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Message-ID: <20240829174342.3255168-3-kuba@kernel.org>
Date: Thu, 29 Aug 2024 10:43:42 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
edumazet@...gle.com,
pabeni@...hat.com,
Jakub Kicinski <kuba@...nel.org>,
corbet@....net,
andrew@...n.ch,
hkallweit1@...il.com,
linux@...linux.org.uk,
ecree.xilinx@...il.com,
przemyslaw.kitszel@...el.com,
kory.maincent@...tlin.com,
maxime.chevallier@...tlin.com,
linux-doc@...r.kernel.org
Subject: [RFC net-next 2/2] net: ethtool: add phy(dev) specific stats over netlink
Define a way of getting PHY stats over the netlink API.
According to my limited understanding of PHYs they are more
standard-based than the rest of a network interface, so hopefully
these stats can be extended to cover most cases.
There's a bit of strategic ambiguity between phy and phydev
here, in case some integrated device wants to use these later.
But the new group is separate from eth-phy which is reserved
for IEEE stats.
Oleksij, if this patch works you can add the OA stats into
struct ethtool_phy_stats or struct ethtool_link_ext_stats.
They should show up in ethtool -S eth0 --all-groups
for the former or in ethtool -I eth0 for the latter.
Note link_stats need changes to ethtool CLI, but
they seem better suited for the stats based on their names?
There's a minor TODO for you to define the semantics
of the error counter, based on however the DP83TG720 PHY
behaves.
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: corbet@....net
CC: andrew@...n.ch
CC: hkallweit1@...il.com
CC: linux@...linux.org.uk
CC: ecree.xilinx@...il.com
CC: przemyslaw.kitszel@...el.com
CC: kory.maincent@...tlin.com
CC: maxime.chevallier@...tlin.com
CC: linux-doc@...r.kernel.org
---
Documentation/networking/ethtool-netlink.rst | 1 +
include/linux/ethtool.h | 15 +++++++
include/linux/phy.h | 3 +-
include/uapi/linux/ethtool.h | 2 +
include/uapi/linux/ethtool_netlink.h | 15 +++++++
net/ethtool/netlink.h | 1 +
net/ethtool/stats.c | 43 +++++++++++++++++++-
net/ethtool/strset.c | 5 +++
8 files changed, 82 insertions(+), 3 deletions(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index ba90457b8b2d..7f6c23644645 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -1608,6 +1608,7 @@ Users specify which groups of statistics they are requesting via
ETHTOOL_STATS_ETH_PHY eth-phy Basic IEEE 802.3 PHY statistics (30.3.2.1.*)
ETHTOOL_STATS_ETH_CTRL eth-ctrl Basic IEEE 802.3 MAC Ctrl statistics (30.3.3.*)
ETHTOOL_STATS_RMON rmon RMON (RFC 2819) statistics
+ ETHTOOL_STATS_PHY phy Additional PHY statistics, not defined by IEEE
====================== ======== ===============================================
Each group should have a corresponding ``ETHTOOL_A_STATS_GRP`` in the reply.
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 12f6dc567598..0a09ea82e001 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -412,6 +412,21 @@ struct ethtool_eth_phy_stats {
);
};
+/* Additional PHY statistics, not defined by IEEE */
+struct ethtool_phy_stats {
+ /* Basic packet / byte counters are meant for PHY drivers */
+ u64 rx_packets;
+ u64 rx_bytes;
+ u64 rx_error; /* TODO: we need to define here whether packet
+ * counted here is also counted as rx_packets,
+ * and whether it's passed to the MAC with some
+ * error indication or MAC never sees it.
+ */
+ u64 tx_packets;
+ u64 tx_bytes;
+ u64 tx_error; /* TODO: same as for rx */
+};
+
/* Basic IEEE 802.3 MAC Ctrl statistics (30.3.3.*), not otherwise exposed
* via a more targeted API.
*/
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 53942fd7760f..9c3094706c7a 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1097,7 +1097,8 @@ struct phy_driver {
* must only set statistics which are actually collected by the device.
