[dpdk-dev] [v1] ethdev: support Tx queue used count

[David Marchand]

Hi Jerin,

On Thu, Jan 11, 2024 at 4:32 PM <jerinj at marvell.com> wrote:
>
> From: Jerin Jacob <jerinj at marvell.com>
>
> Introduce a new API to retrieve the number of used descriptors
> in a Tx queue. Applications can leverage this API in the fast path to
> inspect the Tx queue occupancy and take appropriate actions based on the
> available free descriptors.
>
> A notable use case could be implementing Random Early Discard (RED)
> in software based on Tx queue occupancy.
>
> Signed-off-by: Jerin Jacob <jerinj at marvell.com>
> ---
>  doc/guides/nics/features.rst         | 10 ++++
>  doc/guides/nics/features/default.ini |  1 +
>  lib/ethdev/ethdev_driver.h           |  2 +
>  lib/ethdev/ethdev_private.c          |  1 +
>  lib/ethdev/ethdev_trace_points.c     |  3 ++
>  lib/ethdev/rte_ethdev.h              | 74 ++++++++++++++++++++++++++++
>  lib/ethdev/rte_ethdev_core.h         |  7 ++-
>  lib/ethdev/rte_ethdev_trace_fp.h     |  8 +++
>  lib/ethdev/version.map               |  3 ++
>  9 files changed, 108 insertions(+), 1 deletion(-)

We need some libabigail suppression rule for the reserved2 field update.
Looking at some previous rules, something like below can do the trick.

diff --git a/devtools/libabigail.abignore b/devtools/libabigail.abignore
index 21b8cd6113..ba240f74d5 100644
--- a/devtools/libabigail.abignore
+++ b/devtools/libabigail.abignore
@@ -33,3 +33,6 @@
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ; Temporary exceptions till next major ABI version ;
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+[suppress_type]
+        name = rte_eth_fp_ops
+        has_data_member_inserted_between = {offset_of(reserved2), end}


-- 
David Marchand