[linux-block.git] / net / ethtool / cabletest.c

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

#include <linux/phy.h>
#include <linux/ethtool_netlink.h>
#include "netlink.h"
#include "common.h"

/* 802.3 standard allows 100 meters for BaseT cables. However longer
 * cables might work, depending on the quality of the cables and the
 * PHY. So allow testing for up to 150 meters.
 */
#define MAX_CABLE_LENGTH_CM (150 * 100)

const struct nla_policy ethnl_cable_test_act_policy[] = {
	[ETHTOOL_A_CABLE_TEST_HEADER]		=
		NLA_POLICY_NESTED(ethnl_header_policy),
};

static int ethnl_cable_test_started(struct phy_device *phydev, u8 cmd)
{
	struct sk_buff *skb;
	int err = -ENOMEM;
	void *ehdr;

	skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!skb)
		goto out;

	ehdr = ethnl_bcastmsg_put(skb, cmd);
	if (!ehdr) {
		err = -EMSGSIZE;
		goto out;
	}

	err = ethnl_fill_reply_header(skb, phydev->attached_dev,
				      ETHTOOL_A_CABLE_TEST_NTF_HEADER);
	if (err)
		goto out;

	err = nla_put_u8(skb, ETHTOOL_A_CABLE_TEST_NTF_STATUS,
			 ETHTOOL_A_CABLE_TEST_NTF_STATUS_STARTED);
	if (err)
		goto out;

	genlmsg_end(skb, ehdr);

	return ethnl_multicast(skb, phydev->attached_dev);

out:
	nlmsg_free(skb);
	phydev_err(phydev, "%s: Error %pe\n", __func__, ERR_PTR(err));

	return err;
}

int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info)
{
	struct ethnl_req_info req_info = {};
	const struct ethtool_phy_ops *ops;
	struct nlattr **tb = info->attrs;
	struct net_device *dev;
	int ret;

	ret = ethnl_parse_header_dev_get(&req_info,
					 tb[ETHTOOL_A_CABLE_TEST_HEADER],
					 genl_info_net(info), info->extack,
					 true);
	if (ret < 0)
		return ret;

	dev = req_info.dev;
	if (!dev->phydev) {
		ret = -EOPNOTSUPP;
		goto out_dev_put;
	}

	rtnl_lock();
	ops = ethtool_phy_ops;
	if (!ops || !ops->start_cable_test) {
		ret = -EOPNOTSUPP;
		goto out_rtnl;
	}

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

	ret = ops->start_cable_test(dev->phydev, info->extack);

	ethnl_ops_complete(dev);

	if (!ret)
		ethnl_cable_test_started(dev->phydev,
					 ETHTOOL_MSG_CABLE_TEST_NTF);

out_rtnl:
	rtnl_unlock();
out_dev_put:
	ethnl_parse_header_dev_put(&req_info);
	return ret;
}

int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
{
	int err = -ENOMEM;

	/* One TDR sample occupies 20 bytes. For a 150 meter cable,
	 * with four pairs, around 12K is needed.
	 */
	phydev->skb = genlmsg_new(SZ_16K, GFP_KERNEL);
	if (!phydev->skb)
		goto out;

	phydev->ehdr = ethnl_bcastmsg_put(phydev->skb, cmd);
	if (!phydev->ehdr) {
		err = -EMSGSIZE;
		goto out;
	}

	err = ethnl_fill_reply_header(phydev->skb, phydev->attached_dev,
				      ETHTOOL_A_CABLE_TEST_NTF_HEADER);
	if (err)
		goto out;

	err = nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_TEST_NTF_STATUS,
			 ETHTOOL_A_CABLE_TEST_NTF_STATUS_COMPLETED);
	if (err)
		goto out;

	phydev->nest = nla_nest_start(phydev->skb,
				      ETHTOOL_A_CABLE_TEST_NTF_NEST);
	if (!phydev->nest) {
		err = -EMSGSIZE;
		goto out;
	}

	return 0;

out:
	nlmsg_free(phydev->skb);
	phydev->skb = NULL;
	return err;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_alloc);

void ethnl_cable_test_free(struct phy_device *phydev)
{
	nlmsg_free(phydev->skb);
	phydev->skb = NULL;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_free);

