[mirror_ubuntu-hirsute-kernel.git] / net / ethtool / linkmodes.c

// SPDX-License-Identifier: GPL-2.0-only

#include "netlink.h"
#include "common.h"
#include "bitset.h"

struct linkmodes_req_info {
	struct ethnl_req_info		base;
};

struct linkmodes_reply_data {
	struct ethnl_reply_data		base;
	struct ethtool_link_ksettings	ksettings;
	struct ethtool_link_settings	*lsettings;
	bool				peer_empty;
};

#define LINKMODES_REPDATA(__reply_base) \
	container_of(__reply_base, struct linkmodes_reply_data, base)

static const struct nla_policy
linkmodes_get_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
	[ETHTOOL_A_LINKMODES_UNSPEC]		= { .type = NLA_REJECT },
	[ETHTOOL_A_LINKMODES_HEADER]		= { .type = NLA_NESTED },
	[ETHTOOL_A_LINKMODES_AUTONEG]		= { .type = NLA_REJECT },
	[ETHTOOL_A_LINKMODES_OURS]		= { .type = NLA_REJECT },
	[ETHTOOL_A_LINKMODES_PEER]		= { .type = NLA_REJECT },
	[ETHTOOL_A_LINKMODES_SPEED]		= { .type = NLA_REJECT },
	[ETHTOOL_A_LINKMODES_DUPLEX]		= { .type = NLA_REJECT },
};

static int linkmodes_prepare_data(const struct ethnl_req_info *req_base,
				  struct ethnl_reply_data *reply_base,
				  struct genl_info *info)
{
	struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
	struct net_device *dev = reply_base->dev;
	int ret;

	data->lsettings = &data->ksettings.base;

	ret = ethnl_ops_begin(dev);
	if (ret < 0)
		return ret;

	ret = __ethtool_get_link_ksettings(dev, &data->ksettings);
	if (ret < 0 && info) {
		GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
		goto out;
	}

	data->peer_empty =
		bitmap_empty(data->ksettings.link_modes.lp_advertising,
			     __ETHTOOL_LINK_MODE_MASK_NBITS);

out:
	ethnl_ops_complete(dev);
	return ret;
}

static int linkmodes_reply_size(const struct ethnl_req_info *req_base,
				const struct ethnl_reply_data *reply_base)
{
	const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
	const struct ethtool_link_ksettings *ksettings = &data->ksettings;
	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
	int len, ret;

	len = nla_total_size(sizeof(u8)) /* LINKMODES_AUTONEG */
		+ nla_total_size(sizeof(u32)) /* LINKMODES_SPEED */
		+ nla_total_size(sizeof(u8)) /* LINKMODES_DUPLEX */
		+ 0;
	ret = ethnl_bitset_size(ksettings->link_modes.advertising,
				ksettings->link_modes.supported,
				__ETHTOOL_LINK_MODE_MASK_NBITS,
				link_mode_names, compact);
	if (ret < 0)
		return ret;
	len += ret;
	if (!data->peer_empty) {
		ret = ethnl_bitset_size(ksettings->link_modes.lp_advertising,
					NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
					link_mode_names, compact);
		if (ret < 0)
			return ret;
		len += ret;
	}

	return len;
}

static int linkmodes_fill_reply(struct sk_buff *skb,
				const struct ethnl_req_info *req_base,
				const struct ethnl_reply_data *reply_base)
{
	const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
	const struct ethtool_link_ksettings *ksettings = &data->ksettings;
	const struct ethtool_link_settings *lsettings = &ksettings->base;
	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
	int ret;

	if (nla_put_u8(skb, ETHTOOL_A_LINKMODES_AUTONEG, lsettings->autoneg))
		return -EMSGSIZE;

	ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_OURS,
			       ksettings->link_modes.advertising,
			       ksettings->link_modes.supported,
			       __ETHTOOL_LINK_MODE_MASK_NBITS, link_mode_names,
			       compact);
	if (ret < 0)
		return -EMSGSIZE;
	if (!data->peer_empty) {
		ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_PEER,
				       ksettings->link_modes.lp_advertising,
				       NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
				       link_mode_names, compact);
		if (ret < 0)
			return -EMSGSIZE;
	}

	if (nla_put_u32(skb, ETHTOOL_A_LINKMODES_SPEED, lsettings->speed) ||
	    nla_put_u8(skb, ETHTOOL_A_LINKMODES_DUPLEX, lsettings->duplex))
		return -EMSGSIZE;

	return 0;
}

const struct ethnl_request_ops ethnl_linkmodes_request_ops = {
	.request_cmd		= ETHTOOL_MSG_LINKMODES_GET,
	.reply_cmd		= ETHTOOL_MSG_LINKMODES_GET_REPLY,
	.hdr_attr		= ETHTOOL_A_LINKMODES_HEADER,
	.max_attr		= ETHTOOL_A_LINKMODES_MAX,
	.req_info_size		= sizeof(struct linkmodes_req_info),
	.reply_data_size	= sizeof(struct linkmodes_reply_data),
	.request_policy		= linkmodes_get_policy,

