[PATCH RFC net-next v8 12/13] net: ethtool: tsinfo: Add support for hwtstamp provider and get/set hwtstamp config

Kory Maincent
2024-02-16T15:53:12Z

Enhance 'get' command to retrieve tsinfo of hwtstamp providers within a
network topology and read current hwtstamp configuration.

Introduce support for ETHTOOL_MSG_TSINFO_SET ethtool netlink socket to
configure hwtstamp of a PHC provider. Note that simultaneous hwtstamp
isn't supported; configuring a new one disables the previous setting.

Also, add support for a specific dump command to retrieve all hwtstamp
providers within the network topology, with added functionality for
filtered dump to target a single interface.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
---

Pointer attached_dev is used to know if the phy is on the net topology.
This might not be enough and might need Maxime Chevallier link topology
patch series:
https://lore.kernel.org/netdev/20240213150431.1796171-1-maxime.chevallier@bootlin.com/

Change in v8:
- New patch
---
drivers/ptp/ptp_clock.c | 45 +++
include/linux/ethtool.h | 4 +
include/linux/netdevice.h | 2 +
include/linux/ptp_clock_kernel.h | 32 ++
include/uapi/linux/ethtool_netlink.h | 12 +
include/uapi/linux/net_tstamp.h | 3 +-
net/core/dev.c | 23 ++
net/ethtool/common.c | 31 ++
net/ethtool/common.h | 3 +
net/ethtool/netlink.c | 14 +-
net/ethtool/netlink.h | 6 +-
net/ethtool/tsinfo.c | 604 +++++++++++++++++++++++++++++++++--
12 files changed, 756 insertions(+), 23 deletions(-)

diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index d7cd7e01990e..ccb81d49d2eb 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -575,6 +575,51 @@ struct ptp_clock *ptp_clock_get_by_index(int index)
}
EXPORT_SYMBOL(ptp_clock_get_by_index);

+struct ptp_clock *netdev_ptp_clock_find(struct net_device *dev,
+ unsigned long *indexp)
+{
+ struct ptp_clock *ptp;
+ unsigned long index;
+
+ xa_for_each_start(&ptp_clocks_map, index, ptp, *indexp) {
+ if ((ptp->phc_source == HWTSTAMP_SOURCE_NETDEV &&
+ ptp->netdev == dev) ||
+ (ptp->phc_source == HWTSTAMP_SOURCE_PHYLIB &&
+ ptp->phydev->attached_dev == dev)) {
+ *indexp = index;
+ return ptp;
+ }
+ }
+
+ return NULL;
+};
+EXPORT_SYMBOL(netdev_ptp_clock_find);
+
+bool netdev_support_hwtstamp(struct net_device *dev,
+ struct hwtstamp_provider *hwtst)
+{
+ struct ptp_clock *tmp_ptp;
+ unsigned long index = 0;
+
+ netdev_for_each_ptp_clock_start(dev, index, tmp_ptp, 0) {
+ if (tmp_ptp != hwtst->ptp)
+ continue;
+
+ if (ptp_clock_from_phylib(hwtst->ptp) &&
+ hwtst->qualifier == HWTSTAMP_PROVIDER_QUALIFIER_PRECISE)
+ return true;
+
+ if (ptp_clock_from_netdev(hwtst->ptp) &&
+ dev_support_hwtstamp_qualifier(dev, hwtst->qualifier))
+ return true;
+
+ return false;
+ }
+
+ return false;
+}
+EXPORT_SYMBOL(netdev_support_hwtstamp);
+
/* module operations */

static void __exit ptp_exit(void)
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index f74190a8d9ee..5a00873bef48 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -650,6 +650,7 @@ struct ethtool_rxfh_param {
* @cmd: command number = %ETHTOOL_GET_TS_INFO
* @so_timestamping: bit mask of the sum of the supported SO_TIMESTAMPING flags
* @phc_index: device index of the associated PHC, or -1 if there is none
+ * @phc_qualifier: qualifier of the associated PHC
* @tx_types: bit mask of the supported hwtstamp_tx_types enumeration values
* @rx_filters: bit mask of the supported hwtstamp_rx_filters enumeration values
*/
@@ -657,6 +658,7 @@ struct kernel_ethtool_ts_info {
u32 cmd;
u32 so_timestamping;
int phc_index;
+ enum hwtstamp_provider_qualifier phc_qualifier;
enum hwtstamp_tx_types tx_types;
enum hwtstamp_rx_filters rx_filters;
};
@@ -671,6 +673,7 @@ struct kernel_ethtool_ts_info {
* RSS.
* @supported_coalesce_params: supported types of interrupt coalescing.
* @supported_ring_params: supported ring params.
+ * @supported_hwtstamp_qualifier: bitfield of supported hwtstamp qualifier.
* @get_drvinfo: Report driver/device information. Modern drivers no
* longer have to implement this callback. Most fields are
* correctly filled in by the core using system information, or
@@ -851,6 +854,7 @@ struct ethtool_ops {
u32 cap_rss_sym_xor_supported:1;
u32 supported_coalesce_params;
u32 supported_ring_params;
+ u32 supported_hwtstamp_qualifiers;
void (*get_drvinfo)(struct net_device *, struct ethtool_drvinfo *);
int (*get_regs_len)(struct net_device *);
void (*get_regs)(struct net_device *, struct ethtool_regs *, void *);
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 583a18ed83d9..079c960dc97c 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -4013,6 +4013,8 @@ int dev_set_hwtstamp_phylib(struct net_device *dev,
struct netlink_ext_ack *extack);
int dev_get_hwtstamp_phylib(struct net_device *dev,
struct kernel_hwtstamp_config *cfg);
+bool dev_support_hwtstamp_qualifier(struct net_device *dev,
+ enum hwtstamp_provider_qualifier qualifier);
int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *userdata);
unsigned int dev_get_flags(const struct net_device *);
int __dev_change_flags(struct net_device *dev, unsigned int flags,
diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index 174a0b98632b..142f755d507b 100644
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h
@@ -406,6 +406,32 @@ struct phy_device *ptp_clock_phydev(struct ptp_clock *ptp);