void ethnl_cable_test_finished(struct phy_device *phydev)
{
	nla_nest_end(phydev->skb, phydev->nest);

	genlmsg_end(phydev->skb, phydev->ehdr);

	ethnl_multicast(phydev->skb, phydev->attached_dev);
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_finished);

int ethnl_cable_test_result(struct phy_device *phydev, u8 pair, u8 result)
{
	struct nlattr *nest;
	int ret = -EMSGSIZE;

	nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_NEST_RESULT);
	if (!nest)
		return -EMSGSIZE;

	if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_RESULT_PAIR, pair))
		goto err;
	if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_RESULT_CODE, result))
		goto err;

	nla_nest_end(phydev->skb, nest);
	return 0;

err:
	nla_nest_cancel(phydev->skb, nest);
	return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_result);

int ethnl_cable_test_fault_length(struct phy_device *phydev, u8 pair, u32 cm)
{
	struct nlattr *nest;
	int ret = -EMSGSIZE;

	nest = nla_nest_start(phydev->skb,
			      ETHTOOL_A_CABLE_NEST_FAULT_LENGTH);
	if (!nest)
		return -EMSGSIZE;

	if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_FAULT_LENGTH_PAIR, pair))
		goto err;
	if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_FAULT_LENGTH_CM, cm))
		goto err;

	nla_nest_end(phydev->skb, nest);
	return 0;

err:
	nla_nest_cancel(phydev->skb, nest);
	return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_fault_length);

struct cable_test_tdr_req_info {
	struct ethnl_req_info		base;
};

static const struct nla_policy cable_test_tdr_act_cfg_policy[] = {
	[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST]	= { .type = NLA_U32 },
	[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST]	= { .type = NLA_U32 },
	[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP]	= { .type = NLA_U32 },
	[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]	= { .type = NLA_U8 },
};

const struct nla_policy ethnl_cable_test_tdr_act_policy[] = {
	[ETHTOOL_A_CABLE_TEST_TDR_HEADER]	=
		NLA_POLICY_NESTED(ethnl_header_policy),
	[ETHTOOL_A_CABLE_TEST_TDR_CFG]		= { .type = NLA_NESTED },
};

/* CABLE_TEST_TDR_ACT */
static int ethnl_act_cable_test_tdr_cfg(const struct nlattr *nest,
					struct genl_info *info,
					struct phy_tdr_config *cfg)
{
	struct nlattr *tb[ARRAY_SIZE(cable_test_tdr_act_cfg_policy)];
	int ret;

	cfg->first = 100;
	cfg->step = 100;
	cfg->last = MAX_CABLE_LENGTH_CM;
	cfg->pair = PHY_PAIR_ALL;

	if (!nest)
		return 0;

	ret = nla_parse_nested(tb,
			       ARRAY_SIZE(cable_test_tdr_act_cfg_policy) - 1,
			       nest, cable_test_tdr_act_cfg_policy,
			       info->extack);
	if (ret < 0)
		return ret;

	if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST])
		cfg->first = nla_get_u32(
			tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST]);

	if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST])
		cfg->last = nla_get_u32(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST]);

	if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP])
		cfg->step = nla_get_u32(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP]);

	if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]) {
		cfg->pair = nla_get_u8(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]);
		if (cfg->pair > ETHTOOL_A_CABLE_PAIR_D) {
			NL_SET_ERR_MSG_ATTR(
				info->extack,
				tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR],
				"invalid pair parameter");
			return -EINVAL;
		}
	}

	if (cfg->first > MAX_CABLE_LENGTH_CM) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST],
				    "invalid first parameter");
		return -EINVAL;
	}

	if (cfg->last > MAX_CABLE_LENGTH_CM) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST],
				    "invalid last parameter");
		return -EINVAL;
	}

	if (cfg->first > cfg->last) {
		NL_SET_ERR_MSG(info->extack, "invalid first/last parameter");
		return -EINVAL;
	}

	if (!cfg->step) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP],
				    "invalid step parameter");
		return -EINVAL;
	}

