2023-10-19 14:30:03

by Kory Maincent

Subject: [PATCH net-next v6 00/16] net: Make timestamping selectable

Up until now, there was no way to let the user select the layer at
which time stamping occurs. The stack assumed that PHY time stamping
is always preferred, but some MAC/PHY combinations were buggy.

This series updates the default MAC/PHY default timestamping and aims to
allow the user to select the desired layer administratively.

Changes in v2:
- Move selected_timestamping_layer variable of the concerned patch.
- Use sysfs_streq instead of strmcmp.
- Use the PHY timestamp only if available.

Changes in v3:
- Expose the PTP choice to ethtool instead of sysfs.
You can test it with the ethtool source on branch feature_ptp of:
https://github.com/kmaincent/ethtool
- Added a devicetree binding to select the preferred timestamp.

Changes in v4:
- Move on to ethtool netlink instead of ioctl.
- Add a netdev notifier to allow packet trapping by the MAC in case of PHY
time stamping.
- Add a PHY whitelist to not break the old PHY default time-stamping
preference API.

Change in v5:
- Update to ndo_hwstamp_get/set. This bring several new patches.
- Add few patches to make the glue.
- Convert macb to ndo_hwstamp_get/set.
- Add netlink specs description of new ethtool commands.
- Removed netdev notifier.
- Split the patches that expose the timestamping to userspace to separate
the core and ethtool development.
- Add description of software timestamping.
- Convert PHYs hwtstamp callback to use kernel_hwtstamp_config.

Change in v6:
- Few fixes from the reviews.
- Replace the allowlist to default_timestamp flag to know which phy is
using old API behavior.
- Rename the timestamping layer enum values.
- Move to a simple enum instead of the mix between enum and bitfield.
- Update ts_info and ts-set in software timestamping case.

Signed-off-by: Kory Maincent <[email protected]>
---
Kory Maincent (15):
net: Convert PHYs hwtstamp callback to use kernel_hwtstamp_config
net: phy: Remove the call to phy_mii_ioctl in phy_hwstamp_get/set
net: macb: Convert to ndo_hwtstamp_get() and ndo_hwtstamp_set()
net: Make dev_set_hwtstamp_phylib accessible
net: phy: micrel: fix ts_info value in case of no phc
net_tstamp: Add TIMESTAMPING SOFTWARE and HARDWARE mask
net: ethtool: Add a command to expose current time stamping layer
netlink: specs: Introduce new netlink command to get current timestamp
net: ethtool: Add a command to list available time stamping layers
netlink: specs: Introduce new netlink command to list available time stamping layers
net: Replace hwtstamp_source by timestamping layer
net: Change the API of PHY default timestamp to MAC
net: ethtool: ts: Update GET_TS to reply the current selected timestamp
net ethtool: net: Let the active time stamping layer be selectable
netlink: specs: Introduce time stamping set command

Richard Cochran (1):
net: ethtool: Refactor identical get_ts_info implementations.

Documentation/netlink/specs/ethtool.yaml | 57 +++++
Documentation/networking/ethtool-netlink.rst | 63 ++++++
drivers/net/bonding/bond_main.c | 29 +--
drivers/net/ethernet/cadence/macb.h | 15 +-
drivers/net/ethernet/cadence/macb_main.c | 42 +++-
drivers/net/ethernet/cadence/macb_ptp.c | 28 +--
.../net/ethernet/microchip/lan966x/lan966x_main.c | 6 +-
drivers/net/macvlan.c | 14 +-
drivers/net/phy/bcm-phy-ptp.c | 18 +-
drivers/net/phy/dp83640.c | 27 +--
drivers/net/phy/micrel.c | 50 ++---
drivers/net/phy/mscc/mscc_ptp.c | 20 +-
drivers/net/phy/nxp-c45-tja11xx.c | 20 +-
drivers/net/phy/phy.c | 28 ++-
drivers/net/phy/phy_device.c | 37 ++++
drivers/ptp/ptp_ines.c | 16 +-
include/linux/ethtool.h | 8 +
include/linux/mii_timestamper.h | 4 +-
include/linux/net_tstamp.h | 11 +-
include/linux/netdevice.h | 8 +
include/linux/phy.h | 10 +-
include/uapi/linux/ethtool_netlink.h | 29 +++
include/uapi/linux/net_tstamp.h | 18 ++
net/8021q/vlan_dev.c | 15 +-
net/core/dev.c | 3 +
net/core/dev_ioctl.c | 43 ++--
net/core/timestamping.c | 10 +
net/ethtool/Makefile | 2 +-
net/ethtool/common.c | 25 ++-
net/ethtool/common.h | 1 +
net/ethtool/netlink.c | 28 +++
net/ethtool/netlink.h | 4 +
net/ethtool/ts.c | 244 +++++++++++++++++++++
33 files changed, 732 insertions(+), 201 deletions(-)
---
base-commit: 2b2cd9f2c53ea51bdb28203b91b6d518d88b7e03
change-id: 20231011-feature_ptp_netnext-3f278578e84b

Best regards,
--
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

2023-10-19 14:30:32

by Kory Maincent

Subject: [PATCH net-next v6 02/16] net: phy: Remove the call to phy_mii_ioctl in phy_hwstamp_get/set

__phy_hwtstamp_set function were calling the phy_mii_ioctl function
which will then use the ifreq pointer to call the hwtstamp callback.
Now that ifreq has been removed from the hwstamp callback parameters
it seems more logical to not go through the phy_mii_ioctl function and pass
directly kernel_hwtstamp_config parameter to the hwtstamp callback.

Lets do the same for __phy_hwtstamp_get function and return directly
EOPNOTSUPP as SIOCGHWTSTAMP is not supported for now for the PHYs.

Signed-off-by: Kory Maincent <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
---
drivers/net/phy/phy.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index d058316666ba..3376e58e2b88 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -486,7 +486,7 @@ int __phy_hwtstamp_get(struct phy_device *phydev,
if (!phydev)
return -ENODEV;

- return phy_mii_ioctl(phydev, config->ifr, SIOCGHWTSTAMP);
+ return -EOPNOTSUPP;
}

/**
@@ -503,7 +503,10 @@ int __phy_hwtstamp_set(struct phy_device *phydev,
if (!phydev)
return -ENODEV;

- return phy_mii_ioctl(phydev, config->ifr, SIOCSHWTSTAMP);
+ if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
+ return phydev->mii_ts->hwtstamp(phydev->mii_ts, config, extack);
+
+ return -EOPNOTSUPP;
}

/**

--
2.25.1

2023-10-19 14:30:34

by Kory Maincent

Subject: [PATCH net-next v6 03/16] net: ethtool: Refactor identical get_ts_info implementations.

From: Richard Cochran <[email protected]>

The vlan, macvlan and the bonding drivers call their "real" device driver
in order to report the time stamping capabilities. Provide a core
ethtool helper function to avoid copy/paste in the stack.

Signed-off-by: Richard Cochran <[email protected]>
Signed-off-by: Kory Maincent <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Reviewed-by: Jay Vosburgh <[email protected]>
---

Change in v5:
- Fixe typo.

Change in v6:
- Removed unused variable spotted by kernel test robot.
---
drivers/net/bonding/bond_main.c | 29 ++---------------------------
drivers/net/macvlan.c | 14 +-------------
include/linux/ethtool.h | 8 ++++++++
net/8021q/vlan_dev.c | 15 +--------------
net/ethtool/common.c | 6 ++++++
5 files changed, 18 insertions(+), 54 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index ed7212e61c54..fe25fa59fd08 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -5749,10 +5749,8 @@ static int bond_ethtool_get_ts_info(struct net_device *bond_dev,
{
struct bonding *bond = netdev_priv(bond_dev);
struct ethtool_ts_info ts_info;
- const struct ethtool_ops *ops;
struct net_device *real_dev;
bool sw_tx_support = false;
- struct phy_device *phydev;
struct list_head *iter;
struct slave *slave;
int ret = 0;
@@ -5763,29 +5761,12 @@ static int bond_ethtool_get_ts_info(struct net_device *bond_dev,
rcu_read_unlock();

if (real_dev) {
- ops = real_dev->ethtool_ops;
- phydev = real_dev->phydev;
-
- if (phy_has_tsinfo(phydev)) {
- ret = phy_ts_info(phydev, info);
- goto out;
- } else if (ops->get_ts_info) {
- ret = ops->get_ts_info(real_dev, info);
- goto out;
- }
+ ret = ethtool_get_ts_info_by_layer(real_dev, info);
} else {
/* Check if all slaves support software tx timestamping */
rcu_read_lock();
bond_for_each_slave_rcu(bond, slave, iter) {
- ret = -1;
- ops = slave->dev->ethtool_ops;
- phydev = slave->dev->phydev;
-
- if (phy_has_tsinfo(phydev))
- ret = phy_ts_info(phydev, &ts_info);
- else if (ops->get_ts_info)
- ret = ops->get_ts_info(slave->dev, &ts_info);
-
+ ret = ethtool_get_ts_info_by_layer(slave->dev, &ts_info);
if (!ret && (ts_info.so_timestamping & SOF_TIMESTAMPING_TX_SOFTWARE)) {
sw_tx_support = true;
continue;
@@ -5797,15 +5778,9 @@ static int bond_ethtool_get_ts_info(struct net_device *bond_dev,
rcu_read_unlock();
}

- ret = 0;
- info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
- SOF_TIMESTAMPING_SOFTWARE;
if (sw_tx_support)
info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE;

- info->phc_index = -1;
-
-out:
dev_put(real_dev);
return ret;
}
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 02bd201bc7e5..759406fbaea8 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -1086,20 +1086,8 @@ static int macvlan_ethtool_get_ts_info(struct net_device *dev,
struct ethtool_ts_info *info)
{
struct net_device *real_dev = macvlan_dev_real_dev(dev);
- const struct ethtool_ops *ops = real_dev->ethtool_ops;
- struct phy_device *phydev = real_dev->phydev;

- if (phy_has_tsinfo(phydev)) {
- return phy_ts_info(phydev, info);
- } else if (ops->get_ts_info) {
- return ops->get_ts_info(real_dev, info);
- } else {
- info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
- SOF_TIMESTAMPING_SOFTWARE;
- info->phc_index = -1;
- }
-
- return 0;
+ return ethtool_get_ts_info_by_layer(real_dev, info);
}

static netdev_features_t macvlan_fix_features(struct net_device *dev,
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 62b61527bcc4..1159daac776e 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -1043,6 +1043,14 @@ static inline int ethtool_mm_frag_size_min_to_add(u32 val_min, u32 *val_add,
return -EINVAL;
}

+/**
+ * ethtool_get_ts_info_by_layer - Obtains time stamping capabilities from the MAC or PHY layer.
+ * @dev: pointer to net_device structure
+ * @info: buffer to hold the result
+ * Returns zero on success, non-zero otherwise.
+ */
+int ethtool_get_ts_info_by_layer(struct net_device *dev, struct ethtool_ts_info *info);
+
/**
* ethtool_sprintf - Write formatted string to ethtool string data
* @data: Pointer to start of string to update
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 2a7f1b15714a..407b2335f091 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -702,20 +702,7 @@ static int vlan_ethtool_get_ts_info(struct net_device *dev,
struct ethtool_ts_info *info)
{
const struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
- const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops;
- struct phy_device *phydev = vlan->real_dev->phydev;
-
- if (phy_has_tsinfo(phydev)) {
- return phy_ts_info(phydev, info);
- } else if (ops->get_ts_info) {
- return ops->get_ts_info(vlan->real_dev, info);
- } else {
- info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |
- SOF_TIMESTAMPING_SOFTWARE;
- info->phc_index = -1;
- }
-
- return 0;
+ return ethtool_get_ts_info_by_layer(vlan->real_dev, info);
}

static void vlan_dev_get_stats64(struct net_device *dev,
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index f5598c5f50de..e2315e24d695 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -661,6 +661,12 @@ int ethtool_get_phc_vclocks(struct net_device *dev, int **vclock_index)
}
EXPORT_SYMBOL(ethtool_get_phc_vclocks);

+int ethtool_get_ts_info_by_layer(struct net_device *dev, struct ethtool_ts_info *info)
+{
+ return __ethtool_get_ts_info(dev, info);
+}
+EXPORT_SYMBOL(ethtool_get_ts_info_by_layer);
+
const struct ethtool_phy_ops *ethtool_phy_ops;

void ethtool_set_ethtool_phy_ops(const struct ethtool_phy_ops *ops)

--
2.25.1

2023-10-19 14:30:40

by Kory Maincent

Subject: [PATCH net-next v6 09/16] netlink: specs: Introduce new netlink command to get current timestamp

Add a new commands allowing to get the current time stamping on a
netdevice's link.

