netdev - [PATCH V7 net-next 00/11] Peer to Peer One-Step time stamping

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Date:   Fri, 20 Dec 2019 10:15:09 -0800
From:   Richard Cochran <richardcochran@...il.com>
To:     netdev@...r.kernel.org
Cc:     David Miller <davem@...emloft.net>, devicetree@...r.kernel.org,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Mark Rutland <mark.rutland@....com>,
        Miroslav Lichvar <mlichvar@...hat.com>,
        Murali Karicheri <m-karicheri2@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Willem de Bruijn <willemb@...gle.com>,
        Wingman Kwok <w-kwok2@...com>
Subject: [PATCH V7 net-next 00/11] Peer to Peer One-Step time stamping

This series adds support for PTP (IEEE 1588) P2P one-step time
stamping along with a driver for a hardware device that supports this.

If the hardware supports p2p one-step, it subtracts the ingress time
stamp value from the Pdelay_Request correction field.  The user space
software stack then simply copies the correction field into the
Pdelay_Response, and on transmission the hardware adds the egress time
stamp into the correction field.

This new functionality extends CONFIG_NETWORK_PHY_TIMESTAMPING to
cover MII snooping devices, but it still depends on phylib, just as
that option does.  Expanding beyond phylib is not within the scope of
the this series.

User space support is available in the current linuxptp master branch.

- Patch 1 adds phy_device methods for existing time stamping fields.
- Patches 2-5 convert the stack and drivers to the new methods.
- Patches 6-9 add support for MII time stamping in non-PHY devices.
- Patch 10 adds the new P2P 1-step option.
- Patch 11 adds a driver implementing the new option.

Thanks,
Richard

Changed in v7:
~~~~~~~~~~~~~~

- Converted pr_debug|err to dev_ variants in new driver.
- Fixed device tree documentation per Rob's v6 review.
- Picked up Andrew's and Rob's review tags.
- Silenced sparse warnings in new driver.

Changed in v6:
~~~~~~~~~~~~~~

- Added methods for accessing the phy_device time stamping fields.
- Adjust the device tree documentation per Rob's v5 review.
- Fixed the build failures due to missing exports.

Changed in v5:
~~~~~~~~~~~~~~

- Fixed build failure in macvlan.
- Fixed latent bug with its gcc warning in the driver.

Changed in v4:
~~~~~~~~~~~~~~

- Correct error paths and PTR_ERR return values in the framework.
- Expanded KernelDoc comments WRT PHY locking.
- Pick up Andrew's review tag.

Changed in v3:
~~~~~~~~~~~~~~

- Simplify the device tree binding and document the time stamping
  phandle by itself.

Changed in v2:
~~~~~~~~~~~~~~

- Per the v1 review, changed the modeling of MII time stamping
  devices.  They are no longer a kind of mdio device.

Richard Cochran (11):
  net: phy: Introduce helper functions for time stamping support.
  net: macvlan: Use the PHY time stamping interface.
  net: vlan: Use the PHY time stamping interface.
  net: ethtool: Use the PHY time stamping interface.
  net: netcp_ethss: Use the PHY time stamping interface.
  net: Introduce a new MII time stamping interface.
  net: Add a layer for non-PHY MII time stamping drivers.
  dt-bindings: ptp: Introduce MII time stamping devices.
  net: mdio: of: Register discovered MII time stampers.
  net: Introduce peer to peer one step PTP time stamping.
  ptp: Add a driver for InES time stamping IP core.

 .../devicetree/bindings/ptp/ptp-ines.txt      |  35 +
 .../devicetree/bindings/ptp/timestamper.txt   |  42 +
 .../net/ethernet/broadcom/bnx2x/bnx2x_main.c  |   1 +
 drivers/net/ethernet/ti/netcp_ethss.c         |   8 +-
 drivers/net/macvlan.c                         |   4 +-
 drivers/net/phy/Makefile                      |   2 +
 drivers/net/phy/dp83640.c                     |  47 +-
 drivers/net/phy/mii_timestamper.c             | 125 +++
 drivers/net/phy/phy.c                         |   4 +-
 drivers/net/phy/phy_device.c                  |   5 +
 drivers/of/of_mdio.c                          |  30 +-
 drivers/ptp/Kconfig                           |  10 +
 drivers/ptp/Makefile                          |   1 +
 drivers/ptp/ptp_ines.c                        | 852 ++++++++++++++++++
 include/linux/mii_timestamper.h               | 121 +++
 include/linux/phy.h                           |  85 +-
 include/uapi/linux/net_tstamp.h               |   8 +
 net/8021q/vlan_dev.c                          |   4 +-
 net/Kconfig                                   |   7 +-
 net/core/dev_ioctl.c                          |   1 +
 net/core/timestamping.c                       |  20 +-
 net/ethtool/ioctl.c                           |   4 +-
 22 files changed, 1351 insertions(+), 65 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/ptp/ptp-ines.txt
 create mode 100644 Documentation/devicetree/bindings/ptp/timestamper.txt
 create mode 100644 drivers/net/phy/mii_timestamper.c
 create mode 100644 drivers/ptp/ptp_ines.c
 create mode 100644 include/linux/mii_timestamper.h

-- 
2.20.1