	if (cfg->step > (cfg->last - cfg->first)) {
		NL_SET_ERR_MSG_ATTR(info->extack,
				    tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP],
				    "step parameter too big");
		return -EINVAL;
	}

	return 0;
}

int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info)
{
	struct ethnl_req_info req_info = {};
	const struct ethtool_phy_ops *ops;
	struct nlattr **tb = info->attrs;
	struct phy_tdr_config cfg;
	struct net_device *dev;
	int ret;

	ret = ethnl_parse_header_dev_get(&req_info,
					 tb[ETHTOOL_A_CABLE_TEST_TDR_HEADER],
					 genl_info_net(info), info->extack,
					 true);
	if (ret < 0)
		return ret;

	dev = req_info.dev;
	if (!dev->phydev) {
		ret = -EOPNOTSUPP;
		goto out_dev_put;
	}

	ret = ethnl_act_cable_test_tdr_cfg(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG],
					   info, &cfg);
	if (ret)
		goto out_dev_put;

	rtnl_lock();
	ops = ethtool_phy_ops;
	if (!ops || !ops->start_cable_test_tdr) {
		ret = -EOPNOTSUPP;
		goto out_rtnl;
	}

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

	ret = ops->start_cable_test_tdr(dev->phydev, info->extack, &cfg);

	ethnl_ops_complete(dev);

	if (!ret)
		ethnl_cable_test_started(dev->phydev,
					 ETHTOOL_MSG_CABLE_TEST_TDR_NTF);

out_rtnl:
	rtnl_unlock();
out_dev_put:
	ethnl_parse_header_dev_put(&req_info);
	return ret;
}

int ethnl_cable_test_amplitude(struct phy_device *phydev,
			       u8 pair, s16 mV)
{
	struct nlattr *nest;
	int ret = -EMSGSIZE;

	nest = nla_nest_start(phydev->skb,
			      ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE);
	if (!nest)
		return -EMSGSIZE;

	if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_AMPLITUDE_PAIR, pair))
		goto err;
	if (nla_put_u16(phydev->skb, ETHTOOL_A_CABLE_AMPLITUDE_mV, mV))
		goto err;

	nla_nest_end(phydev->skb, nest);
	return 0;

err:
	nla_nest_cancel(phydev->skb, nest);
	return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_amplitude);

int ethnl_cable_test_pulse(struct phy_device *phydev, u16 mV)
{
	struct nlattr *nest;
	int ret = -EMSGSIZE;

	nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_TDR_NEST_PULSE);
	if (!nest)
		return -EMSGSIZE;

	if (nla_put_u16(phydev->skb, ETHTOOL_A_CABLE_PULSE_mV, mV))
		goto err;

	nla_nest_end(phydev->skb, nest);
	return 0;

err:
	nla_nest_cancel(phydev->skb, nest);
	return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_pulse);

int ethnl_cable_test_step(struct phy_device *phydev, u32 first, u32 last,
			  u32 step)
{
	struct nlattr *nest;
	int ret = -EMSGSIZE;

	nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_TDR_NEST_STEP);
	if (!nest)
		return -EMSGSIZE;

	if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_FIRST_DISTANCE,
			first))
		goto err;

	if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_LAST_DISTANCE, last))
		goto err;

	if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_STEP_DISTANCE, step))
		goto err;

	nla_nest_end(phydev->skb, nest);
	return 0;