Example usage :
./ynl/cli.py --spec netlink/specs/ethtool.yaml --no-schema --do ts-get \
--json '{"header":{"dev-name":"eth0"}}'
{'header': {'dev-index': 3, 'dev-name': 'eth0'}, 'ts-layer': 1}

Signed-off-by: Kory Maincent <[email protected]>
---
Documentation/netlink/specs/ethtool.yaml | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml
index 837b565577ca..49ee028e97ca 100644
--- a/Documentation/netlink/specs/ethtool.yaml
+++ b/Documentation/netlink/specs/ethtool.yaml
@@ -942,6 +942,16 @@ attribute-sets:
-
name: burst-tmr
type: u32
+ -
+ name: ts
+ attributes:
+ -
+ name: header
+ type: nest
+ nested-attributes: header
+ -
+ name: ts-layer
+ type: u32

operations:
enum-model: directional
@@ -1692,3 +1702,17 @@ operations:
name: mm-ntf
doc: Notification for change in MAC Merge configuration.
notify: mm-get
+ -
+ name: ts-get
+ doc: Get current timestamp
+
+ attribute-set: ts
+
+ do:
+ request:
+ attributes:
+ - header
+ reply:
+ attributes: &ts
+ - header
+ - ts-layer

--
2.25.1

2023-10-19 14:30:50

by Kory Maincent

Subject: [PATCH net-next v6 12/16] net: Replace hwtstamp_source by timestamping layer

Replace hwtstamp_source which is only used by the kernel_hwtstamp_config
structure by the more widely use timestamp_layer structure. This is done
to prepare the support of selectable timestamping source.

Signed-off-by: Kory Maincent <[email protected]>
---

Change in v6:
- Follow timestamping layer naming update.
---
drivers/net/ethernet/microchip/lan966x/lan966x_main.c | 6 +++---
include/linux/net_tstamp.h | 11 +++--------
net/core/dev_ioctl.c | 2 +-
3 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
index 8e4101628fbd..b219259600e7 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
@@ -470,15 +470,15 @@ static int lan966x_port_hwtstamp_set(struct net_device *dev,
struct lan966x_port *port = netdev_priv(dev);
int err;

- if (cfg->source != HWTSTAMP_SOURCE_NETDEV &&
- cfg->source != HWTSTAMP_SOURCE_PHYLIB)
+ if (cfg->source != MAC_TIMESTAMPING &&
+ cfg->source != PHY_TIMESTAMPING)
return -EOPNOTSUPP;

err = lan966x_ptp_setup_traps(port, cfg);
if (err)
return err;

- if (cfg->source == HWTSTAMP_SOURCE_NETDEV) {
+ if (cfg->source == MAC_TIMESTAMPING) {
if (!port->lan966x->ptp)
return -EOPNOTSUPP;

diff --git a/include/linux/net_tstamp.h b/include/linux/net_tstamp.h
index eb01c37e71e0..bb289c2ad376 100644
--- a/include/linux/net_tstamp.h
+++ b/include/linux/net_tstamp.h
@@ -5,11 +5,6 @@

#include <uapi/linux/net_tstamp.h>

-enum hwtstamp_source {
- HWTSTAMP_SOURCE_NETDEV,
- HWTSTAMP_SOURCE_PHYLIB,
-};
-
/**
* struct kernel_hwtstamp_config - Kernel copy of struct hwtstamp_config
*
@@ -20,8 +15,8 @@ enum hwtstamp_source {
* a legacy implementation of a lower driver
* @copied_to_user: request was passed to a legacy implementation which already
* copied the ioctl request back to user space
- * @source: indication whether timestamps should come from the netdev or from
- * an attached phylib PHY
+ * @source: indication whether timestamps should come from software, the netdev
+ * or from an attached phylib PHY
*
* Prefer using this structure for in-kernel processing of hardware
* timestamping configuration, over the inextensible struct hwtstamp_config
@@ -33,7 +28,7 @@ struct kernel_hwtstamp_config {
int rx_filter;
struct ifreq *ifr;
bool copied_to_user;
- enum hwtstamp_source source;
+ enum timestamping_layer source;
};

static inline void hwtstamp_config_to_kernel(struct kernel_hwtstamp_config *kernel_cfg,
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index cb60b0b9c31d..57d9f25f16b8 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -332,7 +332,7 @@ int dev_set_hwtstamp_phylib(struct net_device *dev,
bool changed = false;
int err;

- cfg->source = phy_ts ? HWTSTAMP_SOURCE_PHYLIB : HWTSTAMP_SOURCE_NETDEV;
+ cfg->source = phy_ts ? PHY_TIMESTAMPING : NET_TIMESTAMPING;

if (phy_ts && (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) {
err = ops->ndo_hwtstamp_get(dev, &old_cfg);

--
2.25.1

2023-10-19 14:31:03

by Kory Maincent

Subject: [PATCH net-next v6 15/16] net ethtool: net: Let the active time stamping layer be selectable

Now that the current timestamp is saved in a variable lets add the
ETHTOOL_MSG_TS_SET ethtool netlink socket to make it selectable.

Signed-off-by: Kory Maincent <[email protected]>
---

Changes in v2:
- Move selected_timestamping_layer introduction in this patch.
- Replace strmcmp by sysfs_streq.
- Use the PHY timestamp only if available.

Changes in v3:
- Add a devicetree binding to select the preferred timestamp
- Replace the way to select timestamp through ethtool instead of sysfs
You can test it with the ethtool source on branch feature_ptp of:
https://github.com/kmaincent/ethtool

Changes in v4:
- Change the API to select MAC default time stamping instead of the PHY.
- Add a whitelist to no break the old timestamp PHY default preferences
for current PHY.
- Replace the ethtool ioctl by netlink.
- Add a netdev notifier to allow network device to create trap on PTP
packets. Not tested as it need to change the lan966x driver that
implement packet traps. I will do after the hwtstamp management change
to NDOs.

Changes in v5:
- Remove the netdev notifier added in v4.
- Extract the default timestamp API change in another patch.

Changes in v6:
- Update the error message.
- Put ndo_hwtstamp_set check first as it is most likely what most drivers
currently do not support.
- Follow timestamping layer naming update.
- Update the timestamp layer check.
- Update timestamp set between MAC and software.
---
Documentation/networking/ethtool-netlink.rst | 17 +++++
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/netlink.c | 8 +++
net/ethtool/netlink.h | 1 +
net/ethtool/ts.c | 99 ++++++++++++++++++++++++++++
5 files changed, 126 insertions(+)

diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index b8d00676ed82..530c1775e5f4 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -227,6 +227,7 @@ Userspace to kernel:
``ETHTOOL_MSG_MM_SET`` set MAC merge layer parameters
``ETHTOOL_MSG_TS_GET`` get current timestamping
``ETHTOOL_MSG_TS_LIST_GET`` list available timestampings
+ ``ETHTOOL_MSG_TS_SET`` set current timestamping
===================================== =================================

Kernel to userspace:
@@ -2038,6 +2039,21 @@ Kernel response contents:

This command lists all the possible timestamp layer available.

+TS_SET
+======
+
+Modify the selected timestamping.
+
+Request contents:
+
+ ======================= ====== ===================
+ ``ETHTOOL_A_TS_HEADER`` nested reply header
+ ``ETHTOOL_A_TS_LAYER`` u32 timestamping
+ ======================= ====== ===================
+
+This command set the timestamping with one that should be listed by the
+TSLIST_GET command.
+
Request translation
===================

@@ -2146,4 +2162,5 @@ are netlink only.
n/a ``ETHTOOL_MSG_MM_SET``
n/a ``ETHTOOL_MSG_TS_GET``
n/a ``ETHTOOL_MSG_TS_LIST_GET``
+ n/a ``ETHTOOL_MSG_TS_SET``
=================================== =====================================
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 62b885d44d06..df6c4fcc62c1 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -59,6 +59,7 @@ enum {
ETHTOOL_MSG_MM_SET,
ETHTOOL_MSG_TS_GET,
ETHTOOL_MSG_TS_LIST_GET,
+ ETHTOOL_MSG_TS_SET,

/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 842c9db1531f..8322bf71f80d 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -308,6 +308,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_MM_SET] = &ethnl_mm_request_ops,
[ETHTOOL_MSG_TS_GET] = &ethnl_ts_request_ops,
[ETHTOOL_MSG_TS_LIST_GET] = &ethnl_ts_list_request_ops,
+ [ETHTOOL_MSG_TS_SET] = &ethnl_ts_request_ops,
};

static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -1148,6 +1149,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.policy = ethnl_ts_get_policy,
.maxattr = ARRAY_SIZE(ethnl_ts_get_policy) - 1,
},
+ {
+ .cmd = ETHTOOL_MSG_TS_SET,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_default_set_doit,
+ .policy = ethnl_ts_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_ts_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 ea8c312db3af..8fedf234b824 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -444,6 +444,7 @@ extern const struct nla_policy ethnl_plca_get_status_policy[ETHTOOL_A_PLCA_HEADE
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_ts_get_policy[ETHTOOL_A_TS_HEADER + 1];
+extern const struct nla_policy ethnl_ts_set_policy[ETHTOOL_A_TS_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);
diff --git a/net/ethtool/ts.c b/net/ethtool/ts.c
index bd219512b8de..357265e74e08 100644
--- a/net/ethtool/ts.c
+++ b/net/ethtool/ts.c
@@ -59,6 +59,102 @@ static int ts_fill_reply(struct sk_buff *skb,
return nla_put_u32(skb, ETHTOOL_A_TS_LAYER, data->ts_layer);
}

+/* TS_SET */
+const struct nla_policy ethnl_ts_set_policy[] = {
+ [ETHTOOL_A_TS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
+ [ETHTOOL_A_TS_LAYER] = NLA_POLICY_RANGE(NLA_U32, 0,
+ __TIMESTAMPING_COUNT - 1)
+};
+
+static int ethnl_set_ts_validate(struct ethnl_req_info *req_info,
+ struct genl_info *info)
+{
+ struct nlattr **tb = info->attrs;
+ const struct net_device_ops *ops = req_info->dev->netdev_ops;
+
+ if (!ops->ndo_hwtstamp_set)
+ return -EOPNOTSUPP;
+
+ if (!tb[ETHTOOL_A_TS_LAYER])
+ return 0;
+
+ return 1;
+}
+
+static int ethnl_set_ts(struct ethnl_req_info *req_info, struct genl_info *info)
+{
+ struct net_device *dev = req_info->dev;
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+ struct kernel_hwtstamp_config config = {0};
+ struct nlattr **tb = info->attrs;
+ enum timestamping_layer ts_layer;
+ bool mod = false;
+ int ret;
+
+ ts_layer = dev->ts_layer;
+ ethnl_update_u32(&ts_layer, tb[ETHTOOL_A_TS_LAYER], &mod);
+
+ if (!mod)
+ return 0;
+
+ if (ts_layer == SOFTWARE_TIMESTAMPING) {
+ struct ethtool_ts_info ts_info = {0};
+
+ if (!ops->get_ts_info) {
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ tb[ETHTOOL_A_TS_LAYER],
+ "this net device cannot support timestamping");
+ return -EINVAL;
+ }
+
+ ops->get_ts_info(dev, &ts_info);
+ if ((ts_info.so_timestamping &
+ SOF_TIMESTAMPING_SOFTWARE_MASK) !=
+ SOF_TIMESTAMPING_SOFTWARE_MASK) {
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ tb[ETHTOOL_A_TS_LAYER],
+ "this net device cannot support software timestamping");
+ return -EINVAL;
+ }
+ } else if (ts_layer == MAC_TIMESTAMPING) {
+ struct ethtool_ts_info ts_info = {0};
+
+ if (!ops->get_ts_info) {
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ tb[ETHTOOL_A_TS_LAYER],
+ "this net device cannot support timestamping");
+ return -EINVAL;
+ }
+
+ ops->get_ts_info(dev, &ts_info);
+ if ((ts_info.so_timestamping &
+ SOF_TIMESTAMPING_HARDWARE_MASK) !=
+ SOF_TIMESTAMPING_HARDWARE_MASK) {
+ NL_SET_ERR_MSG_ATTR(info->extack,
+ tb[ETHTOOL_A_TS_LAYER],
+ "this net device cannot support hardware timestamping");
+ return -EINVAL;
+ }
+ } else if (ts_layer == PHY_TIMESTAMPING && !phy_has_tsinfo(dev->phydev)) {
+ NL_SET_ERR_MSG_ATTR(info->extack, tb[ETHTOOL_A_TS_LAYER],
+ "this phy device cannot support timestamping");
+ return -EINVAL;
+ }
+
+ /* Disable time stamping in the current layer. */
+ if (netif_device_present(dev) &&
+ (dev->ts_layer == PHY_TIMESTAMPING ||
+ dev->ts_layer == MAC_TIMESTAMPING)) {
+ ret = dev_set_hwtstamp_phylib(dev, &config, info->extack);
+ if (ret < 0)
+ return ret;
+ }
+
+ dev->ts_layer = ts_layer;
+
+ return 1;
+}
+
const struct ethnl_request_ops ethnl_ts_request_ops = {
.request_cmd = ETHTOOL_MSG_TS_GET,
.reply_cmd = ETHTOOL_MSG_TS_GET_REPLY,
@@ -69,6 +165,9 @@ const struct ethnl_request_ops ethnl_ts_request_ops = {
.prepare_data = ts_prepare_data,
.reply_size = ts_reply_size,
.fill_reply = ts_fill_reply,
+
+ .set_validate = ethnl_set_ts_validate,
+ .set = ethnl_set_ts,
};

/* TS_LIST_GET */

--
2.25.1

2023-10-19 14:31:05

by Kory Maincent

Subject: [PATCH net-next v6 05/16] net: Make dev_set_hwtstamp_phylib accessible

Make the dev_set_hwtstamp_phylib function accessible in prevision to use
it from ethtool to reset the tstamp current configuration.