	.prepare_data		= linkmodes_prepare_data,
	.reply_size		= linkmodes_reply_size,
	.fill_reply		= linkmodes_fill_reply,
};

/* LINKMODES_SET */

struct link_mode_info {
	int				speed;
	u8				duplex;
};

#define __DEFINE_LINK_MODE_PARAMS(_speed, _type, _duplex) \
	[ETHTOOL_LINK_MODE(_speed, _type, _duplex)] = { \
		.speed	= SPEED_ ## _speed, \
		.duplex	= __DUPLEX_ ## _duplex \
	}
#define __DUPLEX_Half DUPLEX_HALF
#define __DUPLEX_Full DUPLEX_FULL
#define __DEFINE_SPECIAL_MODE_PARAMS(_mode) \
	[ETHTOOL_LINK_MODE_ ## _mode ## _BIT] = { \
		.speed	= SPEED_UNKNOWN, \
		.duplex	= DUPLEX_UNKNOWN, \
	}

static const struct link_mode_info link_mode_params[] = {
	__DEFINE_LINK_MODE_PARAMS(10, T, Half),
	__DEFINE_LINK_MODE_PARAMS(10, T, Full),
	__DEFINE_LINK_MODE_PARAMS(100, T, Half),
	__DEFINE_LINK_MODE_PARAMS(100, T, Full),
	__DEFINE_LINK_MODE_PARAMS(1000, T, Half),
	__DEFINE_LINK_MODE_PARAMS(1000, T, Full),
	__DEFINE_SPECIAL_MODE_PARAMS(Autoneg),
	__DEFINE_SPECIAL_MODE_PARAMS(TP),
	__DEFINE_SPECIAL_MODE_PARAMS(AUI),
	__DEFINE_SPECIAL_MODE_PARAMS(MII),
	__DEFINE_SPECIAL_MODE_PARAMS(FIBRE),
	__DEFINE_SPECIAL_MODE_PARAMS(BNC),
	__DEFINE_LINK_MODE_PARAMS(10000, T, Full),
	__DEFINE_SPECIAL_MODE_PARAMS(Pause),
	__DEFINE_SPECIAL_MODE_PARAMS(Asym_Pause),
	__DEFINE_LINK_MODE_PARAMS(2500, X, Full),
	__DEFINE_SPECIAL_MODE_PARAMS(Backplane),
	__DEFINE_LINK_MODE_PARAMS(1000, KX, Full),
	__DEFINE_LINK_MODE_PARAMS(10000, KX4, Full),
	__DEFINE_LINK_MODE_PARAMS(10000, KR, Full),
	[ETHTOOL_LINK_MODE_10000baseR_FEC_BIT] = {
		.speed	= SPEED_10000,
		.duplex = DUPLEX_FULL,
	},
	__DEFINE_LINK_MODE_PARAMS(20000, MLD2, Full),
	__DEFINE_LINK_MODE_PARAMS(20000, KR2, Full),
	__DEFINE_LINK_MODE_PARAMS(40000, KR4, Full),
	__DEFINE_LINK_MODE_PARAMS(40000, CR4, Full),
	__DEFINE_LINK_MODE_PARAMS(40000, SR4, Full),
	__DEFINE_LINK_MODE_PARAMS(40000, LR4, Full),
	__DEFINE_LINK_MODE_PARAMS(56000, KR4, Full),
	__DEFINE_LINK_MODE_PARAMS(56000, CR4, Full),
	__DEFINE_LINK_MODE_PARAMS(56000, SR4, Full),
	__DEFINE_LINK_MODE_PARAMS(56000, LR4, Full),
	__DEFINE_LINK_MODE_PARAMS(25000, CR, Full),
	__DEFINE_LINK_MODE_PARAMS(25000, KR, Full),
	__DEFINE_LINK_MODE_PARAMS(25000, SR, Full),
	__DEFINE_LINK_MODE_PARAMS(50000, CR2, Full),
	__DEFINE_LINK_MODE_PARAMS(50000, KR2, Full),
	__DEFINE_LINK_MODE_PARAMS(100000, KR4, Full),
	__DEFINE_LINK_MODE_PARAMS(100000, SR4, Full),
	__DEFINE_LINK_MODE_PARAMS(100000, CR4, Full),
	__DEFINE_LINK_MODE_PARAMS(100000, LR4_ER4, Full),
	__DEFINE_LINK_MODE_PARAMS(50000, SR2, Full),
	__DEFINE_LINK_MODE_PARAMS(1000, X, Full),
	__DEFINE_LINK_MODE_PARAMS(10000, CR, Full),
	__DEFINE_LINK_MODE_PARAMS(10000, SR, Full),
	__DEFINE_LINK_MODE_PARAMS(10000, LR, Full),
	__DEFINE_LINK_MODE_PARAMS(10000, LRM, Full),
	__DEFINE_LINK_MODE_PARAMS(10000, ER, Full),
	__DEFINE_LINK_MODE_PARAMS(2500, T, Full),
	__DEFINE_LINK_MODE_PARAMS(5000, T, Full),
	__DEFINE_SPECIAL_MODE_PARAMS(FEC_NONE),
	__DEFINE_SPECIAL_MODE_PARAMS(FEC_RS),
	__DEFINE_SPECIAL_MODE_PARAMS(FEC_BASER),
	__DEFINE_LINK_MODE_PARAMS(50000, KR, Full),
	__DEFINE_LINK_MODE_PARAMS(50000, SR, Full),
	__DEFINE_LINK_MODE_PARAMS(50000, CR, Full),
	__DEFINE_LINK_MODE_PARAMS(50000, LR_ER_FR, Full),
	__DEFINE_LINK_MODE_PARAMS(50000, DR, Full),
	__DEFINE_LINK_MODE_PARAMS(100000, KR2, Full),
	__DEFINE_LINK_MODE_PARAMS(100000, SR2, Full),
	__DEFINE_LINK_MODE_PARAMS(100000, CR2, Full),
	__DEFINE_LINK_MODE_PARAMS(100000, LR2_ER2_FR2, Full),
	__DEFINE_LINK_MODE_PARAMS(100000, DR2, Full),
	__DEFINE_LINK_MODE_PARAMS(200000, KR4, Full),
	__DEFINE_LINK_MODE_PARAMS(200000, SR4, Full),
	__DEFINE_LINK_MODE_PARAMS(200000, LR4_ER4_FR4, Full),
	__DEFINE_LINK_MODE_PARAMS(200000, DR4, Full),
	__DEFINE_LINK_MODE_PARAMS(200000, CR4, Full),
	__DEFINE_LINK_MODE_PARAMS(100, T1, Full),
	__DEFINE_LINK_MODE_PARAMS(1000, T1, Full),
	__DEFINE_LINK_MODE_PARAMS(400000, KR8, Full),
	__DEFINE_LINK_MODE_PARAMS(400000, SR8, Full),
	__DEFINE_LINK_MODE_PARAMS(400000, LR8_ER8_FR8, Full),
	__DEFINE_LINK_MODE_PARAMS(400000, DR8, Full),
	__DEFINE_LINK_MODE_PARAMS(400000, CR8, Full),
	__DEFINE_SPECIAL_MODE_PARAMS(FEC_LLRS),
};

