[PATCH v8 net-next 0/6] 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) and adds a devlink mechanism for
multi-value parameters, with a small mlx5 follow-up to keep stack usage
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 (patch 3).

Patch 3 (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; devlink_nl_param_fill() moves large locals
to the heap as well.

Patch 4 adds a runtime devlink parameter npc_srch_order (U64 array) to
reorder CN20K subbank search during MCAM allocation.

Patch 5 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 6 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 is placed immediately before the devlink union growth
so the series applies cleanly and stays warning-free when built
incrementally.

Ratheesh Kannoth (5):
  octeontx2-af: npc: cn20k: debugfs enhancements
  net/mlx5e: heap-allocate devlink param values
  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 | 255 +++++++--
 .../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   |   6 +-
 .../marvell/octeontx2/af/rvu_devlink.c        |  92 +++-
 .../ethernet/marvell/octeontx2/af/rvu_nix.c   |  16 +-
 .../ethernet/marvell/octeontx2/af/rvu_npc.c   | 521 ++++++++++++++----
 .../ethernet/marvell/octeontx2/af/rvu_npc.h   |  17 +
 .../ethernet/marvell/octeontx2/af/rvu_reg.h   |   1 +
 .../ethernet/marvell/octeontx2/nic/otx2_pf.c  |   6 +-
 .../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                           |  91 ++-
 18 files changed, 979 insertions(+), 206 deletions(-)

--
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