netdev - [PATCH net-next v4 RFC 0/8] devlink: Add configuration parameters support for devlink

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Message-Id: <1545190049-27212-1-git-send-email-vasundhara-v.volam@broadcom.com>
Date:   Wed, 19 Dec 2018 08:57:21 +0530
From:   Vasundhara Volam <vasundhara-v.volam@...adcom.com>
To:     davem@...emloft.net
Cc:     michael.chan@...adcom.com, jiri@...lanox.com,
        jakub.kicinski@...ronome.com, mkubecek@...e.cz,
        netdev@...r.kernel.org
Subject: [PATCH net-next v4 RFC 0/8] devlink: Add configuration parameters support for devlink_port

This patchset adds support for configuration parameters setting through
devlink_port.  Each device registers supported configuration parameters
table.

The user can retrieve data on these parameters by
"devlink port param show" command and can set new value to a
parameter by "devlink port param set" command.
All configuration modes supported by devlink_dev are supported
by devlink_port also.

Command examples and output:

# devlink port param show
pci/0000:3b:00.0/0:
  name wake-on-lan type generic
    values:
      cmode permanent value false

pci/0000:3b:00.1/1:
  name wake-on-lan type generic
    values:
      cmode permanent value false

pci/0000:af:00.0/0:
  name wake-on-lan type generic
    values:
      cmode permanent value true

# devlink port param show pci/0000:3b:00.0/0 name wake-on-lan
pci/0000:3b:00.0/0:
  name wake-on-lan type generic
    values:
      cmode permanent value false

# devlink port param set pci/0000:3b:00.0/0 name wake-on-lan cmode permanent value true

v3->v4:
- Update changes done from v2 to v3 version in individual patch
  descriptions.

v2->v3:
Make following changes as per suggestions from Jiri Pirko and
Michal Kubecek.
- Add a helper __devlink_params_register() with common code used by
  both devlink_params_register() and devlink_port_params_register().
- Define only WOL types used now and define them as bitfield, so that
  mutliple WOL types can be enabled upon power on.
- Modify "wake-on-lan" name to "wake_on_lan" to be symmetric with
  previous definitions.
- Rename DEVLINK_PARAM_WOL_XXX to DEVLINK_PARAM_WAKE_XXX to be
  symmetrical with ethtool WOL definitions.
- Modify bnxt_dl_wol_validate(), to throw error message when user gives
  value other than DEVLINK_PARAM_WAKE_MAGIC or to disable WOL.
- Use netdev_err() instead of netdev_warn(), when devlink_port_register()
  and devlink_port_params_register() returns error. Also, don't log rc
  in this message.

v1->v2:
Make following changes as per suggestions from Jiri Pirko.
- Remove separate enum devlink_port_param_generic_id for port params.
  Instead club it with existing device params. Accordingly refactor
  remaining patchset.
- Move INIT_LIST_HEAD of port param_list to devlink_port_register()
- Add a helper devlink_param_verify() to be used for both
  devlink_params_register() and devlink_port_params_register().
- Add a helper __devlink_params_unregister() for common code in
  devlink_params_unregister() and devlink_port_params_unregister().
- Move DEVLINK_CMD_PORT_PARAM_XXX definitions to the end of the enum.
- Split the patches for devlink_port_param_driverinit_value_get() and
  devlink_port_param_driverinit_value_set() into separate patches.
- define DEVLINK_PARAM_GENERIC_ID_WOL type as u8 and define enum for
  different types of WOL. Accordingly modify bnxt_en patch to validate
  wol type.

Vasundhara Volam (8):
  devlink: Add devlink_param for port register and unregister
  devlink: Add port param get command
  devlink: Add port param set command
  devlink: Add support for driverinit get value for devlink_port
  devlink: Add support for driverinit set value for devlink_port
  devlink: Add devlink notifications support for port params
  devlink: Add a generic wake_on_lan port parameter
  bnxt_en: Add bnxt_en initial port params table and register it

 drivers/net/ethernet/broadcom/bnxt/bnxt.h         |   1 +
 drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c |  43 +-
 drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h |   1 +
 include/net/devlink.h                             |  57 +++
 include/uapi/linux/devlink.h                      |   5 +
 net/core/devlink.c                                | 464 ++++++++++++++++++----
 6 files changed, 489 insertions(+), 82 deletions(-)

-- 
1.8.3.1