[PATCH v10 00/11] 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>
Acked-by: Ori Kam <orika at nvidia.com>
Acked-by: Ajit Khaparde <ajit.khaparde at broadcom.com>

---
v10: removed missed check in async API

v9:
- changed sanity checks order
- added reconfiguration explanation
- added remarks on mandatory direction
- renamed operation attributes
- removed all checks in async API
- removed all errno descriptions

v8: fixed documentation indentation

v7:
- added sanity checks and device state validation
- added flow engine state validation
- added ingress/egress/transfer attibutes to templates
- moved user_data to a parameter list
- renamed asynchronous functions from "_q_" to "_async_"
- created a separate commit for indirect actions

v6: addressed more review comments
- fixed typos
- rewrote code snippets
- add a way to get queue size
- renamed port/queue attibutes parameters

v5: changed titles for testpmd commits

v4: 
- removed structures versioning
- introduced new rte_flow_port_info structure for rte_flow_info_get API
- renamed rte_flow_table_create to rte_flow_template_table_create

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 (11):
  ethdev: introduce flow engine configuration
  ethdev: add flow item/action templates
  ethdev: bring in async queue-based flow rules operations
  ethdev: bring in async indirect actions operations
  app/testpmd: add flow engine configuration
  app/testpmd: add flow template management
  app/testpmd: add flow table management
  app/testpmd: add async flow create/destroy operations
  app/testpmd: add flow queue push operation
  app/testpmd: add flow queue pull operation
  app/testpmd: add async indirect actions operations

 app/test-pmd/cmdline_flow.c                   | 1726 ++++++++++++++++-
 app/test-pmd/config.c                         |  778 ++++++++
 app/test-pmd/testpmd.h                        |   67 +
 .../prog_guide/img/rte_flow_async_init.svg    |  205 ++
 .../prog_guide/img/rte_flow_async_usage.svg   |  354 ++++
 doc/guides/prog_guide/rte_flow.rst            |  345 ++++
 doc/guides/rel_notes/release_22_03.rst        |   26 +
 doc/guides/testpmd_app_ug/testpmd_funcs.rst   |  383 +++-
 lib/ethdev/ethdev_driver.h                    |    7 +-
 lib/ethdev/rte_flow.c                         |  454 +++++
 lib/ethdev/rte_flow.h                         |  741 +++++++
 lib/ethdev/rte_flow_driver.h                  |  108 ++
 lib/ethdev/version.map                        |   15 +
 13 files changed, 5113 insertions(+), 96 deletions(-)
 create mode 100644 doc/guides/prog_guide/img/rte_flow_async_init.svg
 create mode 100644 doc/guides/prog_guide/img/rte_flow_async_usage.svg

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2.18.2