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