*/
void (*get_phy_stats)(struct phy_device *dev,
- struct ethtool_eth_phy_stats *eth_stats);
+ struct ethtool_eth_phy_stats *eth_stats,
+ struct ethtool_phy_stats *stats);
void (*get_link_stats)(struct phy_device *dev,
struct ethtool_link_ext_stats *link_stats);
/** @get_sset_count: Number of statistic counters */
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index c405ed63acfa..977c5a8a0d6b 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -681,6 +681,7 @@ enum ethtool_link_ext_substate_module {
* @ETH_SS_STATS_ETH_MAC: names of IEEE 802.3 MAC statistics
* @ETH_SS_STATS_ETH_CTRL: names of IEEE 802.3 MAC Control statistics
* @ETH_SS_STATS_RMON: names of RMON statistics
+ * @ETH_SS_STATS_PHY: names of PHY(dev) statistics
*
* @ETH_SS_COUNT: number of defined string sets
*/
@@ -706,6 +707,7 @@ enum ethtool_stringset {
ETH_SS_STATS_ETH_MAC,
ETH_SS_STATS_ETH_CTRL,
ETH_SS_STATS_RMON,
+ ETH_SS_STATS_PHY,
/* add new constants above here */
ETH_SS_COUNT
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 283305f6b063..dc332f8aa3a6 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -820,6 +820,7 @@ enum {
ETHTOOL_STATS_ETH_MAC,
ETHTOOL_STATS_ETH_CTRL,
ETHTOOL_STATS_RMON,
+ ETHTOOL_STATS_PHY,
/* add new constants above here */
__ETHTOOL_STATS_CNT
@@ -935,6 +936,20 @@ enum {
ETHTOOL_A_STATS_RMON_MAX = (__ETHTOOL_A_STATS_RMON_CNT - 1)
};
+enum {
+ /* Basic packet counters if PHY has separate counters from the MAC */
+ ETHTOOL_A_STATS_PHY_RX_PKTS,
+ ETHTOOL_A_STATS_PHY_RX_BYTES,
+ ETHTOOL_A_STATS_PHY_RX_ERRORS,
+ ETHTOOL_A_STATS_PHY_TX_PKTS,
+ ETHTOOL_A_STATS_PHY_TX_BYTES,
+ ETHTOOL_A_STATS_PHY_TX_ERRORS,
+
+ /* add new constants above here */
+ __ETHTOOL_A_STATS_PHY_CNT,
+ ETHTOOL_A_STATS_PHY_MAX = (__ETHTOOL_A_STATS_PHY_CNT - 1)
+};
+
/* MODULE */
enum {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 203b08eb6c6f..3a6ecdcb5b8c 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -505,5 +505,6 @@ extern const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING
extern const char stats_eth_mac_names[__ETHTOOL_A_STATS_ETH_MAC_CNT][ETH_GSTRING_LEN];
extern const char stats_eth_ctrl_names[__ETHTOOL_A_STATS_ETH_CTRL_CNT][ETH_GSTRING_LEN];
extern const char stats_rmon_names[__ETHTOOL_A_STATS_RMON_CNT][ETH_GSTRING_LEN];
+extern const char stats_phy_names[__ETHTOOL_A_STATS_PHY_CNT][ETH_GSTRING_LEN];
#endif /* _NET_ETHTOOL_NETLINK_H */
diff --git a/net/ethtool/stats.c b/net/ethtool/stats.c
index cf802b1cda6f..8ae3c57cea21 100644
--- a/net/ethtool/stats.c
+++ b/net/ethtool/stats.c
@@ -22,6 +22,7 @@ struct stats_reply_data {
struct ethtool_eth_mac_stats mac_stats;
struct ethtool_eth_ctrl_stats ctrl_stats;
struct ethtool_rmon_stats rmon_stats;
+ struct ethtool_phy_stats phydev_stats;
);
const struct ethtool_rmon_hist_range *rmon_ranges;
};
@@ -34,6 +35,7 @@ const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN] = {
[ETHTOOL_STATS_ETH_MAC] = "eth-mac",
[ETHTOOL_STATS_ETH_CTRL] = "eth-ctrl",
[ETHTOOL_STATS_RMON] = "rmon",
+ [ETHTOOL_STATS_PHY] = "phydev",
};
const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN] = {
@@ -78,6 +80,15 @@ const char stats_rmon_names[__ETHTOOL_A_STATS_RMON_CNT][ETH_GSTRING_LEN] = {
[ETHTOOL_A_STATS_RMON_JABBER] = "etherStatsJabbers",
};
+const char stats_phy_names[__ETHTOOL_A_STATS_PHY_CNT][ETH_GSTRING_LEN] = {