static const struct nla_policy
linkmodes_set_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
	[ETHTOOL_A_LINKMODES_UNSPEC]		= { .type = NLA_REJECT },
	[ETHTOOL_A_LINKMODES_HEADER]		= { .type = NLA_NESTED },
	[ETHTOOL_A_LINKMODES_AUTONEG]		= { .type = NLA_U8 },
	[ETHTOOL_A_LINKMODES_OURS]		= { .type = NLA_NESTED },
	[ETHTOOL_A_LINKMODES_PEER]		= { .type = NLA_REJECT },
	[ETHTOOL_A_LINKMODES_SPEED]		= { .type = NLA_U32 },
	[ETHTOOL_A_LINKMODES_DUPLEX]		= { .type = NLA_U8 },
};

/* Set advertised link modes to all supported modes matching requested speed
 * and duplex values. Called when autonegotiation is on, speed or duplex is
 * requested but no link mode change. This is done in userspace with ioctl()
 * interface, move it into kernel for netlink.
 * Returns true if advertised modes bitmap was modified.
 */
static bool ethnl_auto_linkmodes(struct ethtool_link_ksettings *ksettings,
				 bool req_speed, bool req_duplex)
{
	unsigned long *advertising = ksettings->link_modes.advertising;
	unsigned long *supported = ksettings->link_modes.supported;
	DECLARE_BITMAP(old_adv, __ETHTOOL_LINK_MODE_MASK_NBITS);
	unsigned int i;