struct ptp_clock *ptp_clock_get_by_index(int index);

+/**
+ * netdev_ptp_clock_find() - obtain the next PTP clock in the netdev
+ * topology
+ *
+ * @dev: Pointer of the net device
+ * @index: Pointer of ptp clock index start point
+ */
+
+struct ptp_clock *netdev_ptp_clock_find(struct net_device *dev,
+ unsigned long *indexp);
+
+#define netdev_for_each_ptp_clock_start(dev, index, entry, start) \
+ for (index = start, entry = netdev_ptp_clock_find(dev, &index); \
+ entry; index++, entry = netdev_ptp_clock_find(dev, &index))
+
+/**
+ * netdev_support_hwtstamp() - return true if the hwtstamp belong to the
+ * netdev topology
+ *
+ * @dev: Pointer of the net device
+ * @hwtst: Pointer of the hwtstamp provider
+ */
+
+bool netdev_support_hwtstamp(struct net_device *dev,
+ struct hwtstamp_provider *hwtst);
+
/**
* ptp_find_pin() - obtain the pin index of a given auxiliary function
*
@@ -489,6 +515,12 @@ static inline struct phy_device *ptp_clock_phydev(struct ptp_clock *ptp);
{ return NULL; }
static inline struct ptp_clock *ptp_clock_get_by_index(int index);
{ return NULL; }
+static inline struct ptp_clock *netdev_ptp_clock_find(struct net_device *dev,
+ unsigned long *indexp)
+{ return NULL; }
+static inline bool netdev_support_hwtstamp(struct net_device *dev,
+ struct hwtstamp_provider *hwtst);
+{ return false; }
static inline int ptp_find_pin(struct ptp_clock *ptp,
enum ptp_pin_function func, unsigned int chan)
{ return -1; }
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 3f89074aa06c..07a33522532b 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -57,6 +57,7 @@ enum {
ETHTOOL_MSG_PLCA_GET_STATUS,
ETHTOOL_MSG_MM_GET,
ETHTOOL_MSG_MM_SET,
+ ETHTOOL_MSG_TSINFO_SET,

/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -470,6 +471,15 @@ enum {
};

/* TSINFO */
+enum {
+ ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_UNSPEC,
+ ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX, /* u32 */
+ ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER, /* u32 */
+
+ __ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_CNT,
+ ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_MAX = (__ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_CNT - 1)
+};
+

enum {
ETHTOOL_A_TSINFO_UNSPEC,
@@ -478,6 +488,8 @@ enum {
ETHTOOL_A_TSINFO_TX_TYPES, /* bitset */
ETHTOOL_A_TSINFO_RX_FILTERS, /* bitset */
ETHTOOL_A_TSINFO_PHC_INDEX, /* u32 */
+ ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST, /* nest - *_TSINFO_HWTSTAMP_PROVIDER_* */
+ ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS, /* u32 */

/* add new constants above here */
__ETHTOOL_A_TSINFO_CNT,
diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h
index a9ed48ee8fc7..49675a36a0b2 100644
--- a/include/uapi/linux/net_tstamp.h
+++ b/include/uapi/linux/net_tstamp.h
@@ -43,8 +43,9 @@ enum {
SOF_TIMESTAMPING_OPT_TX_SWHW = (1<<14),
SOF_TIMESTAMPING_BIND_PHC = (1 << 15),
SOF_TIMESTAMPING_OPT_ID_TCP = (1 << 16),
+ SOF_TIMESTAMPING_GHWTSTAMP = (1 << 17),

- SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_ID_TCP,
+ SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_GHWTSTAMP,
SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) |
SOF_TIMESTAMPING_LAST
};
diff --git a/net/core/dev.c b/net/core/dev.c
index d8dd293a7a27..39a7fac3f79c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -10800,6 +10800,29 @@ void netdev_set_default_ethtool_ops(struct net_device *dev,
}
EXPORT_SYMBOL_GPL(netdev_set_default_ethtool_ops);