Signed-off-by: Kory Maincent <[email protected]>
---

Change in v6:
- Add missing EXPORT_SYMBOL_GPL call.
---
include/linux/netdevice.h | 3 +++
net/core/dev_ioctl.c | 7 ++++---
2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index e070a4540fba..b9d0411836db 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3922,6 +3922,9 @@ int generic_hwtstamp_get_lower(struct net_device *dev,
int generic_hwtstamp_set_lower(struct net_device *dev,
struct kernel_hwtstamp_config *kernel_cfg,
struct netlink_ext_ack *extack);
+int dev_set_hwtstamp_phylib(struct net_device *dev,
+ struct kernel_hwtstamp_config *cfg,
+ struct netlink_ext_ack *extack);
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/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index b46aedc36939..cb60b0b9c31d 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -322,9 +322,9 @@ static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr)
* frames and not forward them), it must set IFF_SEE_ALL_HWTSTAMP_REQUESTS in
* dev->priv_flags.
*/
-static int dev_set_hwtstamp_phylib(struct net_device *dev,
- struct kernel_hwtstamp_config *cfg,
- struct netlink_ext_ack *extack)
+int dev_set_hwtstamp_phylib(struct net_device *dev,
+ struct kernel_hwtstamp_config *cfg,
+ struct netlink_ext_ack *extack)
{
const struct net_device_ops *ops = dev->netdev_ops;
bool phy_ts = phy_has_hwtstamp(dev->phydev);
@@ -363,6 +363,7 @@ static int dev_set_hwtstamp_phylib(struct net_device *dev,

return 0;
}
+EXPORT_SYMBOL_GPL(dev_set_hwtstamp_phylib);

static int dev_set_hwtstamp(struct net_device *dev, struct ifreq *ifr)
{

--
2.25.1

2023-10-19 14:31:06

by Kory Maincent

Subject: [PATCH net-next v6 13/16] net: Change the API of PHY default timestamp to MAC

Change the API to select MAC default time stamping instead of the PHY.
Indeed the PHY is closer to the wire therefore theoretically it has less
delay than the MAC timestamping but the reality is different. Due to lower
time stamping clock frequency, latency in the MDIO bus and no PHC hardware
synchronization between different PHY, the PHY PTP is often less precise
than the MAC. The exception is for PHY designed specially for PTP case but
these devices are not very widespread. For not breaking the compatibility I
introduce a default_timestamp flag in phy_device that is set by the phy
driver to know we are using the old API behavior.

The phy_set_timestamp function is called at each call of phy_attach_direct.
In case of MAC driver using phylink this function is called when the
interface is turned up. Then if the interface goes down and up again the
last choice of timestamp will be overwritten by the default choice.
A solution could be to cache the timestamp status but it can bring other
issues. In case of SFP, if we change the module, it doesn't make sense to
blindly re-set the timestamp back to PHY, if the new module has a PHY with
mediocre timestamping capabilities.

Signed-off-by: Kory Maincent <[email protected]>
---

Changes in v5:
- Extract the API change in this patch.
- Rename whitelist to allowlist.
- Set NETDEV_TIMESTAMPING in register_netdevice function.
- Add software timestamping case description in ts_info.

Change in v6:
- Replace the allowlist phy with a default_timestamp flag to know which
phy is using old API behavior.
- Fix dereferenced of a possible null pointer.
- Follow timestamping layer naming update.
- Update timestamp default set between MAC and software.
- Update ts_info returned in case of software timestamping.
---
drivers/net/phy/bcm-phy-ptp.c | 3 +++
drivers/net/phy/dp83640.c | 3 +++
drivers/net/phy/micrel.c | 6 ++++++
drivers/net/phy/mscc/mscc_ptp.c | 2 ++
drivers/net/phy/nxp-c45-tja11xx.c | 3 +++
drivers/net/phy/phy_device.c | 37 +++++++++++++++++++++++++++++++++++++
include/linux/netdevice.h | 5 +++++
include/linux/phy.h | 4 ++++
net/core/dev.c | 3 +++
net/core/dev_ioctl.c | 36 ++++++++++++++++++++++--------------
net/core/timestamping.c | 10 ++++++++++
net/ethtool/common.c | 19 +++++++++++++++++--
12 files changed, 115 insertions(+), 16 deletions(-)

diff --git a/drivers/net/phy/bcm-phy-ptp.c b/drivers/net/phy/bcm-phy-ptp.c
index 0beae8f81ffa..92ffc542a823 100644
--- a/drivers/net/phy/bcm-phy-ptp.c
+++ b/drivers/net/phy/bcm-phy-ptp.c
@@ -931,6 +931,9 @@ struct bcm_ptp_private *bcm_ptp_probe(struct phy_device *phydev)
return ERR_CAST(clock);
priv->ptp_clock = clock;

+ /* Timestamp selected by default to keep legacy API */
+ phydev->default_timestamp = true;
+
priv->phydev = phydev;
bcm_ptp_init(priv);

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 5c42c47dc564..64fd1a109c0f 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -1450,6 +1450,9 @@ static int dp83640_probe(struct phy_device *phydev)
phydev->mii_ts = &dp83640->mii_ts;
phydev->priv = dp83640;

+ /* Timestamp selected by default to keep legacy API */
+ phydev->default_timestamp = true;
+
spin_lock_init(&dp83640->rx_lock);
skb_queue_head_init(&dp83640->rx_queue);
skb_queue_head_init(&dp83640->tx_queue);
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 4c115e55ffc0..e50174587899 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -3136,6 +3136,9 @@ static void lan8814_ptp_init(struct phy_device *phydev)
ptp_priv->mii_ts.ts_info = lan8814_ts_info;

phydev->mii_ts = &ptp_priv->mii_ts;
+
+ /* Timestamp selected by default to keep legacy API */
+ phydev->default_timestamp = true;
}

static int lan8814_ptp_probe_once(struct phy_device *phydev)
@@ -4564,6 +4567,9 @@ static int lan8841_probe(struct phy_device *phydev)

phydev->mii_ts = &ptp_priv->mii_ts;

+ /* Timestamp selected by default to keep legacy API */
+ phydev->default_timestamp = true;
+
return 0;
}

diff --git a/drivers/net/phy/mscc/mscc_ptp.c b/drivers/net/phy/mscc/mscc_ptp.c
index eb0b032cb613..fd174eb06d4a 100644
--- a/drivers/net/phy/mscc/mscc_ptp.c
+++ b/drivers/net/phy/mscc/mscc_ptp.c
@@ -1570,6 +1570,8 @@ int vsc8584_ptp_probe(struct phy_device *phydev)
return PTR_ERR(vsc8531->load_save);
}

+ /* Timestamp selected by default to keep legacy API */
+ phydev->default_timestamp = true;
vsc8531->ptp->phydev = phydev;

return 0;
diff --git a/drivers/net/phy/nxp-c45-tja11xx.c b/drivers/net/phy/nxp-c45-tja11xx.c
index 780ad353cf55..0515c7b979db 100644
--- a/drivers/net/phy/nxp-c45-tja11xx.c
+++ b/drivers/net/phy/nxp-c45-tja11xx.c
@@ -1658,6 +1658,9 @@ static int nxp_c45_probe(struct phy_device *phydev)
priv->mii_ts.ts_info = nxp_c45_ts_info;
phydev->mii_ts = &priv->mii_ts;
ret = nxp_c45_init_ptp_clock(priv);
+
+ /* Timestamp selected by default to keep legacy API */
+ phydev->default_timestamp = true;
} else {
phydev_dbg(phydev, "PTP support not enabled even if the phy supports it");
}
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 2ce74593d6e4..8c4794631daa 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1411,6 +1411,26 @@ int phy_sfp_probe(struct phy_device *phydev,
}
EXPORT_SYMBOL(phy_sfp_probe);

+/**
+ * phy_set_timestamp - set the default selected timestamping device
+ * @dev: Pointer to net_device
+ * @phydev: Pointer to phy_device
+ *
+ * This is used to set default timestamping device taking into account
+ * the new API choice, which is selecting the timestamping from MAC by
+ * default if the phydev does not have default_timestamp flag enabled.
+ */
+static void phy_set_timestamp(struct net_device *dev, struct phy_device *phydev)
+{
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+
+ if (!phy_has_tsinfo(phydev))
+ return;
+
+ if (!ops->get_ts_info || phydev->default_timestamp)
+ dev->ts_layer = PHY_TIMESTAMPING;
+}
+
/**
* phy_attach_direct - attach a network device to a given PHY device pointer
* @dev: network device to attach
@@ -1484,6 +1504,7 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,

phydev->phy_link_change = phy_link_change;
if (dev) {
+ phy_set_timestamp(dev, phydev);
phydev->attached_dev = dev;
dev->phydev = phydev;

@@ -1812,6 +1833,22 @@ void phy_detach(struct phy_device *phydev)

phy_suspend(phydev);
if (dev) {
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+ struct ethtool_ts_info ts_info = {0};
+
+ if (ops->get_ts_info) {
+ ops->get_ts_info(dev, &ts_info);
+ if ((ts_info.so_timestamping &
+ SOF_TIMESTAMPING_HARDWARE_MASK) ==
+ SOF_TIMESTAMPING_HARDWARE_MASK)
+ dev->ts_layer = MAC_TIMESTAMPING;
+ else if ((ts_info.so_timestamping &
+ SOF_TIMESTAMPING_SOFTWARE_MASK) ==
+ SOF_TIMESTAMPING_SOFTWARE_MASK)
+ dev->ts_layer = SOFTWARE_TIMESTAMPING;
+ } else {
+ dev->ts_layer = NO_TIMESTAMPING;
+ }
phydev->attached_dev->phydev = NULL;
phydev->attached_dev = NULL;
}
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index b9d0411836db..52f57008a2dd 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -47,6 +47,7 @@
#include <uapi/linux/if_bonding.h>
#include <uapi/linux/pkt_cls.h>
#include <uapi/linux/netdev.h>
+#include <uapi/linux/net_tstamp.h>
#include <linux/hashtable.h>
#include <linux/rbtree.h>
#include <net/net_trackers.h>
@@ -2054,6 +2055,8 @@ enum netdev_ml_priv_type {
*
* @dpll_pin: Pointer to the SyncE source pin of a DPLL subsystem,
* where the clock is recovered.
+ * @ts_layer: Tracks which network device
+ * performs packet time stamping.
*
* FIXME: cleanup struct net_device such that network protocol info
* moves out.
@@ -2415,6 +2418,8 @@ struct net_device {
#if IS_ENABLED(CONFIG_DPLL)
struct dpll_pin *dpll_pin;
#endif
+
+ enum timestamping_layer ts_layer;
};
#define to_net_dev(d) container_of(d, struct net_device, dev)

diff --git a/include/linux/phy.h b/include/linux/phy.h
index e5f1f41e399c..317def2a7843 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -604,6 +604,8 @@ struct macsec_ops;
* handling shall be postponed until PHY has resumed
* @irq_rerun: Flag indicating interrupts occurred while PHY was suspended,
* requiring a rerun of the interrupt handler after resume
+ * @default_timestamp: Flag indicating whether we are using the phy
+ * timestamp as the default one
* @interface: enum phy_interface_t value
* @skb: Netlink message for cable diagnostics
* @nest: Netlink nest used for cable diagnostics
@@ -667,6 +669,8 @@ struct phy_device {
unsigned irq_suspended:1;
unsigned irq_rerun:1;

+ unsigned default_timestamp:1;
+
int rate_matching;

enum phy_state state;
diff --git a/net/core/dev.c b/net/core/dev.c
index 606a366cc209..cef613e31ba7 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -10204,6 +10204,9 @@ int register_netdevice(struct net_device *dev)
dev->rtnl_link_state == RTNL_LINK_INITIALIZED)
rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U, GFP_KERNEL, 0, NULL);

