[PATCH v3 00/10] ethdev: datapath-focused flow rules management

[Alexander Kozyrev]

Three major changes to a generic RTE Flow API were implemented in order
to speed up flow rule insertion/destruction and adapt the API to the
needs of a datapath-focused flow rules management applications:

1. Pre-configuration hints.
Application may give us some hints on what type of resources are needed.
Introduce the configuration routine to prepare all the needed resources
inside a PMD/HW before any flow rules are created at the init stage.

2. Flow grouping using templates.
Use the knowledge about which flow rules are to be used in an application
and prepare item and action templates for them in advance. Group flow rules
with common patterns and actions together for better resource management.

3. Queue-based flow management.
Perform flow rule insertion/destruction asynchronously to spare the datapath
from blocking on RTE Flow API and allow it to continue with packet processing.
Enqueue flow rules operations and poll for the results later.

testpmd examples are part of the patch series. PMD changes will follow.

RFC: https://patchwork.dpdk.org/project/dpdk/cover/20211006044835.3936226-1-akozyrev@nvidia.com/

Signed-off-by: Alexander Kozyrev <akozyrev at nvidia.com>

---
v3: addressed review comments and updated documentation
- added API to get info about pre-configurable resources
- renamed rte_flow_item_template to rte_flow_pattern_template
- renamed drain operation attribute to postpone
- renamed rte_flow_q_drain to rte_flow_q_push
- renamed rte_flow_q_dequeue to rte_flow_q_pull

v2: fixed patch series thread

Alexander Kozyrev (10):
  ethdev: introduce flow pre-configuration hints
  ethdev: add flow item/action templates
  ethdev: bring in async queue-based flow rules operations
  app/testpmd: implement rte flow configuration
  app/testpmd: implement rte flow template management
  app/testpmd: implement rte flow table management
  app/testpmd: implement rte flow queue flow operations
  app/testpmd: implement rte flow push operations
  app/testpmd: implement rte flow pull operations
  app/testpmd: implement rte flow queue indirect actions

 app/test-pmd/cmdline_flow.c                   | 1495 ++++++++++++++++-
 app/test-pmd/config.c                         |  770 +++++++++
 app/test-pmd/testpmd.h                        |   66 +
 doc/guides/prog_guide/img/rte_flow_q_init.svg |   71 +
 .../prog_guide/img/rte_flow_q_usage.svg       |   60 +
 doc/guides/prog_guide/rte_flow.rst            |  318 ++++
 doc/guides/rel_notes/release_22_03.rst        |   20 +
 doc/guides/testpmd_app_ug/testpmd_funcs.rst   |  375 ++++-
 lib/ethdev/rte_flow.c                         |  352 ++++
 lib/ethdev/rte_flow.h                         |  698 ++++++++
 lib/ethdev/rte_flow_driver.h                  |  102 ++
 lib/ethdev/version.map                        |   17 +
 12 files changed, 4324 insertions(+), 20 deletions(-)
 create mode 100644 doc/guides/prog_guide/img/rte_flow_q_init.svg
 create mode 100644 doc/guides/prog_guide/img/rte_flow_q_usage.svg

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2.18.2