netdev - [patch net-next v3 00/11] Add support for resource abstraction

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Date:   Mon, 15 Jan 2018 08:59:01 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, arkadis@...lanox.com, 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 v3 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 such cases performing driver reload is
needed for the changes to take place, thus this patchset also adds support
for hot reload.

Such an abstraction can be coupled with devlink's dpipe interface, which
models the ASIC's pipeline as a 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.

---
v2->v3
- Mix/Max/Gran attributes.
- Add resource consumption per table.
- Change basic resource unit to 'entry'.
- ABI documentation.

v1->v2
- Add resource size attribute.
- Fix split bug.

---
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: 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
  mlxsw: documentation: Add resources ABI documentation

 Documentation/ABI/testing/devlink-resource-mlxsw   |  33 ++
 drivers/net/ethernet/mellanox/mlxsw/core.c         |  92 +++-
 drivers/net/ethernet/mellanox/mlxsw/core.h         |  16 +-
 drivers/net/ethernet/mellanox/mlxsw/i2c.c          |   5 +-
 drivers/net/ethernet/mellanox/mlxsw/pci.c          |  98 ++--
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c     | 249 +++++++++
 drivers/net/ethernet/mellanox/mlxsw/spectrum.h     |  13 +
 .../net/ethernet/mellanox/mlxsw/spectrum_dpipe.c   |  81 ++-
 .../net/ethernet/mellanox/mlxsw/spectrum_kvdl.c    |  26 +
 include/net/devlink.h                              | 115 ++++
 include/uapi/linux/devlink.h                       |  25 +
 net/core/devlink.c                                 | 594 +++++++++++++++++++--
 12 files changed, 1213 insertions(+), 134 deletions(-)
 create mode 100644 Documentation/ABI/testing/devlink-resource-mlxsw

-- 
2.14.3