+ if (dev->ethtool_ops->get_ts_info)
+ dev->ts_layer = MAC_TIMESTAMPING;
+
out:
return ret;

diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index 57d9f25f16b8..8d510344c885 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -259,9 +259,7 @@ static int dev_eth_ioctl(struct net_device *dev,
* @dev: Network device
* @cfg: Timestamping configuration structure
*
- * Helper for enforcing a common policy that phylib timestamping, if available,
- * should take precedence in front of hardware timestamping provided by the
- * netdev.
+ * Helper for calling the selected hardware provider timestamping.
*
* Note: phy_mii_ioctl() only handles SIOCSHWTSTAMP (not SIOCGHWTSTAMP), and
* there only exists a phydev->mii_ts->hwtstamp() method. So this will return
@@ -271,10 +269,14 @@ static int dev_eth_ioctl(struct net_device *dev,
static int dev_get_hwtstamp_phylib(struct net_device *dev,
struct kernel_hwtstamp_config *cfg)
{
- if (phy_has_hwtstamp(dev->phydev))
+ enum timestamping_layer ts_layer = dev->ts_layer;
+
+ if (ts_layer == PHY_TIMESTAMPING)
return phy_hwtstamp_get(dev->phydev, cfg);
+ else if (ts_layer == MAC_TIMESTAMPING)
+ return dev->netdev_ops->ndo_hwtstamp_get(dev, cfg);

- return dev->netdev_ops->ndo_hwtstamp_get(dev, cfg);
+ return -EOPNOTSUPP;
}

static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr)
@@ -315,9 +317,8 @@ static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr)
* @cfg: Timestamping configuration structure
* @extack: Netlink extended ack message structure, for error reporting
*
- * Helper for enforcing a common policy that phylib timestamping, if available,
- * should take precedence in front of hardware timestamping provided by the
- * netdev. If the netdev driver needs to perform specific actions even for PHY
+ * Helper for calling the selected hardware provider timestamping.
+ * If the netdev driver needs to perform specific actions even for PHY
* timestamping to work properly (a switch port must trap the timestamped
* frames and not forward them), it must set IFF_SEE_ALL_HWTSTAMP_REQUESTS in
* dev->priv_flags.
@@ -327,20 +328,26 @@ int dev_set_hwtstamp_phylib(struct net_device *dev,
struct netlink_ext_ack *extack)
{
const struct net_device_ops *ops = dev->netdev_ops;
- bool phy_ts = phy_has_hwtstamp(dev->phydev);
+ enum timestamping_layer ts_layer = dev->ts_layer;
struct kernel_hwtstamp_config old_cfg = {};
bool changed = false;
int err;

- cfg->source = phy_ts ? PHY_TIMESTAMPING : NET_TIMESTAMPING;
+ cfg->source = ts_layer;
+
+ if (ts_layer != PHY_TIMESTAMPING &&
+ ts_layer != MAC_TIMESTAMPING)
+ return -EOPNOTSUPP;

- if (phy_ts && (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) {
+ if (ts_layer == PHY_TIMESTAMPING &&
+ dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS) {
err = ops->ndo_hwtstamp_get(dev, &old_cfg);
if (err)
return err;
}

- if (!phy_ts || (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) {
+ if (ts_layer == MAC_TIMESTAMPING ||
+ dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS) {
err = ops->ndo_hwtstamp_set(dev, cfg, extack);
if (err) {
if (extack->_msg)
@@ -349,10 +356,11 @@ int dev_set_hwtstamp_phylib(struct net_device *dev,
}
}

- if (phy_ts && (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS))
+ if (ts_layer == PHY_TIMESTAMPING &&
+ dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)
changed = kernel_hwtstamp_config_changed(&old_cfg, cfg);

- if (phy_ts) {
+ if (ts_layer == PHY_TIMESTAMPING) {
err = phy_hwtstamp_set(dev->phydev, cfg, extack);
if (err) {
if (changed)
diff --git a/net/core/timestamping.c b/net/core/timestamping.c
index 04840697fe79..5cf51a523fb3 100644
--- a/net/core/timestamping.c
+++ b/net/core/timestamping.c
@@ -21,6 +21,7 @@ static unsigned int classify(const struct sk_buff *skb)

void skb_clone_tx_timestamp(struct sk_buff *skb)
{
+ enum timestamping_layer ts_layer;
struct mii_timestamper *mii_ts;
struct sk_buff *clone;
unsigned int type;
@@ -28,6 +29,10 @@ void skb_clone_tx_timestamp(struct sk_buff *skb)
if (!skb->sk)
return;

+ ts_layer = skb->dev->ts_layer;
+ if (ts_layer != PHY_TIMESTAMPING)
+ return;
+
type = classify(skb);
if (type == PTP_CLASS_NONE)
return;
@@ -44,12 +49,17 @@ EXPORT_SYMBOL_GPL(skb_clone_tx_timestamp);

bool skb_defer_rx_timestamp(struct sk_buff *skb)
{
+ enum timestamping_layer ts_layer;
struct mii_timestamper *mii_ts;
unsigned int type;

if (!skb->dev || !skb->dev->phydev || !skb->dev->phydev->mii_ts)
return false;

+ ts_layer = skb->dev->ts_layer;
+ if (ts_layer != PHY_TIMESTAMPING)
+ return false;
+
if (skb_headroom(skb) < ETH_HLEN)
return false;

diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index e2315e24d695..d7ae49879b47 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -633,13 +633,28 @@ int __ethtool_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info)
{
const struct ethtool_ops *ops = dev->ethtool_ops;
struct phy_device *phydev = dev->phydev;
+ enum timestamping_layer ts_layer;
+ int ret;

memset(info, 0, sizeof(*info));
info->cmd = ETHTOOL_GET_TS_INFO;

- if (phy_has_tsinfo(phydev))
+ ts_layer = dev->ts_layer;
+ if (ts_layer == SOFTWARE_TIMESTAMPING) {
+ ret = ops->get_ts_info(dev, info);
+ if (ret)
+ return ret;
+ info->so_timestamping &= ~SOF_TIMESTAMPING_HARDWARE_MASK;
+ info->phc_index = -1;
+ info->rx_filters = 0;
+ info->tx_types = 0;
+ return 0;
+ }
+
+ if (ts_layer == PHY_TIMESTAMPING)
return phy_ts_info(phydev, info);
- if (ops->get_ts_info)
+
+ if (ts_layer == MAC_TIMESTAMPING)
return ops->get_ts_info(dev, info);

info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE |

--
2.25.1

2023-10-19 14:31:08

by Kory Maincent

Subject: [PATCH net-next v6 06/16] net: phy: micrel: fix ts_info value in case of no phc

In case of no phc we should not return SOFTWARE TIMESTAMPING flags as we do
not know whether the netdev supports of timestamping.
Remove it from the lan8841_ts_info and simply return 0.

Signed-off-by: Kory Maincent <[email protected]>
---

This patch is not tested but it seems consistent to me.

Changes in v6:
- Update the commit message.
---
drivers/net/phy/micrel.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 43d072b53839..4c115e55ffc0 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -3607,12 +3607,8 @@ static int lan8841_ts_info(struct mii_timestamper *mii_ts,

info->phc_index = ptp_priv->ptp_clock ?
ptp_clock_index(ptp_priv->ptp_clock) : -1;
- if (info->phc_index == -1) {
- info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE |
- SOF_TIMESTAMPING_RX_SOFTWARE |
- SOF_TIMESTAMPING_SOFTWARE;
+ if (info->phc_index == -1)
return 0;
- }

info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
SOF_TIMESTAMPING_RX_HARDWARE |

--
2.25.1

2023-10-19 14:31:14

by Kory Maincent

Subject: [PATCH net-next v6 07/16] net_tstamp: Add TIMESTAMPING SOFTWARE and HARDWARE mask

Timestamping software or hardware flags are often used as a group,
therefore adding these masks will easier future use.

I did not use SOF_TIMESTAMPING_SYS_HARDWARE flag as it is deprecated and
not use at all.

Signed-off-by: Kory Maincent <[email protected]>
---
include/uapi/linux/net_tstamp.h | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h
index a2c66b3d7f0f..df8091998c8d 100644
--- a/include/uapi/linux/net_tstamp.h
+++ b/include/uapi/linux/net_tstamp.h
@@ -48,6 +48,14 @@ enum {
SOF_TIMESTAMPING_TX_SCHED | \
SOF_TIMESTAMPING_TX_ACK)

+#define SOF_TIMESTAMPING_SOFTWARE_MASK (SOF_TIMESTAMPING_RX_SOFTWARE | \
+ SOF_TIMESTAMPING_TX_SOFTWARE | \
+ SOF_TIMESTAMPING_SOFTWARE)
+
+#define SOF_TIMESTAMPING_HARDWARE_MASK (SOF_TIMESTAMPING_RX_HARDWARE | \
+ SOF_TIMESTAMPING_TX_HARDWARE | \
+ SOF_TIMESTAMPING_RAW_HARDWARE)
+
/**
* struct so_timestamping - SO_TIMESTAMPING parameter
*

--
2.25.1

2023-10-19 14:31:20

by Kory Maincent

Subject: [PATCH net-next v6 14/16] net: ethtool: ts: Update GET_TS to reply the current selected timestamp

As the default selected timestamp API change we have to change also the
timestamp return by ethtool. This patch return now the current selected
timestamp.

Signed-off-by: Kory Maincent <[email protected]>
---
net/ethtool/ts.c | 18 +-----------------
1 file changed, 1 insertion(+), 17 deletions(-)

diff --git a/net/ethtool/ts.c b/net/ethtool/ts.c
index f2dd65a2e69c..bd219512b8de 100644
--- a/net/ethtool/ts.c
+++ b/net/ethtool/ts.c
@@ -31,29 +31,13 @@ static int ts_prepare_data(const struct ethnl_req_info *req_base,
{
struct ts_reply_data *data = TS_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
- const struct ethtool_ops *ops = dev->ethtool_ops;
int ret;

ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;

- if (phy_has_tsinfo(dev->phydev)) {
- data->ts_layer = PHY_TIMESTAMPING;
- } else if (ops->get_ts_info) {
- struct ethtool_ts_info ts_info = {0};
-
- ops->get_ts_info(dev, &ts_info);
- if (ts_info.so_timestamping &
- SOF_TIMESTAMPING_HARDWARE_MASK)
- data->ts_layer = MAC_TIMESTAMPING;
-
- if (ts_info.so_timestamping &
- SOF_TIMESTAMPING_SOFTWARE_MASK)
- data->ts_layer = SOFTWARE_TIMESTAMPING;
- } else {
- data->ts_layer = NO_TIMESTAMPING;
- }
+ data->ts_layer = dev->ts_layer;

ethnl_ops_complete(dev);


--
2.25.1

2023-10-19 14:31:20

by Kory Maincent

Subject: [PATCH net-next v6 01/16] net: Convert PHYs hwtstamp callback to use kernel_hwtstamp_config

The PHYs hwtstamp callback are still getting the timestamp config from
ifreq and using copy_from/to_user.
Get rid of these functions by using timestamp configuration in parameter.
This also allow to move on to kernel_hwtstamp_config and be similar to
net devices using the new ndo_hwstamp_get/set.

This adds the possibility to manipulate the timestamp configuration
from the kernel which was not possible with the copy_from/to_user.

Signed-off-by: Kory Maincent <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
---

Change in v6:
- Fix nxp_c45_hwtstamp config variable missing
---
drivers/net/phy/bcm-phy-ptp.c | 15 ++++++---------
drivers/net/phy/dp83640.c | 24 +++++++++++-------------
drivers/net/phy/micrel.c | 38 +++++++++++++++++---------------------
drivers/net/phy/mscc/mscc_ptp.c | 18 ++++++++----------
drivers/net/phy/nxp-c45-tja11xx.c | 17 +++++++----------
drivers/net/phy/phy.c | 21 +++++++++++++++++++--
drivers/ptp/ptp_ines.c | 16 +++++++---------
include/linux/mii_timestamper.h | 4 +++-
include/linux/phy.h | 6 ++++--
9 files changed, 82 insertions(+), 77 deletions(-)

diff --git a/drivers/net/phy/bcm-phy-ptp.c b/drivers/net/phy/bcm-phy-ptp.c
index ef00d6163061..0beae8f81ffa 100644
--- a/drivers/net/phy/bcm-phy-ptp.c
+++ b/drivers/net/phy/bcm-phy-ptp.c
@@ -782,16 +782,13 @@ static void bcm_ptp_txtstamp(struct mii_timestamper *mii_ts,
}

static int bcm_ptp_hwtstamp(struct mii_timestamper *mii_ts,
- struct ifreq *ifr)
+ struct kernel_hwtstamp_config *cfg,
+ struct netlink_ext_ack *extack)
{
struct bcm_ptp_private *priv = mii2priv(mii_ts);
- struct hwtstamp_config cfg;
u16 mode, ctrl;

- if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
- return -EFAULT;
-
- switch (cfg.rx_filter) {
+ switch (cfg->rx_filter) {
case HWTSTAMP_FILTER_NONE:
priv->hwts_rx = false;
break;
@@ -804,14 +801,14 @@ static int bcm_ptp_hwtstamp(struct mii_timestamper *mii_ts,
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
- cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
+ cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
priv->hwts_rx = true;
break;
default:
return -ERANGE;
}

- priv->tx_type = cfg.tx_type;
+ priv->tx_type = cfg->tx_type;

ctrl = priv->hwts_rx ? SLICE_RX_EN : 0;
ctrl |= priv->tx_type != HWTSTAMP_TX_OFF ? SLICE_TX_EN : 0;
@@ -840,7 +837,7 @@ static int bcm_ptp_hwtstamp(struct mii_timestamper *mii_ts,
/* purge existing data */
skb_queue_purge(&priv->tx_queue);