	BUILD_BUG_ON(ARRAY_SIZE(link_mode_params) !=
		     __ETHTOOL_LINK_MODE_MASK_NBITS);

	bitmap_copy(old_adv, advertising, __ETHTOOL_LINK_MODE_MASK_NBITS);

	for (i = 0; i < __ETHTOOL_LINK_MODE_MASK_NBITS; i++) {
		const struct link_mode_info *info = &link_mode_params[i];

		if (info->speed == SPEED_UNKNOWN)
			continue;
		if (test_bit(i, supported) &&
		    (!req_speed || info->speed == ksettings->base.speed) &&
		    (!req_duplex || info->duplex == ksettings->base.duplex))
			set_bit(i, advertising);
		else
			clear_bit(i, advertising);
	}

	return !bitmap_equal(old_adv, advertising,
			     __ETHTOOL_LINK_MODE_MASK_NBITS);
}

static int ethnl_update_linkmodes(struct genl_info *info, struct nlattr **tb,
				  struct ethtool_link_ksettings *ksettings,
				  bool *mod)
{
	struct ethtool_link_settings *lsettings = &ksettings->base;
	bool req_speed, req_duplex;
	int ret;

	*mod = false;
	req_speed = tb[ETHTOOL_A_LINKMODES_SPEED];
	req_duplex = tb[ETHTOOL_A_LINKMODES_DUPLEX];

	ethnl_update_u8(&lsettings->autoneg, tb[ETHTOOL_A_LINKMODES_AUTONEG],
			mod);
	ret = ethnl_update_bitset(ksettings->link_modes.advertising,
				  __ETHTOOL_LINK_MODE_MASK_NBITS,
				  tb[ETHTOOL_A_LINKMODES_OURS], link_mode_names,
				  info->extack, mod);
	if (ret < 0)
		return ret;
	ethnl_update_u32(&lsettings->speed, tb[ETHTOOL_A_LINKMODES_SPEED],
			 mod);
	ethnl_update_u8(&lsettings->duplex, tb[ETHTOOL_A_LINKMODES_DUPLEX],
			mod);

	if (!tb[ETHTOOL_A_LINKMODES_OURS] && lsettings->autoneg &&
	    (req_speed || req_duplex) &&
	    ethnl_auto_linkmodes(ksettings, req_speed, req_duplex))
		*mod = true;

	return 0;
}

int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info)
{
	struct nlattr *tb[ETHTOOL_A_LINKMODES_MAX + 1];
	struct ethtool_link_ksettings ksettings = {};
	struct ethnl_req_info req_info = {};
	struct net_device *dev;
	bool mod = false;
	int ret;

	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
			  ETHTOOL_A_LINKMODES_MAX, linkmodes_set_policy,
			  info->extack);
	if (ret < 0)
		return ret;
	ret = ethnl_parse_header_dev_get(&req_info,
					 tb[ETHTOOL_A_LINKMODES_HEADER],
					 genl_info_net(info), info->extack,
					 true);
	if (ret < 0)
		return ret;
	dev = req_info.dev;
	ret = -EOPNOTSUPP;
	if (!dev->ethtool_ops->get_link_ksettings ||
	    !dev->ethtool_ops->set_link_ksettings)
		goto out_dev;

	rtnl_lock();
	ret = ethnl_ops_begin(dev);
	if (ret < 0)
		goto out_rtnl;

	ret = __ethtool_get_link_ksettings(dev, &ksettings);
	if (ret < 0) {
		if (info)
			GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
		goto out_ops;
	}

	ret = ethnl_update_linkmodes(info, tb, &ksettings, &mod);
	if (ret < 0)
		goto out_ops;

	if (mod) {
		ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
		if (ret < 0)
			GENL_SET_ERR_MSG(info, "link settings update failed");
		else
			ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
	}