err:
	nla_nest_cancel(phydev->skb, nest);
	return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_step);
Commit	Line	Data
11ca3c42 AL	1	// SPDX-License-Identifier: GPL-2.0-only
	2
	3	#include <linux/phy.h>
1dd3f212	4	#include <linux/ethtool_netlink.h>
11ca3c42 AL	5	#include "netlink.h"
	6	#include "common.h"
	7
f2bc8ad3 AL	8	/* 802.3 standard allows 100 meters for BaseT cables. However longer
	9	* cables might work, depending on the quality of the cables and the
	10	* PHY. So allow testing for up to 150 meters.
	11	*/
	12	#define MAX_CABLE_LENGTH_CM (150 * 100)
11ca3c42	13
ff419afa	14	const struct nla_policy ethnl_cable_test_act_policy[] = {
329d9c33 JK	15	[ETHTOOL_A_CABLE_TEST_HEADER] =
329d9c33 JK	16	NLA_POLICY_NESTED(ethnl_header_policy),
11ca3c42 AL	17	};
11ca3c42 AL	18
1a644de2	19	static int ethnl_cable_test_started(struct phy_device *phydev, u8 cmd)
9896a457 AL	20	{
	21	struct sk_buff *skb;
	22	int err = -ENOMEM;
	23	void *ehdr;
	24
	25	skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	26	if (!skb)
	27	goto out;
	28
1a644de2	29	ehdr = ethnl_bcastmsg_put(skb, cmd);
9896a457 AL	30	if (!ehdr) {
	31	err = -EMSGSIZE;
	32	goto out;
	33	}
	34
	35	err = ethnl_fill_reply_header(skb, phydev->attached_dev,
	36	ETHTOOL_A_CABLE_TEST_NTF_HEADER);
	37	if (err)
	38	goto out;
	39
	40	err = nla_put_u8(skb, ETHTOOL_A_CABLE_TEST_NTF_STATUS,
	41	ETHTOOL_A_CABLE_TEST_NTF_STATUS_STARTED);
	42	if (err)
	43	goto out;
	44
	45	genlmsg_end(skb, ehdr);
	46
	47	return ethnl_multicast(skb, phydev->attached_dev);
	48
	49	out:
	50	nlmsg_free(skb);
	51	phydev_err(phydev, "%s: Error %pe\n", __func__, ERR_PTR(err));
	52
	53	return err;
	54	}
	55
11ca3c42 AL	56	int ethnl_act_cable_test(struct sk_buff skb, struct genl_info info)
11ca3c42 AL	57	{
11ca3c42	58	struct ethnl_req_info req_info = {};
f3631ab0	59	const struct ethtool_phy_ops *ops;
5028588b	60	struct nlattr **tb = info->attrs;
11ca3c42 AL	61	struct net_device *dev;
	62	int ret;
	63
11ca3c42 AL	64	ret = ethnl_parse_header_dev_get(&req_info,
	65	tb[ETHTOOL_A_CABLE_TEST_HEADER],
	66	genl_info_net(info), info->extack,
	67	true);
	68	if (ret < 0)
	69	return ret;
	70
	71	dev = req_info.dev;
	72	if (!dev->phydev) {
	73	ret = -EOPNOTSUPP;
	74	goto out_dev_put;
	75	}
	76
	77	rtnl_lock();
f3631ab0 FF	78	ops = ethtool_phy_ops;
	79	if (!ops \|\| !ops->start_cable_test) {
	80	ret = -EOPNOTSUPP;
	81	goto out_rtnl;
	82	}
	83
11ca3c42 AL	84	ret = ethnl_ops_begin(dev);
	85	if (ret < 0)
	86	goto out_rtnl;
	87
f3631ab0	88	ret = ops->start_cable_test(dev->phydev, info->extack);
11ca3c42 AL	89
11ca3c42 AL	90	ethnl_ops_complete(dev);
9896a457 AL	91
9896a457 AL	92	if (!ret)
1a644de2 AL	93	ethnl_cable_test_started(dev->phydev,
1a644de2 AL	94	ETHTOOL_MSG_CABLE_TEST_NTF);
9896a457	95
11ca3c42 AL	96	out_rtnl:
	97	rtnl_unlock();
	98	out_dev_put:
34ac17ec	99	ethnl_parse_header_dev_put(&req_info);
11ca3c42 AL	100	return ret;
11ca3c42 AL	101	}
1dd3f212	102
1a644de2	103	int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
1dd3f212 AL	104	{
	105	int err = -ENOMEM;
	106
6b4a0fc1 AL	107	/* One TDR sample occupies 20 bytes. For a 150 meter cable,
	108	* with four pairs, around 12K is needed.
	109	*/
	110	phydev->skb = genlmsg_new(SZ_16K, GFP_KERNEL);