+bool
+dev_support_hwtstamp_qualifier(struct net_device *dev,
+ enum hwtstamp_provider_qualifier qualifier)
+{
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+
+ if (!ops)
+ return false;
+
+ /* Return true with precise qualifier and with NIC without
+ * qualifier description to not break the old behavior.
+ */
+ if (!ops->supported_hwtstamp_qualifiers &&
+ qualifier == HWTSTAMP_PROVIDER_QUALIFIER_PRECISE)
+ return true;
+
+ if (ops->supported_hwtstamp_qualifiers & BIT(qualifier))
+ return true;
+
+ return false;
+}
+EXPORT_SYMBOL_GPL(dev_support_hwtstamp_qualifier);
+
/**
* netdev_sw_irq_coalesce_default_on() - enable SW IRQ coalescing by default
* @dev: netdev to enable the IRQ coalescing on
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index b3f45c307301..37071929128a 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -426,6 +426,7 @@ const char sof_timestamping_names[][ETH_GSTRING_LEN] = {
[const_ilog2(SOF_TIMESTAMPING_OPT_TX_SWHW)] = "option-tx-swhw",
[const_ilog2(SOF_TIMESTAMPING_BIND_PHC)] = "bind-phc",
[const_ilog2(SOF_TIMESTAMPING_OPT_ID_TCP)] = "option-id-tcp",
+ [const_ilog2(SOF_TIMESTAMPING_GHWTSTAMP)] = "get-hwtstamp",
};
static_assert(ARRAY_SIZE(sof_timestamping_names) == __SOF_TIMESTAMPING_CNT);

@@ -629,11 +630,41 @@ int ethtool_check_ops(const struct ethtool_ops *ops)
return 0;
}

+int ethtool_get_ts_info_by_phc(struct net_device *dev,
+ struct kernel_ethtool_ts_info *info,
+ struct hwtstamp_provider *hwtstamp)
+{
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+
+ memset(info, 0, sizeof(*info));
+ info->cmd = ETHTOOL_GET_TS_INFO;
+ info->phc_qualifier = hwtstamp->qualifier;
+
+ if (!netdev_support_hwtstamp(dev, hwtstamp))
+ return -ENODEV;
+
+ if (ptp_clock_from_phylib(hwtstamp->ptp) &&
+ phy_has_tsinfo(ptp_clock_phydev(hwtstamp->ptp)))
+ return phy_ts_info(ptp_clock_phydev(hwtstamp->ptp), info);
+
+ if (ptp_clock_from_netdev(hwtstamp->ptp) && ops->get_ts_info)
+ return ops->get_ts_info(dev, info);
+
+ info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
+ SOF_TIMESTAMPING_SOFTWARE;
+ info->phc_index = -1;
+
+ return 0;
+}
+
int __ethtool_get_ts_info(struct net_device *dev, struct kernel_ethtool_ts_info *info)
{
const struct ethtool_ops *ops = dev->ethtool_ops;
struct phy_device *phydev = dev->phydev;

+ if (dev->hwtstamp.ptp)
+ return ethtool_get_ts_info_by_phc(dev, info, &dev->hwtstamp);
+
memset(info, 0, sizeof(*info));
info->cmd = ETHTOOL_GET_TS_INFO;

diff --git a/net/ethtool/common.h b/net/ethtool/common.h
index 9de3d6255818..99575a403d0d 100644
--- a/net/ethtool/common.h
+++ b/net/ethtool/common.h
@@ -45,6 +45,9 @@ bool convert_legacy_settings_to_link_ksettings(
int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max);
int ethtool_get_max_rxnfc_channel(struct net_device *dev, u64 *max);
int __ethtool_get_ts_info(struct net_device *dev, struct kernel_ethtool_ts_info *info);
+int ethtool_get_ts_info_by_phc(struct net_device *dev,
+ struct kernel_ethtool_ts_info *info,
+ struct hwtstamp_provider *hwtst);

extern const struct ethtool_phy_ops *ethtool_phy_ops;
extern const struct ethtool_pse_ops *ethtool_pse_ops;
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index bd04f28d5cf4..4a4dc1765d10 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -306,6 +306,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_PLCA_GET_STATUS] = &ethnl_plca_status_request_ops,
[ETHTOOL_MSG_MM_GET] = &ethnl_mm_request_ops,
[ETHTOOL_MSG_MM_SET] = &ethnl_mm_request_ops,
+ [ETHTOOL_MSG_TSINFO_SET] = &ethnl_tsinfo_request_ops,
};

static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -974,9 +975,9 @@ static const struct genl_ops ethtool_genl_ops[] = {
{
.cmd = ETHTOOL_MSG_TSINFO_GET,
.doit = ethnl_default_doit,
- .start = ethnl_default_start,
- .dumpit = ethnl_default_dumpit,
- .done = ethnl_default_done,
+ .start = ethnl_tsinfo_start,
+ .dumpit = ethnl_tsinfo_dumpit,
+ .done = ethnl_tsinfo_done,
.policy = ethnl_tsinfo_get_policy,
.maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
},
@@ -1125,6 +1126,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.policy = ethnl_mm_set_policy,
.maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
},
+ {
+ .cmd = ETHTOOL_MSG_TSINFO_SET,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_default_set_doit,
+ .policy = ethnl_tsinfo_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_tsinfo_set_policy) - 1,
+ },
};

