops->port_stp_state_set)
	40	ds->ops->port_stp_state_set(ds, port, state);
	41
	42	if (ds->ops->port_fast_age) {
	43	/* Fast age FDB entries or flush appropriate forwarding database
	44	* for the given port, if we are moving it from Learning or
	45	* Forwarding state, to Disabled or Blocking or Listening state.
	46	*/
	47
	48	if ((dp->stp_state == BR_STATE_LEARNING \|\|
	49	dp->stp_state == BR_STATE_FORWARDING) &&
	50	(state == BR_STATE_DISABLED \|\|
	51	state == BR_STATE_BLOCKING \|\|
	52	state == BR_STATE_LISTENING))
	53	ds->ops->port_fast_age(ds, port);
	54	}
	55
	56	dp->stp_state = state;
	57
	58	return 0;
	59	}
	60
fb8a6a2b	61	static void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
a40c175b VD	62	{
	63	int err;
	64
	65	err = dsa_port_set_state(dp, state, NULL);
	66	if (err)
	67	pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
	68	}
cfbed329	69
fb8a6a2b VD	70	int dsa_port_enable(struct dsa_port dp, struct phy_device phy)
fb8a6a2b VD	71	{
fb8a6a2b VD	72	struct dsa_switch *ds = dp->ds;
	73	int port = dp->index;
	74	int err;
	75
	76	if (ds->ops->port_enable) {
	77	err = ds->ops->port_enable(ds, port, phy);
	78	if (err)
	79	return err;
	80	}
	81
a9c2e654 RK	82	if (!dp->bridge_dev)
a9c2e654 RK	83	dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
fb8a6a2b VD	84
	85	return 0;
	86	}
	87
	88	void dsa_port_disable(struct dsa_port dp, struct phy_device phy)
	89	{
	90	struct dsa_switch *ds = dp->ds;
	91	int port = dp->index;
	92
a9c2e654 RK	93	if (!dp->bridge_dev)
a9c2e654 RK	94	dsa_port_set_state_now(dp, BR_STATE_DISABLED);
fb8a6a2b VD	95
	96	if (ds->ops->port_disable)
	97	ds->ops->port_disable(ds, port, phy);
	98	}
	99
cfbed329 VD	100	int dsa_port_bridge_join(struct dsa_port dp, struct net_device br)
	101	{
	102	struct dsa_notifier_bridge_info info = {
	103	.sw_index = dp->ds->index,
	104	.port = dp->index,
	105	.br = br,
	106	};
	107	int err;
	108
	109	/* Here the port is already bridged. Reflect the current configuration
	110	* so that drivers can program their chips accordingly.
	111	*/
	112	dp->bridge_dev = br;
	113
	114	err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info);
	115
	116	/* The bridging is rolled back on error */
	117	if (err)
	118	dp->bridge_dev = NULL;
	119
	120	return err;
	121	}
	122
	123	void dsa_port_bridge_leave(struct dsa_port dp, struct net_device br)
	124	{
	125	struct dsa_notifier_bridge_info info = {
	126	.sw_index = dp->ds->index,
	127	.port = dp->index,
	128	.br = br,
	129	};
	130	int err;
	131
	132	/* Here the port is already unbridged. Reflect the current configuration
	133	* so that drivers can program their chips accordingly.
	134	*/
	135	dp->bridge_dev = NULL;
	136
	137	err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info);
	138	if (err)
	139	pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
	140
	141	/* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
	142	* so allow it to be in BR_STATE_FORWARDING to be kept functional
	143	*/
	144	dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
	145	}
4d61d304 VD	146
	147	int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
	148	struct switchdev_trans *trans)
	149	{
	150	struct dsa_switch *ds = dp->ds;
	151
	152	/* bridge skips -EOPNOTSUPP, so skip the prepare phase */
	153	if (switchdev_trans_ph_prepare(trans))
	154	return 0;
	155
	156	if (ds->ops->port_vlan_filtering)
	157	return ds->ops->port_vlan_filtering(ds, dp->index,
	158	vlan_filtering);
	159
	160	return 0;
	161	}
d87bd94e	162
d87bd94e VD	163	int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
	164	struct switchdev_trans *trans)
	165	{
	166	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
	167	unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
1faabf74 VD	168	struct dsa_notifier_ageing_time_info info = {
1faabf74 VD	169	.ageing_time = ageing_time,
1faabf74 VD	170	.trans = trans,
1faabf74 VD	171	};
d87bd94e	172
1faabf74 VD	173	if (switchdev_trans_ph_prepare(trans))
1faabf74 VD	174	return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
d87bd94e	175
d87bd94e	176	dp->ageing_time = ageing_time;
