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net: ethtool: Add helpers for cable test TDR data

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Add helpers for returning raw TDR helpers in netlink messages.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrew Lunn
2020-05-27 00:21:39 +02:00
committed by David S. Miller
parent 1a644de29f
commit 6b4a0fc106
2 changed files with 100 additions and 1 deletions
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21
include/linux/ethtool_netlink.h
View File

@@ -22,6 +22,10 @@ void ethnl_cable_test_free(struct phy_device *phydev);
void ethnl_cable_test_finished(struct phy_device *phydev); void ethnl_cable_test_finished(struct phy_device *phydev);
int ethnl_cable_test_result(struct phy_device *phydev, u8 pair, u8 result); int ethnl_cable_test_result(struct phy_device *phydev, u8 pair, u8 result);
int ethnl_cable_test_fault_length(struct phy_device *phydev, u8 pair, u32 cm); int ethnl_cable_test_fault_length(struct phy_device *phydev, u8 pair, u32 cm);
int ethnl_cable_test_amplitude(struct phy_device *phydev, u8 pair, s16 mV);
int ethnl_cable_test_pulse(struct phy_device *phydev, u16 mV);
int ethnl_cable_test_step(struct phy_device *phydev, u32 first, u32 last,
u32 step);
#else #else
static inline int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd) static inline int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
{ {
@@ -46,5 +50,22 @@ static inline int ethnl_cable_test_fault_length(struct phy_device *phydev,
{ {
return -EOPNOTSUPP; return -EOPNOTSUPP;
} }
static inline int ethnl_cable_test_amplitude(struct phy_device *phydev,
u8 pair, s16 mV)
{
return -EOPNOTSUPP;
}
static inline int ethnl_cable_test_pulse(struct phy_device *phydev, u16 mV)
{
return -EOPNOTSUPP;
}
static inline int ethnl_cable_test_step(struct phy_device *phydev, u32 first,
u32 last, u32 step)
{
return -EOPNOTSUPP;
}
#endif /* IS_ENABLED(ETHTOOL_NETLINK) */ #endif /* IS_ENABLED(ETHTOOL_NETLINK) */
#endif /* _LINUX_ETHTOOL_NETLINK_H_ */ #endif /* _LINUX_ETHTOOL_NETLINK_H_ */

80
net/ethtool/cabletest.c
View File

@@ -100,7 +100,10 @@ int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
{ {
int err = -ENOMEM; int err = -ENOMEM;
phydev->skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); /* 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) if (!phydev->skb)
goto out; goto out;
@@ -251,3 +254,78 @@ out_dev_put:
dev_put(dev); dev_put(dev);
return ret; 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);