[PATCH v3 net-next 0/6] bnxt_en: Add 'enable_live_dev_reset' and 'allow_live_dev_reset' generic devlink params.

From: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org, michael.chan@broadcom.com,
	Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Subject: [PATCH v3 net-next 0/6] bnxt_en: Add 'enable_live_dev_reset' and 'allow_live_dev_reset' generic devlink params.
Date: Sun, 31 May 2020 12:33:39 +0530	[thread overview]
Message-ID: <1590908625-10952-1-git-send-email-vasundhara-v.volam@broadcom.com> (raw)

Live device reset capability allows the users to reset the device in real
time. For example, after flashing a new firmware image, this feature allows
a user to initiate the reset immediately from a separate command, to load
the new firmware without reloading the driver or resetting the system.

When device reset is initiated, services running on the host interfaces
will momentarily pause and resume once reset is completed, which is very
similar to momentary network outage.

This patchset adds support for two new generic devlink parameters for
controlling the live device reset capability and use it in the bnxt_en
driver.

Users can initiate the reset from a separate command, for example,
'ethtool --reset ethX all' or 'devlink dev reload' to reset the
device.
Where ethX or dev is any PF with administrative privileges.

Patchset also updates firmware spec. to 1.10.1.40.

v2->v3: Split the param into two new params "enable_live_dev_reset" and
"allow_live_dev_reset".
- Expand the documentation of each param and update commit messages
 accordingly.
- Separated the permanent configuration mode code to another patch and
rename the callbacks of the "allow_live_dev_reset" parameter accordingly.

v1->v2: Rename param to "allow_fw_live_reset" from "enable_hot_fw_reset".
- Update documentation files and commit messages with more details of the
 feature.

Vasundhara Volam (6):
  devlink: Add 'enable_live_dev_reset' generic parameter.
  devlink: Add 'allow_live_dev_reset' generic parameter.
  bnxt_en: Use 'enable_live_dev_reset' devlink parameter.
  bnxt_en: Update firmware spec. to 1.10.1.40.
  bnxt_en: Use 'allow_live_dev_reset' devlink parameter.
  bnxt_en: Check if fw_live_reset is allowed before doing ETHTOOL_RESET

 Documentation/networking/devlink/bnxt.rst          |  4 ++
 .../networking/devlink/devlink-params.rst          | 28 ++++++++++
 drivers/net/ethernet/broadcom/bnxt/bnxt.c          | 28 +++++++++-
 drivers/net/ethernet/broadcom/bnxt/bnxt.h          |  2 +
 drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c  | 49 +++++++++++++++++
 drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.h  |  1 +
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c  | 17 +++---
 drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h      | 64 +++++++++++++---------
 include/net/devlink.h                              |  8 +++
 net/core/devlink.c                                 | 10 ++++
 10 files changed, 175 insertions(+), 36 deletions(-)

-- 
1.8.3.1