[PATCH v11 net-next 0/7] octeontx2-af: npc: Enhancements.

[Ratheesh Kannoth <rkannoth@marvell.com>]

This series extends Marvell octeontx2-af support for CN20K NPC (MCAM
debuggability, allocation policy, default-rule lifetime, and optional KPU
profiles from firmware files), adds a devlink mechanism for multi-value
parameters, and adjusts devlink param netlink helpers and mlx5 so stack
usage stays within -Wframe-larger-than limits once union
devlink_param_value grows.

Patch 1 improves CN20K MCAM visibility in debugfs: mcam_layout marks
enabled entries, dstats reports per-entry hit deltas, and mismatch lists
enabled entries without a PF mapping. MCAM enable state is tracked in a
bitmap updated from the CN20K enable path.

Patch 2 heap-allocates the temporary devlink param value array in
mlx5e_pcie_cong_get_thresh_config() so a larger union devlink_param_value
does not overflow the stack (patches 3-4).

Patch 3 changes devlink_nl_param_value_put() and
devlink_nl_param_value_fill_one() to pass union devlink_param_value by
pointer instead of by value. Passing two copies of the union by value in
the param netlink path consumes over 500 bytes of argument stack and risks
CONFIG_FRAME_WARN as the union grows beyond its historical size (patch 4).

Patch 4 (Saeed) introduces DEVLINK_PARAM_TYPE_U64_ARRAY and nested
DEVLINK_ATTR_PARAM_VALUE_DATA attributes so drivers and user space can
exchange bounded u64 arrays; YAML, uapi, and netlink validation are
updated.

Patch 5 adds a runtime devlink parameter srch_order to reorder CN20K
subbank search during MCAM allocation.

Patch 6 ties default MCAM entries (broadcast, multicast, promisc, ucast)
to NIX LF alloc/free on CN20K, adds NIX_LF_DONT_FREE_DFT_IDXS for kernel
PF suspend-style teardown, and adjusts free-all and default-entry paths so
default rules are not freed as ordinary user rules.

Patch 7 allows loading a custom KPU profile from /lib/firmware/kpu via
module parameter kpu_profile on non-CN20K paths, with cam2/ptype support
and shared helpers for firmware-sourced vs filesystem-sourced profiles;
CN20K continues to use its existing custom KPU apply path.

The mlx5 change sits immediately before the devlink patches so the series
applies cleanly and stays warning-free when built incrementally;
pass-by-pointer precedes the U64 array type so helpers are not copying an
even larger union by value.

Ratheesh Kannoth (6):
  octeontx2-af: npc: cn20k: debugfs enhancements
  net/mlx5e: heap-allocate devlink param values
  devlink: Change function syntax.
  octeontx2-af: npc: cn20k: add subbank search order control
  octeontx2-af: npc: cn20k: dynamically allocate and free default MCAM
    entries
  octeontx2-af: npc: Support for custom KPU profile from filesystem

Saeed Mahameed (1):
  devlink: Implement devlink param multi attribute nested data values

 Documentation/netlink/specs/devlink.yaml      |   4 +
 .../marvell/octeontx2/af/cn20k/debugfs.c      | 126 +++-
 .../ethernet/marvell/octeontx2/af/cn20k/npc.c | 272 +++++++--
 .../ethernet/marvell/octeontx2/af/cn20k/npc.h |  10 +
 .../net/ethernet/marvell/octeontx2/af/mbox.h  |   1 +
 .../net/ethernet/marvell/octeontx2/af/npc.h   |  17 +
 .../net/ethernet/marvell/octeontx2/af/rvu.h   |  12 +-
 .../marvell/octeontx2/af/rvu_devlink.c        |  92 ++-
 .../ethernet/marvell/octeontx2/af/rvu_nix.c   |  69 ++-
 .../ethernet/marvell/octeontx2/af/rvu_npc.c   | 571 ++++++++++++++----
 .../ethernet/marvell/octeontx2/af/rvu_npc.h   |  17 +
 .../ethernet/marvell/octeontx2/af/rvu_reg.h   |   1 +
 .../ethernet/marvell/octeontx2/nic/otx2_pf.c  |   4 +-
 .../mellanox/mlx5/core/en/pcie_cong_event.c   |  11 +-
 include/net/devlink.h                         |   8 +
 include/uapi/linux/devlink.h                  |   1 +
 net/devlink/netlink_gen.c                     |   2 +
 net/devlink/param.c                           | 117 +++-
 18 files changed, 1077 insertions(+), 258 deletions(-)

--

v10 -> v11:
	https://lore.kernel.org/netdev/20260403025533.6250-1-rkannoth@marvell.com/

v9 -> v10: Addressed Paolo comments
	https://lore.kernel.org/netdev/
	20260330053105.2722453-1-rkannoth@marvell.com/

v8 -> v9: Addressed Simon comments
	https://lore.kernel.org/netdev/
	20260325072159.1126964-1-rkannoth@marvell.com/

v7 -> v8: Addressed Simon comments
	https://lore.kernel.org/netdev/
	20260323035110.3908741-1-rkannoth@marvell.com/T/#t

v6 -> v7: Addressed Simon comments
	https://lore.kernel.org/netdev/20260320165432.98832-1-horms@kernel.org/

v5 -> v6: Addressed Jakub,Jiri comments
	https://lore.kernel.org/netdev/
	20260317045623.250187-1-rkannoth@marvell.com/

v4 -> v5: Addressed Jakub comments
	https://lore.kernel.org/netdev/
	20260312022754.2029595-6-rkannoth@marvell.com/

v3 -> v4: Addressed Simon comments
	https://lore.kernel.org/netdev/abDeXLpMMxp7G1v3@rkannoth-OptiPlex-7090/#t

v2 -> v3: Addressed Simon comments.
	https://lore.kernel.org/netdev/
	20260304043032.3661647-1-rkannoth@marvell.com/

v1 -> v2: Addressed Jakub comments.
	https://lore.kernel.org/netdev/
	20260302085803.2449828-1-rkannoth@marvell.com/#t

2.43.0