- return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+ return 0;
}

static int bcm_ptp_ts_info(struct mii_timestamper *mii_ts,
diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 2657be7cc049..5c42c47dc564 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -1207,22 +1207,20 @@ static irqreturn_t dp83640_handle_interrupt(struct phy_device *phydev)
return IRQ_HANDLED;
}

-static int dp83640_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
+static int dp83640_hwtstamp(struct mii_timestamper *mii_ts,
+ struct kernel_hwtstamp_config *cfg,
+ struct netlink_ext_ack *extack)
{
struct dp83640_private *dp83640 =
container_of(mii_ts, struct dp83640_private, mii_ts);
- struct hwtstamp_config cfg;
u16 txcfg0, rxcfg0;

- if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
- return -EFAULT;
-
- if (cfg.tx_type < 0 || cfg.tx_type > HWTSTAMP_TX_ONESTEP_SYNC)
+ if (cfg->tx_type < 0 || cfg->tx_type > HWTSTAMP_TX_ONESTEP_SYNC)
return -ERANGE;

- dp83640->hwts_tx_en = cfg.tx_type;
+ dp83640->hwts_tx_en = cfg->tx_type;

- switch (cfg.rx_filter) {
+ switch (cfg->rx_filter) {
case HWTSTAMP_FILTER_NONE:
dp83640->hwts_rx_en = 0;
dp83640->layer = 0;
@@ -1234,7 +1232,7 @@ static int dp83640_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
dp83640->hwts_rx_en = 1;
dp83640->layer = PTP_CLASS_L4;
dp83640->version = PTP_CLASS_V1;
- cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
+ cfg->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
break;
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
@@ -1242,7 +1240,7 @@ static int dp83640_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
dp83640->hwts_rx_en = 1;
dp83640->layer = PTP_CLASS_L4;
dp83640->version = PTP_CLASS_V2;
- cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
+ cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
break;
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
@@ -1250,7 +1248,7 @@ static int dp83640_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
dp83640->hwts_rx_en = 1;
dp83640->layer = PTP_CLASS_L2;
dp83640->version = PTP_CLASS_V2;
- cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+ cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
break;
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
@@ -1258,7 +1256,7 @@ static int dp83640_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
dp83640->hwts_rx_en = 1;
dp83640->layer = PTP_CLASS_L4 | PTP_CLASS_L2;
dp83640->version = PTP_CLASS_V2;
- cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
+ cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
break;
default:
return -ERANGE;
@@ -1292,7 +1290,7 @@ static int dp83640_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)

mutex_unlock(&dp83640->clock->extreg_lock);

- return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+ return 0;
}

static void rx_timestamp_work(struct work_struct *work)
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index 927d3d54658e..43d072b53839 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -2373,24 +2373,22 @@ static void lan8814_flush_fifo(struct phy_device *phydev, bool egress)
lanphy_read_page_reg(phydev, 5, PTP_TSU_INT_STS);
}

-static int lan8814_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
+static int lan8814_hwtstamp(struct mii_timestamper *mii_ts,
+ struct kernel_hwtstamp_config *config,
+ struct netlink_ext_ack *extack)
{
struct kszphy_ptp_priv *ptp_priv =
container_of(mii_ts, struct kszphy_ptp_priv, mii_ts);
struct phy_device *phydev = ptp_priv->phydev;
struct lan8814_shared_priv *shared = phydev->shared->priv;
struct lan8814_ptp_rx_ts *rx_ts, *tmp;
- struct hwtstamp_config config;
int txcfg = 0, rxcfg = 0;
int pkt_ts_enable;

- if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
- return -EFAULT;
+ ptp_priv->hwts_tx_type = config->tx_type;
+ ptp_priv->rx_filter = config->rx_filter;

- ptp_priv->hwts_tx_type = config.tx_type;
- ptp_priv->rx_filter = config.rx_filter;
-
- switch (config.rx_filter) {
+ switch (config->rx_filter) {
case HWTSTAMP_FILTER_NONE:
ptp_priv->layer = 0;
ptp_priv->version = 0;
@@ -2436,13 +2434,13 @@ static int lan8814_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD,
PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_);

- if (config.rx_filter != HWTSTAMP_FILTER_NONE)
+ if (config->rx_filter != HWTSTAMP_FILTER_NONE)
lan8814_config_ts_intr(ptp_priv->phydev, true);
else
lan8814_config_ts_intr(ptp_priv->phydev, false);

mutex_lock(&shared->shared_lock);
- if (config.rx_filter != HWTSTAMP_FILTER_NONE)
+ if (config->rx_filter != HWTSTAMP_FILTER_NONE)
shared->ref++;
else
shared->ref--;
@@ -2466,7 +2464,7 @@ static int lan8814_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
lan8814_flush_fifo(ptp_priv->phydev, false);
lan8814_flush_fifo(ptp_priv->phydev, true);

- return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? -EFAULT : 0;
+ return 0;
}

static void lan8814_txtstamp(struct mii_timestamper *mii_ts,
@@ -3681,21 +3679,19 @@ static void lan8841_ptp_enable_processing(struct kszphy_ptp_priv *ptp_priv,
#define LAN8841_PTP_TX_TIMESTAMP_EN 443
#define LAN8841_PTP_TX_MOD 445

-static int lan8841_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
+static int lan8841_hwtstamp(struct mii_timestamper *mii_ts,
+ struct kernel_hwtstamp_config *config,
+ struct netlink_ext_ack *extack)
{
struct kszphy_ptp_priv *ptp_priv = container_of(mii_ts, struct kszphy_ptp_priv, mii_ts);
struct phy_device *phydev = ptp_priv->phydev;
- struct hwtstamp_config config;
int txcfg = 0, rxcfg = 0;
int pkt_ts_enable;

- if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
- return -EFAULT;
+ ptp_priv->hwts_tx_type = config->tx_type;
+ ptp_priv->rx_filter = config->rx_filter;

- ptp_priv->hwts_tx_type = config.tx_type;
- ptp_priv->rx_filter = config.rx_filter;
-
- switch (config.rx_filter) {
+ switch (config->rx_filter) {
case HWTSTAMP_FILTER_NONE:
ptp_priv->layer = 0;
ptp_priv->version = 0;
@@ -3749,13 +3745,13 @@ static int lan8841_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)

/* Now enable/disable the timestamping */
lan8841_ptp_enable_processing(ptp_priv,
- config.rx_filter != HWTSTAMP_FILTER_NONE);
+ config->rx_filter != HWTSTAMP_FILTER_NONE);

skb_queue_purge(&ptp_priv->tx_queue);

lan8841_ptp_flush_fifo(ptp_priv);

- return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ? -EFAULT : 0;
+ return 0;
}

static bool lan8841_rxtstamp(struct mii_timestamper *mii_ts,
diff --git a/drivers/net/phy/mscc/mscc_ptp.c b/drivers/net/phy/mscc/mscc_ptp.c
index cf728bfd83e2..eb0b032cb613 100644
--- a/drivers/net/phy/mscc/mscc_ptp.c
+++ b/drivers/net/phy/mscc/mscc_ptp.c
@@ -1045,19 +1045,17 @@ static void vsc85xx_ts_reset_fifo(struct phy_device *phydev)
val);
}

-static int vsc85xx_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
+static int vsc85xx_hwtstamp(struct mii_timestamper *mii_ts,
+ struct kernel_hwtstamp_config *cfg,
+ struct netlink_ext_ack *extack)
{
struct vsc8531_private *vsc8531 =
container_of(mii_ts, struct vsc8531_private, mii_ts);
struct phy_device *phydev = vsc8531->ptp->phydev;
- struct hwtstamp_config cfg;
bool one_step = false;
u32 val;

- if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
- return -EFAULT;
-
- switch (cfg.tx_type) {
+ switch (cfg->tx_type) {
case HWTSTAMP_TX_ONESTEP_SYNC:
one_step = true;
break;
@@ -1069,9 +1067,9 @@ static int vsc85xx_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
return -ERANGE;
}

- vsc8531->ptp->tx_type = cfg.tx_type;
+ vsc8531->ptp->tx_type = cfg->tx_type;

- switch (cfg.rx_filter) {
+ switch (cfg->rx_filter) {
case HWTSTAMP_FILTER_NONE:
break;
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
@@ -1084,7 +1082,7 @@ static int vsc85xx_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
return -ERANGE;
}

- vsc8531->ptp->rx_filter = cfg.rx_filter;
+ vsc8531->ptp->rx_filter = cfg->rx_filter;

mutex_lock(&vsc8531->ts_lock);

@@ -1132,7 +1130,7 @@ static int vsc85xx_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
vsc8531->ptp->configured = 1;
mutex_unlock(&vsc8531->ts_lock);

- return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+ return 0;
}

static int vsc85xx_ts_info(struct mii_timestamper *mii_ts,
diff --git a/drivers/net/phy/nxp-c45-tja11xx.c b/drivers/net/phy/nxp-c45-tja11xx.c
index 7ab080ff02df..780ad353cf55 100644
--- a/drivers/net/phy/nxp-c45-tja11xx.c
+++ b/drivers/net/phy/nxp-c45-tja11xx.c
@@ -1022,24 +1022,21 @@ static bool nxp_c45_rxtstamp(struct mii_timestamper *mii_ts,
}

static int nxp_c45_hwtstamp(struct mii_timestamper *mii_ts,
- struct ifreq *ifreq)
+ struct kernel_hwtstamp_config *cfg,
+ struct netlink_ext_ack *extack)
{
struct nxp_c45_phy *priv = container_of(mii_ts, struct nxp_c45_phy,
mii_ts);
struct phy_device *phydev = priv->phydev;
const struct nxp_c45_phy_data *data;
- struct hwtstamp_config cfg;

- if (copy_from_user(&cfg, ifreq->ifr_data, sizeof(cfg)))
- return -EFAULT;
-
- if (cfg.tx_type < 0 || cfg.tx_type > HWTSTAMP_TX_ON)
+ if (cfg->tx_type < 0 || cfg->tx_type > HWTSTAMP_TX_ON)
return -ERANGE;

data = nxp_c45_get_data(phydev);
- priv->hwts_tx = cfg.tx_type;
+ priv->hwts_tx = cfg->tx_type;

- switch (cfg.rx_filter) {
+ switch (cfg->rx_filter) {
case HWTSTAMP_FILTER_NONE:
priv->hwts_rx = 0;
break;
@@ -1047,7 +1044,7 @@ static int nxp_c45_hwtstamp(struct mii_timestamper *mii_ts,
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
priv->hwts_rx = 1;
- cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+ cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
break;
default:
return -ERANGE;
@@ -1074,7 +1071,7 @@ static int nxp_c45_hwtstamp(struct mii_timestamper *mii_ts,
nxp_c45_clear_reg_field(phydev, &data->regmap->irq_egr_ts_en);

nxp_c45_no_ptp_irq:
- return copy_to_user(ifreq->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+ return 0;
}

static int nxp_c45_ts_info(struct mii_timestamper *mii_ts,
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index a5fa077650e8..d058316666ba 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -325,9 +325,13 @@ EXPORT_SYMBOL(phy_ethtool_ksettings_get);
int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
{
struct mii_ioctl_data *mii_data = if_mii(ifr);
+ struct kernel_hwtstamp_config kernel_cfg;
+ struct netlink_ext_ack extack = {};
u16 val = mii_data->val_in;
bool change_autoneg = false;
+ struct hwtstamp_config cfg;
int prtad, devad;
+ int ret;

switch (cmd) {
case SIOCGMIIPHY:
@@ -411,8 +415,21 @@ int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
return 0;

case SIOCSHWTSTAMP:
- if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
- return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
+ if (phydev->mii_ts && phydev->mii_ts->hwtstamp) {
+ if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
+ return -EFAULT;
+
+ hwtstamp_config_to_kernel(&kernel_cfg, &cfg);
+ ret = phydev->mii_ts->hwtstamp(phydev->mii_ts, &kernel_cfg, &extack);
+ if (ret)
+ return ret;
+
+ hwtstamp_config_from_kernel(&cfg, &kernel_cfg);
+ if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)))
+ return -EFAULT;
+
+ return 0;
+ }
fallthrough;

default:
diff --git a/drivers/ptp/ptp_ines.c b/drivers/ptp/ptp_ines.c
index ed215b458183..1d2940a78455 100644
--- a/drivers/ptp/ptp_ines.c
+++ b/drivers/ptp/ptp_ines.c
@@ -328,17 +328,15 @@ static u64 ines_find_txts(struct ines_port *port, struct sk_buff *skb)
return ns;
}

-static int ines_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
+static int ines_hwtstamp(struct mii_timestamper *mii_ts,
+ struct kernel_hwtstamp_config *cfg,
+ struct netlink_ext_ack *extack)
{
struct ines_port *port = container_of(mii_ts, struct ines_port, mii_ts);
u32 cm_one_step = 0, port_conf, ts_stat_rx, ts_stat_tx;
- struct hwtstamp_config cfg;
unsigned long flags;