out_ops:
	ethnl_ops_complete(dev);
out_rtnl:
	rtnl_unlock();
out_dev:
	dev_put(dev);
	return ret;
}
Commit	Line	Data
f625aa9b MK	1	// SPDX-License-Identifier: GPL-2.0-only
	2
	3	#include "netlink.h"
	4	#include "common.h"
	5	#include "bitset.h"
	6
	7	struct linkmodes_req_info {
	8	struct ethnl_req_info base;
	9	};
	10
	11	struct linkmodes_reply_data {
	12	struct ethnl_reply_data base;
	13	struct ethtool_link_ksettings ksettings;
	14	struct ethtool_link_settings *lsettings;
	15	bool peer_empty;
	16	};
	17
	18	#define LINKMODES_REPDATA(__reply_base) \
	19	container_of(__reply_base, struct linkmodes_reply_data, base)
	20
	21	static const struct nla_policy
	22	linkmodes_get_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
	23	[ETHTOOL_A_LINKMODES_UNSPEC] = { .type = NLA_REJECT },
	24	[ETHTOOL_A_LINKMODES_HEADER] = { .type = NLA_NESTED },
	25	[ETHTOOL_A_LINKMODES_AUTONEG] = { .type = NLA_REJECT },
	26	[ETHTOOL_A_LINKMODES_OURS] = { .type = NLA_REJECT },
	27	[ETHTOOL_A_LINKMODES_PEER] = { .type = NLA_REJECT },
	28	[ETHTOOL_A_LINKMODES_SPEED] = { .type = NLA_REJECT },
	29	[ETHTOOL_A_LINKMODES_DUPLEX] = { .type = NLA_REJECT },
	30	};
	31
	32	static int linkmodes_prepare_data(const struct ethnl_req_info *req_base,
	33	struct ethnl_reply_data *reply_base,
	34	struct genl_info *info)
	35	{
	36	struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
	37	struct net_device *dev = reply_base->dev;
	38	int ret;
	39
	40	data->lsettings = &data->ksettings.base;
	41
	42	ret = ethnl_ops_begin(dev);
	43	if (ret < 0)
	44	return ret;
	45
	46	ret = __ethtool_get_link_ksettings(dev, &data->ksettings);
	47	if (ret < 0 && info) {
	48	GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
	49	goto out;
	50	}
	51
	52	data->peer_empty =
	53	bitmap_empty(data->ksettings.link_modes.lp_advertising,
	54	__ETHTOOL_LINK_MODE_MASK_NBITS);
	55
	56	out:
	57	ethnl_ops_complete(dev);
	58	return ret;
	59	}
	60
	61	static int linkmodes_reply_size(const struct ethnl_req_info *req_base,
	62	const struct ethnl_reply_data *reply_base)
	63	{
	64	const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
65	const struct ethtool_link_ksettings *ksettings = &data->ksettings;
66	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
67	int len, ret;
68
69	len = nla_total_size(sizeof(u8)) /* LINKMODES_AUTONEG */
70	+ nla_total_size(sizeof(u32)) /* LINKMODES_SPEED */
71	+ nla_total_size(sizeof(u8)) /* LINKMODES_DUPLEX */
72	+ 0;
73	ret = ethnl_bitset_size(ksettings->link_modes.advertising,
74	ksettings->link_modes.supported,
75	__ETHTOOL_LINK_MODE_MASK_NBITS,
76	link_mode_names, compact);
77	if (ret < 0)
78	return ret;
79	len += ret;
80	if (!data->peer_empty) {
81	ret = ethnl_bitset_size(ksettings->link_modes.lp_advertising,
82	NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
83	link_mode_names, compact);
84	if (ret < 0)
85	return ret;
86	len += ret;
87	}
88
89	return len;
90	}
91
92	static int linkmodes_fill_reply(struct sk_buff *skb,
93	const struct ethnl_req_info *req_base,
94	const struct ethnl_reply_data *reply_base)
95	{
96	const struct linkmodes_reply_data *data = LINKMODES_REPDATA(reply_base);
97	const struct ethtool_link_ksettings *ksettings = &data->ksettings;
98	const struct ethtool_link_settings *lsettings = &ksettings->base;
99	bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
100	int ret;
101
102	if (nla_put_u8(skb, ETHTOOL_A_LINKMODES_AUTONEG, lsettings->autoneg))
103	return -EMSGSIZE;