1dd3f212 AL	111	if (!phydev->skb)
	112	goto out;
	113
1a644de2	114	phydev->ehdr = ethnl_bcastmsg_put(phydev->skb, cmd);
1dd3f212 AL	115	if (!phydev->ehdr) {
	116	err = -EMSGSIZE;
	117	goto out;
	118	}
	119
	120	err = ethnl_fill_reply_header(phydev->skb, phydev->attached_dev,
	121	ETHTOOL_A_CABLE_TEST_NTF_HEADER);
	122	if (err)
	123	goto out;
	124
	125	err = nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_TEST_NTF_STATUS,
	126	ETHTOOL_A_CABLE_TEST_NTF_STATUS_COMPLETED);
	127	if (err)
	128	goto out;
	129
	130	phydev->nest = nla_nest_start(phydev->skb,
	131	ETHTOOL_A_CABLE_TEST_NTF_NEST);
1e2dc145 AL	132	if (!phydev->nest) {
1e2dc145 AL	133	err = -EMSGSIZE;
1dd3f212	134	goto out;
1e2dc145	135	}
1dd3f212 AL	136
	137	return 0;
	138
	139	out:
	140	nlmsg_free(phydev->skb);
1e2dc145	141	phydev->skb = NULL;
1dd3f212 AL	142	return err;
	143	}
	144	EXPORT_SYMBOL_GPL(ethnl_cable_test_alloc);
	145
	146	void ethnl_cable_test_free(struct phy_device *phydev)
	147	{
	148	nlmsg_free(phydev->skb);
1e2dc145	149	phydev->skb = NULL;
1dd3f212 AL	150	}
	151	EXPORT_SYMBOL_GPL(ethnl_cable_test_free);
	152
	153	void ethnl_cable_test_finished(struct phy_device *phydev)
	154	{
	155	nla_nest_end(phydev->skb, phydev->nest);
	156
	157	genlmsg_end(phydev->skb, phydev->ehdr);
	158
	159	ethnl_multicast(phydev->skb, phydev->attached_dev);
	160	}
	161	EXPORT_SYMBOL_GPL(ethnl_cable_test_finished);
1e2dc145 AL	162
	163	int ethnl_cable_test_result(struct phy_device *phydev, u8 pair, u8 result)
	164	{
	165	struct nlattr *nest;
	166	int ret = -EMSGSIZE;
	167
	168	nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_NEST_RESULT);
	169	if (!nest)
	170	return -EMSGSIZE;
	171
	172	if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_RESULT_PAIR, pair))
	173	goto err;
	174	if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_RESULT_CODE, result))
	175	goto err;
	176
	177	nla_nest_end(phydev->skb, nest);
	178	return 0;
	179
	180	err:
	181	nla_nest_cancel(phydev->skb, nest);
	182	return ret;
	183	}
	184	EXPORT_SYMBOL_GPL(ethnl_cable_test_result);
	185
	186	int ethnl_cable_test_fault_length(struct phy_device *phydev, u8 pair, u32 cm)
	187	{
	188	struct nlattr *nest;
	189	int ret = -EMSGSIZE;
	190
	191	nest = nla_nest_start(phydev->skb,
	192	ETHTOOL_A_CABLE_NEST_FAULT_LENGTH);
	193	if (!nest)
	194	return -EMSGSIZE;
	195
	196	if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_FAULT_LENGTH_PAIR, pair))
	197	goto err;
	198	if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_FAULT_LENGTH_CM, cm))
	199	goto err;
	200
	201	nla_nest_end(phydev->skb, nest);
	202	return 0;
	203
	204	err:
	205	nla_nest_cancel(phydev->skb, nest);
	206	return ret;
	207	}
	208	EXPORT_SYMBOL_GPL(ethnl_cable_test_fault_length);
1a644de2	209
f2bc8ad3 AL	210	struct cable_test_tdr_req_info {
	211	struct ethnl_req_info base;
	212	};
	213
ff419afa	214	static const struct nla_policy cable_test_tdr_act_cfg_policy[] = {
f2bc8ad3 AL	215	[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST] = { .type = NLA_U32 },
	216	[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST] = { .type = NLA_U32 },
	217	[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP] = { .type = NLA_U32 },