static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 9a333a8d04c1..8a6f767ab6db 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -422,7 +422,7 @@ extern const struct nla_policy ethnl_pause_get_policy[ETHTOOL_A_PAUSE_STATS_SRC
extern const struct nla_policy ethnl_pause_set_policy[ETHTOOL_A_PAUSE_TX + 1];
extern const struct nla_policy ethnl_eee_get_policy[ETHTOOL_A_EEE_HEADER + 1];
extern const struct nla_policy ethnl_eee_set_policy[ETHTOOL_A_EEE_TX_LPI_TIMER + 1];
-extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_HEADER + 1];
+extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1];
extern const struct nla_policy ethnl_cable_test_act_policy[ETHTOOL_A_CABLE_TEST_HEADER + 1];
extern const struct nla_policy ethnl_cable_test_tdr_act_policy[ETHTOOL_A_CABLE_TEST_TDR_CFG + 1];
extern const struct nla_policy ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_HEADER + 1];
@@ -441,6 +441,7 @@ extern const struct nla_policy ethnl_plca_set_cfg_policy[ETHTOOL_A_PLCA_MAX + 1]
extern const struct nla_policy ethnl_plca_get_status_policy[ETHTOOL_A_PLCA_HEADER + 1];
extern const struct nla_policy ethnl_mm_get_policy[ETHTOOL_A_MM_HEADER + 1];
extern const struct nla_policy ethnl_mm_set_policy[ETHTOOL_A_MM_MAX + 1];
+extern const struct nla_policy ethnl_tsinfo_set_policy[ETHTOOL_A_TSINFO_MAX + 1];

int ethnl_set_features(struct sk_buff *skb, struct genl_info *info);
int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info);
@@ -448,6 +449,9 @@ int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info);
int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info);
int ethnl_tunnel_info_start(struct netlink_callback *cb);
int ethnl_tunnel_info_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
+int ethnl_tsinfo_start(struct netlink_callback *cb);
+int ethnl_tsinfo_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
+int ethnl_tsinfo_done(struct netlink_callback *cb);

extern const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN];
extern const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN];
diff --git a/net/ethtool/tsinfo.c b/net/ethtool/tsinfo.c
index 608d270018cb..a898371745a0 100644
--- a/net/ethtool/tsinfo.c
+++ b/net/ethtool/tsinfo.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only

#include <linux/net_tstamp.h>
+#include <linux/ptp_clock_kernel.h>

#include "netlink.h"
#include "common.h"
@@ -8,50 +9,192 @@

struct tsinfo_req_info {
struct ethnl_req_info base;
+ struct {
+ int index;
+ u32 qualifier;
+ } hwtst;
+ bool get_hwtstamp;
};

struct tsinfo_reply_data {
struct ethnl_reply_data base;
- struct kernel_ethtool_ts_info ts_info;
+ union {
+ struct kernel_ethtool_ts_info ts_info;
+ struct {
+ u32 tx_type;
+ u32 rx_filter;
+ u32 flags;
+ } hwtst_config;
+ };
};

+#define TSINFO_REQINFO(__req_base) \
+ container_of(__req_base, struct tsinfo_req_info, base)
+
#define TSINFO_REPDATA(__reply_base) \
container_of(__reply_base, struct tsinfo_reply_data, base)

-const struct nla_policy ethnl_tsinfo_get_policy[] = {
+const struct nla_policy
+ethnl_tsinfo_hwtstamp_provider_policy[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_MAX + 1] = {
+ [ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX] = { .type = NLA_U32 },
+ [ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER] = { .type = NLA_U32 },
+};
+
+const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1] = {
[ETHTOOL_A_TSINFO_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
+ [ETHTOOL_A_TSINFO_TIMESTAMPING] = { .type = NLA_NESTED },
+ [ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST] = { .type = NLA_NESTED },
};

+static int
+tsinfo_parse_request(struct ethnl_req_info *req_base, struct nlattr **tb,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *hwtst_tb[ARRAY_SIZE(ethnl_tsinfo_hwtstamp_provider_policy)];
+ struct tsinfo_req_info *req = TSINFO_REQINFO(req_base);
+ unsigned long val = 0, mask = 0;
+ int ret;
+
+ req->hwtst.index = -1;
+
+ if (tb[ETHTOOL_A_TSINFO_TIMESTAMPING]) {
+ ret = ethnl_parse_bitset(&val, &mask, __SOF_TIMESTAMPING_CNT,
+ tb[ETHTOOL_A_TSINFO_TIMESTAMPING],
+ sof_timestamping_names, extack);
+ if (ret < 0)
+ return ret;
+
+ if (val & SOF_TIMESTAMPING_GHWTSTAMP) {
+ /* We support only the get of the current hwtstamp config
+ * for now.
+ */
+ if (tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST])
+ return -EOPNOTSUPP;
+
+ req->get_hwtstamp = true;
+ return 0;
+ }
+ }
+
+ if (!tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST])
+ return 0;
+
+ ret = nla_parse_nested(hwtst_tb,
+ ARRAY_SIZE(ethnl_tsinfo_hwtstamp_provider_policy) - 1,
+ tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST],
+ ethnl_tsinfo_hwtstamp_provider_policy, extack);
+ if (ret < 0)
+ return ret;
+
+ if (!hwtst_tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX] ||
+ !hwtst_tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER])
+ return -EINVAL;
+
+ ret = nla_get_u32(hwtst_tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX]);
+ if (ret < 0)
+ return -EINVAL;
+ req->hwtst.index = ret;
+
+ ret = nla_get_u32(hwtst_tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER]);
+ if (ret < 0 || HWTSTAMP_PROVIDER_QUALIFIER_CNT <= ret)
+ return -EINVAL;
+ req->hwtst.qualifier = ret;
+
+ return 0;
+}
+
static int tsinfo_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
const struct genl_info *info)
{
struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
+ struct tsinfo_req_info *req = TSINFO_REQINFO(req_base);
struct net_device *dev = reply_base->dev;
int ret;

ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;
- ret = __ethtool_get_ts_info(dev, &data->ts_info);
+
+ if (!netif_device_present(dev)) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (req->get_hwtstamp) {
+ struct kernel_hwtstamp_config cfg = {};
+
+ if (!dev->netdev_ops->ndo_hwtstamp_get) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ ret = dev_get_hwtstamp_phylib(dev, &cfg);
+ data->hwtst_config.tx_type = BIT(cfg.tx_type);
+ data->hwtst_config.rx_filter = BIT(cfg.rx_filter);
+ data->hwtst_config.flags = BIT(cfg.flags);
+ goto out;
+ }
+
+ if (req->hwtst.index != -1) {
+ struct hwtstamp_provider hwtstamp;
+
+ hwtstamp.ptp = ptp_clock_get_by_index(req->hwtst.index);
+ if (!hwtstamp.ptp) {
+ ret = -ENODEV;
+ goto out;
+ }
+ hwtstamp.qualifier = req->hwtst.qualifier;
+
+ ret = ethtool_get_ts_info_by_phc(dev, &data->ts_info,
+ &hwtstamp);
+ } else {
+ ret = __ethtool_get_ts_info(dev, &data->ts_info);
+ }
+
+out:
ethnl_ops_complete(dev);

return ret;
}

-static int tsinfo_reply_size(const struct ethnl_req_info *req_base,
- const struct ethnl_reply_data *reply_base)
+static int
+tsinfo_reply_size_hwtstamp_config(const struct tsinfo_reply_data *data,
+ bool compact)
{
- const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
- bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
- const struct kernel_ethtool_ts_info *ts_info = &data->ts_info;
int len = 0;
int ret;

- BUILD_BUG_ON(__SOF_TIMESTAMPING_CNT > 32);
- BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32);
- BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32);
+ if (data->hwtst_config.flags)
+ len += nla_total_size(sizeof(u32));
+
+ if (data->hwtst_config.tx_type) {
+ ret = ethnl_bitset32_size(&data->hwtst_config.tx_type,
+ NULL, __HWTSTAMP_TX_CNT,
+ ts_tx_type_names, compact);
+ if (ret < 0)
+ return ret;
+ len += ret; /* _TSINFO_TX_TYPES */
+ }
+ if (data->hwtst_config.rx_filter) {
+ ret = ethnl_bitset32_size(&data->hwtst_config.rx_filter,
+ NULL, __HWTSTAMP_FILTER_CNT,
+ ts_rx_filter_names, compact);
+ if (ret < 0)
+ return ret;
+ len += ret; /* _TSINFO_RX_FILTERS */
+ }
+
+ return len;
+}
+
+static int
+tsinfo_reply_size_ts_info(const struct kernel_ethtool_ts_info *ts_info,
+ bool compact)
+{
+ int len = 0;
+ int ret;

if (ts_info->so_timestamping) {
ret = ethnl_bitset32_size(&ts_info->so_timestamping, NULL,
@@ -77,19 +220,37 @@ static int tsinfo_reply_size(const struct ethnl_req_info *req_base,
return ret;
len += ret; /* _TSINFO_RX_FILTERS */
}
- if (ts_info->phc_index >= 0)
+ if (ts_info->phc_index >= 0) {
+ /* _TSINFO_HWTSTAMP_PROVIDER_NEST */
+ len += nla_total_size(sizeof(u32) * 2);
len += nla_total_size(sizeof(u32)); /* _TSINFO_PHC_INDEX */
+ }

return len;
}

-static int tsinfo_fill_reply(struct sk_buff *skb,
- const struct ethnl_req_info *req_base,
+static int tsinfo_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
- const struct kernel_ethtool_ts_info *ts_info = &data->ts_info;
+ struct tsinfo_req_info *req = TSINFO_REQINFO(req_base);
+
+ BUILD_BUG_ON(__SOF_TIMESTAMPING_CNT > 32);
+ BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32);
+ BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32);
+
+ if (req->get_hwtstamp)
+ return tsinfo_reply_size_hwtstamp_config(data, compact);
+
+ return tsinfo_reply_size_ts_info(&data->ts_info, compact);
+}
+
+static int tsinfo_fill_ts_info(struct sk_buff *skb,
+ const struct kernel_ethtool_ts_info *ts_info,
+ bool compact)
+{
+ struct nlattr *nest;
int ret;

if (ts_info->so_timestamping) {
@@ -116,13 +277,416 @@ static int tsinfo_fill_reply(struct sk_buff *skb,
if (ret < 0)
return ret;
}
- if (ts_info->phc_index >= 0 &&
- nla_put_u32(skb, ETHTOOL_A_TSINFO_PHC_INDEX, ts_info->phc_index))
- return -EMSGSIZE;
+ if (ts_info->phc_index >= 0) {
+ ret = nla_put_u32(skb, ETHTOOL_A_TSINFO_PHC_INDEX,
+ ts_info->phc_index);
+ if (ret)
+ return -EMSGSIZE;
+
+ nest = nla_nest_start(skb, ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST);
+ if (!nest)
+ return -EMSGSIZE;

