[RFC 0/3] ethdev: introduce device reinitialisation API

[Ciara Loftus <ciara.loftus@intel.com>]

This RFC arose from a discussion [1] around whether a generic API that
performs device reset and reinitialisation would be useful. While the
net effect of a call to such an API can be achieved with a sequence of
calls to existing APIs (reset, configure, rx/tx queue_setup), the
benefit of encapsulating this all under one API is twofold:
1. the burden is taken off the user for supplying the device
configuration in the call, we use the existing device conf under the
hood and only need the port_id as input.
2. it can prevent potential unnecessary/repeat reconfiguration steps.
The PMD dev_reinit ops will only perform the necessary reconfiguration
steps after the device reset.

Patch 1 implements the API, Patch 2 implements one example of the reinit
op for the iavf driver and Patch 3 integrates the API into testpmd.

[1] https://mails.dpdk.org/archives/dev/2025-October/325386.html

Ciara Loftus (3):
  ethdev: introduce device reinitialisation API
  net/iavf: implement device reinitialisation callback
  app/testpmd: support port reinitialisation

 app/test-pmd/cmdline.c               | 15 +++++---
 app/test-pmd/testpmd.c               | 26 ++++++++++++++
 app/test-pmd/testpmd.h               |  1 +
 drivers/net/intel/iavf/iavf.h        |  2 +-
 drivers/net/intel/iavf/iavf_ethdev.c | 52 ++++++++++++++++++++++------
 drivers/net/intel/iavf/iavf_vchnl.c  |  2 +-
 lib/ethdev/ethdev_driver.h           |  4 +++
 lib/ethdev/ethdev_trace.h            |  7 ++++
 lib/ethdev/ethdev_trace_points.c     |  3 ++
 lib/ethdev/rte_ethdev.c              | 32 +++++++++++++++++
 lib/ethdev/rte_ethdev.h              | 25 +++++++++++++
 11 files changed, 151 insertions(+), 18 deletions(-)

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2.34.1