Re: [RFC PATCH v7 0/8] Create common DPLL configuration API

[Jiri Pirko <jiri@resnulli.us>]

Fri, Apr 28, 2023 at 02:20:01AM CEST, vadfed@meta.com wrote:
>From: Vadim Fedorenko <vadim.fedorenko@linux.dev>
>
>Implement common API for clock/DPLL configuration and status reporting.
>The API utilises netlink interface as transport for commands and event
>notifications. This API aim to extend current pin configuration and
>make it flexible and easy to cover special configurations.

Vadim, I guess you forgot, could you please add some example commands
here? Please keep them in for the next V.

Thanks!


>
>v6 -> v7:
> * YAML spec:
>   - remove nested 'pin' attribute
>   - clean up definitions on top of the latest changes
> * pin object:
>   - pin xarray uses id provided by the driver
>   - remove usage of PIN_IDX_INVALID in set function
>   - source_pin_get() returns object instead of idx
>   - fixes in frequency support API
> * device and pin operations are const now
> * small fixes in naming in Makefile and in the functions
> * single mutex for the subsystem to avoid possible ABBA locks
> * no special *_priv() helpers anymore, private data is passed as void*
> * no netlink filters by name anymore, only index is supported
> * update ptp_ocp and ice drivers to follow new API version
> * add mlx5e driver as a new customer of the subsystem
>v5 -> v6:
> * rework pin part to better fit shared pins use cases
> * add YAML spec to easy generate user-space apps
> * simple implementation in ptp_ocp is back again
>v4 -> v5:
> * fix code issues found during last reviews:
>   - replace cookie with clock id
>   - follow one naming schema in dpll subsys
>   - move function comments to dpll_core.c, fix exports
>   - remove single-use helper functions
>   - merge device register with alloc
>   - lock and unlock mutex on dpll device release
>   - move dpll_type to uapi header
>   - rename DPLLA_DUMP_FILTER to DPLLA_FILTER
>   - rename dpll_pin_state to dpll_pin_mode
>   - rename DPLL_MODE_FORCED to DPLL_MODE_MANUAL
>   - remove DPLL_CHANGE_PIN_TYPE enum value
> * rewrite framework once again (Arkadiusz)
>   - add clock class:
>     Provide userspace with clock class value of DPLL with dpll device dump
>     netlink request. Clock class is assigned by driver allocating a dpll
>     device. Clock class values are defined as specified in:
>     ITU-T G.8273.2/Y.1368.2 recommendation.
>   - dpll device naming schema use new pattern:
>     "dpll_%s_%d_%d", where:
>       - %s - dev_name(parent) of parent device,
>       - %d (1) - enum value of dpll type,
>       - %d (2) - device index provided by parent device.
>   - new muxed/shared pin registration:
>     Let the kernel module to register a shared or muxed pin without finding
>     it or its parent. Instead use a parent/shared pin description to find
>     correct pin internally in dpll_core, simplifing a dpll API
> * Implement complex DPLL design in ice driver (Arkadiusz)
> * Remove ptp_ocp driver from the series for now
>v3 -> v4:
> * redesign framework to make pins dynamically allocated (Arkadiusz)
> * implement shared pins (Arkadiusz)
>v2 -> v3:
> * implement source select mode (Arkadiusz)
> * add documentation
> * implementation improvements (Jakub)
>v1 -> v2:
> * implement returning supported input/output types
> * ptp_ocp: follow suggestions from Jonathan
> * add linux-clk mailing list
>v0 -> v1:
> * fix code style and errors
> * add linux-arm mailing list
>
>Arkadiusz Kubalewski (3):
>  dpll: spec: Add Netlink spec in YAML
>  ice: add admin commands to access cgu configuration
