netdev - [patch net-next RFC v2 00/11] Add support for resource abstraction

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Message-Id: <20171114161852.6633-1-jiri@resnulli.us>
Date:   Tue, 14 Nov 2017 17:18:41 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, mlxsw@...lanox.com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        michael.chan@...adcom.com, ganeshgr@...lsio.com,
        saeedm@...lanox.com, matanb@...lanox.com, leonro@...lanox.com,
        idosch@...lanox.com, jakub.kicinski@...ronome.com, ast@...nel.org,
        daniel@...earbox.net, simon.horman@...ronome.com,
        pieter.jansenvanvuuren@...ronome.com, john.hurley@...ronome.com,
        alexander.h.duyck@...el.com, linville@...driver.com,
        gospo@...adcom.com, steven.lin1@...adcom.com, yuvalm@...lanox.com,
        ogerlitz@...lanox.com, dsa@...ulusnetworks.com,
        roopa@...ulusnetworks.com
Subject: [patch net-next RFC v2 00/11] Add support for resource abstraction

From: Jiri Pirko <jiri@...lanox.com>

Arkadi says:

Many of the ASIC's internal resources are limited and are shared between
several hardware procedures. For example, unified hash-based memory can
be used for many lookup purposes, like FDB and LPM. In many cases the user
can provide a partitioning scheme for such a resource in order to perform
fine tuning for his application. In many cases after setting the
partitioning of the resource driver reload is needed. This patchset add
support for hot reset of the driver.

Such an abstraction can be coupled with devlink's dpipe interface, which
models the ASIC's pipeline as an graph of match/action tables. By modeling
the hardware resource object, and by coupling it to several dpipe tables,
further visibility can be achieved in order to debug ASIC-wide issues.

The proposed interface will provide the user the ability to understand the
limitations of the hardware, and receive notification regarding its occupancy.
Furthermore, monitoring the resource occupancy can be done in real-time and
can be useful in many cases.

Userspace part prototype can be found at https://github.com/arkadis/iproute2/
at resource_dev branch.

Arkadi Sharshevsky (11):
  devlink: Add per devlink instance lock
  devlink: Add support for resource abstraction
  devlink: Add support for reload
  devlink: Add relation between dpipe and resource
  mlxsw: pci: Add support for performing bus reset
  mlxsw: spectrum: Add "spectrum" prefix macro
  mlxsw: spectrum: Register KVD resources with devlink
  mlxsw: spectrum_dpipe: Connect dpipe tables to resources
  mlxsw: spectrum: Add support for getting kvdl occupancy
  mlxsw: pci: Add support for getting resource through devlink
  mlxsw: core: Add support for reload

 drivers/net/ethernet/mellanox/mlxsw/core.c         |  85 +++-
 drivers/net/ethernet/mellanox/mlxsw/core.h         |  16 +-
 drivers/net/ethernet/mellanox/mlxsw/i2c.c          |   5 +-
 drivers/net/ethernet/mellanox/mlxsw/pci.c          | 101 ++--
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c     | 257 +++++++++-
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h     |  15 +
 .../net/ethernet/mellanox/mlxsw/spectrum_dpipe.c   |  72 ++-
 .../net/ethernet/mellanox/mlxsw/spectrum_kvdl.c    |  19 +
 include/net/devlink.h                              |  95 ++++
 include/uapi/linux/devlink.h                       |  16 +
 net/core/devlink.c                                 | 539 ++++++++++++++++++---
 11 files changed, 1077 insertions(+), 143 deletions(-)

-- 
2.9.5