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Message-Id: <20200517195851.610435-3-andrew@lunn.ch>
Date: Sun, 17 May 2020 21:58:46 +0200
From: Andrew Lunn <andrew@...n.ch>
To: David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Florian Fainelli <f.fainelli@...il.com>,
Heiner Kallweit <hkallweit1@...il.com>,
Chris Healy <cphealy@...il.com>,
Michal Kubecek <mkubecek@...e.cz>, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next 2/7] net: ethtool: Add generic parts of cable test TDR
Add the generic parts of the code used to trigger a cable test and
return raw TDR data. Any PHY driver which support this must implement
the new driver op.
Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
drivers/net/phy/phy.c | 65 ++++++++++++++++++++++++++++++++-
include/linux/ethtool_netlink.h | 4 +-
include/linux/phy.h | 13 +++++++
net/ethtool/cabletest.c | 65 ++++++++++++++++++++++++++++++---
net/ethtool/netlink.c | 5 +++
net/ethtool/netlink.h | 1 +
6 files changed, 144 insertions(+), 9 deletions(-)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index d4bbf79dab6c..1f794c1716cf 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -519,7 +519,7 @@ int phy_start_cable_test(struct phy_device *phydev,
goto out;
}
- err = ethnl_cable_test_alloc(phydev);
+ err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
if (err)
goto out;
@@ -552,6 +552,69 @@ int phy_start_cable_test(struct phy_device *phydev,
}
EXPORT_SYMBOL(phy_start_cable_test);
+int phy_start_cable_test_tdr(struct phy_device *phydev,
+ struct netlink_ext_ack *extack)
+{
+ struct net_device *dev = phydev->attached_dev;
+ int err = -ENOMEM;
+
+ if (!(phydev->drv &&
+ phydev->drv->cable_test_tdr_start &&
+ phydev->drv->cable_test_get_status)) {
+ NL_SET_ERR_MSG(extack,
+ "PHY driver does not support cable test TDR");
+ return -EOPNOTSUPP;
+ }
+
+ mutex_lock(&phydev->lock);
+ if (phydev->state == PHY_CABLETEST) {
+ NL_SET_ERR_MSG(extack,
+ "PHY already performing a test");
+ err = -EBUSY;
+ goto out;
+ }
+
+ if (phydev->state < PHY_UP ||
+ phydev->state > PHY_CABLETEST) {
+ NL_SET_ERR_MSG(extack,
+ "PHY not configured. Try setting interface up");
+ err = -EBUSY;
+ goto out;
+ }
+
+ err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
+ if (err)
+ goto out;
+
+ /* Mark the carrier down until the test is complete */
+ phy_link_down(phydev, true);
+
+ netif_testing_on(dev);
+ err = phydev->drv->cable_test_tdr_start(phydev);
+ if (err) {
+ netif_testing_off(dev);
+ phy_link_up(phydev);
+ goto out_free;
+ }
+
+ phydev->state = PHY_CABLETEST;
+
+ if (phy_polling_mode(phydev))
+ phy_trigger_machine(phydev);
+
+ mutex_unlock(&phydev->lock);
+
+ return 0;
+
+out_free:
+ ethnl_cable_test_free(phydev);
+out:
+ mutex_unlock(&phydev->lock);
+
+ return err;
+}
+EXPORT_SYMBOL(phy_start_cable_test_tdr);
+
static int phy_config_aneg(struct phy_device *phydev)
{
if (phydev->drv->config_aneg)
diff --git a/include/linux/ethtool_netlink.h b/include/linux/ethtool_netlink.h
index e317fc99565e..24817ba252a0 100644
--- a/include/linux/ethtool_netlink.h
+++ b/include/linux/ethtool_netlink.h
@@ -17,13 +17,13 @@ enum ethtool_multicast_groups {
struct phy_device;
#if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
-int ethnl_cable_test_alloc(struct phy_device *phydev);
+int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd);
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);
#else
-static inline int ethnl_cable_test_alloc(struct phy_device *phydev)
+static inline int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
{
return -EOPNOTSUPP;
}
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 5d8ff5428010..c35d45fe74ce 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -705,6 +705,10 @@ struct phy_driver {
/* Start a cable test */
int (*cable_test_start)(struct phy_device *dev);
+
+ /* Start a raw TDR cable test */
+ int (*cable_test_tdr_start)(struct phy_device *dev);
+
/* Once per second, or on interrupt, request the status of the
* test.
