bnxt_en: Add kTLS TX offload support

This patchset adds kTLS offload support for TX direction.  A number
of new files are added:

bnxt_mpc.[ch] handle midpath channels (MPCs) used to offload kTLS
connections to the chip's crypto blocks without going through FW.

bnxt_crypto.[ch] handle the crypto interface and resources.

bnxt_ktls.[ch] handle kTLS offload.

A new CONFIG_BNXT_TLS is added to enable all of the above.  The first 6
patches add the MPC logic including resource accounting and reservations.
The next 5 patches add the crypto logic to handle the crypto resources
and to send/receive control data using the MPCs.  The last 4 patches
add kTLS offload for the TX direction.

There will be a follow-on patchset to make the TX offload more complete
and to add the RX direction offload.

v3:
Fix most AI reported issues from Jakub.

v2:
https://lore.kernel.org/netdev/20260512212105.3488258-1-m...

Fix unused variable compile warnings in patch 10 and 12 by reorganizing
the patches (reported by Jakub)

Fix some error recovery issues in patch 12

v1:
https://lore.kernel.org/netdev/20260504235836.3019499-1-m...

Michael Chan (15):
  bnxt_en: Add Midpath channel information
  bnxt_en: Account for the MPC TX and CP rings
  bnxt_en: Set default MPC ring count
  bnxt_en: Rename xdp_tx_lock to tx_lock
  bnxt_en: Allocate and free MPC software structures
  bnxt_en: Allocate and free MPC channels from firmware
  bnxt_en: Allocate crypto structure and backing store
  bnxt_en: Reserve crypto RX and TX key contexts on a PF
  bnxt_en: Add infrastructure for crypto key context IDs
  bnxt_en: Add MPC transmit and completion functions
  bnxt_en: Add crypto MPC transmit/completion infrastructure
  bnxt_en: Support kTLS TX offload by implementing .tls_dev_add/del()
  bnxt_en: Implement kTLS TX normal path
  bnxt_en: Add support for inline transmit BDs
  bnxt_en: Add kTLS retransmission support

 drivers/net/ethernet/broadcom/Kconfig         |   9 +
 drivers/net/ethernet/broadcom/bnxt/Makefile   |   1 +
 drivers/net/ethernet/broadcom/bnxt/bnxt.c     | 255 ++++++-
 drivers/net/ethernet/broadcom/bnxt/bnxt.h     |  91 ++-
 .../net/ethernet/broadcom/bnxt/bnxt_crypto.c  | 614 +++++++++++++++
 .../net/ethernet/broadcom/bnxt/bnxt_crypto.h  | 226 ++++++
 .../net/ethernet/broadcom/bnxt/bnxt_ethtool.c |  53 ++
 drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c |   2 +-
 .../net/ethernet/broadcom/bnxt/bnxt_ktls.c    | 572 ++++++++++++++
 .../net/ethernet/broadcom/bnxt/bnxt_ktls.h    | 175 +++++
 drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.c | 717 ++++++++++++++++++
 drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.h | 210 +++++
 .../net/ethernet/broadcom/bnxt/bnxt_sriov.c   |   6 +-
 drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c |   4 +-
 include/linux/bnxt/hsi.h                      |  37 +
 15 files changed, 2918 insertions(+), 54 deletions(-)
 create mode 100644 drivers/net/ethernet/broadcom/bnxt/bnxt_crypto.c
 create mode 100644 drivers/net/ethernet/broadcom/bnxt/bnxt_crypto.h
 create mode 100644 drivers/net/ethernet/broadcom/bnxt/bnxt_ktls.c
 create mode 100644 drivers/net/ethernet/broadcom/bnxt/bnxt_ktls.h
 create mode 100644 drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.c
 create mode 100644 drivers/net/ethernet/broadcom/bnxt/bnxt_mpc.h

-- 
2.51.0