	218	[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR] = { .type = NLA_U8 },
	219	};
	220
ff419afa	221	const struct nla_policy ethnl_cable_test_tdr_act_policy[] = {
329d9c33 JK	222	[ETHTOOL_A_CABLE_TEST_TDR_HEADER] =
329d9c33 JK	223	NLA_POLICY_NESTED(ethnl_header_policy),
f2bc8ad3	224	[ETHTOOL_A_CABLE_TEST_TDR_CFG] = { .type = NLA_NESTED },
1a644de2 AL	225	};
1a644de2 AL	226
f2bc8ad3	227	/* CABLE_TEST_TDR_ACT */
fd55199d AL	228	static int ethnl_act_cable_test_tdr_cfg(const struct nlattr *nest,
	229	struct genl_info *info,
	230	struct phy_tdr_config *cfg)
f2bc8ad3	231	{
ff419afa	232	struct nlattr *tb[ARRAY_SIZE(cable_test_tdr_act_cfg_policy)];
f2bc8ad3 AL	233	int ret;
f2bc8ad3 AL	234
4b973f49 AL	235	cfg->first = 100;
	236	cfg->step = 100;
	237	cfg->last = MAX_CABLE_LENGTH_CM;
	238	cfg->pair = PHY_PAIR_ALL;
	239
	240	if (!nest)
	241	return 0;
	242
ff419afa JK	243	ret = nla_parse_nested(tb,
	244	ARRAY_SIZE(cable_test_tdr_act_cfg_policy) - 1,
	245	nest, cable_test_tdr_act_cfg_policy,
	246	info->extack);
f2bc8ad3 AL	247	if (ret < 0)
	248	return ret;
	249
	250	if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST])
	251	cfg->first = nla_get_u32(
	252	tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST]);
4b973f49	253
f2bc8ad3 AL	254	if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST])
f2bc8ad3 AL	255	cfg->last = nla_get_u32(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST]);
f2bc8ad3 AL	256
	257	if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP])
	258	cfg->step = nla_get_u32(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP]);
f2bc8ad3 AL	259
	260	if (tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]) {
	261	cfg->pair = nla_get_u8(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR]);
	262	if (cfg->pair > ETHTOOL_A_CABLE_PAIR_D) {
	263	NL_SET_ERR_MSG_ATTR(
	264	info->extack,
	265	tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_PAIR],
	266	"invalid pair parameter");
	267	return -EINVAL;
	268	}
f2bc8ad3 AL	269	}
	270
	271	if (cfg->first > MAX_CABLE_LENGTH_CM) {
	272	NL_SET_ERR_MSG_ATTR(info->extack,
	273	tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_FIRST],
	274	"invalid first parameter");
	275	return -EINVAL;
	276	}
	277
	278	if (cfg->last > MAX_CABLE_LENGTH_CM) {
	279	NL_SET_ERR_MSG_ATTR(info->extack,
	280	tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_LAST],
	281	"invalid last parameter");
	282	return -EINVAL;
	283	}
	284
	285	if (cfg->first > cfg->last) {
	286	NL_SET_ERR_MSG(info->extack, "invalid first/last parameter");
	287	return -EINVAL;
	288	}
	289
	290	if (!cfg->step) {
	291	NL_SET_ERR_MSG_ATTR(info->extack,
	292	tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP],
	293	"invalid step parameter");
	294	return -EINVAL;
	295	}
	296
	297	if (cfg->step > (cfg->last - cfg->first)) {
	298	NL_SET_ERR_MSG_ATTR(info->extack,
	299	tb[ETHTOOL_A_CABLE_TEST_TDR_CFG_STEP],
	300	"step parameter too big");
	301	return -EINVAL;
	302	}
	303
	304	return 0;
	305	}
	306
1a644de2 AL	307	int ethnl_act_cable_test_tdr(struct sk_buff skb, struct genl_info info)
1a644de2 AL	308	{
1a644de2	309	struct ethnl_req_info req_info = {};
f3631ab0	310	const struct ethtool_phy_ops *ops;
5028588b	311	struct nlattr **tb = info->attrs;
