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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/phy.h>#include <linux/ethtool_netlink.h>#include <net/netdev_lock.h>
#include "common.h"#include "netlink.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_phy),};
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 phy_device *phydev; 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;
netdev_lock_ops_compat(dev); phydev = ethnl_req_get_phydev(&req_info, tb, ETHTOOL_A_CABLE_TEST_HEADER, info->extack); if (IS_ERR_OR_NULL(phydev)) { ret = -EOPNOTSUPP; goto out_unlock; }
ops = ethtool_phy_ops; if (!ops || !ops->start_cable_test) { ret = -EOPNOTSUPP; goto out_unlock; }
ret = ethnl_ops_begin(dev); if (ret < 0) goto out_unlock;
ret = ops->start_cable_test(phydev, info->extack);
ethnl_ops_complete(dev);
if (!ret) ethnl_cable_test_started(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
out_unlock: netdev_unlock_ops_compat(dev); 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_with_src(struct phy_device *phydev, u8 pair, u8 result, u32 src){ 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; if (src != ETHTOOL_A_CABLE_INF_SRC_UNSPEC) { if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_RESULT_SRC, src)) 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_with_src);
int ethnl_cable_test_fault_length_with_src(struct phy_device *phydev, u8 pair, u32 cm, u32 src){ 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; if (src != ETHTOOL_A_CABLE_INF_SRC_UNSPEC) { if (nla_put_u32(phydev->skb, ETHTOOL_A_CABLE_FAULT_LENGTH_SRC, src)) 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_with_src);
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_phy), [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_device *phydev; 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;
ret = ethnl_act_cable_test_tdr_cfg(tb[ETHTOOL_A_CABLE_TEST_TDR_CFG], info, &cfg); if (ret) goto out_dev_put;
netdev_lock_ops_compat(dev); phydev = ethnl_req_get_phydev(&req_info, tb, ETHTOOL_A_CABLE_TEST_TDR_HEADER, info->extack); if (IS_ERR_OR_NULL(phydev)) { ret = -EOPNOTSUPP; goto out_unlock; }
ops = ethtool_phy_ops; if (!ops || !ops->start_cable_test_tdr) { ret = -EOPNOTSUPP; goto out_unlock; }
ret = ethnl_ops_begin(dev); if (ret < 0) goto out_unlock;
ret = ops->start_cable_test_tdr(phydev, info->extack, &cfg);
ethnl_ops_complete(dev);
if (!ret) ethnl_cable_test_started(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
out_unlock: netdev_unlock_ops_compat(dev);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);