104
105	ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_OURS,
106	ksettings->link_modes.advertising,
107	ksettings->link_modes.supported,
108	__ETHTOOL_LINK_MODE_MASK_NBITS, link_mode_names,
109	compact);
110	if (ret < 0)
111	return -EMSGSIZE;
112	if (!data->peer_empty) {
113	ret = ethnl_put_bitset(skb, ETHTOOL_A_LINKMODES_PEER,
114	ksettings->link_modes.lp_advertising,
115	NULL, __ETHTOOL_LINK_MODE_MASK_NBITS,
116	link_mode_names, compact);
117	if (ret < 0)
118	return -EMSGSIZE;
119	}
120
121	if (nla_put_u32(skb, ETHTOOL_A_LINKMODES_SPEED, lsettings->speed) \|\|
122	nla_put_u8(skb, ETHTOOL_A_LINKMODES_DUPLEX, lsettings->duplex))
123	return -EMSGSIZE;
124
125	return 0;
126	}
127
128	const struct ethnl_request_ops ethnl_linkmodes_request_ops = {
129	.request_cmd = ETHTOOL_MSG_LINKMODES_GET,
130	.reply_cmd = ETHTOOL_MSG_LINKMODES_GET_REPLY,
131	.hdr_attr = ETHTOOL_A_LINKMODES_HEADER,
132	.max_attr = ETHTOOL_A_LINKMODES_MAX,
133	.req_info_size = sizeof(struct linkmodes_req_info),
134	.reply_data_size = sizeof(struct linkmodes_reply_data),
135	.request_policy = linkmodes_get_policy,
136
137	.prepare_data = linkmodes_prepare_data,
138	.reply_size = linkmodes_reply_size,
139	.fill_reply = linkmodes_fill_reply,
140	};
bfbcfe20 MK	141
	142	/* LINKMODES_SET */
	143
	144	struct link_mode_info {
	145	int speed;
	146	u8 duplex;
	147	};
	148
	149	#define __DEFINE_LINK_MODE_PARAMS(_speed, _type, _duplex) \
	150	[ETHTOOL_LINK_MODE(_speed, _type, _duplex)] = { \
	151	.speed = SPEED_ ## _speed, \
	152	.duplex = __DUPLEX_ ## _duplex \
	153	}
	154	#define __DUPLEX_Half DUPLEX_HALF
	155	#define __DUPLEX_Full DUPLEX_FULL
	156	#define __DEFINE_SPECIAL_MODE_PARAMS(_mode) \
	157	[ETHTOOL_LINK_MODE_ ## _mode ## _BIT] = { \
	158	.speed = SPEED_UNKNOWN, \
	159	.duplex = DUPLEX_UNKNOWN, \
	160	}
	161
	162	static const struct link_mode_info link_mode_params[] = {
	163	__DEFINE_LINK_MODE_PARAMS(10, T, Half),
	164	__DEFINE_LINK_MODE_PARAMS(10, T, Full),
	165	__DEFINE_LINK_MODE_PARAMS(100, T, Half),
	166	__DEFINE_LINK_MODE_PARAMS(100, T, Full),
	167	__DEFINE_LINK_MODE_PARAMS(1000, T, Half),
	168	__DEFINE_LINK_MODE_PARAMS(1000, T, Full),
	169	__DEFINE_SPECIAL_MODE_PARAMS(Autoneg),
	170	__DEFINE_SPECIAL_MODE_PARAMS(TP),
	171	__DEFINE_SPECIAL_MODE_PARAMS(AUI),
	172	__DEFINE_SPECIAL_MODE_PARAMS(MII),
	173	__DEFINE_SPECIAL_MODE_PARAMS(FIBRE),
	174	__DEFINE_SPECIAL_MODE_PARAMS(BNC),
	175	__DEFINE_LINK_MODE_PARAMS(10000, T, Full),
	176	__DEFINE_SPECIAL_MODE_PARAMS(Pause),
	177	__DEFINE_SPECIAL_MODE_PARAMS(Asym_Pause),
	178	__DEFINE_LINK_MODE_PARAMS(2500, X, Full),
	179	__DEFINE_SPECIAL_MODE_PARAMS(Backplane),
	180	__DEFINE_LINK_MODE_PARAMS(1000, KX, Full),
	181	__DEFINE_LINK_MODE_PARAMS(10000, KX4, Full),
	182	__DEFINE_LINK_MODE_PARAMS(10000, KR, Full),
	183	[ETHTOOL_LINK_MODE_10000baseR_FEC_BIT] = {
	184	.speed = SPEED_10000,
	185	.duplex = DUPLEX_FULL,
	186	},
	187	__DEFINE_LINK_MODE_PARAMS(20000, MLD2, Full),
	188	__DEFINE_LINK_MODE_PARAMS(20000, KR2, Full),
	189	__DEFINE_LINK_MODE_PARAMS(40000, KR4, Full),
	190	__DEFINE_LINK_MODE_PARAMS(40000, CR4, Full),
	191	__DEFINE_LINK_MODE_PARAMS(40000, SR4, Full),
	192	__DEFINE_LINK_MODE_PARAMS(40000, LR4, Full),
	193	__DEFINE_LINK_MODE_PARAMS(56000, KR4, Full),
	194	__DEFINE_LINK_MODE_PARAMS(56000, CR4, Full),
	195	__DEFINE_LINK_MODE_PARAMS(56000, SR4, Full),
	196	__DEFINE_LINK_MODE_PARAMS(56000, LR4, Full),
	197	__DEFINE_LINK_MODE_PARAMS(25000, CR, Full),
