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Date:   Mon, 3 Aug 2020 17:28:00 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Jacob Keller <jacob.e.keller@...el.com>
Cc:     netdev@...r.kernel.org, Jiri Pirko <jiri@...lanox.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Michael Chan <michael.chan@...adcom.com>,
        Bin Luo <luobin9@...wei.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Leon Romanovsky <leon@...nel.org>,
        Ido Schimmel <idosch@...lanox.com>,
        Danielle Ratson <danieller@...lanox.com>
Subject: Re: [net-next v2 0/5] devlink flash update overwrite mask

Sat, Aug 01, 2020 at 02:21:54AM CEST, jacob.e.keller@...el.com wrote:
>This series introduces support for a new attribute to the flash update
>command: DEVLINK_ATTR_FLASH_UPDATE_OVERWRITE_MASK. This attribute is a u32
>value that represents a bitmask of which subsections of flash to
>request/allow overwriting when performing a flash update.
>
>The intent is to support the ability to control overwriting options of the
>ice hardware flash update. Specifically, the ice flash components combine
>settings and identifiers within the firmware flash section. This series
>introduces the two subsections, "identifiers" and "settings". With the new
>attribute, users can request to overwrite these subsections when performing
>a flash update. By existing convention, it is assumed that flash program
>binaries are always updated (and thus overwritten), and no mask bit is
>provided to control this.
>
>First, the .flash_update command is modified to take a parameter structure.
>A new supported_flash_update_params field is also provided to allow drivers
>to opt-in to the parameters they support rather than opting out. This is
>similar to the recently added supported_coalesc_params field in ethtool.
>
>Following this, the new overwrite mask parameter is added, along with the
>associated supported bit. The netdevsim driver is updated to support this
>parameter, along with a few self tests to help verify the interface is
>working as expected.
>
>Finally, the ice driver is modified to support the parameter, converting it
>into the firmware preservation level request.
>
>Patches to enable support for specifying the overwrite sections are also
>provided for iproute2-next. This is done primarily in order to enable the
>tests for netdevsim. As discussed previously on the list, the primary
>motivations for the overwrite mode are two-fold.
>
>First, supporting update with a customized image that has pre-configured
>settings and identifiers, used with overwrite of both settings and
>identifiers. This enables an initial update to overwrite default values and
>customize the adapter with a new serial ID and fresh settings. Second, it
>may sometimes be useful to allow overwriting of settings when updating in
>order to guarantee that the settings in the flash section are "known good".


I'm missing examples in the cover letter. It is much easier to
understand the nature of the patchset with examples. Could you please
repost with them?

Thanks!



>
>Changes since v1
>* Added supported_flash_update_params field, removing some boilerplate in
>  each driver. This also makes it easier to add new parameters in the future
>  without fear of accidentally breaking an existing driver, due to opt-in
>  behavior instead of forcing drivers to opt-out.
>* Split the ice changes to a separate patch.
>
>Cc: Jiri Pirko <jiri@...lanox.com>
>Cc: Jakub Kicinski <kuba@...nel.org>
>Cc: Jonathan Corbet <corbet@....net>
>Cc: Michael Chan <michael.chan@...adcom.com>
>Cc: Bin Luo <luobin9@...wei.com>
>Cc: Saeed Mahameed <saeedm@...lanox.com>
>Cc: Leon Romanovsky <leon@...nel.org>
>Cc: Ido Schimmel <idosch@...lanox.com>
>Cc: Danielle Ratson <danieller@...lanox.com>
>
>Jacob Keller (3):
>  devlink: convert flash_update to use params structure
>  devlink: introduce flash update overwrite mask
>  ice: add support for flash update overwrite mask
>
> .../networking/devlink/devlink-flash.rst      | 29 ++++++++++++++
> Documentation/networking/devlink/ice.rst      | 31 +++++++++++++++
> .../net/ethernet/broadcom/bnxt/bnxt_devlink.c | 19 ++++-----
> .../net/ethernet/huawei/hinic/hinic_devlink.c |  8 +---
> drivers/net/ethernet/intel/ice/ice_devlink.c  | 33 +++++++++++-----
> .../net/ethernet/intel/ice/ice_fw_update.c    | 16 +++++++-
> .../net/ethernet/intel/ice/ice_fw_update.h    |  2 +-
> .../net/ethernet/mellanox/mlx5/core/devlink.c |  8 +---
> drivers/net/ethernet/mellanox/mlxsw/core.c    |  6 +--
> drivers/net/ethernet/mellanox/mlxsw/core.h    |  2 +-
> .../net/ethernet/mellanox/mlxsw/spectrum.c    |  7 +---
> .../net/ethernet/netronome/nfp/nfp_devlink.c  |  9 ++---
> drivers/net/netdevsim/dev.c                   | 21 +++++++---
> drivers/net/netdevsim/netdevsim.h             |  1 +
> include/net/devlink.h                         | 35 ++++++++++++++++-
> include/uapi/linux/devlink.h                  | 24 ++++++++++++
> net/core/devlink.c                            | 39 +++++++++++++++----
> .../drivers/net/netdevsim/devlink.sh          | 21 ++++++++++
> 18 files changed, 244 insertions(+), 67 deletions(-)
>
>Jacob Keller (2):
>  Update devlink header for overwrite mask attribute
>  devlink: support setting the overwrite mask
>
> devlink/devlink.c            | 37 ++++++++++++++++++++++++++++++++++--
> include/uapi/linux/devlink.h | 24 +++++++++++++++++++++++
> 2 files changed, 59 insertions(+), 2 deletions(-)
>
>base-commit: bd69058f50d5ffa659423bcfa6fe6280ce9c760a
>-- 
>2.28.0.163.g6104cc2f0b60
>

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