[dpdk-dev] [PATCH v6 00/16] Flow API overhaul for switch offloads

[Adrien Mazarguil <adrien.mazarguil@6wind.com>]

As summarized in a prior RFC [1], the flow API (rte_flow) was chosen as a
means to manage switch offloads supported by many devices (usually going by
names such as E-Switch or vSwitch) through user-specified flow rules.

Combined with the need to support encap/decap actions, this requires a
change in the way flow actions are processed (in order and possibly
repeated) which modifies the behavior of some of the existing actions, thus
warranting a major ABI breakage.

Given this ABI breakage is also required by other work submitted for the
current release [2][3], this series addresses various longstanding issues
with the flow API and makes minor improvements in preparation for upcoming
features.

Changes summary:

- Additional error types.
- Clearer documentation.
- Improved C++ compatibility.
- Exhaustive RSS action.
- Consistent behavior of VLAN pattern item.
- New "transfer" attribute bringing consistency to VF/PF pattern items.
- Confusing "PORT" pattern item renamed "PHY_PORT", with new action
  counterpart.
- New "PORT_ID" pattern item and action to be used with port representors.

This series piggybacks on the major ABI update introduced by a prior
commit [4] for DPDK 18.05 and depends on several fixes [5] which must be
applied first.

[1] "[RFC] Switch device offload with DPDK"
    http://dpdk.org/ml/archives/dev/2018-March/092513.html

[2] commit 676b605182a5 ("doc: announce ethdev API change for RSS
    configuration")

[3] "[PATCH v1 00/21] MLX5 tunnel Rx offloading"
    http://dpdk.org/ml/archives/dev/2018-March/092264.html

[4] commit 653e038efc9b ("ethdev: remove versioning of filter control
    function")

[5] "[PATCH v6 00/11] Bunch of flow API-related fixes"
    http://dpdk.org/ml/archives/dev/2018-April/098035.html

v6 changes:

- Fixed mlx5 issue raised by Nelio in "ethdev: flatten RSS configuration in
  flow API".
- Updated release notes (API update / ABI breakage) in relevant patches.
- Removed Xueming's deprecation notice in "ethdev: add encap level to RSS
  flow API action" since it's covered by this series.
- Reworded a few patches as fixes since they address API flaws.
- Rebased series once again.

v5 changes:

- Fixed errors reported by GCC and Clang in patch 05/16 ("ethdev: alter
  behavior of flow API actions").
- Rebased series once again.

v4 changes:

- No change besides new acked-by lines, rebased series to address conflicts.

v3 changes:

- Rebased series, fixed latest conflicts.
- Addressed Andrew's comments, see affected patches for details:
  - Empty RSS types in flow rule means PMD-specific RSS instead of no RSS.
  - RSS hash function now explicitly compared against
    RTE_ETH_HASH_FUNCTION_DEFAULT instead of 0 in all PMDs.
  - sfc PMD updated to also accept Toeplitz.
  - Implicit VLAN TPID matching now removed from all PMDs.
  - Default mask upate for VLAN TCI now split as separate patch #11.
  - Ingress/egress definition clarified in patch #12.

v2 changes:

- Squashed "ethdev: update ABI for flow API functions" in subsequent
  patches.
- Emphasized ABI impact in relevant commit logs.
- Modified documentation in "ethdev: alter behavior of flow API actions" to
  describe how terminating flow rules without any action of the fate kind
  result in undefined behavior instead of dropping traffic.
- Fixed other minor documentation formatting issues.
- Modified "ethdev: refine TPID handling in flow API" as follows:
  - Using standard macro definitions for VLAN, QinQ and E-Tag EtherTypes.
  - Fixed endian conversion in sfc.
  - Replaced a condition in VLAN pattern item processing with an assertion
    check for i40e.

Adrien Mazarguil (16):
  ethdev: add error types to flow API
  ethdev: clarify flow API pattern items and actions
  doc: remove flow API migration section
  ethdev: remove DUP action from flow API
  ethdev: alter behavior of flow API actions
  ethdev: fix C99 flexible arrays from flow API
  ethdev: flatten RSS configuration in flow API
  ethdev: add hash function to RSS flow API action
  ethdev: add encap level to RSS flow API action
  ethdev: fix TPID handling in flow API
  ethdev: fix default VLAN TCI mask in flow API
  ethdev: add transfer attribute to flow API
  ethdev: fix behavior of VF/PF in flow API
  ethdev: rename physical port item in flow API
  ethdev: add physical port action to flow API
  ethdev: add port ID item and action to flow API

 app/test-pmd/cmdline_flow.c                 | 394 +++++++++++----
 app/test-pmd/config.c                       |  78 +--
 doc/guides/nics/tap.rst                     |   2 +-
 doc/guides/prog_guide/rte_flow.rst          | 618 ++++++++---------------
 doc/guides/rel_notes/deprecation.rst        |   4 -
 doc/guides/rel_notes/release_18_05.rst      |  48 ++
 doc/guides/testpmd_app_ug/testpmd_funcs.rst |  60 ++-
 drivers/net/bnxt/bnxt_filter.c              |  49 +-
 drivers/net/e1000/e1000_ethdev.h            |  13 +-
 drivers/net/e1000/igb_ethdev.c              |   4 +-
 drivers/net/e1000/igb_flow.c                |  83 ++-
 drivers/net/e1000/igb_rxtx.c                |  55 +-
 drivers/net/enic/enic_flow.c                |  50 +-
 drivers/net/i40e/i40e_ethdev.c              |  57 ++-
 drivers/net/i40e/i40e_ethdev.h              |  15 +-
 drivers/net/i40e/i40e_flow.c                | 130 +++--
 drivers/net/ixgbe/ixgbe_ethdev.c            |   7 +-
 drivers/net/ixgbe/ixgbe_ethdev.h            |  13 +-
 drivers/net/ixgbe/ixgbe_flow.c              |  91 +++-
 drivers/net/ixgbe/ixgbe_rxtx.c              |  55 +-
 drivers/net/mlx4/mlx4.c                     |   2 +-
 drivers/net/mlx4/mlx4_flow.c                | 117 +++--
 drivers/net/mlx4/mlx4_flow.h                |   2 +-
 drivers/net/mlx4/mlx4_rxq.c                 |   2 +-
 drivers/net/mlx4/mlx4_rxtx.h                |   2 +-
 drivers/net/mlx5/mlx5_flow.c                | 316 ++++++------
 drivers/net/mlx5/mlx5_rxq.c                 |  26 +-
 drivers/net/mlx5/mlx5_rxtx.h                |  26 +-
 drivers/net/mvpp2/mrvl_flow.c               |  32 +-
 drivers/net/sfc/sfc_flow.c                  |  78 ++-
 drivers/net/tap/tap_flow.c                  |  49 +-
 examples/ipsec-secgw/ipsec.c                |  21 +-
 lib/librte_ether/rte_ethdev_version.map     |  16 +-
 lib/librte_ether/rte_flow.c                 |  68 +--
 lib/librte_ether/rte_flow.h                 | 339 ++++++++-----
 lib/librte_net/rte_ether.h                  |   1 +
 36 files changed, 1796 insertions(+), 1127 deletions(-)

-- 
2.11.0