[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)
{
	u8 stp_state = dp->bridge_dev ? BR_STATE_BLOCKING : BR_STATE_FORWARDING;
	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;
	}

	dsa_port_set_state_now(dp, stp_state);

	return 0;
}

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

	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)
	71	{
	72	u8 stp_state = dp->bridge_dev ? BR_STATE_BLOCKING : BR_STATE_FORWARDING;
	73	struct dsa_switch *ds = dp->ds;
	74	int port = dp->index;
	75	int err;
	76
	77	if (ds->ops->port_enable) {
	78	err = ds->ops->port_enable(ds, port, phy);
	79	if (err)
	80	return err;
	81	}
	82
	83	dsa_port_set_state_now(dp, stp_state);
	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
	93	dsa_port_set_state_now(dp, BR_STATE_DISABLED);
	94
	95	if (ds->ops->port_disable)
	96	ds->ops->port_disable(ds, port, phy);
	97	}
	98
cfbed329 VD	99	int dsa_port_bridge_join(struct dsa_port dp, struct net_device br)
	100	{
	101	struct dsa_notifier_bridge_info info = {
	102	.sw_index = dp->ds->index,
	103	.port = dp->index,
	104	.br = br,
	105	};
	106	int err;
	107
	108	/* Here the port is already bridged. Reflect the current configuration
	109	* so that drivers can program their chips accordingly.
	110	*/
	111	dp->bridge_dev = br;
	112
	113	err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info);
	114
	115	/* The bridging is rolled back on error */
	116	if (err)
	117	dp->bridge_dev = NULL;
	118
	119	return err;
	120	}
	121
	122	void dsa_port_bridge_leave(struct dsa_port dp, struct net_device br)
	123	{
	124	struct dsa_notifier_bridge_info info = {
	125	.sw_index = dp->ds->index,
	126	.port = dp->index,
	127	.br = br,
	128	};
	129	int err;
	130
	131	/* Here the port is already unbridged. Reflect the current configuration
	132	* so that drivers can program their chips accordingly.
	133	*/
	134	dp->bridge_dev = NULL;
	135
	136	err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info);
	137	if (err)
	138	pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
	139
	140	/* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
	141	* so allow it to be in BR_STATE_FORWARDING to be kept functional
	142	*/
	143	dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
	144	}
4d61d304 VD	145
	146	int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
	147	struct switchdev_trans *trans)
	148	{
	149	struct dsa_switch *ds = dp->ds;
	150
	151	/* bridge skips -EOPNOTSUPP, so skip the prepare phase */
	152	if (switchdev_trans_ph_prepare(trans))
	153	return 0;
	154
	155	if (ds->ops->port_vlan_filtering)
	156	return ds->ops->port_vlan_filtering(ds, dp->index,
	157	vlan_filtering);
	158
	159	return 0;
	160	}
d87bd94e	161
d87bd94e VD	162	int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
	163	struct switchdev_trans *trans)
	164	{
	165	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
	166	unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
1faabf74 VD	167	struct dsa_notifier_ageing_time_info info = {
1faabf74 VD	168	.ageing_time = ageing_time,
1faabf74 VD	169	.trans = trans,
1faabf74 VD	170	};
d87bd94e	171
1faabf74 VD	172	if (switchdev_trans_ph_prepare(trans))
1faabf74 VD	173	return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
d87bd94e	174
d87bd94e	175	dp->ageing_time = ageing_time;
d87bd94e	176
1faabf74	177	return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
d87bd94e	178	}
d1cffff0	179
2acf4e6a AS	180	int dsa_port_fdb_add(struct dsa_port dp, const unsigned char addr,
2acf4e6a AS	181	u16 vid)
d1cffff0	182	{
685fb6a4 VD	183	struct dsa_notifier_fdb_info info = {
	184	.sw_index = dp->ds->index,
	185	.port = dp->index,
2acf4e6a AS	186	.addr = addr,