+ ret = nla_put_u32(skb,
+ ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX,
+ ts_info->phc_index);
+ if (ret) {
+ nla_nest_cancel(skb, nest);
+ return ret;
+ }
+
+ ret = nla_put_u32(skb,
+ ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER,
+ ts_info->phc_qualifier);
+ if (ret) {
+ nla_nest_cancel(skb, nest);
+ return ret;
+ }
+
+ nla_nest_end(skb, nest);
+ }
return 0;
}

+static int
+tsinfo_fill_hwtstamp_config(struct sk_buff *skb,
+ const struct tsinfo_reply_data *data,
+ bool compact)
+{
+ int ret;
+
+ if (data->hwtst_config.flags) {
+ ret = nla_put_u32(skb, ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS,
+ data->hwtst_config.flags);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (data->hwtst_config.tx_type) {
+ ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_TX_TYPES,
+ &data->hwtst_config.tx_type, NULL,
+ __HWTSTAMP_TX_CNT,
+ ts_tx_type_names, compact);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (data->hwtst_config.rx_filter) {
+ ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_RX_FILTERS,
+ &data->hwtst_config.rx_filter,
+ NULL, __HWTSTAMP_FILTER_CNT,
+ ts_rx_filter_names, compact);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+static int tsinfo_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct tsinfo_reply_data *data = TSINFO_REPDATA(reply_base);
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ struct tsinfo_req_info *req = TSINFO_REQINFO(req_base);
+
+ if (req->get_hwtstamp)
+ return tsinfo_fill_hwtstamp_config(skb, data, compact);
+
+ return tsinfo_fill_ts_info(skb, &data->ts_info, compact);
+}
+
+struct ethnl_tsinfo_dump_ctx {
+ struct tsinfo_req_info *req_info;
+ struct tsinfo_reply_data *reply_data;
+ unsigned long pos_ifindex;
+ unsigned long pos_phcindex;
+ enum hwtstamp_provider_qualifier pos_phcqualifier;
+};
+
+static int ethnl_tsinfo_dump_one_ptp(struct sk_buff *skb, struct net_device *dev,
+ struct netlink_callback *cb,
+ struct ptp_clock *ptp)
+{
+ struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx;
+ struct tsinfo_reply_data *reply_data;
+ struct tsinfo_req_info *req_info;
+ void *ehdr;
+ int ret;
+
+ reply_data = ctx->reply_data;
+ req_info = ctx->req_info;
+ req_info->hwtst.index = ptp_clock_index(ptp);
+
+ for (; ctx->pos_phcqualifier < HWTSTAMP_PROVIDER_QUALIFIER_CNT;
+ ctx->pos_phcqualifier++) {
+ if (!dev_support_hwtstamp_qualifier(dev, ctx->pos_phcqualifier))
+ continue;
+
+ ehdr = ethnl_dump_put(skb, cb,
+ ETHTOOL_MSG_TSINFO_GET_REPLY);
+ if (!ehdr)
+ return -EMSGSIZE;
+
+ memset(reply_data, 0, sizeof(*reply_data));
+ reply_data->base.dev = dev;
+ req_info->hwtst.qualifier = ctx->pos_phcqualifier;
+ ret = tsinfo_prepare_data(&req_info->base,
+ &reply_data->base,
+ genl_info_dump(cb));
+ if (ret < 0)
+ break;
+
+ ret = ethnl_fill_reply_header(skb, dev,
+ ETHTOOL_A_TSINFO_HEADER);
+ if (ret < 0)
+ break;
+
+ ret = tsinfo_fill_reply(skb, &req_info->base,
+ &reply_data->base);
+ if (ret < 0)
+ break;
+ }
+
+ reply_data->base.dev = NULL;
+ if (ret < 0)
+ genlmsg_cancel(skb, ehdr);
+ else
+ genlmsg_end(skb, ehdr);
+ return ret;
+}
+
+static int ethnl_tsinfo_dump_one_dev(struct sk_buff *skb, struct net_device *dev,
+ struct netlink_callback *cb)
+{
+ struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx;
+ struct ptp_clock *ptp;
+ int ret;
+
+ netdev_for_each_ptp_clock_start(dev, ctx->pos_phcindex, ptp,
+ ctx->pos_phcindex) {
+ ret = ethnl_tsinfo_dump_one_ptp(skb, dev, cb, ptp);
+ if (ret < 0 && ret != -EOPNOTSUPP)
+ break;
+ ctx->pos_phcqualifier = HWTSTAMP_PROVIDER_QUALIFIER_PRECISE;
+ }
+
+ return ret;
+}
+
+int ethnl_tsinfo_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx;