*/
@@ -1255,6 +1259,8 @@ int phy_reset_after_clk_enable(struct phy_device *phydev);
#if IS_ENABLED(CONFIG_PHYLIB)
int phy_start_cable_test(struct phy_device *phydev,
struct netlink_ext_ack *extack);
+int phy_start_cable_test_tdr(struct phy_device *phydev,
+ struct netlink_ext_ack *extack);
#else
static inline
int phy_start_cable_test(struct phy_device *phydev,
@@ -1263,6 +1269,13 @@ int phy_start_cable_test(struct phy_device *phydev,
NL_SET_ERR_MSG(extack, "Kernel not compiled with PHYLIB support");
return -EOPNOTSUPP;
}
+static inline
+int phy_start_cable_test_tdr(struct phy_device *phydev,
+ struct netlink_ext_ack *extack)
+{
+ NL_SET_ERR_MSG(extack, "Kernel not compiled with PHYLIB support");
+ return -EOPNOTSUPP;
+}
#endif
int phy_cable_test_result(struct phy_device *phydev, u8 pair, u16 result);
diff --git a/net/ethtool/cabletest.c b/net/ethtool/cabletest.c
index 5ba06eabe8c2..44dc4b8e26ac 100644
--- a/net/ethtool/cabletest.c
+++ b/net/ethtool/cabletest.c
@@ -13,7 +13,7 @@ cable_test_act_policy[ETHTOOL_A_CABLE_TEST_MAX + 1] = {
[ETHTOOL_A_CABLE_TEST_HEADER] = { .type = NLA_NESTED },
};
-static int ethnl_cable_test_started(struct phy_device *phydev)
+static int ethnl_cable_test_started(struct phy_device *phydev, u8 cmd)
{
struct sk_buff *skb;
int err = -ENOMEM;
@@ -23,7 +23,7 @@ static int ethnl_cable_test_started(struct phy_device *phydev)
if (!skb)
goto out;
- ehdr = ethnl_bcastmsg_put(skb, ETHTOOL_MSG_CABLE_TEST_NTF);
+ ehdr = ethnl_bcastmsg_put(skb, cmd);
if (!ehdr) {
err = -EMSGSIZE;
goto out;
@@ -86,7 +86,8 @@ int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info)
ethnl_ops_complete(dev);
if (!ret)
- ethnl_cable_test_started(dev->phydev);
+ ethnl_cable_test_started(dev->phydev,
+ ETHTOOL_MSG_CABLE_TEST_NTF);
out_rtnl:
rtnl_unlock();
@@ -95,7 +96,7 @@ int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info)
return ret;
}
-int ethnl_cable_test_alloc(struct phy_device *phydev)
+int ethnl_cable_test_alloc(struct phy_device *phydev, u8 cmd)
{
int err = -ENOMEM;
@@ -103,8 +104,7 @@ int ethnl_cable_test_alloc(struct phy_device *phydev)
if (!phydev->skb)
goto out;
- phydev->ehdr = ethnl_bcastmsg_put(phydev->skb,
- ETHTOOL_MSG_CABLE_TEST_NTF);
+ phydev->ehdr = ethnl_bcastmsg_put(phydev->skb, cmd);
if (!phydev->ehdr) {
err = -EMSGSIZE;
goto out;
@@ -199,3 +199,56 @@ int ethnl_cable_test_fault_length(struct phy_device *phydev, u8 pair, u32 cm)
return ret;
}
EXPORT_SYMBOL_GPL(ethnl_cable_test_fault_length);
+
+static const struct nla_policy
+cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1] = {
+ [ETHTOOL_A_CABLE_TEST_TDR_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CABLE_TEST_TDR_HEADER] = { .type = NLA_NESTED },
+};
+
+int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *tb[ETHTOOL_A_CABLE_TEST_TDR_MAX + 1];
+ struct ethnl_req_info req_info = {};
+ struct net_device *dev;
+ int ret;
+
+ ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
+ ETHTOOL_A_CABLE_TEST_TDR_MAX,
+ cable_test_tdr_act_policy, info->extack);
+ if (ret < 0)
+ return 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;
+ }
+
+ rtnl_lock();
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out_rtnl;
+
+ ret = phy_start_cable_test_tdr(dev->phydev, info->extack);
+
+ 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:
+ dev_put(dev);
+ return ret;
+}
+
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 87bc02da74bc..b236b0d6cccf 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -844,6 +844,11 @@ static const struct genl_ops ethtool_genl_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_act_cable_test,
},
+ {
+ .cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_act_cable_test_tdr,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index b0eb5d920099..9a96b6e90dc2 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -360,5 +360,6 @@ int ethnl_set_coalesce(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_eee(struct sk_buff *skb, struct genl_info *info);
int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info);
+int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info);
#endif /* _NET_ETHTOOL_NETLINK_H */
--
2.26.2
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