+ [ETHTOOL_A_STATS_PHY_RX_PKTS] = "RxFrames",
+ [ETHTOOL_A_STATS_PHY_RX_BYTES] = "RxOctets",
+ [ETHTOOL_A_STATS_PHY_RX_ERRORS] = "RxErrors",
+ [ETHTOOL_A_STATS_PHY_TX_PKTS] = "TxFrames",
+ [ETHTOOL_A_STATS_PHY_TX_BYTES] = "TxOctets",
+ [ETHTOOL_A_STATS_PHY_TX_ERRORS] = "TxErrors",
+};
+
const struct nla_policy ethnl_stats_get_policy[ETHTOOL_A_STATS_SRC + 1] = {
[ETHTOOL_A_STATS_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
@@ -123,7 +134,8 @@ ethtool_get_phydev_stats(struct net_device *dev, struct stats_reply_data *data)
return;
mutex_lock(&phydev->lock);
- phydev->drv->get_phy_stats(phydev, &data->phy_stats);
+ phydev->drv->get_phy_stats(phydev, &data->phy_stats,
+ &data->phydev_stats);
mutex_unlock(&phydev->lock);
}
@@ -160,7 +172,8 @@ static int stats_prepare_data(const struct ethnl_req_info *req_base,
data->ctrl_stats.src = src;
data->rmon_stats.src = src;
- if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask) &&
+ if ((test_bit(ETHTOOL_STATS_PHY, req_info->stat_mask) ||
+ test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask)) &&
src == ETHTOOL_MAC_STATS_SRC_AGGREGATE)
ethtool_get_phydev_stats(dev, data);
@@ -213,6 +226,10 @@ static int stats_reply_size(const struct ethnl_req_info *req_base,
nla_total_size(4)) * /* _A_STATS_GRP_HIST_BKT_HI */
ETHTOOL_RMON_HIST_MAX * 2;
}
+ if (test_bit(ETHTOOL_STATS_PHY, req_info->stat_mask)) {
+ n_stats += sizeof(struct ethtool_phy_stats) / sizeof(u64);
+ n_grps++;
+ }
len += n_grps * (nla_total_size(0) + /* _A_STATS_GRP */
nla_total_size(4) + /* _A_STATS_GRP_ID */
@@ -266,6 +283,25 @@ static int stats_put_phy_stats(struct sk_buff *skb,
return 0;
}
+static int stats_put_phydev_stats(struct sk_buff *skb,
+ const struct stats_reply_data *data)
+{
+ if (stat_put(skb, ETHTOOL_A_STATS_PHY_RX_PKTS,
+ data->phydev_stats.rx_packets) ||
+ stat_put(skb, ETHTOOL_A_STATS_PHY_RX_BYTES,
+ data->phydev_stats.rx_packets) ||
+ stat_put(skb, ETHTOOL_A_STATS_PHY_RX_ERRORS,
+ data->phydev_stats.rx_packets) ||
+ stat_put(skb, ETHTOOL_A_STATS_PHY_TX_PKTS,
+ data->phydev_stats.rx_packets) ||
+ stat_put(skb, ETHTOOL_A_STATS_PHY_TX_BYTES,
+ data->phydev_stats.rx_packets) ||
+ stat_put(skb, ETHTOOL_A_STATS_PHY_TX_ERRORS,
+ data->phydev_stats.rx_packets))
+ return -EMSGSIZE;
+ return 0;
+}
+
static int stats_put_mac_stats(struct sk_buff *skb,
const struct stats_reply_data *data)
{
@@ -442,6 +478,9 @@ static int stats_fill_reply(struct sk_buff *skb,
if (!ret && test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask))
ret = stats_put_stats(skb, data, ETHTOOL_STATS_RMON,
ETH_SS_STATS_RMON, stats_put_rmon_stats);
+ if (!ret && test_bit(ETHTOOL_STATS_PHY, req_info->stat_mask))
+ ret = stats_put_stats(skb, data, ETHTOOL_STATS_PHY,
+ ETH_SS_STATS_PHY, stats_put_phydev_stats);
return ret;
}
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index b3382b3cf325..818cf01f0911 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -105,6 +105,11 @@ static const struct strset_info info_template[] = {
.count = __ETHTOOL_A_STATS_RMON_CNT,
.strings = stats_rmon_names,
},
+ [ETH_SS_STATS_PHY] = {
+ .per_dev = false,
+ .count = __ETHTOOL_A_STATS_PHY_CNT,
+ .strings = stats_phy_names,
+ },
};
struct strset_req_info {
--
2.46.0
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