	198	__DEFINE_LINK_MODE_PARAMS(25000, KR, Full),
	199	__DEFINE_LINK_MODE_PARAMS(25000, SR, Full),
	200	__DEFINE_LINK_MODE_PARAMS(50000, CR2, Full),
	201	__DEFINE_LINK_MODE_PARAMS(50000, KR2, Full),
	202	__DEFINE_LINK_MODE_PARAMS(100000, KR4, Full),
	203	__DEFINE_LINK_MODE_PARAMS(100000, SR4, Full),
	204	__DEFINE_LINK_MODE_PARAMS(100000, CR4, Full),
205	__DEFINE_LINK_MODE_PARAMS(100000, LR4_ER4, Full),
206	__DEFINE_LINK_MODE_PARAMS(50000, SR2, Full),
207	__DEFINE_LINK_MODE_PARAMS(1000, X, Full),
208	__DEFINE_LINK_MODE_PARAMS(10000, CR, Full),
209	__DEFINE_LINK_MODE_PARAMS(10000, SR, Full),
210	__DEFINE_LINK_MODE_PARAMS(10000, LR, Full),
211	__DEFINE_LINK_MODE_PARAMS(10000, LRM, Full),
212	__DEFINE_LINK_MODE_PARAMS(10000, ER, Full),
213	__DEFINE_LINK_MODE_PARAMS(2500, T, Full),
214	__DEFINE_LINK_MODE_PARAMS(5000, T, Full),
215	__DEFINE_SPECIAL_MODE_PARAMS(FEC_NONE),
216	__DEFINE_SPECIAL_MODE_PARAMS(FEC_RS),
217	__DEFINE_SPECIAL_MODE_PARAMS(FEC_BASER),
218	__DEFINE_LINK_MODE_PARAMS(50000, KR, Full),
219	__DEFINE_LINK_MODE_PARAMS(50000, SR, Full),
220	__DEFINE_LINK_MODE_PARAMS(50000, CR, Full),
221	__DEFINE_LINK_MODE_PARAMS(50000, LR_ER_FR, Full),
222	__DEFINE_LINK_MODE_PARAMS(50000, DR, Full),
223	__DEFINE_LINK_MODE_PARAMS(100000, KR2, Full),
224	__DEFINE_LINK_MODE_PARAMS(100000, SR2, Full),
225	__DEFINE_LINK_MODE_PARAMS(100000, CR2, Full),
226	__DEFINE_LINK_MODE_PARAMS(100000, LR2_ER2_FR2, Full),
227	__DEFINE_LINK_MODE_PARAMS(100000, DR2, Full),
228	__DEFINE_LINK_MODE_PARAMS(200000, KR4, Full),
229	__DEFINE_LINK_MODE_PARAMS(200000, SR4, Full),
230	__DEFINE_LINK_MODE_PARAMS(200000, LR4_ER4_FR4, Full),
231	__DEFINE_LINK_MODE_PARAMS(200000, DR4, Full),
232	__DEFINE_LINK_MODE_PARAMS(200000, CR4, Full),
233	__DEFINE_LINK_MODE_PARAMS(100, T1, Full),
234	__DEFINE_LINK_MODE_PARAMS(1000, T1, Full),
235	__DEFINE_LINK_MODE_PARAMS(400000, KR8, Full),
236	__DEFINE_LINK_MODE_PARAMS(400000, SR8, Full),
237	__DEFINE_LINK_MODE_PARAMS(400000, LR8_ER8_FR8, Full),
238	__DEFINE_LINK_MODE_PARAMS(400000, DR8, Full),
239	__DEFINE_LINK_MODE_PARAMS(400000, CR8, Full),
f623e597	240	__DEFINE_SPECIAL_MODE_PARAMS(FEC_LLRS),
bfbcfe20 MK	241	};
	242
	243	static const struct nla_policy
	244	linkmodes_set_policy[ETHTOOL_A_LINKMODES_MAX + 1] = {
	245	[ETHTOOL_A_LINKMODES_UNSPEC] = { .type = NLA_REJECT },
	246	[ETHTOOL_A_LINKMODES_HEADER] = { .type = NLA_NESTED },
	247	[ETHTOOL_A_LINKMODES_AUTONEG] = { .type = NLA_U8 },
	248	[ETHTOOL_A_LINKMODES_OURS] = { .type = NLA_NESTED },
	249	[ETHTOOL_A_LINKMODES_PEER] = { .type = NLA_REJECT },
	250	[ETHTOOL_A_LINKMODES_SPEED] = { .type = NLA_U32 },
	251	[ETHTOOL_A_LINKMODES_DUPLEX] = { .type = NLA_U8 },
	252	};
	253
	254	/* Set advertised link modes to all supported modes matching requested speed
	255	* and duplex values. Called when autonegotiation is on, speed or duplex is
	256	* requested but no link mode change. This is done in userspace with ioctl()
	257	* interface, move it into kernel for netlink.
	258	* Returns true if advertised modes bitmap was modified.
	259	*/
	260	static bool ethnl_auto_linkmodes(struct ethtool_link_ksettings *ksettings,
	261	bool req_speed, bool req_duplex)
	262	{
	263	unsigned long *advertising = ksettings->link_modes.advertising;
	264	unsigned long *supported = ksettings->link_modes.supported;
	265	DECLARE_BITMAP(old_adv, __ETHTOOL_LINK_MODE_MASK_NBITS);
	266	unsigned int i;
	267
	268	BUILD_BUG_ON(ARRAY_SIZE(link_mode_params) !=