- if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
- return -EFAULT;
-
- switch (cfg.tx_type) {
+ switch (cfg->tx_type) {
case HWTSTAMP_TX_OFF:
ts_stat_tx = 0;
break;
@@ -353,7 +351,7 @@ static int ines_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
return -ERANGE;
}

- switch (cfg.rx_filter) {
+ switch (cfg->rx_filter) {
case HWTSTAMP_FILTER_NONE:
ts_stat_rx = 0;
break;
@@ -372,7 +370,7 @@ static int ines_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
ts_stat_rx = TS_ENABLE;
- cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
+ cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
break;
default:
return -ERANGE;
@@ -393,7 +391,7 @@ static int ines_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)

spin_unlock_irqrestore(&port->lock, flags);

- return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+ return 0;
}

static void ines_link_state(struct mii_timestamper *mii_ts,
diff --git a/include/linux/mii_timestamper.h b/include/linux/mii_timestamper.h
index fa940bbaf8ae..26b04f73f214 100644
--- a/include/linux/mii_timestamper.h
+++ b/include/linux/mii_timestamper.h
@@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/ethtool.h>
#include <linux/skbuff.h>
+#include <linux/net_tstamp.h>

struct phy_device;

@@ -51,7 +52,8 @@ struct mii_timestamper {
struct sk_buff *skb, int type);

int (*hwtstamp)(struct mii_timestamper *mii_ts,
- struct ifreq *ifreq);
+ struct kernel_hwtstamp_config *kernel_config,
+ struct netlink_ext_ack *extack);

void (*link_state)(struct mii_timestamper *mii_ts,
struct phy_device *phydev);
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 3cc52826f18e..e5f1f41e399c 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1560,9 +1560,11 @@ static inline bool phy_has_txtstamp(struct phy_device *phydev)
return phydev && phydev->mii_ts && phydev->mii_ts->txtstamp;
}

-static inline int phy_hwtstamp(struct phy_device *phydev, struct ifreq *ifr)
+static inline int phy_hwtstamp(struct phy_device *phydev,
+ struct kernel_hwtstamp_config *cfg,
+ struct netlink_ext_ack *extack)
{
- return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
+ return phydev->mii_ts->hwtstamp(phydev->mii_ts, cfg, extack);
}

static inline bool phy_rxtstamp(struct phy_device *phydev, struct sk_buff *skb,

--
2.25.1

2023-10-19 14:31:21

by Kory Maincent

Subject: [PATCH net-next v6 04/16] net: macb: Convert to ndo_hwtstamp_get() and ndo_hwtstamp_set()

The hardware timestamping through ndo_eth_ioctl() is going away.
Convert the macb driver to the new API before that can be removed.

Signed-off-by: Kory Maincent <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
---
drivers/net/ethernet/cadence/macb.h | 15 ++++++++----
drivers/net/ethernet/cadence/macb_main.c | 42 +++++++++++++++++++++++++-------
drivers/net/ethernet/cadence/macb_ptp.c | 28 ++++++++-------------
3 files changed, 53 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index 78c972bb1d96..aa5700ac9c00 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -1165,9 +1165,10 @@ struct macb_ptp_info {
int (*get_ts_info)(struct net_device *dev,
struct ethtool_ts_info *info);
int (*get_hwtst)(struct net_device *netdev,
- struct ifreq *ifr);
+ struct kernel_hwtstamp_config *tstamp_config);
int (*set_hwtst)(struct net_device *netdev,
- struct ifreq *ifr, int cmd);
+ struct kernel_hwtstamp_config *tstamp_config,
+ struct netlink_ext_ack *extack);
};

struct macb_pm_data {
@@ -1314,7 +1315,7 @@ struct macb {
struct ptp_clock *ptp_clock;
struct ptp_clock_info ptp_clock_info;
struct tsu_incr tsu_incr;
- struct hwtstamp_config tstamp_config;
+ struct kernel_hwtstamp_config tstamp_config;

/* RX queue filer rule set*/
struct ethtool_rx_fs_list rx_fs_list;
@@ -1363,8 +1364,12 @@ static inline void gem_ptp_do_rxstamp(struct macb *bp, struct sk_buff *skb, stru

gem_ptp_rxstamp(bp, skb, desc);
}
-int gem_get_hwtst(struct net_device *dev, struct ifreq *rq);
-int gem_set_hwtst(struct net_device *dev, struct ifreq *ifr, int cmd);
+
+int gem_get_hwtst(struct net_device *dev,
+ struct kernel_hwtstamp_config *tstamp_config);
+int gem_set_hwtst(struct net_device *dev,
+ struct kernel_hwtstamp_config *tstamp_config,
+ struct netlink_ext_ack *extack);
#else
static inline void gem_ptp_init(struct net_device *ndev) { }
static inline void gem_ptp_remove(struct net_device *ndev) { }
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index cebae0f418f2..898debfd4db3 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3773,18 +3773,38 @@ static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
if (!netif_running(dev))
return -EINVAL;

- if (bp->ptp_info) {
- switch (cmd) {
- case SIOCSHWTSTAMP:
- return bp->ptp_info->set_hwtst(dev, rq, cmd);
- case SIOCGHWTSTAMP:
- return bp->ptp_info->get_hwtst(dev, rq);
- }
- }
-
return phylink_mii_ioctl(bp->phylink, rq, cmd);
}

+static int macb_hwtstamp_get(struct net_device *dev,
+ struct kernel_hwtstamp_config *cfg)
+{
+ struct macb *bp = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ if (!bp->ptp_info)
+ return -EOPNOTSUPP;
+
+ return bp->ptp_info->get_hwtst(dev, cfg);
+}
+
+static int macb_hwtstamp_set(struct net_device *dev,
+ struct kernel_hwtstamp_config *cfg,
+ struct netlink_ext_ack *extack)
+{
+ struct macb *bp = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ if (!bp->ptp_info)
+ return -EOPNOTSUPP;
+
+ return bp->ptp_info->set_hwtst(dev, cfg, extack);
+}
+
static inline void macb_set_txcsum_feature(struct macb *bp,
netdev_features_t features)
{
@@ -3884,6 +3904,8 @@ static const struct net_device_ops macb_netdev_ops = {
#endif
.ndo_set_features = macb_set_features,
.ndo_features_check = macb_features_check,
+ .ndo_hwtstamp_set = macb_hwtstamp_set,
+ .ndo_hwtstamp_get = macb_hwtstamp_get,
};

/* Configure peripheral capabilities according to device tree
@@ -4539,6 +4561,8 @@ static const struct net_device_ops at91ether_netdev_ops = {
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = at91ether_poll_controller,
#endif
+ .ndo_hwtstamp_set = macb_hwtstamp_set,
+ .ndo_hwtstamp_get = macb_hwtstamp_get,
};

static int at91ether_clk_init(struct platform_device *pdev, struct clk **pclk,
diff --git a/drivers/net/ethernet/cadence/macb_ptp.c b/drivers/net/ethernet/cadence/macb_ptp.c
index 51d26fa190d7..a63bf29c4fa8 100644
--- a/drivers/net/ethernet/cadence/macb_ptp.c
+++ b/drivers/net/ethernet/cadence/macb_ptp.c
@@ -374,19 +374,16 @@ static int gem_ptp_set_ts_mode(struct macb *bp,
return 0;
}

-int gem_get_hwtst(struct net_device *dev, struct ifreq *rq)
+int gem_get_hwtst(struct net_device *dev,
+ struct kernel_hwtstamp_config *tstamp_config)
{
- struct hwtstamp_config *tstamp_config;
struct macb *bp = netdev_priv(dev);

- tstamp_config = &bp->tstamp_config;
+ *tstamp_config = bp->tstamp_config;
if ((bp->hw_dma_cap & HW_DMA_CAP_PTP) == 0)
return -EOPNOTSUPP;

- if (copy_to_user(rq->ifr_data, tstamp_config, sizeof(*tstamp_config)))
- return -EFAULT;
- else
- return 0;
+ return 0;
}

static void gem_ptp_set_one_step_sync(struct macb *bp, u8 enable)
@@ -401,22 +398,18 @@ static void gem_ptp_set_one_step_sync(struct macb *bp, u8 enable)
macb_writel(bp, NCR, reg_val & ~MACB_BIT(OSSMODE));
}

-int gem_set_hwtst(struct net_device *dev, struct ifreq *ifr, int cmd)
+int gem_set_hwtst(struct net_device *dev,
+ struct kernel_hwtstamp_config *tstamp_config,
+ struct netlink_ext_ack *extack)
{
enum macb_bd_control tx_bd_control = TSTAMP_DISABLED;
enum macb_bd_control rx_bd_control = TSTAMP_DISABLED;
- struct hwtstamp_config *tstamp_config;
struct macb *bp = netdev_priv(dev);
u32 regval;

- tstamp_config = &bp->tstamp_config;
if ((bp->hw_dma_cap & HW_DMA_CAP_PTP) == 0)
return -EOPNOTSUPP;

- if (copy_from_user(tstamp_config, ifr->ifr_data,
- sizeof(*tstamp_config)))
- return -EFAULT;
-
switch (tstamp_config->tx_type) {
case HWTSTAMP_TX_OFF:
break;
@@ -463,12 +456,11 @@ int gem_set_hwtst(struct net_device *dev, struct ifreq *ifr, int cmd)
return -ERANGE;
}

+ bp->tstamp_config = *tstamp_config;
+
if (gem_ptp_set_ts_mode(bp, tx_bd_control, rx_bd_control) != 0)
return -ERANGE;

- if (copy_to_user(ifr->ifr_data, tstamp_config, sizeof(*tstamp_config)))
- return -EFAULT;
- else
- return 0;
+ return 0;
}


--
2.25.1

2023-10-19 14:31:36

by Kory Maincent

Subject: [PATCH net-next v6 08/16] net: ethtool: Add a command to expose current time stamping layer

Time stamping on network packets may happen either in the MAC or in
the PHY, but not both. In preparation for making the choice
selectable, expose both the current layers via ethtool.

In accordance with the kernel implementation as it stands, the current
layer will always read as "phy" when a PHY time stamping device is
present. Future patches will allow changing the current layer
administratively.

Signed-off-by: Kory Maincent <[email protected]>

---
Changes in v2:
- Move the introduction of selected_timestamping_layer variable in next
patch.

Changes in v3:
- Move on to ethtool instead of syfs

Changes in v4:
- Move on to netlink ethtool instead of ioctl. I am not familiar with
netlink so there might be some code that does not follow the good code
practice.

Changes in v5:
- Rename timestamping layers.
- Set a default value of ts_layer in __ethtool_get_ts_info function.
- Separate TS_GET and TS_LIST_GET ethtool command in two separate patches.
- Update documentation.

Changes in v6:
- Moved back to a timestamping_layer simple enum.
- Moved back to MAC/PHY_TIMESTAMING namings.
- Add SOFTWARE timestamping description.
---
Documentation/networking/ethtool-netlink.rst | 23 ++++++++
include/uapi/linux/ethtool_netlink.h | 14 +++++
include/uapi/linux/net_tstamp.h | 10 ++++
net/ethtool/Makefile | 2 +-
net/ethtool/common.h | 1 +
net/ethtool/netlink.c | 10 ++++
net/ethtool/netlink.h | 2 +
net/ethtool/ts.c | 88 ++++++++++++++++++++++++++++
8 files changed, 149 insertions(+), 1 deletion(-)

diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 2540c70952ff..644b3b764044 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -225,6 +225,7 @@ Userspace to kernel:
``ETHTOOL_MSG_RSS_GET`` get RSS settings
``ETHTOOL_MSG_MM_GET`` get MAC merge layer state
``ETHTOOL_MSG_MM_SET`` set MAC merge layer parameters
+ ``ETHTOOL_MSG_TS_GET`` get current timestamping
===================================== =================================

Kernel to userspace:
@@ -268,6 +269,7 @@ Kernel to userspace:
``ETHTOOL_MSG_PSE_GET_REPLY`` PSE parameters
``ETHTOOL_MSG_RSS_GET_REPLY`` RSS settings
``ETHTOOL_MSG_MM_GET_REPLY`` MAC merge layer status
+ ``ETHTOOL_MSG_TS_GET_REPLY`` current timestamping
======================================== =================================

``GET`` requests are sent by userspace applications to retrieve device
@@ -1994,6 +1996,26 @@ The attributes are propagated to the driver through the following structure:
.. kernel-doc:: include/linux/ethtool.h
:identifiers: ethtool_mm_cfg

+TS_GET
+======
+
+Gets current timestamping.
+
+Request contents:
+
+ ================================= ====== ====================
+ ``ETHTOOL_A_TS_HEADER`` nested request header
+ ================================= ====== ====================
+
+Kernel response contents:
+
+ ======================= ====== ==============================
+ ``ETHTOOL_A_TS_HEADER`` nested reply header
+ ``ETHTOOL_A_TS_LAYER`` u32 current timestamping
+ ======================= ====== ==============================
+
+This command get the current timestamp layer.
+
Request translation
===================