d87bd94e	177
1faabf74	178	return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
d87bd94e	179	}
d1cffff0	180
2acf4e6a AS	181	int dsa_port_fdb_add(struct dsa_port dp, const unsigned char addr,
2acf4e6a AS	182	u16 vid)
d1cffff0	183	{
685fb6a4 VD	184	struct dsa_notifier_fdb_info info = {
	185	.sw_index = dp->ds->index,
	186	.port = dp->index,
2acf4e6a AS	187	.addr = addr,
2acf4e6a AS	188	.vid = vid,
685fb6a4	189	};
d1cffff0	190
685fb6a4	191	return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
d1cffff0 VD	192	}
d1cffff0 VD	193
2acf4e6a AS	194	int dsa_port_fdb_del(struct dsa_port dp, const unsigned char addr,
2acf4e6a AS	195	u16 vid)
d1cffff0	196	{
685fb6a4 VD	197	struct dsa_notifier_fdb_info info = {
	198	.sw_index = dp->ds->index,
	199	.port = dp->index,
2acf4e6a AS	200	.addr = addr,
	201	.vid = vid,
	202
685fb6a4	203	};
d1cffff0	204
685fb6a4	205	return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
d1cffff0 VD	206	}
d1cffff0 VD	207
de40fc5d VD	208	int dsa_port_fdb_dump(struct dsa_port dp, dsa_fdb_dump_cb_t cb, void *data)
	209	{
	210	struct dsa_switch *ds = dp->ds;
	211	int port = dp->index;
	212
	213	if (!ds->ops->port_fdb_dump)
	214	return -EOPNOTSUPP;
	215
	216	return ds->ops->port_fdb_dump(ds, port, cb, data);
	217	}
	218
bb9f6031	219	int dsa_port_mdb_add(const struct dsa_port *dp,
3a9afea3 VD	220	const struct switchdev_obj_port_mdb *mdb,
	221	struct switchdev_trans *trans)
	222	{
8ae5bcdc VD	223	struct dsa_notifier_mdb_info info = {
	224	.sw_index = dp->ds->index,
	225	.port = dp->index,
	226	.trans = trans,
	227	.mdb = mdb,
	228	};
3a9afea3	229
8ae5bcdc	230	return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
3a9afea3 VD	231	}
3a9afea3 VD	232
bb9f6031	233	int dsa_port_mdb_del(const struct dsa_port *dp,
3a9afea3 VD	234	const struct switchdev_obj_port_mdb *mdb)
3a9afea3 VD	235	{
8ae5bcdc VD	236	struct dsa_notifier_mdb_info info = {
	237	.sw_index = dp->ds->index,
	238	.port = dp->index,
	239	.mdb = mdb,
	240	};
3a9afea3	241
8ae5bcdc	242	return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
3a9afea3 VD	243	}
3a9afea3 VD	244
076e7133 VD	245	int dsa_port_vlan_add(struct dsa_port *dp,
	246	const struct switchdev_obj_port_vlan *vlan,
	247	struct switchdev_trans *trans)
	248	{
d0c627b8 VD	249	struct dsa_notifier_vlan_info info = {
	250	.sw_index = dp->ds->index,
	251	.port = dp->index,
	252	.trans = trans,
	253	.vlan = vlan,
	254	};
076e7133	255
2ea7a679 AL	256	if (br_vlan_enabled(dp->bridge_dev))
	257	return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
	258
	259	return 0;
076e7133 VD	260	}
	261
	262	int dsa_port_vlan_del(struct dsa_port *dp,
	263	const struct switchdev_obj_port_vlan *vlan)
	264	{
d0c627b8 VD	265	struct dsa_notifier_vlan_info info = {
	266	.sw_index = dp->ds->index,
	267	.port = dp->index,
	268	.vlan = vlan,
	269	};
076e7133	270
2ea7a679 AL	271	if (br_vlan_enabled(dp->bridge_dev))
	272	return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
	273
	274	return 0;
076e7133	275	}
57ab1ca2 VD	276
	277	int dsa_port_fixed_link_register_of(struct dsa_port *dp)
	278	{
	279	struct device_node *dn = dp->dn;
	280	struct dsa_switch *ds = dp->ds;
	281	struct phy_device *phydev;
	282	int port = dp->index;
	283	int mode;
	284	int err;
	285
	286	if (of_phy_is_fixed_link(dn)) {
	287	err = of_phy_register_fixed_link(dn);
	288	if (err) {
	289	dev_err(ds->dev,
	290	"failed to register the fixed PHY of port %d\n",
	291	port);
	292	return err;
	293	}
	294
	295	phydev = of_phy_find_device(dn);
	296
	297	mode = of_get_phy_mode(dn);
	298	if (mode < 0)
	299	mode = PHY_INTERFACE_MODE_NA;
	300	phydev->interface = mode;
	301
	302	genphy_config_init(phydev);
	303	genphy_read_status(phydev);
	304
	305	if (ds->ops->adjust_link)
	306	ds->ops->adjust_link(ds, port, phydev);
	307
	308	put_device(&phydev->mdio.dev);
	309	}
	310
	311	return 0;
	312	}
	313
	314	void dsa_port_fixed_link_unregister_of(struct dsa_port *dp)
	315	{
	316	struct device_node *dn = dp->dn;
	317
	318	if (of_phy_is_fixed_link(dn))
	319	of_phy_deregister_fixed_link(dn);
	320	}