	269	__ETHTOOL_LINK_MODE_MASK_NBITS);
	270
	271	bitmap_copy(old_adv, advertising, __ETHTOOL_LINK_MODE_MASK_NBITS);
	272
	273	for (i = 0; i < __ETHTOOL_LINK_MODE_MASK_NBITS; i++) {
	274	const struct link_mode_info *info = &link_mode_params[i];
	275
	276	if (info->speed == SPEED_UNKNOWN)
	277	continue;
	278	if (test_bit(i, supported) &&
	279	(!req_speed \|\| info->speed == ksettings->base.speed) &&
	280	(!req_duplex \|\| info->duplex == ksettings->base.duplex))
	281	set_bit(i, advertising);
	282	else
	283	clear_bit(i, advertising);
	284	}
	285
	286	return !bitmap_equal(old_adv, advertising,
	287	__ETHTOOL_LINK_MODE_MASK_NBITS);
	288	}
	289
	290	static int ethnl_update_linkmodes(struct genl_info info, struct nlattr *tb,
	291	struct ethtool_link_ksettings *ksettings,
	292	bool *mod)
	293	{
	294	struct ethtool_link_settings *lsettings = &ksettings->base;
	295	bool req_speed, req_duplex;
	296	int ret;
	297
	298	*mod = false;
	299	req_speed = tb[ETHTOOL_A_LINKMODES_SPEED];
	300	req_duplex = tb[ETHTOOL_A_LINKMODES_DUPLEX];
	301
	302	ethnl_update_u8(&lsettings->autoneg, tb[ETHTOOL_A_LINKMODES_AUTONEG],
	303	mod);
	304	ret = ethnl_update_bitset(ksettings->link_modes.advertising,
305	__ETHTOOL_LINK_MODE_MASK_NBITS,
306	tb[ETHTOOL_A_LINKMODES_OURS], link_mode_names,
307	info->extack, mod);
308	if (ret < 0)
309	return ret;
310	ethnl_update_u32(&lsettings->speed, tb[ETHTOOL_A_LINKMODES_SPEED],
311	mod);
312	ethnl_update_u8(&lsettings->duplex, tb[ETHTOOL_A_LINKMODES_DUPLEX],
313	mod);
314
315	if (!tb[ETHTOOL_A_LINKMODES_OURS] && lsettings->autoneg &&
316	(req_speed \|\| req_duplex) &&
317	ethnl_auto_linkmodes(ksettings, req_speed, req_duplex))
318	*mod = true;
319
320	return 0;
321	}
322
323	int ethnl_set_linkmodes(struct sk_buff skb, struct genl_info info)
324	{
325	struct nlattr *tb[ETHTOOL_A_LINKMODES_MAX + 1];
326	struct ethtool_link_ksettings ksettings = {};
bfbcfe20 MK	327	struct ethnl_req_info req_info = {};
	328	struct net_device *dev;
	329	bool mod = false;
	330	int ret;
	331
	332	ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
	333	ETHTOOL_A_LINKMODES_MAX, linkmodes_set_policy,
	334	info->extack);
	335	if (ret < 0)
	336	return ret;
98130546 MK	337	ret = ethnl_parse_header_dev_get(&req_info,
	338	tb[ETHTOOL_A_LINKMODES_HEADER],
	339	genl_info_net(info), info->extack,
	340	true);
bfbcfe20 MK	341	if (ret < 0)
	342	return ret;
	343	dev = req_info.dev;
2f599ec4	344	ret = -EOPNOTSUPP;
bfbcfe20 MK	345	if (!dev->ethtool_ops->get_link_ksettings \|\|
bfbcfe20 MK	346	!dev->ethtool_ops->set_link_ksettings)
2f599ec4	347	goto out_dev;
bfbcfe20 MK	348
	349	rtnl_lock();
	350	ret = ethnl_ops_begin(dev);
	351	if (ret < 0)
	352	goto out_rtnl;
	353
	354	ret = __ethtool_get_link_ksettings(dev, &ksettings);
	355	if (ret < 0) {
	356	if (info)
	357	GENL_SET_ERR_MSG(info, "failed to retrieve link settings");
	358	goto out_ops;
	359	}
bfbcfe20 MK	360
	361	ret = ethnl_update_linkmodes(info, tb, &ksettings, &mod);
	362	if (ret < 0)
	363	goto out_ops;
	364
	365	if (mod) {
	366	ret = dev->ethtool_ops->set_link_ksettings(dev, &ksettings);
	367	if (ret < 0)
	368	GENL_SET_ERR_MSG(info, "link settings update failed");
1b1b1847 MK	369	else
1b1b1847 MK	370	ethtool_notify(dev, ETHTOOL_MSG_LINKMODES_NTF, NULL);
bfbcfe20 MK	371	}
	372
	373	out_ops:
	374	ethnl_ops_complete(dev);
	375	out_rtnl:
	376	rtnl_unlock();
2f599ec4	377	out_dev:
bfbcfe20 MK	378	dev_put(dev);
	379	return ret;
	380	}