[PATCH RFC net-next v8 00/13] net: Make timestamping selectable

[Kory Maincent <kory.maincent@bootlin.com>]

Up until now, there was no way to let the user select the hardware
PTP provider 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 hwtstamp provider administratively.

Changes in v8:
- Drop the 6 first patch as they are now merged.
- Change the full implementation to not be based on the hwtstamp layer
  (MAC/PHY) but on the hwtstamp provider which mean a ptp clock and a
  phc qualifier.
- Made some patch to prepare the new implementation.
- Expand netlink tsinfo instead of a new ts command for new hwtstamp
  configuration uAPI and for dumping tsinfo of specific hwtstamp provider.
- Link to v7: https://lore.kernel.org/r/20231114-feature_ptp_netnext-v7-0-472e77951e40@bootlin.com

Changes in v7:
- Fix a temporary build error.
- Link to v6: https://lore.kernel.org/r/20231019-feature_ptp_netnext-v6-0-71affc27b0e5@bootlin.com

Changes 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.

Changes 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.

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.

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

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
---
Kory Maincent (13):
      net_tstamp: Add TIMESTAMPING SOFTWARE and HARDWARE mask
      net: Make dev_get_hwtstamp_phylib accessible
      net: Make net_hwtstamp_validate accessible
      net: Change the API of PHY default timestamp to MAC
      net: net_tstamp: Add unspec field to hwtstamp_source enumeration
      net: Add struct kernel_ethtool_ts_info
      ptp: Move from simple ida to xarray
      ptp: Add phc source and helpers to register specific PTP clock or get information
      net: Add the possibility to support a selected hwtstamp in netdevice
      net: netdevsim: ptp_mock: Convert to netdev_ptp_clock_register
      net: macb: Convert to netdev_ptp_clock_register
      net: ethtool: tsinfo: Add support for hwtstamp provider and get/set hwtstamp config
      netlink: specs: tsinfo: Enhance netlink attributes and add a set command