+ struct net *net = sock_net(skb->sk);
+ struct net_device *dev;
+ int ret = 0;
+
+ rtnl_lock();
+ if (ctx->req_info->base.dev) {
+ ret = ethnl_tsinfo_dump_one_dev(skb,
+ ctx->req_info->base.dev,
+ cb);
+ } else {
+ for_each_netdev_dump(net, dev, ctx->pos_ifindex) {
+ ret = ethnl_tsinfo_dump_one_dev(skb, dev, cb);
+ if (ret < 0 && ret != -EOPNOTSUPP)
+ break;
+ ctx->pos_phcindex = 0;
+ }
+ }
+ rtnl_unlock();
+
+ if (ret == -EMSGSIZE && skb->len)
+ return skb->len;
+ return ret;
+}
+
+static int
+tsinfo_dump_parse_request(struct nlattr **tb, struct netlink_ext_ack *extack)
+{
+ unsigned long val = 0, mask = 0;
+ int ret;
+
+ ret = ethnl_parse_bitset(&val, &mask, __SOF_TIMESTAMPING_CNT,
+ tb[ETHTOOL_A_TSINFO_TIMESTAMPING],
+ sof_timestamping_names, extack);
+ if (ret < 0)
+ return ret;
+
+ if (val & SOF_TIMESTAMPING_GHWTSTAMP)
+ /* We do not support several hwtstamp config for now */
+ return -EOPNOTSUPP;
+
+ return 0;
+}
+
+int ethnl_tsinfo_start(struct netlink_callback *cb)
+{
+ const struct genl_dumpit_info *info = genl_dumpit_info(cb);
+ struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx;
+ struct nlattr **tb = info->info.attrs;
+ struct tsinfo_reply_data *reply_data;
+ struct tsinfo_req_info *req_info;
+ int ret;
+
+ BUILD_BUG_ON(sizeof(*ctx) > sizeof(cb->ctx));
+
+ req_info = kzalloc(sizeof(*req_info), GFP_KERNEL);
+ if (!req_info)
+ return -ENOMEM;
+ reply_data = kzalloc(sizeof(*reply_data), GFP_KERNEL);
+ if (!reply_data) {
+ ret = -ENOMEM;
+ goto free_req_info;
+ }
+
+ ret = ethnl_parse_header_dev_get(&req_info->base,
+ tb[ETHTOOL_A_TSINFO_HEADER],
+ sock_net(cb->skb->sk), cb->extack,
+ false);
+ if (ret < 0)
+ goto free_reply_data;
+
+ ret = tsinfo_dump_parse_request(tb, cb->extack);
+ if (ret < 0)
+ goto put_header_dev;
+
+ ctx->req_info = req_info;
+ ctx->reply_data = reply_data;
+ ctx->pos_ifindex = 0;
+ ctx->pos_phcindex = 0;
+ ctx->pos_phcqualifier = HWTSTAMP_PROVIDER_QUALIFIER_PRECISE;
+
+ return 0;
+
+put_header_dev:
+ if (req_info->base.dev) {
+ ethnl_parse_header_dev_put(&req_info->base);
+ req_info->base.dev = NULL;
+ }
+free_reply_data:
+ kfree(reply_data);
+free_req_info:
+ kfree(req_info);
+
+ return ret;
+}
+
+int ethnl_tsinfo_done(struct netlink_callback *cb)
+{
+ struct ethnl_tsinfo_dump_ctx *ctx = (void *)cb->ctx;
+ struct tsinfo_req_info *req_info;
+
+ req_info = ctx->req_info;
+ if (req_info->base.dev) {
+ ethnl_parse_header_dev_put(&req_info->base);
+ req_info->base.dev = NULL;
+ }
+ kfree(ctx->reply_data);
+ kfree(ctx->req_info);
+
+ return 0;
+}
+
+/* TSINFO_SET (set hwtstamp config) */
+const struct nla_policy ethnl_tsinfo_set_policy[ETHTOOL_A_TSINFO_MAX + 1] = {
+ [ETHTOOL_A_TSINFO_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
+ [ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST] = { .type = NLA_NESTED },
+ [ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS] = { .type = NLA_U32 },
+ [ETHTOOL_A_TSINFO_RX_FILTERS] = { .type = NLA_NESTED },
+ [ETHTOOL_A_TSINFO_TX_TYPES] = { .type = NLA_NESTED },
+};
+
+static int ethnl_set_tsinfo_validate(struct ethnl_req_info *req_base,
+ struct genl_info *info)
+{
+ const struct net_device_ops *ops = req_base->dev->netdev_ops;
+
+ if (!ops->ndo_hwtstamp_set || !ops->ndo_hwtstamp_get)
+ return -EOPNOTSUPP;
+
+ return 1;
+}
+
+static int ethnl_set_tsinfo(struct ethnl_req_info *req_base,
+ struct genl_info *info)
+{
+ struct nlattr *hwtst_tb[ARRAY_SIZE(ethnl_tsinfo_hwtstamp_provider_policy)];
+ unsigned long mask = 0, req_rx_filter, req_tx_type;
+ struct kernel_hwtstamp_config hwtst_config = {0};
+ struct net_device *dev = req_base->dev;
