netdev - [PATCH net-next v2 0/3] mlxsw: Add 'fw_load

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Date:   Mon, 3 Dec 2018 07:58:57 +0000
From:   Ido Schimmel <idosch@...lanox.com>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        Jiri Pirko <jiri@...lanox.com>,
        Shalom Toledo <shalomt@...lanox.com>,
        "jakub.kicinski@...ronome.com" <jakub.kicinski@...ronome.com>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "dsahern@...il.com" <dsahern@...il.com>,
        "andy@...yhouse.net" <andy@...yhouse.net>,
        Alexander Petrovskiy <alexpe@...lanox.com>,
        mlxsw <mlxsw@...lanox.com>, Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next v2 0/3] mlxsw: Add 'fw_load_policy' devlink parameter

Shalom says:

Currently, drivers do not have the ability to control the firmware
loading policy and they always use their own fixed policy. This prevents
drivers from running the device with a different firmware version for
testing and/or debugging purposes. For example, testing a firmware bug
fix.

For these situations, the new devlink generic parameter,
'fw_load_policy', gives the ability to control this option and allows
drivers to run with a different firmware version than required by the
driver.

Patch #1 adds the new parameter to devlink. The other two patches, #2
and #3, add support for this parameter in the mlxsw driver.

Example:
  # Query the devlink parameters supported by the device
    $ devlink dev param show
    pci/0000:03:00.0:
      name fw_load_policy type generic
        values:
          cmode driverinit value driver

  # Flash new firmware using ethtool
    $ ethtool -f swp1 mellanox/mlxsw_spectrum-13.1703.4.mfa2

  # Toggle parameter
    $ devlink dev param set pci/0000:03:00.0 name fw_load_policy value flash cmode driverinit

  # devlink reset
    $ devlink dev reload pci/0000:03:00.0

  # Query firmware version to show changes took affect
    $ ethtool -i swp1
    driver: mlxsw_spectrum
    version: 1.0
    firmware-version: 13.1703.4
    expansion-rom-version:
    bus-info: 0000:03:00.0
    supports-statistics: yes
    supports-test: no
    supports-eeprom-access: no
    supports-register-dump: no
    supports-priv-flags: no

iproute2 patches available here:
https://github.com/tshalom/iproute2-next

v2:
* Change 'fw_version_check' to 'fw_load_policy' with values 'driver' and
  'flash' (Jakub)

Shalom Toledo (3):
  devlink: Add 'fw_load_policy' generic parameter
  mlxsw: core: Reset firmware after flash during driver initialization
  mlxsw: spectrum: Load firmware version based on devlink parameter

 Documentation/networking/devlink-params.txt   |  9 +++
 drivers/net/ethernet/mellanox/mlxsw/core.c    | 45 ++++++++++++--
 drivers/net/ethernet/mellanox/mlxsw/core.h    |  2 +
 drivers/net/ethernet/mellanox/mlxsw/pci.c     | 11 +---
 .../net/ethernet/mellanox/mlxsw/spectrum.c    | 60 +++++++++++++++++++
 include/net/devlink.h                         |  4 ++
 include/uapi/linux/devlink.h                  |  5 ++
 net/core/devlink.c                            |  5 ++
 8 files changed, 127 insertions(+), 14 deletions(-)

-- 
2.19.1