2acf4e6a AS	187	.vid = vid,
685fb6a4	188	};
d1cffff0	189
685fb6a4	190	return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
d1cffff0 VD	191	}
d1cffff0 VD	192
2acf4e6a AS	193	int dsa_port_fdb_del(struct dsa_port dp, const unsigned char addr,
2acf4e6a AS	194	u16 vid)
d1cffff0	195	{
685fb6a4 VD	196	struct dsa_notifier_fdb_info info = {
	197	.sw_index = dp->ds->index,
	198	.port = dp->index,
2acf4e6a AS	199	.addr = addr,
	200	.vid = vid,
	201
685fb6a4	202	};
d1cffff0	203
685fb6a4	204	return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
d1cffff0 VD	205	}
d1cffff0 VD	206
de40fc5d VD	207	int dsa_port_fdb_dump(struct dsa_port dp, dsa_fdb_dump_cb_t cb, void *data)
	208	{
	209	struct dsa_switch *ds = dp->ds;
	210	int port = dp->index;
	211
	212	if (!ds->ops->port_fdb_dump)
	213	return -EOPNOTSUPP;
	214
	215	return ds->ops->port_fdb_dump(ds, port, cb, data);
	216	}
	217
bb9f6031	218	int dsa_port_mdb_add(const struct dsa_port *dp,
3a9afea3 VD	219	const struct switchdev_obj_port_mdb *mdb,
	220	struct switchdev_trans *trans)
	221	{
8ae5bcdc VD	222	struct dsa_notifier_mdb_info info = {
	223	.sw_index = dp->ds->index,
	224	.port = dp->index,
	225	.trans = trans,
	226	.mdb = mdb,
	227	};
3a9afea3	228
8ae5bcdc	229	return dsa_port_notify(dp, DSA_NOTIFIER_MDB_ADD, &info);
3a9afea3 VD	230	}
3a9afea3 VD	231
bb9f6031	232	int dsa_port_mdb_del(const struct dsa_port *dp,
3a9afea3 VD	233	const struct switchdev_obj_port_mdb *mdb)
3a9afea3 VD	234	{
8ae5bcdc VD	235	struct dsa_notifier_mdb_info info = {
	236	.sw_index = dp->ds->index,
	237	.port = dp->index,
	238	.mdb = mdb,
	239	};
3a9afea3	240
8ae5bcdc	241	return dsa_port_notify(dp, DSA_NOTIFIER_MDB_DEL, &info);
3a9afea3 VD	242	}
3a9afea3 VD	243
076e7133 VD	244	int dsa_port_vlan_add(struct dsa_port *dp,
	245	const struct switchdev_obj_port_vlan *vlan,
	246	struct switchdev_trans *trans)
	247	{
d0c627b8 VD	248	struct dsa_notifier_vlan_info info = {
	249	.sw_index = dp->ds->index,
	250	.port = dp->index,
	251	.trans = trans,
	252	.vlan = vlan,
	253	};
076e7133	254
2ea7a679 AL	255	if (br_vlan_enabled(dp->bridge_dev))
	256	return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_ADD, &info);
	257
	258	return 0;
076e7133 VD	259	}
	260
	261	int dsa_port_vlan_del(struct dsa_port *dp,
	262	const struct switchdev_obj_port_vlan *vlan)
	263	{
d0c627b8 VD	264	struct dsa_notifier_vlan_info info = {
	265	.sw_index = dp->ds->index,
	266	.port = dp->index,
	267	.vlan = vlan,
	268	};
076e7133	269
2ea7a679 AL	270	if (br_vlan_enabled(dp->bridge_dev))
	271	return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info);
	272
	273	return 0;
076e7133	274	}
57ab1ca2 VD	275
	276	int dsa_port_fixed_link_register_of(struct dsa_port *dp)
	277	{
	278	struct device_node *dn = dp->dn;
	279	struct dsa_switch *ds = dp->ds;
	280	struct phy_device *phydev;
	281	int port = dp->index;
	282	int mode;
	283	int err;
	284
	285	if (of_phy_is_fixed_link(dn)) {
	286	err = of_phy_register_fixed_link(dn);
	287	if (err) {
	288	dev_err(ds->dev,
	289	"failed to register the fixed PHY of port %d\n",
	290	port);
	291	return err;
	292	}
	293
	294	phydev = of_phy_find_device(dn);
	295
	296	mode = of_get_phy_mode(dn);
	297	if (mode < 0)
	298	mode = PHY_INTERFACE_MODE_NA;
	299	phydev->interface = mode;
	300
	301	genphy_config_init(phydev);
	302	genphy_read_status(phydev);
	303
	304	if (ds->ops->adjust_link)
	305	ds->ops->adjust_link(ds, port, phydev);
	306
	307	put_device(&phydev->mdio.dev);
	308	}
	309
	310	return 0;
	311	}
	312
	313	void dsa_port_fixed_link_unregister_of(struct dsa_port *dp)
	314	{
	315	struct device_node *dn = dp->dn;
	316
	317	if (of_phy_is_fixed_link(dn))
	318	of_phy_deregister_fixed_link(dn);
	319	}