 Documentation/netlink/specs/ethtool.yaml           |  35 +-
 drivers/net/bonding/bond_main.c                    |   4 +-
 drivers/net/can/dev/dev.c                          |   2 +-
 drivers/net/can/peak_canfd/peak_canfd.c            |   2 +-
 drivers/net/can/usb/gs_usb.c                       |   2 +-
 drivers/net/can/usb/peak_usb/pcan_usb_core.c       |   2 +-
 drivers/net/can/usb/peak_usb/pcan_usb_core.h       |   2 +-
 drivers/net/dsa/hirschmann/hellcreek_hwtstamp.c    |   2 +-
 drivers/net/dsa/hirschmann/hellcreek_hwtstamp.h    |   2 +-
 drivers/net/dsa/microchip/ksz_ptp.c                |   2 +-
 drivers/net/dsa/microchip/ksz_ptp.h                |   2 +-
 drivers/net/dsa/mv88e6xxx/hwtstamp.c               |   2 +-
 drivers/net/dsa/mv88e6xxx/hwtstamp.h               |   4 +-
 drivers/net/dsa/ocelot/felix.c                     |   2 +-
 drivers/net/dsa/sja1105/sja1105_ptp.c              |   2 +-
 drivers/net/dsa/sja1105/sja1105_ptp.h              |   2 +-
 drivers/net/ethernet/amd/xgbe/xgbe-ethtool.c       |   2 +-
 .../net/ethernet/aquantia/atlantic/aq_ethtool.c    |   2 +-
 .../net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c    |   2 +-
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c  |   2 +-
 drivers/net/ethernet/broadcom/tg3.c                |   2 +-
 drivers/net/ethernet/cadence/macb.h                |   2 +-
 drivers/net/ethernet/cadence/macb_main.c           |   4 +-
 drivers/net/ethernet/cadence/macb_ptp.c            |   2 +-
 drivers/net/ethernet/cavium/liquidio/lio_ethtool.c |   2 +-
 .../net/ethernet/cavium/thunder/nicvf_ethtool.c    |   2 +-
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_ethtool.c |   2 +-
 drivers/net/ethernet/cisco/enic/enic_ethtool.c     |   2 +-
 drivers/net/ethernet/engleder/tsnep_ethtool.c      |   2 +-
 drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c |   2 +-
 .../net/ethernet/freescale/dpaa2/dpaa2-ethtool.c   |   2 +-
 .../net/ethernet/freescale/enetc/enetc_ethtool.c   |   2 +-
 drivers/net/ethernet/freescale/fec_main.c          |   2 +-
 drivers/net/ethernet/freescale/gianfar_ethtool.c   |   2 +-
 .../net/ethernet/fungible/funeth/funeth_ethtool.c  |   2 +-
 drivers/net/ethernet/hisilicon/hns3/hnae3.h        |   2 +-
 drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c |   2 +-
 .../net/ethernet/hisilicon/hns3/hns3pf/hclge_ptp.c |   2 +-
 .../net/ethernet/hisilicon/hns3/hns3pf/hclge_ptp.h |   2 +-
 drivers/net/ethernet/intel/e1000e/ethtool.c        |   2 +-
 drivers/net/ethernet/intel/i40e/i40e_ethtool.c     |   2 +-
 drivers/net/ethernet/intel/ice/ice_ethtool.c       |   2 +-
 drivers/net/ethernet/intel/igb/igb_ethtool.c       |   2 +-
 drivers/net/ethernet/intel/igc/igc_ethtool.c       |   2 +-
 drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c   |   2 +-
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c    |   2 +-
 .../ethernet/marvell/octeontx2/nic/otx2_ethtool.c  |   2 +-
 drivers/net/ethernet/mellanox/mlx4/en_ethtool.c    |   2 +-
 drivers/net/ethernet/mellanox/mlx5/core/en.h       |   2 +-
 .../net/ethernet/mellanox/mlx5/core/en_ethtool.c   |   4 +-
 .../ethernet/mellanox/mlx5/core/ipoib/ethtool.c    |   2 +-
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h     |   2 +-
 .../net/ethernet/mellanox/mlxsw/spectrum_ethtool.c |   2 +-
 drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c |   4 +-
 drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.h |  10 +-
 drivers/net/ethernet/microchip/lan743x_ethtool.c   |   2 +-
 .../ethernet/microchip/lan966x/lan966x_ethtool.c   |   2 +-
 .../net/ethernet/microchip/sparx5/sparx5_ethtool.c |   2 +-
 drivers/net/ethernet/mscc/ocelot_net.c             |   2 +-
 drivers/net/ethernet/mscc/ocelot_ptp.c             |   2 +-
 .../net/ethernet/pensando/ionic/ionic_ethtool.c    |   2 +-
 drivers/net/ethernet/qlogic/qede/qede_ethtool.c    |   2 +-
 drivers/net/ethernet/qlogic/qede/qede_ptp.c        |   2 +-
 drivers/net/ethernet/qlogic/qede/qede_ptp.h        |   2 +-
 drivers/net/ethernet/renesas/ravb_main.c           |   2 +-
 drivers/net/ethernet/renesas/rswitch.c             |   2 +-
 drivers/net/ethernet/sfc/ethtool.c                 |   2 +-
 drivers/net/ethernet/sfc/falcon/nic.h              |   2 +-
 drivers/net/ethernet/sfc/ptp.c                     |   2 +-
 drivers/net/ethernet/sfc/ptp.h                     |   5 +-
 drivers/net/ethernet/sfc/siena/ethtool.c           |   2 +-
 drivers/net/ethernet/sfc/siena/ptp.c               |   2 +-
 drivers/net/ethernet/sfc/siena/ptp.h               |   4 +-
 .../net/ethernet/stmicro/stmmac/stmmac_ethtool.c   |   2 +-
 drivers/net/ethernet/ti/am65-cpsw-ethtool.c        |   2 +-
 drivers/net/ethernet/ti/cpsw_ethtool.c             |   4 +-
 drivers/net/ethernet/ti/cpsw_priv.h                |   2 +-
 drivers/net/ethernet/ti/icssg/icssg_ethtool.c      |   2 +-
 drivers/net/ethernet/ti/netcp_ethss.c              |   4 +-
 drivers/net/ethernet/xscale/ixp4xx_eth.c           |   2 +-
 drivers/net/macvlan.c                              |   2 +-
 drivers/net/netdevsim/ethtool.c                    |   2 +-
 drivers/net/netdevsim/netdev.c                     |  19 +-
 drivers/net/phy/bcm-phy-ptp.c                      |   5 +-
 drivers/net/phy/dp83640.c                          |   5 +-
 drivers/net/phy/marvell_ptp.c                      |   2 +-
 drivers/net/phy/micrel.c                           |  10 +-
 drivers/net/phy/mscc/mscc_ptp.c                    |   5 +-
 drivers/net/phy/nxp-c45-tja11xx.c                  |   5 +-
 drivers/net/phy/phy_device.c                       |   7 +
 drivers/ptp/ptp_clock.c                            | 131 ++++-
 drivers/ptp/ptp_ines.c                             |   2 +-
 drivers/ptp/ptp_mock.c                             |   4 +-
 drivers/ptp/ptp_private.h                          |   5 +
 drivers/s390/net/qeth_ethtool.c                    |   2 +-
 include/linux/can/dev.h                            |   2 +-
 include/linux/ethtool.h                            |  29 +-
 include/linux/mii_timestamper.h                    |   2 +-
 include/linux/net_tstamp.h                         |  15 +
 include/linux/netdevice.h                          |  10 +
 include/linux/phy.h                                |  19 +-
 include/linux/ptp_clock_kernel.h                   | 116 ++++
 include/linux/ptp_mock.h                           |   4 +-
 include/net/dsa.h                                  |   2 +-
 include/soc/mscc/ocelot.h                          |   2 +-
 include/uapi/linux/ethtool_netlink.h               |  12 +
 include/uapi/linux/net_tstamp.h                    |  14 +-
 net/8021q/vlan_dev.c                               |   2 +-
 net/core/dev.c                                     |  23 +
 net/core/dev_ioctl.c                               |  53 +-
 net/core/timestamping.c                            |  36 +-
 net/dsa/user.c                                     |   2 +-
 net/ethtool/common.c                               |  39 +-
 net/ethtool/common.h                               |   5 +-
 net/ethtool/ioctl.c                                |  12 +-
 net/ethtool/netlink.c                              |  14 +-
 net/ethtool/netlink.h                              |   6 +-
 net/ethtool/tsinfo.c                               | 604 ++++++++++++++++++++-
 net/sched/sch_taprio.c                             |   2 +-
 119 files changed, 1273 insertions(+), 178 deletions(-)
---
base-commit: 0ba49a95d5121aa5d92b0ae04e7b83dbee740b8c
change-id: 20231011-feature_ptp_netnext-3f278578e84b

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