f2bc8ad3	312	struct phy_tdr_config cfg;
1a644de2 AL	313	struct net_device *dev;
	314	int ret;
	315
1a644de2 AL	316	ret = ethnl_parse_header_dev_get(&req_info,
	317	tb[ETHTOOL_A_CABLE_TEST_TDR_HEADER],
	318	genl_info_net(info), info->extack,
	319	true);
	320	if (ret < 0)
	321	return ret;
	322
	323	dev = req_info.dev;
	324	if (!dev->phydev) {
	325	ret = -EOPNOTSUPP;
	326	goto out_dev_put;
	327	}
	328
f2bc8ad3 AL	329	ret = ethnl_act_cable_test_tdr_cfg(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG],
	330	info, &cfg);
	331	if (ret)
	332	goto out_dev_put;
	333
1a644de2	334	rtnl_lock();
f3631ab0 FF	335	ops = ethtool_phy_ops;
	336	if (!ops \|\| !ops->start_cable_test_tdr) {
	337	ret = -EOPNOTSUPP;
	338	goto out_rtnl;
	339	}
	340
1a644de2 AL	341	ret = ethnl_ops_begin(dev);
	342	if (ret < 0)
	343	goto out_rtnl;
	344
f3631ab0	345	ret = ops->start_cable_test_tdr(dev->phydev, info->extack, &cfg);
1a644de2 AL	346
	347	ethnl_ops_complete(dev);
	348
	349	if (!ret)
	350	ethnl_cable_test_started(dev->phydev,
	351	ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
	352
	353	out_rtnl:
	354	rtnl_unlock();
	355	out_dev_put:
34ac17ec	356	ethnl_parse_header_dev_put(&req_info);
1a644de2 AL	357	return ret;
1a644de2 AL	358	}
aa246499	359
6b4a0fc1 AL	360	int ethnl_cable_test_amplitude(struct phy_device *phydev,
	361	u8 pair, s16 mV)
	362	{
	363	struct nlattr *nest;
	364	int ret = -EMSGSIZE;
	365
	366	nest = nla_nest_start(phydev->skb,
	367	ETHTOOL_A_CABLE_TDR_NEST_AMPLITUDE);
	368	if (!nest)
	369	return -EMSGSIZE;
	370
	371	if (nla_put_u8(phydev->skb, ETHTOOL_A_CABLE_AMPLITUDE_PAIR, pair))
	372	goto err;
	373	if (nla_put_u16(phydev->skb, ETHTOOL_A_CABLE_AMPLITUDE_mV, mV))
	374	goto err;
	375
	376	nla_nest_end(phydev->skb, nest);
	377	return 0;
	378
	379	err:
	380	nla_nest_cancel(phydev->skb, nest);
	381	return ret;
	382	}
	383	EXPORT_SYMBOL_GPL(ethnl_cable_test_amplitude);
	384
	385	int ethnl_cable_test_pulse(struct phy_device *phydev, u16 mV)
	386	{
	387	struct nlattr *nest;
	388	int ret = -EMSGSIZE;
	389
	390	nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_TDR_NEST_PULSE);
	391	if (!nest)
	392	return -EMSGSIZE;
	393
	394	if (nla_put_u16(phydev->skb, ETHTOOL_A_CABLE_PULSE_mV, mV))
	395	goto err;
	396
	397	nla_nest_end(phydev->skb, nest);
	398	return 0;
	399
	400	err:
	401	nla_nest_cancel(phydev->skb, nest);
	402	return ret;
	403	}
	404	EXPORT_SYMBOL_GPL(ethnl_cable_test_pulse);
	405
	406	int ethnl_cable_test_step(struct phy_device *phydev, u32 first, u32 last,
	407	u32 step)
	408	{
	409	struct nlattr *nest;
	410	int ret = -EMSGSIZE;
	411
	412	nest = nla_nest_start(phydev->skb, ETHTOOL_A_CABLE_TDR_NEST_STEP);
	413	if (!nest)
	414	return -EMSGSIZE;
	415
	416	if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_FIRST_DISTANCE,
	417	first))
	418	goto err;
	419
	420	if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_LAST_DISTANCE, last))
	421	goto err;
	422
	423	if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_STEP_STEP_DISTANCE, step))
424	goto err;
425
426	nla_nest_end(phydev->skb, nest);
427	return 0;
428
429	err:
430	nla_nest_cancel(phydev->skb, nest);
431	return ret;
432	}
433	EXPORT_SYMBOL_GPL(ethnl_cable_test_step);