[PATCH 0/3] net/gve: TSO descriptor count fixes for GVE DQO

[Joshua Washington <joshwash@google.com>]

https://inbox.dpdk.org/dev/20250707231812.1937260-7-joshwash@google.com/
introduced descriptor limit checks for TSO packets in DPDK.
Unfortunately, a couple of bugs have been found in the implementation.

This patch series introduces fixes for those bugs while correcting the
overly restrictive behavior recently introduced mandating that all
headers be in the same buffer.

The final patch in the series introduces tx_pkt_prepare as an option to
ensure that there is a way to get a clear signal of when packets violate
hardware limitations. Before a recently introduced patch, the GVE
behavior was to stop transmitting at the first invalid packet, which
would allow the application to do any necessary linearization or packet
modification before attempting to transmit again. It turns out that that
behavior is considered incorrect, so offer tx_pkt_prepare as an
alternative.

Depends-on: series-39707 ("net/gve: fix DQO Tx queue stalls")

Joshua Washington (3):
  net/gve: fix segment TSO segment offset calculation
  net/gve: account for multi-mbuf headers when validating TSO
  net/gve: introduce Tx packet preparation for DQO format

 drivers/net/gve/base/gve_desc_dqo.h |   1 +
 drivers/net/gve/gve_ethdev.h        |   3 +
 drivers/net/gve/gve_tx_dqo.c        | 104 ++++++++++++++++++++++++----
 3 files changed, 96 insertions(+), 12 deletions(-)

-- 
2.56.0.307.g5fe7bd680c-goog