+ struct hwtstamp_provider hwtstamp;
+ struct nlattr **tb = info->attrs;
+ int ret, phc_index = 0;
+ bool mod = false;
+
+ BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32);
+ BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32);
+
+ if (!netif_device_present(dev))
+ return -ENODEV;
+
+ if (tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST]) {
+ ret = nla_parse_nested(hwtst_tb,
+ ARRAY_SIZE(ethnl_tsinfo_hwtstamp_provider_policy) - 1,
+ tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_NEST],
+ ethnl_tsinfo_hwtstamp_provider_policy, info->extack);
+ if (ret < 0)
+ return ret;
+
+ if (!hwtst_tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX] ||
+ !hwtst_tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER])
+ return -EINVAL;
+
+ memcpy(&hwtstamp, &dev->hwtstamp, sizeof(hwtstamp));
+ if (hwtstamp.ptp)
+ phc_index = ptp_clock_index(hwtstamp.ptp);
+
+ ethnl_update_u32(&phc_index,
+ hwtst_tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_INDEX],
+ &mod);
+ ethnl_update_u32(&hwtstamp.qualifier,
+ hwtst_tb[ETHTOOL_A_TSINFO_HWTSTAMP_PROVIDER_QUALIFIER],
+ &mod);
+
+ /* Does the hwtstamp supported in the netdev topology */
+ if (mod) {
+ hwtstamp.ptp = ptp_clock_get_by_index(phc_index);
+ if (!hwtstamp.ptp)
+ return -ENODEV;
+
+ if (!netdev_support_hwtstamp(dev, &hwtstamp))
+ return -ENODEV;
+ }
+ }
+
+ /* Get current hwtstamp config if we are not changing the hwtstamp
+ * source
+ */
+ if (!mod) {
+ ret = dev_get_hwtstamp_phylib(dev, &hwtst_config);
+ if (ret < 0 && ret != EOPNOTSUPP)
+ return ret;
+ }
+
+ /* Get the hwtstamp config from netlink */
+ if (tb[ETHTOOL_A_TSINFO_TX_TYPES]) {
+ ret = ethnl_parse_bitset(&req_tx_type, &mask,
+ __HWTSTAMP_TX_CNT,
+ tb[ETHTOOL_A_TSINFO_TX_TYPES],
+ ts_tx_type_names, info->extack);
+ if (ret < 0)
+ return ret;
+
+ if (ffs(req_tx_type) != fls(req_tx_type))
+ return -EINVAL;
+
+ hwtst_config.tx_type = ffs(req_tx_type) - 1;
+ }
+ if (tb[ETHTOOL_A_TSINFO_RX_FILTERS]) {
+ ret = ethnl_parse_bitset(&req_rx_filter, &mask,
+ __HWTSTAMP_FILTER_CNT,
+ tb[ETHTOOL_A_TSINFO_RX_FILTERS],
+ ts_rx_filter_names, info->extack);
+ if (ret < 0)
+ return ret;
+
+ if (ffs(req_rx_filter) != fls(req_rx_filter))
+ return -EINVAL;
+
+ hwtst_config.rx_filter = ffs(req_rx_filter) - 1;
+ }
+ if (tb[ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS]) {
+ ret = nla_get_u32(tb[ETHTOOL_A_TSINFO_HWTSTAMP_FLAGS]);
+ if (ret < 0)
+ return ret;
+ hwtst_config.flags = ret;
+ }
+
+ ret = net_hwtstamp_validate(&hwtst_config);
+ if (ret)
+ return ret;
+
+ /* Disable current time stamping if we try to enable another one */
+ if (mod && (hwtst_config.tx_type || hwtst_config.rx_filter)) {
+ struct kernel_hwtstamp_config zero_config = {0};
+
+ ret = dev_set_hwtstamp_phylib(dev, &zero_config, info->extack);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Changed the selected hwtstamp source if needed */
+ if (mod)
+ memcpy(&dev->hwtstamp, &hwtstamp, sizeof(hwtstamp));
+
+ ret = dev_set_hwtstamp_phylib(dev, &hwtst_config, info->extack);
+ if (ret < 0)
+ return ret;
+
+ return 1;
+}
+
const struct ethnl_request_ops ethnl_tsinfo_request_ops = {
.request_cmd = ETHTOOL_MSG_TSINFO_GET,
.reply_cmd = ETHTOOL_MSG_TSINFO_GET_REPLY,
@@ -130,7 +694,11 @@ const struct ethnl_request_ops ethnl_tsinfo_request_ops = {
.req_info_size = sizeof(struct tsinfo_req_info),
.reply_data_size = sizeof(struct tsinfo_reply_data),

+ .parse_request = tsinfo_parse_request,
.prepare_data = tsinfo_prepare_data,
.reply_size = tsinfo_reply_size,
.fill_reply = tsinfo_fill_reply,
+
+ .set_validate = ethnl_set_tsinfo_validate,
+ .set = ethnl_set_tsinfo,
};

--
2.25.1