[PATCH v3 0/2] net/af_xdp: add Rx timestamping and read_clock support

This patch series introduces support for dynamic RX timestamping and
clock querying in the AF_XDP Poll Mode Driver.

The first patch introduces three new vdev devargs to specify
layout-agnostic metadata offsets and bitmasks for extracting hardware
RX timestamps from XDP metadata into the mbuf dynamic timestamp field.

The second patch implements the read_clock ethdev operation, querying
ethtool for the interface's PTP Hardware Clock index at start and using
clock_gettime to query the NIC hardware clock time.
---
v3:
- Patch 1:
  - Add PMD documentation and release notes entry.
  - Move dynamic mbuf timestamp field registration to eth_dev_start().
  - Replace 64-bit pointer casting with memcpy.
  - Add devargs validation and support auto-base integer parsing.
- Patch 2:
  - Add documentation and release notes entry.
  - Add PTP file descriptor cleanup on device start, stop, and close.
  - Return -errno on clock_gettime() failure and fix PTP open error logging.

v2:
- Patch 1:
  - Replace static metadata struct assumption with configurable vdev devargs
    for layout-agnostic timestamp offset extraction and validity verification.
- Patch 2:
  - New patch introduced in v2 to support read_clock ethdev operation.
---

Mark Blasko (2):
  net/af_xdp: add af_xdp rx metadata and dynamic timestamping support
  net/af_xdp: add read_clock support to AF_XDP PMD

 doc/guides/nics/af_xdp.rst             |  42 ++++
 doc/guides/rel_notes/release_26_07.rst |   7 +
 drivers/net/af_xdp/rte_eth_af_xdp.c    | 279 ++++++++++++++++++++++++-
 3 files changed, 322 insertions(+), 6 deletions(-)

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2.55.0.229.g6434b31f56-goog