@@ -2100,4 +2122,5 @@ are netlink only.
n/a ``ETHTOOL_MSG_PLCA_GET_STATUS``
n/a ``ETHTOOL_MSG_MM_GET``
n/a ``ETHTOOL_MSG_MM_SET``
+ n/a ``ETHTOOL_MSG_TS_GET``
=================================== =====================================
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 73e2c10dc2cc..cb51136328cf 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_TS_GET,

/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -109,6 +110,7 @@ enum {
ETHTOOL_MSG_PLCA_NTF,
ETHTOOL_MSG_MM_GET_REPLY,
ETHTOOL_MSG_MM_NTF,
+ ETHTOOL_MSG_TS_GET_REPLY,

/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@@ -975,6 +977,18 @@ enum {
ETHTOOL_A_MM_MAX = (__ETHTOOL_A_MM_CNT - 1)
};

+/* TS LAYER */
+
+enum {
+ ETHTOOL_A_TS_UNSPEC,
+ ETHTOOL_A_TS_HEADER, /* nest - _A_HEADER_* */
+ ETHTOOL_A_TS_LAYER, /* u32 */
+
+ /* add new constants above here */
+ __ETHTOOL_A_TS_CNT,
+ ETHTOOL_A_TS_MAX = (__ETHTOOL_A_TS_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h
index df8091998c8d..4551fb3d7720 100644
--- a/include/uapi/linux/net_tstamp.h
+++ b/include/uapi/linux/net_tstamp.h
@@ -13,6 +13,16 @@
#include <linux/types.h>
#include <linux/socket.h> /* for SO_TIMESTAMPING */

+/* Layer of the TIMESTAMPING provider */
+enum timestamping_layer {
+ NO_TIMESTAMPING,
+ SOFTWARE_TIMESTAMPING,
+ MAC_TIMESTAMPING,
+ PHY_TIMESTAMPING,
+
+ __TIMESTAMPING_COUNT,
+};
+
/* SO_TIMESTAMPING flags */
enum {
SOF_TIMESTAMPING_TX_HARDWARE = (1<<0),
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 504f954a1b28..4ea64c080639 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -8,4 +8,4 @@ ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o rss.o \
linkstate.o debug.o wol.o features.o privflags.o rings.o \
channels.o coalesce.o pause.o eee.o tsinfo.o cabletest.o \
tunnels.o fec.o eeprom.o stats.o phc_vclocks.o mm.o \
- module.o pse-pd.o plca.o mm.o
+ module.o pse-pd.o plca.o mm.o ts.o
diff --git a/net/ethtool/common.h b/net/ethtool/common.h
index 28b8aaaf9bcb..a264b635f7d3 100644
--- a/net/ethtool/common.h
+++ b/net/ethtool/common.h
@@ -35,6 +35,7 @@ extern const char wol_mode_names[][ETH_GSTRING_LEN];
extern const char sof_timestamping_names[][ETH_GSTRING_LEN];
extern const char ts_tx_type_names[][ETH_GSTRING_LEN];
extern const char ts_rx_filter_names[][ETH_GSTRING_LEN];
+extern const char ts_layer_names[][ETH_GSTRING_LEN];
extern const char udp_tunnel_type_names[][ETH_GSTRING_LEN];

int __ethtool_get_link(struct net_device *dev);
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 3bbd5afb7b31..561c0931d055 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_TS_GET] = &ethnl_ts_request_ops,
};

static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -1128,6 +1129,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.policy = ethnl_mm_set_policy,
.maxattr = ARRAY_SIZE(ethnl_mm_set_policy) - 1,
},
+ {
+ .cmd = ETHTOOL_MSG_TS_GET,
+ .doit = ethnl_default_doit,
+ .start = ethnl_default_start,
+ .dumpit = ethnl_default_dumpit,
+ .done = ethnl_default_done,
+ .policy = ethnl_ts_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_ts_get_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..1e6085198acc 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -395,6 +395,7 @@ extern const struct ethnl_request_ops ethnl_rss_request_ops;
extern const struct ethnl_request_ops ethnl_plca_cfg_request_ops;
extern const struct ethnl_request_ops ethnl_plca_status_request_ops;
extern const struct ethnl_request_ops ethnl_mm_request_ops;
+extern const struct ethnl_request_ops ethnl_ts_request_ops;

extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1];
extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1];
@@ -441,6 +442,7 @@ 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_ts_get_policy[ETHTOOL_A_TS_HEADER + 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);
diff --git a/net/ethtool/ts.c b/net/ethtool/ts.c
new file mode 100644
index 000000000000..066cb06f4d0b
--- /dev/null
+++ b/net/ethtool/ts.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/net_tstamp.h>
+#include <linux/phy.h>
+
+#include "netlink.h"
+#include "common.h"
+#include "bitset.h"
+
+struct ts_req_info {
+ struct ethnl_req_info base;
+};
+
+struct ts_reply_data {
+ struct ethnl_reply_data base;
+ enum timestamping_layer ts_layer;
+};
+
+#define TS_REPDATA(__reply_base) \
+ container_of(__reply_base, struct ts_reply_data, base)
+
+/* TS_GET */
+const struct nla_policy ethnl_ts_get_policy[] = {
+ [ETHTOOL_A_TS_HEADER] =
+ NLA_POLICY_NESTED(ethnl_header_policy),
+};
+
+static int ts_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ const struct genl_info *info)
+{
+ struct ts_reply_data *data = TS_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+ int ret;
+
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+
+ if (phy_has_tsinfo(dev->phydev)) {
+ data->ts_layer = PHY_TIMESTAMPING;
+ } else if (ops->get_ts_info) {
+ struct ethtool_ts_info ts_info = {0};
+
+ ops->get_ts_info(dev, &ts_info);
+ if (ts_info.so_timestamping &
+ SOF_TIMESTAMPING_HARDWARE_MASK)
+ data->ts_layer = MAC_TIMESTAMPING;
+
+ if (ts_info.so_timestamping &
+ SOF_TIMESTAMPING_SOFTWARE_MASK)
+ data->ts_layer = SOFTWARE_TIMESTAMPING;
+ } else {
+ data->ts_layer = NO_TIMESTAMPING;
+ }
+
+ ethnl_ops_complete(dev);
+
+ return ret;
+}
+
+static int ts_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ return nla_total_size(sizeof(u32));
+}
+
+static int ts_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ struct ts_reply_data *data = TS_REPDATA(reply_base);
+
+ return nla_put_u32(skb, ETHTOOL_A_TS_LAYER, data->ts_layer);
+}
+
+const struct ethnl_request_ops ethnl_ts_request_ops = {
+ .request_cmd = ETHTOOL_MSG_TS_GET,
+ .reply_cmd = ETHTOOL_MSG_TS_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_TS_HEADER,
+ .req_info_size = sizeof(struct ts_req_info),
+ .reply_data_size = sizeof(struct ts_reply_data),
+
+ .prepare_data = ts_prepare_data,
+ .reply_size = ts_reply_size,
+ .fill_reply = ts_fill_reply,
+};

--
2.25.1

2023-10-19 14:31:39

by Kory Maincent

Subject: [PATCH net-next v6 10/16] net: ethtool: Add a command to list available time stamping layers

Introduce a new netlink message that lists all available time stamping
layers on a given interface.

Signed-off-by: Kory Maincent <[email protected]>
---

Changes in v6:
- Fix Documentation typos.
- Follow timestamping layer naming update.
---
Documentation/networking/ethtool-netlink.rst | 23 +++++++++
include/uapi/linux/ethtool_netlink.h | 14 ++++++
net/ethtool/netlink.c | 10 ++++
net/ethtool/netlink.h | 1 +
net/ethtool/ts.c | 73 ++++++++++++++++++++++++++++
5 files changed, 121 insertions(+)

diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 644b3b764044..b8d00676ed82 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -226,6 +226,7 @@ Userspace to kernel:
``ETHTOOL_MSG_MM_GET`` get MAC merge layer state
``ETHTOOL_MSG_MM_SET`` set MAC merge layer parameters
``ETHTOOL_MSG_TS_GET`` get current timestamping
+ ``ETHTOOL_MSG_TS_LIST_GET`` list available timestampings
===================================== =================================

Kernel to userspace:
@@ -270,6 +271,7 @@ Kernel to userspace:
``ETHTOOL_MSG_RSS_GET_REPLY`` RSS settings
``ETHTOOL_MSG_MM_GET_REPLY`` MAC merge layer status
``ETHTOOL_MSG_TS_GET_REPLY`` current timestamping
+ ``ETHTOOL_MSG_TS_LIST_GET_REPLY`` available timestampings
======================================== =================================

``GET`` requests are sent by userspace applications to retrieve device
@@ -2016,6 +2018,26 @@ Kernel response contents:

This command get the current timestamp layer.

+TS_LIST_GET
+===========
+
+Get the list of available timestampings.
+
+Request contents:
+
+ ================================= ====== ====================
+ ``ETHTOOL_A_TS_HEADER`` nested request header
+ ================================= ====== ====================
+
+Kernel response contents:
+
+ =========================== ====== ==============================
+ ``ETHTOOL_A_TS_HEADER`` nested reply header
+ ``ETHTOOL_A_TS_LIST_LAYER`` binary available timestampings
+ =========================== ====== ==============================
+
+This command lists all the possible timestamp layer available.
+
Request translation
===================

@@ -2123,4 +2145,5 @@ are netlink only.
n/a ``ETHTOOL_MSG_MM_GET``
n/a ``ETHTOOL_MSG_MM_SET``
n/a ``ETHTOOL_MSG_TS_GET``
+ n/a ``ETHTOOL_MSG_TS_LIST_GET``
=================================== =====================================
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index cb51136328cf..62b885d44d06 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -58,6 +58,7 @@ enum {
ETHTOOL_MSG_MM_GET,
ETHTOOL_MSG_MM_SET,
ETHTOOL_MSG_TS_GET,
+ ETHTOOL_MSG_TS_LIST_GET,

/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -111,6 +112,7 @@ enum {
ETHTOOL_MSG_MM_GET_REPLY,
ETHTOOL_MSG_MM_NTF,
ETHTOOL_MSG_TS_GET_REPLY,
+ ETHTOOL_MSG_TS_LIST_GET_REPLY,

/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@@ -989,6 +991,18 @@ enum {
ETHTOOL_A_TS_MAX = (__ETHTOOL_A_TS_CNT - 1)
};

+/* TS LIST LAYER */
+
+enum {
+ ETHTOOL_A_TS_LIST_UNSPEC,
+ ETHTOOL_A_TS_LIST_HEADER, /* nest - _A_HEADER_* */
+ ETHTOOL_A_TS_LIST_LAYER, /* array, u32 */
+
+ /* add new constants above here */
+ __ETHTOOL_A_TS_LIST_CNT,
+ ETHTOOL_A_TS_LIST_MAX = (__ETHTOOL_A_TS_LIST_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 561c0931d055..842c9db1531f 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -307,6 +307,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_MM_GET] = &ethnl_mm_request_ops,
[ETHTOOL_MSG_MM_SET] = &ethnl_mm_request_ops,
[ETHTOOL_MSG_TS_GET] = &ethnl_ts_request_ops,
+ [ETHTOOL_MSG_TS_LIST_GET] = &ethnl_ts_list_request_ops,
};

static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -1138,6 +1139,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.policy = ethnl_ts_get_policy,
.maxattr = ARRAY_SIZE(ethnl_ts_get_policy) - 1,
},
+ {
+ .cmd = ETHTOOL_MSG_TS_LIST_GET,
+ .doit = ethnl_default_doit,
+ .start = ethnl_default_start,
+ .dumpit = ethnl_default_dumpit,
+ .done = ethnl_default_done,
+ .policy = ethnl_ts_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_ts_get_policy) - 1,
+ },
};

static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 1e6085198acc..ea8c312db3af 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -396,6 +396,7 @@ extern const struct ethnl_request_ops ethnl_plca_cfg_request_ops;
extern const struct ethnl_request_ops ethnl_plca_status_request_ops;
extern const struct ethnl_request_ops ethnl_mm_request_ops;
extern const struct ethnl_request_ops ethnl_ts_request_ops;
+extern const struct ethnl_request_ops ethnl_ts_list_request_ops;

extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1];
extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1];
diff --git a/net/ethtool/ts.c b/net/ethtool/ts.c
index 066cb06f4d0b..f2dd65a2e69c 100644
--- a/net/ethtool/ts.c
+++ b/net/ethtool/ts.c
@@ -86,3 +86,76 @@ const struct ethnl_request_ops ethnl_ts_request_ops = {
.reply_size = ts_reply_size,
.fill_reply = ts_fill_reply,
};
+
+/* TS_LIST_GET */
+struct ts_list_reply_data {
+ struct ethnl_reply_data base;
+ enum timestamping_layer ts_layer[__TIMESTAMPING_COUNT];
+ u8 num_ts;
+};
+
+#define TS_LIST_REPDATA(__reply_base) \
+ container_of(__reply_base, struct ts_list_reply_data, base)
+
+static int ts_list_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ const struct genl_info *info)
+{
+ struct ts_list_reply_data *data = TS_LIST_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+ int ret, i = 0;
+
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+
+ if (phy_has_tsinfo(dev->phydev))
+ data->ts_layer[i++] = PHY_TIMESTAMPING;
+ if (ops->get_ts_info) {
+ struct ethtool_ts_info ts_info = {0};
+
+ ops->get_ts_info(dev, &ts_info);
+ if (ts_info.so_timestamping &
+ SOF_TIMESTAMPING_HARDWARE_MASK)
+ data->ts_layer[i++] = MAC_TIMESTAMPING;
+
+ if (ts_info.so_timestamping &
+ SOF_TIMESTAMPING_SOFTWARE_MASK)
+ data->ts_layer[i++] = SOFTWARE_TIMESTAMPING;
+ }
+
+ data->num_ts = i;
+ ethnl_ops_complete(dev);
+
+ return ret;
+}
+
+static int ts_list_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ struct ts_list_reply_data *data = TS_LIST_REPDATA(reply_base);
+
+ return nla_total_size(sizeof(u32)) * data->num_ts;
+}
+
+static int ts_list_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ struct ts_list_reply_data *data = TS_LIST_REPDATA(reply_base);
+
+ return nla_put(skb, ETHTOOL_A_TS_LIST_LAYER, sizeof(u32) * data->num_ts, data->ts_layer);
+}
+
+const struct ethnl_request_ops ethnl_ts_list_request_ops = {
+ .request_cmd = ETHTOOL_MSG_TS_LIST_GET,
+ .reply_cmd = ETHTOOL_MSG_TS_LIST_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_TS_HEADER,
+ .req_info_size = sizeof(struct ts_req_info),
+ .reply_data_size = sizeof(struct ts_list_reply_data),
+
+ .prepare_data = ts_list_prepare_data,
+ .reply_size = ts_list_reply_size,
+ .fill_reply = ts_list_fill_reply,
+};

--
2.25.1

2023-10-19 14:31:40

by Kory Maincent

Subject: [PATCH net-next v6 11/16] netlink: specs: Introduce new netlink command to list available time stamping layers

Add a new commands allowing to list available time stamping layers on a
netdevice's link.

Example usage :
./ynl/cli.py --spec netlink/specs/ethtool.yaml --no-schema \
--do ts-list-get \
--json '{"header":{"dev-name":"eth0"}}'
{'header': {'dev-index': 3, 'dev-name': 'eth0'},
'ts-list-layer': b'\x01\x00\x00\x00\x05\x00\x00\x00'}

Signed-off-by: Kory Maincent <[email protected]>
---
Documentation/netlink/specs/ethtool.yaml | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml
index 49ee028e97ca..81ed8e5f2f55 100644
--- a/Documentation/netlink/specs/ethtool.yaml
+++ b/Documentation/netlink/specs/ethtool.yaml
@@ -952,6 +952,16 @@ attribute-sets:
-
name: ts-layer
type: u32
+ -
+ name: ts-list
+ attributes:
+ -
+ name: header
+ type: nest
+ nested-attributes: header
+ -
+ name: ts-list-layer
+ type: binary

operations:
enum-model: directional
@@ -1716,3 +1726,17 @@ operations:
attributes: &ts
- header
- ts-layer
+ -
+ name: ts-list-get
+ doc: Get list of timestamp devices available on an interface
+
+ attribute-set: ts-list
+
+ do:
+ request:
+ attributes:
+ - header
+ reply:
+ attributes:
+ - header
+ - ts-list-layer

--
2.25.1

2023-10-19 14:31:44

by Kory Maincent

Subject: [PATCH net-next v6 16/16] netlink: specs: Introduce time stamping set command

Add a new commands allowing to set the time stamping.

Example usage :
./ynl/cli.py --spec netlink/specs/ethtool.yaml --no-schema \
--do ts-list-get \
--json '{"header":{"dev-name":"eth0"}}'
{'header': {'dev-index': 3, 'dev-name': 'eth0'},
'ts-list-layer': b'\x02\x00\x00\x00\x01\x00\x00\x00\x05\x00\x00\x00'}

./ynl/cli.py --spec netlink/specs/ethtool.yaml --no-schema --do ts-set \
--json '{"header":{"dev-name":"eth0"}, "ts-layer":5}'
none

./ynl/cli.py --spec netlink/specs/ethtool.yaml --no-schema --do ts-get \
--json '{"header":{"dev-name":"eth0"}}'
{'header': {'dev-index': 3, 'dev-name': 'eth0'}, 'ts-layer': 5}

Signed-off-by: Kory Maincent <[email protected]>
---
Documentation/netlink/specs/ethtool.yaml | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml
index 81ed8e5f2f55..cfee4bf32128 100644
--- a/Documentation/netlink/specs/ethtool.yaml
+++ b/Documentation/netlink/specs/ethtool.yaml
@@ -1740,3 +1740,12 @@ operations:
attributes:
- header
- ts-list-layer
+ -
+ name: ts-set
+ doc: Set the timestamp device
+
+ attribute-set: ts
+
+ do:
+ request:
+ attributes: *ts

--
2.25.1

2023-10-19 14:48:55

by Willem de Bruijn

Subject: Re: [PATCH net-next v6 07/16] net_tstamp: Add TIMESTAMPING SOFTWARE and HARDWARE mask

On Thu, Oct 19, 2023 at 10:29 AM Kory Maincent
<[email protected]> wrote:
>
> Timestamping software or hardware flags are often used as a group,
> therefore adding these masks will easier future use.

This assumes that device support for timestamping is often symmetric:
a device supports both rx and tx, or neither.

All devices support software receive timestamping, as that timestamp
is taken in the core network stack. But to support transmit timestamps
drivers have to call sbk_tstamp_tx in their ndo_start_xmit.

For hardware timestamping it may be more common to support both or
neither, not sure.

> I did not use SOF_TIMESTAMPING_SYS_HARDWARE flag as it is deprecated and
> not use at all.
>
> Signed-off-by: Kory Maincent <[email protected]>
> ---
> include/uapi/linux/net_tstamp.h | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h
> index a2c66b3d7f0f..df8091998c8d 100644
> --- a/include/uapi/linux/net_tstamp.h
> +++ b/include/uapi/linux/net_tstamp.h
> @@ -48,6 +48,14 @@ enum {
> SOF_TIMESTAMPING_TX_SCHED | \
> SOF_TIMESTAMPING_TX_ACK)
>
> +#define SOF_TIMESTAMPING_SOFTWARE_MASK (SOF_TIMESTAMPING_RX_SOFTWARE | \
> + SOF_TIMESTAMPING_TX_SOFTWARE | \
> + SOF_TIMESTAMPING_SOFTWARE)
> +
> +#define SOF_TIMESTAMPING_HARDWARE_MASK (SOF_TIMESTAMPING_RX_HARDWARE | \
> + SOF_TIMESTAMPING_TX_HARDWARE | \
> + SOF_TIMESTAMPING_RAW_HARDWARE)
> +
> /**
> * struct so_timestamping - SO_TIMESTAMPING parameter
> *
>
> --
> 2.25.1
>

2023-10-19 18:53:47

by Florian Fainelli

Subject: Re: [PATCH net-next v6 05/16] net: Make dev_set_hwtstamp_phylib accessible

On 10/19/23 07:29, Kory Maincent wrote:
> Make the dev_set_hwtstamp_phylib function accessible in prevision to use
> it from ethtool to reset the tstamp current configuration.
>
> Signed-off-by: Kory Maincent <[email protected]>

Reviewed-by: Florian Fainelli <[email protected]>
--
Florian

Attachments:

2023-10-21 01:47:38

by Jakub Kicinski

Subject: Re: [PATCH net-next v6 12/16] net: Replace hwtstamp_source by timestamping layer

On Thu, 19 Oct 2023 16:29:27 +0200 Kory Maincent wrote:
> Replace hwtstamp_source which is only used by the kernel_hwtstamp_config
> structure by the more widely use timestamp_layer structure. This is done
> to prepare the support of selectable timestamping source.
>
> Signed-off-by: Kory Maincent <[email protected]>

Temporarily breaks the build :(

net/core/dev_ioctl.c:335:44: error: use of undeclared identifier 'NET_TIMESTAMPING'; did you mean 'NO_TIMESTAMPING'?
cfg->source = phy_ts ? PHY_TIMESTAMPING : NET_TIMESTAMPING;
^~~~~~~~~~~~~~~~
NO_TIMESTAMPING
include/uapi/linux/net_tstamp.h:18:2: note: 'NO_TIMESTAMPING' declared here
NO_TIMESTAMPING,
^
--
pw-bot: cr

2023-10-23 07:57:04

by Kory Maincent

Subject: Re: [PATCH net-next v6 12/16] net: Replace hwtstamp_source by timestamping layer

On Fri, 20 Oct 2023 18:47:14 -0700
Jakub Kicinski <[email protected]> wrote:

> On Thu, 19 Oct 2023 16:29:27 +0200 Kory Maincent wrote:
> > Replace hwtstamp_source which is only used by the kernel_hwtstamp_config
> > structure by the more widely use timestamp_layer structure. This is done
> > to prepare the support of selectable timestamping source.
> >
> > Signed-off-by: Kory Maincent <[email protected]>
>
> Temporarily breaks the build :(
>
> net/core/dev_ioctl.c:335:44: error: use of undeclared identifier
> 'NET_TIMESTAMPING'; did you mean 'NO_TIMESTAMPING'? cfg->source = phy_ts ?
> PHY_TIMESTAMPING : NET_TIMESTAMPING; ^~~~~~~~~~~~~~~~
> NO_TIMESTAMPING
> include/uapi/linux/net_tstamp.h:18:2: note: 'NO_TIMESTAMPING' declared here
> NO_TIMESTAMPING,
> ^

Doh, I forgot to run the in-between patch build procedures. Sorry about that.

Köry

2023-10-24 13:41:19

by Kory Maincent

Subject: Re: [PATCH net-next v6 07/16] net_tstamp: Add TIMESTAMPING SOFTWARE and HARDWARE mask

On Thu, 19 Oct 2023 10:48:04 -0400
Willem de Bruijn <[email protected]> wrote:

> On Thu, Oct 19, 2023 at 10:29 AM Kory Maincent
> <[email protected]> wrote:
> >
> > Timestamping software or hardware flags are often used as a group,
> > therefore adding these masks will easier future use.
>
> This assumes that device support for timestamping is often symmetric:
> a device supports both rx and tx, or neither.
>
> All devices support software receive timestamping, as that timestamp
> is taken in the core network stack. But to support transmit timestamps
> drivers have to call sbk_tstamp_tx in their ndo_start_xmit.

Yes, and in that software only case they often call ethtool_op_get_ts_info to
fill the timestamp info.

There is several drivers that support hardware and software timestamp, these
mask could be useful for these. In case of asymmetric support we can still use
the SOF_TIMESTAMPING_RX/TX_SOFTWARE flags.

I forgot to specify, in the commit message but this patch is mainly to ease
the next patch of this series to deal with software/hardware time stamping.
Maybe you prefer to have this squash into next patch as had suggested Florian
in last version.

Köry

2023-10-24 14:22:09

by Willem de Bruijn

Subject: Re: [PATCH net-next v6 07/16] net_tstamp: Add TIMESTAMPING SOFTWARE and HARDWARE mask

On Tue, Oct 24, 2023 at 9:40 AM Köry Maincent <[email protected]> wrote:
>
> On Thu, 19 Oct 2023 10:48:04 -0400
> Willem de Bruijn <[email protected]> wrote:
>
> > On Thu, Oct 19, 2023 at 10:29 AM Kory Maincent
> > <[email protected]> wrote:
> > >
> > > Timestamping software or hardware flags are often used as a group,
> > > therefore adding these masks will easier future use.
> >
> > This assumes that device support for timestamping is often symmetric:
> > a device supports both rx and tx, or neither.
> >
> > All devices support software receive timestamping, as that timestamp
> > is taken in the core network stack. But to support transmit timestamps
> > drivers have to call sbk_tstamp_tx in their ndo_start_xmit.
>
> Yes, and in that software only case they often call ethtool_op_get_ts_info to
> fill the timestamp info.
>
> There is several drivers that support hardware and software timestamp, these
> mask could be useful for these. In case of asymmetric support we can still use
> the SOF_TIMESTAMPING_RX/TX_SOFTWARE flags.
>
> I forgot to specify, in the commit message but this patch is mainly to ease
> the next patch of this series to deal with software/hardware time stamping.
> Maybe you prefer to have this squash into next patch as had suggested Florian
> in last version.

Thanks. I did not see such use in net/ or in my experience of using
setsockopt SO_TIMESTAMPING.

But I had not considered net device get_ts_info. It would be useful there.

Slight preference from me to keep this a separate patch, as it applies
not only to the use case in your follow-on patch.