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.
---
v4:
- Patch 1:
- Validate rx_timestamp_offset (8 <= offset <= 256) and valid_hint_offset
(1 <= offset <= 256) bounds.
- Revert parse_integer_arg() to base 10 and add dedicated parse_hex_arg()
for validity mask.
- Optimize fast-path check and use rte_pktmbuf_mtod_offset() macro.
- Preserve config.tx_type in SIOCSHWTSTAMP instead of forcing
HWTSTAMP_TX_OFF.
- Return -errno on socket failure and replace (caddr_t) cast with
(void *).
- Advertise RTE_ETH_RX_OFFLOAD_TIMESTAMP conditionally when
rx_timestamp_offset >= 0.
- Update af_xdp.ini features matrix with Timestamp offload = Y.
- Document CAP_NET_ADMIN requirement and persistent HW filter side
effect in af_xdp.rst.
- Patch 2:
- Move ptp_fd into pmd_process_private for multi-process safety.
- Decouple /dev/ptpX opening from RTE_ETH_RX_OFFLOAD_TIMESTAMP.
- Move read_clock documentation out of "Options" into its own section
in af_xdp.rst.
- Add #ifndef guards around CLOCKFD and FD_TO_CLOCKID macro definitions.
- Replace (caddr_t) cast with (void *).
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 | 46 ++++
doc/guides/nics/features/af_xdp.ini | 1 +
doc/guides/rel_notes/release_26_07.rst | 7 +
drivers/net/af_xdp/rte_eth_af_xdp.c | 322 ++++++++++++++++++++++++-
4 files changed, 371 insertions(+), 5 deletions(-)
--
2.55.0.508.g3f0d502094-goog