>  ice: implement dpll interface to control cgu
>
>Jiri Pirko (2):
>  netdev: expose DPLL pin handle for netdevice
>  mlx5: Implement SyncE support using DPLL infrastructure
>
>Vadim Fedorenko (3):
>  dpll: Add DPLL framework base functions
>  dpll: documentation on DPLL subsystem interface
>  ptp_ocp: implement DPLL ops
>
> Documentation/dpll.rst                        |  408 ++++
> Documentation/netlink/specs/dpll.yaml         |  472 ++++
> Documentation/networking/index.rst            |    1 +
> MAINTAINERS                                   |    8 +
> drivers/Kconfig                               |    2 +
> drivers/Makefile                              |    1 +
> drivers/dpll/Kconfig                          |    7 +
> drivers/dpll/Makefile                         |   10 +
> drivers/dpll/dpll_core.c                      |  939 ++++++++
> drivers/dpll/dpll_core.h                      |  113 +
> drivers/dpll/dpll_netlink.c                   |  991 +++++++++
> drivers/dpll/dpll_netlink.h                   |   27 +
> drivers/dpll/dpll_nl.c                        |  126 ++
> drivers/dpll/dpll_nl.h                        |   42 +
> drivers/net/ethernet/intel/Kconfig            |    1 +
> drivers/net/ethernet/intel/ice/Makefile       |    3 +-
> drivers/net/ethernet/intel/ice/ice.h          |    5 +
> .../net/ethernet/intel/ice/ice_adminq_cmd.h   |  240 +-
> drivers/net/ethernet/intel/ice/ice_common.c   |  467 ++++
> drivers/net/ethernet/intel/ice/ice_common.h   |   43 +
> drivers/net/ethernet/intel/ice/ice_dpll.c     | 1929 +++++++++++++++++
> drivers/net/ethernet/intel/ice/ice_dpll.h     |  101 +
> drivers/net/ethernet/intel/ice/ice_lib.c      |   17 +-
> drivers/net/ethernet/intel/ice/ice_main.c     |    7 +
> drivers/net/ethernet/intel/ice/ice_ptp_hw.c   |  414 ++++
> drivers/net/ethernet/intel/ice/ice_ptp_hw.h   |  230 ++
> drivers/net/ethernet/intel/ice/ice_type.h     |    1 +
> .../net/ethernet/mellanox/mlx5/core/Kconfig   |    8 +
> .../net/ethernet/mellanox/mlx5/core/Makefile  |    3 +
> drivers/net/ethernet/mellanox/mlx5/core/dev.c |   17 +
> .../net/ethernet/mellanox/mlx5/core/dpll.c    |  438 ++++
> drivers/ptp/Kconfig                           |    1 +
> drivers/ptp/ptp_ocp.c                         |  327 ++-
> include/linux/dpll.h                          |  294 +++
> include/linux/mlx5/driver.h                   |    2 +
> include/linux/mlx5/mlx5_ifc.h                 |   59 +-
> include/linux/netdevice.h                     |    7 +
> include/uapi/linux/dpll.h                     |  204 ++
> include/uapi/linux/if_link.h                  |    2 +
> net/core/dev.c                                |   20 +
> net/core/rtnetlink.c                          |   38 +
> 41 files changed, 7966 insertions(+), 59 deletions(-)
> create mode 100644 Documentation/dpll.rst
> create mode 100644 Documentation/netlink/specs/dpll.yaml
> create mode 100644 drivers/dpll/Kconfig
> create mode 100644 drivers/dpll/Makefile
> create mode 100644 drivers/dpll/dpll_core.c
> create mode 100644 drivers/dpll/dpll_core.h
> create mode 100644 drivers/dpll/dpll_netlink.c
> create mode 100644 drivers/dpll/dpll_netlink.h
> create mode 100644 drivers/dpll/dpll_nl.c
> create mode 100644 drivers/dpll/dpll_nl.h
> create mode 100644 drivers/net/ethernet/intel/ice/ice_dpll.c
> create mode 100644 drivers/net/ethernet/intel/ice/ice_dpll.h
> create mode 100644 drivers/net/ethernet/mellanox/mlx5/core/dpll.c
> create mode 100644 include/linux/dpll.h
> create mode 100644 include/uapi/linux/dpll.h
>
>-- 
>2.34.1
>