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authorAndrew Lunn <andrew@lunn.ch>2020-05-27 01:21:39 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-27 09:22:20 +0300
commit6b4a0fc106521e480c00b55a7ef38c89f02dc4e8 (patch)
tree8ba3c8943db4aaafef9e2388207c6ed921b7927f
parent1a644de29f712771c2ec00e52caa391544eb6141 (diff)
downloadlinux-6b4a0fc106521e480c00b55a7ef38c89f02dc4e8.tar.xz
net: ethtool: Add helpers for cable test TDR data
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>
-rw-r--r--include/linux/ethtool_netlink.h21
-rw-r--r--net/ethtool/cabletest.c80
2 files changed, 100 insertions, 1 deletions
diff --git a/include/linux/ethtool_netlink.h b/include/linux/ethtool_netlink.h
index 24817ba252a0..8fbe4f97ffad 100644
--- a/include/linux/ethtool_netlink.h
+++ b/include/linux/ethtool_netlink.h
@@ -22,6 +22,10 @@ void ethnl_cable_test_free(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_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
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;
}
+
+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 /* _LINUX_ETHTOOL_NETLINK_H_ */
diff --git a/net/ethtool/cabletest.c b/net/ethtool/cabletest.c
index 94e9d5f04353..390d0673ff01 100644
--- a/net/ethtool/cabletest.c
+++ b/net/ethtool/cabletest.c
@@ -100,7 +100,10 @@ int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
{
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)
goto out;
@@ -251,3 +254,78 @@ out_dev_put:
dev_put(dev);
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);